diff --git a/.agents/notes/implemented/architecture/2026-06-14-session-persistence.md b/.agents/notes/implemented/architecture/2026-06-14-session-persistence.md
index 4e105ef598..d6f8da3dce 100644
--- a/.agents/notes/implemented/architecture/2026-06-14-session-persistence.md
+++ b/.agents/notes/implemented/architecture/2026-06-14-session-persistence.md
@@ -4,7 +4,7 @@ Status: implemented
 
 ## Problem
 
-Sessions lived only in memory. The example `session-jsonl.ts` plugin (duplicated byte-for-byte in both examples) was write-only telemetry: it buffered `session/event` and appended JSON lines, with no read/replay path, no crash-safety (no fsync, no atomic write, a fire-and-forget dispose drain), no listing, and no format versioning. Nothing could rehydrate a past session from disk into a live agent, so durable resume ("continue yesterday's task"), durable forking, and the ACP `session/load` method ([ACP support](../feature/2026-06-14-acp-agent-client-protocol.md)) were all impossible.
+Sessions lived only in memory. The example `session-jsonl.ts` plugin (duplicated byte-for-byte in both examples) was write-only telemetry: it buffered `session/event` and appended JSON lines, with no read/replay path, no crash-safety (no fsync, no atomic write, a fire-and-forget dispose drain), no listing, and no format versioning. Nothing could rehydrate a past session from disk into a live agent, so durable resume, durable forking, and host-side session browsing were all impossible.
 
 The [event-sourced model](2026-06-11-event-sourced-sessions.md) makes the append-only log the single source of truth and derives LLM history from it. Persistence had to stay faithful to that: persist the existing `SessionEvent` directly, with no parallel "persisted message" type that the log is converted to and from. The backend also had to be swappable — a file store now, a database store later — behind one interface.
 
@@ -31,4 +31,4 @@ Format versioning: the header carries a `version`; `load` rejects any non-curren
 
 ## Consequences
 
-Two new packages and the metadata seam in `dsh-session` (`session.header`, the `create(id?, options?)` signature). Bought: durable resume/fork, a read/replay path, crash tolerance, and the foundation the ACP `session/load` ([ACP support](../feature/2026-06-14-acp-agent-client-protocol.md)) needs — all over the existing event-sourced log, with the backend swappable behind one interface. The reusable `runPersistenceContract` suite holds every backend to the same append-only, contiguous-seq, lazy-materialization, and serializability semantics. Persisting the full log also settles event fidelity: `assistant/chunk` remains verbatim.
+Two new packages and the metadata seam in `dsh-session` (`session.header`, the `create(id?, options?)` signature). Bought: durable resume/fork, a read/replay path, crash tolerance, and host-side session access over the existing event-sourced log, with the backend swappable behind one interface. The reusable `runPersistenceContract` suite holds every backend to the same append-only, contiguous-seq, lazy-materialization, and serializability semantics. Persisting the full log also settles event fidelity: `assistant/chunk` remains verbatim.
diff --git a/.agents/notes/implemented/architecture/2026-06-18-agent-lifecycle-and-ownership-seams.md b/.agents/notes/implemented/architecture/2026-06-18-agent-lifecycle-and-ownership-seams.md
index 3d84c8074b..e8c6db7439 100644
--- a/.agents/notes/implemented/architecture/2026-06-18-agent-lifecycle-and-ownership-seams.md
+++ b/.agents/notes/implemented/architecture/2026-06-18-agent-lifecycle-and-ownership-seams.md
@@ -16,7 +16,7 @@ A new `cancel()` verb on the `Agent` interface — the single public stop primit
 
 ### 2. `AgentHandle` async disposer
 
-`ctx.agents.create`/`resume` (and the `AgentFactory` interface) return `AgentHandle = { agent: Agent; dispose(): Promise<void> }`. The disposer is a **consumer capability** — a registry observer holding only the bare `Agent` cannot tear it down. The caller fiber and registered factory provider are structural co-owners: caller unload enforces structured ownership, while provider unload must stop old instances whose scoped dependency surface resolves through that provider. All three paths reach the same memoized teardown: stop the loop, await its exit and idle flushes (true quiescence, not just the `disposed` status flip), detach the agent, detach its session, and unwind its scope. Each public ID becomes reusable when its exact registry entry detaches; there is no separate reservation-release phase. Config-created agents are already owned by the `AgentLoop` fiber (the handle is discarded). ACP holds each session's disposer in its `SessionRecord` and runs it on disconnect/teardown, so a bare client disconnect leaves no registered agent and no session-store entry — even when `session/load` races teardown (the just-resumed handle is disposed before the closed-guard throw).
+`ctx.agents.create`/`resume` (and the `AgentFactory` interface) return `AgentHandle = { agent: Agent; dispose(): Promise<void> }`. The disposer is a **consumer capability** — a registry observer holding only the bare `Agent` cannot tear it down. The caller fiber and registered factory provider are structural co-owners: caller unload enforces structured ownership, while provider unload must stop old instances whose scoped dependency surface resolves through that provider. All three paths reach the same memoized teardown: stop the loop, await its exit and idle flushes (true quiescence, not just the `disposed` status flip), detach the agent, detach its session, and unwind its scope. Each public ID becomes reusable when its exact registry entry detaches; there is no separate reservation-release phase. Config-created agents are already owned by the `AgentLoop` fiber (the handle is discarded). ACP holds each fresh session's disposer in its `SessionRecord` and runs it on disconnect or plugin teardown, so a bare client disconnect leaves no registered agent and no session-store entry. A create that loses the close race disposes its unpublished handle.
 
 **Teardown ORDER is load-bearing for durability**, and the implementation folds the session lifecycle into the agent's SINGLE composite cordis effect (`SessionStore.prepare`/`enter`/`announce`, replacing a sibling-effect split). A fiber unload disposes sibling effects concurrently (`Promise.all`), which would race removing the session store's append publication hooks against the loop's closing `session/flush` and drop the closing `turn/end`; inside one effect the disposers run as an ordered LIFO chain (loop stopped + `await agent.done` BEFORE the session detaches), so the loop's final flush is captured on BOTH the handle's `dispose()` and a fiber unload. The contained `agent/disposed` and `session/disposed` notifications cannot reject the chain or skip later teardown.
 
@@ -28,7 +28,7 @@ Background-task ownership moved from a `tool-bash` plugin-local `Map<string, Age
 
 These invariants hold and are pinned by tests:
 
-- ACP disconnect/session close leaves no registered agent AND no session-store entry for that session, even when `session/load` races teardown.
+- ACP disconnect or plugin teardown leaves no registered agent and no session-store entry for any bridge-owned session, including a create racing connection closure.
 - `session/cancel` before a queued prompt starts prevents that prompt from running; a later accepted prompt remains an independent queued turn.
 - A `tool-bash` HMR reload does NOT make an existing background task readable or killable by a different session (ownership survives on the executor).
 - Existing non-ACP demos still work without managing handles explicitly; config-created agents remain owned by the `AgentLoop` plugin fiber.
diff --git a/.agents/notes/implemented/architecture/2026-06-20-branded-ids.md b/.agents/notes/implemented/architecture/2026-06-20-branded-ids.md
index e7a3110fce..2a5e7e1a42 100644
--- a/.agents/notes/implemented/architecture/2026-06-20-branded-ids.md
+++ b/.agents/notes/implemented/architecture/2026-06-20-branded-ids.md
@@ -10,7 +10,7 @@ The harness brands `CallId` (`packages/llm/llm/src/brand.ts`) and the shared age
 
 The bash **owner token** is the related sub-case: `BashExecRequest.owner?: string` and `BashExecSpec.owner: string | undefined` (`packages/bash/bash/src/types.ts`) are documented as a deliberately *opaque* isolation key, but in every live caller the value IS the owning agent's shared `Agent.id`/`SessionId` (`callerToken = (exec) => exec.agent?.id` in `packages/bash/tool-bash/src/index.ts`) wearing a different seam-local name. It is compared for access control (`owner !== callerToken(exec)`), so a mismatched-but-well-typed string here is a cross-session isolation bug the type system currently cannot catch. This is the shared id alias covered by the [unified agent/session identity decision](../simplification/2026-06-20-unify-agent-and-session-id.md).
 
-**Gap 2 — brand erosion at the seams of the *already-branded* IDs.** Even `CallId` and `SessionId` decay back to bare `string` at exactly the places confusion is most likely: registry/store key types and public method params. Representative sites include the session store, the agent registry (both keyed by the shared `SessionId`), `ToolPresenter`'s call-id map, ACP's session-id records and loading set, and the persistence coordinator. A brand that is dropped at a collection key buys nothing on lookups — the value of the existing brands is partly unrealized.
+**Gap 2 — brand erosion at the seams of the *already-branded* IDs.** Even `CallId` and `SessionId` decay back to bare `string` at exactly the places confusion is most likely: registry/store key types and public method params. Representative sites include the session store, the agent registry (both keyed by the shared `SessionId`), tool-presentation call-id maps, ACP's session records, and the persistence coordinator. A brand that is dropped at a collection key buys nothing on lookups — the value of the existing brands is partly unrealized.
 
 ## Decision
 
diff --git a/.agents/notes/implemented/architecture/2026-06-20-extract-example-app-packages.md b/.agents/notes/implemented/architecture/2026-06-20-extract-example-app-packages.md
index 05d72e4e49..87529a04dd 100644
--- a/.agents/notes/implemented/architecture/2026-06-20-extract-example-app-packages.md
+++ b/.agents/notes/implemented/architecture/2026-06-20-extract-example-app-packages.md
@@ -40,7 +40,7 @@ The old `base*.yml`/`acp-tail.yml` includes already deduped the *config*, but a
 - Example directories contain only their config, README, and tests: `start.ts`, the infrastructure preamble, and the shared YAML includes are gone.
 - `demo:tui`, `demo:headless`, and `demo:acp` invoke the app-package bins.
 - Each new package has a README and per-file 100% coverage; each app package also has a keyless real-Loader-path bin smoke that catches export-shape failures described in [postmortem 0001](../../../../docs/postmortem/0001-acp-default-export-drops-inject.md).
-- The ACP replay transcript remains unchanged because the plugin set and load order did not change.
+- The ACP replay suite boots through the app-package bin, so protocol wiring and assembled backend behavior cross the real Loader boundary.
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md b/.agents/notes/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md
index f3fe6373ea..f821b0fa4c 100644
--- a/.agents/notes/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md
+++ b/.agents/notes/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md
@@ -67,7 +67,7 @@ A producer loaded without any control surface would let callers start work they
 
 ## Model-facing control surface
 
-`dsh-tool-tasks` registers three kind-independent tools with generic ACP cards:
+`dsh-tool-tasks` registers three kind-independent tools with generic UI cards:
 
 - `task_output(task_id, wait?, timeout_ms?)` reads output and always appends `[status: ...]`. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Reads are non-blocking unless `wait: true`, whose timeout is defaulted and capped by plugin config. A wait timeout reports the still-running status and does not stop the task.
 - `task_list()` returns caller-visible tasks as `<id> [<kind>] <status> — <label>`, or `(no background tasks)`.
diff --git a/.agents/notes/implemented/architecture/2026-06-20-package-hierarchy.md b/.agents/notes/implemented/architecture/2026-06-20-package-hierarchy.md
index 1ba3b94e8b..7ff426bf06 100644
--- a/.agents/notes/implemented/architecture/2026-06-20-package-hierarchy.md
+++ b/.agents/notes/implemented/architecture/2026-06-20-package-hierarchy.md
@@ -2,7 +2,7 @@
 
 Status: implemented
 
-The later [fold-stdio-helper](../simplification/2026-07-04-fold-stdio-ui-helper.md) decision superseded the original `support/ui-stdio` placement, and the [redundant-agent removal](../simplification/2026-07-20-remove-stdio-and-echo-agents.md) subsequently removed that surface entirely. The uniform depth-two hierarchy remains the decision owned here.
+The later [fold-stdio-helper](../simplification/2026-07-04-fold-stdio-ui-helper.md) decision superseded the original `support/ui-stdio` placement, and the [redundant-agent removal](../simplification/2026-07-20-remove-stdio-and-echo-agents.md) removed that surface. The [automation-only ACP decision](../simplification/2026-07-23-acp-automation-only-protocol.md) places ACP under `packages/acp/acp` instead of the human-UI group. The uniform depth-two hierarchy remains the decision owned here.
 
 ## Problem
 
@@ -34,8 +34,9 @@ packages/
     session-persistence/
     session-persistence-jsonl/
     session-persistence-sqlite/
-  ui/                    (product integration)
+  acp/                   (product automation integration)
     acp/
+  ui/                    (human interaction and presentation)
   support/               (dev/test/example infrastructure)
     invariants/
     ui-stdio/
@@ -47,7 +48,7 @@ packages/
 - **Same-name nesting for capability families.** A family's interface package sits at `packages/<group>/<group>/` (`llm/llm`, `bash/bash`, `session-persistence/session-persistence`), with implementations and consumers as flat siblings. There is no extra `adapters/`/`impls/` sub-tier — every package is exactly depth 2, which keeps the workspace glob a clean `packages/*/*` and lets one `@deepseek-ai/dsh-*` tsconfig wildcard resolve every package (unique dir names make first-on-disk-wins unambiguous).
 - **`session` stays in `core/`; persistence is its own family.** The session log is core product API. Its storage backends form a parallel capability family (`session-persistence/`) mirroring `llm/` and `bash/`, rather than nesting under `core/session/`.
 - **`agent-loop` is in `core/`.** It is the one concrete implementation of the `agent` seam, but it ships as the harness's default product loop, so it lives with the core spine. Plugins still depend on the `agent` vocabulary, never on `agent-loop`, so the loop stays swappable.
-- **`invariants` and `ui-stdio` are `support/`, not product.** `invariants` is dev-mode contract checking. `ui-stdio` was extracted from the examples for reuse and the coverage gate — it is example-coupled, so it sits in `support/` alongside `llm-replay` (the snapshot-test replay adapter). `acp` is the only `ui/` member because it is a real product surface (the ACP bridge an editor drives), structurally distinct from the readline demo helper.
+- **Product automation and human UI are separate groups.** `acp` is a product transport under `acp/`, while commands, approvals, interaction, and presentation adapters live under `ui/`. Dev-only invariants and replay infrastructure remain under `support/`.
 
 ### Deduplicating the package lists
 
@@ -68,7 +69,7 @@ Two doc-sync/hygiene gates keep the structure and its references honest, so the
 
 - **A third tier (`adapters/` / `impls/` under each family)** — rejected: uniform depth 2 keeps the workspace glob a clean `packages/*/*` and lets one `@deepseek-ai/dsh-*` tsconfig wildcard resolve every package.
 - **Nesting persistence under `core/session/`** — rejected: the storage backends form a parallel capability family mirroring `llm/` and `bash/`, while the session log itself stays core product API.
-- **`ui-stdio` under `ui/`** — rejected: it is example-coupled dev support, not a product surface; `acp` is the only `ui/` member because an editor actually drives it.
+- **`ui-stdio` under `ui/`** — rejected: it was example-coupled dev support, not a product surface.
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/architecture/2026-06-30-event-domain-semantics.md b/.agents/notes/implemented/architecture/2026-06-30-event-domain-semantics.md
index 56c3fdf231..4ad6e94d5d 100644
--- a/.agents/notes/implemented/architecture/2026-06-30-event-domain-semantics.md
+++ b/.agents/notes/implemented/architecture/2026-06-30-event-domain-semantics.md
@@ -18,13 +18,13 @@ This vocabulary is the foundation for interception decisions, the durable `hook/
 
 **Three domains, one job each, with a single boundary rule.**
 
-- **`session/*` — the durable, replayable FACT log.** Owns `SessionEventMap`; every entry is JSON-only (no live objects). One `session/event` emit per append, plus the `session/flush` parallel durability checkpoint. It is also the live transcript feed: a consumer that wants to render or react to what happened subscribes here, so live rendering and `session/load` replay share one path.
+- **`session/*` — the durable, replayable FACT log.** Owns `SessionEventMap`; every entry is JSON-only (no live objects). One `session/event` emit per append, plus the `session/flush` parallel durability checkpoint. It is also the live transcript feed: a consumer that wants to render or react to what happened subscribes here, so live rendering and replay projections share one path.
 - **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`) that notify with the `Agent` in hand. Turn and step BOUNDARIES are NOT here — they are durable session events read off `session/event`, and so are the token stream (`assistant/chunk`) and mid-turn steering (`steering/message`).
 - **`tools/*` — the tool registry + execution seam.**
 
 **The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A turn or step boundary is a durable fact, so it lives in the session log and is read off the `session/event` feed — it is NOT mirrored as an `agent/*` emit.
 
-**Applying the rule to the boundary twins:** all four boundary mirrors — `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end` — are **REMOVED**. No production consumer needs the live `Agent` at a boundary: the ACP bridge settles from `session/event` `turn/end` plus `agent/status`, and the only turn-mirror consumer (`dsh-ui-stdio`, a disposable test REPL) renders boundaries from `session/event` while retaining its live target object for the fixed `main` label. The step mirrors were removed first (they had no consumer at all); the turn mirrors followed once ui-stdio was migrated — see [the remove-boundary-mirror-events Agent Note](../simplification/2026-06-20-remove-agent-boundary-mirror-events.md), which owns that decision. Removing the emits also simplifies the loop's `closeStep`/`closeTurn` (one append each, no paired emit).
+**Applying the rule to the boundary twins:** all four boundary mirrors — `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end` — are **REMOVED**. No production consumer needs the live `Agent` at a boundary: the ACP bridge correlates its in-flight prompt with the exact `session/event` `turn/start`/`turn/end` pair, and other transcript consumers likewise derive boundaries from the durable stream. See [the remove-boundary-mirror-events Agent Note](../simplification/2026-06-20-remove-agent-boundary-mirror-events.md), which owns that decision. Removing the emits also simplifies the loop's `closeStep`/`closeTurn` (one append each, no paired emit).
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/architecture/2026-07-02-fs-per-session-cwd.md b/.agents/notes/implemented/architecture/2026-07-02-fs-per-session-cwd.md
index 0a6d9b85b1..261745aa23 100644
--- a/.agents/notes/implemented/architecture/2026-07-02-fs-per-session-cwd.md
+++ b/.agents/notes/implemented/architecture/2026-07-02-fs-per-session-cwd.md
@@ -4,9 +4,9 @@ Status: implemented
 
 ## Problem
 
-The ACP bridge gives every session its own workspace: `session/new` records the editor's project directory as `SessionHeader.cwd`, and `dsh-tool-bash` defaults each bash call's `workdir` to the calling agent's `session.header.cwd` (see [the per-session cwd Agent Note work in `packages/ui/acp`](../../../../packages/ui/acp) and `resolveWorkdir` in `dsh-tool-bash`). So a bash command in session A runs in A's project, and in session B runs in B's — one server process, N workspaces.
+The ACP bridge gives every session its own workspace: `session/new` records the automation client's project directory as `SessionHeader.cwd`, and `dsh-tool-bash` defaults each bash call's `workdir` to the calling agent's `session.header.cwd` (see [the ACP package](../../../../packages/acp/acp) and `resolveWorkdir` in `dsh-tool-bash`). So a bash command in session A runs in A's project, and in session B runs in B's — one server process, N workspaces.
 
-Filesystem resolution used one plugin-load cwd while bash used the session project directory. Relative paths therefore disagreed whenever the editor project differed from the server launch directory; snapshots hid the bug by making those paths identical.
+Filesystem resolution used one plugin-load cwd while bash used the session project directory. Relative paths therefore disagreed whenever the automation client's project differed from the server launch directory; snapshots hid the bug by making those paths identical.
 
 A valid absolute cwd can itself have two apparent parents: when it contains `symlink/..`, filesystem lookup follows the symlink before applying `..`, while `path.resolve()` erases both components lexically. Resolving sandbox policy lexically while launching bash from the raw cwd granted the unrelated lexical parent, denied writes in the real workspace, and let filesystem tools resolve relative paths into the wrong directory.
 
@@ -17,7 +17,7 @@ An ordinary symlink cwd exposes the same distinction when the requested relative
 Thread the caller's session cwd into path resolution, exactly as `dsh-tool-bash` already does for `workdir`. When either the cwd or the requested path contains a parent segment, resolve the cwd to its native filesystem identity before any lexical join; ordinary cwd spellings stay stable for display when no traversal makes their identity observable. Reuse the resolved sandbox-policy root for mutations and sandboxed bash calls so one call has one workspace identity. The **caller** (the tool) supplies the cwd; the provider does not read a session or agent.
 
 - `FileSystem.resolve` accepts `resolve(path: string, opts?: { cwd?: string; signal?: AbortSignal }): Promise<FsTarget>`. `opts.cwd` is the base a RELATIVE `path` resolves against; an absolute `path` ignores it; omitting `opts.cwd` uses the backend's own default. `opts.signal` cancels resolution when the backend performs I/O. The options object keeps both caller-owned resolution controls together without positional growth.
-- `dsh-fs-local.resolve` uses `resolveLocalTarget(opts?.cwd ?? this.config.cwd, path)`. `config.cwd` stays the default for a caller that supplies none (non-ACP / no-session use, and the single-session stdio demo where `process.cwd()` IS the workspace).
+- `dsh-fs-local.resolve` uses `resolveLocalTarget(opts?.cwd ?? this.config.cwd, path)`. `config.cwd` stays the default for a caller that supplies no session cwd.
 - `dsh-tool-fs`'s `read`/`write`/`edit` derive the session cwd through a shared `sessionCwd(exec, requestedPath)` helper (`exec.agent?.session.header.cwd`, mirroring bash's `resolveWorkdir`) and pass it to `resolve`. The helper uses native realpath semantics when a parent segment in either value could cross a symlink while retaining ordinary spellings otherwise; a sandboxed mutation reuses the complete policy's `workspaceRoot`; a non-agent / headerless caller yields `undefined`, so the backend applies its default.
 
 ## Alternatives considered
@@ -30,7 +30,7 @@ The default lives in ONE place — the provider's `config.cwd`. `sessionCwd` ret
 
 ## Consequences
 
-- In the ACP demo the fs tools and bash now agree on each session's workspace; an editor can open any project folder and both tool families act on it.
+- In the ACP demo the fs tools and bash agree on each session's workspace; an automation client can select any absolute project directory and both tool families act on it.
 - A session cwd containing `symlink/..`, or an ordinary symlink cwd paired with a parent-traversing relative path, resolves from the same physical workspace for bash, filesystem tools, and the sandbox grant; the lexical parent receives no grant.
 - No change to `FsTarget` identity: `targetKey` is still the realpath of the resolved absolute path, so observed-state keying and symlink identity are unaffected — a correct per-session cwd produces the same key bash targets.
 - Backward compatible: every existing `resolve(path)` call (all in tests) keeps working; the new argument is optional.
diff --git a/.agents/notes/implemented/architecture/2026-07-02-result-time-applied-hunk-diffs.md b/.agents/notes/implemented/architecture/2026-07-02-result-time-applied-hunk-diffs.md
index ce0f146b39..6b724c1fb0 100644
--- a/.agents/notes/implemented/architecture/2026-07-02-result-time-applied-hunk-diffs.md
+++ b/.agents/notes/implemented/architecture/2026-07-02-result-time-applied-hunk-diffs.md
@@ -4,7 +4,7 @@ Status: implemented
 
 ## Problem
 
-The [tagged render-intent union](2026-07-02-tool-render-intent-union.md) gave `dsh-tool-fs` write/edit a `card:'diff'` at CALL time, derived purely from the tool's args: write ⇒ `{oldText:null, newText:content}` (the whole new file), edit ⇒ `{oldText:old_string, newText:new_string}` (the bare replaced snippet). An editor renders that as an inline diff, but it is a **context-free** diff — the bare `old_string`→`new_string` with no surrounding lines, and a `replace_all` that touched five scattered sites still renders as one snippet pair.
+The [tagged render-intent union](2026-07-02-tool-render-intent-union.md) gives `dsh-tool-fs` write/edit a `card:'diff'` at call time, derived purely from the tool's args: write ⇒ `{oldText:null, newText:content}` (the whole new file), edit ⇒ `{oldText:old_string, newText:new_string}` (the bare replaced snippet). A UI can render that as an inline diff, but it is a **context-free** diff — the bare `old_string`→`new_string` with no surrounding lines, and a `replace_all` that touched five scattered sites still renders as one snippet pair.
 
 Driving `claude-agent-acp`'s own ACP bridge shows what a full editor diff looks like: after the mutation applies, it emits a SECOND `tool_call_update` whose diff is the **applied hunk with ±3 context lines** (and one hunk per changed site for `replace_all`), reconstructed from the tool's `structuredPatch`. That result-time hunk is what makes Zed show the change *in place* in the file rather than as a floating snippet. Our tools stopped at the call-time snippet; the completed result carried only the plain "updated successfully" text, no diff.
 
@@ -27,11 +27,11 @@ This remains the general shape ("a tool projects durable result presentation"),
 Per the [capability-seam split](2026-06-13-capability-seams.md), the storage backend returns only **storage facts** and the model-facing tool owns **presentation**:
 
 - `dsh-fs` widens `FsEditOutcome` with `{ before: string; after: string }` and `FsWriteOutcome` with `{ before: string | null; after: string }` (`before: null` ⇒ a create, or an existing-but-undiffable binary/non-UTF-8 file). The local backend already holds both texts at write time; it returns them as raw LF-normalized text, with **no diff/UI concept** entering the seam.
-- `dsh-tool-fs` returns canonical before/after mutation facts and projects contextual hunks as `meta: { diffs: FileDiff[] }`. Successful mutations always complete with a diff card because ACP result content replaces the pending card: creates or unchanged overwrites fall back to an args-derived whole-file diff, while edits use applied hunks. Failed mutations carry no diff metadata and render their error normally.
+- `dsh-tool-fs` returns canonical before/after mutation facts and projects contextual hunks as `meta: { diffs: FileDiff[] }`. Successful mutations complete with a diff view: creates or unchanged overwrites fall back to an args-derived whole-file diff, while edits use applied hunks. Failed mutations carry no diff metadata and render their error normally.
 
-### 3. The bridge renders a `diff` result card
+### 3. UI transports render a `diff` result view
 
-`ToolResultView` gains a `DiffResultView { card:'diff'; title?; diffs: FileDiff[] }`; the bridge's result-side `switch (view.card)` gets a `diff` arm emitting the `{type:'diff'}` `ToolCallContent` blocks (mirroring the call-side arm). An ACP `tool_call_update.content` REPLACES the call's content in an editor, so the result diff **supersedes** the call-time snippet (and keeps the model-facing result text from clobbering it) — the two-update sequence (call snippet, then result diff) matches `claude-agent-acp` exactly.
+`ToolResultView` includes `DiffResultView { card:'diff'; title?; diffs: FileDiff[] }`. TUI and JSON-RPC/Web consumers switch on the same tagged view and replace the pending call's context-free snippet with the applied result hunk. The [automation-only ACP bridge](../simplification/2026-07-23-acp-automation-only-protocol.md) does not carry tool presentation.
 
 ## Alternatives considered
 
diff --git a/.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md b/.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md
index 9d7fac0471..9837f27b82 100644
--- a/.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md
+++ b/.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md
@@ -2,6 +2,8 @@
 
 Status: implemented
 
+> The render-intent union remains current for UI transports; its ACP mapping is superseded by [ACP as an automation-only protocol](../simplification/2026-07-23-acp-automation-only-protocol.md).
+
 ## Problem
 
 A tool declares how its calls render in a UI (an editor's tool-call card) through two callbacks, `presentCall`/`presentResult` on `ToolDefinition`, returning `ToolCallPresentation` / `ToolResultPresentation` with an optional `ToolTerminal` sub-shape. These grew incrementally into a **bag of optional fields**: `title`, `kind`, `rawInput`, `content`, `locations`, `terminal` on the call; `title`, `content`, `terminal` on the result; `cwd`/`output`/`exitCode`/`signal` on `ToolTerminal`. The split of responsibility is muddy:
@@ -10,7 +12,7 @@ A tool declares how its calls render in a UI (an editor's tool-call card) throug
 - Which combinations are *valid* is unwritten: a `terminal` call that also sets `content` means "description above the card"; a generic call that sets `terminal` is meaningless but representable. The type permits nonsense.
 - There is no way to express the one file-tool affordance an editor most wants — a **diff card** (`{path, oldText, newText}`, which Zed renders as an inline diff / new-file preview). `ToolCallPresentation.content` is the *LLM* `ContentBlock[]` vocabulary (text/image), so a tool literally cannot ask for a diff.
 
-The existing `FIXME(tool-presentation)` in `packages/core/tools/src/index.ts` named the fix: "redesign the type so a tool declares its render INTENT once (e.g. a tagged union over card kinds) rather than a bag of optional fields the bridge stitches together." The rejected Agent Note [Collapse tool-owned UI presentation](../../rejected/simplification/2026-06-20-generic-tool-rendering.md) deferred it explicitly: rich rendering "should return later as a tagged render-intent union after there are at least two real tools and two real consumers to validate the vocabulary." That bar is now met — two producer families (`dsh-tool-bash`, `dsh-tool-fs`) and two consumers (the ACP bridge live path + the snapshot replay path).
+The existing `FIXME(tool-presentation)` in `packages/core/tools/src/index.ts` named the fix: "redesign the type so a tool declares its render INTENT once (e.g. a tagged union over card kinds) rather than a bag of optional fields the bridge stitches together." The rejected Agent Note [Collapse tool-owned UI presentation](../../rejected/simplification/2026-06-20-generic-tool-rendering.md) deferred it explicitly: rich rendering "should return later as a tagged render-intent union after there are at least two real tools and two real consumers to validate the vocabulary." That bar is met by multiple producer families plus the TUI and JSON-RPC/Web consumers.
 
 ## Decision
 
@@ -37,8 +39,8 @@ interface TerminalResultView { card: 'terminal'; title?: string; output?: string
 ### Why a tagged union beats the field-bag
 
 - **Invalid states become unrepresentable.** A generic card cannot carry terminal output; a terminal card cannot carry a diff. The old bag permitted all of these.
-- **The bridge switches instead of stitching.** One arm per card kind, each producing exactly the wire shape that card needs, rather than reconciling five optional fields whose interactions are undocumented.
-- **`diff` is a first-class intent.** `dsh-tool-fs` write/edit declare `card:'diff'`; the bridge emits an ACP `{type:'diff', path, oldText, newText}` `ToolCallContent` (already in the SDK's `ToolCallContent` union, previously unused by the bridge). This is the affordance the redesign unlocks.
+- **Consumers switch instead of stitching.** One arm per card kind produces exactly the view that card needs, rather than reconciling five optional fields whose interactions are undocumented.
+- **`diff` is a first-class intent.** `dsh-tool-fs` write/edit declare `card:'diff'` with `{path, oldText, newText}`, allowing capable UIs to render an inline change without tool-name special cases.
 
 ### Producer mapping
 
@@ -54,10 +56,6 @@ interface TerminalResultView { card: 'terminal'; title?: string; output?: string
 
 `presentCall`/`presentResult` remain pure functions of `args` (+ the result for `presentResult`) — they run on live streaming AND session-log replay, so they must be replay-deterministic. Every view is derived from args alone: write's diff is new-file style (`oldText:null`) because the tool has no old content at call time; edit's diff is `old_string`→`new_string`.
 
-## Relative-path display titles
-
-`claude-agent-acp` relativizes a file card's title path against the session cwd (`toDisplayPath`) — `Read src/foo.ts`, not `/abs/proj/src/foo.ts` — while keeping `locations[]`/`diff.path` **raw** (the editor opens the real path). Our `presentCall` is pure/args-only and cannot see the session cwd, so this relativization happens at the **bridge**, which already threads the session cwd into tool-call rendering (the same cwd it uses to resolve a terminal card's header). The bridge relativizes the title only, by an exact structured replace of the known `locations[0].path`/`diffs[0].path` substring — generic over the file-card kinds, never special-casing tool names.
-
 ## Alternatives considered
 
 - **Delete tool-owned presentation entirely** — [the rejected collapse proposal](../../rejected/simplification/2026-06-20-generic-tool-rendering.md); its own verdict deferred to exactly this union once two real tools and two real consumers existed, and that bar is now met.
@@ -76,5 +74,4 @@ A new render intent is a compile-breaking change at the bridge switch — delibe
 
 - Supersedes the deferral in [Collapse tool-owned UI presentation](../../rejected/simplification/2026-06-20-generic-tool-rendering.md) (rejected — "wait for two real tools and two real consumers, then a tagged render-intent union"). That bar is now met; this is that union.
 - Extended by [Result-time applied-hunk diffs](2026-07-02-result-time-applied-hunk-diffs.md), which adds a persisted `meta` channel so write/edit emit a result-time `DiffResultView` — the applied change (a contextual hunk with context lines / one per `replace_all` site, or a whole-file diff for a create) — on top of this union's call-time diff card.
-- Folds `ToolTerminal` into the `terminal` views described by [ACP terminal and tool-call rendering](../feature/2026-06-18-acp-terminal-and-tool-rendering.md) (the `_meta` terminal-card convention and capability gate are unchanged; only the harness-side presentation type changes).
-- The ACP SDK's `Diff` / `ToolCallContent` types back the new `diff` card.
+- Folds `ToolTerminal` into the tagged `terminal` views used by current UI transports.
diff --git a/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.i18n.yaml
index b76ed1a9ae..1ab141230b 100644
--- a/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-10-single-file-executable-sdk-runtime-distribution.md: 43ba5708d1216c37a7ad7e2904df7d2a6baf016d
-2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md: 3b33ff870d745584d2988bb6a7eb1a31e56ec3da
+2026-07-10-single-file-executable-sdk-runtime-distribution.md: 39cfb2999dea7767a18702ad7d160c9e88d7bf20
+2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md: e1a21c40647e1418d4afd02c0bc6b44ef0d4a8cf
diff --git a/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md b/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md
index 43ba5708d1..39cfb2999d 100644
--- a/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md
+++ b/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md
@@ -25,7 +25,7 @@ Terminology reminder: pkg's `/snapshot` VFS has nothing to do with this repo's t
 
 ### The serving surface is a plugin: the two packages ui/jsonrpc + examples/jsonrpc-demo
 
-The deterministic protocol implementation (`server.ts` / `transport.ts`) lands as two packages on the existing `ui/acp` + `examples/acp-demo` pattern — the serving surface is itself a plugin:
+The deterministic protocol implementation (`server.ts` / `transport.ts`) lands as two packages on the existing `acp/acp` + `examples/acp-demo` pattern — the serving surface is itself a plugin:
 
 - [`packages/ui/jsonrpc`](../../../../packages/ui/jsonrpc/README.md) (`@deepseek-ai/dsh-jsonrpc`): the pure protocol plugin; on apply it mounts `HarnessSdkServer` plus a line-delimited JSON-RPC transport on the process stdio, with disposal through `ctx.effect()`. Whether to serve is decided by `cordis.yml`; a yml that does not mount it is a legitimate process that does not serve. Protocol-level exit belongs to the plugin (after answering the `shutdown` request it disposes its own fiber, then `exit(0)`; an HMR-style unload only stops the service without exiting the process).
 - [`packages/examples/jsonrpc-demo`](../../../../packages/examples/jsonrpc-demo/README.md) (`@deepseek-ai/dsh-jsonrpc-demo`): a thin app bin — `installFailLoud` + `loadEnv` + config discovery + `boot()` from [`dsh-app-boot`](../../../../packages/ui/app-boot/src/index.ts), done once boot completes; the server is brought up by the `dsh-jsonrpc` entry in the yml. Its only dependency is app-boot. Process-level exit belongs to the bin (stdin EOF/SIGTERM → dispose then 0, SIGINT → 130).
diff --git a/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md b/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md
index 3b33ff870d..e1a21c4064 100644
--- a/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md
@@ -25,7 +25,7 @@ exe 使用 [@yao-pkg/pkg](https://github.com/yao-pkg/pkg)（vercel/pkg 归档后
 
 ### 对外服务接口也是插件：ui/jsonrpc + examples/jsonrpc-demo 两包
 
-确定性协议实现（`server.ts` / `transport.ts`）按 `ui/acp` + `examples/acp-demo` 的既有模式落为两包——对外服务接口本身也是插件：
+确定性协议实现（`server.ts` / `transport.ts`）按 `acp/acp` + `examples/acp-demo` 的既有模式落为两包——对外服务接口本身也是插件：
 
 - [`packages/ui/jsonrpc`](../../../../packages/ui/jsonrpc/README.md)（`@deepseek-ai/dsh-jsonrpc`）：纯协议插件；执行 `apply` 时，在进程 stdio 上挂载 `HarnessSdkServer` 与按行传输的 JSON-RPC 层，资源释放走 `ctx.effect()`。是否提供服务由 `cordis.yml` 决定；未挂载该插件的配置会启动一个不提供此服务的合法进程。协议级退出归插件所有（应答 `shutdown` 请求后 dispose 自身 fiber，再调用 `exit(0)`；HMR 式卸载只停止服务，不退出进程）。
 - [`packages/examples/jsonrpc-demo`](../../../../packages/examples/jsonrpc-demo/README.md)（`@deepseek-ai/dsh-jsonrpc-demo`）：轻量应用入口——`installFailLoud` + `loadEnv` + 配置发现 + [`dsh-app-boot`](../../../../packages/ui/app-boot/src/index.ts) 的 `boot()`；`boot()` 完成后入口即完成，服务器由 `cordis.yml` 中的 `dsh-jsonrpc` 条目启动。它只依赖 `app-boot`。进程级退出归 `bin` 所有（stdin EOF/SIGTERM → dispose 后返回 0，SIGINT → 130）。
diff --git a/.agents/notes/implemented/architecture/2026-07-12-agent-scope-runtime-design.md b/.agents/notes/implemented/architecture/2026-07-12-agent-scope-runtime-design.md
index bc27d37268..78073277db 100644
--- a/.agents/notes/implemented/architecture/2026-07-12-agent-scope-runtime-design.md
+++ b/.agents/notes/implemented/architecture/2026-07-12-agent-scope-runtime-design.md
@@ -286,9 +286,9 @@ An ACP provider crosses a real process and wire boundary, so it retains validati
 
 Start resolves only after `initialize` and `newSession` succeed. Abort, spawn failure, RPC failure, or invalid startup response reaps the process before rejection. After readiness, result maps the ACP prompt outcome and streamed output; dispose requests cancellation, closes the connection, and awaits process exit through one memoized path.
 
-## Workflows and ACP UI: retain only independent async facts
+## Workflows and ACP processes: retain only independent async facts
 
-Worker and editor bridges need more state than same-process registries because messages, process death, and rendering can settle independently. Their state is organized around those real facts rather than duplicate cancellation protocols.
+Worker and child-process bridges need more state than same-process registries because messages, process death, and cleanup can settle independently. Their state is organized around those real facts rather than duplicate cancellation protocols.
 
 ### Workflow children are pending starts or published records
 
@@ -304,11 +304,11 @@ The workflow result records the first accepted terminal outcome according to the
 
 Public disposal claims its memoized promise before invoking callbacks. Worker death closes admission before processing any queued late child request, synthesizes missing lifecycle ends, and starts child/process cleanup without rewriting an outcome already claimed.
 
-### ACP prompt settlement does not depend on rendering success
+### ACP prompt settlement does not depend on update delivery
 
-The ACP UI correlates a prompt with its observed turn directly. It does not scan from a `logWatermark` or use session status as a second reconciliation oracle.
+The [automation-only ACP bridge](../simplification/2026-07-23-acp-automation-only-protocol.md) correlates one in-flight prompt with its observed user-message turn directly. It does not scan from a log watermark or use session status as a second reconciliation oracle.
 
-Prompt handling settles correlation in a `finally` around transcript rendering. A rendering failure can fail presentation, but it cannot skip prompt settlement or leave the session permanently in flight. Concurrent loads of the same persisted caller-supplied session ID remain excluded because that is a real persistence identity race, not a UUID collision concern.
+The session-event listener settles correlation from the matching `turn/end` even when a committed-message update cannot reach the client. Update delivery therefore cannot leave the session permanently in flight. ACP creates server-assigned fresh session ids and owns every resulting agent handle until connection teardown.
 
 ## Correctness enforcement
 
diff --git a/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.i18n.yaml
index b49506364b..46f0a1cd41 100644
--- a/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-12-scoped-layers-store.md: b850b6bcbb22401b386b4458b6d5c65a160c85cd
-2026-07-12-scoped-layers-store.zh.md: 8bfc0a0e8ec1e3de624ff8d9e48b7517833fc025
+2026-07-12-scoped-layers-store.md: c5186d1652bca617eed62ec02937f2d055ea727c
+2026-07-12-scoped-layers-store.zh.md: 3183811be553428ebcd8f59f15989c44d458b477
diff --git a/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md b/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md
index b850b6bcbb..c5186d1652 100644
--- a/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md
+++ b/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md
@@ -123,4 +123,4 @@ All seven facades keep validation and diagnostics in their owning registry and c
 - `dsh-scope` unit tests cover global construction, lazy scoped construction, non-creating reads, named merge order and shadowing, aggregate reclamation, factory and action failure cleanup, notification ordering and rollback, `notify: false`, effect labels, exact disposer identity, idempotent teardown, caller-owned duplicate errors, independent anonymous duplicates, live iterators, and drained-generation detachment.
 - Focused tool, system-prompt, and command suites cover restrictions, reserved transport handling, known/restrictable-name agreement, guard re-entrancy and self-replacement, validation order, exact diagnostics, section shadow-before-evaluate, provider snapshot membership, variable re-entrancy and self-replacement, contained command observers, frozen and sorted views, direct execution, and lifecycle disposal.
 - The scoped core-data type-equivalence check ties `ScopeLayer` documentation to its source declaration. Repository documentation, module-graph, build, hygiene, coverage, and built-artifact gates exercise the root export and package boundary.
-- Existing ACP, headless, and TUI keyless snapshots remain the regression boundary for tool schemas, prompt assembly, and human commands. The implementation does not update any expected transcript.
+- Existing ACP, headless, and TUI keyless snapshots remain the regression boundary for tool schemas and prompt assembly; TUI coverage owns human commands. The implementation does not update any expected transcript.
diff --git a/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.zh.md b/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.zh.md
index 8bfc0a0e8e..3183811be5 100644
--- a/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.zh.md
@@ -123,4 +123,4 @@ export class AnonymousEntries<V> {
 - `dsh-scope` 单元测试覆盖全局构造、专属层延迟构造、非创建式读取、命名合并顺序与遮蔽、聚合回收、工厂与 action 失败清理、通知顺序与回滚、`notify: false`、effect 标签、原始 disposer 身份、幂等拆除、调用方提供的重名错误、相同匿名值的独立登记、活迭代器，以及表清空后的 generation 脱离。
 - 工具、系统提示词和命令专项测试套件覆盖 restriction、保留传输处理、已知名称与可限制名称的一致性、guard 重入与自我替换、校验顺序、精确诊断、section 先遮蔽再求值、提供方快照成员关系、variable 重入与自我替换、隔离失败的命令观察者、冻结且有序的视图、直接执行和生命周期销毁。
 - 作用域核心数据的类型等价性检查将 `ScopeLayer` 文档与其源声明绑定。仓库级的文档、模块图、构建、hygiene、覆盖率与构建产物门禁会覆盖包根导出与包边界。
-- 现有 ACP（Agent Client Protocol）、headless 和 TUI 无密钥快照继续作为工具 schema、提示词组装和人类命令的回归边界。实现不会更新任何预期 transcript（文本记录）。
+- 现有 ACP（Agent Client Protocol）、headless 和 TUI 无密钥快照继续作为工具 schema 与提示词组装的回归边界；人类命令由 TUI 覆盖。实现不会更新任何预期 transcript（文本记录）。
diff --git a/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.i18n.yaml
index e83cfff95e..edec1d5969 100644
--- a/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-15-llm-model-catalog-and-acp-selection.md: 6cc8afc6c7431fbf3eb29fc358b432db4f72b529
-2026-07-15-llm-model-catalog-and-acp-selection.zh.md: 1cce7a58d0ec83dc01feaf72ccb61d294a78ddd5
+2026-07-15-llm-model-catalog-and-acp-selection.md: 88a86bfd3d2a190f756f091d9734f85f50312b2e
+2026-07-15-llm-model-catalog-and-acp-selection.zh.md: c9cc9c633864943b4395dea520cfcbf7b228a606
diff --git a/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.md b/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.md
index 6cc8afc6c7..88a86bfd3d 100644
--- a/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.md
+++ b/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.md
@@ -4,6 +4,8 @@ Status: implemented
 
 English | [中文](2026-07-15-llm-model-catalog-and-acp-selection.zh.md)
 
+> The catalog decision remains current. Per-session ACP model selection is superseded by [ACP as an automation-only protocol](../simplification/2026-07-23-acp-automation-only-protocol.md).
+
 ## Problem
 
 Provider-routed adapters let every request choose `provider + model`, but `LlmService` exposed only routing and streaming. A UI could not discover which providers were registered or which models an adapter was prepared to recommend. ACP clients therefore received no `model` session config option, so Zed, JetBrains, and VS Code integrations had no model list even though the request seam already supported runtime switching.
@@ -24,43 +26,22 @@ Catalog membership is advisory. It drives selectors and diagnostics but never ch
 
 `dsh-llm-pi-ai` maps the configured provider's installed `getModels(provider)` entries into the neutral catalog. Its existing request-time catalog lookup remains authoritative and still rejects unknown models with `UNKNOWN_MODEL`. `dsh-llm-deepseek` accepts an optional `models` config containing display entries, defaulting to `deepseek-v4-flash` and `deepseek-v4-pro`. An explicit list replaces those defaults and an empty list disables discovery. The entries improve selector UX for known public or private models, while every unlisted model id continues to pass through unchanged.
 
-### ACP session config option
+### ACP transport boundary
 
-The ACP bridge advertises one select with `id: model` and `category: model` in `session/new` and `session/load` when the session has a complete target whose provider is registered. Each opaque option value encodes the full provider/model pair. Models are grouped by provider when multiple non-empty provider groups exist; a single group is flattened for clients that render simple selects better.
-
-The session's current target is added to the displayed options when its adapter omits it. This preserves custom DeepSeek and private-endpoint models while keeping the adapter catalog advisory. A target with an unregistered provider is not advertised, and a model-less agent remains available to another `agent/request` supplier.
-
-`session/set_config_option` accepts only values from the current catalog snapshot and updates a target reference owned by that ACP session. No global `LlmService` or `AgentOptions` state changes, so concurrent sessions may select different providers and models. The existing permission select remains independent, and every response returns the complete refreshed option state.
-
-### Prompt/request consistency and durability
-
-Agent setup installs scoped `system-prompt/assemble` and `agent/request` listeners. Prompt assembly snapshots the selected pair once per step, overwrites the assembled `provider` and `model` variables after downstream prompt listeners, and the request listener applies that same snapshot after downstream request listeners. A selection during asynchronous assembly therefore starts on the next step rather than splitting prompt text from routing. Other call-config fields remain untouched.
-
-The request header remains the durable source of truth. When a selected target is actually used, the existing full `request/header` snapshot records it. `session/load` initializes the ACP selection from the folded last request header before falling back to bridge config. A selection that is never used by a request is intentionally in-memory only because it never became model-visible state.
-
-ACP's experimental `providers/*` capability is not used. That draft surface configures provider base URLs, protocols, and headers, including secrets; it does not enumerate models and would give the UI authority to rewrite deployment-owned adapter configuration.
+The ACP automation transport is not a catalog consumer. Its deployment config supplies one optional provider/model target for newly created agents, and it advertises no model selector or configuration-option interface. TUI, Web, SDK hosts, and other human-facing consumers may use the advisory catalog through their own interaction contracts.
 
 ## Alternatives considered
 
-**Return model strings only.** A model-only value loses the provider route and becomes ambiguous as soon as two providers expose the same id.
-
 **Make catalogs mandatory whitelists.** This conflicts with the hand-written adapter's arbitrary model pass-through and private deployments. The selected adapter already owns authoritative request validation.
 
-**Store selection in `AgentOptions` or `LlmService`.** Those are creation-wide or deployment-wide objects. Mutating them would couple concurrent ACP sessions and bypass the logged `agent/request` replacement path.
-
-**Persist a new model-selection session event immediately.** An unused UI selection has not affected a model request. Recording the existing request header when the target is consumed preserves the model-visible-if-and-only-if-logged rule without adding a second source of truth.
-
-**Use ACP `providers/*`.** That unstable API changes endpoint and authentication configuration rather than selecting a model for one session, and its lifecycle and secret-handling semantics do not match this feature.
-
 ## Consequences
 
 - Any adapter can expose a dynamic model list without leaking provider-library types into the core seam.
 - Catalog consumers must treat absence as “not advertised,” never “invalid request.”
-- pi-ai-backed ACP deployments automatically inherit the installed pi-ai provider catalogs; hand-written DeepSeek deployments list known choices explicitly and retain arbitrary model support.
-- ACP clients receive a standard stable model config option, with provider-aware values and per-session isolation.
-- Request headers remain compatible with the provider-routed session shape; no new JSONL event or format version is required.
-- A catalog read can be asynchronous. ACP reads a detached snapshot before creating or resuming an agent, so discovery failure cannot leave a partially published session.
+- pi-ai adapters expose their installed provider catalogs; hand-written DeepSeek deployments list known choices explicitly and retain arbitrary model support.
+- Human-facing catalog consumers own their selection interaction. ACP uses its fixed deployment target and does not widen the protocol with model discovery.
+- A catalog read can be asynchronous, and every caller receives detached values.
 
 ## Testing
 
-Unit coverage validates catalog detachment and malformed metadata, pi-ai and DeepSeek catalog projection, ACP provider grouping, custom-current insertion, invalid values, provider/model request routing, prompt-variable alignment, concurrent-session isolation, model-less fallback, and load restoration from the request header. The existing ACP transport suites verify that the additional config option does not change prompt, cancellation, replay, approval, or tool-rendering behavior.
+Unit coverage validates catalog detachment and malformed metadata plus pi-ai and DeepSeek catalog projection. ACP transport tests validate fixed provider/model forwarding independently of catalog discovery.
diff --git a/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.zh.md b/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.zh.md
index 1cce7a58d0..c9cc9c6338 100644
--- a/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.zh.md
@@ -4,6 +4,8 @@ Status: implemented
 
 [English](2026-07-15-llm-model-catalog-and-acp-selection.md) | 中文
 
+> 目录决策仍然有效。ACP 会话级模型选择已由 [ACP 作为仅面向自动化的协议](../simplification/2026-07-23-acp-automation-only-protocol.md)取代。
+
 ## 问题
 
 基于提供方路由的适配器允许每次请求选择 `provider + model`，但 `LlmService` 只暴露路由和流式调用。UI 无法发现已注册的提供方，也无法知道适配器愿意推荐哪些模型。因此，ACP 客户端收不到 `model` 会话配置项；即使请求接缝已经支持运行时切换，Zed、JetBrains 和 VS Code 集成仍没有模型列表。
@@ -14,9 +16,9 @@ ACP 选择还必须保留提供方维度。同一个模型 ID 可能存在于多
 
 ## 决策
 
-### 提供方中立的建议性发现
+### 提供方无关的建议性发现
 
-`LlmAdapter` 增加 `providerInfo(provider)` 与异步 `listModels(provider)` 方法。其提供方中立结果分别为 `LlmProviderInfo { id, name }` 和 `LlmModelInfo { provider, id, name, description? }`。默认实现以路由名称作为提供方名称，并且不展示模型，从而保持现有适配器行为。
+`LlmAdapter` 增加 `providerInfo(provider)` 与异步 `listModels(provider)` 方法。其提供方无关结果分别为 `LlmProviderInfo { id, name }` 和 `LlmModelInfo { provider, id, name, description? }`。默认实现以路由名称作为提供方名称，并且不展示模型，从而保持现有适配器行为。
 
 `LlmService.listProviders()` 按注册顺序返回分离后的元数据。`LlmService.listModels(provider)` 委托给路由所有者，校验非空 ID 和名称，并在提供方不匹配或模型 ID 重复时以 `INVALID_CATALOG` 失败，最后返回分离后的值。未知提供方仍以 `NO_ADAPTER` 失败。提供方元数据在 `registerAdapter()` 期间进行原子校验，错误展示记录不会留下部分注册。
 
@@ -24,43 +26,22 @@ ACP 选择还必须保留提供方维度。同一个模型 ID 可能存在于多
 
 `dsh-llm-pi-ai` 将已配置提供方的安装目录 `getModels(provider)` 映射为中立目录。其现有请求时目录查询仍是权威依据，未知模型仍以 `UNKNOWN_MODEL` 失败。`dsh-llm-deepseek` 接受可选的 `models` 配置作为展示条目，默认包含 `deepseek-v4-flash` 和 `deepseek-v4-pro`。显式列表会替换这些默认值，空列表则关闭发现。这些条目改善已知公开或私有模型的选择体验，而所有未列出的模型 ID 仍会原样透传。
 
-### ACP 会话配置项
+### ACP 传输边界
 
-当会话具有完整目标且目标提供方已注册时，ACP bridge 会在 `session/new` 与 `session/load` 中展示一个 `id: model`、`category: model` 的选择项。每个不透明选项值都编码完整的提供方/模型字段组合。存在多个非空提供方分组时按提供方分组；只有一个分组时将其展开，以便对简单选择器支持更好的客户端展示。
-
-如果适配器目录未包含会话当前目标，该目标仍会加入展示选项。这能保留自定义 DeepSeek 与私有端点模型，同时维持目录的建议性。提供方未注册的目标不会展示；缺少模型的 agent 仍可由其他 `agent/request` 提供者补齐。
-
-`session/set_config_option` 只接受当前目录快照中的值，并更新该 ACP 会话独占的目标引用。它不会修改全局 `LlmService` 或 `AgentOptions` 状态，因此并发会话可以选择不同的提供方和模型。现有权限选择项保持独立，每次响应都返回完整的刷新后配置项状态。
-
-### Prompt/请求一致性与持久化
-
-Agent setup 会安装作用域内的 `system-prompt/assemble` 与 `agent/request` 监听器。Prompt 组装为每个 step 只快照一次选中的字段组合，在下游 prompt 监听器完成后覆盖组装结果中的 `provider` 与 `model` 变量；请求监听器则在下游请求监听器完成后应用同一个快照。因此，异步组装期间发生的选择会从下一个 step 生效，不会导致 prompt 文本与路由分裂。其他调用配置字段保持不变。
-
-请求头仍是持久化事实来源。当选中目标被实际使用时，现有的完整 `request/header` 快照会记录它。`session/load` 先从折叠后的最后请求头初始化 ACP 选择，再回退到 bridge 配置。一个从未被请求使用的选择只保留在内存中，因为它从未成为模型可见状态。
-
-本功能不使用 ACP 的实验性 `providers/*` 能力。该草案接口配置提供方 base URL、协议和 headers，其中可能包含密钥；它不枚举模型，并且会赋予 UI 改写部署所有的适配器配置的权力。
+ACP 自动化传输层不是目录消费方。它通过部署配置为新创建的 agent 提供一个可选的提供方／模型目标，不展示模型选择器或配置选项接口。TUI、Web、SDK host 和其他面向人类的消费方可以通过各自的交互契约使用该建议性目录。
 
 ## 考虑过的替代方案
 
-**只返回模型字符串。** 仅模型值会丢失提供方路由；两个提供方暴露相同 ID 时立刻产生歧义。
-
 **将目录设为强制白名单。** 这与手写适配器的任意模型透传和私有部署冲突。请求的权威校验本就属于被选中的适配器。
 
-**将选择存入 `AgentOptions` 或 `LlmService`。** 这些对象分别面向创建过程或整个部署。修改它们会耦合并发 ACP 会话，并绕开带日志归因的 `agent/request` 替换路径。
-
-**立即写入新的模型选择会话事件。** 尚未使用的 UI 选择没有影响模型请求。目标被消费时记录现有请求头，既满足“模型可见当且仅当已记录”的规则，也不会引入第二个事实来源。
-
-**使用 ACP `providers/*`。** 该不稳定 API 用于修改端点与认证配置，而不是为单个会话选择模型；其生命周期和密钥处理语义都不适合本功能。
-
 ## 结果
 
 - 任意适配器都能暴露动态模型列表，无需把提供方库类型泄漏到核心接缝。
 - 目录消费者必须把缺失理解为“未展示”，而不是“请求无效”。
-- 基于 pi-ai 的 ACP 部署会自动继承已安装的 pi-ai 提供方目录；手写 DeepSeek 部署显式列出已知选项，同时保留任意模型能力。
-- ACP 客户端会收到稳定标准的模型配置项，其中的值保留提供方信息，并按会话隔离。
-- 请求头继续使用基于提供方路由的会话结构；不需要增加 JSONL 事件或格式版本。
-- 目录读取可以是异步的。ACP 在创建或恢复 agent 前读取分离后的快照，因此发现失败不会留下部分发布的会话。
+- pi-ai 适配器会暴露其已安装的提供方目录；手写 DeepSeek 部署显式列出已知选项，同时保留对任意模型的支持。
+- 面向人类的目录消费方拥有各自的选择交互。ACP 使用固定部署目标，不会为模型发现扩大协议范围。
+- 目录读取可以是异步的，且每个调用方都会收到分离后的值。
 
 ## 测试
 
-单元测试覆盖目录分离与错误元数据、pi-ai 和 DeepSeek 目录投影、ACP 提供方分组、自定义当前模型补入、无效值、提供方/模型请求路由、prompt 变量一致性、并发会话隔离、无模型回退，以及从请求头恢复选择。现有 ACP 传输测试验证新增配置项不会改变 prompt、取消、回放、审批或工具展示行为。
+单元测试覆盖目录分离与错误元数据，以及 pi-ai 和 DeepSeek 目录投影。ACP 传输测试独立验证固定提供方／模型的转发行为。
diff --git a/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.i18n.yaml
index 70b98f0cf1..005f23b151 100644
--- a/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-15-lsp-capability-seam.md: 7265b04ac9b2f83764bdd13f07b2d3404c4c1708
-2026-07-15-lsp-capability-seam.zh.md: 10e8956005045d0934dd9dada5718b85a34cda3f
+2026-07-15-lsp-capability-seam.md: d96b3a9c5139c1455a51f4fff793293d7b5a11c0
+2026-07-15-lsp-capability-seam.zh.md: 54dd32e46dded5722dda910e9138879d3f99de07
diff --git a/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.md b/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.md
index 7265b04ac9..d96b3a9c51 100644
--- a/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.md
+++ b/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.md
@@ -18,7 +18,7 @@ Add LSP as a three-package capability seam with one read-only model tool and one
 
 1. `@deepseek-ai/dsh-lsp` at `packages/lsp/lsp` owns `ctx.lsp`, provider registration and selection, normalized requests/results, execution control, and structured LSP errors.
 2. `@deepseek-ai/dsh-lsp-local` at `packages/lsp/lsp-local` adapts configured stdio language servers to the seam. One plugin instance accepts a named server table and registers one isolated provider for each command and extension-to-language-id mapping.
-3. `@deepseek-ai/dsh-tool-lsp` at `packages/lsp/tool-lsp` owns the model-facing `lsp` schema, prompt guidance, argument validation, result limits and formatting, and ACP presentation.
+3. `@deepseek-ai/dsh-tool-lsp` at `packages/lsp/tool-lsp` owns the model-facing `lsp` schema, prompt guidance, argument validation, result limits and formatting, and transport-neutral UI presentation.
 
 `dsh-lsp-local` is a generic host, not a language-server catalog or installer. Deployments explicitly configure commands and mappings; future presets belong in composition plugins or `cordis.yml` overlays.
 
@@ -100,7 +100,7 @@ The tool requires `workspaceRoot` from session `header.cwd`, with no fallback; a
 
 Locations render as stable, file-grouped `path:line:character` entries. A `file:` URI accepted by Node `fileURLToPath()` becomes a relative path inside the workspace or an absolute path outside it; other URIs remain verbatim. `maxLocations` defaults to `100` and reports omitted items; `maxResultChars` defaults to `16_000` and bounds every complete rendered result, including its truncation metadata. Empty locations and `null` hover are successful no-result responses; missing or malformed server payloads fail with structured `LSP_MALFORMED_RESPONSE` errors.
 
-ACP uses `{ card: 'generic', kind: 'search', title, locations: [{ path: file_path, line }] }` with an args-derived operation/cursor `title`. Because `FileLocation` has no character, follow-along focuses the input line while the title preserves the cursor; presentation remains pure.
+The transport-neutral presenter uses `{ card: 'generic', kind: 'search', title, locations: [{ path: file_path, line }] }` with an args-derived operation/cursor `title`. Because `FileLocation` has no character, follow-along focuses the input line while the title preserves the cursor; presentation remains pure.
 
 ## Timeout ownership
 
@@ -174,7 +174,7 @@ The local provider trusts its configured server and claims no sandbox confinemen
 ## Testing
 
 - Package tests pin the three-package dependency direction, runtime injections, and `ctx.lsp`-only communication.
-- Tool tests pin the four operations, coordinate validation, configured bounds and omission markers, prompt, and ACP presentation.
+- Tool tests pin the four operations, coordinate validation, configured bounds and omission markers, prompt, and UI presentation.
 - Registry tests pin atomic reservation/release, order-independent selection, and structured unavailable, disposed, conflict, and unsupported-operation errors.
 - Fake-stdio tests pin exact initialization capabilities, four protocol mappings, `Location`/`LocationLink` and hover normalization, and `findReferences` mapping to `references.includeDeclaration`.
 - Synchronization tests pin UTF-16 negotiation and conversion, supported and rejected `textDocumentSync` forms, blocked and failed open writes, balanced transient open/close, close-write failure, and malformed-response rejection.
@@ -182,7 +182,7 @@ The local provider trusts its configured server and claims no sandbox confinemen
 - Lifecycle tests pin startup single-flight, complete-lifecycle serialization with fresh queued source reads, cross-workspace parallelism, abortable queues, crash replacement without replay, failed-stdin teardown, and quiescent disposal.
 - Host-filesystem tests pin session-cwd requirements, relative and absolute source containment through symlinks, document validation, file/non-file URI rendering, unformatted source, and no `fs/observed` event.
 - A keyless pinned TypeScript real-server e2e exercises all four operations; runnable configuration uses the same explicit provider mapping.
-- Snapshots cover model-visible schema, prompt, results, omissions, and ACP rendering; a built-artifact smoke test covers framing and cleanup.
+- Snapshots cover model-visible schema, prompt, results, and omissions; a built-artifact smoke test covers framing and cleanup.
 - Package and architecture docs cover configuration, security boundaries, and search/read guidance; the new `packages/lsp/` group is added to the AGENTS.md repository-layout block, the packages/README.md group table, and architecture.md in the same change.
 
 ## Consequences
diff --git a/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.zh.md b/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.zh.md
index 10e8956005..54dd32e46d 100644
--- a/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-15-lsp-capability-seam.zh.md
@@ -18,7 +18,7 @@ harness 已具备文本搜索与文件读取能力，但二者都无法识别程
 
 1. `packages/lsp/lsp` 下的 `@deepseek-ai/dsh-lsp` 负责 `ctx.lsp`、提供方注册与选择、标准化请求与结果、执行控制，以及结构化 LSP 错误。
 2. `packages/lsp/lsp-local` 下的 `@deepseek-ai/dsh-lsp-local` 将配置的 stdio 语言服务器适配到该服务边界。一个插件实例接收具名服务器表，并为每组命令及扩展名到语言 id 的映射注册一个隔离的提供方。
-3. `packages/lsp/tool-lsp` 下的 `@deepseek-ai/dsh-tool-lsp` 负责面向模型的 `lsp` schema、提示词指导、参数校验、结果限制与格式化，以及 ACP（Agent Client Protocol）展示。
+3. `packages/lsp/tool-lsp` 下的 `@deepseek-ai/dsh-tool-lsp` 负责面向模型的 `lsp` schema、提示词指导、参数校验、结果限制与格式化，以及与传输方式无关的 UI 展示。
 
 `dsh-lsp-local` 是通用 host，不是语言服务器目录或安装器。部署显式配置命令与映射；未来 preset 属于组合插件或 `cordis.yml` overlay。
 
@@ -100,7 +100,7 @@ interface LspToolInput {
 
 位置按文件稳定分组并渲染为 `path:line:character`。Node `fileURLToPath()` 可接受的 `file:` URI 在工作区内转换为相对路径，在工作区外转换为绝对路径；其他 URI 保持原样。`maxLocations` 默认值为 `100`，并报告省略的条目；`maxResultChars` 默认值为 `16_000`，并限制每个完整渲染结果，其中包括截断元数据。空位置与 `null` hover 是成功的无结果响应；服务器载荷缺失或格式错误时，以结构化 `LSP_MALFORMED_RESPONSE` 错误失败。
 
-ACP 使用 `{ card: 'generic', kind: 'search', title, locations: [{ path: file_path, line }] }`，`title` 由参数推导并标明操作与光标。由于 `FileLocation` 没有 character，跟随位置聚焦输入行，标题保留完整光标；展示保持纯函数。
+与传输方式无关的展示器使用 `{ card: 'generic', kind: 'search', title, locations: [{ path: file_path, line }] }`，`title` 由参数推导并标明操作与光标。由于 `FileLocation` 没有 character，跟随位置聚焦输入行，标题保留完整光标；展示保持纯函数。
 
 ## 超时归属
 
@@ -174,7 +174,7 @@ ACP 使用 `{ card: 'generic', kind: 'search', title, locations: [{ path: file_p
 ## 测试
 
 - 包测试固定三个包的依赖方向、运行时注入和仅通过 `ctx.lsp` 通信的边界。
-- 工具测试固定四种操作、坐标校验、配置限制与省略标记、提示词和 ACP 展示。
+- 工具测试固定四种操作、坐标校验、配置限制与省略标记、提示词和 UI 展示。
 - 注册表测试固定原子占用/释放、不受顺序影响的选择，以及结构化的不可用、已释放、冲突和不支持操作错误。
 - 测试用 stdio server 固定精确的初始化能力、四种协议映射、`Location`/`LocationLink` 与 `hover` 归一化，以及 `findReferences` 到 `references.includeDeclaration` 的映射。
 - 同步测试固定 UTF-16 协商与转换、受支持和被拒绝的 `textDocumentSync` 形式、打开写入阻塞与失败、配对的临时打开/关闭、关闭写入失败和错误响应拒绝。
@@ -182,7 +182,7 @@ ACP 使用 `{ card: 'generic', kind: 'search', title, locations: [{ path: file_p
 - 生命周期测试固定启动 single-flight、完整生命周期串行化及排队查询读取最新源文件、跨工作区并行、可取消队列、崩溃后不重放的替换、stdin 失败后的进程拆除，以及释放后完全停稳。
 - 主机文件系统测试固定 session cwd 要求、符号链接下相对与绝对源路径的规范 containment、文档校验、file/non-file URI 渲染、无格式源文本和不发送 `fs/observed`。
 - 无密钥且固定版本的 TypeScript 真实服务器 e2e 覆盖四种操作；可运行配置使用同一项显式提供方映射。
-- 快照覆盖模型可见 schema、提示词、结果、省略提示和 ACP 渲染；构建产物冒烟测试覆盖分帧与清理。
+- 快照覆盖模型可见 schema、提示词、结果和省略提示；构建产物冒烟测试覆盖分帧与清理。
 - 包与架构文档覆盖配置、安全边界和搜索/读取指导；同一改动中，新的 `packages/lsp/` 包组要加入 AGENTS.md 的仓库布局块、packages/README.md 的分组表和 architecture.md。
 
 ## 影响
diff --git a/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.i18n.yaml
index d218c2a0b2..0b599bc639 100644
--- a/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-22-tui-interactive-extension-service.md: 82e7c751b6e5b7500f9f7d7004fda8b905dccabb
-2026-07-22-tui-interactive-extension-service.zh.md: d7340e3f5dcf45e95b2d6e15ce3fc33726a555ae
+2026-07-22-tui-interactive-extension-service.md: 86cb39748358882d26766467d08f4f43510c1cc2
+2026-07-22-tui-interactive-extension-service.zh.md: d53f526a07b20fcff7086a1f501558d23e7eea8a
diff --git a/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.md b/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.md
index 82e7c751b6..86cb397483 100644
--- a/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.md
+++ b/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.md
@@ -28,7 +28,7 @@ Manager tests pin FIFO admission, cancellation, repeated close, shutdown outcome
 
 **Expose pi-tui objects directly.** This gives plugins maximum freedom but makes private focus, rendering, and teardown state a public compatibility contract. It also cannot arbitrate independently loaded overlays.
 
-**Put interactive callbacks on command definitions.** Commands are shared by TUI and ACP and remain useful without a terminal. Adding terminal state to `ctx.commands` would couple discovery and dispatch to one presentation implementation.
+**Put interactive callbacks on command definitions.** Commands remain transport-neutral domain entries even though TUI is their only shipped consumer. Adding terminal state to `ctx.commands` would couple discovery and dispatch to one presentation implementation.
 
 **Create a complete TUI slot and action framework at once.** Actions, editor replacement, transcript renderers, status regions, and completion providers have different composition and conflict rules. Shipping them behind one broad API would freeze those rules before a concrete consumer proves them.
 
diff --git a/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.zh.md b/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.zh.md
index d7340e3f5d..d53f526a07 100644
--- a/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-22-tui-interactive-extension-service.zh.md
@@ -28,7 +28,7 @@ Cordis 插件可以通过 `ctx.commands` 注册用户命令，但需要终端交
 
 **直接暴露 pi-tui 对象。** 这会赋予插件最大的自由度，却会把私有的焦点、渲染与拆卸状态变成公开兼容性契约，也无法在独立加载的浮层之间进行仲裁。
 
-**在命令定义中加入交互回调。** 命令由 TUI 与 ACP 共享，即使没有终端也仍然有用。向 `ctx.commands` 添加终端状态，会让发现与分派流程耦合到某一种呈现实现。
+**在命令定义中加入交互回调。** 命令仍是传输无关的领域条目，尽管 TUI 是唯一已交付的消费方。向 `ctx.commands` 添加终端状态，会让发现与分派流程耦合到某一种呈现实现。
 
 **一次性建立完整的 TUI slot 与 action 框架。** action、编辑器替换、transcript 渲染器、状态区域和补全提供方具有不同的组合规则与冲突规则。在具体消费方验证这些规则之前就将其纳入一个宽泛 API，会过早固化这些规则。
 
diff --git a/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.i18n.yaml b/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.i18n.yaml
index 8453907b5c..bf8f19a570 100644
--- a/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.i18n.yaml
+++ b/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-20-code-mode-result-card-completeness.md: 03c14cd780832fa03977dade2c7d14feb0399369
-2026-07-20-code-mode-result-card-completeness.zh.md: 45047cc5bcb8b74668702302077ff91fd3ff6bdc
+2026-07-20-code-mode-result-card-completeness.md: 97cd9d722e8252b956e16da03c3b8418451350f3
+2026-07-20-code-mode-result-card-completeness.zh.md: fea162b073e3473f7a07d4bf054408d28851fea9
diff --git a/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.md b/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.md
index 03c14cd780..97cd9d722e 100644
--- a/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.md
+++ b/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.md
@@ -6,7 +6,7 @@ English | [中文](2026-07-20-code-mode-result-card-completeness.zh.md)
 
 ## Problem
 
-The outer `run_code` tool persisted complete rendered content, but its editor presenter ignored that content and rebuilt the card body from a logs-only `presentationMeta` projection. A result-only run appeared correct because an empty presenter body let ACP and TUI fall back to `tool/result.content`. Once the program emitted a log, the presenter supplied non-empty content, that fallback stopped, and the returned value disappeared from the completed card. A spill policy's final head/tail preview was vulnerable to the same split ownership whenever captured logs made the stale projection non-empty.
+The outer `run_code` tool persisted complete rendered content, but its UI presenter ignored that content and rebuilt the card body from a logs-only `presentationMeta` projection. A result-only run appeared correct because an empty presenter body let consumers fall back to `tool/result.content`. Once the program emitted a log, the presenter supplied non-empty content, that fallback stopped, and the returned value disappeared from the completed card. A spill policy's final head/tail preview was vulnerable to the same split ownership whenever captured logs made the stale projection non-empty.
 
 Nested Code calls never owned cards, so producing metadata for the outer call solely to reconstruct one incomplete card also obscured the intended one-card boundary.
 
@@ -22,7 +22,7 @@ Nested dispatch remains unchanged. Calls marked by `exec.parent` emit bounded `t
 
 Tool unit coverage drives logs-only, result-only, logs-plus-result, no-output, spilled-result, and failure outcomes through the canonical registry, then pins the durable content and absence of a result presenter. A host-mux regression uses a call-only presenter to prove the result frame carries raw content exactly once and no view. These cases prove stale metadata cannot replace final content without making the host duplicate that content.
 
-The keyless ACP and TUI Code Mode snapshots execute one outer program that performs two nested bash calls, logs `captured output`, and returns `CODE_ONE+CODE_TWO`. Both surfaces show one completed outer card containing both lines and no nested cards.
+The keyless ACP backend and TUI Code Mode snapshots execute one outer program that performs two nested bash calls, logs `captured output`, and returns `CODE_ONE+CODE_TWO`. The persisted ACP log pins the complete result; the TUI surface shows one completed outer card containing both lines and no nested cards.
 
 ## Alternatives considered
 
@@ -30,10 +30,10 @@ The keyless ACP and TUI Code Mode snapshots execute one outer program that perfo
 
 **Merge presenter metadata with `result.content`.** Rejected because the rendered content already contains the logs; merging would duplicate them and require brittle deduplication.
 
-**Forward `result.content` through a generic result presenter.** Rejected because the durable event already carries that content and ACP/TUI already have a generic raw-content fallback. The host mux serializes a tool-owned result view beside the event, so forwarding would duplicate the rendered content in one frame merely to recreate the fallback; the default worker alone admits a 64 MiB variable-payload budget before rendering.
+**Forward `result.content` through a generic result presenter.** Rejected because the durable event already carries that content and UI consumers already have a generic raw-content fallback. The host mux serializes a tool-owned result view beside the event, so forwarding would duplicate the rendered content in one frame merely to recreate the fallback; the default worker alone admits a 64 MiB variable-payload budget before rendering.
 
 **Create one card per nested dispatch.** Rejected because intermediate values are intentionally execution-local and never model-facing. Multiple cards would expose an implementation trace instead of the single Code Mode operation the model and user invoked.
 
 ## Consequences
 
-ACP and TUI display the same complete content the model receives and replay persists, including post-policy spill previews, through their generic result fallback. The host API retains the pending program title without duplicating the raw result in a separate view payload. New `run_code` results no longer carry the optional logs metadata, but this requires no session-format bump: existing records remain valid because presentation reads their durable rendered content.
+TUI and JSON-RPC/Web display the same complete content the model receives and replay persists, including post-policy spill previews, through their generic result fallback. The host API retains the pending program title without duplicating the raw result in a separate view payload. New `run_code` results no longer carry the optional logs metadata, but this requires no session-format bump: existing records remain valid because presentation reads their durable rendered content.
diff --git a/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.zh.md b/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.zh.md
index 45047cc5bc..fea162b073 100644
--- a/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.zh.md
+++ b/.agents/notes/implemented/bug-fix/2026-07-20-code-mode-result-card-completeness.zh.md
@@ -6,7 +6,7 @@ Status: implemented
 
 ## 问题
 
-外层 `run_code` 工具会持久化完整的渲染内容，但编辑器的卡片展示逻辑忽略了这些内容，转而根据仅含日志的 `presentationMeta` 投影重新构建卡片正文。仅有结果的运行看似正确，是因为展示逻辑未提供正文时，ACP 和 TUI 会回退到 `tool/result.content`。只要程序输出一条日志，展示逻辑就会提供非空内容，回退随即停止，返回值便会从完成态卡片中消失。当已捕获的日志使陈旧投影变为非空时，输出落盘策略最终生成的头尾预览也会受到同一职责拆分的影响。
+外层 `run_code` 工具会持久化完整的渲染内容，但其 UI 展示器忽略了这些内容，转而根据仅含日志的 `presentationMeta` 投影重新构建卡片正文。仅有结果的运行看似正确，是因为展示器正文为空时，消费方会回退到 `tool/result.content`。只要程序输出一条日志，展示器就会提供非空内容，回退随即停止，返回值便会从完成态卡片中消失。当已捕获的日志使陈旧投影变为非空时，输出落盘策略最终生成的头尾预览也会受到同一职责拆分的影响。
 
 嵌套 Code 调用从不生成自己的卡片。因此，仅仅为了重建这一张不完整卡片而给外层调用生成元数据，还掩盖了每次外层调用只生成一张卡片的预期边界。
 
@@ -22,7 +22,7 @@ Status: implemented
 
 工具单元测试通过规范注册表覆盖仅有日志、仅有结果、日志与结果并存、无输出、结果落盘和失败的结果，然后固定持久内容以及结果展示器不存在这一事实。宿主 mux 回归测试使用仅有调用的展示器，证明结果帧恰好携带一次原始内容，且不含视图。这些案例证明陈旧元数据无法替换最终内容，同时不会让宿主重复该内容。
 
-无密钥的 ACP 与 TUI Code Mode 快照会执行一个外层程序：程序进行两次嵌套 bash 调用，记录 `captured output`，并返回 `CODE_ONE+CODE_TWO`。两个界面都只显示一张完成态外层卡片，其中包含这两行内容，且没有嵌套卡片。
+无密钥的 ACP（Agent Client Protocol）后端快照与 TUI Code Mode 快照会执行一个外层程序：程序进行两次嵌套 bash 调用，记录 `captured output`，并返回 `CODE_ONE+CODE_TWO`。ACP 持久化日志固定完整结果；TUI 界面只显示一张完成态外层卡片，其中包含这两行内容，且没有嵌套卡片。
 
 ## 备选方案
 
@@ -30,10 +30,10 @@ Status: implemented
 
 **把展示元数据与 `result.content` 合并：**不予采纳。渲染内容已经包含日志；合并会造成重复，还需要依赖脆弱的去重逻辑。
 
-**通过通用结果展示器转发 `result.content`：**不予采纳。持久事件已经携带该内容，ACP 和 TUI 也已有通用的原始内容回退机制。宿主 mux 会在事件旁序列化工具拥有的结果视图，因此转发仅仅是为了重建该回退机制，却会在一个帧中重复渲染内容；仅默认 worker 在渲染前允许 64 MiB 的可变载荷预算。
+**通过通用结果展示器转发 `result.content`：**不予采纳。持久事件已经携带该内容，UI 消费方也已有通用的原始内容回退机制。宿主 mux 会在事件旁序列化工具拥有的结果视图，因此转发仅仅是为了重建该回退机制，却会在一个帧中重复渲染内容；仅默认 worker 在渲染前允许 64 MiB 的可变载荷预算。
 
 **为每次嵌套分发创建一张卡片：**不予采纳。中间值有意只存在于执行期间，永远不面向模型。多张卡片会暴露实现轨迹，而不是模型与用户调用的单次 Code Mode 操作。
 
 ## 影响
 
-ACP 和 TUI 通过通用结果回退机制显示与模型接收及回放持久化相同的完整内容，其中包括 post-policy 输出落盘预览。宿主 API 保留待完成的程序标题，同时不在单独的视图负载中重复原始结果。新的 `run_code` 结果不再携带可选的日志元数据，但无需提升会话格式版本：现有记录仍然有效，因为展示逻辑会读取其中持久化的渲染内容。
+TUI 与 JSON-RPC／Web 通过通用结果回退机制显示与模型接收及回放持久化相同的完整内容，其中包括 post-policy 输出落盘预览。宿主 API 保留待完成的程序标题，同时不在单独的视图负载中重复原始结果。新的 `run_code` 结果不再携带可选的日志元数据，但无需提升会话格式版本：现有记录仍然有效，因为展示逻辑会读取其中持久化的渲染内容。
diff --git a/.agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.md b/.agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.md
index 7c47fc78e9..908274532f 100644
--- a/.agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.md
+++ b/.agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.md
@@ -2,6 +2,8 @@
 
 Status: implemented
 
+> Superseded by [ACP as an automation-only protocol](../simplification/2026-07-23-acp-automation-only-protocol.md). This note records the retired editor-facing bridge design.
+
 ## Problem
 
 The harness originally exposed agents only through a readline loop. That surface could carry text, but it gave an editor no structured way to create or resume sessions, correlate prompt completion, stream reasoning and tool activity, render tool-specific UI, ask for permission, or cancel one conversation without disturbing another. ACP defines those interactions as JSON-RPC over stdio, and Zed is the target client used to make concrete compatibility decisions.
@@ -10,7 +12,7 @@ The bridge must preserve the harness's existing ownership boundaries. It cannot
 
 ## Decision
 
-`@deepseek-ai/dsh-acp` is a UI/client-driver plugin under `packages/ui/acp`. It uses `@agentclientprotocol/sdk`'s `AgentSideConnection` over stdin/stdout and programs only interface services: the agent create/resume factory, session persistence, tool registry, user interaction, and optional approval/bash capabilities. It does not change the agent loop and is not a capability-seam implementation.
+`@deepseek-ai/dsh-acp` was a UI/client-driver plugin in the former UI package group. It uses `@agentclientprotocol/sdk`'s `AgentSideConnection` over stdin/stdout and programs only interface services: the agent create/resume factory, session persistence, tool registry, user interaction, and optional approval/bash capabilities. It does not change the agent loop and is not a capability-seam implementation.
 
 The bridge implements the following stable session path:
 
@@ -30,7 +32,7 @@ The bridge also provides the ACP-backed `UserInteractionProvider`: `ask_user_que
 
 Lifecycle ownership is explicit. The bridge holds an `AgentHandle` per live session. Disconnect and Cordis disposal cancel pending prompts, dispose every handle in parallel, await loop quiescence and persistence flush, and then remove the records. Stream notification failures are contained so a vanished client cannot corrupt an agent turn. The ACP app composition loads no stdout logger; a test guards stdout as framed JSON-RPC only.
 
-The precise supported and deferred protocol rows live in [`packages/ui/acp/acp-feature-support.md`](../../../../packages/ui/acp/acp-feature-support.md); the package README is the operational contract.
+The current protocol contract lives in the [`dsh-acp` package README](../../../../packages/acp/acp/README.md).
 
 ## Alternatives considered
 
diff --git a/.agents/notes/implemented/feature/2026-06-14-acp-multi-session.md b/.agents/notes/implemented/feature/2026-06-14-acp-multi-session.md
index 91d85aeded..00b06f1e86 100644
--- a/.agents/notes/implemented/feature/2026-06-14-acp-multi-session.md
+++ b/.agents/notes/implemented/feature/2026-06-14-acp-multi-session.md
@@ -4,15 +4,15 @@ Status: implemented
 
 ## Problem
 
-An ACP editor can keep several conversations alive over one agent subprocess. A single-active-session bridge would force extra processes and would not match Zed's client model, which tracks multiple session ids and concurrent loads. Multiplexing introduces isolation risks: events, prompt completion, cancellation, permission prompts, config selections, and predictable background-task ids must never cross session boundaries.
+An ACP automation client can keep several conversations alive over one agent subprocess. A single-active-session bridge would force extra processes and prevent one parent controller from driving independent children over one connection. Multiplexing introduces isolation risks: committed answers, prompt completion, cancellation, permission requests, and predictable background-task ids must never cross session boundaries.
 
 ## Decision
 
-The ACP bridge stores live sessions in `Map<SessionId, SessionRecord>`. Agent-scoped callbacks use `ownedRecord`: look up `agent.session.id` in that forward map and accept the record only when it owns the exact agent object, so a foreign same-id object cannot claim the session. A record owns its agent handle, in-flight prompt, live tool-call presentation state, pending idle config switches, session cwd, and client capability snapshot. A separate loading-id set reserves each id before asynchronous resume so two pipelined loads cannot construct duplicate agents; distinct ids may load concurrently.
+The ACP bridge stores live sessions in `Map<SessionId, SessionRecord>`. Agent-scoped callbacks use `ownedRecord`: look up `agent.session.id` in that forward map and accept the record only when it owns the exact agent object, so a foreign same-id object cannot claim the session. A record owns its agent, exact disposer, and optional in-flight prompt with the durable turn number that eventually settles it. The session header owns its cwd; the bridge keeps no parallel workspace or client-capability state.
 
-Every `session/event` and `agent/status` callback resolves the owning record before sending or settling anything. Each session permits one in-flight prompt independently. The prompt records a log watermark, captures its own `turn/start`, and settles only on the matching `turn/end`; a late end from a cancelled prior turn cannot resolve a newer prompt. `session/cancel` addresses one record and calls only that agent's queue-aware cancel path.
+Every `session/event` callback resolves the owning record before sending or settling anything. Each session permits one in-flight prompt independently. The prompt captures its own user-sourced message `turn/start` and settles only on the matching `turn/end`; injection turns, autonomous plugin or goal turns, and a late end from a cancelled prior turn cannot resolve it. `session/cancel` addresses one record and calls only that agent's queue-aware cancel path.
 
-Permission ownership uses the same exact-agent check against the forward map. The ACP `approval/request` answerer prompts only the editor session that owns the requesting agent and delegates foreign requests. User-interaction elicitations likewise route by agent ownership. Per-session sandbox and approval config values fold only that session's events, with pending idle switches stored on that record until the next turn anchors them.
+Permission ownership uses the same exact-agent check against the forward map. The ACP `approval/request` answerer sends a one-shot machine-policy request only for the session that owns the requesting agent and delegates foreign or call-less requests. The bridge has no elicitation, config-selection, or other human-interaction state.
 
 Background bash tasks carry an opaque owner token equal to the owning session id. `bash_output` and `bash_kill` compare the caller's token with the executor's task ownership before reading or killing; a predictable task id alone grants no access. Ownership is stored with the executor task, so a tool plugin reload does not erase it.
 
@@ -22,13 +22,13 @@ Connection teardown clears the live map, settles each pending prompt as cancelle
 
 [ACP v1 expressly permits several concurrent sessions on one connection](https://github.com/agentclientprotocol/agent-client-protocol/blob/01beb5fb5eec60e9f516a80d85eb03594bac61e3/docs/get-started/architecture.mdx#L16-L24), and each new session carries its own primary `cwd`. This bridge implements that session-level multiplexing, including different primary workspaces as recorded by the [per-session cwd decision](../architecture/2026-07-02-fs-per-session-cwd.md); it does not create one agent subprocess per session.
 
-A multi-root project inside one session is a separate optional capability: ACP defines the [effective roots as the primary `cwd` plus `additionalDirectories`](https://github.com/agentclientprotocol/agent-client-protocol/blob/01beb5fb5eec60e9f516a80d85eb03594bac61e3/docs/protocol/v1/session-setup.mdx#L313-L367). [Zed sends the remaining project work directories only when the agent advertises that capability](https://github.com/zed-industries/zed/blob/ea77ca2818f3e059a2b61ecc7e63b67e01e1cec5/crates/agent_servers/src/acp.rs#L1139-L1145), otherwise it [drops them from the session request](https://github.com/zed-industries/zed/blob/ea77ca2818f3e059a2b61ecc7e63b67e01e1cec5/crates/agent_servers/src/acp.rs#L1454-L1472). The bridge does not advertise this capability and rejects non-empty values, as recorded in its [known limitations](../../../../packages/ui/acp/README.md#known-limitations-and-deferred-work), so a current Zed multi-root project reaches it with only the first work directory.
+A multi-root project inside one session is a separate optional capability: ACP defines the [effective roots as the primary `cwd` plus `additionalDirectories`](https://github.com/agentclientprotocol/agent-client-protocol/blob/01beb5fb5eec60e9f516a80d85eb03594bac61e3/docs/protocol/v1/session-setup.mdx#L313-L367). The automation bridge advertises no multi-root capability and rejects non-empty `additionalDirectories`; each fresh session has exactly one workspace, as recorded in the [package contract](../../../../packages/acp/acp/README.md#protocol-contract).
 
-[The standard transport is one editor-launched agent subprocess per stdio connection](https://github.com/agentclientprotocol/agent-client-protocol/blob/01beb5fb5eec60e9f516a80d85eb03594bac61e3/docs/protocol/v1/transports.mdx#L17-L42); multiple editor connections therefore require multiple subprocesses or a custom transport, while this decision guarantees multiple sessions within one connection. Within that connection, `ctx.sandboxPolicy` resolves every session's `cwd` as its own `workspace-write` root, so the shared bash and filesystem services can serve concurrent projects without granting cross-project writes. This does not add ACP `additionalDirectories`; it removes the process-wide root limit from the already-supported one-primary-root-per-session path.
+[The standard transport is one agent subprocess per stdio connection](https://github.com/agentclientprotocol/agent-client-protocol/blob/01beb5fb5eec60e9f516a80d85eb03594bac61e3/docs/protocol/v1/transports.mdx#L17-L42); multiple connections therefore require multiple subprocesses or a custom transport, while this decision guarantees multiple sessions within one connection. Within that connection, `ctx.sandboxPolicy` resolves every session's `cwd` as its own `workspace-write` root, so the shared bash and filesystem services can serve concurrent projects without granting cross-project writes. This does not add ACP `additionalDirectories`; it removes the process-wide root limit from the already-supported one-primary-root-per-session path.
 
 ## Alternatives considered
 
-**One live session per connection** — rejected. It adds process overhead and contradicts the target client's multi-session shape without removing multiplexing needs from the editor.
+**One live session per connection** — rejected. It adds process overhead and prevents a programmatic parent from multiplexing independently cancellable work.
 
 **A per-session `ctx.extend()`** — rejected. A child context does not by itself create a child plugin fiber, so listeners would still belong to the bridge fiber. The implemented bridge instead uses global listeners with explicit O(1) demultiplexing and per-session owned records; agent lifecycle is owned by `AgentHandle`.
 
@@ -36,10 +36,10 @@ A multi-root project inside one session is a separate optional capability: ACP d
 
 ## Consequences
 
-N sessions can stream, prompt, request permission, switch config, and run background tasks concurrently without interleaving or cross-settling. A cancel or dispose in one session does not affect its neighbors. The bridge pays for explicit maps and isolation tests, but it does not add one listener set per session and therefore avoids listener fan-out during long-lived connections.
+N sessions can return committed answers, prompt, request permission, and run background tasks concurrently without interleaving or cross-settling. A cancel in one session does not affect its neighbors. The bridge pays for explicit maps and isolation tests, but it does not add one listener set per session and therefore avoids listener fan-out during long-lived connections.
 
-The bridge still exposes no protocol method to close one live session independently. Today records leave together on connection teardown; session close/resume lifecycle capabilities remain deferred in the ACP feature checklist.
+The bridge exposes no protocol method to close one live session independently. Records leave together on connection teardown; navigation and resume belong to host APIs rather than this automation protocol.
 
 ## Verification
 
-The multi-session suite drives concurrent sessions through interleaved updates, independent in-flight prompts, targeted cancellation, same-id and distinct-id load races, permission routing, config isolation, and teardown. Tool-bash tests prove one session cannot read or kill another session's background task.
+The multi-session suite drives concurrent sessions through routed committed answers, independent in-flight prompts, targeted cancellation, permission routing, exact-agent rejection, and shared teardown. Tool-bash tests prove one session cannot read or kill another session's background task.
diff --git a/.agents/notes/implemented/feature/2026-06-15-code-mode.md b/.agents/notes/implemented/feature/2026-06-15-code-mode.md
index 0f5e8cc94b..7193e63e80 100644
--- a/.agents/notes/implemented/feature/2026-06-15-code-mode.md
+++ b/.agents/notes/implemented/feature/2026-06-15-code-mode.md
@@ -48,7 +48,7 @@ Under `'code'` and `'both'` the registry owns `run_code` as a reserved presentat
 
 **Concurrency is serialized.** Each run owns a dispatch queue, so even `Promise.all` executes tool calls in submission order. Settlement abandons queued calls that have not started. Parallelism requires per-tool concurrency-safety metadata.
 
-**Presentation.** `run_code`'s render intent is decided here per the [render-intent Agent Note](../architecture/2026-07-02-tool-render-intent-union.md): `presentCall` creates a `generic` card with `kind: 'execute'`, the program text as its title, and the same program text as `rawInput`; `run_code` intentionally declares no `presentResult`, so ACP and TUI complete that card through their generic raw-content fallback using the final durable `tool/result.content`, including captured logs plus the returned value, failure, or post-policy spill preview. The program is the title because ACP execute cards reliably render that field while some clients omit body and raw-input content. This is not a `terminal` card: that card's semantics are "a shell command in a working directory", which a program is not. See the [result-card completeness note](../bug-fix/2026-07-20-code-mode-result-card-completeness.md).
+**Presentation.** `run_code`'s render intent is decided here per the [render-intent Agent Note](../architecture/2026-07-02-tool-render-intent-union.md): `presentCall` creates a `generic` card with `kind: 'execute'`, the program text as its title, and the same program text as `rawInput`; `run_code` intentionally declares no `presentResult`, so TUI and JSON-RPC/Web complete that card through their generic raw-content fallback using the final durable `tool/result.content`, including captured logs plus the returned value, failure, or post-policy spill preview. This is not a `terminal` card: that card's semantics are "a shell command in a working directory", which a program is not. See the [result-card completeness note](../bug-fix/2026-07-20-code-mode-result-card-completeness.md).
 
 ### Observability: `tool/code-dispatch`
 
diff --git a/.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md b/.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md
index 8d9c0197eb..a586864fd2 100644
--- a/.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md
+++ b/.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md
@@ -2,6 +2,8 @@
 
 Status: implemented
 
+> Superseded for ACP by [ACP as an automation-only protocol](../simplification/2026-07-23-acp-automation-only-protocol.md). Tool render intents remain available to UI transports, but ACP no longer projects them into terminal cards.
+
 ## Problem
 
 The ACP bridge lets each tool own its call rendering via `presentCall`/`presentResult` (see [tool-call UI presentation](2026-06-14-acp-agent-client-protocol.md) and `packages/core/tools`). For `bash` we surface the exact command as the `tool_call` title, the model's `description` as a content text block, `kind: 'execute'`, and the completed output wrapped in a fenced ` ```console ` text block.
diff --git a/.agents/notes/implemented/feature/2026-06-25-ask-user-question.md b/.agents/notes/implemented/feature/2026-06-25-ask-user-question.md
index cd1a423499..4f6dc3e2d1 100644
--- a/.agents/notes/implemented/feature/2026-06-25-ask-user-question.md
+++ b/.agents/notes/implemented/feature/2026-06-25-ask-user-question.md
@@ -16,7 +16,7 @@ The model-facing request vocabulary is deliberately aligned with the product-res
 
 Providers return `{ answers: [{ id, selected, custom? }] }`. `selected` is always an array of selected option labels, so single-select and `multi_select` answers share one result shape. `custom` carries a free-text "Other" answer; optionless questions collect `custom` directly. When `custom` is present, it overrides any selected choices and `selected` is empty. A provider that supports partial completion represents a deliberately skipped item with the existing `{ id, selected: [] }` shape, preserving the other answers without extending the tool result vocabulary.
 
-`UserInteractionError` extends `HarnessError`, so failures such as `NO_PROVIDER`, `ASK_ABORTED`, ACP cancellation, or missing session routing survive `ctx.tools.execute()` as machine-routable `{ name, code }` tool errors. This matches the structured-error taxonomy and lets the model or a wrapping plugin distinguish "user cancelled" from a generic thrown exception.
+`UserInteractionError` extends `HarnessError`, so failures such as `NO_PROVIDER`, `ASK_ABORTED`, or missing request ownership survive `ctx.tools.execute()` as machine-routable `{ name, code }` tool errors. This matches the structured-error taxonomy and lets the model or a wrapping plugin distinguish "user cancelled" from a generic thrown exception.
 
 ## UI mappings
 
@@ -26,9 +26,7 @@ The Web composer shows one question at a time while retaining every request in t
 
 `dsh-tui` renders each question as a keyboard overlay, shows option descriptions, supports single- and multi-select choices plus free-form custom answers, and rejects pending questions on abort, provider disposal, or terminal shutdown. Batched and simultaneous requests are queued so one overlay owns keyboard focus at a time.
 
-`dsh-acp` provides the same seam for ACP sessions. It resolves the calling `Agent` through `ownedRecord`, requiring the forward session-map record at `agent.session.id` to own that exact agent object, and calls ACP `unstable_createElicitation` with a session-scoped form for each question. Single-select options become a `choice` string enum; `multi_select` options become a `choice` array enum; optionless questions use a required `custom` text field. If the client returns both `choice` and non-empty `custom`, the custom answer wins. ACP `decline`/`cancel`, a missing answer, a missing session, and a client without elicitation support all become structured `UserInteractionError`s.
-
-The ACP mapping deliberately uses elicitation, not `session/request_permission`. `request_permission` is still reserved for the separate permission gate: it is a yes/no-or-policy authorization protocol around tool execution. `ask_user_question` is a general information-gathering tool with optional free-form answers, so ACP form elicitation is the closer protocol fit. The bridge's session routing is shared with the future permission gate, but the user intent is different.
+The Web host exposes the same seam through its selected question provider. Stable request ids, whole-request cancellation, owner abort, per-item skips, and structured batch settlement keep browser interaction behind the provider-neutral service.
 
 ## Alternatives considered
 
@@ -36,18 +34,16 @@ The ACP mapping deliberately uses elicitation, not `session/request_permission`.
 
 **Core-owned ask-user packages.** The first implementation split the seam and the model-facing tool across `packages/core` and `packages/ui`, but both names describe one UI-backed human-interaction affordance. The seam remains provider-neutral, but it is not providerless core infrastructure like sessions, tools, or the agent registry. Keeping `dsh-user-interaction` and `dsh-tool-ask-user` together under `packages/ui` makes the package map match the product boundary: apps and bridges provide the human-answer provider, and the stdio app opts into the model-facing tool.
 
-**ACP `session/request_permission`.** Permission requests are authorization around tool execution; `ask_user_question` is information gathering with optional free-form answers. Using permission for general questions would collapse two different product concepts and make the future permission gate harder to reason about.
+**Use a permission request for general questions.** Permission requests authorize tool execution; `ask_user_question` gathers information with optional free-form answers. Reusing the permission channel would collapse two different product concepts.
 
 **A loop-level pause primitive.** The agent loop already knows how to await a tool call and resume from a tool result. Adding a new loop special case would duplicate that async shape and make every loop implementation learn about a UI concern.
 
 ## Consequences
 
-ACP elicitation is currently marked unstable in the SDK. The fallback is still structured: if a client does not implement it, the tool returns `ASK_FAILED` rather than hanging. A later ACP stabilization may rename or reshape the method; that migration should stay inside `dsh-acp` because the core `ctx.userInteraction` vocabulary is provider-neutral.
-
 The feature gives the model a powerful pause primitive, so prompt guidance matters. The tool description tells the model to ask concise questions and use options when possible. Product policy can later wrap `tools/execute` to restrict when the tool is allowed, but the loop should not special-case it.
 
-`dsh-user-interaction` and `dsh-tool-ask-user` both live in `packages/ui` because they form one product-facing human-interaction capability. `agent-core` does not load either the tool or a provider. `dsh-tui-demo` opts into the seam, TUI provider, and model-facing tool. `dsh web` boots the seam/provider in the host runtime and exposes the tool through the selected Web question plugin. `acp-agent` keeps only the `userInteraction` seam/provider by default: ACP elicitation support is still client-dependent, so an ACP leaf must opt into the model-facing tool deliberately once its client can complete elicitation requests.
+`dsh-user-interaction` and `dsh-tool-ask-user` both live in `packages/ui` because they form one product-facing human-interaction capability. `agent-core` does not load either the tool or a provider. `dsh-tui-demo` opts into the seam, TUI provider, and model-facing tool. `dsh web` boots the seam/provider in the host runtime and exposes the tool through the selected Web question plugin. The ACP automation app mounts neither the seam nor the tool.
 
 ## Testing
 
-Unit coverage pins provider registration/disposal, duplicate-provider rejection, abort-before-provider, empty-question rejection, structured tool errors through `ctx.tools.execute()`, batched answers, multi-select answers, custom answers, explicit per-item skips, and the model schema including the removal of `value`, `recommended`, `allow_custom`, and `desc`. TUI tests cover option descriptions, queued requests, shutdown/abort cleanup, optionless free-form input, invalid choices, duplicate multi-select selections, and batched question flows. ACP bridge tests drive a real in-memory ACP connection with the real `ask_user_question` tool and verify selected-option, custom-overrides-choice, multi-select, and optionless free-form elicitation paths continue the agent loop. Web tests pin stable-id replay, response validation, first-wins settlement, duplicate and late responses, whole-request cancellation versus owner abort, single-select advance, IME-safe Enter submission, per-item skip preservation, composer takeover, structured batch submission, and restoration of the normal composer.
+Unit coverage pins provider registration/disposal, duplicate-provider rejection, abort-before-provider, empty-question rejection, structured tool errors through `ctx.tools.execute()`, batched answers, multi-select answers, custom answers, explicit per-item skips, and the model schema including the removal of `value`, `recommended`, `allow_custom`, and `desc`. TUI tests cover option descriptions, queued requests, shutdown/abort cleanup, optionless free-form input, invalid choices, duplicate multi-select selections, and batched question flows. Web tests pin stable-id replay, response validation, first-wins settlement, duplicate and late responses, whole-request cancellation versus owner abort, single-select advance, IME-safe Enter submission, per-item skip preservation, composer takeover, structured batch submission, and restoration of the normal composer.
diff --git a/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md b/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md
index ab9421c2ed..ba482809e2 100644
--- a/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md
+++ b/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md
@@ -4,31 +4,27 @@ Status: implemented
 
 ## Problem
 
-The harness gives the model bash and subagent tools but no way to record a structured task list. A todo list serves two co-equal purposes: it steers the model to plan multi-step work and keep the active task unambiguous (at most one active, exactly one while work remains), and it gives the human a live progress checklist. The ACP protocol has a native `plan` sessionUpdate that editors (Zed) already render, but the bridge never emitted one. Every reference coding agent surveyed (claude-code, opencode, codex, oh-my-pi, pi) ships some form of this; the harness had nothing.
+The harness gives the model bash and subagent tools but no way to record a structured task list. A todo list serves two co-equal purposes: it steers the model to plan multi-step work and keep the active task unambiguous (at most one active, exactly one while work remains), and it gives an interactive host a live progress checklist. Every reference coding agent surveyed (claude-code, opencode, codex, oh-my-pi, pi) ships some form of this; the harness had nothing.
 
 ## Decision
 
-Add a model-facing `todo_write(todos: [{ content, status }])` tool whose whole-list state lives on the event-sourced session log as a new `todo/write` `SessionEventMap` variant. Both the stdio UI and the ACP bridge render off the existing `session/event` — the ACP bridge maps the list to a `plan` sessionUpdate.
+Add a model-facing `todo_write(todos: [{ content, status }])` tool whose whole-list state lives on the event-sourced session log as a new `todo/write` `SessionEventMap` variant. Interactive hosts render from the durable event; the TUI folds it directly, while the [automation-only ACP bridge](../simplification/2026-07-23-acp-automation-only-protocol.md) deliberately omits todo presentation.
 
 ### Whole-list replace, three-state status
 
-The model sends the ENTIRE list every call; the new list replaces the old (last-write-wins on replay). This is the shape claude-code V1, opencode, and codex `update_plan` all use, and the shape the model is most trained on — no per-item ids, no delta protocol. `status` is exactly `pending | in_progress | completed`: the same triple as codex `update_plan` and, crucially, **identical to the ACP `PlanEntryStatus`**, so the bridge maps it 1:1 with no lossy translation.
+The model sends the entire list every call; the new list replaces the old (last-write-wins on replay). This is the shape claude-code V1, opencode, and codex `update_plan` all use, and the shape the model is most trained on — no per-item ids, no delta protocol. `status` is exactly `pending | in_progress | completed`, the same triple as codex `update_plan`.
 
 ### State on the session log, not a service
 
-The list is appended as a `todo/write` event carrying the full `{ todos }` snapshot. The harness is event-sourced — the LLM history, tool calls, and turn structure all live on the log — so the todo list lives there too. This buys durability, replay, and `session/load` reconstruction for free: a reopened session re-derives the current list (the last `todo/write`) and the ACP bridge re-emits the `plan` on load, with no separate persistence backend, no in-memory service to rehydrate, and no extra wiring. An in-memory `ctx.todos` service would have had to reinvent all of that.
+The list is appended as a `todo/write` event carrying the full `{ todos }` snapshot. The harness is event-sourced — the LLM history, tool calls, and turn structure all live on the log — so the todo list lives there too. This buys durability, replay, and resume reconstruction for free: a reopened session re-derives the current list from the latest `todo/write`, with no separate persistence backend, in-memory service to rehydrate, or extra wiring. An in-memory `ctx.todos` service would have to reinvent all of that.
 
 ### NOT a surface event
 
 `todo/write` is deliberately excluded from `SurfaceEventType`. The surface is the projection that produces the LLM message history (`deriveMessages()`); a todo write produces no conversation message. So it carries no `surfaceOp`, never joins the ordered surface, and never reaches `deriveMessages()` — it is durable, replayable *UI* state that travels alongside the conversation without being part of it. (The dev-mode invariants still require it to sit inside an open turn, which it always does: it is appended mid-step during a tool call.)
 
-### Priority synthesized only at the ACP boundary
-
-ACP's `PlanEntry` requires `content` + `priority` + `status`, but a `TodoItem` has no priority — the model never reasons about it. Rather than burden the schema with a field the model must always supply, the bridge synthesizes a constant `priority: 'medium'` on every entry when it builds the `plan`. Priority is an ACP wire requirement, not a harness concept, so it lives at exactly the boundary that needs it.
-
 ### Dropped vs claude-code V1: `activeForm`, id, priority
 
-claude-code V1's item is `{ content, status, activeForm }`; later (V2) it grew ids, dependencies, and ownership — but only to support agent *swarms* (disk-backed, lock-guarded, per-item mutation). This tool keeps the item at the minimum: `{ content, status }`. No `activeForm` (the present-continuous label) — the UI shows `content`; no id — whole-list replace needs no stable identity; no priority — see above. Each dropped field is one less thing the model must produce on every call.
+claude-code V1's item is `{ content, status, activeForm }`; later (V2) it grew ids, dependencies, and ownership — but only to support agent *swarms* (disk-backed, lock-guarded, per-item mutation). This tool keeps the item at the minimum: `{ content, status }`. No `activeForm` (the present-continuous label) — the UI shows `content`; no id — whole-list replace needs no stable identity; no priority — ordering is the only ranking the model controls. Each dropped field is one less thing the model must produce on every call.
 
 ### Single owner — no swarm machinery (YAGNI)
 
@@ -45,18 +41,18 @@ The schema enforces type/required/enum. Beyond that, `execute` rejects empty or
 ## Testing
 
 Four tiers, designed up front:
-- **Unit** — the session event (append/snapshot-clone/last-write-wins/not-on-surface); the tool (schema shape, arg validation via the real `ctx.tools.execute`, value validation, the event append + replacement, no-agent rejection, `presentCall`, HMR-safety); the ACP `todosToPlan` mapping; the stdio render arm.
+- **Unit** — the session event (append/snapshot-clone/last-write-wins/not-on-surface); the tool (schema shape, arg validation via the real `ctx.tools.execute`, value validation, the event append + replacement, no-agent rejection, `presentCall`, HMR-safety); and TUI folding.
 - **Real-Loader path** — the plugin run through `Loader.unwrapExports`, asserting the namespace export shape survives (it HAS `inject`, so a stray default would crash at load — postmortem/0001).
 - **Full-loop integration** — a scripted mock model calls `todo_write` through the real agent loop; the `todo/write` event lands and a second call replaces it.
-- **`session/load` replay** — a persisted `todo/write` re-emits the `plan` update when a fresh ACP bridge loads the session.
-- **With-key e2e + snapshot** — a real prompt induces a `todo_write`; the snapshot expected output gains the `plan` notification and the log event.
+- **Resume/replay** — a persisted `todo/write` folds back into the current task list.
+- **With-key e2e + snapshots** — a real prompt induces `todo_write`; assembled snapshots pin the log event and interactive rendering.
 
 ## Alternatives considered
 
-- **In-memory `ctx.todos` service** — would reinvent durability, replay, and `session/load` reconstruction the log gives for free.
+- **In-memory `ctx.todos` service** — would reinvent durability, replay, and resume reconstruction the log gives for free.
 - **Per-item delta protocol** — only needed for a shared multi-owner list, which is out of scope; whole-list replace is simpler and matches the references.
 - **Tool in `core/`** — `todo_write` is an extension tool registering on `ctx.tools`, not part of the spine; it lives in its own `packages/todo/` group like other tool families.
 
 ## Consequences
 
-The todo list is durable, replayable session state: a persisted `todo/write` re-emits the editor's `plan` update on `session/load`, and the log — not plugin memory — is the single source of truth. Whole-list replace means one tool call per update with last-write-wins; there is no delta protocol to reconcile. The event stays off the surface, so a todo update never perturbs the derived model history — the model sees only its own tool call and result.
+The todo list is durable, replayable session state: an interactive host re-derives it from the latest persisted `todo/write`, and the log — not plugin memory — is the single source of truth. Whole-list replace means one tool call per update with last-write-wins; there is no delta protocol to reconcile. The event stays off the model surface, so a todo update never perturbs derived model history — the model sees only its own tool call and result.
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.md b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.md
index 0c3c1e13ef..b9a2d54fec 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.md
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.md
@@ -29,7 +29,7 @@ Each bridge maps the neutral `MergedHookOutcome` from the shared lib onto the se
 | `subagent/start` (emit) | additionalContext → inject into a live in-process child; a remote child has no local injection target | unsupported by this bridge |
 | `subagent/end` (emit) | observe-only | unsupported by this bridge |
 
-The CC bridge's `ask` result is a real permission path, not a terminal bridge decision: `dsh-tools` resolves it through the optional [approval seam](2026-07-06-approval-seam.md). A composed ACP answerer prompts the owning editor session and `allowed-once` proceeds; without an ApprovalService or answerer, the call fails closed to `deny`.
+The CC bridge's `ask` result is a real permission path, not a terminal bridge decision: `dsh-tools` resolves it through the optional [approval seam](2026-07-06-approval-seam.md). An ACP automation client may answer the owning session's one-shot machine-policy request and `allowed-once` proceeds; without an ApprovalService or answerer, the call fails closed to `deny`.
 
 ### Context source is always the plugin (the mislabel guard)
 
@@ -53,7 +53,7 @@ Hooks run in the agent's session workspace, so relative paths target the user's
 
 ## Deferred compatibility gaps
 
-- **Tool-input rewrite.** A CC/Codex `updatedInput` is logged + warned, not honored — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite Agent Note](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)), because the pre-execution args are read by `tool/call` audit + `assistant/message` history + ACP/tool-bash presentation, so an honest rewrite is a design unit, not a field.
+- **Tool-input rewrite.** A CC/Codex `updatedInput` is logged + warned, not honored — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite Agent Note](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)), because the pre-execution args are read by `tool/call` audit + `assistant/message` history + tool presentation, so an honest rewrite is a design unit, not a field.
 - **Stop loop-guard** (`TODO(stop-loop-guard)`). Claude Code supplies `stop_hook_active` and overrides a hook after eight consecutive blocks; Codex supplies `stop_hook_active` but documents no equivalent cap. Both bridges always report `false`, so a Stop hook that unconditionally blocks force-continues every step — a hook author must self-limit until state tracking lands.
 - **Hook `continue:false` (hard halt).** A hook can ask to halt the whole run (CC/Codex `continue:false`); the shared merge folds it into `MergedHookOutcome.stop`/`stopReason`, but no bridge acts on it (`TODO(hook-continue-false)`) — the interception seams have no "hard-halt the agent" primitive yet (a Decision blocks/steers a single point, not the run). Deferred with the loop-guard work; the halt request is recorded in the `hook/result` log, and the hook keeps its per-point effect (decision/context) meanwhile.
 - **Config discovery.** The path is explicit in `cordis.yml` and process-level (see above); the full multi-layer CC/Codex precedence walk, per-session project-local discovery, and the trust/hash model are not reimplemented (`TODO(per-session-hook-config)`).
diff --git a/.agents/notes/implemented/feature/2026-06-30-interception-seams.md b/.agents/notes/implemented/feature/2026-06-30-interception-seams.md
index a0504893d9..0900e68778 100644
--- a/.agents/notes/implemented/feature/2026-06-30-interception-seams.md
+++ b/.agents/notes/implemented/feature/2026-06-30-interception-seams.md
@@ -43,7 +43,7 @@ Core dispatch and the tool body sit inside normalization boundaries, so tool, li
 
 ### Pre-tool input rewrite is a separate consistency decision
 
-`PreToolDecision` cannot rewrite arguments. History and the audit call are logged before execution, and ACP presentation reads the same input, so the registry seals arguments before policy. A valid rewrite must update history, audit, presentation, and execution before identity is created; that contract belongs to the [input-rewrite proposal](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md).
+`PreToolDecision` cannot rewrite arguments. History and the audit call are logged before execution, and UI presentation reads the same input, so the registry seals arguments before policy. A valid rewrite must update history, audit, presentation, and execution before identity is created; that contract belongs to the [input-rewrite proposal](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md).
 
 ### Boundaries
 
diff --git a/.agents/notes/implemented/feature/2026-06-30-session-store-fork-api.md b/.agents/notes/implemented/feature/2026-06-30-session-store-fork-api.md
index ee67af7d96..d21804c24e 100644
--- a/.agents/notes/implemented/feature/2026-06-30-session-store-fork-api.md
+++ b/.agents/notes/implemented/feature/2026-06-30-session-store-fork-api.md
@@ -38,4 +38,4 @@ An empty prefix is forkable; any non-empty boundary must be a safe existing sequ
 
 The public surface stays small and discoverable: live session branching is part of `ctx.sessions`, next to `create({ seed })`, rather than a standalone service or a two-step helper pair. Persistence continues to work through existing `session/created` and `session/flush` behavior: a forked child starts life with seeded events, so existing backends persist that seed once and preserve `parentSession` / `seedLength` in the header.
 
-The v1 scope still excludes ACP `session/fork`, unloaded persisted-session forking, model-facing tools, and subagent refactors. If a future ACP method is added, it should advertise the capability only after it has transcript/snapshot coverage; this Agent Note adds no editor-facing updates, so no ACP snapshot is required now. Fork-child replay remains covered by the existing [seed-boundary testing Agent Note](../testing/2026-06-22-fork-child-replay-seed-boundary.md), while this API gets focused `dsh-session` unit tests plus JSONL persistence coverage.
+The v1 scope still excludes ACP `session/fork`, unloaded persisted-session forking, model-facing tools, and subagent refactors. If a future ACP method is added, it should advertise the capability only after it has protocol and snapshot coverage; this Agent Note adds no ACP wire behavior, so no ACP snapshot is required. Fork-child replay remains covered by the existing [seed-boundary testing Agent Note](../testing/2026-06-22-fork-child-replay-seed-boundary.md), while this API gets focused `dsh-session` unit tests plus JSONL persistence coverage.
diff --git a/.agents/notes/implemented/feature/2026-07-05-dynamic-workflows.md b/.agents/notes/implemented/feature/2026-07-05-dynamic-workflows.md
index fcd0b66062..b2a1292fec 100644
--- a/.agents/notes/implemented/feature/2026-07-05-dynamic-workflows.md
+++ b/.agents/notes/implemented/feature/2026-07-05-dynamic-workflows.md
@@ -58,7 +58,7 @@ Worker-side logic runs through an in-process `MessageChannel` so V8 coverage mea
 - **Nested `workflow()`**, **token `budget`**, and the `effort`/`isolation`/`agentType` agent options (each rejects loud with a message naming it deferred).
 - **An overall run wall-clock timeout** — cancellation always frees the caller (result settles within the grace), so a cap on total run time is a policy knob for the background redesign, not a correctness need here.
 - **Engine hardening beyond worker threads**: an isolated-vm or separate-process engine behind the same seam (actual sandboxing; memory limits).
-- **ACP progress UI** over the `workflow/*` events (a `/workflows`-style view); the events exist for it.
+- **Human-interface progress UI** over the `workflow/*` events (a `/workflows`-style view); the events exist for it.
 - **ACP-backend structured output** and **`toolFilter`** (both still capability-gated `false`).
 
 ## Alternatives considered
diff --git a/.agents/notes/implemented/feature/2026-07-05-skill-system.md b/.agents/notes/implemented/feature/2026-07-05-skill-system.md
index eccc58f7c2..2f675f0013 100644
--- a/.agents/notes/implemented/feature/2026-07-05-skill-system.md
+++ b/.agents/notes/implemented/feature/2026-07-05-skill-system.md
@@ -10,7 +10,7 @@ DeepSeek Harness uses the same primitive so project-specific review, plugin-auth
 
 ## Decision
 
-`@deepseek-ai/dsh-skill` is the pure provider registry (`ctx.skills`), `@deepseek-ai/dsh-skill-local` is the shipped local filesystem provider, and `@deepseek-ai/dsh-tool-skill` owns the session-prefix catalog and model-facing loader tool. `dsh-agent-spine-demo` loads the registry, local provider, and consumer by default so stdio and ACP apps get the same behavior while embedded or remote providers contribute skills without changing the registry or consumer. Its `skills` config forwards `registry`, `local`, and `tool` branches to those owners.
+`@deepseek-ai/dsh-skill` is the pure provider registry (`ctx.skills`), `@deepseek-ai/dsh-skill-local` is the shipped local filesystem provider, and `@deepseek-ai/dsh-tool-skill` owns the session-prefix catalog and model-facing loader tool. `dsh-agent-spine-demo` loads the registry, local provider, and consumer by default so TUI, headless, and ACP apps get the same behavior while embedded or remote providers contribute skills without changing the registry or consumer. Its `skills` config forwards `registry`, `local`, and `tool` branches to those owners.
 
 Provider plugins register synchronously during `apply()`. Provider membership is direct effect-owned state: registration and disposal invalidate completed catalogs synchronously, and discovery reads the current provider map on demand rather than observing registry-change events. Provider catalogs return ranked candidates from awaited `list()` calls, where remote providers perform initialization, authentication, and discovery while honoring the lookup abort signal. The registry validates each candidate, resolves same-name skills first-wins by rank, provider registration order, and provider-local order, then sorts summaries by skill name for deterministic consumers. It caches only completed catalog snapshots and retries when a provider/runtime revision changes during discovery, so an unload cannot freeze a stale, unresolvable skill into a session prefix. Runtime `ctx.skills.register(...)` remains a convenience for embedded in-process skills and uses project-over-user priority; `runtime` is reserved as the registry-owned provider name.
 
@@ -30,7 +30,7 @@ The data structures and catalog/tool contract are documented in [skills.md](../.
 
 **Inject full skill bodies into every system prompt.** Rejected because it destroys progressive disclosure and makes every request pay for instructions that may not apply.
 
-**Expose skills only as slash commands.** Rejected because model-initiated loading is the core capability; slash/ACP command advertisement does not change discovery.
+**Expose skills only as slash commands.** Rejected because model-initiated loading is the core capability; human command advertisement does not change discovery.
 
 **Put local filesystem scanning directly inside `ctx.skills`.** Rejected because coding agents, web agents, and future plugin ecosystems need different skill sources. A provider registry mirrors the subagent seam: the registry owns conflict resolution and consumers, while implementations own loading.
 
diff --git a/.agents/notes/implemented/feature/2026-07-06-approval-seam.md b/.agents/notes/implemented/feature/2026-07-06-approval-seam.md
index af063895e2..6026f52aa5 100644
--- a/.agents/notes/implemented/feature/2026-07-06-approval-seam.md
+++ b/.agents/notes/implemented/feature/2026-07-06-approval-seam.md
@@ -4,13 +4,13 @@ Status: implemented
 
 ## Problem
 
-Two callers need to put one question — "may this specific action proceed?" — to a human: `tools/pre-execute`'s `ask` decision (including the Claude-Code hook bridge's `permissionDecision: ask`) and the [sandbox Agent Note](2026-07-06-sandbox.md)'s post-denial one-shot escalation retry. A shared seam keeps them from inventing separate outcome vocabularies, UI routing, cancellation, and audit trails, while guaranteeing that a deployment with no UI can never grant an unanswerable request.
+Two callers need one closed decision — "may this specific action proceed?": `tools/pre-execute`'s `ask` decision (including the Claude-Code hook bridge's `permissionDecision: ask`) and the [sandbox Agent Note](2026-07-06-sandbox.md)'s post-denial one-shot escalation retry. A shared seam keeps them from inventing separate outcome vocabularies, channel routing, cancellation, and audit trails, while guaranteeing that a deployment with no answerer can never grant an unanswerable request. The answerer may be an interactive host or an automated controller.
 
-The routing problem is ownership: an approval prompt must reach the editor session that owns the asking agent (the ACP bridge multiplexes N sessions over one connection), fail closed for agents nobody owns (in-process subagents, tests), and stay out of deployments that compose no UI (headless, CI).
+The routing problem is ownership: a permission request must reach the channel that owns the asking agent, fail closed for agents nobody owns, and stay out of deployments that compose no answerer.
 
 ## Decision
 
-One package, `dsh-user-approval` (`packages/ui/user-approval`), owning the vocabulary and the `ctx.approval` service — the MECHANISM. The POLICY — who answers, and whether a session is asked at all — lives outside it: answerers are `approval/request` waterfall listeners registered by the plugins that own the channel (the ACP bridge; future terminal UIs; test scripts), and a per-session policy tier can decide before any human is involved. Consumers (`dsh-tools`' ask routing, the sandbox escalation gate) resolve a question to a closed outcome and derive their own tool results from it. Deliberately ONE package, not the capability-seam three (see Alternatives).
+One package, `dsh-user-approval` (`packages/ui/user-approval`), owns the vocabulary and the `ctx.approval` service — the mechanism. The policy — who answers, and whether a session is asked at all — lives outside it: answerers are `approval/request` waterfall listeners registered by channel-owning plugins (the ACP bridge, host adapters, and test scripts), and a per-session policy tier can decide before a channel is involved. Consumers (`dsh-tools`' ask routing and the sandbox escalation gate) resolve a question to a closed outcome and derive their own tool results from it. This is deliberately one package, not the capability-seam three (see Alternatives).
 
 ### How a deployment uses it
 
@@ -23,11 +23,11 @@ One `cordis.yml` entry mounts the seam. Not loading it is the fail-closed opt-ou
   #   policy: never   # deployment default for sessions without an override; 'ask' when omitted
 ```
 
-The entry alone provides mechanism, not a channel: with no answerer composed, every ask resolves `unavailable` and the asking tool call denies — fail-closed needs no configuration. Composing the ACP app (`@deepseek-ai/dsh-acp-demo`, as in [the acp-agent example's default tree](../../../../examples/acp-agent/README.md)) completes the loop: its bridge registers an answerer that prompts the owning editor session via `session/request_permission`, so a hook's `ask` or an escalation request surfaces as a one-shot Allow/Reject prompt attached to the already-streamed tool call. `policy: never` is the unattended stance — every ask auto-rejects deterministically, stated in the system prompt, no human in the loop. `policy` is validated against the closed list at plugin load; anything else throws.
+The entry alone provides mechanism, not a channel: with no answerer composed, every ask resolves `unavailable` and the asking tool call denies — fail-closed needs no configuration. Composing the ACP app (`@deepseek-ai/dsh-acp-demo`, as in [the acp-agent example's default tree](../../../../examples/acp-agent/README.md)) completes the loop: its [automation-only bridge](../simplification/2026-07-23-acp-automation-only-protocol.md) registers an answerer that sends `session/request_permission` to the owning client with the exact tool-call id and one-shot allow/reject options. `policy: never` is the unattended stance — every ask auto-rejects deterministically and is stated in the system prompt. `policy` is validated against the closed list at plugin load; anything else throws.
 
 What a composed deployment observes: `allowed-once` lets exactly that call proceed; rejection, dismissal, and channel absence deny with three distinct reasons the model can tell apart; a successful in-turn request lands a durable `approval/asked`/`approval/decided` pair on the asking agent's session log; nothing about a grant persists past the call that asked. An idle request or audit append failure rejects instead of returning an unaudited decision.
 
-One ask under this composition, verbatim from the sandbox example's recorded `escalation-approved` scenario — the model requests a sandbox escalation, the gate asks, the bridge prompts the owning editor, the user clicks Allow once:
+One ask under this composition, from the sandbox example's recorded `escalation-approved` scenario — the model requests a sandbox escalation, the gate asks, and the automation client selects Allow once:
 
 ```
 tool/call        bash {"command": "printf 'escalated\n' > escalated.txt && cat escalated.txt",
@@ -38,12 +38,12 @@ approval/asked   {"toolName": "bash", "callId": "call_00_…",
   → session/request_permission {"toolCall": {"toolCallId": "call_00_…"},
                   "options": [{"optionId": "allow-once", "name": "Allow once", "kind": "allow_once"},
                               {"optionId": "reject-once", "name": "Reject",     "kind": "reject_once"}]}
-  ← the user picks "Allow once" on the prompt the editor attaches to the streamed bash call
+  ← the client selects "Allow once"
 approval/decided {"outcome": "allowed-once"}
 tool/result      "escalated" — this one call ran under the wider mode; the grant died with it
 ```
 
-The `escalation-rejected` twin ends in `{"outcome": "rejected"}` instead: nothing executes, and the model's result carries the asker's verbatim fail-closed text (`the user rejected escalating this command to "workspace-write"`). A hook's `permissionDecision: ask` rides the identical wire; only the asker and its deny texts differ (§ Ask routing in dsh-tools). Headless, the same request skips the prompt entirely and settles `unavailable`.
+The `escalation-rejected` twin ends in `{"outcome": "rejected"}` instead: nothing executes, and the model's result carries the asker's verbatim fail-closed text (`the user rejected escalating this command to "workspace-write"`). A hook's `permissionDecision: ask` rides the identical wire; only the asker and its deny texts differ (§ Ask routing in dsh-tools). Without an answerer, the same request settles `unavailable`.
 
 ### Design detail
 
@@ -53,11 +53,11 @@ After validation and a successful `approval/asked` append, the service resolves
 
 Answerers are `approval/request` waterfall listeners. Zero listeners fall through to `unavailable`; a recognizing listener occupies the first-wins decision slot, while an unrecognized agent must delegate with `next()`. Listeners dispose with their fibers, so an unloaded channel fails closed. Because sibling registration order is not deterministic, a deployment composes one terminal answerer and reserves `prepend` for decide-or-delegate gates.
 
-`ApprovalRequest` carries the asking `agent`, `toolName`, optional exact `callId`, human-readable `reason`, and optional `signal`. It uses the `CallId` brand without importing `dsh-tools`, which depends on this seam. Tool arguments stay on the already-streamed call that a UI references by `callId`.
+`ApprovalRequest` carries the asking `agent`, `toolName`, optional exact `callId`, human-readable `reason`, and optional `signal`. It uses the `CallId` brand without importing `dsh-tools`, which depends on this seam. Channel adapters correlate any richer call state by `callId`; the approval request does not duplicate tool arguments.
 
 #### Ask routing in dsh-tools
 
-`ToolRegistry.execute()` resolves `ask` before dispatch: `allowed-once` proceeds, while rejection, cancellation, and channel absence produce distinct deny reasons. Opportunistic `ctx.get('approval')` consumption lets an absent or unmounted service fail closed without gating the registry fiber. Agent-less execution also fails closed because it has neither an audit session nor a UI owner.
+`ToolRegistry.execute()` resolves `ask` before dispatch: `allowed-once` proceeds, while rejection, cancellation, and channel absence produce distinct deny reasons. Opportunistic `ctx.get('approval')` consumption lets an absent or unmounted service fail closed without gating the registry fiber. Agent-less execution also fails closed because it has neither an audit session nor a channel owner.
 
 #### The per-session policy tier
 
@@ -65,9 +65,9 @@ The seam also owns the session-scoped `'ask' | 'never'` policy described by [the
 
 #### The ACP answerer
 
-The ACP bridge answers only for an exact agent object owned by its forward session map. It attaches `session/request_permission` to the existing `callId`, advertises one-shot allow/reject options, maps cancellation separately, and never grants an unknown option. Foreign or call-less requests delegate; a failed client RPC becomes `unavailable`. Hooks and `tools/pre-execute` decide whether a call asks at all.
+The ACP bridge answers only for an exact agent object owned by its session map. It sends `session/request_permission` with the existing `callId`, advertises one-shot allow/reject options, maps cancellation separately, and never grants an unknown option. Foreign or call-less requests delegate; a failed client RPC becomes `unavailable`. Hooks and `tools/pre-execute` decide whether a call asks at all. This channel is machine policy between an automated client and its agent, not ACP presentation.
 
-The answerer routes through the bridge's exact-agent ownership check described by [the ACP support Agent Note](2026-06-14-acp-agent-client-protocol.md), implementing the per-session permission ownership required by [the multi-session Agent Note](2026-06-14-acp-multi-session.md).
+The answerer routes through the bridge's exact-agent ownership check described by [the ACP support Agent Note](2026-06-14-acp-agent-client-protocol.md), preserving the per-session permission ownership required by [the multi-session Agent Note](2026-06-14-acp-multi-session.md).
 
 #### Audit, and what the model sees
 
@@ -86,13 +86,13 @@ Snapshots record allowed and rejected sandbox escalation through `session/reques
 ## Deferred
 
 - **`allow_always` grant storage** — honoring a persistent grant means designing storage, scope identity (call? path? prefix? session? time window?), and revocation; until designed, only the one-shot options are advertised ([the sandbox Agent Note](2026-07-06-sandbox.md) § Escalation records the open scope question).
-- **A recorded hook-driven `ask` through a composed answerer** — the human-prompt wire is recorded through the sandbox example's escalation branches. The hook matrix's `hook-cc-pretool-ask` pins the no-ApprovalService fallback denial, while the hook-producer-plus-answerer composition remains on the unit tier.
-- **Routing a child agent's approvals to the parent session** — `subagent-acp`'s child auto-answers its own `permission` requests; surfacing them to the parent's editor is its own design.
+- **A recorded hook-driven `ask` through a composed answerer** — the permission wire is recorded through the sandbox example's escalation branches. The hook matrix's `hook-cc-pretool-ask` pins the no-ApprovalService fallback denial, while the hook-producer-plus-answerer composition remains on the unit tier.
+- **Routing a child agent's approvals to the parent session** — `subagent-acp`'s child auto-answers its own permission requests; delegating them to the parent controller is its own design.
 
 ## Alternatives considered
 
 - **A single registered provider instead of waterfall listeners** — rejected: a `registerProvider()` surface forces every composition question — allowlist pre-filters, external hook deciders, scripted test answers, a policy gate in front of a human — inside one provider implementation. The waterfall gets composition, fail-closed absence, and HMR disposal from machinery the runtime already has; the seam's JSDoc pins the single-decision-slot convention instead of inventing a provider registry.
-- **An inline `tools/pre-execute` permission gate in the ACP bridge** — rejected: prompting for every bridge-owned call hardwires the asking POLICY into the UI plugin, cannot serve a second asker (sandbox escalation happens after execution starts, with no pre-execute moment), and leaves hook-produced `ask` decisions without a shared mechanism.
+- **An inline `tools/pre-execute` permission gate in the ACP bridge** — rejected: prompting for every bridge-owned call hardwires the asking policy into the transport, cannot serve a second asker (sandbox escalation happens after execution starts, with no pre-execute moment), and leaves hook-produced `ask` decisions without a shared mechanism.
 - **The generic user-interaction seam (`ctx.userInteraction`)** — rejected as the approval mechanism: the two share a skeleton (route by agent, block for a human, handle absence), but approval's contract is narrower in every dimension that matters: a closed outcome vocabulary instead of free text, a protocol-native prompt attached to a tool call instead of a generic form, mandatory fail-closed absence, and audit events. Approval therefore does not ride the shipped `packages/ui/user-interaction` / `ask_user_question` elicitation path — an elicitation form is not a permission prompt, and a free-text answer is not a closed outcome; sharing provider plumbing stays open if the two ever converge.
 - **Static optional injection in `dsh-tools`** — rejected: the vendored cordis `Inject` type has no optional flag — the object form maps service names to intercept config, and a declared inject gates the fiber. `ctx.get('approval')` is the documented opportunistic-consumption pattern (the `tool-bash` owner-token lookup, the loop's persistence probe), reads presence per call, and degrades correctly across HMR without extra machinery.
 - **The capability-seam three-package split** — rejected: interface/implementation/consumer fits a seam whose implementation is swappable (bash-local vs bash-sandbox). Here the service body is fixed mechanism and the variable part is listeners that live with their owners — splitting would manufacture an implementation package with nothing in it ("don't split preemptively").
@@ -105,13 +105,13 @@ The implemented contract is pinned by the suites in Testing:
 - `allowed-once` dispatches one action; every other outcome denies with a distinct reason, and `'never'` rejects before prompting.
 - Missing, foreign, agent-less, throwing, invalid, and disconnected answer paths fail closed.
 - Successful requests route by exact agent ownership and append one replayable, model-invisible audit pair; idle and pre-commit failures reject.
-- ACP ownership keeps prompts inside their session, while a deployment without the service emits no prompt or audit events.
+- ACP ownership keeps decisions inside their session, while a deployment without the service emits no request or audit events.
 
 Costs and accepted limits:
 
 - **Two decide-eager answerers race for the slot.** Sibling-plugin listener order is not deterministic, so the seam cannot referee competing terminal answerers — mitigated by convention (one terminal answerer per deployment; `prepend` only for decide-or-delegate gates) rather than a priority mechanism the event bus does not have.
 - **Production exercise rests on one composition.** `ask` has two producer families — the hook bridges through `tools/pre-execute`, and sandbox escalation through its own gate — with the wire recorded in the sandbox example's snapshot suite, so the seam's real-world coverage is that one composition until more deployments compose it.
-- **Ownership keys on `Agent` object identity.** The answerer resolves the forward session-map record at `agent.session.id`, then requires that record to own the exact agent object; every current path hands the same object through the loop and the seams, but a future boundary that clones or proxies agents would make the bridge delegate and fail closed — safe, but silently UI-less — and would need a different ownership contract.
+- **Ownership keys on `Agent` object identity.** The answerer resolves the session-map record at `agent.session.id`, then requires that record to own the exact agent object; every current path hands the same object through the loop and the seams, but a future boundary that clones or proxies agents would make the bridge delegate and fail closed, and would need a different ownership contract.
 
 ## FAQ
 
@@ -121,10 +121,10 @@ Costs and accepted limits:
 - **Who decides whether a call asks in the first place?** Policy producers: a hook returning `permissionDecision: ask`, any `tools/pre-execute` listener, or the sandbox escalation gate. The seam and the bridge only route and answer; neither injects its own judgment about what deserves a prompt.
 - **What happens when the user dismisses the prompt, or the turn aborts mid-ask?** Dismissal maps to `cancelled` with its own deny text. An already-aborted signal settles `cancelled` without dispatching; an abort during the ask discards the late answer. When both audit appends commit, either path records one pair, never two.
 - **What if the client answers with an option the harness never offered?** Any selection other than the offered `allow_once` maps to `rejected` — an unknown optionId from a non-conforming client can never grant.
-- **How do subagents' approvals route?** An agent no answerer owns delegates through the whole waterfall and fails closed — in-process subagents are deliberately unanswerable. `subagent-acp`'s child-side auto-answer is separate; routing a child's asks to the parent's editor is deferred (§ Deferred).
+- **How do subagents' approvals route?** An agent no answerer owns delegates through the whole waterfall and fails closed — in-process subagents are deliberately unanswerable. `subagent-acp`'s child-side auto-answer is separate; routing a child's asks to the parent controller is deferred (§ Deferred).
 - **What does `policy: 'never'` actually change at runtime?** The service resolves every ask for that session to `rejected` before dispatching any answerer (in-service, so no registration order can bypass it); the system prompt states the policy; switches are narrated at boundaries; each successful auto-rejection records the audit pair.
-- **What happens across a hot reload, or when the UI plugin unloads mid-session?** Answerers dispose with their owning fiber, so the next ask degrades to `unavailable` instead of hanging on a dead channel; remounting re-registers the answerer with no catch-up state.
-- **Where does the user see what they are approving?** On the tool call itself: the prompt attaches to the already-streamed call via `callId` — arguments included — and adds the asker's human-readable `reason`; the request carries no argument copy of its own.
+- **What happens across a hot reload, or when an answerer unloads mid-session?** Answerers dispose with their owning fiber, so the next ask degrades to `unavailable` instead of hanging on a dead channel; remounting re-registers the answerer with no catch-up state.
+- **Where does a client get approval context?** The request carries the exact `callId` and the asker's human-readable `reason`; channel adapters may correlate richer tool-call state without duplicating arguments in the approval seam.
 
 ## Prior art
 
@@ -133,5 +133,5 @@ In-repo precedents this design copies or contrasts with:
 - The `fs/write-intent` gate (`packages/fs/fs/`) — the documented single-occupancy decision-slot waterfall semantics (first answer wins, delegate via `next()`) the answerer contract reuses.
 - `hook/invoked`/`hook/result` — the log-only audit-pair precedent `approval/asked`/`approval/decided` follows; [the hook-bridges Agent Note](2026-06-30-hook-bridges.md) ships `permissionDecision: ask`, the first producer.
 - [The interception-seams Agent Note](2026-06-30-interception-seams.md) — the `tools/pre-execute` `allow`/`deny`/`ask` vocabulary whose `ask` this seam services.
-- [The ACP support Agent Note](2026-06-14-acp-agent-client-protocol.md) — the exact-agent ownership check against the forward session map that the answerer routes through; [the multi-session Agent Note](2026-06-14-acp-multi-session.md) — the per-session permission-ownership blocker this implements.
+- [The ACP support Agent Note](2026-06-14-acp-agent-client-protocol.md) — the exact-agent ownership check against the session map that the answerer routes through; [the multi-session Agent Note](2026-06-14-acp-multi-session.md) — the per-session permission-ownership blocker this implements.
 - The opportunistic `ctx.get()` consumption pattern (`tool-bash`'s owner-token lookup, the loop's persistence probe) — how `dsh-tools` consumes the seam without gating its fiber on it.
diff --git a/.agents/notes/implemented/feature/2026-07-06-sandbox.md b/.agents/notes/implemented/feature/2026-07-06-sandbox.md
index 507142fac9..b05ac1b5c2 100644
--- a/.agents/notes/implemented/feature/2026-07-06-sandbox.md
+++ b/.agents/notes/implemented/feature/2026-07-06-sandbox.md
@@ -8,7 +8,7 @@ A coding agent needs this product path: bash subprocesses — and the hook comma
 
 The harness is an SDK, so confinement must be a capability developers COMPOSE: whether to sandbox, and which backend per platform, belongs in the leaf `cordis.yml` as a first-class entry — not inside one executor's private machinery. And the first-choice runner, `bwrap`, is unusable on exactly the hosts a sandbox matters most (minimal containers, disabled unprivileged userns, LSMs that deny `mount`), so a fallback runner has to ship with the SDK rather than be assumed on the host.
 
-Confinement alone leaves two gaps. A denial with no escalation path is terminal — the model can only give up, which pressure-cooks operators into configuring `workspace-write` or `danger-full-access` globally and defeats the sandbox. And the model-visible knobs (the sandbox mode, the approval policy) change over an agent's lifetime — an ACP user flips a per-session setting, an operator edits `cordis.yml` while the process is down — while the model must never act on a stale belief about them: what IS the state on every request, what changed while the agent lives, and what changed while nobody was watching all need answers.
+Confinement alone leaves two gaps. A denial with no escalation path is terminal — the model can only give up, which pressure-cooks operators into configuring `workspace-write` or `danger-full-access` globally and defeats the sandbox. The sandbox mode and approval policy can also change over an agent's lifetime through deployment config or an optional UI policy control; execution and model-visible policy must derive from the same logged state.
 
 ## Decision
 
@@ -38,13 +38,13 @@ The swap is invisible to every consumer of `ctx.bash`: the bash tools, hook comm
 
 Misconfiguration fails loud: `mode` outside the closed vocabulary is rejected at plugin load, and a host with no usable backend throws the structured `SANDBOX_UNAVAILABLE` — at `confine()` before the command ever spawns — rather than degrading to unconfined execution. `runnerCommand` on `dsh-sandbox-local` is the operator's explicit assertion of a bwrap-compatible runner (chain and probes skipped); it doubles as the deterministic fake-runner seam for keyless tests.
 
-Denied file effects return a `[sandbox: file access denied under <mode> mode]` marker and instructions not to work around the denial. A confining executor adds paired `sandbox_permissions` and `justification` fields for one approved retry that must be strictly wider than the session's effective mode. A grant widens only that retry; rejection executes nothing, returns `the user rejected escalating this command to "<mode>"`, and permits no re-ask. The prompt does not announce sandbox mode, avoiding preemptive refusal. When `dsh-permission` is composed, ACP exposes one `Permissions` select whose presets write both knob events; unmatched knobs appear as switch-away-only `custom`. Only a switch to the deterministic `'never'` approval policy is stated in the prompt and narrated.
+Denied file effects return a `[sandbox: file access denied under <mode> mode]` marker and instructions not to work around the denial. A confining executor adds paired `sandbox_permissions` and `justification` fields for one approved retry that must be strictly wider than the session's effective mode. A grant widens only that retry; rejection executes nothing, returns `the user rejected escalating this command to "<mode>"`, and permits no re-ask. The prompt does not announce sandbox mode, avoiding preemptive refusal. When `dsh-permission` is composed with a UI adapter, one preset selects both knob values; unmatched values fold to `custom`. The [ACP automation composition](../../../../examples/acp-agent/README.md) does not mount that UI service and selects its deployment mode explicitly.
 
 ### Design detail
 
 #### Scope grounding
 
-OS subprocess confinement applies to the bash executor, including hook commands, and later to ACP subagent children. Filesystem, web, and other tools execute in-process and require policy at their own seams; an argv wrapper cannot confine a function closing over `ctx`. The existing bash request/spec split carries per-call overrides, while `tools/pre-execute` and the approval seam own the human decision.
+OS subprocess confinement applies to the bash executor, including hook commands, and later to ACP subagent children. Filesystem, web, and other tools execute in-process and require policy at their own seams; an argv wrapper cannot confine a function closing over `ctx`. The existing bash request/spec split carries per-call overrides, while `tools/pre-execute` and the approval seam own the one-shot policy decision.
 
 #### The seam: `ctx.sandbox`
 
@@ -90,7 +90,7 @@ Left open: what a durable grant's scope identity is beyond the sandbox mode —
 effective(session) = findLast(the session's own knob events)?.value ?? the composition-config default
 ```
 
-The default is composition config (`cordis.yml`) — operator-owned, process-wide. A runtime switch is a SESSION-SCOPED override recorded as one log-only event in that session's own log. Restart immunity (resuming a session replays its log, so overrides come back with zero catch-up machinery) and multi-session isolation (one editor tab's `workspace-write` cannot disturb another's `read-only`) both fall out by construction, and no external config store exists anywhere.
+The default is composition config (`cordis.yml`) — operator-owned, process-wide. A runtime switch is a session-scoped override recorded as one log-only event in that session's own log. Restart immunity (resuming a session replays its log, so overrides come back with zero catch-up machinery) and multi-session isolation both fall out by construction, and no external config store exists anywhere.
 
 **One event per knob, owned by its domain** — the merge-extensible `SessionEventMap` idiom every existing event family already follows (`approval/*` in `dsh-user-approval`, `hook/*` in the hooks packages):
 
@@ -105,9 +105,9 @@ Each owner exports the same three-piece kit: the event declaration, a pure fold
 
 Sandbox mode is not narrated in the prompt; denial results report the mode when it matters, avoiding preemptive refusal based on a standing label. Approval policy is different: only `'never'` is stated because automatic rejection otherwise looks like a user decision. Policy-change notices are coalesced and delivered by the next pre-step, with log-derived fallback after restart. The notice source is inferred from event position: a knob event after the last request header is user-driven; unlogged drift is operator or config driven.
 
-**The editor surface** is protocol-native [Session Config Options](https://agentclientprotocol.com/protocol/session-config-options) — the spec's replacement for session modes (slated for removal in ACP v2), already SDK-typed. When `ctx.permission` is composed, the bridge advertises one `permission` select (category `mode`) in `session/new` and `session/load`; its options are the deployment's preset table, and its `currentValue` is `PermissionService.current()` over the session log plus composition defaults. The shipped `workspace-write` and `danger-full-access` presets each bundle a sandbox mode with an approval policy and write through to both domain setters; a knob combination outside the table is reported as switch-away-only `custom`. `session/set_config_option` validates and switches through the permission service, then returns the complete refreshed state (the spec contract).
+**The optional UI surface** is `PermissionService`: a deployment-defined preset table whose entries bundle one sandbox mode with one approval policy. The shipped `workspace-write` and `danger-full-access` presets write through to both domain setters; a knob combination outside the table is reported as `custom`. UI adapters may expose that table as a selector. The automation-only ACP transport advertises no configuration selector and mounts no permission-preset service.
 
-**Turn enclosure is the commit boundary.** A switch during an open turn appends immediately. An idle switch remains pending on the bridge record and is appended at the next prompt submission, before assembly or execution; last write wins per knob. Openness comes from log boundaries rather than `agent.status`, and setters do not append from inside a `session/event` listener because that would reorder later observers. Until anchoring, responses overlay the pending value. A crash discards it, and reload returns the durable fold.
+**Turn enclosure is the commit boundary.** A runtime switch records its preset and changed knob events on the target session, and every later capability resolution folds the last values. Adapters must use a valid session append boundary; the ACP transport has no runtime switch path.
 
 #### In-process tools
 
@@ -115,10 +115,10 @@ fs/web/todo execute in-process, so their sandbox semantics are policy at their s
 
 ### Testing
 
-- **Unit:** pin platform selection and profiles, fail-closed runner classification, per-call mode/root resolution, per-process facts, escalation validation and outcomes, permission preset folding and write-through, narrator coalescing, ACP advertisement and validation, and turn-enclosed config writes.
-- **Keyless real-runner:** exercise bwrap, Landlock, and Seatbelt against real filesystem effects at provider and bash-consumer layers; one real Cordis context concurrently drives two project sessions through shipped bash and fs tools, proving own-root success and sibling-root denial. Packed-install coverage proves the registry launcher remains executable. The real ACP composition pins permission switching and rejects unknown presets. CI rejects a silent all-skip.
+- **Unit:** pin platform selection and profiles, fail-closed runner classification, per-call mode/root resolution, per-process facts, escalation validation and outcomes, permission preset folding and write-through, narrator coalescing, and turn-enclosed config writes.
+- **Keyless real-runner:** exercise bwrap, Landlock, and Seatbelt against real filesystem effects at provider and bash-consumer layers; one real Cordis context concurrently drives two project sessions through shipped bash and fs tools, proving own-root success and sibling-root denial. Packed-install coverage proves the registry launcher remains executable. CI rejects a silent all-skip.
 - **With-key:** start the real ACP composition in read-only mode, let a model-driven bash write hit the runner's denial marker, then drive the bridge answerer and disk effect through granted and rejected workspace-write retries; unavailable credentials or runners self-skip.
-- **Snapshot:** pin the permission config-option wire, preset and knob events, prompt deltas and notices, and both scripted approval branches. A real ACP example scenario places its session under the user home while the deployment fallback points at `/tmp`, then pins a successful workspace-write mutation; this distinguishes session-root resolution from the process fallback without depending on runner-specific denial text. Other snapshots start unconfined so unrelated fixtures remain platform-independent, and policy scenarios switch explicitly.
+- **Snapshot:** pin prompt deltas and notices plus both scripted approval branches. A real ACP example scenario places its session under the user home while the deployment fallback points at `/tmp`, then pins a successful deployment-selected workspace-write mutation; this distinguishes session-root resolution from the process fallback without depending on runner-specific denial text. Other snapshots start unconfined so unrelated fixtures remain platform-independent.
 
 ## Deferred phases
 
@@ -150,7 +150,7 @@ Each phase gets its full design when picked up, validated against the code at th
 - **Narrate via `agent/user-message` + a bus event** — rejected: it presupposes a turn-entry seam that does not exist (the real seam is `agent/prompt-submit`), and pre-step's position serves both the coalesced turn-entry notice and the mid-turn immediacy bound with one listener.
 - **A standing prompt statement of the sandbox mode (+ a switch narrator)** — shipped first, then removed on live evidence: with `Bash commands run under the "read-only" file sandbox.` in every request, the model refused to ATTEMPT denied-then-escalatable work (five of twelve turns in the first manual session ended with zero tool calls), turning the sandbox into a soft lockout. The denial marker names the mode at the moment it matters and the escalation fields carry the recovery; the approval knob keeps its statement because an auto-rejection is behaviorally indistinguishable from a human "no".
 - **Track "last told" with its own bookkeeping events** — rejected: the `request/header` fold already records the exact prompt the model saw; parsing the closed candidate sentences back replaces a second bookkeeping stream — events are needed only where they ARE the store.
-- **ACP session modes instead of config options** — rejected: the preset is already one deployment-defined config-option select, and modes are slated for removal in ACP v2.
+- **Independent sandbox and approval selectors** — rejected: one deployment-defined permission preset keeps the two policy knobs coherent for UI clients that expose runtime switching.
 
 ## Consequences
 
@@ -159,11 +159,11 @@ What shipped pins — the tiers in Testing hold each:
 - A denied command retried with `sandbox_permissions` + `justification` prompts the user through the composed answerer chain; a grant runs THAT call under the wider mode (result facts say so) while every other call keeps its own effective mode; every non-grant outcome produces its distinct error text and executes nothing.
 - The escalation fields exist exactly when the mounted executor confines; a request that is not strictly wider than the call's effective mode fails closed with its own text and prompts no one; a deployment with no ApprovalService fails escalating calls closed and leaves plain calls untouched.
 - The system prompt never states the sandbox mode (an approval `'never'` policy is the one stated knob), and the whole exchange — headers, knob events, notices, approvals, results — reconstructs from the session log alone, with no event types beyond the two knob events.
-- N idle-time flips produce at most one anchored event per knob (a net-zero sequence anchors none — a no-op push from a client echoing current selections records nothing); an approval-policy switch is narrated in at most one coalesced notice; a mid-turn sandbox switch is honored by the next call's stamp.
-- A resumed session's overrides apply and are reported to the editor with no special-casing; a default changed while the process was down is narrated before the session's first new request, attributed to the operator.
-- Two concurrent sessions never see each other's state, notices, or config options.
+- One preset selection records only changed knob values, while a no-op selection records nothing; an approval-policy switch is narrated in at most one coalesced notice, and a committed sandbox switch is honored by the next call's stamp.
+- A resumed session's overrides apply with no catch-up state; a default changed while the process was down is narrated before the session's first new request, attributed to the operator.
+- Two concurrent sessions never see each other's state or notices.
 - Two concurrent project sessions in one Cordis context resolve independent workspace roots; bash and fs writes succeed inside the calling session's cwd and fail against its neighbor's cwd.
-- `agent-loop` is untouched — everything rides `systemPrompt.section`, `SessionEventMap` merging, `agent.inject()`, `agent/pre-step`, `agent/prompt-submit`, and the ACP handler surface.
+- `agent-loop` is untouched — everything rides `systemPrompt.section`, `SessionEventMap` merging, `agent.inject()`, `agent/pre-step`, `agent/prompt-submit`, and capability-owned policy resolution.
 
 Costs and accepted limits:
 
@@ -176,7 +176,6 @@ Costs and accepted limits:
 - **The model may over-ask.** Escalating without denial grounding, or picking `danger-full-access` where `workspace-write` suffices: the description steers and the enum forces the ladder, but the human prompt is the actual gate; the `approval/asked` reasons make over-asking auditable, and a `prepend` policy answerer can auto-reject patterns a deployment never wants.
 - **The advertised target set is static while the effective mode is per-session** (schemas are registry-global) — a session already at the widest mode is still offered the fields. Harmless by construction: the strict-wider check at execution, not the enum, is the safety boundary — a non-widening request fails with its own text and never prompts anyone.
 - **A granted escalation is not a working sandbox.** An unavailable backend still fails closed even for a granted escalation to a confining mode — at `confine()` when the platform has no chain or every probe fails, at execution when an unprobed sole runner refuses (classified as a sandbox failure, not a command failure) — while a granted `danger-full-access` run never touches the provider at all: there the grant, not the probe, is the authority.
-- **An idle switch lives in bridge memory until the next prompt submission anchors it.** A crash in that window reverts it (reported on `session/load`), and a session that never submits another prompt never persists it — accepted, with a loop-owned idle commit turn left as future work if durability becomes required.
 - **The approval narrator's restart baseline parses prompt prose.** The closed candidate sentence is owned by the writing module itself, so a wording change is a coordinated writer+parser edit in one file; a session whose headers predate the section silently adopts the current policy without a notice.
 - **The approval section is still a dynamic prompt surface** (a `'never'` switch breaks provider prompt-prefix caching for that session). Accepted: policy switches are rare, and a model acting on a stale `'never'` is worse. The sandbox knob no longer touches the prompt at all.
 - **The model may hold a stale belief about the sandbox mode** (nothing announces a switch). Accepted deliberately: the next attempt's marker or success corrects it, and the observed failure mode of announcing — preemptive refusal — is worse than one wasted retry.
@@ -190,7 +189,7 @@ Costs and accepted limits:
 - **Does the sandbox restrict network or process visibility?** No — `SandboxMode` claims FILE effects only; the bwrap profile deliberately does not unshare pid, and no backend claims network. Whether network restriction becomes its own knob is left open in § The seam.
 - **Which tools actually run confined?** OS subprocesses through `ctx.bash` — the bash tools, and hook commands transitively — plus the filesystem tools (`read`/`write`/`edit`) through the sandboxed `ctx.fs` provider (the [cross-family fs sandbox RFC](2026-07-14-cross-family-fs-sandbox.md)): bash confines via the OS runner, fs via an in-process path fence, both keying off the same `ctx.sandboxPolicy` mode. web/todo stay in-process and unfenced (web's only effect is network, outside the file-effect mode vocabulary).
 - **Does a granted escalation persist?** No. The grant is consumed by the exact foreground or background call that asked; every neighboring call keeps its own effective mode. A later background denial surfaces through `task_output` and may ground a new exact-command retry.
-- **When does an editor's mode switch take effect?** Mid-turn: appended immediately, honored by the very next call's stamp. Idle: held on the bridge's session record, anchored at the next `agent/prompt-submit` inside its open turn, with N flips coalescing to at most one event (none if net-zero); a crash before anchoring reverts it and `session/load` reports the truth. The model is not told — its next command simply behaves under the new mode.
+- **When does a runtime mode switch take effect?** Once its session event commits, the very next capability resolution folds and stamps the new mode. The model is not told a standing mode; its next command simply behaves under the new policy, and any denial names that policy at the point of use.
 - **What survives a restart — and what if the operator changed the config default while the process was down?** Overrides replay from the session log (`effective = fold ?? config`), so a resumed session keeps its modes with zero catch-up machinery; a default that drifted offline changes behavior the same way a switch does (the approval policy, being stated, is additionally narrated with operator/config attribution).
 - **What does `enforcement: 'partial'` on a result mean?** The selected backend enforces the subset its kernel ABI governs — e.g. Landlock before ABI v3 does not govern path truncate — and says so structurally instead of refusing the host; the probe's report line distinguishes the cases. The bwrap and Seatbelt profiles govern every promised file effect by construction, so they always report `full`.
 
diff --git a/.agents/notes/implemented/feature/2026-07-07-mcp-client-plugin.md b/.agents/notes/implemented/feature/2026-07-07-mcp-client-plugin.md
index 95cad58b46..95182cb4e5 100644
--- a/.agents/notes/implemented/feature/2026-07-07-mcp-client-plugin.md
+++ b/.agents/notes/implemented/feature/2026-07-07-mcp-client-plugin.md
@@ -97,7 +97,7 @@ This server-qualified shape is the de-facto standard among multi-server agent cl
 1. On connect: drain `client.listTools()` pagination, derive every tool's `publicName`, then register each as a raw `ToolDefinition` via `ctx.tools.register()`. The MCP JSON Schema and description pass through unchanged (no `defineTool` DSL conversion); only the model-facing `name` is replaced.
 2. Listen for `notifications/tools/list_changed` → re-run the same sync (dispose previous generation, register new). Deterministic names mean unchanged tools keep their names across re-syncs.
 3. The executor closes over `rawName`; the public name is never sent to the server and never parsed to recover the raw name.
-4. No `presentCall`/`presentResult` — the ACP bridge's generic-card fallback handles rendering.
+4. No `presentCall`/`presentResult` — UI consumers use the provider-neutral generic-card fallback.
 5. Tools are transparent in the system prompt — no "[via MCP]" annotation beyond the name itself.
 
 ### Public name normalization
@@ -199,7 +199,7 @@ Coverage is named per tier; each behavior lives at the cheapest tier that can ex
 
 - **Unit** (`tests/mcp-client.spec.ts`, `tests/apply.spec.ts`, mocked MCP SDK): the `publicToolName` algorithm (clean, normalize, truncate-and-hash, determinism, distinct-identity separation), raw-vs-public wire discipline, cross-server and native-tool coexistence, duplicate-`serverName` load failure and reservation release, invalid-tool-list rejection, generation swap/rollback, failed-re-sync retention, result mapping, cancellation, config schema validation. 100% per-file coverage gates the package.
 - **E2E** (`tests/mcp-client.e2e.ts`, keyless): the real MCP protocol against the in-repo fixture server, `@modelcontextprotocol/server-everything`, and `@modelcontextprotocol/server-filesystem` over stdio, and against an in-process `StreamableHTTPServerTransport` server over Streamable HTTP — discovery under the namespace, dotted-name normalization end to end, execution round-trips, duplicate-`serverName` rejection, disposal.
-- **Snapshot**: deliberately none. MCP tools introduce no new transcript surface — they register as raw `ToolDefinition`s and render through the ACP bridge's generic-card fallback, which the bridge's unit suite already pins (`packages/ui/acp/tests/stream-update.spec.ts`). Adding an MCP server to the snapshot example's `cordis.yml` would mutate the pinned `text-turn` system-prompt fixture (forcing a with-key re-record of every recorded expected output) and make every replay depend on spawning an external MCP server process — for zero new rendering behavior. If a later change gives MCP tools their own render intent, that change names its snapshot coverage then.
+- **Snapshot**: deliberately none. MCP tools introduce no new presentation shape — they register as raw `ToolDefinition`s and UI consumers use the generic-card fallback already pinned by their presentation suites. Adding an MCP server to a runnable snapshot composition would mutate its pinned system-prompt fixture and make every replay depend on spawning an external MCP server process for no new behavior. If a later change gives MCP tools their own render intent, that change names its snapshot coverage then.
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/feature/2026-07-07-plan-mode.md b/.agents/notes/implemented/feature/2026-07-07-plan-mode.md
index 06fd50e1f0..f5b76fae5b 100644
--- a/.agents/notes/implemented/feature/2026-07-07-plan-mode.md
+++ b/.agents/notes/implemented/feature/2026-07-07-plan-mode.md
@@ -4,6 +4,8 @@ Status: implemented
 
 > **Superseded vocabulary (2026-07-22):** [Collapse named session modes into plan mode](../simplification/2026-07-22-plan-specific-collaboration-state.md) replaces this note's generic `dsh-mode`, `mode/set`, definition map, and `ctx.modes` design with the current plan-specific `dsh-plan-mode`, `plan/mode`, `{ section }`, and `ctx.planMode` contract. The review, boundary, reconstructability, and sandbox-orthogonality decisions below remain in force; generic API examples are retained as the historical design this simplification removed.
 
+> **Superseded ACP mapping:** [ACP as an automation-only protocol](../simplification/2026-07-23-acp-automation-only-protocol.md) removes the picker, config-option, and elicitation mappings described below. Plan mode remains available to human-facing interfaces.
+
 ## Problem
 
 Before this change, the harness had no durable way to put one agent into a distinct working stance. Plan mode needs the agent to explore and design under planning guidance, produce a reviewable artifact, cross an explicit approval boundary, and restore that state across resume and fork without making the model-visible request diverge from the session log.
@@ -118,7 +120,7 @@ No new cordis event is declared (`mode/set` rides `session/event`; the listeners
 
 Each behind its own decision: subagent mode inheritance via a forwarded creation-time mode option (removed as unconsumed; it returns with its first consumer), preset modes beyond `plan` (read-only, accept-edits), the idle-record primitive if pending-intent loss proves real, and — the big one — **effects self-declaration on tool definitions**: a per-tool read-only/mutating classification (the MCP `ToolAnnotations` vocabulary — `readOnlyHint`/`destructiveHint` — is the natural template, with its untrusted-hint caveat implying trust tiers). That item is what a general per-mode tool policy waits on: this Agent Note first shipped an interim per-mode name allowlist and removed it before release — a hand-maintained list mislabels the effects question, must track every tool a deployment composes, and rots silently as tools arrive — so mode-scoped tool availability (and per-tool `ask` policies) returns as a CONSUMER of declared effects, which is its restart trigger.
 
-The canonical [`examples/acp-agent`](../../../../examples/acp-agent/) composition mounts the mode and question-tool plugins on the full ACP coding server; plan mode is an additive session feature, not a second server profile. Its snapshot suite pins the plan-shaped initial header, a real read, scripted approval, stable tool schemas across the pure-removal header delta, a subsequent edit, rejection feedback, and the keyless mode wire. A self-skipping real-API smoke boots that same leaf, verifies the file before approving the review, and verifies the approved implementation afterward.
+The ACP automation composition does not mount plan mode or the question tool. Human-facing compositions own plan selection and review; focused plan-mode tests and interactive-interface snapshots pin its logged state, guidance, review, and stable tool schemas.
 
 ## FAQ
 
@@ -138,13 +140,13 @@ Behavioral clarifications of the chosen design; rejected designs live in [Altern
 
 **How does plan mode relate to the sandbox's read-only mode?** They are separate axes that never touch: the mode is the collaboration stance (a `mode/set` fold), the sandbox mode is an enforcement knob (a `bash/sandbox-mode` fold, [the sandbox Agent Note](2026-07-06-sandbox.md)) — plan mode neither reads nor caps it, exactly as Codex keeps its Plan/Default presets separate from its sandbox and approval settings. A user who wants kernel-enforced read-only while planning sets both: flip the mode picker AND the sandbox-mode option, in either order; each switch changes only its own fold, so there is no interference and no restore step to crash out of. The log attributes each axis to its own event — the stance to `mode/set`, the confinement to `bash/sandbox-mode`.
 
-**Why aren't sandbox mode, approval policy, or the model themselves modes?** They are individual environment knobs and belong to ACP's `session/set_config_option`; the division this proposal pins is picker-to-modes / knobs-to-config-options, recorded in [the feature matrix](../../../../packages/ui/acp/acp-feature-support.md) now that both this stack's picker and the sandbox stack's config options are landed. A mode definition may later bundle env facts (applied through `ctx.envState` where mounted) so a Codex-style preset stays a single mode; fusing approval policy into the mode CONCEPT itself is rejected in [Alternatives considered](#alternatives-considered).
+**Why aren't sandbox mode, approval policy, or the model themselves modes?** They are individual environment knobs independent of collaboration state. The retired ACP mapping is recorded by the [automation-only protocol decision](../simplification/2026-07-23-acp-automation-only-protocol.md). A mode definition may later bundle env facts (applied through `ctx.envState` where mounted) so a Codex-style preset stays a single mode; fusing approval policy into the mode CONCEPT itself is rejected in [Alternatives considered](#alternatives-considered).
 
 ## Prior art
 
 A survey of shipped plan modes (Claude Code, Cursor, Copilot, OpenCode, Gemini CLI, Cline, Windsurf, Codex) shows the same five parts everywhere — the low-authority tool policy, plan artifact, approval moment, execution-state switch, and durable state that [Problem](#problem) builds on.
 
-The mode surface is a LIST everywhere it is advertised, never a boolean: Claude Code's picker offers `plan` beside `acceptEdits` (plus an auto-mode entry into plan), and Codex exposes `Plan` beside `Default` as collaboration-mode presets while keeping approval and sandbox settings separate. This is the surface [the ACP feature matrix](../../../../packages/ui/acp/acp-feature-support.md) records as the gap, and what sizes the vocabulary as named modes rather than a flag.
+The mode surface is a LIST everywhere it is advertised, never a boolean: Claude Code's picker offers `plan` beside `acceptEdits` (plus an auto-mode entry into plan), and Codex exposes `Plan` beside `Default` as collaboration-mode presets while keeping approval and sandbox settings separate. The ACP transport does not advertise this human-facing control.
 
 The deployment-owned example prompt borrows the instrumental behavior, not product-specific mechanics. From Codex: remain in plan mode despite imperative implementation language, explore before asking, distinguish repository facts from user-owned choices, and make the plan decision-complete across APIs, data flow, failures, tests, and assumptions. From Claude Code: prohibit mutations and commits, prefer existing patterns, use questions only for requirements or approach choices, and finish through the exit tool rather than a prose approval request. It deliberately omits Codex protocol tags and Claude's plan-file or phased-subagent machinery because those belong to their runtimes, not this plugin contract.
 
@@ -186,7 +188,7 @@ What holds now, pinned by the unit, protocol, snapshot, and real-API tiers:
 - Native tool schemas and Code Mode's SDK stay byte-identical across default, plan, and custom-mode transitions; only the configured guidance section changes.
 - Plan mode changes nothing on the enforcement axes: the toolset, the sandbox mode, escalation, and the approval policy behave identically in plan and default — pairing the mode with the independent sandbox/approval knobs is how a deployment hardens planning.
 - Mode definitions are changeable from `cordis.yml` with no code edit; the complete plan instructions are required there, while missing plan config, malformed definitions, and unknown keys fail at load and unknown mode names fail at `set()`.
-- `exit_plan_mode` is always advertised, rejects outside plan, drops only plan guidance after approval, and carries keep-planning feedback in a corrective `isError`; ACP mode updates and each surface's user-interaction provider carry the human side.
+- `exit_plan_mode` is always advertised, rejects outside plan, drops only plan guidance after approval, and carries keep-planning feedback in a corrective `isError`; each human-facing surface's user-interaction provider carries the review.
 - The docs tail shipped with the landing: READMEs, regenerated catalogs (persistence log, config, cordis services, tools), the packages map and architecture rows, and the cookbook row.
 
-The accepted costs: a pending user flip set while idle is lost if the process dies before the next turn (the UI re-applies; the idle-record primitive is the escape hatch if this bites in practice). A mode transition changes the system prompt at order 50, so the cache path from that point onward changes, but the tool schemas and Code Mode SDK no longer churn. **A mode restrains by guidance alone**: a model that ignores the section CAN mutate during plan — the review moment, the session log, and independent sandbox, approval, and filesystem policies are the containment surface. Hardening planning means setting those knobs, not widening the mode; the removed enforcement shapes and their effects-declaration restart trigger remain in [Alternatives considered](#alternatives-considered) and [Deferred](#deferred). The ACP mode surface carries the picker while sandbox, approval, and model selectors remain config options under the division pinned in the [FAQ](#faq) and [feature matrix](../../../../packages/ui/acp/acp-feature-support.md). If ACP removes session modes in favor of config options, the picker mapping can migrate without changing the logged mode state or model surface.
+The accepted costs: a pending user flip set while idle is lost if the process dies before the next turn (the UI re-applies; the idle-record primitive is the escape hatch if this bites in practice). A mode transition changes the system prompt at order 50, so the cache path from that point onward changes, but the tool schemas and Code Mode SDK no longer churn. **A mode restrains by guidance alone**: a model that ignores the section CAN mutate during plan — the review moment, the session log, and independent sandbox, approval, and filesystem policies are the containment surface. Hardening planning means setting those knobs, not widening the mode; the removed enforcement shapes and their effects-declaration restart trigger remain in [Alternatives considered](#alternatives-considered) and [Deferred](#deferred). Human-facing interfaces own the plan picker and review interaction; the ACP automation transport carries neither.
diff --git a/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.i18n.yaml b/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.i18n.yaml
index 1a8c03cb52..ad0592ae57 100644
--- a/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-16-harness-level-loop.md: 9a9511b9dcea1b5fdc90f4fc716c4399f2346967
-2026-07-16-harness-level-loop.zh.md: 284e73051eaaa4633b9f56367de9096dadc8184e
+2026-07-16-harness-level-loop.md: 15b5ce7e20b7afc429f6ff7b8a4d2d69150c22a0
+2026-07-16-harness-level-loop.zh.md: a3fabe40d36c45c715f613ce8def35faa427d3bd
diff --git a/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.md b/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.md
index 9a9511b9dc..15b5ce7e20 100644
--- a/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.md
+++ b/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.md
@@ -39,7 +39,7 @@ Time-based `/loop` or scheduled execution is a third policy and is not implement
 | `@deepseek-ai/dsh-tool-goal` | `packages/goal/tool-goal/`, model-facing consumer | Registers exclusive `get_goal`, `create_goal`, and `update_goal`; authenticates live turn provenance and narrows autonomous-round authority to completion or blocking reports with machine-routable reason codes. |
 | `@deepseek-ai/dsh-goal-session` | `packages/goal/goal-session/`, continuation policy | Reserves, fences, admits, attributes, settles, cancels, and quiescently drains same-session goal rounds without importing the concrete loop. |
 | `@deepseek-ai/dsh-commands` | `packages/ui/commands/`, UI registry | Owns `CommandDefinition`, discovery, scoped registration, direct dispatch, `CommandResult`, and request cancellation for human-only commands. |
-| `@deepseek-ai/dsh-command-goal` | `packages/goal/command-goal/`, human-command producer | Registers `/goal` status, creation, edit, pause, resume, and clear over the goal domain for TUI and ACP. |
+| `@deepseek-ai/dsh-command-goal` | `packages/goal/command-goal/`, human-command producer | Registers `/goal` status, creation, edit, pause, resume, and clear over the goal domain for TUI. |
 | `@deepseek-ai/dsh-tool-ralph` | `packages/workflow/tool-ralph/`, fixed workflow consumer | Registers `ralph({ objective, maxRounds? })`, validates the fresh structured provider and bounded `RalphRoundReport`, and returns `complete`, `blocked`, or `budget-limited`. |
 
 The detailed contracts live in the [goal-domain](2026-07-19-persisted-same-session-goal-domain.md), [model goal-tools](2026-07-19-model-facing-goal-tools.md), [goal-round driver](2026-07-19-same-session-goal-round-driver.md), [command registry](2026-07-19-plugin-command-registration.md), [human goal-command](2026-07-19-human-goal-command.md), and [Ralph workflow-tool](2026-07-19-fresh-agent-ralph-workflow-tool.md) Agent Notes.
@@ -70,7 +70,7 @@ The human UX follows the compact Codex shape in the [public OpenAI Codex TUI dis
 
 The model receives only `get_goal`, `create_goal`, and `update_goal`. It may create a goal when a direct human request clearly asks for substantial multi-round work, and it may infer that intent in any language. It must not turn routine one-turn work into a goal. Direct-human provenance is enforced in code; semantic interpretation remains model judgment. An autonomous goal round may report `complete` or `blocked` for the exact current goal round but cannot edit, pause, resume, or replace the human objective.
 
-TUI and ACP mount the shared command registry and complete goal stack by default and expose `/goal` through one producer. Every effective registered command is discoverable and invocable through every composed command adapter; a plugin incompatible with an application omits its command producer from that composition rather than relying on registry-level surface masks. The UI-less agent spine is opt-in so one-shot callers do not silently become multi-round operations. The headless CLI and JSON-RPC front doors do not consume the command plane; ordinary human text can still authorize model goal tools when that stack is composed.
+TUI mounts the shared command registry and complete goal stack by default and exposes `/goal` through one producer. ACP mounts the goal domain, model tools, and same-session driver but deliberately omits the human command plane. Every effective registered command is discoverable and invocable through every composed command adapter; a plugin incompatible with an application omits its command producer from that composition rather than relying on registry-level surface masks. The UI-less agent spine is opt-in so one-shot callers do not silently become multi-round operations. The headless CLI and JSON-RPC front doors do not consume the command plane; ordinary human text can still authorize model goal tools when that stack is composed.
 
 ### Fresh-agent Ralph execution
 
@@ -94,7 +94,7 @@ External products are comparators, not compatibility targets. The local source s
 
 ### Verification
 
-The six owning Agent Notes record unit, integration, process, snapshot, cancellation, replay, and built-runtime coverage. The stack exercises strict goal-record folding, compare-and-set races, session fork inheritance, disarmed restoration, natural-language direct-human authority, configurable caps and blocked thresholds, exact goal-round attribution, adapter-wide command discovery, and transcript isolation. Shipped keyless snapshots cover model goal creation/inspection through the headless app, multi-round same-session lifecycle and cancellation through ACP, direct `/goal` status without a model turn, and two real Ralph rounds through the headless app. The Ralph snapshot boots the worker-thread engine, spawn provider, structured-output runtime, and agent loop, then inspects distinct unseeded child logs and exact one-way bounded handoff while pinning the parent stream. Focused real-stack tests additionally cover completion, blocker and round-limit outcomes, malformed and oversized reports, ordinary child failure with the last good handoff, one phase event, and cancellation to child quiescence. Package sources remain under the repository's per-file 100% coverage gate, and built-binary tests cover installed-artifact resolution. The implementation experience is recorded in the root testing policy: every non-trivial model- or human-visible change must carry a real-example keyless snapshot in the same PR rather than relying on package-only or mock-only fixture coverage.
+The six owning Agent Notes record unit, integration, process, snapshot, cancellation, replay, and built-runtime coverage. The stack exercises strict goal-record folding, compare-and-set races, session fork inheritance, disarmed restoration, natural-language direct-human authority, configurable caps and blocked thresholds, exact goal-round attribution, adapter-wide command discovery, and transcript isolation. Shipped keyless snapshots cover model goal creation/inspection through the headless app, multi-round same-session lifecycle and cancellation through ACP, and two real Ralph rounds through the headless app; focused command tests pin direct `/goal` status without a model turn. The Ralph snapshot boots the worker-thread engine, spawn provider, structured-output runtime, and agent loop, then inspects distinct unseeded child logs and exact one-way bounded handoff while pinning the parent stream. Focused real-stack tests additionally cover completion, blocker and round-limit outcomes, malformed and oversized reports, ordinary child failure with the last good handoff, one phase event, and cancellation to child quiescence. Package sources remain under the repository's per-file 100% coverage gate, and built-binary tests cover installed-artifact resolution. The implementation experience is recorded in the root testing policy: every non-trivial model- or human-visible change must carry a real-example keyless snapshot in the same PR rather than relying on package-only or mock-only fixture coverage.
 
 ## Alternatives considered
 
@@ -126,4 +126,4 @@ The six owning Agent Notes record unit, integration, process, snapshot, cancella
 - **No goal reflector** — concern events, automatic no-progress heuristics, goal revision by an independent reflector, stuck-pattern detection, and `loop_split` are not implemented. Humans can edit, pause, clear, or resume the goal directly.
 - **Ralph policy remains narrow** — one round creates one fresh child; within-round fan-out, evaluator/worker role separation, dynamic provider/model selection, and structural recursive-Ralph tool denial need separate policy surfaces. Prompt guidance is not enforcement.
 - **Ralph does not retry a failed child** — an ordinary failure preserves the failed round and last good handoff, while fatal workflow infrastructure failures can end before that state is available. Retry count, backoff, and richer failure transport need separate policy and seam design.
-- **Portable UI remains modest** — TUI and ACP render plain-text goal status and generic Ralph cards. There is no continuous status widget, reconnectable command output, modal goal editor, or command plane in the headless CLI or JSON-RPC front doors.
+- **Portable UI remains modest** — TUI renders plain-text goal status and generic Ralph cards. ACP carries only committed assistant text; there is no continuous status widget, reconnectable command output, modal goal editor, or command plane in ACP, the headless CLI, or JSON-RPC.
diff --git a/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.zh.md b/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.zh.md
index 284e73051e..a3fabe40d3 100644
--- a/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-16-harness-level-loop.zh.md
@@ -39,7 +39,7 @@ Status: implemented
 | `@deepseek-ai/dsh-tool-goal` | `packages/goal/tool-goal/`，面向模型消费者 | 注册互斥的 `get_goal`、`create_goal` 与 `update_goal`；认证实时 Turn 来源，并把自治 Round 权限收窄到带机器可路由原因代码的完成或阻塞报告。 |
 | `@deepseek-ai/dsh-goal-session` | `packages/goal/goal-session/`，续行策略 | 在不导入具体 loop 的情况下，预留、设围栏、接纳、归属、结算、取消并静止排空同会话目标回合。 |
 | `@deepseek-ai/dsh-commands` | `packages/ui/commands/`，UI 注册表 | 拥有面向人类专用命令的 `CommandDefinition`、发现、作用域注册、直接分发、`CommandResult` 与请求取消。 |
-| `@deepseek-ai/dsh-command-goal` | `packages/goal/command-goal/`，人类命令生产方 | 为 TUI 和 ACP 注册构建在目标领域之上的 `/goal` 状态、创建、编辑、暂停、恢复与清除。 |
+| `@deepseek-ai/dsh-command-goal` | `packages/goal/command-goal/`，人类命令生产方 | 为 TUI 注册构建在目标领域之上的 `/goal` 状态、创建、编辑、暂停、恢复与清除。 |
 | `@deepseek-ai/dsh-tool-ralph` | `packages/workflow/tool-ralph/`，固定工作流消费者 | 注册 `ralph({ objective, maxRounds? })`，验证全新结构化 provider 与有界 `RalphRoundReport`，并返回 `complete`、`blocked` 或 `budget-limited`。 |
 
 详细契约分别由[目标领域](2026-07-19-persisted-same-session-goal-domain.md)、[模型目标工具](2026-07-19-model-facing-goal-tools.md)、[目标回合驱动器](2026-07-19-same-session-goal-round-driver.md)、[命令注册表](2026-07-19-plugin-command-registration.md)、[人类目标命令](2026-07-19-human-goal-command.md)与 [Ralph 工作流工具](2026-07-19-fresh-agent-ralph-workflow-tool.md) Agent Note 拥有。
@@ -70,7 +70,7 @@ fork 会话会继承持久目标前缀，因为这是自然的重放结果。for
 
 模型只接收 `get_goal`、`create_goal` 和 `update_goal`。当直接人类请求清楚要求大量多 Round 工作时，模型可以创建目标，并且可以从任何语言推断该意图。它不得把日常单 Turn 工作变成目标。直接人类来源由代码强制执行；语义解释仍是模型判断。自治目标 Round 可以为准确当前目标 Round 报告 `complete` 或 `blocked`，但不能编辑、暂停、恢复或替换人类目标。
 
-TUI 与 ACP 默认挂载共享命令注册表和完整目标栈，并通过同一个生产方暴露 `/goal`。每条有效已注册命令都能被每个已组合的命令适配器发现和调用；若插件与某应用不兼容，该应用组合会省略其命令生产方，而不是依赖注册表层面的表面掩码。无 UI agent spine 要求显式选择加入，以免单次调用方静默变成多 Round 操作。无头 CLI 与 JSON-RPC 前端不消费命令平面；挂载目标栈后，普通人类文本仍可授权模型目标工具。
+TUI 默认挂载共享命令注册表和完整目标栈，并通过一个生产方暴露 `/goal`。ACP 挂载目标领域、模型工具和同会话驱动器，但有意省略人类命令平面。每条有效已注册命令都能被每个已组合的命令适配器发现和调用；若插件与某应用不兼容，该应用组合会省略其命令生产方，而不是依赖注册表层面的表面掩码。无 UI agent spine 要求显式选择加入，以免单次调用方静默变成多 Round 操作。无头 CLI 与 JSON-RPC 前端不消费命令平面；挂载目标栈后，普通人类文本仍可授权模型目标工具。
 
 ### 全新 agent Ralph 执行
 
@@ -94,7 +94,7 @@ Codex 提供了这里采用的最小可观察目标 UX：一个附着于聊天
 
 ### 验证
 
-六份所属 Agent Note 记录了单元、集成、进程、快照、取消、重放与构建后运行时覆盖。该栈验证严格目标记录折叠、比较并交换竞争、会话 fork 继承、恢复后未激活、自然语言直接人类权限、可配置上限与阻塞阈值、准确目标回合归属、适配器范围的命令发现与转录隔离。已发布的无密钥快照覆盖通过无头应用创建/检查模型目标、通过 ACP 执行多 Round 同会话生命周期与取消、无需模型 Turn 的直接 `/goal` 状态，以及通过无头应用执行两个真实 Ralph Round。Ralph 快照会启动工作线程引擎、spawn provider、结构化输出运行时与 agent loop，随后检查互不相同且无种子的子日志和准确单向有界交接，同时固定父级事件流。聚焦的真实栈测试还覆盖完成、阻塞与 Round 上限结果、畸形及过大报告、保留上一份有效交接的普通子 agent 失败、单个阶段事件，以及取消后达到子 agent 静止状态。包源码继续受仓库逐文件 100% 覆盖率门禁约束，构建后二进制测试覆盖已安装产物解析。实现经验已记录进根测试策略：每项非平凡的模型或人类可见变更都必须在同一 PR 中携带真实示例无密钥快照，而不能依赖仅包级或仅模拟夹具的覆盖。
+六份所属 Agent Note 记录了单元、集成、进程、快照、取消、重放与构建后运行时覆盖。该栈验证严格目标记录折叠、比较并交换竞争、会话 fork 继承、恢复后未激活、自然语言直接人类权限、可配置上限与阻塞阈值、准确目标回合归属、适配器范围的命令发现与转录隔离。已发布的无密钥快照覆盖通过无头应用创建/检查模型目标、通过 ACP 执行多 Round 同会话生命周期与取消，以及通过无头应用执行两个真实 Ralph Round；聚焦的命令测试固定了无需模型 Turn 的直接 `/goal` 状态。Ralph 快照会启动工作线程引擎、spawn provider、结构化输出运行时与 agent loop，随后检查互不相同且无种子的子日志和准确单向有界交接，同时固定父级事件流。聚焦的真实栈测试还覆盖完成、阻塞与 Round 上限结果、畸形及过大报告、保留上一份有效交接的普通子 agent 失败、单个阶段事件，以及取消后达到子 agent 静止状态。包源码继续受仓库逐文件 100% 覆盖率门禁约束，构建后二进制测试覆盖已安装产物解析。实现经验已记录进根测试策略：每项非平凡的模型或人类可见变更都必须在同一 PR 中携带真实示例无密钥快照，而不能依赖仅包级或仅模拟夹具的覆盖。
 
 ## 考虑过的替代方案
 
@@ -126,4 +126,4 @@ Codex 提供了这里采用的最小可观察目标 UX：一个附着于聊天
 - **没有目标反思器**——concern 事件、自动无进展启发式、由独立反思器执行的目标修订、卡住模式检测与 `loop_split` 均未实现。人类可以直接编辑、暂停、清除或恢复目标。
 - **Ralph 策略仍然狭窄**——一个 Round 创建一个全新子 agent；Round 内扇出、评估器/工作者角色分离、动态 provider/模型选择与结构化递归 Ralph 工具禁止都需要独立策略表面。提示词指导不是强制执行。
 - **Ralph 不会重试失败的子 agent**——普通失败会保留失败 Round 与上一份有效交接，而致命工作流基础设施错误可能在该状态可用前结束。重试次数、退避与更丰富的失败传输需要独立的策略与接缝设计。
-- **可移植 UI 仍较朴素**——TUI 与 ACP 渲染纯文本目标状态和通用 Ralph 卡片。系统没有持续状态组件、可重连命令输出、模态目标编辑器，无头 CLI 与 JSON-RPC 前端也没有命令平面。
+- **可移植 UI 仍较朴素**——TUI 渲染纯文本目标状态和通用 Ralph 卡片。ACP 只承载已提交的助手文本；系统没有持续状态组件、可重连命令输出、模态目标编辑器，ACP、无头 CLI 与 JSON-RPC 也没有命令平面。
diff --git a/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.i18n.yaml b/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.i18n.yaml
index be66b14fbf..f7e242b78c 100644
--- a/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-16-persistent-pty-sessions.md: b33993d36753d3195ec52d3b38dda62746a47bf3
-2026-07-16-persistent-pty-sessions.zh.md: 6ed330d75824a4e6fca9de0d82db61a7c6543322
+2026-07-16-persistent-pty-sessions.md: 148d4a2f47689e38a3ec83a7a41e4f75c4b73d95
+2026-07-16-persistent-pty-sessions.zh.md: 9a9d9cd4b0f61e8abaf011996ecd8739d13851f8
diff --git a/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.md b/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.md
index b33993d367..148d4a2f47 100644
--- a/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.md
+++ b/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.md
@@ -24,7 +24,7 @@ The implementation supports interactive shells and line-oriented REPLs on Linux
 |---|---|---|
 | `dsh-pty` | `PtyService`, branded `PtySessionId`, backend registry, owner-scoped session contract, and result types | `ctx.pty` |
 | `dsh-pty-local` | [`node-pty`](https://github.com/microsoft/node-pty)-based local backend, platform process inspection, bounded terminal buffer, sandbox resolution, and process-tree supervision | registers a backend on `ctx.pty` |
-| `dsh-tool-pty` | Six model-facing tools, task-runtime integration for background sends, guidance, and ACP render intents | registers on `ctx.tools` |
+| `dsh-tool-pty` | Six model-facing tools, task-runtime integration for background sends, guidance, and UI render intents | registers on `ctx.tools` |
 
 Idle detection is backend behavior, not a second public seam. A remote or container backend may have authoritative readiness signals that do not resemble local `/proc` inspection; every `PtyBackend` therefore returns the common send result while owning its detection mechanism internally.
 
@@ -58,7 +58,7 @@ The implementation uses only public `node-pty` capabilities: child PID, `data` a
 | `terminal_close` | Close one session and await process-tree quiescence | `{ killed }` |
 | `terminal_list` | List the caller's live sessions | owner-scoped session summaries |
 
-The ACP render contract is exact and location-free. `terminal_send` uses terminal call/result cards only for foreground sends; its background form is generic `execute`. `terminal_open`, `terminal_read`, `terminal_signal`, `terminal_close`, and `terminal_list` use generic `execute`, `read`, `execute`, `delete`, and `read` cards respectively. No PTY tool emits `locations`.
+The UI render contract is exact and location-free. `terminal_send` uses terminal call/result cards only for foreground sends; its background form is generic `execute`. `terminal_open`, `terminal_read`, `terminal_signal`, `terminal_close`, and `terminal_list` use generic `execute`, `read`, `execute`, `delete`, and `read` cards respectively. No PTY tool emits `locations`.
 
 `terminal_send({ sessionId, text, submit?, run_in_background? })` treats `text` as UTF-8 bytes and resolves `submit` to `true` in the tool implementation. When `submit` is true it writes the platform Enter sequence after the text; when false it writes only the text, allowing control characters and REPL fragments without hidden content heuristics. `enableRunInBackground` defaults to true; false removes `run_in_background` from the schema and rejects the same undeclared argument if a caller forces it through execution.
 
@@ -155,7 +155,7 @@ The package ships concise tool guidance explaining persistent state, owner isola
 - Per-file coverage pins owner fencing, concurrent reservations, unpublished-spawn cancellation and awaited teardown, sandbox-mode change rejection, retriable lifecycle cleanup, readiness tiers, sanitizer carry state, complete UTF-8 bounds, task integration, schemas, and exact render intents.
 - Linux process fixtures cover non-leader and non-main-thread stdin waits, zombie quiescence, unreadable process state, supported syscall tables, unsupported architectures, and false-positive rejection; macOS inspector logic is injected into the same unit suite.
 - Real `node-pty` tests exercise shell state, shared sandbox policy, environment scrubbing, raw-mode foreground `SIGINT`, a TERM-ignoring descendant, and immediate post-disposal quiescence on supported hosts.
-- A Loader-driven `cordis.yml` test mounts the real three-package composition, while ACP and headless snapshots pin the six schemas, bounded results, error rendering, and terminal/generic cards through opt-in overlays.
+- A Loader-driven `cordis.yml` test mounts the real three-package composition. ACP and headless snapshots pin the six schemas, bounded results, and errors through opt-in overlays; TUI snapshots pin terminal and generic card presentation.
 - Package contracts, the architecture map, core data structures, generated catalogs, and the website API describe the same shipped surface.
 - The repository CI-equivalent sequence owns type, lint, coverage, snapshot, documentation, build, hygiene, demo, and built-entry verification.
 
diff --git a/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.zh.md b/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.zh.md
index 6ed330d758..9a9d9cd4b0 100644
--- a/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-16-persistent-pty-sessions.zh.md
@@ -24,7 +24,7 @@ harness 可以运行前台与后台命令、编辑文件和委派工作，但无
 |---|---|---|
 | `dsh-pty` | `PtyService`、branded `PtySessionId`、后端注册表、按 owner 隔离的会话契约和结果类型 | `ctx.pty` |
 | `dsh-pty-local` | 基于 [`node-pty`](https://github.com/microsoft/node-pty) 的本地后端、平台进程检查、有界终端缓冲、沙箱解析和进程树监管 | 在 `ctx.pty` 上注册后端 |
-| `dsh-tool-pty` | 6 个面向模型的工具、后台发送的 task 运行时集成、使用指引和 ACP render intent | 注册到 `ctx.tools` |
+| `dsh-tool-pty` | 6 个面向模型的工具、后台发送的 task 运行时集成、使用指引和 UI 渲染意图 | 注册到 `ctx.tools` |
 
 idle 检测属于后端行为，不是第二条公共 seam。远程或容器后端可能拥有完全不同于本地 `/proc` 检查的权威就绪信号；因此每个 `PtyBackend` 都返回统一的发送结果，同时在内部拥有自己的检测机制。
 
@@ -58,7 +58,7 @@ agent scope dispose 时先关闭注册，再等待全部所属 PTY 静默退出
 | `terminal_close` | 关闭一个会话并等待进程树静默退出 | `{ killed }` |
 | `terminal_list` | 列出调用方的活会话 | 按 owner 隔离的会话摘要 |
 
-ACP 渲染契约精确且不携带位置信息。`terminal_send` 只为前台发送使用 terminal 调用卡片和结果卡片；后台形式使用通用 `execute` 卡片。`terminal_open`、`terminal_read`、`terminal_signal`、`terminal_close` 和 `terminal_list` 分别使用通用 `execute`、`read`、`execute`、`delete` 和 `read` 卡片。所有 PTY 工具都不发出 `locations`。
+UI 渲染契约精确且不携带位置信息。`terminal_send` 只为前台发送使用 terminal 调用卡片和结果卡片；后台形式使用通用 `execute` 卡片。`terminal_open`、`terminal_read`、`terminal_signal`、`terminal_close` 和 `terminal_list` 分别使用通用 `execute`、`read`、`execute`、`delete` 和 `read` 卡片。所有 PTY 工具都不发出 `locations`。
 
 `terminal_send({ sessionId, text, submit?, run_in_background? })` 将 `text` 视为 UTF-8 字节，并由工具实现在解析阶段把 `submit` 默认成 `true`。`submit` 为 true 时先写入文本，再写入平台 Enter 序列；为 false 时只写文本，使控制字符和 REPL 片段无需隐藏的内容启发式即可发送。`enableRunInBackground` 默认为 true；设为 false 时，schema 中会移除 `run_in_background`，调用方即使强行把这个未声明参数传入执行流程，也会被拒绝。
 
@@ -122,7 +122,7 @@ plugins:
       maxResultBytes: 262144
 ```
 
-包提供简洁的工具指引，说明持久状态、owner 隔离、不确定的 idle 结果、清理，以及无需交互时优先使用现有一次性工具。已发布的基础示例不挂载 PTY：PTY 仅通过专用组合 opt-in，ACP 与 headless 快照 overlay 覆盖该组合。`dsh-tool-pty` 实例一旦启用，6 个工具和 `run_in_background` 就会默认启用；部署可通过配置仅禁用后台参数。
+包提供简洁的工具指引，说明持久状态、owner 隔离、不确定的 idle 结果、清理，以及无需交互时优先使用现有一次性工具。已发布的基础示例不挂载 PTY：PTY 仅通过专用组合 opt-in，ACP（Agent Client Protocol）与 headless 快照 overlay 覆盖该组合。`dsh-tool-pty` 实例一旦启用，6 个工具和 `run_in_background` 就会默认启用；部署可通过配置仅禁用后台参数。
 
 ### 推迟的工作
 
@@ -155,7 +155,7 @@ plugins:
 - 每文件覆盖率固定 owner 隔离、并发预留、未发布 spawn 的取消与等待式 teardown、沙箱模式变更拒绝、可重试的生命周期清理、就绪层级、sanitizer carry state、完整 UTF-8 结果上限、task 集成、schema 和精确 render intent。
 - Linux 进程 fixture 覆盖非 leader 与非主线程的 stdin 等待、僵尸进程静止性、不可读进程状态、受支持的 syscall 表、不支持的架构和误报拒绝；同一单元测试套件通过注入覆盖 macOS 检查器逻辑。
 - 真实 `node-pty` 测试在受支持宿主上覆盖 shell 状态、共享沙箱策略、环境清洗、raw mode 下的前台 `SIGINT`、忽略 `SIGTERM` 的子进程，以及 dispose 返回后立即静默。
-- Loader 驱动的 `cordis.yml` 测试挂载真实三包组合；ACP 与 headless 快照通过 opt-in overlay 固定 6 个 schema、有界结果、错误渲染和 terminal/generic card。
+- Loader 驱动的 `cordis.yml` 测试挂载真实三包组合。ACP 与 headless 快照通过 opt-in overlay 固定 6 个 schema、有界结果和错误；TUI 快照固定 terminal 与 generic 卡片展示。
 - 包契约、架构图、核心数据结构、生成目录和 website API 描述同一个已发布接口。
 - 仓库 CI 等价序列负责类型、lint、覆盖率、快照、文档、构建、hygiene、demo 和 built-entry 验证。
 
diff --git a/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.i18n.yaml b/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.i18n.yaml
index 8d6c7be831..79a4f5e7cc 100644
--- a/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-17-dedicated-full-screen-tui-front-door.md: ecfda138593fc2b98ac42929acc586b11e437ee2
-2026-07-17-dedicated-full-screen-tui-front-door.zh.md: 6b8cc63f7657672a6da542e2033d765b54bd4f07
+2026-07-17-dedicated-full-screen-tui-front-door.md: aac67ffec89606d04d5abfd233d0469e2241b102
+2026-07-17-dedicated-full-screen-tui-front-door.zh.md: 0f64e2ce14b18d315f75913b82c731e77758e377
diff --git a/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.md b/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.md
index ecfda13859..aac67ffec8 100644
--- a/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.md
+++ b/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.md
@@ -14,7 +14,7 @@ The interactive channel must remain a Cordis plugin over the same agent, session
 
 DeepSeek Harness ships [`@deepseek-ai/dsh-tui`](../../../../packages/ui/tui/README.md) as a dedicated Cordis plugin. It owns terminal input and presentation only; agent lifecycle, session persistence, tool execution, and the model-facing question tool remain separate composition entries. The plugin requires both stdin and stdout to be TTYs and fails instead of silently changing to line-oriented behavior.
 
-The app layer has one terminal front door. `@deepseek-ai/dsh-tui-demo` mounts the TUI before the configured agent, and `examples/tui-agent` owns the interactive coding composition and Code Mode overlay directly. Non-interactive tasks use `@deepseek-ai/dsh-cli-demo`; ACP remains a separate editor protocol.
+The app layer has one terminal front door. `@deepseek-ai/dsh-tui-demo` mounts the TUI before the configured agent, and `examples/tui-agent` owns the interactive coding composition and Code Mode overlay directly. Non-interactive tasks use `@deepseek-ai/dsh-cli-demo`; ACP remains a separate automation protocol.
 
 The selected front door receives the exact generated or resumed `SessionId` used by the pre-created agent. It mounts before the agent composition, waits for the matching root agent, and enters full-screen mode only after that agent exists. A matching `agent-loop/config-start-failed` event is therefore reported before screen takeover and exits with status 1.
 
diff --git a/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.zh.md b/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.zh.md
index 6b8cc63f76..0f64e2ce14 100644
--- a/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.zh.md
@@ -14,7 +14,7 @@ Status: implemented
 
 DeepSeek Harness 将 [`@deepseek-ai/dsh-tui`](../../../../packages/ui/tui/README.md) 作为独立的 Cordis 插件交付。该插件只负责终端输入与呈现；agent 生命周期、会话持久化、工具执行以及模型可见的提问工具仍由不同组合项负责。插件要求 stdin 和 stdout 均为 TTY；条件不满足时会失败，不会静默切换为逐行输出。
 
-应用组合层只有一个终端入口。`@deepseek-ai/dsh-tui-demo` 在已配置 agent 之前挂载 TUI，`examples/tui-agent` 直接拥有交互式 coding 组装及其 Code Mode overlay。非交互任务使用 `@deepseek-ai/dsh-cli-demo`；ACP 仍是独立的编辑器协议。
+应用组合层只有一个终端入口。`@deepseek-ai/dsh-tui-demo` 在已配置 agent 之前挂载 TUI，`examples/tui-agent` 直接拥有交互式 coding 组装及其 Code Mode overlay。非交互任务使用 `@deepseek-ai/dsh-cli-demo`；ACP 仍是独立的自动化协议。
 
 所选入口接收预创建 agent 使用的同一个新建或恢复 `SessionId`。入口先于 agent 组合挂载，等待相符的根 agent 出现，然后才进入全屏模式。因此，相符的 `agent-loop/config-start-failed` 事件会在接管屏幕前报告，并以状态码 1 退出。
 
diff --git a/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.i18n.yaml b/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.i18n.yaml
index 17e3cdf5e2..67b6b8da3d 100644
--- a/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-19-fresh-agent-ralph-workflow-tool.md: c2db4d7dd30c27a25adecdfc425db261cc3dfeb5
-2026-07-19-fresh-agent-ralph-workflow-tool.zh.md: e33e9848d71c98c8f83494ebe8bf171ef10b9305
+2026-07-19-fresh-agent-ralph-workflow-tool.md: 6fe96587c49ef0316d1618fda2ee26b015b1ce87
+2026-07-19-fresh-agent-ralph-workflow-tool.zh.md: c615c16ac020a0c905f6c8b52d8dc487fbcfe8be
diff --git a/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.md b/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.md
index c2db4d7dd3..6fe96587c4 100644
--- a/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.md
+++ b/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.md
@@ -40,7 +40,7 @@ The workflow language maps a normally settled but unsuccessful child to `null`.
 
 The model may supply only `objective` and optional `maxRounds`; provider selection, report schema, handoff cap, and script are deployment-owned. A fixed prompt section says to use `ralph` only when the direct human explicitly asks for Ralph or fresh-agent iteration, and distinguishes it from same-session goals, bounded delegation, and general fan-out workflows. This is guidance rather than a new goal UX state machine.
 
-ACP and terminal presentation use a generic `ralph` card whose raw input is the objective. Successful completion and blocker envelopes say that a worker reported the outcome rather than presenting it as independent certification. The parent transcript retains the original tool call and one bounded successful terminal report or an error, not intermediate child messages. Shipped headless, TUI, and ACP compositions load the plugin beside the existing workflow engine; JSON-RPC remains unchanged because its default composition does not expose workflows.
+Human-facing presentation uses a generic `ralph` card whose raw input is the objective; ACP carries only the committed assistant text. Successful completion and blocker envelopes say that a worker reported the outcome rather than presenting it as independent certification. The parent transcript retains the original tool call and one bounded successful terminal report or an error, not intermediate child messages. Shipped headless, TUI, and ACP compositions load the plugin beside the existing workflow engine; JSON-RPC remains unchanged because its default composition does not expose workflows.
 
 ## Testing
 
diff --git a/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.zh.md b/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.zh.md
index e33e9848d7..c615c16ac0 100644
--- a/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-19-fresh-agent-ralph-workflow-tool.zh.md
@@ -40,7 +40,7 @@ Ralph 插件的 `subagentProvider` 默认为 `spawn`。每次调用前，它要
 
 模型只能提供 `objective` 和可选的 `maxRounds`；provider 选择、报告 schema、交接上限和脚本都由部署拥有。固定提示区段说明，只有直接人类明确要求 Ralph 或全新 agent 迭代时才使用 `ralph`，并将其与同会话目标、有界委派和通用扇出工作流区分开。这是指导，而不是新的目标 UX 状态机。
 
-ACP 和终端展示使用通用 `ralph` 卡片，并把目标作为原始输入。成功完成与阻塞的外层文本会说明结果由工作者报告，而不会把它呈现为独立认证。父转录只保留原始工具调用，以及一份有界成功终止报告或一个错误，不包含中间子 agent 消息。发布的无头、TUI 与 ACP 组合会在现有工作流引擎旁加载该插件；JSON-RPC 保持不变，因为其默认组合不暴露工作流。
+面向人类的展示使用通用 `ralph` 卡片，并把目标作为原始输入；ACP 只承载已提交的助手文本。成功完成与阻塞的外层文本会说明结果由工作者报告，而不会把它呈现为独立认证。父转录只保留原始工具调用，以及一份有界成功终止报告或一个错误，不包含中间子 agent 消息。发布的无头、TUI 与 ACP 组合会在现有工作流引擎旁加载该插件；JSON-RPC 保持不变，因为其默认组合不暴露工作流。
 
 ## 测试
 
diff --git a/.agents/notes/implemented/feature/2026-07-19-human-goal-command.i18n.yaml b/.agents/notes/implemented/feature/2026-07-19-human-goal-command.i18n.yaml
index 5379f25772..44e1412cc4 100644
--- a/.agents/notes/implemented/feature/2026-07-19-human-goal-command.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-19-human-goal-command.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-19-human-goal-command.md: a272206a3bfad50a01ce871c56c7e7bcf924684e
-2026-07-19-human-goal-command.zh.md: 370c9bc24510320c70e3d789926c492e543968b1
+2026-07-19-human-goal-command.md: ce5c37fd28f9432d8c9a8797cac32c632617e317
+2026-07-19-human-goal-command.zh.md: d5ce36bd75a6f1070ee1eaeb1ac6ee97778c246b
diff --git a/.agents/notes/implemented/feature/2026-07-19-human-goal-command.md b/.agents/notes/implemented/feature/2026-07-19-human-goal-command.md
index a272206a3b..ce5c37fd28 100644
--- a/.agents/notes/implemented/feature/2026-07-19-human-goal-command.md
+++ b/.agents/notes/implemented/feature/2026-07-19-human-goal-command.md
@@ -6,7 +6,7 @@ English | [中文](2026-07-19-human-goal-command.zh.md)
 
 ## Problem
 
-The same-session goal domain and model tools provide the state machine and semantic natural-language path, but they are not a sufficient human UX. A user needs to inspect the exact current phase and round budget without asking the model, explicitly pause or clear work without spending a model turn, and rearm a restored active goal after the required post-resume human decision. Implementing those actions independently in TUI and ACP would duplicate parsing, let the surfaces drift, and risk routing an unknown or unavailable command into the model.
+The same-session goal domain and model tools provide the state machine and semantic natural-language path, but they are not a sufficient human UX. A user needs to inspect the exact current phase and round budget without asking the model, explicitly pause or clear work without spending a model turn, and rearm a restored active goal after the required post-resume human decision. Implementing those actions independently in each UI would duplicate parsing, let the surfaces drift, and risk routing an unknown or unavailable command into the model.
 
 The command must also respect the goal design's two kinds of state. Durable phase, objective, revisions, and rounds come from the session log; process-local activation decides whether an active goal may continue automatically. Showing only “active” after a resume would be misleading when the restored goal is intentionally disarmed and waiting for human authorization.
 
@@ -22,7 +22,7 @@ The command follows the compact Codex shape in the [public OpenAI Codex TUI disp
 
 `/goal <objective>` creates an active armed goal. A completed goal may be replaced, which creates a fresh goal identity through the existing domain rule. Any unfinished goal makes the command fail directly with instructions to use inline edit or explicit clear. The generic command service deliberately has no modal confirmation API, so silently clearing and creating two durable records would manufacture destructive consent and expose a non-atomic failure window.
 
-`/goal edit <objective>` edits the current non-complete goal without changing phase or activation. On a completed goal it creates a fresh active goal because the domain does not permit completed state to resume and a new completion objective is a new goal identity. Bare `edit` is an error rather than an editor launch because ACP's shared unstructured command contract has no portable modal editor.
+`/goal edit <objective>` edits the current non-complete goal without changing phase or activation. On a completed goal it creates a fresh active goal because the domain does not permit completed state to resume and a new completion objective is a new goal identity. Bare `edit` is an error rather than an editor launch because the portable unstructured command contract has no modal editor.
 
 `/goal pause`, `/goal resume`, and `/goal clear` call the matching compare-and-set domain verbs against the current view. Resume covers both stopped durable phases and an active-but-disarmed goal after session resume, fork, or driver replacement. Domain rules still reject exhausted round caps, redundant active/armed resume, invalid phase transitions, and stale identity. Clear removes the current pointer while the session log retains the revisioned tombstone and earlier snapshots.
 
@@ -40,16 +40,16 @@ Generic slash input, status text, and errors are not persisted. Successful goal
 
 `agent-spine-demo` accepts an optional `goals` composition object containing the goal-domain and model-tool owner configs. Omission or `false` leaves the stack unmounted. This explicit opt-in is important for headless one-shot callers: their result API settles one correlated physical turn and must not silently become a long-running logical goal operation.
 
-The interactive app bundles make the opposite product choice. ACP and TUI default `goals` to the owner defaults and mount the goal domain, model tools, same-session driver, command registry, and this producer. Both apps accept `goals: false` as one coherent stack opt-out. The Python SDK runtime closure ships this producer alongside ACP, commands, and the goal stack so an external `cordis.yml` can compose the same command.
+The TUI app bundle makes the opposite product choice. It defaults `goals` to the owner defaults and mounts the goal domain, model tools, same-session driver, command registry, and this producer; `goals: false` removes the stack coherently. The [ACP automation app](../simplification/2026-07-23-acp-automation-only-protocol.md) also defaults the goal domain and model tools but deliberately omits command services. The Python SDK runtime closure ships this producer, commands, and the goal stack so an external `cordis.yml` can compose the same command.
 
 ## Testing
 
-The producer suite uses the real command registry, goal service, agent registry, and session log. It covers Loader-safe exports, registry discovery, disposal, empty status, objective parsing, unfinished replacement refusal, inline edit, completed replacement, all missing-state controls, pause/resume/clear, every durable phase, blocked code/explanation presentation, armed/disarmed presentation, sanitized domain errors, unexpected failures, and persisted mutation records. App composition tests cover explicit spine opt-in, TUI/ACP defaults, coherent opt-out, forwarded domain/tool config, command discovery, the packaged-runtime closure, and the expanded model-tool assembly. A keyless snapshot boots the shipped ACP application, observes its advertised `/goal` metadata, invokes `/goal` directly, and pins the no-model-turn result; the surrounding ACP snapshots also pin the goal tool schemas in that composition.
+The producer suite uses the real command registry, goal service, agent registry, and session log. It covers Loader-safe exports, registry discovery, disposal, empty status, objective parsing, unfinished replacement refusal, inline edit, completed replacement, all missing-state controls, pause/resume/clear, every durable phase, blocked code/explanation presentation, armed/disarmed presentation, sanitized domain errors, unexpected failures, and persisted mutation records. App composition tests cover explicit spine opt-in, TUI defaults, coherent opt-out, forwarded domain/tool config, command discovery, the packaged-runtime closure, and the expanded model-tool assembly. ACP backend snapshots continue to pin the goal tool schemas independently of this human command.
 
 ## Alternatives considered
 
-- **Let the model handle `/goal` as ordinary text** — rejected because status and direct lifecycle actions would cost a model turn, could be reinterpreted, and would not provide deterministic ACP discovery.
-- **Implement separate TUI and ACP handlers** — rejected because grammar, error behavior, and goal-state formatting would drift and optional deployments could not add or remove the capability as one effect.
+- **Let the model handle `/goal` as ordinary text** — rejected because status and direct lifecycle actions would cost a model turn, could be reinterpreted, and would not provide deterministic command discovery.
+- **Implement separate handlers in each UI** — rejected because grammar, error behavior, and goal-state formatting would drift and optional deployments could not add or remove the capability as one effect.
 - **Add modal editing and replacement confirmation to `ctx.commands`** — rejected because the existing cross-surface contract is unstructured input plus direct output; a general interaction protocol needs more than this one producer.
 - **Silently replace an unfinished goal** — rejected because it combines clear and create without atomicity or explicit destructive intent.
 - **Expose goal id and revision in human status** — rejected because human actions always target the exact current view inside one synchronous handler; those fields add implementation noise without preventing another race.
@@ -57,7 +57,7 @@ The producer suite uses the real command registry, goal service, agent registry,
 
 ## Consequences
 
-- TUI and ACP expose one Codex-shaped `/goal` command supplied by a removable plugin.
+- TUI exposes one Codex-shaped `/goal` command supplied by a removable plugin.
 - Human status distinguishes durable phase from live activation and reports the exact goal-round cap.
 - Direct pause, resume, clear, creation, and edit consume no model turn while their accepted mutations remain reconstructable from the session log.
 - Restored sessions wait for a human decision; `/goal resume` is the literal command path, while an ordinary prompt in any language may authorize the model tool path.
@@ -67,6 +67,6 @@ The producer suite uses the real command registry, goal service, agent registry,
 
 - The portable command contract has no modal editor or confirmation interaction; inline edit and explicit clear are intentional until a general cross-surface interaction primitive exists.
 - `/goal` does not accept a per-command round cap. Deployment config owns the default, and the authorized model tool can edit a cap after direct human instruction.
-- TUI and ACP render portable plain text rather than a continuously updated goal status widget. Reconnectable command output and adapter-specific status indicators are deferred.
-- The headless CLI and JSON-RPC front doors do not consume the command registry.
+- TUI renders portable plain text rather than a continuously updated goal status widget. Reconnectable command output and adapter-specific status indicators are deferred.
+- The ACP automation server, headless CLI, and JSON-RPC front doors do not consume the command registry.
 - The command observes and mutates state but does not certify completion or blockers. Evaluator-backed certification remains deferred to a separate policy layer with an explicit authority and isolation contract.
diff --git a/.agents/notes/implemented/feature/2026-07-19-human-goal-command.zh.md b/.agents/notes/implemented/feature/2026-07-19-human-goal-command.zh.md
index 370c9bc245..d5ce36bd75 100644
--- a/.agents/notes/implemented/feature/2026-07-19-human-goal-command.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-19-human-goal-command.zh.md
@@ -6,7 +6,7 @@ Status: implemented
 
 ## 问题
 
-同会话目标领域和模型工具提供了状态机与自然语言语义路径，但尚不足以构成面向人类的 UX。用户需要在不询问模型的情况下检查准确的当前阶段与回合预算，在不消耗模型轮次的情况下明确暂停或清除工作，并在会话恢复后经过必要的人类决策重新激活已恢复的活跃目标。若在 TUI 与 ACP 中分别实现这些操作，就会重复解析逻辑、导致两个表面发生偏差，还可能把未知或不可用的命令交给模型处理。
+同会话目标领域和模型工具提供了状态机与自然语言语义路径，但尚不足以构成面向人类的 UX。用户需要在不询问模型的情况下检查准确的当前阶段与回合预算，在不消耗模型轮次的情况下明确暂停或清除工作，并在会话恢复后经过必要的人类决策重新激活已恢复的活跃目标。若在各 UI 中分别实现这些操作，就会重复解析逻辑、导致各界面发生偏差，还可能把未知或不可用的命令交给模型处理。
 
 该命令还必须遵守目标设计中的两类状态。持久阶段、目标描述、修订号与回合来自会话日志；进程本地激活态决定活跃目标能否自动继续。恢复后若只显示“活跃”，就会掩盖目标已被有意设为未激活、正在等待人类授权这一事实。
 
@@ -22,7 +22,7 @@ Status: implemented
 
 `/goal <objective>` 创建活跃且已激活的目标。已完成目标可以被替换，此时通过现有领域规则创建新的目标身份。任何未完成目标都会让命令直接失败，并提示用户使用行内编辑或明确清除。通用命令服务有意不提供模态确认 API；若静默执行清除再创建两条持久记录，就等于凭空制造破坏性同意，并暴露一个非原子的失败窗口。
 
-`/goal edit <objective>` 编辑当前未完成目标，但不改变其阶段或激活态。若目标已经完成，则创建一个新的活跃目标，因为领域不允许恢复已完成状态，而新的完成条件应拥有新的目标身份。单独使用 `edit` 会返回错误而不是启动编辑器，因为 ACP 共享的非结构化命令契约没有可移植的模态编辑器。
+`/goal edit <objective>` 编辑当前未完成目标，但不改变其阶段或激活态。若目标已经完成，则创建一个新的活跃目标，因为领域不允许恢复已完成状态，而新的完成条件应拥有新的目标身份。单独使用 `edit` 会返回错误而不是启动编辑器，因为可移植的非结构化命令契约没有模态编辑器。
 
 `/goal pause`、`/goal resume` 与 `/goal clear` 使用当前视图调用相应的比较并交换领域动词。恢复既适用于停止的持久阶段，也适用于会话恢复、fork 或驱动器替换后处于活跃但未激活状态的目标。领域规则仍会拒绝已耗尽的回合上限、对已活跃且已激活目标的重复恢复、非法阶段转换与陈旧身份。清除会移除当前指针，而会话日志保留带修订号的墓碑和此前快照。
 
@@ -40,16 +40,16 @@ Status: implemented
 
 `agent-spine-demo` 接受可选的 `goals` 组合对象，其中包含目标领域与模型工具的所有者配置。省略或设为 `false` 时不会挂载该栈。对无头单次调用方而言，明确选择加入非常重要：它们的结果 API 会在一个相关物理轮次后结束，不能静默变成长时间运行的逻辑目标操作。
 
-交互式应用包作出相反的产品选择。ACP 与 TUI 默认让 `goals` 使用所有者默认值，并挂载目标领域、模型工具、同会话驱动器、命令注册表与本生产方。两个应用都接受 `goals: false` 作为一致的整体退出选项。Python SDK 运行时闭包把本生产方与 ACP、命令及目标栈一并交付，使外部 `cordis.yml` 能组合相同命令。
+TUI 应用包作出相反的产品选择。它默认让 `goals` 使用所有者默认值，并挂载目标领域、模型工具、同会话驱动器、命令注册表与本生产方；`goals: false` 会一致地移除整个栈。[ACP（Agent Client Protocol）自动化应用](../simplification/2026-07-23-acp-automation-only-protocol.md)也默认挂载目标领域与模型工具，但有意省略命令服务。Python SDK 运行时闭包交付本生产方、命令与目标栈，使外部 `cordis.yml` 能组合相同命令。
 
 ## 测试
 
-生产方测试套件使用真实命令注册表、目标服务、agent 注册表与会话日志。它覆盖 Loader 安全导出、注册表发现、资源释放、空状态、目标描述解析、拒绝未完成目标替换、行内编辑、已完成目标替换、所有缺失状态控制、暂停/恢复/清除、每个持久阶段、阻塞代码/说明展示、已激活/未激活展示、经净化的领域错误、意外失败与持久变更记录。应用组合测试覆盖显式主干选择加入、TUI/ACP 默认值、一致退出、转发的领域/工具配置、命令发现、打包运行时闭包与扩展后的模型工具组装。一个无密钥快照会启动交付的 ACP 应用，观察其公布的 `/goal` 元数据，直接调用 `/goal`，并固定不经过模型轮次的结果；周边 ACP 快照还会固定该组合中的目标工具 schema。
+生产方测试套件使用真实命令注册表、目标服务、agent 注册表与会话日志。它覆盖 Loader 安全导出、注册表发现、资源释放、空状态、目标描述解析、拒绝未完成目标替换、行内编辑、已完成目标替换、所有缺失状态控制、暂停/恢复/清除、每个持久阶段、阻塞代码/说明展示、已激活/未激活展示、经净化的领域错误、意外失败与持久变更记录。应用组合测试覆盖显式主干选择加入、TUI 默认值、一致退出、转发的领域/工具配置、命令发现、打包运行时闭包与扩展后的模型工具组装。ACP 后端快照继续固定目标工具 schema，与这项面向人类的命令无关。
 
 ## 考虑过的替代方案
 
-- **让模型把 `/goal` 当作普通文本处理**——不予采纳，因为状态与直接生命周期操作会消耗模型轮次、可能被重新解释，也无法提供确定性的 ACP 发现。
-- **分别实现 TUI 和 ACP 处理器**——不予采纳，因为语法、错误行为与目标状态格式会发生偏差，可选部署也无法把该功能作为一个 effect 统一增删。
+- **让模型把 `/goal` 当作普通文本处理**——不予采纳，因为状态与直接生命周期操作会消耗模型轮次、可能被重新解释，也无法提供确定性的命令发现。
+- **在各 UI 中分别实现处理器**——不予采纳，因为语法、错误行为与目标状态格式会发生偏差，可选部署也无法把该功能作为一个 effect 统一增删。
 - **为 `ctx.commands` 添加模态编辑与替换确认**——不予采纳，因为现有跨表面契约是非结构化输入加直接输出；通用交互协议所需的设计远超这一个生产方。
 - **静默替换未完成目标**——不予采纳，因为这会在没有原子性或明确破坏性意图的情况下组合清除与创建。
 - **在人类状态中暴露目标 id 与修订号**——不予采纳，因为人类操作始终在一个同步处理器内针对准确当前视图；这些字段只会增加实现噪声，无法消除其他竞争。
@@ -57,7 +57,7 @@ Status: implemented
 
 ## 后果
 
-- TUI 与 ACP 暴露由可移除插件提供的同一个 Codex 形态 `/goal` 命令。
+- TUI 暴露由可移除插件提供的 Codex 形态 `/goal` 命令。
 - 人类状态会区分持久阶段与实时激活态，并报告准确的目标回合上限。
 - 直接暂停、恢复、清除、创建与编辑不消耗模型轮次，而其已接受变更仍可从会话日志重建。
 - 恢复后的会话等待人类决策；`/goal resume` 是字面命令路径，任何语言的普通提示词则可以授权模型工具路径。
@@ -67,6 +67,6 @@ Status: implemented
 
 - 可移植命令契约没有模态编辑器或确认交互；在出现通用跨表面交互原语之前，行内编辑与明确清除是有意选择。
 - `/goal` 不接受逐命令回合上限。部署配置拥有默认值；得到直接人类指示后，已授权模型工具可以编辑上限。
-- TUI 与 ACP 渲染可移植纯文本，而不是持续更新的目标状态组件。可重连命令输出和适配器专用状态指示器予以延期。
-- 无头 CLI 与 JSON-RPC 前端不消费命令注册表。
+- TUI 渲染可移植纯文本，而不是持续更新的目标状态组件。可重连命令输出和适配器专用状态指示器予以延期。
+- ACP 自动化服务器、无头 CLI 与 JSON-RPC 前端不消费命令注册表。
 - 该命令观察并改变状态，但不认证完成或阻塞。基于评估器的认证延期到具有明确权限与隔离契约的独立策略层。
diff --git a/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.i18n.yaml b/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.i18n.yaml
index e53c591aa5..15e75e05bd 100644
--- a/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-19-model-facing-goal-tools.md: 7cc3907d708115207e166455ea988120a03d768b
-2026-07-19-model-facing-goal-tools.zh.md: 1a381160354d6a2a24f957f41bc9e375c1ab01ca
+2026-07-19-model-facing-goal-tools.md: 6d8fb2a9a6cd48d9b0e1e3e6c3ccbbdfbe571e42
+2026-07-19-model-facing-goal-tools.zh.md: 377dd204357c8d830ec2096f375e4142f9a7d079
diff --git a/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.md b/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.md
index 7cc3907d70..6d8fb2a9a6 100644
--- a/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.md
+++ b/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.md
@@ -20,7 +20,7 @@ The surface also needs to preserve the separation between durable state and live
 
 The prompt tells the model that it may infer goal intent from a direct human request in any wording or language, but should not convert routine single-turn work into a goal. It must read the current goal before updating and copy the exact id and revision. On a restored or forked active-but-disarmed goal, a semantic human request to continue is grounds for `resume`. Completion is reserved for an achieved objective, and difficulty or uncertainty alone is not a blocker; a block report must name the concrete condition.
 
-All three tools use exclusive execution so a model-ordered batch observes prior mutations and their new revisions. Results are compact JSON. ACP presentation is a pure function of arguments and uses generic read or mutation cards; activation is reported only as live observation and is never written into replay state.
+All three tools use exclusive execution so a model-ordered batch observes prior mutations and their new revisions. Results are compact JSON. UI presentation is a pure function of arguments and uses generic read or mutation cards; activation is reported only as live observation and is never written into replay state.
 
 An autonomous goal round that successfully reports completion or blocking contributes the existing terminal `agent/turn-stop` decision for that physical turn, preventing an unnecessary follow-up request. Direct-human mutations do not contribute a terminal stop: the assistant can acknowledge the change, and concurrent human steering remains available to ordinary continuation folding.
 
diff --git a/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.zh.md b/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.zh.md
index 1a38116035..377dd20435 100644
--- a/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.zh.md
@@ -20,7 +20,7 @@ Status: implemented
 
 提示词告诉模型：它可以从任何措辞或语言的直接人类请求中推断目标意图，但不应把常规单轮工作转换为目标。更新前必须读取当前目标，并复制准确的 id 和修订号。对于恢复或派生后处于活跃但未激活状态的目标，人类在语义上要求继续即可成为执行 `resume` 的依据。只有目标已经实现时才能标记完成，困难或不确定性本身不构成阻塞；阻塞报告必须说明具体条件。
 
-三个工具都采用独占执行，使模型排序的批次可以观察此前变更及其新修订号。结果为紧凑 JSON。ACP 展示是参数的纯函数，使用通用读取或变更卡片；激活态仅作为实时观察返回，绝不会写入回放状态。
+三个工具都采用独占执行，使模型排序的批次可以观察此前变更及其新修订号。结果为紧凑 JSON。UI 展示是参数的纯函数，使用通用读取或变更卡片；激活态仅作为实时观察返回，绝不会写入回放状态。
 
 自主目标回合成功报告完成或阻塞后，插件会为该物理轮次贡献现有的终止型 `agent/turn-stop` 决策，避免再发起一次不必要的模型请求。直接人类发起的变更不会贡献终止决策：智能体可以确认该变更，并且并发的人类 steering（转向）仍可参与普通的继续执行折叠。
 
diff --git a/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.i18n.yaml b/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.i18n.yaml
index 9789d902fc..cc3aca9788 100644
--- a/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-19-plugin-command-registration.md: bc3d33f9abf7cd87b78aac8f7d36ac9c021a7910
-2026-07-19-plugin-command-registration.zh.md: 054ab3a90eeecc8c5ddc2ff072b53112fd8e7845
+2026-07-19-plugin-command-registration.md: 119b1e6e545dca8ea8cb425407723c8d11c806ad
+2026-07-19-plugin-command-registration.zh.md: fed14ca6e3bdb0cd40dabac7641a359f4bc3b3f2
diff --git a/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md b/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md
index bc3d33f9ab..119b1e6e54 100644
--- a/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md
+++ b/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md
@@ -6,17 +6,17 @@ English | [中文](2026-07-19-plugin-command-registration.zh.md)
 
 ## Problem
 
-The TUI owns seven slash commands, while ACP defines a standard command catalog and invocation shape. Keeping command names, help text, autocomplete, dispatch, and cancellation inside each adapter makes every new command an adapter edit, prevents optional plugins from contributing commands, and lets the two front doors drift. Treating slash input as an ordinary model prompt is also unsafe: a user-visible direct action can unexpectedly consume tokens or let the model reinterpret an unknown command.
+The TUI owns slash commands. Keeping command names, help text, autocomplete, dispatch, and cancellation inside the adapter makes every new command a TUI edit and prevents optional plugins from contributing commands. Treating slash input as an ordinary model prompt is also unsafe: a user-visible direct action can unexpectedly consume tokens or let the model reinterpret an unknown command.
 
-A shared mechanism must remain a UI concern rather than a model tool or agent-loop branch. It also needs exact per-agent visibility, HMR-safe removal, per-session ACP discovery, direct result rendering, and request-scoped cancellation without automatically adding command text or output to model history.
+A shared mechanism must remain a UI concern rather than a model tool or agent-loop branch. It also needs exact per-agent visibility, HMR-safe removal, direct result rendering, and request-scoped cancellation without automatically adding command text or output to model history.
 
 ## Decision
 
-`@deepseek-ai/dsh-commands` in `packages/ui/commands/` is the product command registry. The terminal and ACP app bundles mount it beside their consuming front door, and the SDK project helper emits the same service when scaffolding ACP directly; the executor-less, UI-less agent spine remains independent. TUI and ACP inject the service, while command producers depend only on the registry and any domain they operate.
+`@deepseek-ai/dsh-commands` in `packages/ui/commands/` is the product command registry. The TUI app bundle mounts it beside its consuming front door; the [automation-only ACP app](../simplification/2026-07-23-acp-automation-only-protocol.md) and the executor-less, UI-less agent spine omit it. TUI injects the service, while command producers depend only on the registry and any domain they operate.
 
 ### Registry contract
 
-A `CommandDefinition` contains a lowercase name without `/`, a non-empty description, an optional unstructured-input hint, and an abortable handler. Registration validates and detaches the metadata, freezes the effective definition, and returns the exact Cordis effect disposer. Duplicate names fail within one layer. Every adapter consuming the registry sees every effective definition; a command plugin that cannot operate in a deployment omits its registration there instead of encoding adapter identities in the shared domain.
+A `CommandDefinition` contains a lowercase name without `/`, a non-empty description, an optional unstructured-input hint, and an abortable handler. Registration validates and detaches the metadata, freezes the effective definition, and returns the exact Cordis effect disposer. Duplicate names fail within one layer. Every consumer sees every effective definition; a command plugin that cannot operate in a deployment omits its registration there instead of encoding consumer identities in the shared domain.
 
 `list(agent)` returns immutable name-sorted descriptors after scoped shadowing. `find(agent, name)` resolves the effective definition. `execute(agent, line, signal)` parses and runs a known definition, returning a detached `success` or `error` result; invalid syntax and unknown names return `undefined` so the adapter owns its direct error text.
 
@@ -36,46 +36,35 @@ Expected handler failures return `CommandResult.error`. Thrown or malformed resu
 
 ### TUI mapping
 
-The TUI registers `help`, `clear`, `cancel`, `reasoning`, `tools`, `redraw`, and `exit` as agent-scoped command definitions instead of switching on strings. Its autocomplete and help view read the live catalog, so plugin commands appear and disappear with their effects. Any submitted line beginning with `/` stays in the command plane; unknown input produces a terminal warning rather than falling through to `Agent.send()` or `Agent.steer()`.
+The TUI registers its built-in slash commands as agent-scoped command definitions instead of switching on strings. Its autocomplete and help view read the live catalog, so plugin commands appear and disappear with their effects. Any submitted line beginning with `/` stays in the command plane; unknown input produces a terminal warning rather than falling through to `Agent.send()` or `Agent.steer()`.
 
 Each submitted command owns an `AbortController`. TUI disposal aborts outstanding dispatches, removes the local definitions, and waits for the command-producing fiber before completing teardown.
 
-### ACP mapping
-
-The bridge follows the current [ACP v1 slash-command contract](https://agentclientprotocol.com/protocol/v1/slash-commands). `session/new` and `session/load` emit the exact agent's full `available_commands_update` snapshot; a new session's RPC response introduces its server-generated id before the snapshot is enqueued. Every registry change emits a replacement snapshot for each live session. Names, descriptions, and optional unstructured-input hints map directly to `AvailableCommand`.
-
-ACP permits a command prompt to contain additional supported content blocks. The bridge applies its ordinary lossless `text` and `resource_link` flattening, then enters the command plane when the result starts with `/`. Unsupported prompt blocks are rejected by the existing capability boundary. Known commands execute directly; unknown or malformed slash input returns a direct error and never reaches the model. Successful text, expected errors, and thrown-failure diagnostics stream as live `agent_message_chunk` output and settle `end_turn`.
-
-One model prompt or direct command may be in flight per ACP session, independently across sessions. `session/cancel` aborts the direct command when one owns the request; it calls `Agent.cancel()` only for an agent prompt, so cancelling a command cannot destroy unrelated queued or injected agent work. Connection teardown aborts commands and then disposes the owned agents.
-
 ## Testing
 
 The registry suite covers syntax boundaries, immutable normalization, runtime metadata validation, deterministic sorting, global and scoped shadowing, duplicate rejection, exact disposal, contained change-notification failures, direct invocation, expected and malformed results, synchronous and asynchronous failure, and every abort timing edge at per-file 100% statement, branch, function, and line coverage.
 
-TUI tests exercise all migrated built-ins, live plugin discovery, help/autocomplete refresh, direct results, unknown-command rejection, raw-input delivery, definition removal, startup rollback, and disposal cancellation. ACP tests use the real SDK connection, agent factory, loop, and JSONL persistence to verify create/load snapshots, dynamic updates, scoped multi-session catalogs, supported-block flattening, direct success/error/failure, unknown-command isolation, cancellation, and the absence of model requests or session messages. The SDK helper suite pins direct-ACP composition. Keyless ACP and terminal snapshots pin the new protocol and rendered transcript shapes.
+TUI tests exercise all migrated built-ins, live plugin discovery, help/autocomplete refresh, direct results, unknown-command rejection, raw-input delivery, definition removal, startup rollback, and disposal cancellation. Keyless terminal snapshots pin the rendered help, error, and command-result shapes.
 
 ## Alternatives considered
 
-- **Keep adapter-local switches** — rejected because optional plugins cannot contribute discovery and behavior without editing every front door.
+- **Keep adapter-local switches** — rejected because optional plugins cannot contribute discovery and behavior without editing the TUI.
 - **Represent human commands as model tools** — rejected because discovery and direct invocation are human UI behavior; routing through the model adds latency, token cost, and reinterpretation.
-- **Put the registry in the core agent spine** — rejected because headless and JSON-RPC agents do not consume it, while the two UI app bundles can compose it explicitly.
+- **Put the registry in the core agent spine** — rejected because UI-less front doors do not consume it, while TUI can compose it explicitly.
 - **Make `dsh-agent-loop` inject commands** — rejected because the loop does not execute or discover human commands. Agent-scoped producers declare the UI dependency in a child plugin instead.
 - **Attach adapter masks to each definition** — rejected because support is a composition fact, not command-domain state. Every composed adapter exposes a registered command; an incompatible plugin omits registration in that deployment.
 - **Send unknown slash input to the model** — rejected because typoed or unavailable direct actions must fail predictably rather than change execution planes.
 - **Persist generic command input and output** — rejected because adapter notices are not model-visible state. A handler that changes durable behavior calls the owning domain API, which records its own events.
-- **Restrict ACP commands to one text block** — rejected because ACP v1 permits accompanying content; the bridge already has a lossless accepted-block translation.
-
 ## Consequences
 
-- Command producers are ordinary removable plugins, and TUI/ACP share one validated catalog and dispatch contract.
+- Command producers are ordinary removable plugins, and TUI consumes their validated catalog and dispatch contract.
 - Agent-specific definitions retain existing flat scope and shadow semantics without a core-to-UI dependency.
 - Unknown slash input and command output are deterministic UI behavior with zero direct model tokens.
-- ACP clients receive current per-session snapshots after creation, load, registration, and HMR removal.
 - Direct command cancellation is isolated from model-turn cancellation.
 
 ## Known limitations and deferred work
 
-- Input metadata is ACP's current unstructured text hint. Typed forms, argument schemas, and completion providers remain command-owned or require a later protocol extension.
-- Generic command output is live-only and is not reconstructed after TUI restart or ACP reconnect.
+- Input metadata is limited to an unstructured text hint. Typed forms, argument schemas, and completion providers remain command-owned or require a later registry or consumer extension.
+- Generic command output is live-only and is not reconstructed after TUI restart.
 - Registry cancellation stops awaiting immediately, but external work stops only when a handler cooperates with its signal.
-- The headless CLI and JSON-RPC SDK front doors do not expose the command plane; only TUI and ACP consume it.
+- The ACP automation server, headless CLI, and JSON-RPC SDK front doors do not expose the command plane; only TUI consumes it.
diff --git a/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.zh.md b/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.zh.md
index 054ab3a90e..fed14ca6e3 100644
--- a/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.zh.md
@@ -6,17 +6,17 @@ Status: implemented
 
 ## 问题
 
-TUI 拥有七个斜杠命令，而 ACP 定义了标准命令目录与调用形态。如果命令名、帮助文本、自动补全、分派和取消都留在各适配器内部，每个新命令都需要修改适配器，可选插件无法贡献命令，两个前端也会逐渐偏离。把斜杠输入当作普通模型提示同样不安全：用户可见的直接操作可能意外消耗 token，或让模型重新解释未知命令。
+TUI 拥有斜杠命令。如果命令名、帮助文本、自动补全、分派和取消都留在适配器内部，每个新命令都需要修改 TUI，可选插件也无法贡献命令。把斜杠输入当作普通模型提示同样不安全：用户可见的直接操作可能意外消耗 token，或让模型重新解释未知命令。
 
-共享机制必须仍是 UI 关注点，而不是模型工具或智能体循环分支。它还需要精确的逐智能体可见性、可安全 HMR 移除、逐会话 ACP 发现、直接结果渲染和请求作用域取消，同时不会自动把命令文本或输出加入模型历史。
+共享机制必须仍是 UI 关注点，而不是模型工具或智能体循环分支。它还需要精确的逐智能体可见性、可安全 HMR 移除、直接结果渲染和请求作用域取消，同时不会自动把命令文本或输出加入模型历史。
 
 ## 决策
 
-位于 `packages/ui/commands/` 的 `@deepseek-ai/dsh-commands` 是产品命令注册表。终端与 ACP 应用 bundle（组合包）把它挂载在消费该服务的前端旁，SDK 项目 helper（辅助器）在直接搭建 ACP 时也会生成同一服务；无执行器、无 UI 的智能体 spine（主干）保持独立。TUI 与 ACP 注入该服务，命令生产者只依赖注册表及其操作的领域。
+位于 `packages/ui/commands/` 的 `@deepseek-ai/dsh-commands` 是产品命令注册表。TUI 应用 bundle（组合包）把它挂载在消费该服务的前端旁；[仅面向自动化的 ACP（Agent Client Protocol）应用](../simplification/2026-07-23-acp-automation-only-protocol.md)和无执行器、无 UI 的智能体 spine（主干）都省略该服务。TUI 注入该服务，命令生产者只依赖注册表及其操作的领域。
 
 ### 注册表契约
 
-`CommandDefinition` 包含不带 `/` 的小写名称、非空描述、可选的非结构化输入提示，以及可取消处理器。注册会校验并分离元数据、冻结有效定义，并返回准确的 Cordis effect disposer（副作用释放器）。同一层中的重复名称会失败。每个消费该注册表的适配器都能看到所有有效定义；若命令插件无法在某种部署中运行，它就不在该部署中注册，而不是把适配器身份编码进共享领域。
+`CommandDefinition` 包含不带 `/` 的小写名称、非空描述、可选的非结构化输入提示，以及可取消处理器。注册会校验并分离元数据、冻结有效定义，并返回准确的 Cordis effect disposer（副作用释放器）。同一层中的重复名称会失败。每个消费方都能看到所有有效定义；若命令插件无法在某种部署中运行，它就不在该部署中注册，而不是把消费方身份编码进共享领域。
 
 `list(agent)` 在作用域遮蔽后返回不可变、按名称排序的描述符。`find(agent, name)` 解析有效定义。`execute(agent, line, signal)` 解析并运行已知定义，返回分离后的 `success` 或 `error` 结果；无效语法和未知名称返回 `undefined`，由适配器拥有直接错误文本。
 
@@ -36,46 +36,35 @@ TUI 拥有七个斜杠命令，而 ACP 定义了标准命令目录与调用形
 
 ### TUI 映射
 
-TUI 把 `help`、`clear`、`cancel`、`reasoning`、`tools`、`redraw` 和 `exit` 注册为智能体作用域命令定义，不再对字符串执行 switch。自动补全与帮助视图读取实时目录，因此插件命令会随其副作用出现和消失。任何以 `/` 开头的提交行都留在命令平面；未知输入产生终端警告，不会落入 `Agent.send()` 或 `Agent.steer()`。
+TUI 把内置斜杠命令注册为智能体作用域命令定义，不再对字符串执行 switch。自动补全与帮助视图读取实时目录，因此插件命令会随其副作用出现和消失。任何以 `/` 开头的提交行都留在命令平面；未知输入产生终端警告，不会落入 `Agent.send()` 或 `Agent.steer()`。
 
 每个提交的命令拥有一个 `AbortController`。TUI 释放会中止未完成的分派、移除本地定义，并等待命令生产者 fiber（纤程）后再完成清理。
 
-### ACP 映射
-
-桥接遵循当前的 [ACP v1 斜杠命令契约](https://agentclientprotocol.com/protocol/v1/slash-commands)。`session/new` 与 `session/load` 发出准确智能体的完整 `available_commands_update` 快照；新会话的 RPC 响应会先引入服务端生成的 id，随后快照才会入队。每次注册表变更都会为每个实时会话发出替换快照。名称、描述和可选非结构化输入提示直接映射到 `AvailableCommand`。
-
-ACP 允许命令提示携带额外的受支持内容块。桥接应用普通的无损 `text` 与 `resource_link` 扁平化，然后在结果以 `/` 开头时进入命令平面。不支持的提示块由现有能力边界拒绝。已知命令直接执行；未知或格式错误的斜杠输入返回直接错误，绝不会到达模型。成功文本、预期错误和抛出失败的诊断作为实时 `agent_message_chunk` 输出流式发送，并以 `end_turn` 结束请求。
-
-每个 ACP 会话同时只能有一个模型提示或直接命令进行中，各会话彼此独立。当直接命令拥有请求时，`session/cancel` 会中止它；只有智能体提示才调用 `Agent.cancel()`，因此取消命令不会销毁无关的排队或注入智能体工作。连接清理会先中止命令，再释放所拥有的智能体。
-
 ## 测试
 
 注册表测试覆盖语法边界、不可变规范化、运行时元数据校验、确定性排序、全局与作用域遮蔽、重复拒绝、准确释放、变更通知失败隔离、直接调用、预期和格式错误结果、同步与异步失败，以及每种中止时序边沿；该源文件达到逐文件 100% 语句、分支、函数和行覆盖率。
 
-TUI 测试覆盖全部迁移后的内置命令、实时插件发现、帮助与自动补全刷新、直接结果、未知命令拒绝、原始输入交付、定义移除、启动回滚和释放取消。ACP 测试使用真实 SDK 连接、智能体工厂、循环与 JSONL 持久化，验证创建/加载快照、动态更新、作用域多会话目录、受支持块扁平化、直接成功/错误/失败、未知命令隔离、取消，以及不存在模型请求或会话消息。SDK helper 测试固定直接 ACP 组合。无密钥 ACP 与终端快照固定新的协议和渲染记录形态。
+TUI 测试覆盖全部迁移后的内置命令、实时插件发现、帮助与自动补全刷新、直接结果、未知命令拒绝、原始输入交付、定义移除、启动回滚和释放取消。无密钥终端快照固定渲染后的帮助、错误与命令结果形态。
 
 ## 考虑过的替代方案
 
-- **保留适配器本地 switch**——不予采纳，因为可选插件无法贡献发现与行为，除非修改每个前端。
+- **保留适配器本地 switch**——不予采纳，因为可选插件无法贡献发现与行为，除非修改 TUI。
 - **把人类命令表示为模型工具**——不予采纳，因为发现与直接调用属于人类 UI 行为；经由模型路由会增加延迟、token 成本和重新解释。
-- **把注册表放入核心智能体主干**——不予采纳，因为无头和 JSON-RPC 智能体不消费它，而两个 UI 应用组合包可以显式组合它。
+- **把注册表放入核心智能体主干**——不予采纳，因为无 UI 前端不消费它，而 TUI 可以显式组合它。
 - **让 `dsh-agent-loop` 注入 commands**——不予采纳，因为循环不执行也不发现人类命令。智能体作用域生产者改为在子插件中声明 UI 依赖。
 - **为每个定义附加适配器掩码**——不予采纳，因为支持能力是组合事实，而不是命令领域状态。每个已组合适配器都暴露已注册命令；不兼容插件不会在该部署中注册。
 - **把未知斜杠输入发送给模型**——不予采纳，因为输入错误或不可用的直接操作必须可预测地失败，而不能改变执行平面。
 - **持久化通用命令输入与输出**——不予采纳，因为适配器提示不是模型可见状态。改变持久行为的处理器会调用拥有该状态的领域 API，由后者记录自己的事件。
-- **把 ACP 命令限制为单个文本块**——不予采纳，因为 ACP v1 允许附带内容，而桥接已有无损的已接纳块转换。
-
 ## 后果
 
-- 命令生产者是普通的可移除插件，TUI 与 ACP 共享一个经过校验的目录和分派契约。
+- 命令生产者是普通的可移除插件，TUI 消费其经过校验的目录与分派契约。
 - 智能体特定定义保留现有扁平作用域与遮蔽语义，不引入核心到 UI 的依赖。
 - 未知斜杠输入与命令输出是确定性 UI 行为，直接模型 token 成本为零。
-- ACP 客户端在创建、加载、注册和 HMR 移除后收到当前的逐会话快照。
 - 直接命令取消与模型轮次取消彼此隔离。
 
 ## 已知限制与延期工作
 
-- 输入元数据仅为 ACP 当前的非结构化文本提示。类型化表单、参数模式和补全提供器仍由命令拥有，或需要后续协议扩展。
-- 通用命令输出仅实时存在，TUI 重启或 ACP 重新连接后不会重建。
+- 输入元数据仅限非结构化文本提示。类型化表单、参数模式和补全提供器仍由命令拥有，或需要后续注册表或消费方扩展。
+- 通用命令输出仅实时存在，TUI 重启后不会重建。
 - 注册表取消会立即停止等待，但外部工作只有在处理器配合信号时才会停止。
-- 无头 CLI 与 JSON-RPC SDK 前端不暴露命令平面；只有 TUI 和 ACP 消费它。
+- ACP 自动化服务器、无头 CLI 与 JSON-RPC SDK 前端不暴露命令平面；只有 TUI 消费它。
diff --git a/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.i18n.yaml b/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.i18n.yaml
index f28ec1e2b7..8f948d3d45 100644
--- a/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-19-same-session-goal-round-driver.md: 34d59456b5a8b54c92aba581da0ff22ea045b626
-2026-07-19-same-session-goal-round-driver.zh.md: dc2afd1ce18a45964bc1db04121211a9958445f3
+2026-07-19-same-session-goal-round-driver.md: d23af9a9b05d60d2dccad095455524844f1185b9
+2026-07-19-same-session-goal-round-driver.zh.md: f4f0cd6fd575d14427025bdbd8d10bc90e25f780
diff --git a/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.md b/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.md
index 34d59456b5..d23af9a9b0 100644
--- a/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.md
+++ b/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.md
@@ -70,7 +70,7 @@ An inbox acceptance can win the microtask race immediately before plugin unload
 
 The unit suite uses the real agent loop and session service with only the model scripted. It covers exact sequential admission and cap enforcement, load/resume inertness, every outcome classification, rate limiting, request errors, max tokens, downstream prompt veto, pre-admission and in-flight cancellation, unrelated-human cancellation, failed-pause fallback, human-input ordering, queued and downstream revision races, forged goal attribution, failed mutation and turn checkpoints including a later one-shot injection, scheduler and custom-agent failures, session-start reset, exact lifecycle retirement, and queued/running plugin teardown. The new driver source has per-file 100% statement, branch, function, and line coverage.
 
-A keyless ACP snapshot mounts the shipped editor app with the real goal domain, goal tools, goal driver, agent loop, persistence, and replay adapter through `cordis.yml`. One human turn creates and inspects a two-round goal, the first automatic turn stops normally, and ACP cancellation of a deliberately stalled second round records a durable pause. The normalized wire transcript and external JSONL assertions prove one session, round sources `1, 2`, the lifecycle mutation, and exact replay accounting without using `echo-agent` as an application surrogate.
+A keyless ACP snapshot mounts the shipped automation app with the real goal domain, goal tools, goal driver, agent loop, persistence, and replay adapter through `cordis.yml`. One human-originated turn creates and inspects a two-round goal, the first automatic turn stops normally, and ACP cancellation of a deliberately stalled second round records a durable pause. The normalized wire transcript and external JSONL assertions prove one session, round sources `1, 2`, the lifecycle mutation, and exact replay accounting without using `echo-agent` as an application surrogate.
 
 The core cancellation test proves notification order and containment: observers run only for effective cancellation, can queue replacement work before the inbox clear, cannot veto later observers by throwing, and an idle call emits nothing.
 
diff --git a/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.zh.md b/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.zh.md
index dc2afd1ce1..f4f0cd6fd5 100644
--- a/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.zh.md
@@ -70,7 +70,7 @@ Status: implemented
 
 单元测试使用真实 agent loop 与会话服务，只对模型编写脚本。覆盖内容包括精确连续接纳和上限执行、加载与恢复的惰性、所有结果分类、限流、请求错误、最大 token、下游提示词否决、接纳前与执行中取消、无关人类工作取消、暂停失败回退、人类输入排序、排队时与下游修订竞争、伪造目标来源、变更与轮次检查点失败（包括后续一次性注入）、调度器与自定义 agent 失败、会话启动重置、精确生命周期退出，以及排队中和运行中的插件卸载。新驱动器源码达到逐文件 100% 语句、分支、函数和行覆盖率。
 
-无密钥 ACP 快照通过 `cordis.yml` 挂载已发布的编辑器应用，以及真实目标领域、目标工具、目标驱动器、agent loop、持久化和回放适配器。一个人类轮次创建并检查一个两回合目标；第一个自动轮次正常停止，ACP 随后取消刻意停滞的第二个回合并记录持久暂停。规范化线协议和外部 JSONL 断言证明只有一个会话、回合来源依次为 `1, 2`、生命周期变更与回放计数精确，并且没有把 `echo-agent` 当作应用替身。
+无密钥 ACP 快照通过 `cordis.yml` 挂载已发布的自动化应用，以及真实目标领域、目标工具、目标驱动器、agent loop、持久化和回放适配器。一个源自人类的轮次创建并检查一个两回合目标；第一个自动轮次正常停止，ACP 随后取消刻意停滞的第二个回合并记录持久暂停。规范化线协议和外部 JSONL 断言证明只有一个会话、回合来源依次为 `1, 2`、生命周期变更与回放计数精确，并且没有把 `echo-agent` 当作应用替身。
 
 核心取消测试固定通知顺序与隔离：只有有效取消才会通知；观察者可以在清空收件箱前排入替代工作；抛错不能阻止后续观察者；空闲调用不会发出事件。
 
diff --git a/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.i18n.yaml b/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.i18n.yaml
index 0f1bead590..190a2b773f 100644
--- a/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-20-code-mode-typed-tool-returns.md: 29f139a7e965de3a374d195ecc205210e6ae7e93
-2026-07-20-code-mode-typed-tool-returns.zh.md: 431c0b1717c6783771255ce8291c241f8f92c30b
+2026-07-20-code-mode-typed-tool-returns.md: 1b5cbb9f4664c371a03cfefd079d5dc531711b51
+2026-07-20-code-mode-typed-tool-returns.zh.md: 70fd9ee72803c5cd2fa228a1d38ddf7ae47a4814
diff --git a/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.md b/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.md
index 29f139a7e9..1b5cbb9f46 100644
--- a/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.md
+++ b/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.md
@@ -75,7 +75,7 @@ Dynamic Cordis mounting follows the same rule: `cordis_mount` returns `{ id, plu
 
 Nested dispatch keeps the existing bounded `tool/code-dispatch.resultSummary` for diagnostics but does not persist canonical values. `tool/result` continues to persist only rendered content, error, and optional metadata. This is deliberately not a session-format change, so `SESSION_FORMAT_VERSION` remains unchanged and replay cannot recreate intermediate program values.
 
-The opaque `exec.parent` token marks nested calls. Presentation metadata and generic or tool-owned spill projections skip those calls because they have no direct result card and their canonical values never enter context. The outer `run_code` call alone produces one card and may spill its final post-policy presentation; `run_code` intentionally declares neither a result presenter nor presentation metadata, so ACP and TUI complete the card through their generic raw-content fallback using durable `tool/result.content`.
+The opaque `exec.parent` token marks nested calls. Presentation metadata and generic or tool-owned spill projections skip those calls because they have no direct result card and their canonical values never enter context. The outer `run_code` call alone produces one card and may spill its final post-policy presentation; `run_code` intentionally declares neither a result presenter nor presentation metadata, so UI adapters complete the card through their generic raw-content fallback using durable `tool/result.content`.
 
 ## Testing
 
@@ -95,7 +95,7 @@ Keyless real-worker integration tests pin the two handle workflows that prose re
 
 ## Consequences
 
-Code programs can compose tools through stable values instead of reverse-engineering Native prose. Native and Both Mode retain their existing text and editor presentation, while Code Mode receives output-schema types and exact runtime JSON. Tool authors must treat the canonical value as their programmatic API and put display-only formatting in the renderer.
+Code programs can compose tools through stable values instead of reverse-engineering Native prose. Native and Both Mode retain their existing text and UI presentation, while Code Mode receives output-schema types and exact runtime JSON. Tool authors must treat the canonical value as their programmatic API and put display-only formatting in the renderer.
 
 The worker performs bounded-depth flat-wire transport and lossless validation but does not make intermediate values cheap or durable. Outer overflow is an explicit failed run, and error handling remains intentionally human-guided rather than a versioned code union.
 
diff --git a/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.zh.md b/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.zh.md
index 431c0b1717..70fd9ee728 100644
--- a/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.zh.md
@@ -75,7 +75,7 @@ Code Mode 通过运行时请求中的 `{ name: "ToolCallError", memberNameProper
 
 嵌套分发会为诊断保留既有的有界 `tool/code-dispatch.resultSummary`，但不会持久化规范值。`tool/result` 继续只持久化渲染后的内容、错误和可选元数据。这并非会话格式变更，因此 `SESSION_FORMAT_VERSION` 保持不变，回放也无法重建程序的中间值。
 
-不透明的 `exec.parent` token 用于标识嵌套调用。由于这些调用没有直接对应的结果卡片，而且其规范值永远不会进入上下文，展示元数据以及通用或工具自有的输出落盘投影都会跳过它们。只有外层 `run_code` 调用会生成一张卡片，并且可能将 post-policy 处理后的最终展示写入落盘文件；`run_code` 有意既不声明结果展示器，也不声明展示元数据，因此 ACP 和 TUI 通过其通用的原始内容回退机制，使用持久化的 `tool/result.content` 补全该卡片。
+不透明的 `exec.parent` token 用于标识嵌套调用。由于这些调用没有直接对应的结果卡片，而且其规范值永远不会进入上下文，展示元数据以及通用或工具自有的输出落盘投影都会跳过它们。只有外层 `run_code` 调用会生成一张卡片，并且可能将 post-policy 处理后的最终展示写入落盘文件；`run_code` 有意既不声明结果展示器，也不声明展示元数据，因此 UI 适配器会通过通用的原始内容回退机制，使用持久化的 `tool/result.content` 补全该卡片。
 
 ## 测试
 
@@ -95,7 +95,7 @@ Code Mode 通过运行时请求中的 `{ name: "ToolCallError", memberNameProper
 
 ## 影响
 
-Code Mode 程序可以通过稳定值组合工具，无需逆向解析 Native 自然语言。Native 和 Both Mode 保留现有文本与编辑器展示，Code Mode 则获得输出 schema 类型和精确的运行时 JSON。工具作者必须把规范值视为程序化 API，并将仅用于展示的格式化放入渲染器。
+Code Mode 程序可以通过稳定值组合工具，无需逆向解析 Native 自然语言。Native 和 Both Mode 保留现有文本与 UI 展示，Code Mode 则获得输出 schema 类型和精确的运行时 JSON。工具作者必须把规范值视为程序化 API，并将仅用于展示的格式化放入渲染器。
 
 worker 会以嵌套深度有界的扁平协议格式传输数据并执行无损校验，但不会降低中间值的开销，也不会使其具备持久性。外层输出溢出会显式导致运行失败，错误处理则有意由人类引导，而不是依赖带版本的错误代码联合。
 
diff --git a/.agents/notes/implemented/feature/2026-07-21-cross-session-references.i18n.yaml b/.agents/notes/implemented/feature/2026-07-21-cross-session-references.i18n.yaml
index 9c0118a72d..b1f73ed15a 100644
--- a/.agents/notes/implemented/feature/2026-07-21-cross-session-references.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-21-cross-session-references.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-21-cross-session-references.md: bfa015b24cda6c8651829b6a7f0800326da5b502
-2026-07-21-cross-session-references.zh.md: e8e99124f7e2ccfe9fbe97323c17143372017562
+2026-07-21-cross-session-references.md: fc084b36e7920a72efff0f363278d24eaebc4c69
+2026-07-21-cross-session-references.zh.md: fe4a876b5265fa7ad298adf3b829bcec70e878e8
diff --git a/.agents/notes/implemented/feature/2026-07-21-cross-session-references.md b/.agents/notes/implemented/feature/2026-07-21-cross-session-references.md
index bfa015b24c..fc084b36e7 100644
--- a/.agents/notes/implemented/feature/2026-07-21-cross-session-references.md
+++ b/.agents/notes/implemented/feature/2026-07-21-cross-session-references.md
@@ -6,13 +6,13 @@ English | [中文](2026-07-21-cross-session-references.zh.md)
 
 ## Problem
 
-TUI and ACP users need to bring relevant work from another conversation into one new message without resuming, forking, or granting the source transcript authority over the current session. The harness already exposes exact session enumeration and raw event inspection, but every host independently parsing logs would duplicate compaction folding, provenance filtering, size limits, error behavior, and persistence. Encoding host markup directly into the agent message contract would also bind the core loop to one UI syntax.
+TUI users need to bring relevant work from another conversation into one new message without resuming, forking, or granting the source transcript authority over the current session. The harness already exposes exact session enumeration and raw event inspection, but every host independently parsing logs would duplicate compaction folding, provenance filtering, size limits, error behavior, and persistence. Encoding host markup directly into the agent message contract would also bind the core loop to one UI syntax.
 
 ## Decision
 
 `@deepseek-ai/dsh-session-reference` is one context consumer service at `ctx.sessionReferences`. Hosts normalize their protocol into `SessionReferenceInput[]`, call `prepare()` before enqueue, and pass the returned contexts through the generic `SendOptions.contexts` boundary. Core agent packages know only that one queued message may carry frozen `HookContext[]`; they do not parse session URIs or read another log.
 
-`dsh-session:<base64url(JSON.stringify(sessionId))>` is the canonical host-independent identifier. JSON string encoding precedes base64url so quotes, slashes, backslashes, Unicode, newlines, and every other JavaScript string value round-trip without delimiter ambiguity. TUI renders that URI inside `@[label](uri)` and ACP uses standard `resource_link`; text-only clients may use the same inline mention. Explicit Markdown mentions and resource links reject malformed URIs. Bare text becomes a reference only for a non-empty base64url-shaped payload, whose decode must still be canonical; empty or punctuation-only uses remain ordinary discussion text.
+`dsh-session:<base64url(JSON.stringify(sessionId))>` is the canonical host-independent identifier. JSON string encoding precedes base64url so quotes, slashes, backslashes, Unicode, newlines, and every other JavaScript string value round-trip without delimiter ambiguity. TUI renders that URI inside `@[label](uri)`; text-only clients may use the same inline mention. Explicit Markdown mentions reject malformed URIs. Bare text becomes a reference only for a non-empty base64url-shaped payload, whose decode must still be canonical; empty or punctuation-only uses remain ordinary discussion text.
 
 The service uses `ctx.sessionQuery.readSurface(sessionId)`, which loads one live-preferred corpus observation, folds it with the session package's canonical surface algorithm, and returns a detached header, capture seq, and current nodes. FTS is not a dependency: v1 discovery filters only id and cwd, and future title/body search can replace the candidate layer without changing reference identity or preparation.
 
@@ -28,13 +28,13 @@ One aggregated context is serialized as JSON beneath a fixed untrusted-backgroun
 
 `send()` and `steer()` snapshot content, resolved source, and contexts together as one deeply frozen lossless-JSON inbox record. Synthetic `inject()` accepts source and model-hidden metadata but not attached contexts, which belong to inbox messages. A claimed ordinary message exposes its attached contexts as the default `agent/prompt-submit` additional contexts; a block writes neither user message nor contexts. The waterfall's returned allow is authoritative, so a listener wrapping `next()` preserves downstream content and contexts unless it intentionally replaces them. After admission, absent or `separate` placement writes an independent `context/message`, while `prompt-prefix` placement bakes context and the effective request into one prompt event. Drained steering bypasses `agent/prompt-submit` but applies the same placement split. Late steering retains the same record when converted to queued input, while cancellation, disposal, and terminal discard drop message and contexts together. `agent/queued` reports the frozen contexts so the observation event describes the complete retained item.
 
-This preserves host driving semantics: TUI decides `send()` versus `steer()` from the agent state after preparation, so only its queued path dispatches UserPromptSubmit hooks; ACP continues to call `send()` once per `session/prompt`. Reference preparation is not a new steering protocol and does not create a turn by itself.
+This preserves host driving semantics: TUI decides `send()` versus `steer()` from the agent state after preparation, so only its queued path dispatches UserPromptSubmit hooks. Reference preparation is not a new steering protocol and does not create a turn by itself.
 
 ## Host adapters
 
 TUI combines session candidates with the existing `@` file provider. Each candidate displays the latest folded session title and falls back to the session id; lookup follows the editor's cancellation signal, and session id, cwd, and mention labels escape external terminal controls while the canonical URI retains the original id. TUI prepares only submissions containing structured mentions, disables duplicate submit while awaiting snapshots, restores failed input, renders the prompt envelope's display content as the user message, and renders its session-reference metadata as a compact source list instead of exposing the complete JSON in the terminal.
 
-ACP detects direct slash commands from ordinary prompt flattening before extracting `dsh-session:` resource links and canonical inline mentions, so URI-shaped command arguments remain opaque while ordinary resource-link rendering is preserved. Standard `session/list` exposes each loadable session's folded title and, when references are mounted, a canonical URI under `_meta["deepseek-harness/sessionReference"]`; a client can use `title ?? sessionId` as the resource-link name. A valid reference without the optional service returns a capability-unavailable RPC error, and preparation failure occurs before the in-flight turn slot and agent send. A preparation-specific abort owner makes `session/cancel` and bridge teardown stop pending reads. Picker UI remains an ACP client responsibility because ACP does not define a cross-session mention menu.
+The [automation-only ACP transport](../simplification/2026-07-23-acp-automation-only-protocol.md) deliberately does not mount session-query or session-reference services.
 
 ## Budget and retention
 
@@ -43,8 +43,8 @@ Each of at most three references is independently capped at 65,536 UTF-8 bytes b
 ## Alternatives considered
 
 - **Wait for SQLite FTS5** — rejected because snapshot correctness requires exact id reads and canonical surface folding, not content search. FTS improves discovery only.
-- **Put mention syntax in `Agent.send()`** — rejected because it would make the core protocol parse TUI/ACP presentation and prevent typed non-text hosts from sharing the semantic layer.
-- **Implement references inside TUI and ACP separately** — rejected because projection, security warning, retention, and persistence would drift across hosts.
+- **Put mention syntax in `Agent.send()`** — rejected because it would make the core protocol parse one host's presentation syntax and prevent typed non-text hosts from sharing the semantic layer.
+- **Implement references separately in each host** — rejected because projection, security warning, retention, and persistence would drift across hosts.
 - **Place a separate user-role context message beside the prompt** — rejected because two adjacent user messages weaken the prompt's deictic binding: in `@foo what does this session discuss?`, the model may resolve “this session” as the current conversation instead of the referenced snapshot.
 - **Bake the prefix host-side before `send()`** — rejected because `agent/prompt-submit` must inspect and rewrite only the direct prompt. The effective prompt and attached contexts meet only after admission in AgentLoop, which can apply an `allow.content` rewrite consistently to both combined model content and `envelope.displayContent`; earlier host assembly would expose snapshot bytes to the hook or let those two views diverge.
 - **Replay the raw source log or restore shadowed events** — rejected because compact defines the current model surface and may intentionally retire sensitive or expensive history.
@@ -53,8 +53,8 @@ Each of at most three references is independently capped at 65,536 UTF-8 bytes b
 
 ## Verification
 
-Unit and integration coverage pins URI round-trips and text-boundary punctuation, explicit malformed references, title-aware candidate ranking, terminal-control escaping, projection exclusions, non-recursive prompt-envelope projection, backend-independent compact checkpoints, tag-safe framing, deduplication, self-reference, count limits, all-or-nothing reads, prompt cancellation against a non-settling storage read, independent per-source byte retention, frozen message ownership, prompt blocking, send/steer placement, title isolation, missing capability, title-aware ACP session listing, ordinary ACP resource links, opaque ACP command arguments, and compact TUI/ACP replay. A keyless TUI snapshot runs the real agent loop: the source surface replaces old user/assistant history with a compact checkpoint, the target submits a mention, and the captured model request contains one user message ordered as snapshot, request delimiter, and current prompt, without either shadowed string.
+Unit and integration coverage pins URI round-trips and text-boundary punctuation, explicit malformed references, title-aware candidate ranking, terminal-control escaping, projection exclusions, non-recursive prompt-envelope projection, backend-independent compact checkpoints, tag-safe framing, deduplication, self-reference, count limits, all-or-nothing reads, prompt cancellation against a non-settling storage read, independent per-source byte retention, frozen message ownership, prompt blocking, send/steer placement, title isolation, missing capability, and compact TUI replay. A keyless TUI snapshot runs the real agent loop: the source surface replaces old user/assistant history with a compact checkpoint, the target submits a mention, and the captured model request contains one user message ordered as snapshot, request delimiter, and current prompt, without either shadowed string.
 
 ## Consequences
 
-The new plugin is the stable semantic boundary and adds no persistence schema, event type, FTS dependency, source subscription, or compact shadow access. Standard TUI/ACP demo bundles mount it explicitly and expose its count and per-source byte limits in their own config; custom hosts remain unchanged until they mount the service and adapt their input. Reference contexts increase target history size within configured bounds and can later be summarized by ordinary target compaction, after which the source session is irrelevant.
+The new plugin is the stable semantic boundary and adds no persistence schema, event type, FTS dependency, source subscription, or compact shadow access. The standard TUI demo bundle mounts it explicitly and exposes its count and per-source byte limits in its config; custom hosts remain unchanged until they mount the service and adapt their input. Reference contexts increase target history size within configured bounds and can later be summarized by ordinary target compaction, after which the source session is irrelevant.
diff --git a/.agents/notes/implemented/feature/2026-07-21-cross-session-references.zh.md b/.agents/notes/implemented/feature/2026-07-21-cross-session-references.zh.md
index e8e99124f7..fe4a876b52 100644
--- a/.agents/notes/implemented/feature/2026-07-21-cross-session-references.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-21-cross-session-references.zh.md
@@ -6,13 +6,13 @@ Status: implemented
 
 ## 问题
 
-TUI 与 ACP（Agent Client Protocol）用户需要把另一场对话中的相关工作带入一条新消息，但不恢复、不 fork，也不让源 transcript（文本记录）对当前会话拥有权威性。harness 已经提供准确的会话枚举与原始事件检查，但若每个宿主都独立解析日志，就会重复实现压缩（compaction）折叠、来源过滤、大小限制、错误行为和持久化。把宿主标记直接编码进 agent（智能体）消息契约，还会让核心循环绑定某一种 UI 语法。
+TUI 用户需要把另一场对话中的相关工作带入一条新消息，但不恢复、不 fork，也不让源 transcript（文本记录）对当前会话拥有权威性。harness 已经提供准确的会话枚举与原始事件检查，但若每个宿主都独立解析日志，就会重复实现压缩（compaction）折叠、来源过滤、大小限制、错误行为和持久化。把宿主标记直接编码进 agent（智能体）消息契约，还会让核心循环绑定某一种 UI 语法。
 
 ## 决策
 
 `@deepseek-ai/dsh-session-reference` 是注册在 `ctx.sessionReferences` 上的单一上下文消费服务。宿主先把各自的协议规范化为 `SessionReferenceInput[]`，在入队前调用 `prepare()`，再通过通用的 `SendOptions.contexts` 边界传递返回的上下文。核心 agent 包只知道一条排队消息可以携带已冻结的 `HookContext[]`；它们既不解析会话 URI，也不读取其他日志。
 
-`dsh-session:<base64url(JSON.stringify(sessionId))>` 是与宿主无关的规范标识符。系统先执行 JSON 字符串编码，再执行 base64url 编码，因此引号、正斜杠、反斜杠、Unicode、换行符以及其他任意 JavaScript 字符串值都能无损往返，不会因分隔符产生歧义。TUI 把该 URI 渲染到 `@[label](uri)` 中，ACP 使用标准 `resource_link`；纯文本客户端可以使用同一种行内提及标记。显式 Markdown 提及标记与资源链接会拒绝格式错误的 URI。裸文本只有在负载非空且形状符合 base64url 时才会成为引用，而且解码过程仍须通过规范性校验；空负载或只含标点符号的用法仍按普通讨论文本处理。
+`dsh-session:<base64url(JSON.stringify(sessionId))>` 是与宿主无关的规范标识符。系统先执行 JSON 字符串编码，再执行 base64url 编码，因此引号、正斜杠、反斜杠、Unicode、换行符以及其他任意 JavaScript 字符串值都能无损往返，不会因分隔符产生歧义。TUI 把该 URI 渲染到 `@[label](uri)` 中；纯文本客户端可以使用同一种行内提及标记。显式 Markdown 提及标记会拒绝格式错误的 URI。裸文本只有在负载非空且形状符合 base64url 时才会成为引用，而且解码过程仍须通过规范性校验；空负载或只含标点符号的用法仍按普通讨论文本处理。
 
 该服务使用 `ctx.sessionQuery.readSurface(sessionId)`：它优先从实时会话加载一次语料观察结果，使用会话包的规范表层算法执行折叠，并返回与源数据分离的会话头、捕获序号和当前节点。FTS 不是功能依赖：v1 的候选发现只按 id 和 cwd 过滤；未来的标题或正文搜索可以替换候选层，而无需改变引用标识或准备过程。
 
@@ -28,13 +28,13 @@ TUI 与 ACP（Agent Client Protocol）用户需要把另一场对话中的相关
 
 `send()` 与 `steer()` 会把内容、解析后的来源和上下文一起快照为一条深度冻结、无损 JSON 的收件箱记录。合成的 `inject()` 接受来源和模型不可见的元数据，但不接受附加上下文，因为上下文属于收件箱消息。普通消息被认领后，其附带的上下文会作为 `agent/prompt-submit` 的默认附加上下文公开；提示词被阻止时，系统既不写入用户消息，也不写入上下文。waterfall（瀑布式事件）返回的 allow 结果具有最终权威性，因此监听器包装 `next()` 时会保留下游内容与上下文，除非它有意替换这些值。消息被接纳后，未指定放置方式或指定为 `separate` 时会写入独立的 `context/message`；指定为 `prompt-prefix` 时则会把上下文与最终生效的请求合并写入同一个提示词事件。排空 steering 消息时会绕过 `agent/prompt-submit`，但采用相同的放置方式分流。延迟到达的 steering 转换为排队输入时保留同一条记录；取消、dispose（资源释放）和到达终止态后的丢弃则会同时丢弃消息与上下文。`agent/queued` 会报告已冻结的上下文，使观察事件能够描述完整的保留项。
 
-这保留了宿主的驱动语义：TUI 在准备完成后根据 agent 状态决定调用 `send()` 还是 `steer()`，因此只有它的排队路径才会分派 UserPromptSubmit 钩子；ACP 则继续调用 `send()`，每个 `session/prompt` 调用一次。引用准备过程不是新的 steering 协议，本身也不会创建轮次。
+这保留了宿主的驱动语义：TUI 在准备完成后根据 agent 状态决定调用 `send()` 还是 `steer()`，因此只有它的排队路径才会分派 UserPromptSubmit 钩子。引用准备过程不是新的 steering 协议，本身也不会创建轮次。
 
 ## 宿主适配器
 
 TUI 把会话候选与现有 `@` 文件提供方组合在一起。每个候选项显示最新折叠后的会话标题，没有标题时回退到 session id。候选查询遵循编辑器的取消信号；session id、cwd 和提及标签中的外部终端控制字符会被转义，但规范 URI 仍保留原始 id。TUI 只准备包含结构化提及标记的提交；等待快照时禁用重复提交；失败时恢复输入；它把提示词封套的显示内容渲染为用户消息，并把其中的会话引用元数据渲染为精简的来源列表，不在终端中暴露完整 JSON。
 
-ACP 先从普通提示词扁平化结果中检测直接斜杠命令，再提取 `dsh-session:` 资源链接和规范的行内提及标记，因此形如 URI 的命令参数保持不透明，同时保留普通资源链接的渲染方式。标准 `session/list` 会公开每个可加载会话折叠后的标题；挂载会话引用功能时，还会在 `_meta["deepseek-harness/sessionReference"]` 下公开规范 URI。客户端可以使用 `title ?? sessionId` 作为资源链接名称。若引用有效但可选服务未挂载，系统会返回「功能不可用」RPC 错误；准备失败会发生在占用进行中轮次槽位并调用 agent send 之前。引用准备过程单独拥有中止控制权，因此 `session/cancel` 和桥接释放都能停止待处理的读取。选择器 UI 仍由 ACP 客户端负责，因为 ACP 未定义跨会话提及菜单。
+[仅面向自动化的 ACP（Agent Client Protocol）传输层](../simplification/2026-07-23-acp-automation-only-protocol.md)有意不挂载会话查询或会话引用服务。
 
 ## 预算与保留策略
 
@@ -43,8 +43,8 @@ ACP 先从普通提示词扁平化结果中检测直接斜杠命令，再提取
 ## 考虑过的替代方案
 
 - **等待 SQLite FTS5**：不予采纳，因为快照正确性依赖按准确 id 读取和规范表层折叠，而不是内容搜索。FTS 只改进候选发现。
-- **把提及标记语法放入 `Agent.send()`**：不予采纳，因为这会迫使核心协议解析 TUI／ACP 的表现层，并阻止带类型的非文本宿主复用同一语义层。
-- **在 TUI 和 ACP 中分别实现引用**：不予采纳，因为投影、安全警告、保留策略和持久化会在不同宿主之间逐渐偏离。
+- **把提及标记语法放入 `Agent.send()`**：不予采纳，因为这会迫使核心协议解析某个宿主的展示语法，并阻止带类型的非文本宿主复用同一语义层。
+- **在每个宿主中分别实现引用**：不予采纳，因为投影、安全警告、保留策略和持久化会在不同宿主之间逐渐偏离。
 - **在提示词旁放置单独的用户角色上下文消息**：不予采纳，因为相邻的两条用户消息会削弱提示词的指示语绑定：在 `@foo what does this session discuss?` 中，模型可能把「this session」解析为当前对话，而不是被引用的快照。
 - **在调用 `send()` 前由宿主合并前缀**：不予采纳，因为 `agent/prompt-submit` 必须只检查和改写直接提示词。最终生效的提示词与附加上下文只有在 AgentLoop 接纳后才汇合；此时 AgentLoop 可以把 `allow.content` 改写一致应用于合并后的模型内容和 `envelope.displayContent`。若由宿主更早组装，就会向该钩子暴露快照字节，或使这两个视图发生偏离。
 - **回放原始源日志或恢复被遮蔽的事件**：不予采纳，因为压缩定义了当前模型表层，并且可能有意淘汰敏感或开销高昂的历史内容。
@@ -53,8 +53,8 @@ ACP 先从普通提示词扁平化结果中检测直接斜杠命令，再提取
 
 ## 验证
 
-单元与集成测试覆盖 URI 无损往返与文本边界标点、显式格式错误的引用、会考虑标题的候选排序、终端控制字符转义、投影排除规则、提示词封套的非递归投影、与后端无关的压缩检查点、标签安全封套、去重、自引用、数量限制、读取的全有或全无、存储读取不结束时取消提示词、逐源独立字节保留、冻结的消息所有权、提示词阻止、send／steer 放置方式、标题隔离、功能缺失、包含标题信息的 ACP 会话列表、普通 ACP 资源链接、不透明的 ACP 命令参数，以及精简的 TUI／ACP 回放。无密钥 TUI 快照会运行真实的 agent loop（智能体循环）：源表层用一个压缩检查点替换旧的用户／assistant 历史，目标会话提交一个提及标记，捕获到的模型请求只包含一条用户消息，其中依次为快照、请求分隔符和当前提示词，并且不包含任一被遮蔽的字符串。
+单元与集成测试覆盖 URI 无损往返与文本边界标点、显式格式错误的引用、会考虑标题的候选排序、终端控制字符转义、投影排除规则、提示词封套的非递归投影、与后端无关的压缩检查点、标签安全封套、去重、自引用、数量限制、读取的全有或全无、存储读取不结束时取消提示词、逐源独立字节保留、冻结的消息所有权、提示词阻止、send／steer 放置方式、标题隔离、功能缺失和精简的 TUI 回放。无密钥 TUI 快照会运行真实的 agent loop（智能体循环）：源表层用一个压缩检查点替换旧的用户／assistant 历史，目标会话提交一个提及标记，捕获到的模型请求只包含一条用户消息，其中依次为快照、请求分隔符和当前提示词，并且不包含任一被遮蔽的字符串。
 
 ## 后果
 
-新插件构成稳定的语义边界，不会新增持久化 schema、事件类型、FTS 依赖、源会话订阅或对压缩所遮蔽内容的访问。标准 TUI／ACP 演示组合包会显式挂载它，并在各自的配置中暴露引用数量和逐源字节上限；自定义宿主在挂载该服务并适配输入前保持不变。引用上下文会在配置的界限内增大目标历史，随后可由目标会话的普通压缩进行摘要；完成压缩后，源会话便不再相关。
+新插件构成稳定的语义边界，不会新增持久化 schema、事件类型、FTS 依赖、源会话订阅或对压缩所遮蔽内容的访问。标准 TUI 演示组合包会显式挂载它，并在自身配置中暴露引用数量和逐源字节上限；自定义宿主在挂载该服务并适配输入前保持不变。引用上下文会在配置的界限内增大目标历史，随后可由目标会话的普通压缩进行摘要；完成压缩后，源会话便不再相关。
diff --git a/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.i18n.yaml b/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.i18n.yaml
index 929a802080..2dee4d6261 100644
--- a/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-21-log-backed-session-titles.md: 183aa6909fecffdaf18c77c2a66fbc38c67c2d2c
-2026-07-21-log-backed-session-titles.zh.md: c6a0c2ce2ad4b2cddec2ada36f655fe55adb143b
+2026-07-21-log-backed-session-titles.md: 4cf238a278a4eec7b894a0fcfb0f2ac464325bb0
+2026-07-21-log-backed-session-titles.zh.md: 933cc14eb245581c128cb18055df726174f953ec
diff --git a/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md b/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md
index 183aa6909f..4cf238a278 100644
--- a/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md
+++ b/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md
@@ -40,7 +40,7 @@ Automatic provider failures are nonfatal warnings and retain the latest title. E
 
 A fork inherits seed title events unchanged, like the rest of its source log. The first-message provider does not automatically retitle a fork. The all-messages provider may append a child-owned revision after a later child prompt, using inherited and new eligible messages.
 
-`ctx.sessionQuery.readTitle()` folds one live-preferred or persisted log without loading titles during `listSessions()`. ACP maps the event to `session_info_update` during both live streaming and load replay, using the event timestamp for `updatedAt`. The TUI uses the latest title as its header subtitle and sets the terminal window title to `<session title> — <configured product title>` after terminal-safe rendering. The Web host folds the same log state into a validated mux control frame after each attached-session subscription baseline and immediately after forwarding a live raw title event. The browser retains only newer title event seqs even when the control frame precedes list or session-instance creation; sidebar labels, search, breadcrumbs, and the browser title then react to the projected revision. `session.list` remains metadata-only, so a cold persisted session uses the cwd basename or id until opening or resuming it attaches the log. The browser title uses `<session title> — <existing HTML title>` only for a selected titled session and otherwise preserves the product title. A synthetic title turn remains a completed durability boundary for the metadata write; consumers reporting agent completion use the core `findLastMessageTurnEnd()` fold so a later title, injection, or other plugin-owned turn cannot replace the preceding message-triggered outcome.
+`ctx.sessionQuery.readTitle()` folds one live-preferred or persisted log without loading titles during `listSessions()`. The TUI uses the latest title as its header subtitle and sets the terminal window title to `<session title> — <configured product title>` after terminal-safe rendering. The Web host folds the same log state into a validated mux control frame after each attached-session subscription baseline and immediately after forwarding a live raw title event. The browser retains only newer title event seqs even when the control frame precedes list or session-instance creation; sidebar labels, search, breadcrumbs, and the browser title then react to the projected revision. `session.list` remains metadata-only, so a cold persisted session uses the cwd basename or id until opening or resuming it attaches the log. The browser title uses `<session title> — <existing HTML title>` only for a selected titled session and otherwise preserves the product title. A synthetic title turn remains a completed durability boundary for the metadata write; consumers reporting agent completion use the core `findLastMessageTurnEnd()` fold so a later title, injection, or other plugin-owned turn cannot replace the preceding message-triggered outcome.
 
 ## Alternatives considered
 
@@ -54,7 +54,7 @@ A fork inherits seed title events unchanged, like the rest of its source log. Th
 
 ## Consequences
 
-- Titles survive JSONL and SQLite persistence, replay through ACP, and follow fork inheritance without a separate mutable record.
+- Titles survive JSONL and SQLite persistence, replay, and fork inheritance without a separate mutable record.
 - Web title delivery stays incremental and log-backed without a title index or persisted-list scan; cold list rows improve after attach.
 - A fallback appears immediately. Each fresh Web session adds one first-message auxiliary call; other compositions choose whether better titles justify model cost and whether later prompts should retitle a session.
 - Auxiliary request records and late accepted titles consume event seqs and may create balanced zero-step turns, so persistence exposes both attempted dispatches and accepted updates even though model history and KV-cache identity do not change.
diff --git a/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.zh.md b/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.zh.md
index c6a0c2ce2a..933cc14eb2 100644
--- a/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.zh.md
@@ -40,7 +40,7 @@ Status: implemented
 
 与源日志的其他部分相同，fork 会原样继承作为种子的标题事件。首消息提供方不会自动为 fork 重新生成标题。全部消息提供方可以在子会话出现后续提示词后追加一项归子会话所有的修订，并使用继承的合格消息和新增的合格消息。
 
-`ctx.sessionQuery.readTitle()` 会折叠一份实时优先或已持久化的日志，而不会在 `listSessions()` 期间加载标题。ACP（Agent Client Protocol）会在实时流式输出和加载回放期间把该事件映射到 `session_info_update`，并使用事件时间戳作为 `updatedAt`。TUI 使用最新标题作为其标题栏副标题，并在完成终端安全渲染后，将终端窗口标题设置为 `<session title> — <configured product title>`。Web host 会在每个已附加会话的订阅基线之后，以及转发实时原始标题事件后立即，将同一份日志状态折叠为经过校验的 mux 控制帧。即使控制帧先于列表或会话实例创建抵达，浏览器也只保留标题事件 seq 较新的版本；侧边栏标签、搜索、面包屑和浏览器标题会随投影后的修订更新。`session.list` 仍只包含元数据，因此尚未打开的持久化会话会继续以 cwd 基名或 id 作为回退，直至打开或恢复会话时附加其日志。浏览器仅在选中已有标题的会话时将标题设置为 `<session title> — <existing HTML title>`，否则保留产品标题。合成标题轮次本身仍会完成，并作为元数据写入的持久性边界；报告 agent 完成情况的消费方使用核心的 `findLastMessageTurnEnd()` 折叠逻辑，因此后续的标题轮次、注入轮次或其他归插件所有的轮次无法取代此前由消息触发的结果。
+`ctx.sessionQuery.readTitle()` 会折叠一份实时优先或已持久化的日志，而不会在 `listSessions()` 期间加载标题。TUI 使用最新标题作为其标题栏副标题，并在完成终端安全渲染后，将终端窗口标题设置为 `<session title> — <configured product title>`。Web host 会在每个已附加会话的订阅基线之后，以及转发实时原始标题事件后立即，将同一份日志状态折叠为经过校验的 mux 控制帧。即使控制帧先于列表或会话实例创建抵达，浏览器也只保留标题事件 seq 较新的版本；侧边栏标签、搜索、面包屑和浏览器标题会随投影后的修订更新。`session.list` 仍只包含元数据，因此尚未打开的持久化会话会继续以 cwd 基名或 id 作为回退，直至打开或恢复会话时附加其日志。浏览器仅在选中已有标题的会话时将标题设置为 `<session title> — <existing HTML title>`，否则保留产品标题。合成标题轮次本身仍会完成，并作为元数据写入的持久性边界；报告 agent 完成情况的消费方使用核心的 `findLastMessageTurnEnd()` 折叠逻辑，因此后续的标题轮次、注入轮次或其他归插件所有的轮次无法取代此前由消息触发的结果。
 
 ## 考虑过的替代方案
 
@@ -54,7 +54,7 @@ Status: implemented
 
 ## 后果
 
-- 标题可以在 JSONL 和 SQLite 持久化中存续，通过 ACP 回放，并遵循 fork 继承语义，而无需单独的可变记录。
+- 标题可以在 JSONL 和 SQLite 持久化中存续、重放并遵循 fork 继承语义，而无需单独的可变记录。
 - Web 标题仍以增量方式从日志交付，无需标题索引或扫描持久化列表；冷启动列表项会在会话附加后改用标题。
 - 回退标题会立即出现。每个新建的 Web 会话都会增加一次针对首消息的辅助调用；其他组合可以自行决定更优标题是否值得模型成本，以及后续提示词是否需要重新生成会话标题。
 - 辅助请求记录和延迟接受的标题会占用事件 seq，并可能创建平衡的零步骤轮次，因此持久化会同时呈现尝试发起的调用与已接受的更新，尽管模型历史和 KV 缓存标识保持不变。
diff --git a/.agents/notes/implemented/process/2026-07-03-documentation-graph-atlas.md b/.agents/notes/implemented/process/2026-07-03-documentation-graph-atlas.md
index 7969f0e80c..837a019056 100644
--- a/.agents/notes/implemented/process/2026-07-03-documentation-graph-atlas.md
+++ b/.agents/notes/implemented/process/2026-07-03-documentation-graph-atlas.md
@@ -26,7 +26,7 @@ Every graph page declares one maintenance mode:
 
 ### First shipped index
 
-The index links eleven relationship surfaces. Package topology and tool-package affordances live in the existing generated catalogs that already own those facts; the remaining focused diagrams are generated by `scripts/gen-doc-graphs.ts`.
+The index links ten relationship surfaces. Package topology and tool-package affordances live in the existing generated catalogs that already own those facts; the remaining focused diagrams are generated by `scripts/gen-doc-graphs.ts`.
 
 | Graph | Maintenance mode | Source of truth |
 |---|---|---|
@@ -40,7 +40,6 @@ The index links eleven relationship surfaces. Package topology and tool-package
 | [event producer/consumer matrix](../../../../docs/event-producer-consumer.md) | hybrid generated | Cordis event declarations, AST-scanned `ctx.on/emit/parallel/serial/waterfall` sites, and explicit dynamic dispatch overrides |
 | [agent turn and step lifecycle](../../../../docs/agent-lifecycle.md) | curated | architecture.md loop lifecycle, Cordis catalog links, and session event semantics |
 | [tool execution pipeline](../../../../docs/tool-execution-pipeline.md) | curated | tool pipeline semantics and the `tools/execute` waterfall |
-| [ACP snapshot replay](../../../../packages/ui/acp/snapshot-replay.md) | curated | snapshot harness behavior |
 
 ### Why generators own the docs
 
@@ -62,7 +61,7 @@ Committed diagrams use Mermaid because GitHub renders it in Markdown and it adds
 
 ## Consequences
 
-- Maintainers get visual entry points for topology, seams, event flow, lifecycle, app composition, and snapshot behavior.
+- Maintainers get visual entry points for topology, seams, event flow, lifecycle, and app composition.
 - SDK users get a path from use case to package composition instead of only bottom-up package references.
 - `doc-sync` now includes `verify-doc-graphs` and `verify-mermaid`, so graph drift and Mermaid syntax errors are caught with the other doc freshness gates.
 - Future fs and hooks work has a concrete place to land new complexity: fs should expand the capability docs and tool catalog, while hooks should expand the event matrix and tool execution pipeline.
diff --git a/.agents/notes/implemented/process/2026-07-04-doc-tiers-and-budgets.md b/.agents/notes/implemented/process/2026-07-04-doc-tiers-and-budgets.md
index 68e055f0a2..9fda4fd626 100644
--- a/.agents/notes/implemented/process/2026-07-04-doc-tiers-and-budgets.md
+++ b/.agents/notes/implemented/process/2026-07-04-doc-tiers-and-budgets.md
@@ -16,7 +16,7 @@ Standing docs accumulated repeated rules, retold incidents, duplicated package m
 ## Alternatives considered
 
 - **Skill and review discipline without a gate** — rejected: the accretion above happened while the current-state rule and reviewer attention already existed; a prose rule with no mechanical backstop demonstrably does not hold here, and this repo's own [quality-gates stance](2026-06-11-quality-gates.md) says invariants worth keeping are worth encoding.
-- **A broad gate over every doc tier** — rejected: a blanket ceiling punishes exactly the right kind of long doc (a feature matrix or type catalog where every row is a fact, e.g. `packages/ui/acp/acp-feature-support.md`) and generates per-file override churn that trains contributors to rubber-stamp raises.
+- **A broad gate over every doc tier** — rejected: a blanket ceiling punishes exactly the right kind of long doc (a feature matrix or type catalog where every row is a fact) and generates per-file override churn that trains contributors to rubber-stamp raises.
 - **Housing the standard inside the skill** — rejected: contracts live in docs and workflows in skills; a standard packed into SKILL.md is invisible to an agent that edits docs without invoking the skill, and `docs/AGENTS.md` already loads as subtree instructions for anyone working under `docs/`.
 
 ## Consequences
diff --git a/.agents/notes/implemented/simplification/2026-06-19-drop-mutable-session-summary.md b/.agents/notes/implemented/simplification/2026-06-19-drop-mutable-session-summary.md
index f1a9c9aa3c..a94ad9447b 100644
--- a/.agents/notes/implemented/simplification/2026-06-19-drop-mutable-session-summary.md
+++ b/.agents/notes/implemented/simplification/2026-06-19-drop-mutable-session-summary.md
@@ -10,8 +10,8 @@ The summary was designed for a future session picker (recency ordering via `upda
 
 - `SessionPersistence.update()` has **zero production callers** (every `.update(` hit is `createHash().update()` or a test).
 - `firstPrompt` is **never read** anywhere in production.
-- `title` *is* read in the ACP bridge — but from a tool-call **presenter** (`present.title`), never from stored session metadata.
-- `updatedAt` has **no consumer**: the only production caller of `list()` reads `meta.cwd` (a `SessionHeader` field) to validate a workspace on `session/load`; resume reads `createdAt`/`cwd`/`parentSession` — all header fields.
+- Session titles come from durable `session/title` events, while tool-card titles come from tool presenters; neither reads mutable session metadata.
+- Persistence-list consumers use immutable header identity, creation, lineage, and cwd fields. Recency and previews derive from the log rather than an `updatedAt` summary.
 - Decisively: the live `Session.header` was already typed `SessionHeader`, not `SessionMeta` — the summary never existed on the live session object; it lived only in the persistence layer, written and read by nothing but its own contract test.
 
 ## Decision
diff --git a/.agents/notes/implemented/simplification/2026-06-20-collapse-trace-only-session-events.md b/.agents/notes/implemented/simplification/2026-06-20-collapse-trace-only-session-events.md
index 4e8a092989..5df2bb065e 100644
--- a/.agents/notes/implemented/simplification/2026-06-20-collapse-trace-only-session-events.md
+++ b/.agents/notes/implemented/simplification/2026-06-20-collapse-trace-only-session-events.md
@@ -4,7 +4,7 @@ Status: implemented
 
 ## Problem
 
-The session event vocabulary includes first-class events that are not part of replayable conversation history and have little or no production consumption. `usage` is already present as a model stream chunk before the loop also appends a separate `usage` event. `error` duplicates the `turn/end { kind: 'error', message, code }` reason for loop failures; ACP settlement reads the turn-end reason, ACP rendering ignores the `error` event, and `deriveMessages()` skips it.
+The session event vocabulary includes first-class events that are not part of replayable conversation history and have little or no production consumption. `usage` is already present as a model stream chunk before the loop also appends a separate `usage` event. `error` duplicates the `turn/end { kind: 'error', message, code }` reason for loop failures; ACP settlement reads the turn-end reason, while message and UI projections skip the standalone `error` event.
 
 These events make the canonical transcript look more useful as telemetry than it currently is. They add event variants, invariants, tests, snapshots, and persistence cases, but they are not load-bearing as separate records. The facts they carry can still be useful: token usage should remain available for accounting, and an error's step number should not silently disappear. The simplification is to fold those facts into nearby events consumers already must understand, not to record less information.
 
diff --git a/.agents/notes/implemented/simplification/2026-06-20-prune-dead-seam-methods.md b/.agents/notes/implemented/simplification/2026-06-20-prune-dead-seam-methods.md
index f74de250ef..4d397649f5 100644
--- a/.agents/notes/implemented/simplification/2026-06-20-prune-dead-seam-methods.md
+++ b/.agents/notes/implemented/simplification/2026-06-20-prune-dead-seam-methods.md
@@ -10,7 +10,7 @@ A capability seam ([interface / implementation / consumer](../architecture/2026-
 
 ### `SessionPersistence.has()` and `.delete()`
 
-The abstract service declared its operations beyond create/append: `load`, `list`, `has`, `delete`. Production consumers of `ctx.sessionPersistence` use only two: the agent-loop resume path calls `load()` ([packages/core/agent-loop/src/index.ts:176](../../../../packages/core/agent-loop/src/index.ts)), and the ACP bridge calls `list()` for `session/list` ([packages/ui/acp/src/index.ts:494](../../../../packages/ui/acp/src/index.ts)). Grepping every `sessionPersistence.*` / `persistence.*` use across `packages/*/src` and `examples/` finds no `has(` and no `delete(` on the service. The `.has(`/`.delete(` calls in `packages/ui/acp/src/index.ts` are on the in-memory `SessionStore` and a local `Set` of loading ids, not persistence. The only callers of `has`/`delete` were the contract suites and per-backend specs.
+The abstract service declared its operations beyond create/append: `load`, `list`, `has`, `delete`. Production consumers use `load()` and `list()` for resume and session discovery, while no production caller uses persistence `has()` or `delete()`. The similarly named in-memory collection calls in protocol and UI code are unrelated. The only callers of persistence `has`/`delete` were the contract suites and per-backend specs.
 
 `has()` was not just unused: it added a tracked-vs-untracked coordinator probe and a contract branch even though `loadStored(id)` already owns durable existence checks. `delete()` dragged the `deleteStored` backend hook that every backend had to implement. This is the [drop-mutable-session-summary](2026-06-19-drop-mutable-session-summary.md) pattern: a contract test exercised both, but no shipping code asks "is this session persisted?" or removes one.
 
@@ -31,7 +31,7 @@ Re-adding a seam method with a live consumer is cheap and better-designed than t
 
 ## Verification
 
-`has`/`delete`/`deleteStored` are gone from the persistence seam, impl, and contract suites with no new dead exports; the remaining operations (`create`/`append`/`load`/`list`) are untouched, with ACP `session/list` and crash-recovery behaving identically; and the seam README and `docs/architecture.md` list only the surviving methods.
+`has`/`delete`/`deleteStored` are gone from the persistence seam, impl, and contract suites with no new dead exports; the remaining operations (`create`/`append`/`load`/`list`) are untouched, with persistence-backed session queries and crash recovery behaving identically; and the seam README and `docs/architecture.md` list only the surviving methods.
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/simplification/2026-06-20-public-agent-stop-surface.md b/.agents/notes/implemented/simplification/2026-06-20-public-agent-stop-surface.md
index 824efc804c..dba503ed25 100644
--- a/.agents/notes/implemented/simplification/2026-06-20-public-agent-stop-surface.md
+++ b/.agents/notes/implemented/simplification/2026-06-20-public-agent-stop-surface.md
@@ -16,7 +16,7 @@ The extra surface area made the loop carry a public verb that is mostly a teardo
 
 `cancel()` is the only public *stop* primitive on `Agent`. Lifecycle owners use `AgentHandle.dispose()` to stop and unregister an agent; non-owners use `cancel()` to abandon current and queued work. The implementation keeps a private turn cancellation holder, but it is not part of the plugin-facing `Agent` contract.
 
-`whenIdle()` is **retained** as the public quiescence-observation primitive (resolve once the agent settles out of `running`, resolve immediately when already idle, await the loop exit when disposed). It is not a stop verb; it is how a non-owner observes the stop *completing* without disposing the agent. Its live consumers are ACP and agent tests that await settlement through this public seam (`packages/ui/acp/tests`, `packages/core/agent-loop/tests`); the production ACP bridge owns its agents and tears them down through `AgentHandle.dispose()`, so `packages/ui/acp/src` itself has no `whenIdle()` call.
+`whenIdle()` is **retained** as the public quiescence-observation primitive (resolve once the agent settles out of `running`, resolve immediately when already idle, await the loop exit when disposed). It is not a stop verb; it is how a non-owner observes the stop *completing* without disposing the agent. Its live consumers are ACP and agent tests that await settlement through this public seam (`packages/acp/acp/tests`, `packages/core/agent-loop/tests`); the production ACP bridge owns its agents and tears them down through `AgentHandle.dispose()`, so `packages/acp/acp/src` itself has no `whenIdle()` call.
 
 Public `abort()` is absent, and the disposer remains async and waits for the loop to stop. Tests exercise cancellation through the public typed cause and explicit signal seams rather than reaching into the holder.
 
diff --git a/.agents/notes/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md b/.agents/notes/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md
index 910eb46e92..4dd2b8a650 100644
--- a/.agents/notes/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md
+++ b/.agents/notes/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md
@@ -13,7 +13,7 @@ Status: implemented
 
 ## Problem
 
-The loop records the canonical transcript in `SessionEvent` and also emitted a parallel set of live `agent/*` boundary mirror events: `agent/turn-start`, `agent/turn-end`, `agent/step-start`, and `agent/step-end`. The mirrors made consumers choose between two sources of truth for the SAME durable fact. ACP already chose the session log for the editor-facing transcript because it is the one durable, replayable record; consuming a live mirror would require reconciling its timing with the boundary already stored in that log. The stdio UI was the only production consumer that still rendered turn boundaries from the mirror events; it already rendered tool calls and results from `session/event`.
+The loop records the canonical transcript in `SessionEvent` and also emitted a parallel set of live `agent/*` boundary mirror events: `agent/turn-start`, `agent/turn-end`, `agent/step-start`, and `agent/step-end`. The mirrors made consumers choose between two sources of truth for the SAME durable fact. ACP already chose the session log for prompt settlement and committed output because it is the one durable, replayable record; consuming a live mirror would require reconciling its timing with the boundary already stored in that log. The stdio UI was the only production consumer that still rendered turn boundaries from the mirror events; it already rendered tool calls and results from `session/event`.
 
 This duplication is not free. Every lifecycle change had to update the session event, the mirror event, docs, invariants, tests, and snapshot expectations. The duplicate boundary events also made failure ordering subtle: a turn can be durably closed before a live `agent/turn-end` listener runs, so a post-boundary listener failure has no valid in-log position left and must be reported out of band.
 
diff --git a/.agents/notes/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md b/.agents/notes/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md
index c79202b95a..2972db0a1a 100644
--- a/.agents/notes/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md
+++ b/.agents/notes/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md
@@ -25,7 +25,7 @@ The premise the deferral hinged on is settled: chunk persistence is authoritativ
 
 Remove `agent/stream-chunk` from the agent event taxonomy. The token stream is read off `session/event` as `assistant/chunk`, the same feed persistence and replay already use — `session/event` is the single live transcript stream (assistant chunks, turn/step boundaries, tool activity, todos).
 
-**Consumers.** The only production consumer that mattered — the ACP bridge (`dsh-acp`), the real editor-facing streaming surface — already renders `assistant/chunk` off `session/event`, never `agent/stream-chunk`, so it is unaffected. The stdio UI (`dsh-ui-stdio`, a disposable test REPL) was the sole live consumer; it already had a `session/event` listener (from the boundary migration), so its chunk rendering folded into that listener as an `assistant/chunk` case. Consolidating to one listener also removed a latent hazard: the `inReasoning` dim-SGR flag was previously shared across two separate listeners (`agent/stream-chunk` and `session/event`), so a chunk and a boundary racing on it had no defined order; a single listener over the append order makes the interleaving deterministic.
+**Consumers.** Persistence, replay, and interactive renderers consume the authoritative session stream directly. The [automation-only ACP bridge](2026-07-23-acp-automation-only-protocol.md) emits committed `assistant/message` text rather than raw chunks, so it needs neither event. No production consumer requires an `Agent`-first token mirror.
 
 ## Scope
 
diff --git a/.agents/notes/implemented/simplification/2026-07-04-drop-image-content-block.md b/.agents/notes/implemented/simplification/2026-07-04-drop-image-content-block.md
index df63f2a78f..ebd6589814 100644
--- a/.agents/notes/implemented/simplification/2026-07-04-drop-image-content-block.md
+++ b/.agents/notes/implemented/simplification/2026-07-04-drop-image-content-block.md
@@ -4,17 +4,17 @@ Status: implemented
 
 ## Problem
 
-`ImageBlock` (`packages/llm/llm/src/types.ts`) had no production producer, and every consumer on every path DROPPED it: the deepseek adapter's serializer skipped image blocks (a documented MVP limitation), the pi-ai converter skipped them as unrepresentable, the ACP codec neither advertises image prompt capability nor forwarded image blocks outbound and REJECTS image prompt content inbound, and the compaction estimator charged a flat token constant and rendered `[image]`. An `ImageBlock` constructed then would silently vanish from the wire — the vocabulary advertised a capability no path honored, which is the silent-data-loss shape AGENTS.md's defensive patterns warn against. The only constructors anywhere were tests pinning the skip/drop/estimate branches.
+`ImageBlock` (`packages/llm/llm/src/types.ts`) had no production producer, and every consumer on every path DROPPED it: the DeepSeek adapter's serializer skipped image blocks (a documented MVP limitation), the pi-ai converter skipped them as unrepresentable, and the compaction estimator charged a flat token constant and rendered `[image]`. ACP independently rejected image prompt content. An `ImageBlock` constructed then would silently vanish from the provider wire — the vocabulary advertised a capability no path honored, which is the silent-data-loss shape AGENTS.md's defensive patterns warn against. The only constructors anywhere were tests pinning the skip/drop/estimate branches.
 
 ## Decision
 
-Remove `ImageBlock`, its map entry, and image-specific branches from adapters, ACP rendering, and compaction. Update the owning vocabulary docs and generated references in the same change. Unknown extension blocks still exercise default branches, and ACP continues to reject inbound image prompt content independently of the harness vocabulary.
+Remove `ImageBlock`, its map entry, and image-specific branches from adapters and compaction. Update the owning vocabulary docs and generated references in the same change. Unknown extension blocks still exercise default branches, and ACP continues to reject inbound image prompt content independently of the harness vocabulary.
 
 ## Alternatives considered
 
 ### Why not keep it?
 
-`ContentBlockMap` can reintroduce images when adapters, ACP, and compaction all support them. Keeping a core type whose only implementation is rejection would advertise an unusable surface; absence gives producers an immediate compile-time failure instead.
+`ContentBlockMap` can reintroduce images when adapters and compaction support them. ACP may remain a text-only automation protocol. Keeping a core type whose only implementation is rejection would advertise an unusable surface; absence gives producers an immediate compile-time failure instead.
 
 The recorded fallback, had review landed on keeping the slot: keep `ImageBlock` but replace every silent skip with a loud rejection, and document that policy in the vocabulary — the silent drop was the one state with no defender. Review landed on removal; the fallback stands as the documented alternative should the slot ever return ahead of a full feature.
 
@@ -24,4 +24,4 @@ No harness `ImageBlock` is constructed outside Agent Note records. ACP's indepen
 
 ## Consequences
 
-Re-adding a core vocabulary type later touches several packages at once — but that coordinated change is the shape a real multimodal feature needs anyway (adapter mapping, ACP advertisement, compaction pricing), and none of it existed to preserve.
+Re-adding a core vocabulary type later touches several packages at once — but that coordinated change is the shape a real multimodal feature needs anyway (adapter mapping and compaction pricing), and none of it existed to preserve.
diff --git a/.agents/notes/implemented/simplification/2026-07-04-fold-stdio-ui-helper.md b/.agents/notes/implemented/simplification/2026-07-04-fold-stdio-ui-helper.md
index b05dd22357..7122895e19 100644
--- a/.agents/notes/implemented/simplification/2026-07-04-fold-stdio-ui-helper.md
+++ b/.agents/notes/implemented/simplification/2026-07-04-fold-stdio-ui-helper.md
@@ -20,7 +20,7 @@ The earlier support helper package was removed: its manifest, tsconfig reference
 
 ### Why not promote it to `ui/` instead?
 
-Promotion would have resolved the support-vs-product mismatch while keeping the boundary — the right call only if the readline UI were an independently swappable integration or had a second composer, and the consumer census said neither. The structured ACP bridge stays its own package because it is the product protocol surface with its own contract and snapshot tiers; the readline helper is scaffolding for one app's front door. Re-extraction stays cheap pre-release: if a second product app wants the readline UI, split it back out then, with that consumer shaping the package contract.
+Promotion would have resolved the support-vs-product mismatch while keeping the boundary — the right call only if the readline UI were an independently swappable integration or had a second composer, and the consumer census said neither. The structured ACP bridge stays its own package because it is an automation protocol surface with its own contract and snapshot tiers; the readline helper is scaffolding for one app's front door. Re-extraction stays cheap pre-release: if a second product app wants the readline UI, split it back out then, with that consumer shaping the package contract.
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md b/.agents/notes/implemented/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md
index 7d1065d250..322420ab28 100644
--- a/.agents/notes/implemented/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md
+++ b/.agents/notes/implemented/simplification/2026-07-04-trim-acp-bridge-unreachable-surface.md
@@ -2,16 +2,18 @@
 
 Status: implemented
 
+> The handshake-identity simplification remains current. The generic-card fallback was removed when [ACP became automation-only](2026-07-23-acp-automation-only-protocol.md); UI transports retain the provider-neutral presentation contract.
+
 ## Problem
 
 Two pieces of `dsh-acp` surface were unreachable from any shipped configuration:
 
-1. **`AcpConfig.agentName` / `agentVersion`** (`packages/ui/acp/src/index.ts`). The shipped app package hands the bridge only `{ model }` (`packages/examples/acp-demo/src/index.ts`), so no leaf `cordis.yml` — the only production config surface — could set the knobs at all; they were settable solely by direct-mounting the bridge, which only a unit test did. Every snapshot expected output — the hook-matrix scenarios included — pins the schema defaults (`deepseek-harness-acp` / `0.0.1`). The pair also carried a live `TODO(double-default)`: the literals existed twice (schema `.default(...)` plus `??` fallbacks), with the TODO asking to pick one home.
+1. **`AcpConfig.agentName` / `agentVersion`** (`packages/acp/acp/src/index.ts`). The shipped app package hands the bridge only its agent target (`packages/examples/acp-demo/src/index.ts`), so no leaf `cordis.yml` — the only production config surface — could set the knobs at all; they were settable solely by direct-mounting the bridge, which only a unit test did. Every snapshot expected output — the hook-matrix scenarios included — pins the schema defaults (`deepseek-harness-acp` / `0.0.1`). The pair also carried a live `TODO(double-default)`: the literals existed twice (schema `.default(...)` plus `??` fallbacks), with the TODO asking to pick one home.
 2. **The `toolKindFor` name heuristic** (same file) special-cased `bash*`/`read*`/`write`/`edit*` tool names in the generic-fallback path. Since the [render-intent union](../architecture/2026-07-02-tool-render-intent-union.md), every first-party tool those arms matched ships its own `presentCall` carrying its kind, and the presenter-less production tools (`subagent`, `subagent_fork`) fell through to `other` anyway. The arms were production-reachable only when a tool declined to present its own call — a `presentCall` that THROWS (the containment fallback), or model arguments that fail the tool's schema so `defineTool`'s `presentCall` wrapper returns `undefined` (e.g. a `bash` call missing the required `description`) — and the bridge's own module doc states the design rule the heuristic violated: "the bridge never special-cases tool names".
 
 ## Decision
 
-Hardcode the existing handshake identity `{ name: 'deepseek-harness-acp', version: '0.0.1' }` at initialization and remove the unreachable config fields and duplicate defaults. Replace `toolKindFor` with neutral `'other'` at both presenter fallbacks. Normal first-party presentations are unchanged; malformed or failed presentations now render an honest generic card instead of inferring a kind from the tool name. Initialize tests and snapshots pin the handshake; only the malformed calls in `hook-codex-posttool-block` change fallback card kind.
+Hardcode the existing handshake identity `{ name: 'deepseek-harness-acp', version: '0.0.1' }` at initialization and remove the unreachable config fields and duplicate defaults. The original implementation also replaced `toolKindFor` with neutral `'other'` at both presenter fallbacks; ACP no longer projects tool cards, so that fallback has left the transport entirely. Initialize tests and snapshots pin the handshake.
 
 ## Alternatives considered
 
@@ -21,4 +23,4 @@ Branding can return when the app package exposes it to deployments. Inferring pr
 
 ## Consequences
 
-Nothing beyond the fallback rendering trade described above — degenerate paths whose neutral card is more diagnosable than an inferred first-party one.
+The bridge exposes no branding knobs. UI transports own generic presentation fallback without tool-name inference, while ACP carries no tool-card surface.
diff --git a/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.i18n.yaml b/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.i18n.yaml
index 232fec495b..7b529ad317 100644
--- a/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.i18n.yaml
+++ b/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-20-retire-readline-front-door.md: 7ebcfdc246bdf6971418609c61acbd4019aa90cb
-2026-07-20-retire-readline-front-door.zh.md: cf4d03594ed3a0cf31bed96eb2133bd37959084a
+2026-07-20-retire-readline-front-door.md: 166e9ca17989ff14f9c3f38cd9650387581b0f78
+2026-07-20-retire-readline-front-door.zh.md: 8c2568f60c3a12fb16a9ef4fe1775e875966a49a
diff --git a/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.md b/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.md
index 7ebcfdc246..166e9ca179 100644
--- a/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.md
+++ b/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.md
@@ -32,7 +32,7 @@ Pipes remain the default test medium. PTY-driven subprocess tests are sanctioned
 ## Accepted losses
 
 - **Piped multi-turn in one process** — the readline channel could script several turns over stdin; the one-shot bin runs one task per process. Multi-turn continuity is covered by `RESUME_SESSION_ID`/resume e2es and the TUI's scripted PTY conversation.
-- **Non-TTY `ask_user_question`** — the readline provider was the only non-TTY terminal implementation of `ctx.userInteraction`. A headless run whose model calls `ask_user_question` now fails that tool call (no provider); the ACP bridge remains the non-terminal provider. A future headless deployment that needs it composes its own provider.
+- **Non-TTY `ask_user_question`** — the readline provider was the only non-TTY terminal implementation of `ctx.userInteraction`. A headless or ACP automation run whose model calls `ask_user_question` fails that tool call unless its composition supplies a provider; Web owns the shipped non-terminal provider.
 
 ## Alternatives considered
 
diff --git a/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.zh.md b/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.zh.md
index cf4d03594e..8c2568f60c 100644
--- a/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.zh.md
+++ b/.agents/notes/implemented/simplification/2026-07-20-retire-readline-front-door.zh.md
@@ -32,7 +32,7 @@ Status: implemented
 ## 接受的损失
 
 - **单进程内的管道多轮对话**——readline 通道可以通过 stdin 脚本化多个轮次；单次任务 bin 每个进程只运行一个任务。多轮连续性由 `RESUME_SESSION_ID`/resume e2e 和 TUI 的脚本化 PTY 对话覆盖。
-- **非 TTY 的 `ask_user_question`**——readline 提供方是 `ctx.userInteraction` 唯一的非 TTY 终端实现。模型调用 `ask_user_question` 的 headless 运行现在会让该工具调用失败（没有提供方）；ACP 桥接仍是非终端提供方。未来需要它的 headless 部署自行组合提供方。
+- **非 TTY 的 `ask_user_question`**——readline 提供方是 `ctx.userInteraction` 唯一的非 TTY 终端实现。模型调用 `ask_user_question` 的 headless 或 ACP 自动化运行会让该工具调用失败，除非其组合提供相应的 provider；Web 拥有已交付的非终端 provider。
 
 ## 曾考虑的替代方案
 
diff --git a/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.i18n.yaml b/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.i18n.yaml
index c6b8ad0680..01bae69974 100644
--- a/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.i18n.yaml
+++ b/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-22-plan-specific-collaboration-state.md: 2fc163213ca0ee1de5633e4d7db14a814b2f7bb2
-2026-07-22-plan-specific-collaboration-state.zh.md: 811f657bf31c96dde88e400fc25fe2fe6df1f157
+2026-07-22-plan-specific-collaboration-state.md: 768fc45c1ec483662c2561269b164835bb235452
+2026-07-22-plan-specific-collaboration-state.zh.md: 174745c55fde5b0d30e72315ba472283c1b7654d
diff --git a/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.md b/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.md
index 2fc163213c..768fc45c1e 100644
--- a/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.md
+++ b/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.md
@@ -8,7 +8,7 @@ English | [中文](2026-07-22-plan-specific-collaboration-state.zh.md)
 
 The first plan-mode implementation introduced a generic named-mode registry even though the product shipped only `plan`. `ModeConfig.modes`, definition-name validation, `ctx.modes.list()`, retired-definition fallback, and a synthetic `review` mode in tests existed only to support hypothetical future collaboration modes. The production-specific behavior—plan guidance, `/plan`, and `exit_plan_mode`—still lived in the same package, so the generic API did not isolate a reusable mechanism from plan policy.
 
-The word “mode” also spans unrelated domains. Sandbox mode is an enforcing policy owned by `ctx.sandboxPolicy` and logged as `sandbox/mode`; plan mode is a collaboration stance that contributes guidance and a reviewed exit. Treating both as instances of one named-mode abstraction would obscure their independent ownership. ACP's protocol happens to expose a generic mode picker, but that is an adapter vocabulary rather than evidence that the harness needs a generic mode domain.
+The word “mode” also spans unrelated domains. Sandbox mode is an enforcing policy owned by `ctx.sandboxPolicy` and logged as `sandbox/mode`; plan mode is a collaboration stance that contributes guidance and a reviewed exit. Treating both as instances of one named-mode abstraction would obscure their independent ownership. A transport's generic vocabulary is not evidence that the harness needs a generic mode domain.
 
 ## Decision
 
@@ -16,7 +16,7 @@ Plan mode owns a plan-specific product package: `@deepseek-ai/dsh-plan-mode` at
 
 Configuration is exactly `{ section: string }`. The package registers the fixed `plan:policy` section, `/plan [message]`, the exact `/plan off` direct-exit form, and `exit_plan_mode` itself. Bare `/plan` selects active; another non-empty argument selects it first and then sends the trimmed text through `agent.steer()`, making the text an ordinary logged user message in the affected step. `/plan off` selects inactive without model input and can cancel an entry that is still pending at the boundary. The exit tool remains registered while plan mode is inactive so the request tool catalog stays stable.
 
-ACP keeps its protocol-level `default` and `plan` ids. The bridge maps those two ids to the boolean service, advertises only that fixed pair, rejects every other id at the adapter boundary, and maps committed `plan/mode` events back to `current_mode_update`. The protocol remains generic without forcing genericity into the product domain.
+Human-facing compositions own plan selection and review. The ACP automation composition mounts neither plan mode nor a mode-selection protocol, so its transport does not widen this product-specific vocabulary.
 
 Sandbox mode and approval policy remain separate enforcement axes. Plan mode neither reads nor writes them, and the simplification introduces no shared base type, registry, or preset abstraction across those concepts.
 
@@ -33,15 +33,14 @@ Sandbox mode and approval policy remain separate enforcement axes. Plan mode nei
 
 **Fold sandbox mode into the same service.** Rejected because collaboration guidance and execution confinement have different owners, lifecycle semantics, and consumers. Their shared English noun is not a domain relationship.
 
-**Let ACP own plan state.** Rejected because TUI, resume, fork, prompt assembly, and the exit tool need the same logged fact independently of ACP. ACP owns only the wire projection.
+**Let one presentation transport own plan state.** Rejected because TUI, Web, resume, fork, prompt assembly, and the exit tool need the same logged fact independently of any one transport. Presentation adapters own only their projections.
 
 ## Verification
 
 - Package tests retain boundary ordering, retry, append-failure, HMR disposal, prompt assembly, stable native and Code Mode schemas, review outcomes, and invariant coverage through the boolean service.
 - Command tests cover bare `/plan`, `/plan <message>`, active `/plan off`, pending-entry cancellation, inactive idempotence, absence of `/mode` and `/review`, and effect-scoped removal.
-- ACP tests cover fixed advertisement, both ids, unknown-id rejection, optimistic updates, committed exits, and load replay.
 - The keyless TUI scenarios enter through `/plan <message>`, leave through `/plan off`, and prove that each committed `plan/mode` precedes the request header it changes, the entry message is logged under plan guidance, and the post-exit request omits that guidance.
 
 ## Consequences
 
-The implementation has one vocabulary for one shipped feature. Adding another collaboration stance is now an explicit design decision instead of a config entry, while ACP clients continue to see their standard mode picker. The migration intentionally rejects old `mode/set` logs and old `modes.plan.section` configuration under the repository's pre-release format policy.
+The implementation has one vocabulary for one shipped feature. Adding another collaboration stance is an explicit design decision instead of a config entry, and automation clients do not acquire human mode controls through ACP. The migration intentionally rejects old `mode/set` logs and old `modes.plan.section` configuration under the repository's pre-release format policy.
diff --git a/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.zh.md b/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.zh.md
index 811f657bf3..174745c55f 100644
--- a/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.zh.md
+++ b/.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.zh.md
@@ -8,7 +8,7 @@ Status: implemented
 
 产品只交付了 `plan`，首个 plan mode 实现却引入了通用的具名模式注册表。`ModeConfig.modes`、定义名称校验、`ctx.modes.list()`、已退役定义的回退逻辑，以及测试中合成的 `review` 模式，都只为支持假想中的未来协作模式而存在。plan 引导、`/plan` 和 `exit_plan_mode` 这些生产专用行为仍位于同一个包（package）内，因此通用 API 并未将可复用机制与 plan 策略隔离开来。
 
-「mode」一词还横跨互不相关的领域。沙箱模式是由 `ctx.sandboxPolicy` 拥有、以 `sandbox/mode` 记录日志的强制执行策略；plan mode 则是一种协作方式，会贡献引导内容和经评审的退出路径。若把两者都视为同一个具名模式抽象的实例，就会掩盖二者各自独立的归属关系。ACP（Agent Client Protocol）协议恰好暴露了通用模式选择器，但这只是适配器词汇，并不能证明 harness 需要通用模式领域。
+「mode」一词还横跨互不相关的领域。沙箱模式是由 `ctx.sandboxPolicy` 拥有、以 `sandbox/mode` 记录日志的强制执行策略；plan mode 则是一种协作方式，会贡献引导内容和经评审的退出路径。若把两者都视为同一个具名模式抽象的实例，就会掩盖二者各自独立的归属关系。传输协议的通用词汇并不能证明 harness 需要通用模式领域。
 
 ## 决策
 
@@ -16,7 +16,7 @@ Plan mode 拥有一个 plan 专用产品包：位于 `packages/plan/plan-mode/`
 
 配置严格为 `{ section: string }`。该包自行注册固定的 `plan:policy` 段、`/plan [message]`、精确匹配的 `/plan off` 主动退出形式，以及 `exit_plan_mode`。不带参数的 `/plan` 选择激活；其他非空参数则先选择激活，再通过 `agent.steer()` 发送去除首尾空白后的文本，使该文本在受影响的步骤中成为一条记录到日志的普通用户消息。`/plan off` 选择未激活，不产生模型输入，并可取消仍待在边界生效的进入选择。即使 plan mode 未激活，退出工具仍保持注册，以确保请求工具目录稳定。
 
-ACP 保留协议层的 `default` 和 `plan` id。桥接层把这两个 id 映射到布尔服务，只公布这组固定选项，在适配器边界拒绝其他所有 id，并把已提交的 `plan/mode` 事件映射回 `current_mode_update`。协议仍保持通用性，但不会迫使产品领域也采用通用抽象。
+面向人类的组合拥有 plan 选择与评审。ACP 自动化组合既不挂载 plan mode，也不提供模式选择协议，因此其传输层不会扩大这套产品专用词汇。
 
 沙箱模式与审批策略仍是彼此独立的强制约束轴。Plan mode 既不读取也不写入二者；此次简化也没有为这些概念引入共享基类型、注册表或预设抽象。
 
@@ -33,15 +33,14 @@ ACP 保留协议层的 `default` 和 `plan` id。桥接层把这两个 id 映射
 
 **将沙箱模式折叠进同一服务。** 不予采纳，因为协作引导与执行约束有不同的归属方、生命周期语义和消费方。二者的英文名称都含「mode」，不代表存在领域关系。
 
-**让 ACP 拥有 plan 状态。** 不予采纳，因为 TUI、恢复、fork、提示词组装和退出工具都需要在 ACP 之外独立使用同一项已记录事实。ACP 只拥有协议投影。
+**让一种呈现传输拥有 plan 状态。** 不予采纳，因为 TUI、Web、恢复、fork、提示词组装和退出工具都需要独立于任何单一传输使用同一项已记录事实。呈现适配器只拥有各自的投影。
 
 ## 验证
 
 - 包测试通过布尔服务继续覆盖边界顺序、重试、追加失败、HMR（热模块替换）资源释放、提示词组装、稳定的原生 schema 与 Code Mode schema、评审结果和不变式。
 - 命令测试覆盖不带参数的 `/plan`、`/plan <message>`、激活状态下的 `/plan off`、取消待生效的进入选择、未激活状态下的幂等性、不存在 `/mode` 和 `/review`，以及随 effect 作用域移除。
-- ACP 测试覆盖固定模式列表公布、两个 id、未知 id 拒绝、乐观更新、已提交退出和加载回放。
 - 无密钥 TUI 场景通过 `/plan <message>` 进入、通过 `/plan off` 退出，并证明每个已提交的 `plan/mode` 都先于其所改变的请求头，进入消息在 plan 引导下记录到日志，且退出后的请求不含该引导。
 
 ## 后果
 
-该实现只用一套词汇描述一项已交付功能。若要添加另一种协作方式，必须显式作出设计决策，而不能只增加配置项；ACP 客户端仍可看到标准模式选择器。根据仓库的预发布格式策略，本次迁移有意拒绝旧的 `mode/set` 日志与 `modes.plan.section` 配置。
+该实现只用一套词汇描述一项已交付功能。若要添加另一种协作方式，必须显式作出设计决策，而不能只增加配置项；自动化客户端不会通过 ACP 获得面向人类的模式控制。根据仓库的预发布格式策略，本次迁移有意拒绝旧的 `mode/set` 日志与 `modes.plan.section` 配置。
diff --git a/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.i18n.yaml b/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.i18n.yaml
index 72e2341385..3e4286afec 100644
--- a/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.i18n.yaml
+++ b/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-22-tui-titles-from-session-title-service.md: b54b99647230255cf241415f94aa21b2630c44cd
-2026-07-22-tui-titles-from-session-title-service.zh.md: 67cc3332f0694887d5af0d71997d140b74669f46
+2026-07-22-tui-titles-from-session-title-service.md: 735c940dbb8a84104ab4320d5c535b41690953d5
+2026-07-22-tui-titles-from-session-title-service.zh.md: 8e7e3ef070cc6518476fe0f53355cb0705e74c6a
diff --git a/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.md b/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.md
index b54b996472..735c940dbb 100644
--- a/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.md
+++ b/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.md
@@ -6,7 +6,7 @@ English | [中文](2026-07-22-tui-titles-from-session-title-service.zh.md)
 
 ## Problem
 
-Two model-title implementations coexisted after the tui-staging line merged onto master. The TUI carried its own `autoTitle` feature: a fire-and-forget `ctx.llm.stream` call after the first user message that set the terminal window title via OSC 0, with a one-shot latch, its own prompt, its own 40-character cap, and its own resume re-derivation ([auto-title Agent Note](../feature/2026-07-21-tui-auto-pane-title.md), [default-on Agent Note](../feature/2026-07-21-tui-auto-title-default-on.md)). Master had meanwhile landed [log-backed session titles](../feature/2026-07-21-log-backed-session-titles.md): a `sessionTitle` capability whose accepted revisions are durable `session/title` events, with a deterministic fallback and optional model providers. The TUI already consumed `session/title` for its header subtitle and window title, so a session could be titled twice by different strategies, and the TUI's process-local title was invisible to every other consumer (ACP, resume listings, forks).
+Two model-title implementations coexisted after the tui-staging line merged onto master. The TUI carried its own `autoTitle` feature: a fire-and-forget `ctx.llm.stream` call after the first user message that set the terminal window title via OSC 0, with a one-shot latch, its own prompt, its own 40-character cap, and its own resume re-derivation ([auto-title Agent Note](../feature/2026-07-21-tui-auto-pane-title.md), [default-on Agent Note](../feature/2026-07-21-tui-auto-title-default-on.md)). Master had meanwhile landed [log-backed session titles](../feature/2026-07-21-log-backed-session-titles.md): a `sessionTitle` capability whose accepted revisions are durable `session/title` events, with a deterministic fallback and optional model providers. The TUI already consumed `session/title` for its header subtitle and window title, so a session could be titled twice by different strategies, and the TUI's process-local title was invisible to resume listings, forks, and Web consumers.
 
 ## Decision
 
diff --git a/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.zh.md b/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.zh.md
index 67cc3332f0..8e7e3ef070 100644
--- a/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.zh.md
+++ b/.agents/notes/implemented/simplification/2026-07-22-tui-titles-from-session-title-service.zh.md
@@ -6,7 +6,7 @@ Status: implemented
 
 ## 问题
 
-tui-staging 分支合入 master 后，两套模型标题实现并存。TUI 自带 `autoTitle` 特性：在首条用户消息后发起一次 fire-and-forget 的 `ctx.llm.stream` 调用，通过 OSC 0 设置终端窗口标题，带有一次性闩锁、自己的提示词、自己的 40 字符截断和自己的恢复重推导（[auto-title Agent Note](../feature/2026-07-21-tui-auto-pane-title.md)、[default-on Agent Note](../feature/2026-07-21-tui-auto-title-default-on.md)）。而 master 已落地[日志承载的会话标题](../feature/2026-07-21-log-backed-session-titles.md)：一个 `sessionTitle` 能力，其被接受的修订是持久的 `session/title` 事件，带确定性回退和可选的模型 provider。TUI 已经消费 `session/title` 作为横幅副标题和窗口标题，于是一个会话可能被两种策略各标题一次，且 TUI 的进程本地标题对其他所有消费者（ACP、恢复列表、fork）不可见。
+tui-staging 分支合入 master 后，两套模型标题实现并存。TUI 自带 `autoTitle` 特性：在首条用户消息后发起一次 fire-and-forget 的 `ctx.llm.stream` 调用，通过 OSC 0 设置终端窗口标题，带有一次性闩锁、自己的提示词、自己的 40 字符截断和自己的恢复重推导（[auto-title Agent Note](../feature/2026-07-21-tui-auto-pane-title.md)、[default-on Agent Note](../feature/2026-07-21-tui-auto-title-default-on.md)）。而 master 已落地[日志承载的会话标题](../feature/2026-07-21-log-backed-session-titles.md)：一个 `sessionTitle` 能力，其被接受的修订是持久的 `session/title` 事件，带确定性回退和可选的模型 provider。TUI 已经消费 `session/title` 作为横幅副标题和窗口标题，于是一个会话可能被两种策略各标题一次，且 TUI 的进程本地标题对恢复列表、fork 和 Web 消费方不可见。
 
 ## 决策
 
diff --git a/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.i18n.yaml b/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.i18n.yaml
new file mode 100644
index 0000000000..f1e78b0d82
--- /dev/null
+++ b/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.i18n.yaml
@@ -0,0 +1,6 @@
+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# side as of the last confirmed-consistent state. Both languages carry equal authority;
+# after editing either side, bring the other along and re-record with:
+#   pnpm run verify-translation-pairing --write
+2026-07-23-acp-automation-only-protocol.md: e9c98e8c5eb75396c895eb61a33a66d48f848436
+2026-07-23-acp-automation-only-protocol.zh.md: 30922fd60fa56e74c1d5c57c9b6e02c189d24bef
diff --git a/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.md b/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.md
new file mode 100644
index 0000000000..e9c98e8c5e
--- /dev/null
+++ b/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.md
@@ -0,0 +1,51 @@
+# Agent Note: ACP as an automation-only protocol
+
+Status: implemented
+
+English | [中文](2026-07-23-acp-automation-only-protocol.zh.md)
+
+## Problem
+
+The ACP bridge had become a second interactive product UI. It translated durable events into editor cards, terminal metadata, diffs, plans, titles, reasoning, commands, modes, model and permission pickers, session navigation, and human elicitation. Those responsibilities duplicated the TUI and the Web client while coupling an automation transport to UI services, persistence queries, presentation policy, and editor-specific conventions.
+
+ACP still has one useful role: another agent or automated controller can start a harness process, create an isolated session, send text, receive the committed answer, cancel work, and answer a permission request. The out-of-process ACP subagent backend depends on that standard protocol boundary.
+
+The snapshot suite complicates removal. Most ACP scenarios exercise the assembled agent backend rather than ACP presentation, so deleting the suite with the editor bridge would discard broad keyless behavioral coverage.
+
+## Decision
+
+`@deepseek-ai/dsh-acp` is an automation transport under [`packages/acp/acp`](../../../../packages/acp/acp/README.md), outside the `ui` package group. Its public protocol is intentionally small: version negotiation, fresh text sessions with one in-flight prompt each, committed assistant text updates, per-session cancellation, concurrent sessions, and connection-owned teardown. The bridge rejects additional directories, MCP servers, non-text prompts, empty prompts, unknown sessions, and overlapping prompts.
+
+The bridge emits only committed `assistant/message` text. Reasoning, raw chunks, tool activity, todos, plans, titles, retry markers, terminal metadata, diffs, locations, and resource links remain in the durable session log or in UI-specific transports. It does not provide session load/list/delete, commands, modes, configuration selectors, model switching, plan review, or human elicitation.
+
+One-shot `session/request_permission` remains. It is a machine policy channel for bridge-owned agents, not a human approval UI: the client chooses allow once, reject once, or cancel, and the bridge never turns that response into a durable grant. [`dsh-subagent-acp`](../../../../packages/subagent/subagent-acp/README.md) uses this channel programmatically.
+
+The app composition contains the agent spine, persistence, checkpoint policy, and ACP transport. It does not mount command, session-query, session-reference, plan-mode, permission-picker, or user-interaction services for ACP. SDK scaffolding likewise treats `ask_user_question` as TUI-only.
+
+Disconnect and plugin disposal share one memoized quiescence boundary. Both successful and failed transport closure settle pending prompts as cancelled, dispose every bridge-owned agent, and await loop and session cleanup. A create that loses the close race disposes its unpublished handle.
+
+## Snapshot boundary
+
+The ACP snapshot suite retains the backend-oriented scenarios and still boots the assembled ACP example. The refactor keeps 53 scenarios covering loop, tool, hook, compaction, subagent, filesystem, PTY, Code Mode, permission escalation, and persistence behavior. Names that described deleted presentation are backend-oriented (`bash-tool-turn` and `todo-write`).
+
+Seven scenarios are removed because their scripts exercised deleted ACP UI controls: configuration advertisement, mode advertisement, model selection, permission-preset selection, command status, and plan-mode review through the picker and elicitation flow. Their owning packages retain focused keyless coverage. The semantic-checkpoint scenario uses the headless `stream-json` example instead of ACP.
+
+A FIXME in [`examples/acp-agent/tests/acp.snapshot.ts`](../../../../examples/acp-agent/tests/acp.snapshot.ts) records the deliberate follow-up: move the remaining backend corpus to the headless `stream-json` suite, leaving ACP snapshots responsible only for the automation protocol. That migration is separate because rewriting the shared snapshot harness and every fixture would obscure this protocol simplification.
+
+## Alternatives considered
+
+**Keep ACP as an editor UI until Web reaches parity.** Rejected because it leaves two interactive contracts to evolve and keeps editor conventions in the automation boundary.
+
+**Replace ACP with a private subagent RPC.** Rejected because ACP already supplies a typed, interoperable process protocol and is used by the out-of-process subagent backend.
+
+**Remove machine permission requests with the other interaction features.** Rejected because an automated parent must answer a child agent's one-shot policy decision; this is control flow between agents, not presentation.
+
+**Delete the ACP snapshot suite or migrate every scenario in this change.** Rejected because most scenarios test the backend and remain valuable, while a full harness migration is an independent testing change. Only scenarios whose driver was a deleted UI method leave this suite.
+
+## Consequences
+
+ACP has a narrow contract suitable for agents and automation, while TUI and Web own human interaction and presentation. The package has fewer injected services, dependencies, protocol branches, and lifecycle states, and it no longer claims compatibility as a general editor front door.
+
+Automation clients receive complete committed text rather than token deltas or structured tool UI. They inspect durable logs or another API when they need reasoning, tool traces, titles, or richer state. Fresh-session-only operation also means callers that need durable browsing or resume use a host API rather than ACP.
+
+The backend snapshot coverage remains available during the transition, but its transport is temporarily incidental. The FIXME makes that debt explicit without expanding this PR into a repository-wide snapshot migration.
diff --git a/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.zh.md b/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.zh.md
new file mode 100644
index 0000000000..30922fd60f
--- /dev/null
+++ b/.agents/notes/implemented/simplification/2026-07-23-acp-automation-only-protocol.zh.md
@@ -0,0 +1,51 @@
+# Agent Note：ACP 作为仅面向自动化的协议
+
+Status: implemented
+
+[English](2026-07-23-acp-automation-only-protocol.md) | 中文
+
+## 问题
+
+ACP（Agent Client Protocol）桥接层已经变成第二套交互式产品 UI。它将持久事件转换为编辑器卡片、终端元数据、diff、计划、标题、推理、命令、模式、模型和权限选择器、会话导航以及面向人类的询问。这些职责与 TUI 和 Web 客户端重复，同时将自动化传输层与 UI 服务、持久化查询、展示策略和编辑器特定约定耦合在一起。
+
+ACP 仍有一个有用的职责：另一个 agent（智能体）或自动化控制器可以启动 harness 进程、创建隔离会话、发送文本、接收已提交的回答、取消工作并回答权限请求。跨进程 ACP subagent 后端依赖这个标准协议边界。
+
+快照套件使移除工作更复杂。大多数 ACP 场景测试的是组装后的 agent 后端，而不是 ACP 展示层；如果随编辑器桥接层一起删除整个套件，就会丢失大量无密钥行为覆盖。
+
+## 决策
+
+`@deepseek-ai/dsh-acp` 是位于 [`packages/acp/acp`](../../../../packages/acp/acp/README.md) 下、独立于 `ui` 包组的自动化传输层。其公开协议特意保持精简：版本协商、全新文本会话（每个会话最多允许一个进行中的提示词）、已提交的助手文本更新、按会话取消、并发会话，以及由连接负责的资源清理。桥接层会拒绝附加目录、MCP 服务器、非文本提示词、空提示词、未知会话和重叠提示词。
+
+桥接层只发出已提交的 `assistant/message` 文本。推理、原始分片、工具活动、待办事项、计划、标题、重试标记、终端元数据、diff、位置和资源链接仍保留在持久会话日志或 UI 专用传输层中。它不提供会话加载、列出与删除、命令、模式、配置选择器、模型切换、plan 评审或面向人类的询问。
+
+保留一次性 `session/request_permission`。它是为桥接层拥有的 agent 提供的机器策略通道，而不是面向人类的审批 UI：客户端可选择允许一次、拒绝一次或取消，桥接层绝不会将该响应转换为持久授权。[`dsh-subagent-acp`](../../../../packages/subagent/subagent-acp/README.md) 会以程序化方式使用该通道。
+
+应用组装包含 agent 主干、持久化、检查点策略和 ACP 传输层。它不会为 ACP 挂载命令、会话查询、会话引用、plan mode、权限选择器或用户交互服务。SDK 脚手架同样将 `ask_user_question` 视为 TUI 专属功能。
+
+断开连接与插件 dispose（资源释放）共享同一个经记忆化处理的静止边界。传输关闭无论成功还是失败，都会将待处理提示词以已取消状态结算，dispose 每个由桥接层拥有的 agent，并等待循环和会话清理完成。创建流程如果在与关闭的竞态中落败，就会 dispose 其尚未发布的 handle。
+
+## 快照边界
+
+ACP 快照套件保留面向后端的场景，并继续启动组装后的 ACP 示例。该重构保留 53 个场景，覆盖循环、工具、钩子、压缩（compaction）、subagent、文件系统、PTY、Code Mode、权限提升与持久化行为。原本描述已删除展示层的名称改为面向后端的名称（`bash-tool-turn` 和 `todo-write`）。
+
+删除七个场景，因为其脚本覆盖的是已删除的 ACP UI 控件：配置通告、模式通告、模型选择、权限预设选择、命令状态，以及通过选择器与询问流程实现的 plan mode 评审。它们所属的包仍保留专门的无密钥覆盖。语义检查点场景改用 headless `stream-json` 示例，不再使用 ACP。
+
+[`examples/acp-agent/tests/acp.snapshot.ts`](../../../../examples/acp-agent/tests/acp.snapshot.ts) 中的 FIXME 记录了明确的后续工作：将余下的后端测试集转移到 headless `stream-json` 套件，使 ACP 快照只负责自动化协议。该迁移独立实施，因为在本次变更中重写共享快照 harness 与每个 fixture（测试前置数据），会模糊本次协议精简的主线。
+
+## 考虑过的替代方案
+
+**在 Web 达到同等能力前，继续将 ACP 作为编辑器 UI。** 不予采用，因为这会留下两套需要演进的交互契约，并使编辑器约定继续存在于自动化边界中。
+
+**用私有 subagent RPC 替换 ACP。** 不予采用，因为 ACP 已经提供类型化、可互操作的进程协议，并由跨进程 subagent 后端使用。
+
+**随其他交互功能一起移除机器权限请求。** 不予采用，因为自动化父 agent 必须回答子 agent 的一次性策略决策；这是 agent 之间的控制流，而不是展示层。
+
+**删除 ACP 快照套件，或在本次变更中迁移每个场景。** 不予采用，因为大多数场景测试后端且仍有价值，而完整的 harness 迁移是一项独立的测试变更。只有驱动脚本依赖已删除 UI 方法的场景才离开该套件。
+
+## 结果
+
+ACP 具有适合 agent 与自动化的精简契约，而 TUI 和 Web 拥有面向人类的交互与展示。该包注入的服务、依赖、协议分支和生命周期状态更少，也不再将自身定位为通用编辑器入口。
+
+自动化客户端收到完整的已提交文本，而不是 token 增量或结构化工具 UI。当它们需要推理、工具跟踪信息、标题或更丰富的状态时，需要查看持久日志或其他 API。只支持全新会话也意味着，需要浏览持久会话或恢复会话的调用方必须使用 host API，而不是 ACP。
+
+过渡期间仍可使用后端快照覆盖，但其传输方式暂时只是附带选择。FIXME 明确记录了这项技术债，又不会将本 PR（Pull Request）扩展为全仓库快照迁移。
diff --git a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
index ebc48ba183..9ab3ee7a08 100644
--- a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
+++ b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
@@ -4,7 +4,7 @@ Status: implemented
 
 ## Problem
 
-Unit tests do not exercise the complete ACP subprocess transcript, while real-API tests are nondeterministic and key-gated. Editor-facing `session/update` output can therefore regress despite green unit coverage, as the [default-export postmortem](../../../../docs/postmortem/0001-acp-default-export-drops-inject.md) demonstrated.
+Unit tests do not exercise the complete assembled-agent subprocess or its ACP automation wire, while real-API tests are nondeterministic and key-gated. Loader wiring, backend behavior, and protocol output can therefore regress despite green unit coverage, as the [default-export postmortem](../../../../docs/postmortem/0001-acp-default-export-drops-inject.md) demonstrated.
 
 The blocker for a full-transcript test is the model: the agent's output is driven by a non-deterministic LLM, and a key-gated test that hits the real API on every run is neither deterministic nor CI-runnable. We want the fidelity of a real run with the determinism of a fixture.
 
@@ -50,10 +50,10 @@ Replay uses a `cordis.snapshot.yml` overlay that replaces the real adapter with
 
 A snapshot run asserts **two** normalized surfaces, because the harness's external surfaces are distinct:
 
-1. The **stdout transcript** — the framed `session/update` JSON-RPC the editor sees. Catches regressions in the ACP bridge's event→update translation (`streamSessionEventUpdate`). Compared against a committed `stdout.expected.jsonl`.
+1. The **stdout transcript** — the framed ACP JSON-RPC responses and committed-message updates an automation client receives. It catches regressions in the transport contract and is compared against a committed `stdout.expected.jsonl`.
 2. The **re-persisted session JSONL**, normalized and compared with `session.jsonl`. The same fixture is both replay source and expected log. Prompt text is scrubbed; one scenario per header class pins readable prompt and tool content as described in the [header-pinning Agent Note](2026-07-06-pin-request-header-content-in-one-scenario.md). Override scenarios derive model behavior solely from their sidecar.
 
-The surfaces are complementary: stdout covers bridge projection, while JSONL covers loop, tool, and boundary structure that the projection omits.
+The surfaces are complementary: stdout covers the minimal automation wire, while JSONL covers loop, tool, and boundary structure that the wire intentionally omits.
 
 Normalization replaces session, cwd, protocol-id, timestamp, path, and process volatility while preserving deterministic sequence numbers. Scenarios constrain real bash use to stable commands. The stdout expected output remains wire-shaped JSONL and every raw line must parse as JSON. Vitest updates only the stdout expected output; normalized session equality never overwrites the replay fixture.
 
@@ -77,6 +77,6 @@ Tool determinism comes from a generated cwd, scrubbed environment, fresh non-log
 
 ## Consequences
 
-The new tier adds reviewed per-scenario input, session, stdout, optional override, and optional workspace fixtures. Workspace seeds are copied into the generated cwd for both record and replay. In return the tier provides deterministic keyless transcript coverage through the real Loader and tool composition. The subprocess, input, workspace, normalization, and replay harness can support examples beyond ACP.
+The tier adds reviewed per-scenario input, session, stdout, optional override, and optional workspace fixtures. Workspace seeds are copied into the generated cwd for both record and replay. In return the tier provides deterministic keyless coverage through the real Loader and tool composition. Most retained scenarios exercise the assembled backend rather than ACP; the [automation-only ACP decision](../simplification/2026-07-23-acp-automation-only-protocol.md#snapshot-boundary) records the explicit follow-up to move that corpus to a transport-neutral headless suite.
 
-This Agent Note relates to but does not supersede the [proposed determinism Agent Note](../../proposed/testing/2026-06-11-deterministic-and-stress-testing.md): that proposal's "universal replay fixture" re-derives session *message history* after every test (an internal-consistency invariant), whereas snapshot tests pin the *external protocol output*. They are complementary — one guards the event-sourcing invariant, the other guards the editor-facing contract.
+This Agent Note relates to but does not supersede the [proposed determinism Agent Note](../../proposed/testing/2026-06-11-deterministic-and-stress-testing.md): that proposal's "universal replay fixture" re-derives session *message history* after every test (an internal-consistency invariant), whereas these snapshots pin assembled behavior plus the external automation output. They are complementary until the backend corpus moves off ACP.
diff --git a/.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md b/.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md
index 05da5152ff..c1afc4653c 100644
--- a/.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md
+++ b/.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md
@@ -4,7 +4,7 @@ Status: implemented
 
 ## Problem
 
-The harness leans hard on real-API tests by policy: [docs/testing.md](../../../../docs/testing.md) argues that a no-key suite proves the plumbing but not the product, and the [ACP inject postmortem](../../../../docs/postmortem/0001-acp-default-export-drops-inject.md) is the standing proof — 178 keyless tests stayed green while a real editor session crashed instantly. The real-API e2e suite (`pnpm run test:e2e`, the `*.e2e.ts` files) exists precisely to close that gap: it drives the agent against the live DeepSeek API — real model calls, real bash tools, multi-turn, resume, ACP-over-stdio.
+The harness leans hard on real-API tests by policy: [docs/testing.md](../../../../docs/testing.md) argues that a no-key suite proves the plumbing but not the product, and the [ACP inject postmortem](../../../../docs/postmortem/0001-acp-default-export-drops-inject.md) is the standing proof — 178 keyless tests stayed green while a real ACP client session crashed instantly. The real-API e2e suite (`pnpm run test:e2e`, the `*.e2e.ts` files) exists precisely to close that gap: it drives the agent against the live DeepSeek API — real model calls, real bash tools, multi-turn, resume, ACP-over-stdio.
 
 The default gate ([.github/workflows/ci.yml](../../../../.github/workflows/ci.yml)) is deliberately keyless: it carries no secret and runs for forks. `test:e2e` self-skips without a key (`describe.skipIf(!process.env.DEEPSEEK_API_KEY)`), so adding it there would report green without exercising the real suite. A separate secret-bearing workflow is required to make real-API coverage a merge signal.
 
diff --git a/.agents/notes/implemented/testing/2026-06-22-subagent-snapshot-replay.md b/.agents/notes/implemented/testing/2026-06-22-subagent-snapshot-replay.md
index d21a081f9b..ecba263f5d 100644
--- a/.agents/notes/implemented/testing/2026-06-22-subagent-snapshot-replay.md
+++ b/.agents/notes/implemented/testing/2026-06-22-subagent-snapshot-replay.md
@@ -4,7 +4,7 @@ Status: implemented
 
 ## Problem
 
-The snapshot tier (`pnpm run test:snapshot`) boots the real `acp-agent` subprocess, replays a recorded session through [`dsh-llm-replay`](../../../../packages/support/llm-replay), and diffs the normalized stdout transcript + re-persisted session log against committed expected outputs. It is the only tier that exercises the full editor-facing transcript end to end.
+The snapshot tier (`pnpm run test:snapshot`) boots the real `acp-agent` subprocess, replays a recorded session through [`dsh-llm-replay`](../../../../packages/support/llm-replay), and diffs the normalized automation wire + re-persisted session log against committed expected outputs. Most scenarios exercise assembled backend behavior through that real process boundary.
 
 It was built for ONE session per process, and that assumption is wired into two places:
 
diff --git a/.agents/notes/implemented/testing/2026-07-04-hook-snapshot-matrix.md b/.agents/notes/implemented/testing/2026-07-04-hook-snapshot-matrix.md
index 7c2c33460c..c7725b7f36 100644
--- a/.agents/notes/implemented/testing/2026-07-04-hook-snapshot-matrix.md
+++ b/.agents/notes/implemented/testing/2026-07-04-hook-snapshot-matrix.md
@@ -6,7 +6,7 @@ Status: implemented
 
 The hook bridges — [`dsh-hooks-claude`](../../../../packages/hooks/hooks-claude) (7 Claude Code hook points) and [`dsh-hooks-codex`](../../../../packages/hooks/hooks-codex) (5 Codex points) — map external hook commands onto the harness interception seams. They carry deep unit and coverage-spec coverage (every decision arm, every payload dialect, driven against a mocked seam) plus one key-gated e2e (`hooks.e2e.ts`, a live `PreToolUse` block). But the full-transcript snapshot tier — the one net that boots the real `acp-agent` subprocess, replays a recorded session keyless, and diffs the normalized ACP stdout + re-persisted log against committed expected outputs — covered exactly ONE hook: a Claude `UserPromptSubmit` block (`hook-cc-promptsubmit-block`).
 
-That is the tier a mocked unit test structurally cannot be: it exercises the REAL bridge translating a REAL hook process's outcome into the REAL seam decision, then the REAL loop's reaction, rendered exactly as an editor sees it. A bridge-translation or loop-structure regression that left every unit green would still escape it for every hook point but one — and for the Codex bridge, the ACP example did not even LOAD it, so no Codex hook could fire end-to-end at all.
+That is the tier a mocked unit test structurally cannot be: it exercises the REAL bridge translating a REAL hook process's outcome into the REAL seam decision, then the REAL loop's reaction through the automation wire and persisted log. A bridge-translation or loop-structure regression that left every unit green would still escape it for every hook point but one — and for the Codex bridge, the ACP example did not even LOAD it, so no Codex hook could fire end-to-end at all.
 
 ## Decision
 
diff --git a/.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md b/.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md
index e6c5d9eb1e..cbb5fc95d3 100644
--- a/.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md
+++ b/.agents/notes/proposed/feature/2026-06-30-pre-tool-input-rewrite.md
@@ -12,7 +12,7 @@ In the loop, a tool call's arguments are committed to the log and read by live c
 
 1. **`assistant/message`** is appended before tool dispatch — it is the model-history source `deriveMessages()` replays, so it carries the tool-call arguments the model itself emitted.
 2. **`tool/call`** is the durable AUDIT record, appended before `ctx.tools.execute()`.
-3. **Live presentation reads `tool/call.arguments`**: the ACP bridge remembers them and passes them to `presentResult`; `dsh-tool-bash` derives the card title, the rawInput, the cwd, and the terminal-vs-background treatment from them.
+3. **Human-facing presentation reads `tool/call.arguments`**: UI renderers pass them to `presentResult`; `dsh-tool-bash` derives the card title, the rawInput, the cwd, and the terminal-vs-background treatment from them.
 
 An execution-only rewrite would make the UI show one command while another ran and render the result against the wrong arguments. The registry prevents that failure mode today: it structured-clones and deep-freezes `arguments`, makes the execution identity properties non-writable, and exposes no test shim or listener path that can replace them. The rewrite design must preserve that protected-identity boundary rather than weaken it.
 
diff --git a/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.i18n.yaml b/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.i18n.yaml
index f64160a5a0..b2f1ade046 100644
--- a/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.i18n.yaml
+++ b/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-14-sdk-developer-projects.md: aa5cf64d7dd33dea229d74c2ae45a9244ee70e3c
-2026-07-14-sdk-developer-projects.zh.md: 8f7d1de5b16f38019c802f07eda701cee72deb4f
+2026-07-14-sdk-developer-projects.md: 65d2bf66232993222832eb0f2f4f56cfcf7afd16
+2026-07-14-sdk-developer-projects.zh.md: 8435a07d9b2545a8f41a1f96743c9c7e6d4daf3d
diff --git a/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.md b/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.md
index aa5cf64d7d..65d2bf6623 100644
--- a/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.md
+++ b/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.md
@@ -59,7 +59,7 @@ The table is the developer-visible support set for this phase. A `required` feat
 | `hooks` | optional | `claude` (default) / `codex`, multiple | Each feature option creates a separate editable configuration file |
 | `guard` | optional | `repeat-tool` | Provides repeated-tool-call reminders |
 | `timeout-policy` | optional | `default` | Applies a uniform policy to tools that declare timeout budgets |
-| `ask-user` | optional | `default` | Provides the `ask_user_question` tool; only `acp` and `tui` can select it because those two feature options provide the injected user-interaction service |
+| `ask-user` | optional | `default` | Provides the `ask_user_question` tool; only `tui` can select it because ACP is an automation transport and embed provides no human-interaction service |
 
 Both `bash` feature options apply to ACP, TUI, and embed and are not selected by the run interface. The sandbox feature option writes no active config key and therefore keeps `dsh-bash-sandbox`'s `read-only` default. Generated `cordis.yml` includes a commented example that developers can change explicitly to `workspace-write`:
 
@@ -107,7 +107,7 @@ Generated `package.json` provides the following scripts. `dev`, `build`, `start`
 `dsh-sdk start` and `dsh-sdk dev` accept a module target and forward arguments after `--` unchanged to the project entrypoint. Generic argument parsing uses Node `parseArgs()` with zero schema: valued flags use `--key=value`, bare flags become `true`, and `--no-*` becomes `false`.
 
 - TUI projects pass the selected model through `--model=<name>` and create or resume an agent according to optional `--resume=<session-id>`;
-- ACP uses protocol `session/load`
+- ACP clients create fresh sessions through protocol `session/new`;
 - Embed uses the model written into the generated code.
 
 Each feature-owned Cordis config entry keeps its developer-editable Cordis plugin config and explanatory comments in `cordis.yml`. When `dsh-sdk config` changes other features, it preserves unknown fields, formatting on untouched nodes, and comments. HMR is an ordinary leaf config entry: when the feature is selected, dev and start load the same watcher, and the command does not change the plugin tree implicitly.
diff --git a/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.zh.md b/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.zh.md
index 8f7d1de5b1..8435a07d9b 100644
--- a/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.zh.md
+++ b/.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.zh.md
@@ -59,7 +59,7 @@ create 还提供一次 `none / plugin / tool` 选择。`plugin` 固定生成 `pl
 | `hooks` | optional | `claude`（默认）/ `codex`，可多选 | 各功能选项生成独立的可编辑配置文件 |
 | `guard` | optional | `repeat-tool` | 提供重复工具调用提醒 |
 | `timeout-policy` | optional | `default` | 对声明超时预算的工具执行统一策略 |
-| `ask-user` | optional | `default` | 提供 `ask_user_question` 工具；注入的 user-interaction 服务由 acp/tui 两个功能选项提供，因此仅这两个接口可选 |
+| `ask-user` | optional | `default` | 提供 `ask_user_question` 工具；只有 `tui` 可选，因为 ACP 是自动化传输，而 embed 不提供人类交互服务 |
 
 `bash` 的两个功能选项都适用于 ACP、TUI 和 embed，不由运行接口决定。sandbox 功能选项不写任何生效的配置键，因而沿用 `dsh-bash-sandbox` 的 `read-only` 默认值；生成的 `cordis.yml` 保留注释示例，开发者可以显式改为 `workspace-write`：
 
@@ -107,7 +107,7 @@ my-agent/
 `dsh-sdk start` 与 `dsh-sdk dev` 可以接收模块 target，并把 `--` 后的参数原样转发给工程入口。通用参数解析使用 Node `parseArgs()` 的零 schema 模式：带值 flag 采用 `--key=value`，bare flag 转换为 `true`，`--no-*` 转换为 `false`。
 
 - TUI 工程通过 `--model=<name>` 传入所选 model，并根据可选的 `--resume=<session-id>` 创建或恢复 agent；
-- acp 使用协议 `session/load`
+- ACP 客户端通过协议 `session/new` 创建全新会话；
 - embed 使用生成代码中的 model。
 
 每个功能拥有的 Cordis 配置项在 `cordis.yml` 中保留自己的可编辑 Cordis 插件配置和说明注释；`dsh-sdk config` 修改其他功能时必须保留未知字段、未修改节点的格式和注释。HMR（热模块替换）是普通叶子配置项：选择该功能后，dev 和 start 加载同一个 watcher，命令不隐式改变插件树。
diff --git a/.agents/notes/proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md b/.agents/notes/proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md
index 1f52bfac25..0738997443 100644
--- a/.agents/notes/proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md
+++ b/.agents/notes/proposed/simplification/2026-07-04-prune-dead-core-spine-surface.md
@@ -15,7 +15,7 @@ The production corpus is `packages/*/*/src`, example sources/config, and runtime
 | `ReactLoopAgent` root export | Outside-package named imports are tests; production programs against `Agent` and creates/resumes through `ctx.agents`. | Return/interface-type `Agent` and make the concrete loop class package-internal; keep the deliberate synchronous config-only `AgentLoop.create()` path. |
 | `workflow-workerthread` protocol/runtime/session re-exports and named `WorkerWorkflowEngine` | Every package-name consumer uses the default engine; the workflow Agent Note already defines the worker wire protocol as private. | Keep the default plugin class/config contract; drop the duplicate named class export and keep protocol modules source-private. |
 | `code-runtime-worker` protocol/bootstrap re-exports | Outside-package production/e2e consumers use `WorkerCodeRuntime` and config, not `BootstrapPort`, `PatchableStream`, or worker message/boot types. | Keep the runtime class/config contract and make its wire/bootstrap vocabulary source-private. |
-| ACP translation/presenter root exports | `agentOptions`, `streamSessionEventUpdate`, `todosToPlan`, `ToolPresenter`, `nullToolPresenter`, and `TerminalRendering` have only same-file or ACP-test consumers; the sole outside-package production consumer mounts the plugin namespace. | Keep `name`, `inject`, `Config`, `AcpConfig`, and `apply`; make translation/presentation helpers source-private and test them in-package. |
+| ACP `agentOptions` root export | The helper has only same-file and ACP-test consumers; the sole outside-package production consumer mounts the plugin namespace. | Keep `name`, `inject`, `Config`, `AcpConfig`, and `apply`; make `agentOptions` source-private and test it through bridge behavior. |
 | `providerWording` and `completedTurnPrefix` root exports | Each has one same-package production caller; only the balanced-prefix helper has a same-package white-box test. | Make them source-private and test provider behavior. |
 | `depthOf`, `SubagentDepthError`, `SENSITIVE_ENV_PATTERN`, `waitForExit`, and `exitsWithin` root exports | Production subagent backends consume the in-process runner and subprocess construction/disposal helpers, not these enforcement/test internals. | Keep depth/environment/exit behavior but make the helpers and error/regex source-private; test through spawn and disposal. |
 | `PersistenceCoordinator.inits`, backend `inits` accessors, `seedCoversPrefix`, and `assertSerializable` | The accessors exist for white-box tests; `seedCoversPrefix` has no outside production importer; `assertSerializable` has no production caller and duplicates the coordinator append boundary's lossless snapshot. | Observe initialization through `session/flush`, make `seedCoversPrefix` source-private, and delete `assertSerializable`. Keep both backends, `SessionHeader`, and SQLite's version contract. |
diff --git a/.agents/notes/proposed/feature/2026-07-13-stream-workflow-progress-through-tool-calls.md b/.agents/notes/rejected/feature/2026-07-13-stream-workflow-progress-through-tool-calls.md
similarity index 98%
rename from .agents/notes/proposed/feature/2026-07-13-stream-workflow-progress-through-tool-calls.md
rename to .agents/notes/rejected/feature/2026-07-13-stream-workflow-progress-through-tool-calls.md
index 0c6516080a..b964ff64d8 100644
--- a/.agents/notes/proposed/feature/2026-07-13-stream-workflow-progress-through-tool-calls.md
+++ b/.agents/notes/rejected/feature/2026-07-13-stream-workflow-progress-through-tool-calls.md
@@ -1,6 +1,6 @@
 # Agent Note: Stream workflow progress through tool calls
 
-Status: proposed
+Status: rejected — ACP is automation-only; live workflow presentation needs a human-interface owner and a fresh design.
 
 ## Problem
 
diff --git a/.agents/notes/rejected/simplification/2026-06-20-drop-acp-session-load.md b/.agents/notes/rejected/simplification/2026-06-20-drop-acp-session-load.md
index b8b9b29987..96fa52e3ce 100644
--- a/.agents/notes/rejected/simplification/2026-06-20-drop-acp-session-load.md
+++ b/.agents/notes/rejected/simplification/2026-06-20-drop-acp-session-load.md
@@ -18,7 +18,7 @@ For now, ACP starts fresh sessions only. `initialize` advertises `loadSession: f
 - `initialize` does not advertise load support.
 - The `session/load` handler, loading-id tracking, cwd preflight for loaded sessions, and load replay tests are removed.
 - Snapshot fixtures no longer rely on load replay presentation.
-- [ACP docs](../../../../packages/ui/acp/README.md) describe fresh-session support only.
+- [ACP docs](../../../../packages/acp/acp/README.md) describe fresh-session support only.
 
 ## What we give up
 
diff --git a/.agents/skills/dsh-find-simplifications/SKILL.md b/.agents/skills/dsh-find-simplifications/SKILL.md
index 2e1ccdc3c8..43e2218085 100644
--- a/.agents/skills/dsh-find-simplifications/SKILL.md
+++ b/.agents/skills/dsh-find-simplifications/SKILL.md
@@ -34,7 +34,7 @@ Thin candidates are usually not enough for an Agent Note: deleting one typo, run
 Use parallel subagents when the user asks for breadth or many candidates. Give each agent a domain and require evidence, not guesses. Useful domains:
 
 - Agent loop and session log: turn/step boundaries, steering, abort/cancel, durable events, replay, load/resume.
-- ACP and UI surfaces: `session/*` methods, terminal `_meta`, transcript rendering, single vs multi-session state.
+- ACP automation and human UI surfaces: prompt settlement and teardown on the protocol side; transcript rendering and interaction state on the UI side.
 - LLM/tools/system prompt: stream/generate surfaces, assemblers, registries, tool schema defaults, presentation hooks.
 - Bash and tool execution: foreground/background split, task ownership, output spill files, executor methods.
 - Packages/examples/scripts/tests: package boundaries, static inventories, redundant snapshot expected outputs, support packages.
diff --git a/AGENTS.md b/AGENTS.md
index 8007f32b90..64259784fb 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -30,7 +30,8 @@ packages/    @deepseek-ai/dsh-<pkg> workspaces at packages/<group>/<pkg>/
   cordis/      self-referential toolset: the agent inspects/mounts plugins in its own runtime
   hooks/       Claude Code / Codex hook bridges + shared wire-protocol library
   session-persistence/  persistence seam + JSONL/SQLite backends
-  ui/          ACP/TUI/JSON-RPC bridges; boot, approval, interaction plugins
+  acp/         automation-only Agent Client Protocol server
+  ui/          TUI/JSON-RPC bridges; boot, approval, interaction plugins
   examples/    demo bundles (agent-spine + TUI/CLI/ACP/JSON-RPC bins) leaves load
   support/     dev/test infrastructure packages
   util/        zero-dependency utilities
@@ -64,7 +65,7 @@ pnpm run website:build  # VitePress build (doubles as the site's dead-link check
 pnpm run demo:headless "task" # one-shot agent (needs DEEPSEEK_API_KEY)
 pnpm run demo:tui       # full-screen TUI coding agent (needs DEEPSEEK_API_KEY)
 pnpm run demo:cordis    # self-referential demo: the agent modifies its own runtime (needs key)
-pnpm run demo:acp       # ACP server agent (needs DEEPSEEK_API_KEY)
+pnpm run demo:acp       # ACP automation server (needs DEEPSEEK_API_KEY)
 ```
 
 ### Host sandbox failures
@@ -107,7 +108,7 @@ Real-API tests and demos read `DEEPSEEK_API_KEY`, optional `DEEPSEEK_BASE_URL`,
 - **Tests describe behavior, not correctness.** Change obsolete behavior with its tests; explain why in the PR.
 - **Every non-trivial change MUST include at least one Agent Note in the same PR.** Update the owning note or add one, validate its premises against code, and exempt only mechanical/local edits ([scope](.agents/notes/README.md#when-to-write-one)).
 - **Testing policy** — [docs/testing.md](docs/testing.md). Every non-trivial model- or product-user-visible behavior change adds or updates a keyless snapshot through a real runnable example in the same PR; package tests, e2e-only assertions, and mock-only fixtures do not substitute for the assembled application transcript. Fixtures must replay on macOS/Linux; fix fixtures, not normalizers.
-- **A tool's ACP render intent is part of its design**, decided up front (`generic`/`terminal`/`diff`, `locations`); presentation methods are pure functions of `args` ([cookbook](docs/cookbook/adding-a-tool.md)).
+- **A tool's UI render intent is part of its design**, decided up front (`generic`/`terminal`/`diff`, `locations`); presentation methods are pure functions of `args` ([cookbook](docs/cookbook/adding-a-tool.md)).
 - **Plan unit, e2e, and snapshot coverage** for new seams, lifecycle shapes, and transcript surfaces; missing snapshot-harness support is part of the implementation, not deferred follow-up.
 - **Keep PRs coherent and merge with merge commits.** Split an independently meaningful feature or design decision into a separate or stacked PR when combining it obscures ownership, intent, or verification. Never squash/rebase or rewrite pushed branches; put a review fix on its introducing PR, then merge down the stack ([guide](docs/cookbook/responding-to-pr-review-on-a-stack.md)).
 - TODO markers: `FIXME`/`TODO`/`XXX` by urgency ([semantics](docs/development.md)).
diff --git a/docs/architecture.i18n.yaml b/docs/architecture.i18n.yaml
index 20553e1b90..3ef65b4ac9 100644
--- a/docs/architecture.i18n.yaml
+++ b/docs/architecture.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-architecture.md: d1051eecf51d8d1c7f8c235b0c5dd80478b43316
-architecture.zh.md: 502c0248a9d2c62af165ce07eb19489b76c5f6ee
+architecture.md: a2e8338399d797055a9432a32e73720f283a50f4
+architecture.zh.md: e282b35097b6f27b56f8e7a48ea2b6a553e8333e
diff --git a/docs/architecture.md b/docs/architecture.md
index d1051eecf5..a2e8338399 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -167,7 +167,7 @@ Exceptions combine layers: LLM interface/consumer; filesystem policy; web regist
 
 ### Bundles And Apps
 
-`dsh-agent-spine-demo` bundles a spine and optional goals. App packages own the TUI, one-shot CLI, and ACP/JSON-RPC front doors ([README](../packages/examples/agent-spine-demo/README.md), [ui/](../packages/ui/README.md)). `dsh-jsonrpc-agent` boots external `cordis.yml`; the Python SDK supplies a default only without explicit config ([Python SDK](../python/README.md)). Thin deployments use swappable backends and optional tools ([examples/](../examples/AGENTS.md), [runnable wirings](cookbook/extension-cookbook.md#runnable-wirings), [graph atlas](graph-atlas.md)).
+`dsh-agent-spine-demo` bundles a spine and goals. App packages own TUI, CLI, ACP automation, and JSON-RPC front doors ([README](../packages/examples/agent-spine-demo/README.md), [acp/](../packages/acp/README.md), [ui/](../packages/ui/README.md)). `dsh-jsonrpc-agent` boots external `cordis.yml`; the Python SDK supplies a default only without explicit config ([Python SDK](../python/README.md)). Thin deployments use swappable backends and optional tools ([examples/](../examples/AGENTS.md), [runnable wirings](cookbook/extension-cookbook.md#runnable-wirings), [graph atlas](graph-atlas.md)).
 
 ### Where New Behavior Goes
 
diff --git a/docs/architecture.zh.md b/docs/architecture.zh.md
index 502c0248a9..e282b35097 100644
--- a/docs/architecture.zh.md
+++ b/docs/architecture.zh.md
@@ -167,7 +167,7 @@ forever:
 
 ### 组合包与应用
 
-`dsh-agent-spine-demo` 组合一套主干和可选目标。应用包负责 TUI、单次运行的 CLI（命令行界面）以及 ACP/JSON-RPC 入口（[README](../packages/examples/agent-spine-demo/README.md)、[ui/](../packages/ui/README.md)）。`dsh-jsonrpc-agent` 启动外部 `cordis.yml`；Python SDK 仅在没有显式配置时提供默认项（[Python SDK](../python/README.md)）。轻量部署使用可替换后端和可选工具（[examples/](../examples/AGENTS.md)、[可运行接线](cookbook/extension-cookbook.md#runnable-wirings)、[图谱](graph-atlas.md)）。
+`dsh-agent-spine-demo` 组合一套主干和目标。应用包负责 TUI、CLI（命令行界面）、ACP 自动化入口和 JSON-RPC 入口（[README](../packages/examples/agent-spine-demo/README.md)、[acp/](../packages/acp/README.md)、[ui/](../packages/ui/README.md)）。`dsh-jsonrpc-agent` 启动外部 `cordis.yml`；Python SDK 仅在没有显式配置时提供默认项（[Python SDK](../python/README.md)）。轻量部署使用可替换后端和可选工具（[examples/](../examples/AGENTS.md)、[可运行接线](cookbook/extension-cookbook.md#runnable-wirings)、[图谱](graph-atlas.md)）。
 
 ### 新行为的归属位置
 
diff --git a/docs/capability-seams.md b/docs/capability-seams.md
index a27d325e31..ceb0e9e259 100644
--- a/docs/capability-seams.md
+++ b/docs/capability-seams.md
@@ -35,7 +35,6 @@ flowchart LR
   pkg_tool_bash["tool-bash"]
   pkg_hooks_claude["hooks-claude"]
   pkg_hooks_codex["hooks-codex"]
-  pkg_acp["acp"]
   svc_sessionQuery["ctx.sessionQuery<br/>Session reads, traces, filters, and search"]
   pkg_session_reference["session-reference"]
   svc_sessionReferences["ctx.sessionReferences<br/>Cross-session snapshot preparation"]
@@ -67,6 +66,7 @@ flowchart LR
   svc_skills["ctx.skills<br/>Skill provider registry"]
   pkg_skill_local["skill-local"]
   svc_agents["ctx.agents<br/>Agent service"]
+  pkg_acp["acp"]
   pkg_tui_demo["tui-demo"]
   svc_agentLoop["ctx.agentLoop<br/>Concrete loop driver"]
   pkg_agent_spine_demo["agent-spine-demo"]
@@ -123,7 +123,6 @@ flowchart LR
   pkg_workflow_workerthread["workflow-workerthread"]
   pkg_tool_workflow["tool-workflow"]
   pkg_acp --> svc_approval
-  pkg_acp --> svc_userInteraction
   pkg_agent --> svc_agents
   pkg_agent_loop --> svc_agentLoop
   pkg_approval --> svc_approval
@@ -197,7 +196,6 @@ flowchart LR
   svc_bash --> pkg_hooks_codex
   svc_bash --> pkg_tool_bash
   svc_codeRuntime --> pkg_tools
-  svc_commands --> pkg_acp
   svc_commands --> pkg_tui
   svc_compact --> pkg_compact_basic
   svc_fs --> pkg_tool_fs
@@ -207,15 +205,12 @@ flowchart LR
   svc_invariants --> pkg_session
   svc_llm --> pkg_agent_loop
   svc_llm --> pkg_compact_basic
-  svc_permission --> pkg_acp
-  svc_planMode --> pkg_acp
   svc_pty --> pkg_tool_pty
   svc_sandbox --> pkg_bash_sandbox
   svc_sandbox --> pkg_pty_local
   svc_sandboxPolicy --> pkg_bash_sandbox
   svc_sandboxPolicy --> pkg_fs_sandbox
   svc_sandboxPolicy --> pkg_pty_local
-  svc_sessionPersistence --> pkg_acp
   svc_sessionPersistence --> pkg_agent_loop
   svc_sessionPersistence --> pkg_hooks_claude
   svc_sessionPersistence --> pkg_hooks_codex
@@ -223,7 +218,6 @@ flowchart LR
   svc_sessionPersistence --> pkg_session_query_sqlite
   svc_sessionPersistence --> pkg_tool_bash
   svc_sessionQuery --> pkg_session_reference
-  svc_sessionReferences --> pkg_acp
   svc_sessionReferences --> pkg_tui
   svc_sessions --> pkg_agent
   svc_sessions --> pkg_agent_loop
@@ -248,7 +242,6 @@ flowchart LR
   svc_tasks --> pkg_tool_tasks
   svc_tokenMeter --> pkg_compact_basic
   svc_toolResultPrune --> pkg_compact_basic
-  svc_tools --> pkg_acp
   svc_tools --> pkg_agent_loop
   svc_tools --> pkg_tool_ask_user
   svc_tools --> pkg_tool_bash
@@ -259,7 +252,6 @@ flowchart LR
   svc_tools --> pkg_tool_subagent
   svc_tools --> pkg_tool_todo
   svc_tools --> pkg_tool_web
-  svc_userInteraction --> pkg_acp
   svc_userInteraction --> pkg_tool_ask_user
   svc_userInteraction --> pkg_tui
   svc_web --> pkg_tool_web
@@ -275,18 +267,18 @@ flowchart LR
 | `ctx.toolResultPrune` | `core` | [`compact-tool-result-prune`](../packages/compact/compact-tool-result-prune) | - | [`compact-basic`](../packages/compact/compact-basic) | - | Rewrites oversized current tool results through replayable single-node surface replacements before summary compaction. |
 | `ctx.sessions` | `core` | [`session`](../packages/core/session) | - | [`agent-loop`](../packages/core/agent-loop), [`agent`](../packages/core/agent), [`cli-demo`](../packages/examples/cli-demo), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`invariants`](../packages/support/invariants) | - | Owns append-only Session instances and emits the durable session event feed. |
 | `ctx.invariants` | `core` | [`invariants`](../packages/support/invariants) | - | [`session`](../packages/core/session), [`agent`](../packages/core/agent), [`scope`](../packages/core/scope), [`agent-loop`](../packages/core/agent-loop) | - | Companion subpaths register owner-local checks; the service owns selection, uniqueness, child fibers, and package-attributed failures. |
-| `ctx.sessionPersistence` | `seam` | [`session-persistence`](../packages/session-persistence/session-persistence) | [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`session-persistence-sqlite`](../packages/session-persistence/session-persistence-sqlite) | [`agent-loop`](../packages/core/agent-loop), [`tool-bash`](../packages/bash/tool-bash), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`acp`](../packages/ui/acp), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite) | - | Backends persist the same SessionEvent vocabulary; apps choose a backend at composition time. |
+| `ctx.sessionPersistence` | `seam` | [`session-persistence`](../packages/session-persistence/session-persistence) | [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`session-persistence-sqlite`](../packages/session-persistence/session-persistence-sqlite) | [`agent-loop`](../packages/core/agent-loop), [`tool-bash`](../packages/bash/tool-bash), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite) | - | Backends persist the same SessionEvent vocabulary; apps choose a backend at composition time. |
 | `ctx.sessionQuery` | `seam` | [`session-query`](../packages/session-query/session-query) | [`session-query-sqlite`](../packages/session-query/session-query-sqlite) | [`session-reference`](../packages/context/session-reference) | - | The interface supplies exact reads, filters, and traces; its concrete backend adds full-text reconciliation, ranking, snippets, and cursor generations on the same service. |
-| `ctx.sessionReferences` | `core` | [`session-reference`](../packages/context/session-reference) | - | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | Projects bounded current-surface conversation snapshots into durable untrusted message context; host adapters own mention syntax. |
+| `ctx.sessionReferences` | `core` | [`session-reference`](../packages/context/session-reference) | - | [`tui`](../packages/ui/tui) | - | Projects bounded current-surface conversation snapshots into durable untrusted message context; host adapters own mention syntax. |
 | `ctx.sessionTitle` | `seam` | [`session-title`](../packages/session-title/session-title) | [`session-title-first-message-llm`](../packages/session-title/session-title-first-message-llm), [`session-title-all-messages-llm`](../packages/session-title/session-title-all-messages-llm) | - | - | Owns the deterministic fallback, latest-title fold, and sole optional asynchronous provider registration. |
 | `ctx.systemPrompt` | `core` | [`system-prompt`](../packages/core/system-prompt) | - | [`agent-loop`](../packages/core/agent-loop), [`tools`](../packages/core/tools), [`tool-fs`](../packages/fs/tool-fs), [`tool-pty`](../packages/pty/tool-pty), [`tool-web`](../packages/web/tool-web) | - | Collects prompt sections and model-facing tool schemas for each step. |
-| `ctx.tools` | `core` | [`tools`](../packages/core/tools) | - | [`agent-loop`](../packages/core/agent-loop), [`tool-ask-user`](../packages/ui/tool-ask-user), [`tool-bash`](../packages/bash/tool-bash), [`tool-cordis`](../packages/cordis/tool-cordis), [`tool-fs`](../packages/fs/tool-fs), [`tool-pty`](../packages/pty/tool-pty), [`tool-skill`](../packages/skill/tool-skill), [`tool-subagent`](../packages/subagent/tool-subagent), [`tool-todo`](../packages/todo/tool-todo), [`tool-web`](../packages/web/tool-web), [`acp`](../packages/ui/acp) | - | Registers capabilities, owns Code Mode transport, and routes calls through pre-policy, monotonic guards, around dispatch, post-policy, and final-result observation. |
-| `ctx.userInteraction` | `seam` | [`user-interaction`](../packages/ui/user-interaction) | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | [`tool-ask-user`](../packages/ui/tool-ask-user), [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | UI front doors provide the active human-answer provider; tool-ask-user pauses a tool call on the provider-neutral ask() promise. |
-| `ctx.planMode` | `core` | [`plan-mode`](../packages/plan/plan-mode) | - | [`acp`](../packages/ui/acp) | - | Folds logged plan/mode state, flushes user selections at turn boundaries, renders deployment-owned guidance, registers /plan, and keeps the plan-exit schema stable across transitions. |
-| `ctx.commands` | `core` | [`commands`](../packages/ui/commands) | - | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | Plugins register direct human commands; TUI and ACP consume the same effective per-agent catalog without sending invocations to the model. |
+| `ctx.tools` | `core` | [`tools`](../packages/core/tools) | - | [`agent-loop`](../packages/core/agent-loop), [`tool-ask-user`](../packages/ui/tool-ask-user), [`tool-bash`](../packages/bash/tool-bash), [`tool-cordis`](../packages/cordis/tool-cordis), [`tool-fs`](../packages/fs/tool-fs), [`tool-pty`](../packages/pty/tool-pty), [`tool-skill`](../packages/skill/tool-skill), [`tool-subagent`](../packages/subagent/tool-subagent), [`tool-todo`](../packages/todo/tool-todo), [`tool-web`](../packages/web/tool-web) | - | Registers capabilities, owns Code Mode transport, and routes calls through pre-policy, monotonic guards, around dispatch, post-policy, and final-result observation. |
+| `ctx.userInteraction` | `seam` | [`user-interaction`](../packages/ui/user-interaction) | [`tui`](../packages/ui/tui) | [`tool-ask-user`](../packages/ui/tool-ask-user), [`tui`](../packages/ui/tui) | - | UI front doors provide the active human-answer provider; tool-ask-user pauses a tool call on the provider-neutral ask() promise. |
+| `ctx.planMode` | `core` | [`plan-mode`](../packages/plan/plan-mode) | - | - | - | Folds logged plan/mode state, flushes user selections at turn boundaries, renders deployment-owned guidance, registers /plan, and keeps the plan-exit schema stable across transitions. |
+| `ctx.commands` | `core` | [`commands`](../packages/ui/commands) | - | [`tui`](../packages/ui/tui) | - | Plugins register direct human commands; TUI consumes the effective per-agent catalog without sending invocations to the model. |
 | `ctx.tui` | `bundle` | [`tui`](../packages/ui/tui) | - | - | - | One TUI front door provides a FIFO overlay host; injected plugins receive caller-fiber ownership without access to pi-tui or terminal lifecycle state. |
 | `ctx.skills` | `seam` | [`skill`](../packages/skill/skill) | [`skill-local`](../packages/skill/skill-local) | [`tool-skill`](../packages/skill/tool-skill) | - | Merges provider skill catalogs; tool-skill renders the session-prefix catalog and loads complete skill bodies. |
-| `ctx.agents` | `core` | [`agent`](../packages/core/agent) | - | [`agent-loop`](../packages/core/agent-loop), [`acp`](../packages/ui/acp), [`cli-demo`](../packages/examples/cli-demo), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`tui-demo`](../packages/examples/tui-demo) | - | Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation. |
+| `ctx.agents` | `core` | [`agent`](../packages/core/agent) | - | [`agent-loop`](../packages/core/agent-loop), [`acp`](../packages/acp/acp), [`cli-demo`](../packages/examples/cli-demo), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`tui-demo`](../packages/examples/tui-demo) | - | Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation. |
 | `ctx.agentLoop` | `bundle` | [`agent-loop`](../packages/core/agent-loop) | - | [`agent-spine-demo`](../packages/examples/agent-spine-demo) | - | The one concrete loop plugin; extension packages depend on dsh-agent events and services, not on this package. |
 | `ctx.goals` | `core` | [`goal`](../packages/goal/goal) | - | - | - | Folds revisioned objective state from the session log and keeps live continuation activation process-local. |
 | `ctx.bash` | `seam` | [`bash`](../packages/bash/bash) | [`bash-local`](../packages/bash/bash-local), [`bash-sandbox`](../packages/bash/bash-sandbox) | [`tool-bash`](../packages/bash/tool-bash), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) | - | The model-facing bash tools and hook bridges consume this seam; sandboxed or remote executors replace bash-local without touching them. |
@@ -294,8 +286,8 @@ flowchart LR
 | `ctx.pty` | `seam` | [`pty`](../packages/pty/pty) | [`pty-local`](../packages/pty/pty-local) | [`tool-pty`](../packages/pty/tool-pty) | - | The registry owns exact-Agent session identity and cleanup; backends own terminal mechanics, while tool-pty exposes the owner-scoped model surface. |
 | `ctx.sandbox` | `seam` | [`sandbox`](../packages/sandbox/sandbox) | [`sandbox-local`](../packages/sandbox/sandbox-local) | [`bash-sandbox`](../packages/bash/bash-sandbox), [`pty-local`](../packages/pty/pty-local) | - | Consumers hand over the exact argv they are about to spawn; same-world backends wrap it under a per-call policy and report enforcement. |
 | `ctx.sandboxPolicy` | `core` | [`sandbox-policy`](../packages/sandbox/sandbox-policy) | - | [`bash-sandbox`](../packages/bash/bash-sandbox), [`fs-sandbox`](../packages/fs/fs-sandbox), [`pty-local`](../packages/pty/pty-local) | - | The one home for the deployment default mode + workspace root; only the sandboxed executor and provider read the service (the tool layers use the pure `sandbox/mode` fold it also exports). Both enforcing families read it so bash and fs cannot confine to different roots. |
-| `ctx.approval` | `seam` | `approval` | [`acp`](../packages/ui/acp) | [`tools`](../packages/core/tools), [`tool-bash`](../packages/bash/tool-bash) | - | One-shot permission decisions dispatched over the `approval/request` waterfall; answerers are listeners (the ACP bridge for its own agents), absence fails closed to `unavailable`. |
-| `ctx.permission` | `core` | [`permission`](../packages/ui/permission) | - | [`acp`](../packages/ui/acp) | - | User-facing preset table (`workspace-write`/`danger-full-access`) bundling the sandbox-mode and approval-policy knobs; a switch writes one `permission/preset` event through to both knob events. |
+| `ctx.approval` | `seam` | `approval` | [`acp`](../packages/acp/acp) | [`tools`](../packages/core/tools), [`tool-bash`](../packages/bash/tool-bash) | - | One-shot permission decisions dispatched over the `approval/request` waterfall; answerers are listeners (the ACP bridge for its own agents), absence fails closed to `unavailable`. |
+| `ctx.permission` | `core` | [`permission`](../packages/ui/permission) | - | - | - | User-facing preset table (`workspace-write`/`danger-full-access`) bundling the sandbox-mode and approval-policy knobs; a switch writes one `permission/preset` event through to both knob events. |
 | `ctx.codeRuntime` | `seam` | [`code-runtime`](../packages/code-runtime/code-runtime) | [`code-runtime-worker`](../packages/code-runtime/code-runtime-worker) | [`tools`](../packages/core/tools) | - | Runs one model-written program against host-provided async bindings; backends differ by substrate and language (the tool registry consumes it for Code Mode). |
 | `ctx.fs` | `seam` | [`fs`](../packages/fs/fs) | [`fs-local`](../packages/fs/fs-local), [`fs-sandbox`](../packages/fs/fs-sandbox) | [`tool-fs`](../packages/fs/tool-fs) | [`fs-policy`](../packages/fs/fs-policy) | tool-fs executes read/write/edit through ctx.fs; fs-sandbox fences mutations by the shared sandbox mode; fs-policy contributes observed-state checks through the fs/* event gate. |
 | `ctx.compact` | `seam` | [`compact`](../packages/compact/compact) | [`compact-basic`](../packages/compact/compact-basic) | [`compact-basic`](../packages/compact/compact-basic) | - | The basic backend consumes post-step pressure and request-error recovery events; a model-facing compact tool remains deferred. |
diff --git a/docs/config-catalog.md b/docs/config-catalog.md
index b89c79e520..2b5b1a7da3 100644
--- a/docs/config-catalog.md
+++ b/docs/config-catalog.md
@@ -11,14 +11,14 @@ A `Requires:` line lists the service keys the plugin `inject`s: its `cordis.yml`
 
 ## `@deepseek-ai/dsh-acp`
 
-Requires: `agents` · `commands` · `sessionPersistence` · `sessionQuery` · `tools` · `userInteraction` · `llm` · `systemPrompt`
+Requires: `agents`
 
 ```ts config-catalog
-/** Plugin config: the agent template ACP sessions are created from. */
+/** Plugin config: the provider/model target used for each ACP-created agent. */
 export interface AcpConfig {
   /** Provider route for created agents. */
   provider?: string
-  /** Model name for created agents (must have a registered adapter). */
+  /** Model name for created agents. */
   model?: string
   /** Runtime-only transport override; production uses stdio. */
   stream?: Stream
@@ -27,15 +27,14 @@ export interface AcpConfig {
 
 Depends on: `Stream` (`@agentclientprotocol/sdk`)
 
-Source: [`packages/ui/acp/src/index.ts:285`](../packages/ui/acp/src/index.ts)
+Source: [`packages/acp/acp/src/index.ts:56`](../packages/acp/acp/src/index.ts)
 
 ## `@deepseek-ai/dsh-acp-demo`
 
 ```ts config-catalog
 /**
- * App config: the swappable per-deployment values. `provider` and `model` configure the
- * agent template the ACP bridge creates each session's agent from (NOT a
- * pre-created agent — ACP creates agents at `session/new`); `persona` is the
+ * App config: the swappable per-deployment values. `provider` and `model` configure
+ * each agent the ACP bridge creates at `session/new`; `persona` is the
  * deployment persona (forwarded to the system-prompt plugin); `toolOrder` is
  * the explicit model-facing tool order (forwarded to the system-prompt plugin);
  * `tools` is the tool registry's config (its presentation `mode`, forwarded
@@ -58,14 +57,12 @@ export interface Config {
   dshHome?: string
   /** Fallback session-title limits forwarded through agent-spine-demo. */
   sessionTitle?: NonNullable<agentCore.Config['sessionTitle']>
-  /** Directory for JSONL sessions and the derived query index. Defaults to `./.sessions`. */
+  /** Directory for JSONL sessions. Defaults to `./.sessions`. */
   persistenceRoot?: string
   /** Write delta-chunk runs as packed storage rows (the JSONL backend's `packChunks`). Defaults to `false`. */
   packChunks?: boolean
   /** JSONL artifact encoding; defaults to checksummed Zstandard frames. */
   persistenceCompression?: JsonlCompression
-  /** Cross-session reference discovery and snapshot byte budgets. */
-  sessionReferences?: SessionReferenceConfig
   /** Controls automatic AGENTS.md/CLAUDE.md loading; configure a byte budget or set `false`. */
   workspaceContext: agentCore.Config['workspaceContext']
   /** Skill registry, local-provider, and model-facing consumer config forwarded to agent-spine-demo. */
@@ -74,16 +71,16 @@ export interface Config {
   toolBash?: NonNullable<agentCore.Config['toolBash']>
   /** Generic background-task controls forwarded through agent-core; set false to omit their tool surface. */
   toolTasks?: NonNullable<agentCore.Config['toolTasks']>
-  /** Persisted same-session goals; owner defaults enable them, or false disables the stack and command. */
+  /** Persisted same-session goals; owner defaults enable them, or false disables the stack and tools. */
   goals?: agentCore.GoalConfig | false
   /** Bounded transient model-request retry policy forwarded through agent-core. */
   llmRetry?: NonNullable<agentCore.Config['llmRetry']>
 }
 ```
 
-Depends on: [`agentCore`](../packages/examples/agent-spine-demo/src/index.ts) · [`JsonlCompression`](../packages/session-persistence/session-persistence-jsonl/src/index.ts) · [`SessionReferenceConfig`](#deepseek-aidsh-session-reference) · [`ToolsConfig`](#deepseek-aidsh-tools)
+Depends on: [`agentCore`](../packages/examples/agent-spine-demo/src/index.ts) · [`JsonlCompression`](../packages/session-persistence/session-persistence-jsonl/src/index.ts) · [`ToolsConfig`](#deepseek-aidsh-tools)
 
-Source: [`packages/examples/acp-demo/src/index.ts:44`](../packages/examples/acp-demo/src/index.ts)
+Source: [`packages/examples/acp-demo/src/index.ts:37`](../packages/examples/acp-demo/src/index.ts)
 
 ## `@deepseek-ai/dsh-agent-loop`
 
@@ -622,7 +619,7 @@ export interface ReplayProviderConfig {
   id: string
   /** Selector label; defaults to {@link id}. */
   name?: string
-  /** Advisory models exposed to clients such as ACP editors. */
+  /** Advisory models exposed to replay scenarios that exercise discovery. */
   models?: ReplayModelConfig[]
 }
 
@@ -639,7 +636,7 @@ export interface ReplayModelConfig {
 }
 ```
 
-Source: [`packages/support/llm-replay/src/index.ts:387`](../packages/support/llm-replay/src/index.ts)
+Source: [`packages/support/llm-replay/src/index.ts:392`](../packages/support/llm-replay/src/index.ts)
 
 ## `@deepseek-ai/dsh-llm-retry`
 
diff --git a/docs/cookbook/adding-a-tool.i18n.yaml b/docs/cookbook/adding-a-tool.i18n.yaml
index 2c8f18513b..4c0e480bee 100644
--- a/docs/cookbook/adding-a-tool.i18n.yaml
+++ b/docs/cookbook/adding-a-tool.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-adding-a-tool.md: 788c967cffa9df06e8d96e190930d69b9f2182ed
-adding-a-tool.zh.md: 4ff9ce25a66625435ccba4454f2ac4b5472e5668
+adding-a-tool.md: c4deed8e13afcdc8e1a714364b086b8b0da018c1
+adding-a-tool.zh.md: 103c92b596a90192aae5a6b4d1e42fbcf052cf66
diff --git a/docs/cookbook/adding-a-tool.md b/docs/cookbook/adding-a-tool.md
index 788c967cff..c4deed8e13 100644
--- a/docs/cookbook/adding-a-tool.md
+++ b/docs/cookbook/adding-a-tool.md
@@ -64,9 +64,9 @@ In [Code Mode](../../packages/core/tools/README.md), every visible registered to
 
 Design `output.schema` as a useful programmatic API: return handles and fields directly, allow scalar/array/null roots when they are the honest value, and keep human explanation in `output.render`. Intermediate values are execution-local, are not persisted or prompt-truncated, and have no byte cap, so the producer's truthful acquisition bounds and process memory still matter. Only the outer `run_code` logs/result cross the configurable output cap and model-facing spill pipeline.
 
-## How your tool renders in an editor (ACP presentation)
+## How your tool renders in a UI
 
-Your tool's `output.render` returns model-facing content; its **editor card** is a separate concern declared through pure presentation projections and optional `presentCall` / `presentResult` methods. Design these alongside the canonical value—an editor (Zed, over the ACP bridge) shows the card, and a tool with no UI presentation falls back to a generic card (title = tool name, raw args as input).
+Your tool's `output.render` returns model-facing content; its **UI card** is a separate concern declared through pure presentation projections and optional `presentCall` / `presentResult` methods. Design these alongside the canonical value. A tool with no UI presentation falls back to a generic card (title = tool name, raw args as input).
 
 Both methods return a **`card`-tagged render intent** — pick the card kind that matches what your tool does:
 
@@ -76,17 +76,17 @@ Both methods return a **`card`-tagged render intent** — pick the card kind tha
   - `{ card: 'diff', title, diffs, locations? }` — your call creates or modifies a file. `diffs: [{ path, oldText, newText }]` (`oldText: null` for a new file) renders as an inline diff card. (tool-fs `write`/`edit`.)
 - `presentResult(args, { content, isError, meta? })` returns the completed card:
   - `generic` supplies an optional title and content.
-  - `terminal` supplies raw output and optional exit metadata; the bridge renders the capability-specific or fenced fallback view.
-  - `diff` supplies applied hunks, often derived by `output.presentationMeta` and carried in persisted `result.meta` so replay reproduces them. Mutation tools keep a diff result because an ACP update replaces the pending card's content.
+  - `terminal` supplies raw output and optional exit metadata; each UI renders its capable or fallback view.
+  - `diff` supplies applied hunks, often derived by `output.presentationMeta` and carried in persisted `result.meta` so replay reproduces them. Mutation tools keep a diff result because the completed view replaces the pending card.
 
 Hard rules (they bite if broken):
 
-- **Purity.** These run on live streaming AND on session-log REPLAY, so they must be pure functions of `args` (+ the result) — NO I/O, NO reading session state, NO clock/random. A diff is derived from the args (`write` uses `oldText: null` because a call-time presenter has no prior file content); the BRIDGE, not the tool, fills the session cwd and relativizes a display-path title. If you find yourself wanting the file's old content or the working directory inside `presentCall`, stop — that belongs on the bridge or a future result-event shape, not the presenter.
-- **UI-only formatting stays out of the model result.** A fenced ` ```console ` block, a diff, a relativized path—none of these belongs in the canonical value or Native content merely to serve an editor. `output.render` owns model-facing prose; `presentationMeta` plus the card presenters own replayable UI state. A `terminal` result view carries raw output and the bridge adds fences.
+- **Purity.** These run on live streaming AND on session-log REPLAY, so they must be pure functions of `args` (+ the result) — NO I/O, NO reading session state, NO clock/random. A diff is derived from the args (`write` uses `oldText: null` because a call-time presenter has no prior file content); the UI adapter, not the tool, supplies session context. If you find yourself wanting the file's old content or the working directory inside `presentCall`, stop — that belongs in durable result metadata or the adapter, not the presenter.
+- **UI-only formatting stays out of the model result.** A fenced ` ```console ` block, a diff, a relativized path—none of these belongs in the canonical value or Native content merely to serve a UI. `output.render` owns model-facing prose; `presentationMeta` plus the card presenters own replayable UI state. A `terminal` result view carries raw output and the adapter adds any fallback framing.
 - **`defineTool` soft-validates the display path.** A malformed/older logged arg shape makes the wrapper return `undefined` (a generic fallback) rather than throw — display must never crash a replay.
 
-The neutral vocabulary lives in `dsh-tools` (never import an ACP type into a tool); the ACP bridge maps each `card` to the wire. The design and the why are in [the render-intent-union Agent Note](../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md); `dsh-tool-fs` (generic/diff) and `dsh-tool-bash` (terminal) are the reference implementations.
+The neutral vocabulary lives in `dsh-tools`; tools never import a UI or transport type. The TUI and host/client runtime map each `card` into their own view. The design and the why are in [the render-intent-union Agent Note](../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md); `dsh-tool-fs` (generic/diff) and `dsh-tool-bash` (terminal) are the reference implementations.
 
 ## Tests every tool needs
 
-Cover argument rejection, every canonical value and Native rendering shape, output-schema rejection, and HMR disposal. For a side-effecting tool, drive the real tool through the agent loop with a scripted `MockAdapter` and assert its `tool/call` and projected `tool/result` session events; prove the canonical value itself is not persisted. For an editor card, assert the exact `presentCall` and `presentResult` views and add an [ACP snapshot](../../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md) through the real bridge; a terminal card's scenario sets `terminalOutput: true` to exercise the capable-client path.
+Cover argument rejection, every canonical value and Native rendering shape, output-schema rejection, and HMR disposal. For a side-effecting tool, drive the real tool through the agent loop with a scripted `MockAdapter` and assert its `tool/call` and projected `tool/result` session events; prove the canonical value itself is not persisted. For a UI card, assert the exact `presentCall` and `presentResult` views and exercise the owning TUI or host/client projection. Add an assembled snapshot for the shipped model or UI behavior the tool changes.
diff --git a/docs/cookbook/adding-a-tool.zh.md b/docs/cookbook/adding-a-tool.zh.md
index 4ff9ce25a6..103c92b596 100644
--- a/docs/cookbook/adding-a-tool.zh.md
+++ b/docs/cookbook/adding-a-tool.zh.md
@@ -64,9 +64,9 @@ producer 提供同步的 `cancel`、在资源清理后 settle 且不 reject 的
 
 请把 `output.schema` 设计为实用的程序化 API：直接返回句柄与字段；当标量、数组或 null 确实就是结果时，允许采用相应的根类型；将面向人类的解释放入 `output.render`。中间值只存在于执行期间，不会被持久化或按提示词上限截断，也不设字节上限，因此生产方如实声明的采集边界和进程内存仍然重要。只有外层 `run_code` 日志／结果会受到可配置输出上限和面向模型的输出落盘流水线约束。
 
-## 工具在编辑器中的渲染方式（ACP 展示）
+## 工具在 UI 中的渲染方式
 
-工具的 `output.render` 返回模型可见的内容；其**编辑器卡片**是另一项独立关注点，通过纯展示投影以及可选的 `presentCall`／`presentResult` 方法声明。请将这些内容与规范值一并设计：编辑器（如 Zed，通过 ACP（Agent Client Protocol）桥接）会展示该卡片，没有 UI 展示方法的工具则回退到通用卡片（标题 = 工具名，原始 args 作为输入）。
+工具的 `output.render` 返回模型可见的内容；其 **UI 卡片** 是另一项独立关注点，通过纯展示投影以及可选的 `presentCall`／`presentResult` 方法声明。请将这些内容与规范值一并设计。没有 UI 展示方法的工具会回退到通用卡片（标题 = 工具名，原始 args 作为输入）。
 
 两个方法都返回一个 **`card` 标签的渲染意图**——选择与你的工具行为匹配的卡片类型：
 
@@ -76,17 +76,17 @@ producer 提供同步的 `cancel`、在资源清理后 settle 且不 reject 的
   - `{ card: 'diff', title, diffs, locations? }`——你的调用创建或修改文件。`diffs: [{ path, oldText, newText }]`（新文件时 `oldText: null`）渲染为内联 diff 卡片。（tool-fs `write`/`edit`。）
 - `presentResult(args, { content, isError, meta? })` 返回完成后的卡片：
   - `generic` 提供可选的标题和内容。
-  - `terminal` 提供原始输出和可选的退出元数据；桥接层渲染能力特定或围栏回退视图。
-  - `diff` 提供已应用的 hunk，通常由 `output.presentationMeta` 派生并通过持久化的 `result.meta` 携带，使回放能重现它们。变更类工具保留 diff 结果，因为 ACP 更新会替换 pending 卡片的内容。
+  - `terminal` 提供原始输出和可选的退出元数据；各 UI 根据自身能力渲染对应视图或回退视图。
+  - `diff` 提供已应用的 hunk，通常由 `output.presentationMeta` 派生并通过持久化的 `result.meta` 携带，使回放能重现它们。变更类工具保留 diff 结果，因为完成后的视图会替换 pending 卡片。
 
 硬性规则（违反会出问题）：
 
-- **纯函数。** 这些方法在实时流式输出和会话日志回放时都会运行，因此必须是 `args`（加 result）的纯函数——不做 I/O、不读会话状态、不用时钟/随机数。diff 从 args 派生（`write` 使用 `oldText: null`，因为调用时的展示器没有文件先前内容）；**桥接层**（而非工具）填充会话 cwd 并相对化展示路径标题。如果你发现自己想在 `presentCall` 内获取文件旧内容或工作目录，请停下——那属于桥接层或未来的 result-event 形态，不属于展示器。
-- **UI 格式不进入模型结果。** 围栏 ` ```console ` 块、diff、相对化路径均不应仅为服务编辑器而进入规范值或 Native 内容。`output.render` 负责模型可见的自然语言；`presentationMeta` 和卡片展示器负责可回放的 UI 状态。`terminal` 结果视图携带原始输出，由桥接层添加围栏。
+- **纯函数。** 这些方法在实时流式输出和会话日志回放时都会运行，因此必须是 `args`（加 result）的纯函数——不做 I/O、不读会话状态、不用时钟/随机数。diff 从 args 派生（`write` 使用 `oldText: null`，因为调用时的展示器没有文件先前内容）；会话上下文由 UI 适配器而非工具提供。如果你发现自己想在 `presentCall` 内获取文件旧内容或工作目录，请停下：那属于持久结果元数据或适配器，不属于展示器。
+- **UI 格式不进入模型结果。** 围栏 ` ```console ` 块、diff、相对化路径均不应仅为服务 UI 而进入规范值或 Native 内容。`output.render` 负责模型可见的自然语言；`presentationMeta` 和卡片展示器负责可回放的 UI 状态。`terminal` 结果视图携带原始输出，由适配器按需添加回退格式。
 - **`defineTool` 对展示路径做软校验。** 格式错误或旧版日志中的 arg 形态会使包装器返回 `undefined`（通用回退）而非抛异常——展示绝不能导致回放崩溃。
 
-中性词汇定义在 `dsh-tools` 中（绝不在工具中导入 ACP 类型）；ACP 桥接层将每个 `card` 映射到协议格式（wire format）。设计与原因见[渲染意图联合体 Agent Note](../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md)；`dsh-tool-fs`（generic/diff）和 `dsh-tool-bash`（terminal）是参考实现。
+中性词汇定义在 `dsh-tools` 中；工具绝不导入 UI 或传输类型。TUI 和 host/client 运行时将每个 `card` 映射到各自的视图。设计与原因见[渲染意图联合体 Agent Note](../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md)；`dsh-tool-fs`（generic/diff）和 `dsh-tool-bash`（terminal）是参考实现。
 
 ## 每个工具必须的测试
 
-覆盖参数拒绝、每种规范值和 Native 渲染形态、输出 schema 拒绝以及 HMR dispose。对于有副作用的工具，使用脚本化的 `MockAdapter` 驱动真实工具通过 agent loop（智能体循环），并断言其 `tool/call` 和投影后的 `tool/result` 会话事件；同时证明规范值本身未被持久化。对于编辑器卡片，断言 `presentCall` 和 `presentResult` 的精确视图，并通过真实桥接层添加一个 [ACP 快照](../../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)；终端卡片的场景设置 `terminalOutput: true` 以覆盖 capable-client 路径。
+覆盖参数拒绝、每种规范值和 Native 渲染形态、输出 schema 拒绝以及 HMR dispose。对于有副作用的工具，使用脚本化的 `MockAdapter` 驱动真实工具通过 agent loop（智能体循环），并断言其 `tool/call` 和投影后的 `tool/result` 会话事件；同时证明规范值本身未被持久化。对于 UI 卡片，断言 `presentCall` 和 `presentResult` 的精确视图，并实际运行所属 TUI 或 host/client 投影。如果工具改变了已交付的模型或 UI 行为，请添加组装应用快照。
diff --git a/docs/cookbook/extension-cookbook.i18n.yaml b/docs/cookbook/extension-cookbook.i18n.yaml
index 5d5dc81f2a..402d2f8cab 100644
--- a/docs/cookbook/extension-cookbook.i18n.yaml
+++ b/docs/cookbook/extension-cookbook.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-extension-cookbook.md: 056be4298ed2bec2b78ed777d58f1f8a60a34b78
-extension-cookbook.zh.md: 41cdd4a7d14f32494d1dd5ae4a63c098d5640bdc
+extension-cookbook.md: 699d9d8829dafde3a314e6d58823926241251a9b
+extension-cookbook.zh.md: 09b3a90bdd7dfeea362af40a10117a653c4e3cf1
diff --git a/docs/cookbook/extension-cookbook.md b/docs/cookbook/extension-cookbook.md
index 056be4298e..699d9d8829 100644
--- a/docs/cookbook/extension-cookbook.md
+++ b/docs/cookbook/extension-cookbook.md
@@ -58,11 +58,11 @@ export function apply(ctx: Context) {
 }
 ```
 
-## A client-driver plugin (external protocol bridge)
+## An external protocol driver
 
-A *client driver* is a UI plugin for a wire-protocol peer. It owns stdio, so stdout logging must be disabled, creates or resumes agents through the factory, maps harness events to protocol messages, and maps requests to `send()` or `cancel()`. Settle each request exactly once from durable `turn/end`, even if rendering fails, and tear agents down with `AgentHandle.dispose()` so disposal reaches quiescence.
+A *protocol driver* adapts a wire peer to `ctx.agents`; it may serve a UI or an automation client. A stdio driver owns stdout, creates or resumes agents through the factory, maps the protocol's requests to `send()` or `cancel()`, and settles each request exactly once from durable `turn/end`. Tear agents down with `AgentHandle.dispose()` so disposal reaches quiescence.
 
-`packages/ui/acp` is the worked example: it bridges the agent to the Agent Client Protocol (JSON-RPC over stdio) so Zed and other ACP editors can drive it. See its README for the full method surface and the permission-prompt answerer it registers on the approval seam.
+[`packages/acp/acp`](../../packages/acp/acp) is the automation-only worked example: it exposes fresh text sessions over Agent Client Protocol JSON-RPC stdio, emits committed assistant text, and registers a one-shot machine permission answerer for agents it owns. Its [README](../../packages/acp/acp/README.md) owns the exact method and lifecycle contract.
 
 ```ts
 import type { Context } from 'cordis'
diff --git a/docs/cookbook/extension-cookbook.zh.md b/docs/cookbook/extension-cookbook.zh.md
index 41cdd4a7d1..09b3a90bdd 100644
--- a/docs/cookbook/extension-cookbook.zh.md
+++ b/docs/cookbook/extension-cookbook.zh.md
@@ -58,11 +58,11 @@ export function apply(ctx: Context) {
 }
 ```
 
-## 客户端驱动插件（外部协议桥接）
+## 外部协议驱动
 
-*客户端驱动*是面向协议格式（wire format）对端的 UI 插件。它拥有 stdio，因此必须禁用 stdout 日志；通过工厂创建或恢复 agent（智能体）；将 harness 事件映射为协议消息；将请求映射为 `send()` 或 `cancel()`。每个请求从持久的 `turn/end` 恰好结算一次（即使渲染失败），并通过 `AgentHandle.dispose()` 拆除 agent 以使 dispose（资源释放）达到静止状态。
+*协议驱动*将协议对端接入 `ctx.agents`；它可以服务于 UI 或自动化客户端。stdio 驱动拥有 stdout，通过工厂创建或恢复 agent（智能体），将协议请求映射为 `send()` 或 `cancel()`，并根据持久的 `turn/end` 对每个请求恰好结算一次。通过 `AgentHandle.dispose()` 拆除 agent，以使 dispose（资源释放）达到静止状态。
 
-`packages/ui/acp` 是完整的工作示例：它将 agent 桥接到 ACP（Agent Client Protocol）（基于 stdio 的 JSON-RPC），使 Zed 及其他 ACP 编辑器能够驱动它。其 README 描述了完整的方法接口以及它在审批 seam 上注册的权限提示应答器。
+[`packages/acp/acp`](../../packages/acp/acp) 是仅面向自动化的完整示例：它通过 ACP（Agent Client Protocol）JSON-RPC stdio 提供全新文本会话，发出已提交的助手文本，并为其拥有的 agent 注册一次性机器权限应答器。其 [README](../../packages/acp/acp/README.md) 描述了精确的方法和生命周期契约。
 
 ```ts
 import type { Context } from 'cordis'
diff --git a/docs/core-data-structures/approval.md b/docs/core-data-structures/approval.md
index 8634415a62..ef0b56c557 100644
--- a/docs/core-data-structures/approval.md
+++ b/docs/core-data-structures/approval.md
@@ -1,6 +1,6 @@
 # User Approval
 
-The user-approval seam of [dsh-user-approval](../../packages/ui/user-approval) answers one question: may this specific action proceed? It owns the shared request/outcome vocabulary, the `ctx.approval` dispatch service, the `approval/request` answerer waterfall, the log-only audit pair, and the per-session `ask`/`never` policy. UI channels such as [dsh-acp](../../packages/ui/acp) provide answerers; callers such as [dsh-tools](../../packages/core/tools) and [dsh-tool-bash](../../packages/bash/tool-bash) consume the closed outcome and fail closed unless it is `allowed-once`.
+The user-approval seam of [dsh-user-approval](../../packages/ui/user-approval) answers one question: may this specific action proceed? It owns the shared request/outcome vocabulary, the `ctx.approval` dispatch service, the `approval/request` answerer waterfall, the log-only audit pair, and the per-session `ask`/`never` policy. UI channels may provide human answerers; the [ACP automation bridge](../../packages/acp/acp) provides one-shot machine decisions for its own agents. Callers such as [dsh-tools](../../packages/core/tools) and [dsh-tool-bash](../../packages/bash/tool-bash) consume the closed outcome and fail closed unless it is `allowed-once`.
 
 Source: [`packages/ui/user-approval/src/index.ts`](../../packages/ui/user-approval/src/index.ts)
 
@@ -46,7 +46,7 @@ type ApprovalOutcome = 'allowed-once' | 'rejected' | 'cancelled' | 'unavailable'
 type ApprovalPolicy = 'ask' | 'never'
 ```
 
-The prompt section states the deterministic `never` behavior and records either policy with a source-owned marker. The pre-step narrator reads that marker from the logged request header after restart; it does not infer state from deployment persona prose. An idle ACP switch is held in the bridge until the next `turn/start`, because approval audit and policy events must remain turn-enclosed for durable replay.
+The prompt section states the deterministic `never` behavior and records either policy with a source-owned marker. The pre-step narrator reads that marker from the logged request header after restart; it does not infer state from deployment persona prose.
 
 ## Approval request
 
diff --git a/docs/core-data-structures/commands.md b/docs/core-data-structures/commands.md
index c33b27ce1c..c36942cf18 100644
--- a/docs/core-data-structures/commands.md
+++ b/docs/core-data-structures/commands.md
@@ -1,15 +1,15 @@
 # Human Commands
 
-The human-command seam of [`dsh-commands`](../../packages/ui/commands). TUI and ACP adapters use it to discover and directly execute plugin-owned commands for an exact agent without creating a model message. The [command Agent Note](../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) owns dispatch and lifecycle rationale; the [package README](../../packages/ui/commands/README.md) owns composition and limitations.
+The human-command seam of [`dsh-commands`](../../packages/ui/commands). Interactive adapters use it to discover and directly execute plugin-owned commands for an exact agent without creating a model message. The [command Agent Note](../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) owns dispatch and lifecycle rationale; the [package README](../../packages/ui/commands/README.md) owns composition and limitations.
 
 Source: [`packages/ui/commands/src/index.ts`](../../packages/ui/commands/src/index.ts)
 
 ## Input metadata
 
-ACP currently exposes one unstructured-input hint. Command availability follows plugin composition: every adapter consuming the registry sees every effective definition.
+The seam exposes one optional unstructured-input hint. Command availability follows plugin composition: every adapter consuming the registry sees every effective definition.
 
 ```ts type-equiv
-/** Immutable command input metadata compatible with ACP unstructured input. */
+/** Immutable metadata for a command's optional unstructured input. */
 interface CommandInputDescriptor {
   /** Placeholder shown before the user supplies free-form input. */
   readonly hint: string
diff --git a/docs/core-data-structures/session.md b/docs/core-data-structures/session.md
index ba1dcb98ba..8249c6ac4c 100644
--- a/docs/core-data-structures/session.md
+++ b/docs/core-data-structures/session.md
@@ -134,7 +134,7 @@ interface OutOfBandSessionEventMap {}
 
 ### `TodoItem` — one todo-list entry
 
-The unit of the `todo/write` event's whole-list snapshot. Deliberately minimal — a `content` line and a three-state `status` (no id, priority, or `activeForm`): the list is replaced wholesale on every write, so entries need no stable identity, and the status triple is exactly the ACP `PlanEntryStatus`, so a UI bridge can map a todo list onto an ACP `plan` 1:1 (synthesizing the priority ACP additionally requires). See the [todo_write Agent Note](../../.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md).
+The unit of the `todo/write` event's whole-list snapshot. Deliberately minimal — a `content` line and a three-state `status` (no id, priority, or `activeForm`): the list is replaced wholesale on every write, so entries need no stable identity. See the [todo_write Agent Note](../../.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md).
 
 ```ts type-equiv
 /**
@@ -143,10 +143,9 @@ The unit of the `todo/write` event's whole-list snapshot. Deliberately minimal 
  *
  * Deliberately minimal: a human-readable `content` line and a three-state
  * `status`. No id, priority, or `activeForm` — the list is replaced wholesale
- * on every write (last-write-wins), so entries need no stable identity, and the
- * status triple is exactly the ACP `PlanEntryStatus`, so a UI bridge can map a
- * todo list onto an ACP `plan` 1:1 (synthesizing the priority ACP additionally
- * requires).
+ * on every write (last-write-wins), so entries need no stable identity. The
+ * three statuses describe the complete portable lifecycle needed by model and
+ * UI consumers.
  */
 interface TodoItem {
   /** What this task is — a short imperative line shown in the UI. */
diff --git a/docs/core-data-structures/tools.md b/docs/core-data-structures/tools.md
index d68e280b24..3f8aad765c 100644
--- a/docs/core-data-structures/tools.md
+++ b/docs/core-data-structures/tools.md
@@ -405,8 +405,8 @@ type ObjectJsonSchema = JsonSchemaNode & { type: 'object' }
 How a tool wants its call shown in a UI (an editor tool-call card, a CLI log line), provider-neutral so a tool describes itself without depending on any client protocol. `presentCall`/`presentResult` return a **`card`-tagged render intent** — a discriminated union a UI bridge switches on:
 
 - `ToolCallView` (pending): `{ card: 'generic', title, kind?, rawInput?, content?, locations? }` (the default card; `locations` is `{ path, line? }[]` files the call reads/modifies, for editor follow-along), `{ card: 'terminal', title, description?, cwd? }` (a shell command → a terminal card), or `{ card: 'diff', title, diffs, locations? }` (a file create/modify → an inline diff card; `diffs` is `{ path, oldText, newText }[]`, `oldText: null` for a new file).
-- `ToolResultView` (completed): `{ card: 'generic', title?, content? }`, `{ card: 'terminal', title?, output?, exitCode?, signal? }` (the captured run output + exit; a capable UI shows an exit-status pill, an incapable one gets a fenced ` ```console ` fallback the bridge derives from `output`), or `{ card: 'diff', title?, diffs }` (a completed file mutation → the change to show, typically the applied hunks with context lines computed from the before/after content, or a whole-file diff when there is no before-image — e.g. a file create. A `tool_call_update`'s content REPLACES the call's content, so a mutation tool returns this even when it duplicates the call-time snippet, to keep the result from clobbering the diff with result text).
+- `ToolResultView` (completed): `{ card: 'generic', title?, content? }`, `{ card: 'terminal', title?, output?, exitCode?, signal? }` (the captured run output + exit; a capable UI shows an exit-status pill, while another may derive a fenced ` ```console ` fallback), or `{ card: 'diff', title?, diffs }` (a completed file mutation → the change to show, typically the applied hunks with context lines computed from the before/after content, or a whole-file diff when there is no before-image). Completed views replace pending views, so mutation tools return a diff result even when it duplicates the call-time snippet.
 
-`ToolCallKind` (`'read' | 'edit' | 'delete' | 'move' | 'search' | 'execute' | 'fetch' | 'other'`) picks an icon on a generic card. `FileLocation` (`{ path, line? }`) and `FileDiff` (`{ path, oldText, newText }`) are the shared file-card vocabulary. The design is pinned in [the render-intent-union Agent Note](../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md); the ACP bridge maps a `diff` card to a `{ type: 'diff' }` content block, a `terminal` card to the `_meta` terminal convention, and relativizes a file card's title against the session cwd.
+`ToolCallKind` (`'read' | 'edit' | 'delete' | 'move' | 'search' | 'execute' | 'fetch' | 'other'`) picks an icon on a generic card. `FileLocation` (`{ path, line? }`) and `FileDiff` (`{ path, oldText, newText }`) are the shared file-card vocabulary. The design is pinned in [the render-intent-union Agent Note](../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md); the TUI and host/client runtime project this neutral vocabulary into their own views.
 
 The full presentation field docs live in [`packages/core/tools/src/presentation.ts`](../../packages/core/tools/src/presentation.ts). The `bash` schema and executor are on [bash.md](bash.md); generic background controls are on [tasks.md](tasks.md).
diff --git a/docs/core-data-structures/user-interaction.md b/docs/core-data-structures/user-interaction.md
index e010b48987..4addad5fa8 100644
--- a/docs/core-data-structures/user-interaction.md
+++ b/docs/core-data-structures/user-interaction.md
@@ -1,6 +1,6 @@
 # User Interaction
 
-The user-interaction seam of [dsh-user-interaction](../../packages/ui/user-interaction). It is the provider-neutral vocabulary a tool or permission plugin uses when it needs the human to answer before the agent can continue. UI surfaces provide the active `UserInteractionProvider`: `dsh-tui` uses keyboard-driven overlays, and `dsh-acp` maps questions to ACP form elicitations.
+The user-interaction seam of [dsh-user-interaction](../../packages/ui/user-interaction). It is the provider-neutral vocabulary a tool or permission plugin uses when it needs the human to answer before the agent can continue. UI surfaces provide the active `UserInteractionProvider`; `dsh-tui` uses keyboard-driven overlays and the host runtime relays requests to its connected client.
 
 Source: [`packages/ui/user-interaction/src/index.ts`](../../packages/ui/user-interaction/src/index.ts)
 
@@ -93,7 +93,7 @@ interface UserInteractionProvider {
 
 ## Errors
 
-`UserInteractionError` extends `HarnessError`, so `ctx.tools.execute()` preserves `{ name, code }` for model-facing tool failures such as `EMPTY_QUESTIONS`, `NO_PROVIDER`, `ASK_ABORTED`, or ACP-side cancellation.
+`UserInteractionError` extends `HarnessError`, so `ctx.tools.execute()` preserves `{ name, code }` for model-facing tool failures such as `EMPTY_QUESTIONS`, `NO_PROVIDER`, `ASK_ABORTED`, or UI-side cancellation.
 
 ```ts type-equiv
 /** Stable error taxonomy for user-interaction failures. */
diff --git a/docs/development.i18n.yaml b/docs/development.i18n.yaml
index 40828094ce..9d2573305e 100644
--- a/docs/development.i18n.yaml
+++ b/docs/development.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-development.md: 4294038e40aa774a006874e6641ca63eea44beeb
-development.zh.md: 1f07c95dd60d0554b945c29e6e3ba8bc6ca9841a
+development.md: f706d54764bbf79d1f13ccb4c412e7b5717b1edb
+development.zh.md: 15f5ae0c514ac412c302a99cb0a662acce510c44
diff --git a/docs/development.md b/docs/development.md
index 4294038e40..f706d54764 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -9,7 +9,7 @@ This onboarding guide helps project contributors get started with the local envi
 - Node.js supports 22.19+ and 24+. CI covers 22.19, 24, and 26; see the [Node engine floor Agent Note](../.agents/notes/implemented/process/2026-07-06-node-engine-floor.md).
 - Corepack-enabled pnpm. The repo pins `pnpm@11.7.0` in `package.json`; run `corepack enable` if `pnpm --version` does not resolve through Corepack.
 - Git.
-- Optional: a DeepSeek API key for the TUI/Headless/ACP agent demos and real-API e2e tests.
+- Optional: a DeepSeek API key for the TUI, headless, and ACP automation demos and real-API e2e tests.
 
 ## First-time setup
 
@@ -142,7 +142,7 @@ The self-referential cordis-agent demo can inspect and modify its live plugin ru
 pnpm run demo:cordis
 ```
 
-The ACP server agent demo exposes the agent over JSON-RPC stdio and also needs `DEEPSEEK_API_KEY`:
+The ACP automation server exposes fresh agent sessions over JSON-RPC stdio and also needs `DEEPSEEK_API_KEY`:
 
 ```sh
 pnpm run demo:acp
diff --git a/docs/development.zh.md b/docs/development.zh.md
index 1f07c95dd6..15f5ae0c51 100644
--- a/docs/development.zh.md
+++ b/docs/development.zh.md
@@ -9,7 +9,7 @@
 - Node.js 支持 22.19+ 与 24+。CI 覆盖 22.19、24 和 26；见 [Node 引擎下限 Agent Note](../.agents/notes/implemented/process/2026-07-06-node-engine-floor.md)。
 - 启用了 Corepack 的 pnpm。仓库在 `package.json` 中固定使用 `pnpm@11.7.0`；如果 `pnpm --version` 无法通过 Corepack 解析，请先运行 `corepack enable`。
 - Git。
-- 可选：一个 DeepSeek API key，用于 TUI/Headless/ACP（Agent Client Protocol） agent（智能体）演示和真实 API 的 e2e 测试。
+- 可选：一个 DeepSeek API key，用于 TUI、headless 和 ACP（Agent Client Protocol）自动化 agent（智能体）演示以及真实 API 的 e2e 测试。
 
 ## 首次搭建
 
@@ -142,7 +142,7 @@ pnpm run demo:tui
 pnpm run demo:cordis
 ```
 
-ACP 服务器 agent 演示通过 JSON-RPC stdio 暴露 agent，同样需要 `DEEPSEEK_API_KEY`：
+ACP 自动化服务器通过 JSON-RPC stdio 提供全新 agent 会话，同样需要 `DEEPSEEK_API_KEY`：
 
 ```sh
 pnpm run demo:acp
diff --git a/docs/event-producer-consumer.md b/docs/event-producer-consumer.md
index 179ad0dcee..427cf7daff 100644
--- a/docs/event-producer-consumer.md
+++ b/docs/event-producer-consumer.md
@@ -14,7 +14,7 @@ This matrix shows which packages dispatch each harness-owned event and which pac
 | `agent/error` | `emit` | [`packages/core/agent/src/types.ts:365`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`goal-session`](../packages/goal/goal-session), `runtime`, [`tui`](../packages/ui/tui) |
 | `agent/post-step` | `serial` | [`packages/core/agent/src/types.ts:315`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`compact-basic`](../packages/compact/compact-basic), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy) |
 | `agent/pre-step` | `serial` | [`packages/core/agent/src/types.ts:246`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`time-context`](../packages/context/time-context), [`user-approval`](../packages/ui/user-approval) |
-| `agent/prompt-submit` | `waterfall` | [`packages/core/agent/src/types.ts:262`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`acp`](../packages/ui/acp), [`goal-session`](../packages/goal/goal-session), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`plan-mode`](../packages/plan/plan-mode), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) |
+| `agent/prompt-submit` | `waterfall` | [`packages/core/agent/src/types.ts:262`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`goal-session`](../packages/goal/goal-session), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`plan-mode`](../packages/plan/plan-mode), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) |
 | `agent/queued` | `emit` | [`packages/core/agent/src/types.ts:207`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`goal-session`](../packages/goal/goal-session), [`tui`](../packages/ui/tui) |
 | `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:276`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`agent`](../packages/core/agent) |
 | `agent/request-error` | `waterfall` | [`packages/core/agent/src/types.ts:330`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`compact-basic`](../packages/compact/compact-basic), [`llm-retry`](../packages/llm/llm-retry), [`plan-mode`](../packages/plan/plan-mode) |
@@ -24,8 +24,8 @@ This matrix shows which packages dispatch each harness-owned event and which pac
 | `agent/step-result` | `waterfall` | [`packages/core/agent/src/types.ts:303`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
 | `agent/turn-continuation` | `waterfall` | [`packages/core/agent/src/types.ts:341`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`plan-mode`](../packages/plan/plan-mode) |
 | `agent/turn-stop` | `serial` | [`packages/core/agent/src/types.ts:352`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`tool-goal`](../packages/goal/tool-goal) |
-| `approval/request` | `waterfall` | [`packages/ui/user-approval/src/index.ts:30`](../packages/ui/user-approval/src/index.ts) | [`user-approval`](../packages/ui/user-approval) (`waterfall`) | [`acp`](../packages/ui/acp) |
-| `commands/change` | `emit` | [`packages/ui/commands/src/index.ts:103`](../packages/ui/commands/src/index.ts) | [`commands`](../packages/ui/commands) (`events.dispatch`) | [`acp`](../packages/ui/acp), [`tui`](../packages/ui/tui) |
+| `approval/request` | `waterfall` | [`packages/ui/user-approval/src/index.ts:30`](../packages/ui/user-approval/src/index.ts) | [`user-approval`](../packages/ui/user-approval) (`waterfall`) | [`acp`](../packages/acp/acp) |
+| `commands/change` | `emit` | [`packages/ui/commands/src/index.ts:103`](../packages/ui/commands/src/index.ts) | [`commands`](../packages/ui/commands) (`events.dispatch`) | [`tui`](../packages/ui/tui) |
 | `fs/edit-intent` | `waterfall` | [`packages/fs/fs/src/index.ts:62`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`waterfall`) | [`fs-policy`](../packages/fs/fs-policy) |
 | `fs/observed` | `emit` | [`packages/fs/fs/src/index.ts:71`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`emit`) | [`fs-policy`](../packages/fs/fs-policy) |
 | `fs/write-intent` | `waterfall` | [`packages/fs/fs/src/index.ts:54`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`waterfall`) | [`fs-policy`](../packages/fs/fs-policy) |
@@ -33,7 +33,7 @@ This matrix shows which packages dispatch each harness-owned event and which pac
 | `llm/stream` | `waterfall` | [`packages/llm/llm/src/index.ts:52`](../packages/llm/llm/src/index.ts) | [`llm`](../packages/llm/llm) (`waterfall`) | [`agent-loop`](../packages/core/agent-loop), [`llm`](../packages/llm/llm), [`llm-replay`](../packages/support/llm-replay), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`session-title`](../packages/session-title/session-title) |
 | `session/created` | `emit` | [`packages/core/session/src/index.ts:79`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), [`llm-retry`](../packages/llm/llm-retry), `runtime`, [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`user-approval`](../packages/ui/user-approval) |
 | `session/disposed` | `emit` | [`packages/core/session/src/index.ts:89`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`agent-loop`](../packages/core/agent-loop), `runtime`, [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title) |
-| `session/event` | `emit` | [`packages/core/session/src/index.ts:101`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`acp`](../packages/ui/acp), [`cli-demo`](../packages/examples/cli-demo), [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), `runtime`, [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title), [`token-meter`](../packages/llm/token-meter), [`tui`](../packages/ui/tui), [`user-approval`](../packages/ui/user-approval), [`workspace-context`](../packages/context/workspace-context) |
+| `session/event` | `emit` | [`packages/core/session/src/index.ts:101`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`acp`](../packages/acp/acp), [`cli-demo`](../packages/examples/cli-demo), [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), `runtime`, [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title), [`token-meter`](../packages/llm/token-meter), [`tui`](../packages/ui/tui), [`user-approval`](../packages/ui/user-approval), [`workspace-context`](../packages/context/workspace-context) |
 | `session/flush` | `parallel` | [`packages/core/session/src/index.ts:111`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`session-persistence`](../packages/session-persistence/session-persistence) |
 | `subagent/end` | `emit` | [`packages/subagent/subagent/src/index.ts:139`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`jsonrpc`](../packages/ui/jsonrpc), [`subagent`](../packages/subagent/subagent) |
 | `subagent/provider-added` | `emit` | [`packages/subagent/subagent/src/index.ts:113`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`emit`) | [`subagent`](../packages/subagent/subagent), [`tool-subagent`](../packages/subagent/tool-subagent) |
diff --git a/docs/graph-atlas.md b/docs/graph-atlas.md
index 6050c4a60e..f4a62dac87 100644
--- a/docs/graph-atlas.md
+++ b/docs/graph-atlas.md
@@ -19,7 +19,6 @@ The process decision behind this index is recorded in [the documentation graph A
 | [event producer/consumer matrix](event-producer-consumer.md) | `hybrid generated` |
 | [agent turn and step lifecycle](agent-lifecycle.md) | `curated` |
 | [tool execution pipeline](tool-execution-pipeline.md) | `curated` |
-| [ACP snapshot replay](../packages/ui/acp/snapshot-replay.md) | `curated` |
 
 Regenerate with `pnpm run gen-doc-graphs`; verify freshness with `pnpm run verify-doc-graphs`.
 
diff --git a/docs/module-graph.md b/docs/module-graph.md
index 46a24b0683..a83a16f19c 100644
--- a/docs/module-graph.md
+++ b/docs/module-graph.md
@@ -120,8 +120,10 @@ flowchart TD
     pkg_llm_replay["llm-replay"]
     pkg_loader_smoke["loader-smoke"]
   end
-  subgraph group_ui["packages/ui"]
+  subgraph group_acp["packages/acp"]
     pkg_acp["acp"]
+  end
+  subgraph group_ui["packages/ui"]
     pkg_app_boot["app-boot"]
     pkg_commands["commands"]
     pkg_jsonrpc["jsonrpc"]
@@ -440,6 +442,10 @@ flowchart TD
   pkg_session_title_first_message_llm --> pkg_session
   pkg_session_title_first_message_llm --> pkg_session_title
   pkg_session_title_first_message_llm --> pkg_session_title_llm
+  pkg_acp --> pkg_agent
+  pkg_acp --> pkg_invariants
+  pkg_acp --> pkg_session
+  pkg_acp --> pkg_user_approval
   pkg_permission --> pkg_bash
   pkg_permission --> pkg_invariants
   pkg_permission --> pkg_sandbox
@@ -633,24 +639,6 @@ flowchart TD
   pkg_hooks_claude --> pkg_session_persistence
   pkg_hooks_claude --> pkg_subagent
   pkg_hooks_claude --> pkg_tools
-  pkg_acp --> pkg_agent
-  pkg_acp --> pkg_bash
-  pkg_acp --> pkg_commands
-  pkg_acp --> pkg_invariants
-  pkg_acp --> pkg_llm
-  pkg_acp --> pkg_llm_retry
-  pkg_acp --> pkg_permission
-  pkg_acp --> pkg_plan_mode
-  pkg_acp --> pkg_sandbox
-  pkg_acp --> pkg_session
-  pkg_acp --> pkg_session_persistence
-  pkg_acp --> pkg_session_query
-  pkg_acp --> pkg_session_reference
-  pkg_acp --> pkg_session_title
-  pkg_acp --> pkg_system_prompt
-  pkg_acp --> pkg_tools
-  pkg_acp --> pkg_user_approval
-  pkg_acp --> pkg_user_interaction
   pkg_jsonrpc --> pkg_agent
   pkg_jsonrpc --> pkg_invariants
   pkg_jsonrpc --> pkg_llm
@@ -720,16 +708,10 @@ flowchart TD
   pkg_acp_demo --> pkg_acp
   pkg_acp_demo --> pkg_agent_spine_demo
   pkg_acp_demo --> pkg_app_boot
-  pkg_acp_demo --> pkg_command_goal
-  pkg_acp_demo --> pkg_commands
   pkg_acp_demo --> pkg_invariants
   pkg_acp_demo --> pkg_session_checkpoint_policy
   pkg_acp_demo --> pkg_session_persistence_jsonl
-  pkg_acp_demo --> pkg_session_query
-  pkg_acp_demo --> pkg_session_query_sqlite
-  pkg_acp_demo --> pkg_session_reference
   pkg_acp_demo --> pkg_tools
-  pkg_acp_demo --> pkg_user_interaction
   pkg_acp_demo --> pkg_workspace_context
   pkg_cli_demo --> pkg_agent
   pkg_cli_demo --> pkg_agent_spine_demo
@@ -850,6 +832,7 @@ flowchart TD
 | [`session-query-sqlite`](../packages/session-query/session-query-sqlite) | `session-query` | [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-query`](../packages/session-query/session-query) |
 | [`session-title-all-messages-llm`](../packages/session-title/session-title-all-messages-llm) | `session-title` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`session-title-llm`](../packages/session-title/session-title-llm) |
 | [`session-title-first-message-llm`](../packages/session-title/session-title-first-message-llm) | `session-title` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`session-title-llm`](../packages/session-title/session-title-llm) |
+| [`acp`](../packages/acp/acp) | `acp` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`user-approval`](../packages/ui/user-approval) |
 | [`permission`](../packages/ui/permission) | `ui` | [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`session`](../packages/core/session), [`user-approval`](../packages/ui/user-approval) |
 | [`session-reference`](../packages/context/session-reference) | `context` | [`agent`](../packages/core/agent), [`compact`](../packages/compact/compact), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`retention`](../packages/util/retention), [`session`](../packages/core/session), [`session-query`](../packages/session-query/session-query) |
 | [`pty-local`](../packages/pty/pty-local) | `pty` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`pty`](../packages/pty/pty), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`session`](../packages/core/session) |
@@ -881,7 +864,6 @@ flowchart TD
 | [`subagent-inprocess`](../packages/subagent/subagent-inprocess) | `subagent` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools) |
 | [`tool-subagent`](../packages/subagent/tool-subagent) | `subagent` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`subagent`](../packages/subagent/subagent), [`tasks`](../packages/tasks/tasks), [`tools`](../packages/core/tools) |
 | [`hooks-claude`](../packages/hooks/hooks-claude) | `hooks` | [`agent`](../packages/core/agent), [`hook-protocol`](../packages/hooks/hook-protocol), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`subagent`](../packages/subagent/subagent), [`tools`](../packages/core/tools) |
-| [`acp`](../packages/ui/acp) | `ui` | [`agent`](../packages/core/agent), [`bash`](../packages/bash/bash), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`permission`](../packages/ui/permission), [`plan-mode`](../packages/plan/plan-mode), [`sandbox`](../packages/sandbox/sandbox), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-query`](../packages/session-query/session-query), [`session-reference`](../packages/context/session-reference), [`session-title`](../packages/session-title/session-title), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/ui/user-approval), [`user-interaction`](../packages/ui/user-interaction) |
 | [`jsonrpc`](../packages/ui/jsonrpc) | `ui` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-deepseek`](../packages/llm/llm-deepseek), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent) |
 | [`tui`](../packages/ui/tui) | `ui` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-reference`](../packages/context/session-reference), [`session-title`](../packages/session-title/session-title), [`skill`](../packages/skill/skill), [`system-prompt`](../packages/core/system-prompt), [`token-meter`](../packages/llm/token-meter), [`tools`](../packages/core/tools), [`user-interaction`](../packages/ui/user-interaction) |
 | [`agent-spine-demo`](../packages/examples/agent-spine-demo) | `examples` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`paths`](../packages/util/paths), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`skill`](../packages/skill/skill), [`skill-local`](../packages/skill/skill-local), [`system-prompt`](../packages/core/system-prompt), [`tasks`](../packages/tasks/tasks), [`tool-bash`](../packages/bash/tool-bash), [`tool-goal`](../packages/goal/tool-goal), [`tool-skill`](../packages/skill/tool-skill), [`tool-tasks`](../packages/tasks/tool-tasks), [`tools`](../packages/core/tools), [`workspace-context`](../packages/context/workspace-context) |
@@ -889,6 +871,6 @@ flowchart TD
 | [`workflow-workerthread`](../packages/workflow/workflow-workerthread) | `workflow` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`subagent-fork`](../packages/subagent/subagent-fork) | `subagent` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |
 | [`subagent-spawn`](../packages/subagent/subagent-spawn) | `subagent` | [`invariants`](../packages/support/invariants), [`subagent`](../packages/subagent/subagent), [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |
-| [`acp-demo`](../packages/examples/acp-demo) | `examples` | [`acp`](../packages/ui/acp), [`agent-spine-demo`](../packages/examples/agent-spine-demo), [`app-boot`](../packages/ui/app-boot), [`command-goal`](../packages/goal/command-goal), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite), [`session-reference`](../packages/context/session-reference), [`tools`](../packages/core/tools), [`user-interaction`](../packages/ui/user-interaction), [`workspace-context`](../packages/context/workspace-context) |
+| [`acp-demo`](../packages/examples/acp-demo) | `examples` | [`acp`](../packages/acp/acp), [`agent-spine-demo`](../packages/examples/agent-spine-demo), [`app-boot`](../packages/ui/app-boot), [`invariants`](../packages/support/invariants), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`tools`](../packages/core/tools), [`workspace-context`](../packages/context/workspace-context) |
 | [`cli-demo`](../packages/examples/cli-demo) | `examples` | [`agent`](../packages/core/agent), [`agent-spine-demo`](../packages/examples/agent-spine-demo), [`app-boot`](../packages/ui/app-boot), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`tools`](../packages/core/tools), [`workspace-context`](../packages/context/workspace-context) |
 | [`tui-demo`](../packages/examples/tui-demo) | `examples` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`agent-spine-demo`](../packages/examples/agent-spine-demo), [`app-boot`](../packages/ui/app-boot), [`command-goal`](../packages/goal/command-goal), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite), [`session-reference`](../packages/context/session-reference), [`tool-ask-user`](../packages/ui/tool-ask-user), [`tools`](../packages/core/tools), [`tui`](../packages/ui/tui), [`user-interaction`](../packages/ui/user-interaction), [`workspace-context`](../packages/context/workspace-context) |
diff --git a/docs/persistence-catalog.md b/docs/persistence-catalog.md
index 8c1d815bc0..271c245143 100644
--- a/docs/persistence-catalog.md
+++ b/docs/persistence-catalog.md
@@ -79,7 +79,7 @@ export type SessionEvent<T extends SessionEventType = SessionEventType> = {
 }[T]
 ```
 
-Sources: [`packages/core/session/src/types.ts:317`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:330`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:360`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:392`](../packages/core/session/src/types.ts)
+Sources: [`packages/core/session/src/types.ts:316`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:329`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:359`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:391`](../packages/core/session/src/types.ts)
 
 ## Events
 
@@ -151,7 +151,7 @@ Source: [`packages/ui/user-approval/src/index.ts:67`](../packages/ui/user-approv
 
 Types: [StreamChunk](core-data-structures/llm-streaming.md)
 
-Source: [`packages/core/session/src/types.ts:263`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:262`](../packages/core/session/src/types.ts)
 
 #### `assistant/message` — surface
 
@@ -167,7 +167,7 @@ Source: [`packages/core/session/src/types.ts:263`](../packages/core/session/src/
 
 Types: [ContentBlock](core-data-structures/core.md) · [TokenUsage](core-data-structures/llm-streaming.md)
 
-Source: [`packages/core/session/src/types.ts:270`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:269`](../packages/core/session/src/types.ts)
 
 ### `compact/*`
 
@@ -246,7 +246,7 @@ Source: [`packages/compact/compact/src/types.ts:22`](../packages/compact/compact
 
 Types: [ContentBlock](core-data-structures/core.md) · [MessageSource](core-data-structures/core.md)
 
-Source: [`packages/core/session/src/types.ts:257`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:256`](../packages/core/session/src/types.ts)
 
 ### `hook/*`
 
@@ -357,7 +357,7 @@ Source: [`packages/plan/plan-mode/src/index.ts:41`](../packages/plan/plan-mode/s
 
 Types: [ContentBlock](core-data-structures/core.md) · [MessageSource](core-data-structures/core.md)
 
-Source: [`packages/core/session/src/types.ts:245`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:244`](../packages/core/session/src/types.ts)
 
 ### `request/*`
 
@@ -371,7 +371,7 @@ Source: [`packages/core/session/src/types.ts:245`](../packages/core/session/src/
 'request/header': { header: EpochHeader; reason: RequestHeaderReason }
 ```
 
-Source: [`packages/core/session/src/types.ts:305`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:304`](../packages/core/session/src/types.ts)
 
 ### `sandbox/*`
 
@@ -427,7 +427,7 @@ Source: [`packages/session-title/session-title-llm/src/index.ts:44`](../packages
 'steering/message': PromptMessageData & { turn: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:298`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:297`](../packages/core/session/src/types.ts)
 
 ### `step/*`
 
@@ -438,7 +438,7 @@ Source: [`packages/core/session/src/types.ts:298`](../packages/core/session/src/
 'step/end': { turn: number; step: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:238`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:237`](../packages/core/session/src/types.ts)
 
 #### `step/start` — log-only
 
@@ -447,7 +447,7 @@ Source: [`packages/core/session/src/types.ts:238`](../packages/core/session/src/
 'step/start': { turn: number; step: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:236`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:235`](../packages/core/session/src/types.ts)
 
 ### `todo/*`
 
@@ -460,7 +460,7 @@ Source: [`packages/core/session/src/types.ts:236`](../packages/core/session/src/
 
 Types: [TodoItem](core-data-structures/session.md)
 
-Source: [`packages/core/session/src/types.ts:300`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:299`](../packages/core/session/src/types.ts)
 
 ### `tool/*`
 
@@ -477,7 +477,7 @@ Source: [`packages/core/session/src/types.ts:300`](../packages/core/session/src/
 
 Types: [CallId](core-data-structures/core.md)
 
-Source: [`packages/core/session/src/types.ts:276`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:275`](../packages/core/session/src/types.ts)
 
 #### `tool/code-dispatch` — log-only
 
@@ -531,7 +531,7 @@ Source: [`packages/core/tools/src/code-mode.ts:34`](../packages/core/tools/src/c
 
 Types: [CallId](core-data-structures/core.md) · [ContentBlock](core-data-structures/core.md)
 
-Source: [`packages/core/session/src/types.ts:288`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:287`](../packages/core/session/src/types.ts)
 
 ### `turn/*`
 
@@ -549,7 +549,7 @@ Source: [`packages/core/session/src/types.ts:288`](../packages/core/session/src/
 
 Types: [TurnEndReason](core-data-structures/session.md)
 
-Source: [`packages/core/session/src/types.ts:234`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:233`](../packages/core/session/src/types.ts)
 
 #### `turn/start` — log-only
 
@@ -565,7 +565,7 @@ Source: [`packages/core/session/src/types.ts:234`](../packages/core/session/src/
 
 Types: [TurnTrigger](core-data-structures/session.md)
 
-Source: [`packages/core/session/src/types.ts:227`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:226`](../packages/core/session/src/types.ts)
 
 ### `user/*`
 
@@ -576,4 +576,4 @@ Source: [`packages/core/session/src/types.ts:227`](../packages/core/session/src/
 'user/message': PromptMessageData
 ```
 
-Source: [`packages/core/session/src/types.ts:240`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:239`](../packages/core/session/src/types.ts)
diff --git a/docs/postmortem/0001-acp-default-export-drops-inject.md b/docs/postmortem/0001-acp-default-export-drops-inject.md
index 10e88c390c..4ac0b19fa9 100644
--- a/docs/postmortem/0001-acp-default-export-drops-inject.md
+++ b/docs/postmortem/0001-acp-default-export-drops-inject.md
@@ -24,7 +24,7 @@ The ACP server could not create or load a single session — the two RPCs an edi
 
 ## Root cause #1 — `export default apply` drops the plugin's `inject` (broke `session/new`)
 
-`packages/ui/acp/src/index.ts` is a *namespace plugin*: it exports `name`, `inject`, `Config`, and `apply` as separate named exports — the same shape as every other plugin in the repo (`invariants`, `llm-deepseek`, `tool-bash`, `tui`, …). But it *also* ended with one extra line no other plugin had:
+`packages/acp/acp/src/index.ts` is a *namespace plugin*: it exports `name`, `inject`, `Config`, and `apply` as separate named exports — the same shape as every other plugin in the repo (`invariants`, `llm-deepseek`, `tool-bash`, `tui`, …). But it *also* ended with one extra line no other plugin had:
 
 ```ts ignore-check
 export const name = 'acp'
@@ -97,7 +97,7 @@ Both bugs share one root process gap: **no test exercised the plugin through its
 
 ## Guardrails added
 
-- **Removed `export default apply`** (`packages/ui/acp/src/index.ts`) — the Bug #1 fix.
+- **Removed `export default apply`** (`packages/acp/acp/src/index.ts`) — the Bug #1 fix.
 - **`AgentLoop.resume` reads `this.ctx.get('sessionPersistence')`** (`packages/core/agent-loop/src/index.ts`) — the Bug #2 fix, with a comment explaining the shadow-walk trap.
 - **No-key `session/new` e2e over real stdio** (`examples/acp-agent/tests/acp.e2e.ts`): boots the example as a subprocess through the real Loader and asserts `session/new` resolves. This fails loudly on Bug #1 with no API key. Verified it fails when `export default apply` is restored.
 - **`TSX_TSCONFIG_PATH` in the e2e spawn**: the subprocess runs from a temp cwd, where tsx cannot find the repo-root tsconfig `paths` map by searching upward — so dsh-* imports silently fell back to built `lib/`. Pointing tsx at the repo tsconfig makes resolution cwd-independent and ensures the test runs *source*, not a possibly-stale build.
diff --git a/docs/testing.md b/docs/testing.md
index 85798cee3e..3ee74aa5f7 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -7,7 +7,7 @@ How this repo tests, tier by tier, and the rules that keep a green suite meaning
 - **Unit** (`pnpm run test`): vitest over `packages|examples/*/tests/**/*.spec.ts`, colocated with what they test. Every registry gets an HMR-safety test (dispose the contributing fiber, assert cleanup). Prefer edge cases, error paths, event ordering, concurrency races, and permanent contract regressions (see `packages/core/agent-loop/tests/contract-regressions.spec.ts`).
 - **Coverage gate** (`pnpm run test:coverage`): the gating run, per-file 100% on `packages/*/*/src`. An uncovered line is often dead code the gate is correctly flagging for deletion, not a missing test to bolt on. Line coverage is necessary, never sufficient — it proves lines ran, not that the feature works as shipped.
 - **Real-API e2e** (`pnpm run test:e2e`): with-key tests against live provider APIs — the DeepSeek model plus provider-specific smokes that gate on their own keys (`EXA_API_KEY`, `PERPLEXITY_API_KEY`, …); each suite self-skips without its key so keyless CI stays green ([real-API e2e Agent Note](../.agents/notes/implemented/testing/2026-06-19-real-api-e2e-ci.md)).
-- **Snapshot** (`pnpm run test:snapshot`): transport-specific keyless expected outputs cover external presentation. ACP suites boot the real example subprocess, replay a recorded session, and diff normalized JSON-RPC plus the re-persisted log ([ACP snapshot Agent Note](../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)); the headless suite independently pins `stream-json` through its real one-shot subprocess. TUI completed journeys replay recorded primary/child JSONL through the real agent loop and tools before projecting ANSI into semantic terminal-state expected outputs; package-local snapshots retain transient renderer states, and a real PTY conversation covers the process boundary ([TUI snapshot Agent Note](../.agents/notes/implemented/testing/2026-07-18-tui-terminal-state-snapshots.md)). Use `pnpm run test:snapshot:record` when a model transcript must change and `pnpm run test:snapshot:refresh` when committed replay input remains correct; review every JSONL and expected-output diff. System-prompt/tool-schema content is pinned by one ACP scenario (`text-turn`) and tokenized in every other fixture, so a prompt or schema edit churns one committed line ([pinned-header Agent Note](../.agents/notes/implemented/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)).
+- **Snapshot** (`pnpm run test:snapshot`): transport-specific keyless expected outputs cover protocol or presentation behavior, while persisted logs pin assembled backend behavior. ACP suites boot the real automation server subprocess, replay a recorded session, and diff normalized JSON-RPC plus the re-persisted log ([ACP snapshot Agent Note](../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)); the headless suite independently pins `stream-json` through its real one-shot subprocess. TUI completed journeys replay recorded primary/child JSONL through the real agent loop and tools before projecting ANSI into semantic terminal-state expected outputs; package-local snapshots retain transient renderer states, and a real PTY conversation covers the process boundary ([TUI snapshot Agent Note](../.agents/notes/implemented/testing/2026-07-18-tui-terminal-state-snapshots.md)). Use `pnpm run test:snapshot:record` when a model transcript must change and `pnpm run test:snapshot:refresh` when committed replay input remains correct; review every JSONL and expected-output diff. System-prompt/tool-schema content is pinned by one ACP scenario (`text-turn`) and tokenized in every other fixture, so a prompt or schema edit churns one committed line ([pinned-header Agent Note](../.agents/notes/implemented/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)).
 
 ## The with-key policy: inference is cheap here
 
@@ -41,4 +41,4 @@ An e2e assertion re-runs the command or re-reads the file externally; a keyword
 
 ## When a snapshot test is required
 
-Every non-trivial model- or human-visible change adds or updates a keyless scenario in the same PR through a runnable example's owning snapshot suite. Package tests, e2e assertions, mock/test-only compositions, and PR rationale do not replace the assembled transcript; extend the harness when needed. ACP surfaces use `examples/<name>/tests/snapshots/`, a scenario table over the [`dsh-acp-snapshot`](../packages/support/acp-snapshot/README.md) suite factory (`examples/acp-agent` is primary); `examples/headless-agent` owns the `stream-json` snapshot and replay fixtures. Completed interactive-terminal journeys use JSONL-driven scenarios under `examples/tui-agent/tests/snapshots/`; transient presentation uses the package-local semantic matrix, with a PTY case when input, Loader selection, or terminal teardown changes. New capability seams, lifecycle shapes, or transcript surfaces name every coverage tier at plan time and verify the harness can express it before implementation.
+Every non-trivial model-, protocol-, or human-visible change adds or updates a keyless scenario in the same PR through a runnable example's owning snapshot suite. Package tests, e2e assertions, mock/test-only compositions, and PR rationale do not replace the assembled transcript; extend the harness when needed. ACP automation scenarios use `examples/<name>/tests/snapshots/`, a scenario table over the [`dsh-acp-snapshot`](../packages/support/acp-snapshot/README.md) suite factory (`examples/acp-agent` is primary); `examples/headless-agent` owns the `stream-json` snapshot and replay fixtures. Completed interactive-terminal journeys use JSONL-driven scenarios under `examples/tui-agent/tests/snapshots/`; transient presentation uses the package-local semantic matrix, with a PTY case when input, Loader selection, or terminal teardown changes. New capability seams, lifecycle shapes, or transcript surfaces name every coverage tier at plan time and verify the harness can express it before implementation.
diff --git a/docs/tool-catalog.md b/docs/tool-catalog.md
index 4f9de3644f..31493658d0 100644
--- a/docs/tool-catalog.md
+++ b/docs/tool-catalog.md
@@ -29,7 +29,7 @@ This table connects model-visible tool names to the plugin package and service s
 | `@deepseek-ai/dsh-tool-skill` | `skill` | `ctx.tools`, `ctx.skills` | `tool/call`, `tool/result` | - | - |
 | `@deepseek-ai/dsh-tool-subagent` | `subagent` | `ctx.tools`, `ctx.subagents` | `tool/call`, `tool/result`, `child session events through the chosen provider` | `subagent`, `subagent_fork` | The registered tool name is the load-time `toolName` config (default `subagent`); the schema above is that default. The shipped example agents load this package once per subagent backend, so the model additionally sees `subagent_fork` (bound to the fork backend) with an identical schema — see `examples/tui-agent/cordis.yml` and `examples/acp-agent/cordis.yml`. |
 | `@deepseek-ai/dsh-tool-tasks` | `task_kill`, `task_list`, `task_output` | `ctx.tools`, `ctx.tasks`, `ctx.systemPrompt` | `tool/call`, `tool/result`, `context/message via agent.inject() for background completion notices` | - | The kind-agnostic background-task control surface: background bash commands, PTY sends, and subagents are read, listed, and killed through the same three tools. Loading the plugin attaches the control surface that arms producers' `ctx.tasks.start()`. |
-| `@deepseek-ai/dsh-tool-todo` | `todo_write` | `ctx.tools`, `owning Agent session` | `tool/call`, `todo/write`, `tool/result` | - | todo_write is session-owned state; UIs render the latest todo/write event as a checklist or ACP plan. |
+| `@deepseek-ai/dsh-tool-todo` | `todo_write` | `ctx.tools`, `owning Agent session` | `tool/call`, `todo/write`, `tool/result` | - | todo_write is session-owned state; UIs render the latest todo/write event as a checklist. |
 | `@deepseek-ai/dsh-tool-workflow` | `workflow` | `ctx.tools`, `ctx.workflows`, `ctx.systemPrompt`, `a calling Agent (exec.agent parents the script children)` | `tool/call`, `tool/result` | - | - |
 | `@deepseek-ai/dsh-tool-web` | `web_fetch`, `web_search` | `ctx.tools`, `ctx.web`, `ctx.systemPrompt` | `tool/call`, `tool/result` | - | web_search and web_fetch keep provider selection behind ctx.web so model-visible schemas stay stable across backend swaps. |
 
@@ -929,7 +929,7 @@ Record and update a structured task list for the current work. Send the ENTIRE l
 
 Source: [`packages/todo/tool-todo/src/index.ts`](../packages/todo/tool-todo/src/index.ts)
 
-todo_write is session-owned state; UIs render the latest todo/write event as a checklist or ACP plan.
+todo_write is session-owned state; UIs render the latest todo/write event as a checklist.
 
 ## `@deepseek-ai/dsh-tool-workflow`
 
diff --git a/docs/user/develop/basic/tool.i18n.yaml b/docs/user/develop/basic/tool.i18n.yaml
index 73970f99d8..697c88e98f 100644
--- a/docs/user/develop/basic/tool.i18n.yaml
+++ b/docs/user/develop/basic/tool.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-tool.md: 7b211cfef54306f7c316dc08da1df759dcbf1b06
-tool.zh.md: 214b35b28de0c647737bc8297b13b4997947b52e
+tool.md: 0d7cbc3f0b86f88fb67aeff6aa61181dff2912ee
+tool.zh.md: 30cc871d7b417bdf7f33025b22e3f0965e2b8805
diff --git a/docs/user/develop/basic/tool.md b/docs/user/develop/basic/tool.md
index 7b211cfef5..0d7cbc3f0b 100644
--- a/docs/user/develop/basic/tool.md
+++ b/docs/user/develop/basic/tool.md
@@ -158,7 +158,7 @@ Do not repeat type validation inside `execute`.
 
 ## Presentation
 
-A tool can define UI presentation methods for terminal and ACP clients:
+A tool can define transport-neutral presentation methods for terminal and web clients:
 
 ```ts ignore-check
 defineTool({
diff --git a/docs/user/develop/basic/tool.zh.md b/docs/user/develop/basic/tool.zh.md
index 214b35b28d..30cc871d7b 100644
--- a/docs/user/develop/basic/tool.zh.md
+++ b/docs/user/develop/basic/tool.zh.md
@@ -158,7 +158,7 @@ async execute(args) {
 
 ## 展示层 (Presentation)
 
-Tool 可以定义 UI 渲染方法，用于在终端或 ACP 客户端中展示 tool call 和 result：
+Tool 可以定义与传输方式无关的展示方法，供终端和 Web 客户端使用：
 
 ```ts ignore-check
 defineTool({
diff --git a/docs/user/guide/config.i18n.yaml b/docs/user/guide/config.i18n.yaml
index cf2658bf4d..695584a6e6 100644
--- a/docs/user/guide/config.i18n.yaml
+++ b/docs/user/guide/config.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-config.md: 8958729d04224215ca420c3103d253a8a5783405
-config.zh.md: 530f2b335453d5064acdac28a60d7df51cd915f0
+config.md: a884cb9c2ec31bd4b12a31cce6290df1d134cf9a
+config.zh.md: 3fb9ce69e5f7cb6b92f055ef18595e5ff07d9bbf
diff --git a/docs/user/guide/config.md b/docs/user/guide/config.md
index 8958729d04..a884cb9c2e 100644
--- a/docs/user/guide/config.md
+++ b/docs/user/guide/config.md
@@ -10,7 +10,7 @@ The repository examples are runnable configurations and the most reliable starti
 
 - [tui-agent](../../../examples/tui-agent/cordis.yml) combines the DeepSeek model, Bash, filesystem, compaction, subagents, workflows, and the interactive TUI.
 - [headless-agent](../../../examples/headless-agent/cordis.yml) exposes the coding composition as a one-shot task.
-- [acp-agent](../../../examples/acp-agent/cordis.yml) connects to editor clients over ACP.
+- [acp-agent](../../../examples/acp-agent/cordis.yml) exposes fresh sessions to programmatic ACP clients.
 
 A minimal configuration is a list of plugin entries:
 
diff --git a/docs/user/guide/config.zh.md b/docs/user/guide/config.zh.md
index 530f2b3354..3fb9ce69e5 100644
--- a/docs/user/guide/config.zh.md
+++ b/docs/user/guide/config.zh.md
@@ -10,7 +10,7 @@ Harness 使用 `cordis.yml` 描述 Agent 加载哪些插件以及每个插件的
 
 - [tui-agent](../../../examples/tui-agent/cordis.yml) 组合 DeepSeek 模型、Bash、文件系统、压缩、子代理、工作流和交互式 TUI。
 - [headless-agent](../../../examples/headless-agent/cordis.yml) 以单次任务形式暴露 coding 组装。
-- [acp-agent](../../../examples/acp-agent/cordis.yml) 通过 ACP 接入编辑器客户端。
+- [acp-agent](../../../examples/acp-agent/cordis.yml) 向程序化 ACP（Agent Client Protocol）客户端提供全新会话。
 
 最小配置由一组插件条目组成：
 
diff --git a/examples/README.md b/examples/README.md
index b895259965..8630f235b4 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -26,8 +26,8 @@ Run with: `pnpm run demo:cordis` (needs `DEEPSEEK_API_KEY`). See [cordis-agent/R
 
 ## acp-agent
 
-An agent demo exposed as an **Agent Client Protocol (ACP)** server over JSON-RPC stdio, via the [`@deepseek-ai/dsh-acp-demo`](../packages/examples/acp-demo) app — drive it from Zed or any other ACP client. It owns the ACP keyless snapshot suite.
+An agent exposed as an **Agent Client Protocol (ACP)** automation server over JSON-RPC stdio, via [`@deepseek-ai/dsh-acp-demo`](../packages/examples/acp-demo). Programmatic clients create fresh sessions, send text prompts, consume committed assistant text, answer one-shot permission requests, and cancel work. It owns the ACP keyless snapshot suite.
 
-Run with: `pnpm run demo:acp` (needs `DEEPSEEK_API_KEY`); `pnpm run demo:code-mode acp` boots the same server in Code Mode via the `code-mode.cordis.yml` overlay. See [acp-agent/README.md](acp-agent/README.md) for the Zed setup and the snapshot-test design.
+Run with: `pnpm run demo:acp` (needs `DEEPSEEK_API_KEY`); `pnpm run demo:code-mode acp` boots the same server in Code Mode via the `code-mode.cordis.yml` overlay. See [acp-agent/README.md](acp-agent/README.md) for the protocol and snapshot-test contracts.
 
-The default `cordis.yml` composes [`@deepseek-ai/dsh-plan-mode`](../packages/plan/plan-mode), [`@deepseek-ai/dsh-sandbox-local`](../packages/sandbox/sandbox-local), [`@deepseek-ai/dsh-bash-sandbox`](../packages/bash/bash-sandbox), [`@deepseek-ai/dsh-user-approval`](../packages/ui/user-approval), and [`@deepseek-ai/dsh-permission`](../packages/ui/permission). A capable client gets a `default` / `plan` mode picker plus one independent `Permissions` select: plan adds model guidance and the reviewed `exit_plan_mode` crossing without changing enforcement, while `workspace-write` confines bash to the configured workspace and asks before a wider retry. See [acp-agent/README.md](acp-agent/README.md#plan-mode) for the plan-review and elicitation flow.
+The default `cordis.yml` composes [`@deepseek-ai/dsh-sandbox-local`](../packages/sandbox/sandbox-local), [`@deepseek-ai/dsh-bash-sandbox`](../packages/bash/bash-sandbox), and [`@deepseek-ai/dsh-user-approval`](../packages/ui/user-approval). `workspace-write` confines bash and filesystem mutations to each session workspace; a wider retry becomes a one-shot machine permission request over ACP.
diff --git a/examples/acp-agent/README.md b/examples/acp-agent/README.md
index d803da3d0e..0e4b694d14 100644
--- a/examples/acp-agent/README.md
+++ b/examples/acp-agent/README.md
@@ -1,56 +1,35 @@
 # acp-agent example
 
-The DeepSeek Harness SDK agent demo exposed as an **Agent Client Protocol (ACP)** server over JSON-RPC stdio — drive it from Zed or any other ACP client.
+Automation-oriented [Agent Client Protocol](https://agentclientprotocol.com) server over JSON-RPC stdio. It is intended for parent agents, subagent providers, and other programmatic clients, not as the product UI.
 
 ```sh
-pnpm run demo:acp          # needs DEEPSEEK_API_KEY (repo-root .env or env)
-pnpm run demo:code-mode acp   # the same server in Code Mode: one wire tool, run_code
+pnpm run demo:acp             # needs DEEPSEEK_API_KEY (repo-root .env or env)
+pnpm run demo:code-mode acp   # same protocol with the Code Mode tool transport
 ```
 
-The leaf config loads the ACP app, DeepSeek adapter, plan mode, sandboxed bash, the sandboxed filesystem stack, approval and permission services, model-facing tools, and repeat guard. The app bundles the agent spine, JSONL persistence, and bridge, creates agents on `session/new`, and keeps stdout logger-free. [`fs.cordis.yml`](fs.cordis.yml) adds local tool-result spill storage for its dedicated scenarios; [`code-mode.cordis.yml`](code-mode.cordis.yml) adds `run_code` and its generated TypeScript SDK. See [Code Mode](../../packages/core/tools/README.md#code-mode).
+The leaf loads the ACP app, DeepSeek adapter, sandboxed bash and filesystem stacks, one-shot approval policy, compaction, subagents, workflows, hooks, model-facing tools, and repeat guard. The app creates one fresh agent per `session/new`, persists sessions to JSONL, and keeps stdout protocol-pure. [`fs.cordis.yml`](fs.cordis.yml) adds local tool-result spill storage for dedicated scenarios; [`code-mode.cordis.yml`](code-mode.cordis.yml) adds `run_code` and its generated TypeScript SDK.
 
-## stdout is the protocol
+## Protocol channel
 
-This example loads **no stdout logger** — `stdout` carries the JSON-RPC frames, and any other write corrupts them. `@deepseek-ai/dsh-acp-demo` includes no logger entry, so this leaf has none to get wrong by default; do not add one (use a stderr exporter if you need logs).
+Stdout carries only newline-delimited ACP JSON-RPC. `@deepseek-ai/dsh-acp-demo` installs no stdout logger; leaf additions must use stderr for diagnostics.
 
-## Zed configuration
+The server accepts initialization/authentication, fresh text sessions, one in-flight prompt per session, cancellation, and one-shot permission decisions. It emits only committed assistant text. Session navigation, commands, modes, configuration pickers, elicitation, titles, plans, reasoning, tool cards, and terminal output are intentionally absent; the full contract lives in [`@deepseek-ai/dsh-acp`](../../packages/acp/acp/README.md).
 
-Add to your Zed `settings.json` under `agent_servers`:
+## Session workspaces and permissions
 
-```json
-{
-  "agent_servers": {
-    "DeepSeek Harness": {
-      "command": "pnpm",
-      "args": ["--dir", "/path/to/deepseek-harness", "run", "demo:acp"],
-      "env": { "DEEPSEEK_API_KEY": "sk-…" }
-    }
-  }
-}
-```
+Each `session/new` supplies an absolute `cwd`. Sandboxed bash and filesystem mutations resolve `workspace-write` against that session cwd, so concurrent sessions can use separate project roots; platform temporary roots remain shared writable scratch space ([sandbox contract](../../packages/sandbox/sandbox/README.md)). `DSH_PERMISSION_MODE` selects `workspace-write` or `danger-full-access` for deployment and tests.
 
-The editor sets each session's `cwd` to the project it opens. That directory is both bash's default workdir and the session's primary `workspace-write` boundary: every bash or filesystem mutation carries one policy resolved from the calling session, so a single server process may serve concurrent projects. Projects outside the platform temporary areas do not grant either session writes into the other; `/tmp` and `os.tmpdir()` remain shared writable scratch roots under `workspace-write`, so projects placed there are not mutually isolated ([writable-root contract](../../packages/sandbox/sandbox/README.md)). The configured `workspaceRoot: process.cwd()` remains the fallback for calls without a session cwd. The filesystem tools ride the same policy through [`@deepseek-ai/dsh-fs-sandbox`](../../packages/fs/fs-sandbox/), so `read`/`write`/`edit` are available under every mode and confined to the same policy.
+Under `workspace-write`, a model retry requesting wider sandbox access triggers `session/request_permission` with `allow_once` and `reject_once`. The client decides programmatically; dismissal or an unavailable answer fails closed. The selected outcome applies only to that retry and is recorded through the normal tool-result/audit path. The server never exposes a permission picker or persists client policy.
 
-## Plan mode
+## Snapshot tests
 
-The same `demo:acp` server composes [`@deepseek-ai/dsh-plan-mode`](../../packages/plan/plan-mode/), so a capable client advertises `default` and `plan` in its mode picker. ACP owns those protocol ids and projects them onto the plugin's boolean plan state. This composition owns the complete plan instructions in [`cordis.yml`](cordis.yml): remain in plan mode, inspect before asking, avoid mutations, resolve discoverable repository facts, and submit a decision-complete plan through `exit_plan_mode`. Those are the instrumental behaviors shared by the local Codex and Claude Code references; product-specific plan files, phase machinery, and protocol tags stay out of the plugin contract.
+This example owns the ACP snapshot suite. It boots the real automation server, replays committed model streams through `dsh-llm-replay`, and compares both normalized protocol output and re-persisted session logs. Recording uses the real model; refresh reuses committed replay input. Overrides cover throw/hang behavior, and optional `workspace/` fixtures seed world-state checks.
 
-Plan mode adds only that configured guidance section. Every tool, including `exit_plan_mode`, keeps the same schema while plan mode is inactive or active; the exit tool describes itself as plan-only and rejects if called while inactive. Stable native schemas and Code Mode SDK bindings avoid tool-catalog churn at the transition. `ask_user_question` carries blocking user-owned choices through ACP elicitation, while `exit_plan_mode` renders the exact logged plan for approval and returns keep-planning feedback to the model. The mode picker and permission select remain independent: switching plan state never changes sandbox or approval state, and deployments that need a hard read-only planning floor configure that policy separately. The [plan-mode Agent Note](../../.agents/notes/implemented/feature/2026-07-07-plan-mode.md) owns the state and review contract.
+Most scenarios pin backend behavior rather than ACP-specific behavior and remain in this suite until they can move without losing coverage. The FIXME in [`tests/acp.snapshot.ts`](tests/acp.snapshot.ts) names their migration to the headless `stream-json` suite.
 
-## Snapshot tests (record-once / replay-deterministic)
+## Protocol limitations
 
-This example hosts the ACP snapshot suite, including the picker advertisement and both plan-review branches. It replays through `dsh-llm-replay`, which reconstructs model streams from `assistant/chunk` events in each scenario's session JSONL. Recording runs the real ACP agent and harvests its logs; refresh keeps the committed transcript as mock input and rewrites current replay outputs. `replay.override.json` covers throw and hang cases that chunks cannot express, and an optional `workspace/` seeds files. The [snapshot Agent Note](../../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md) owns the ACP harness design.
-
-## Permissions and sandboxing
-
-The default tree composes [`@deepseek-ai/dsh-sandbox-local`](../../packages/sandbox/sandbox-local/), [`@deepseek-ai/dsh-sandbox-policy`](../../packages/sandbox/sandbox-policy/), [`@deepseek-ai/dsh-bash-sandbox`](../../packages/bash/bash-sandbox/), [`@deepseek-ai/dsh-fs-sandbox`](../../packages/fs/fs-sandbox/), [`@deepseek-ai/dsh-user-approval`](../../packages/ui/user-approval/), and [`@deepseek-ai/dsh-permission`](../../packages/ui/permission/). Bash and the `read`/`write`/`edit` tools start in `workspace-write`; a denied operation returns a structured marker, and a retry with `sandbox_permissions` plus `justification` becomes a one-shot `session/request_permission` prompt in the editor. "Allow once" runs exactly that retry under the wider mode ([sandbox Agent Note § Escalation](../../.agents/notes/implemented/feature/2026-07-06-sandbox.md)).
-
-- **One session config option is live**: a capable client shows one `Permissions` select. `workspace-write` means workspace-confined bash plus `ask`; `danger-full-access` means unconfined bash plus `never`. Switching writes one `permission/preset` event through to the sandbox-mode and approval-policy events, and `session/load` reports the resumed value.
-- **Every approval is one-shot**: the choices are `Allow once` and `Reject`; a dismissal, rejection, missing editor, or unavailable runner fails closed.
-- **The boundary spans bash and the filesystem tools per session**: bash confines through the OS runner and the `read`/`write`/`edit` tools through an in-process path fence ([`dsh-fs-sandbox`](../../packages/fs/fs-sandbox/)); both receive the calling session's cwd as `workspaceRoot`.
-
-`tests/escalation.e2e.ts` boots this default tree keyless, drives the permission select, and—with a key and usable runner—proves both approval outcomes against the filesystem. The agent-spine e2e independently boots one context with two home-directory project sessions and world-verifies concurrent own-root success plus sibling-root denial through both shipped tool families. The keyless `session-sandbox-root` ACP snapshot places its generated project under the user home while an overlay points the deployment fallback at `/tmp`; its successful `workspace-write` call proves the assembled app used the session cwd. Most snapshots start at `danger-full-access` so bash fixtures remain runner-independent. No fixture pins real runner denial text because its dialect is platform-specific.
-
-## MVP limitations
-
-The bridge supports N concurrent sessions per connection, each with its own `cwd` (RFC 011). Prompts support ACP's baseline `text` and `resource_link` blocks only; `additionalDirectories` and `mcpServers` are rejected. See [`packages/ui/acp/README.md`](../../packages/ui/acp/README.md) for the full contract.
+- Sessions are fresh and connection-owned; load, list, resume, close, delete, and fork are unsupported.
+- Prompts accept text only; resource links, images, audio, embedded resources, non-empty additional directories, and MCP servers reject.
+- Output is committed assistant text, not live progress, tool activity, reasoning, plans, titles, or usage.
+- All sessions close with the connection; there is no per-session close method.
diff --git a/examples/acp-agent/composition.md b/examples/acp-agent/composition.md
index 841639fd90..de7639e913 100644
--- a/examples/acp-agent/composition.md
+++ b/examples/acp-agent/composition.md
@@ -1,9 +1,9 @@
 <!-- Generated by scripts/gen-doc-graphs.ts - do not edit by hand.
      Run `pnpm run gen-doc-graphs` to regenerate. -->
 
-# ACP Agent App Composition
+# ACP Automation App Composition
 
-The ACP demo exposes the same agent spine over JSON-RPC stdio, with no stdout logger and no pre-created agent; clients create sessions through the ACP bridge.
+The ACP demo exposes fresh text-only agent sessions to programmatic clients over JSON-RPC stdio, with no stdout logger, human UI, or pre-created agent.
 
 ```mermaid
 flowchart LR
@@ -18,21 +18,15 @@ flowchart LR
   cfg --> plugin_acp_bash
   plugin_acp_approval["approval<br/>@deepseek-ai/dsh-user-approval"]
   cfg --> plugin_acp_approval
-  plugin_acp_permission["permission<br/>@deepseek-ai/dsh-permission"]
-  cfg --> plugin_acp_permission
   plugin_acp_acp_agent["acp-agent<br/>@deepseek-ai/dsh-acp-demo"]
   cfg --> plugin_acp_acp_agent
   plugin_acp_acp_agent --> bundle_agent_core["@deepseek-ai/dsh-agent-spine-demo"]
   plugin_acp_acp_agent --> bundle_jsonl["@deepseek-ai/dsh-session-persistence-jsonl"]
-  plugin_acp_acp_agent --> frontdoor_acp["@deepseek-ai/dsh-acp<br/>JSON-RPC stdio bridge<br/>sessions created by client"]
+  plugin_acp_acp_agent --> frontdoor_acp["@deepseek-ai/dsh-acp<br/>automation-only JSON-RPC stdio<br/>fresh sessions created by client"]
   bundle_agent_core --> spine_llm["ctx.llm"]
   bundle_agent_core --> spine_sessions["ctx.sessions"]
   bundle_agent_core --> spine_tools["ctx.tools + tool-bash"]
   bundle_agent_core --> spine_loop["ctx.agents + ctx.agentLoop"]
-  plugin_acp_plan_mode["plan-mode<br/>@deepseek-ai/dsh-plan-mode"]
-  cfg --> plugin_acp_plan_mode
-  plugin_acp_tool_ask_user["tool-ask-user<br/>@deepseek-ai/dsh-tool-ask-user"]
-  cfg --> plugin_acp_tool_ask_user
   plugin_acp_token_meter["token-meter<br/>@deepseek-ai/dsh-token-meter"]
   cfg --> plugin_acp_token_meter
   plugin_acp_compact_basic["compact-basic<br/>@deepseek-ai/dsh-compact-basic"]
@@ -76,10 +70,7 @@ flowchart LR
 | `sandbox-policy` | `@deepseek-ai/dsh-sandbox-policy` |
 | `bash` | `@deepseek-ai/dsh-bash-sandbox` |
 | `approval` | `@deepseek-ai/dsh-user-approval` |
-| `permission` | `@deepseek-ai/dsh-permission` |
 | `acp-agent` | `@deepseek-ai/dsh-acp-demo` |
-| `plan-mode` | `@deepseek-ai/dsh-plan-mode` |
-| `tool-ask-user` | `@deepseek-ai/dsh-tool-ask-user` |
 | `token-meter` | `@deepseek-ai/dsh-token-meter` |
 | `compact-basic` | `@deepseek-ai/dsh-compact-basic` |
 | `subagent` | `@deepseek-ai/dsh-subagent` |
diff --git a/examples/acp-agent/cordis.yml b/examples/acp-agent/cordis.yml
index ffde5b0e3e..46f5fc38f6 100644
--- a/examples/acp-agent/cordis.yml
+++ b/examples/acp-agent/cordis.yml
@@ -1,7 +1,8 @@
-# ACP server and snapshot-record composition. With `DSH_SNAPSHOT=record`, the
-# app bin runs the real DeepSeek adapter and the harness harvests its persisted
-# log. The bin loads the gitignored root `.env` before this config. This tree has
-# no stdout logger or HMR because stdout carries ACP JSON-RPC.
+# ACP automation server and backend snapshot-record composition. With
+# `DSH_SNAPSHOT=record`, the app bin runs the real DeepSeek adapter and the
+# harness harvests its persisted log. The bin loads the gitignored root `.env`
+# before this config. This tree has no stdout logger or HMR because stdout
+# carries ACP JSON-RPC.
 
 # The DeepSeek adapter. Shipped default: full thinking at max effort on every
 # request (wire-only defaults; they never enter the request header).
@@ -43,10 +44,7 @@
   config:
     policy: !!js "(process.env.DSH_PERMISSION_MODE ?? (process.env.DSH_SNAPSHOT === undefined ? 'workspace-write' : 'danger-full-access')) === 'danger-full-access' ? 'never' : 'ask'"
 
-- id: permission
-  name: '@deepseek-ai/dsh-permission'
-
-# The ACP server app: the agent-spine-demo spine + JSONL persistence + the ACP bridge.
+# The ACP automation app: agent spine + JSONL persistence + protocol bridge.
 # Persistence root: $DSH_SNAPSHOT_SESSIONS_ROOT when the snapshot harness sets it
 # (so it can harvest / isolate the log), else ./.sessions for the demo.
 # Snapshot modes use raw JSONL fixtures; ordinary runs keep the compressed default.
@@ -66,29 +64,6 @@
 
       Verify your work by running the code or tests. Keep answers brief and factual.
 
-# Plan mode is additive to the canonical ACP server. The ACP bridge projects
-# it onto the protocol picker; sandbox and approval remain independent options.
-- id: plan-mode
-  name: '@deepseek-ai/dsh-plan-mode'
-  config:
-    section: |
-          You are in plan mode. Stay in plan mode until exit_plan_mode succeeds or the user switches the session mode. Imperative language to implement changes means plan the implementation, not execute it. A user's conversational agreement — including an answer confirming something you asked — approves nothing and does not end plan mode; fold the confirmed decision into the plan and submit it through exit_plan_mode.
-
-          Explore first. Use non-mutating reads, searches, static analysis, and checks to ground the plan in the actual repository. Do not edit or write files, change configuration, run formatters or code generation that rewrites tracked files, commit, or otherwise carry out the plan. Prefer existing functions and patterns over new machinery.
-
-          The tool catalog stays the same across modes for request-cache stability. These plan-mode rules override any later tool description or guidance that suggests using mutation tools; those tools remain listed only to keep the request shape stable. Do not use todo_write to track this planning phase: it tracks implementation after an approved plan, while the plan itself belongs in exit_plan_mode.
-
-          Resolve discoverable facts by inspection. Use ask_user_question only for user-owned choices or material ambiguity that inspection cannot answer. Do not ask the user where code lives or how current behavior works when you can find out.
-
-          Make the plan decision-complete: state the goal and success criteria; group implementation changes by subsystem; identify public API, schema, and data-flow changes; cover edge cases, failure modes, tests, acceptance criteria, and explicit assumptions. Keep it concise enough to review but detailed enough that another engineer can implement it without making design decisions.
-
-          When ready, call exit_plan_mode with the complete plan markdown, starting with a # title. Make exit_plan_mode the only and final tool call in that assistant response: it presents the plan for approval, and implementation begins only in a later step after approval. Do not paste the final plan as a plain reply or ask "should I proceed?" through prose or ask_user_question. If review rejects it, incorporate the feedback and present again. If the review channel is unavailable or aborted, stay in plan mode and ask the user to switch modes manually; do not proceed with implementation.
-
-# Blocking plan decisions and ordinary clarifications share ACP's elicitation
-# provider through the model-facing question tool.
-- id: tool-ask-user
-  name: '@deepseek-ai/dsh-tool-ask-user'
-
 # Replay-aware request pressure; the routed adapter supplies model capacity.
 - id: token-meter
   name: '@deepseek-ai/dsh-token-meter'
@@ -146,7 +121,7 @@
 
 - id: tool-ralph
   name: '@deepseek-ai/dsh-tool-ralph'
-# `todo_write` replaces the logged whole list and surfaces an ACP `plan` update.
+# `todo_write` replaces the logged whole list for later model requests.
 - id: tool-todo
   name: '@deepseek-ai/dsh-tool-todo'
 
diff --git a/examples/acp-agent/package.json b/examples/acp-agent/package.json
index 8ee54f5650..1bbb85d6a9 100644
--- a/examples/acp-agent/package.json
+++ b/examples/acp-agent/package.json
@@ -1,6 +1,6 @@
 {
   "name": "acp-agent-example",
-  "description": "Runnable demo: an agent as an ACP server over JSON-RPC stdio (Zed & other ACP editors)",
+  "description": "Runnable demo: an ACP automation server over JSON-RPC stdio",
   "private": true,
   "version": "0.0.1",
   "type": "module"
diff --git a/examples/acp-agent/tests/acp.e2e.ts b/examples/acp-agent/tests/acp.e2e.ts
index 46592e4704..b51498e90c 100644
--- a/examples/acp-agent/tests/acp.e2e.ts
+++ b/examples/acp-agent/tests/acp.e2e.ts
@@ -66,8 +66,8 @@ describe('acp-agent over real stdio (no key required)', () => {
   }, 30_000)
 
   it('session/new succeeds over real stdio (no model call)', async () => {
-    // REGRESSION GUARD (this exact RPC crashed a real Zed session with
-    // "cannot get property \"agents\" without inject"): `session/new` drives the
+    // REGRESSION GUARD (this exact RPC exposed the missing-inject Loader bug):
+    // `session/new` drives the
     // full bridge → `ctx.agents.create({sessionId, meta:{cwd}})` → AgentLoop →
     // registry/persistence path, ALL of which run from the JSON-RPC read loop
     // OUTSIDE the bridge plugin's injection scope. A lazy `ctx.<service>` read
@@ -118,60 +118,9 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('acp-agent e2e: real prompt over
     const proof = await readFile(join(workdir, 'proof.txt'), 'utf8')
     expect(proof).toContain('ACP_OK')
 
-    // And the client saw tool-call activity stream through.
-    const toolCalls = updates.filter(u => u.sessionUpdate === 'tool_call')
-    expect(toolCalls.length).toBeGreaterThan(0)
-
-    // Tool-call UI quality (the tool owns its presentation): the bash tool's
-    // `presentCall` sets the title to the exact command (an execute card hides
-    // rawInput, so the command IS the title) — NOT the bare tool name "bash".
-    // A `bash` call must therefore carry an execute kind, a non-"bash" title,
-    // and a string rawInput (the command). `toolCalls` is already narrowed to
-    // the `tool_call` shape by the filter above, so these fields are reachable.
-    const bashCall = toolCalls.find(u => u.kind === 'execute')
-    expect(bashCall).toBeDefined()
-    if (bashCall === undefined) throw new Error('expected an execute tool_call')
-    expect(typeof bashCall.title).toBe('string')
-    expect(bashCall.title.length).toBeGreaterThan(0)
-    expect(bashCall.title).not.toBe('bash') // the old, unhelpful title
-    expect(typeof bashCall.rawInput).toBe('string') // the exact command
-    // Capability OFF: no terminal _meta — the ```console text path renders.
-    expect((bashCall as { _meta?: unknown })._meta).toBeUndefined()
-  }, 180_000)
-
-  it('with the terminal_output capability, a real bash call renders as a terminal card (content + _meta + exit)', async () => {
-    workdir = await mkdtemp(join(tmpdir(), 'acp-e2e-'))
-    spawned = launchAcpTestAgent({ agent: AGENT, cwd: workdir, env: DANGER_FULL_ACCESS_ENV })
-    const { client, updates } = spawned
-
-    // Advertise the Zed `_meta.terminal_output` capability so the bridge emits
-    // the terminal card for the real bash tool.
-    await client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: { _meta: { terminal_output: true } } })
-    const { sessionId } = await client.newSession({ cwd: workdir, mcpServers: [] })
-    const res = await client.prompt({
-      sessionId,
-      prompt: [{ type: 'text', text: 'Use the bash tool to run: echo ACP_TERMINAL_OK. Then stop.' }],
-    })
-    expect(['end_turn', 'max_tokens']).toContain(res.stopReason)
-
-    // A bash tool_call now carries a terminal content block + _meta.terminal_info
-    // with the session cwd as the header; the matching update streams the output
-    // on _meta.terminal_output.
-    const bashCall = updates.find(u => u.sessionUpdate === 'tool_call' && u.kind === 'execute')
-    if (bashCall?.sessionUpdate !== 'tool_call') throw new Error('expected an execute tool_call')
-    // The content carries the description text block AND a terminal block (the
-    // description renders above the card) — find the terminal block by type, not
-    // by position.
-    const blocks = (bashCall.content ?? []) as { type: string; terminalId?: string }[]
-    const terminalBlock = blocks.find(b => b.type === 'terminal')
-    expect(terminalBlock).toBeDefined()
-    expect(typeof terminalBlock?.terminalId).toBe('string')
-    const info = (bashCall._meta as { terminal_info?: { terminal_id: string; cwd?: string } }).terminal_info
-    expect(info?.cwd).toBe(workdir)
-    const updatesForTerminal = updates.filter(u => u.sessionUpdate === 'tool_call_update' && (u._meta as { terminal_output?: unknown } | undefined)?.terminal_output !== undefined)
-    expect(updatesForTerminal.length).toBeGreaterThan(0)
-    // The completed update also carries the parsed exit on _meta.terminal_exit.
-    const exitUpdate = updates.find(u => u.sessionUpdate === 'tool_call_update' && (u._meta as { terminal_exit?: unknown } | undefined)?.terminal_exit !== undefined)
-    expect(exitUpdate).toBeDefined()
+    // The transport exposes only committed assistant text; tool execution is
+    // proved by the world effect above and remains session-log data.
+    expect(updates.length).toBeGreaterThan(0)
+    expect(updates.every(update => update.sessionUpdate === 'agent_message_chunk')).toBe(true)
   }, 180_000)
 })
diff --git a/examples/acp-agent/tests/acp.snapshot.ts b/examples/acp-agent/tests/acp.snapshot.ts
index e35d47cea0..4a21dfbd9a 100644
--- a/examples/acp-agent/tests/acp.snapshot.ts
+++ b/examples/acp-agent/tests/acp.snapshot.ts
@@ -42,6 +42,9 @@ const LSP_CONFIG = fileURLToPath(new URL('./lsp.cordis.yml', import.meta.url))
 const SNAPSHOTS_DIR = join(dirname(fileURLToPath(import.meta.url)), 'snapshots')
 const PACKED_CHUNKS_SOURCE = 'hook-cc-pretool-deny'
 
+// FIXME: Migrate backend-oriented scenarios to the headless stream-json suite;
+// this ACP suite should eventually retain only automation-protocol contracts.
+
 function fixtureRecords(name: string): unknown[] {
   return readFileSync(join(SNAPSHOTS_DIR, name, 'session.jsonl'), 'utf8')
     .trimEnd()
@@ -67,22 +70,6 @@ function snapshotModeFromEnv(value: string | undefined): SnapshotSuiteOptions['m
 const SCENARIOS: Scenario[] = [
   { name: 'handshake', hasModelTurn: false, recorded: false },
   { name: 'reject-extra-dirs', hasModelTurn: false, recorded: false },
-  // Direct command dispatch reports goal state without spending a model turn.
-  { name: 'goal-command-status', hasModelTurn: false, recorded: false },
-  // Protocol-only (keyless, authored): session/new advertises the mode picker,
-  // session/set_mode acknowledges a valid selection, and an unknown mode id
-  // fails loudly. With no model turn, its membership in the plan header class
-  // is vacuous; the class still needs one explicit pin below.
-  { name: 'modes-advertise', hasModelTurn: false, recorded: false, headerClass: 'plan' },
-  // The plan header pin covers the full arc: setMode(plan), a real read under
-  // the independently configured sandbox, plan review through exit_plan_mode,
-  // an approved boundary flip back to default, and a real edit in the next
-  // step. Leaving plan removes the policy section and exit tool, producing one
-  // changed request header.
-  { name: 'plan-mode', hasModelTurn: true, recorded: true, pinsHeader: true, headerClass: 'plan', expectedHeaderChanges: 1 },
-  // Free-text review feedback returns as a corrective error and leaves the
-  // session in plan mode, so this scenario shares the pinned plan header.
-  { name: 'plan-mode-reject', hasModelTurn: true, recorded: true, headerClass: 'plan' },
   // text-turn is the pinned-header scenario: the minimal single text turn.
   // Its prompt and tool-schema sidecars pin the composed header.
   { name: 'text-turn', hasModelTurn: true, recorded: true, pinsHeader: true },
@@ -108,15 +95,14 @@ const SCENARIOS: Scenario[] = [
     headerClass: 'pty',
     configPath: PTY_CONFIG,
   },
-  { name: 'fs-terminal-card', hasModelTurn: true, recorded: true },
-  { name: 'todo-plan', hasModelTurn: true, recorded: true },
+  { name: 'bash-tool-turn', hasModelTurn: true, recorded: true },
+  { name: 'todo-write', hasModelTurn: true, recorded: true },
   { name: 'skill-load', hasModelTurn: true, recorded: false, pinsHeader: true, headerClass: 'skill' },
   { name: 'lsp-definition', hasModelTurn: true, recorded: false, pinsHeader: true, headerClass: 'lsp', configPath: LSP_CONFIG },
   {
     name: 'workspace-edit',
     hasModelTurn: true,
     recorded: true,
-    pinsNativeWindowsStdout: true,
   },
   { name: 'fs-read', hasModelTurn: true, recorded: true },
   { name: 'fs-write', hasModelTurn: true, recorded: true },
@@ -125,17 +111,6 @@ const SCENARIOS: Scenario[] = [
   { name: 'fs-read-window', hasModelTurn: true, recorded: true },
   { name: 'fs-policy-reject', hasModelTurn: true, recorded: true },
   { name: 'multi-turn', hasModelTurn: true, recorded: true },
-  // ACP exposes the adapter catalog as a session-scoped model select. This
-  // scenario pins the default flash request, the switch response, and the
-  // resulting changed request-header snapshot for pro.
-  {
-    name: 'model-switching',
-    hasModelTurn: true,
-    recorded: true,
-    pinsHeader: true,
-    expectedHeaderChanges: 1,
-    headerClass: 'model-switching',
-  },
   { name: 'error-finish', hasModelTurn: true, recorded: false, overridden: true },
   // Keyless, authored (like error-finish/cancel): deterministically forcing a
   // LIVE model to repeat one call three times is not a stable recording, so
@@ -231,16 +206,30 @@ const SCENARIOS: Scenario[] = [
     configPath: CODE_MODE_WORKSPACE_CONTEXT_CONFIG,
   },
   { name: 'both-mode-turn', hasModelTurn: true, recorded: true, pinsHeader: true, headerClass: 'both', configPath: BOTH_MODE_CONFIG },
-  // The default tree also owns the Permissions select. Snapshot mode starts in
-  // danger-full-access so established fixtures stay runner-independent; these
-  // policy scenarios switch to workspace-write in their input scripts.
-  // Real-kernel confinement remains in escalation.e2e.ts and the sandbox
-  // packages' e2e suites.
-  { name: 'config-options', hasModelTurn: false, recorded: false, headerClass: 'sandbox' },
-  { name: 'permission-switching', hasModelTurn: true, recorded: true, pinsHeader: true, expectedHeaderChanges: 1, headerClass: 'sandbox' },
-  { name: 'escalation-approved', hasModelTurn: true, recorded: true, headerClass: 'sandbox' },
-  { name: 'escalation-rejected', hasModelTurn: true, recorded: true, headerClass: 'sandbox' },
-  { name: 'fs-escalation-approved', hasModelTurn: true, recorded: true, headerClass: 'sandbox' },
+  // Machine permission scenarios use an explicit deployment policy; there is
+  // no session-scoped UI picker on the automation protocol.
+  {
+    name: 'escalation-approved',
+    hasModelTurn: true,
+    recorded: true,
+    pinsHeader: true,
+    headerClass: 'sandbox',
+    env: { DSH_PERMISSION_MODE: 'workspace-write' },
+  },
+  {
+    name: 'escalation-rejected',
+    hasModelTurn: true,
+    recorded: true,
+    headerClass: 'sandbox',
+    env: { DSH_PERMISSION_MODE: 'workspace-write' },
+  },
+  {
+    name: 'fs-escalation-approved',
+    hasModelTurn: true,
+    recorded: true,
+    headerClass: 'sandbox',
+    env: { DSH_PERMISSION_MODE: 'workspace-write' },
+  },
   // Unlike ordinary snapshots, this session cwd is outside the platform temp
   // roots that workspace-write always grants. The overlay points the
   // deployment fallback at /tmp, so a successful relative write proves the
@@ -252,6 +241,7 @@ const SCENARIOS: Scenario[] = [
     overridden: true,
     headerClass: 'sandbox',
     configPath: SESSION_SANDBOX_ROOT_CONFIG,
+    env: { DSH_PERMISSION_MODE: 'workspace-write' },
     workspaceParent: homedir(),
   },
 ]
diff --git a/examples/acp-agent/tests/escalation.e2e.ts b/examples/acp-agent/tests/escalation.e2e.ts
index 1bf0a5ac16..ee2d6122bc 100644
--- a/examples/acp-agent/tests/escalation.e2e.ts
+++ b/examples/acp-agent/tests/escalation.e2e.ts
@@ -25,7 +25,7 @@ import { cleanupAcpExampleTest } from './cleanup.ts'
  * model nor a sandbox runner is ever exercised.
  *
  * With-key escalation flow (self-skips without DEEPSEEK_API_KEY or a usable
- * platform runner): a scripted ACP client plays the human. The subprocess
+ * platform runner): a scripted ACP client supplies machine policy. The subprocess
  * starts read-only, its first real bash write is denied, the model retries with
  * `sandbox_permissions` + `justification`, and the bridge prompts THIS client
  * over `session/request_permission`. An approved workspace-write retry must
@@ -74,8 +74,8 @@ function launchExampleAcpAgent(
     requestPermission(params) {
       permissionRequests.push(params)
       const option = params.options.find(o => o.optionId === answer)
-      // The scripted human: pick the requested option when the prompt offers
-      // it; an unexpected prompt shape cancels (fail closed, never grants).
+      // The scripted machine policy selects the requested option; an
+      // unexpected request shape cancels (fail closed, never grants).
       if (option === undefined) return Promise.resolve({ outcome: { outcome: 'cancelled' } })
       return Promise.resolve({ outcome: { outcome: 'selected', optionId: option.optionId } })
     },
@@ -89,11 +89,6 @@ function escalationPrompt(path: string, content: string): string {
     + 'with sandbox_permissions set to workspace-write and a one-sentence justification.'
 }
 
-function includesReadOnlyDenial(updates: LaunchedAcpTestAgent['updates']): boolean {
-  return updates.some(update => update.sessionUpdate === 'tool_call_update'
-    && JSON.stringify(update.content).includes('[sandbox: file access denied under read-only mode]'))
-}
-
 let spawned: Spawned | undefined
 let workdir: string | undefined
 
@@ -112,46 +107,20 @@ describe('default sandbox composition keyless smoke (real cordis.yml via the Loa
     const { client } = spawned
     // A dummy key boots the adapter; no prompt is ever sent, so no model call
     // and no sandbox runner probe happen. This drives the fiber tree the same
-    // way an editor would, which is what catches a broken export/inject shape.
+    // way an ACP caller would, which catches a broken export/inject shape.
     const init = await client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
     expect(init.protocolVersion).toBe(PROTOCOL_VERSION)
+    expect(init.agentCapabilities).toEqual({
+      promptCapabilities: { image: false, audio: false, embeddedContext: false },
+    })
     const { sessionId } = await client.newSession({ cwd: workdir, mcpServers: [] })
     expect(sessionId.length).toBeGreaterThan(0)
   }, 30_000)
 
-  it('advertises model and Permissions selects and honors a permission switch without a model call', async () => {
-    workdir = await mkdtemp(join(tmpdir(), 'sandbox-acp-config-'))
-    spawned = launchExampleAcpAgent(workdir, 'reject-once')
-    const { client } = spawned
-    await client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    // This tree composes the permission presets over bash-sandbox + approval →
-    // ONE select advertises, current from the configured default preset.
-    const created = await client.newSession({ cwd: workdir, mcpServers: [] })
-    const advertised = created.configOptions ?? []
-    const modelValue = JSON.stringify(['deepseek', 'deepseek-v4-pro'])
-    expect(advertised.map(option => [option.id, 'currentValue' in option ? option.currentValue : undefined]))
-      .toEqual([['model', modelValue], ['permission', 'workspace-write']])
-    // A switch responds with the COMPLETE refreshed state (the spec contract),
-    // and the new current survives in the response of a second switch.
-    const afterFullAccess = await client.setSessionConfigOption({
-      sessionId: created.sessionId, configId: 'permission', value: 'danger-full-access',
-    })
-    expect(afterFullAccess.configOptions?.find(option => option.id === 'permission'))
-      .toMatchObject({ currentValue: 'danger-full-access' })
-    const again = await client.setSessionConfigOption({
-      sessionId: created.sessionId, configId: 'permission', value: 'danger-full-access',
-    })
-    expect((again.configOptions ?? []).map(option => [option.id, 'currentValue' in option ? option.currentValue : undefined]))
-      .toEqual([['model', modelValue], ['permission', 'danger-full-access']])
-    // An out-of-vocabulary value is a protocol error, never a silent default.
-    await expect(client.setSessionConfigOption({
-      sessionId: created.sessionId, configId: 'permission', value: 'plan',
-    })).rejects.toThrow(/unknown permission value/)
-  }, 30_000)
 })
 
 describe.skipIf(!process.env.DEEPSEEK_API_KEY || !hasRunner)('default sandbox composition e2e: the live approval loop', () => {
-  it('denial → model escalation → editor prompt → allow-once → the retried write lands on disk', async () => {
+  it('denial → model escalation → machine allow-once → the retried write lands on disk', async () => {
     workdir = await mkdtemp(join(tmpdir(), 'sandbox-acp-e2e-'))
     spawned = launchExampleAcpAgent(workdir, 'allow-once', 'read-only')
     const { client, permissionRequests, updates } = spawned
@@ -166,14 +135,14 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY || !hasRunner)('default sandbox co
       }],
     })
     expect(['end_turn', 'max_tokens']).toContain(res.stopReason)
-    expect(includesReadOnlyDenial(updates)).toBe(true)
+    expect(updates.every(update => update.sessionUpdate === 'agent_message_chunk')).toBe(true)
 
     // The WORLD: the approved escalated retry landed the write.
     const proof = await readFile(join(workdir, 'escalated.txt'), 'utf8')
     expect(proof).toContain('ACP_ESCALATION_OK')
 
     // The CHANNEL: the grant came through a real session/request_permission
-    // prompt attached to the escalating tool call, offering exactly the
+    // request attached to the escalating tool call, offering exactly the
     // one-shot options.
     expect(permissionRequests.length).toBeGreaterThan(0)
     const prompt = permissionRequests[0]
@@ -198,11 +167,11 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY || !hasRunner)('default sandbox co
       }],
     })
     expect(['end_turn', 'max_tokens']).toContain(res.stopReason)
-    expect(includesReadOnlyDenial(updates)).toBe(true)
+    expect(updates.every(update => update.sessionUpdate === 'agent_message_chunk')).toBe(true)
 
     // The WORLD: rejected means the file never appeared.
     await expect(readFile(join(workdir, 'refused.txt'), 'utf8')).rejects.toThrow()
-    // And the rejection really flowed through a prompt (not a missing channel).
+    // And the rejection flowed through the machine-policy channel.
     expect(permissionRequests.length).toBeGreaterThan(0)
   }, 240_000)
 })
diff --git a/examples/acp-agent/tests/fixtures/live-mode-switching-2026-07-07.session.jsonl b/examples/acp-agent/tests/fixtures/live-mode-switching-2026-07-07.session.jsonl
deleted file mode 100644
index 10ffb8c507..0000000000
--- a/examples/acp-agent/tests/fixtures/live-mode-switching-2026-07-07.session.jsonl
+++ /dev/null
@@ -1,2212 +0,0 @@
-{"type":"session","version":0,"id":"ed16a7e7-a76f-459f-b889-d4c424d66ef6","createdAt":1783421406247,"cwd":"/Users/wwl/workspace/deepseek-harness","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":1783421410388,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"user/message","seq":1,"time":1783421410388,"data":{"content":[{"type":"text","text":"你好"}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"step/start","seq":2,"time":1783421410389,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":3,"time":1783421410389,"data":{"header":{"config":{"model":"deepseek-v4-flash"},"system":"You are an AI agent powered by the DeepSeek Harness SDK.\n\nYou are a coding assistant powered by the deepseek-v4-flash model. Your working\ndirectory is /Users/wwl/workspace/deepseek-harness. Your bash tool runs under a file sandbox — a\n`[sandbox: file access denied …]` result is policy, not a command bug.\n\nVerify your work by running the code or tests. Keep answers brief and\nfactual.\n\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nBash commands run under the \"read-only\" file sandbox.","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way (a background task reports the same marker via bash_output once it has finished). Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; poll it with `bash_output` and stop it with `bash_kill`. The ONE sanctioned exception to a sandbox denial: retry the exact same command once with `sandbox_permissions` (the wider mode it needs) plus a one-sentence `justification` — the user is asked to approve that single run. Never request escalation before a real denial, and treat a rejected escalation as final: stop and explain instead of working around it.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a task id immediately. No timeout applies."},"sandbox_permissions":{"type":"string","description":"The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.","enum":["workspace-write","danger-full-access"]},"justification":{"type":"string","description":"Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."}},"required":["command","description"]}},{"name":"bash_output","description":"Read new output from a background bash task started with `bash` + `run_in_background`. Returns only output produced since the previous bash_output call, plus the task status. Tasks keep running while you do other work; poll again later for more output.","parameters":{"type":"object","properties":{"task_id":{"type":"string","description":"Task id returned by the bash tool."}},"required":["task_id"]}},{"name":"bash_kill","description":"Ask the executor to kill a running background bash task by task id.","parameters":{"type":"object","properties":{"task_id":{"type":"string","description":"Task id returned by the bash tool."}},"required":["task_id"]}}]},"reason":"initial"}}
-{"type":"assistant/chunk","seq":4,"time":1783421411079,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"assistant/chunk","seq":5,"time":1783421411079,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"The"}}}
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-{"type":"assistant/chunk","seq":2181,"time":1783421555836,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"创建"}}}
-{"type":"assistant/chunk","seq":2182,"time":1783421555837,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" |\n"}}}
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-{"type":"assistant/chunk","seq":2187,"time":1783421555869,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"`"}}}
-{"type":"assistant/chunk","seq":2188,"time":1783421555869,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" |"}}}
-{"type":"assistant/chunk","seq":2189,"time":1783421555869,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" home"}}}
-{"type":"assistant/chunk","seq":2190,"time":1783421555905,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" "}}}
-{"type":"assistant/chunk","seq":2191,"time":1783421555905,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"目录"}}}
-{"type":"assistant/chunk","seq":2192,"time":1783421555905,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" |"}}}
-{"type":"assistant/chunk","seq":2193,"time":1783421555905,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" ❌"}}}
-{"type":"assistant/chunk","seq":2194,"time":1783421555905,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" "}}}
-{"type":"assistant/chunk","seq":2195,"time":1783421555930,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"未"}}}
-{"type":"assistant/chunk","seq":2196,"time":1783421555930,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"创建"}}}
-{"type":"assistant/chunk","seq":2197,"time":1783421555930,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":" |\n\n"}}}
-{"type":"assistant/chunk","seq":2198,"time":1783421555930,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"要"}}}
-{"type":"assistant/chunk","seq":2199,"time":1783421555965,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"一口气"}}}
-{"type":"assistant/chunk","seq":2200,"time":1783421555977,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"全"}}}
-{"type":"assistant/chunk","seq":2201,"time":1783421556008,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"搞定"}}}
-{"type":"assistant/chunk","seq":2202,"time":1783421556008,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"吗"}}}
-{"type":"assistant/chunk","seq":2203,"time":1783421556008,"data":{"turn":9,"step":2,"chunk":{"type":"text-delta","index":1,"text":"？"}}}
-{"type":"assistant/chunk","seq":2204,"time":1783421556009,"data":{"turn":9,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"创建成功。既然现在是 danger-full-access 模式，我可以顺便问一下用户是否要补上之前没成功的 b.md、c.md、e.md 和 g.md。"}}}}
-{"type":"assistant/chunk","seq":2205,"time":1783421556009,"data":{"turn":9,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"`h.md` 已成功创建！现在权限已提升为 `danger-full-access`，我可以自由读写任何位置了。\n\n需要我帮你把之前遗漏的也一并补上吗？\n\n| 文件 | 位置 | 状态 |\n|------|------|------|\n| `b.md` | 工作目录 | ❌ 未创建 |\n| `c.md` | 工作目录 | ❌ 未创建 |\n| `e.md` | home 目录 | ❌ 未创建 |\n| `g.md` | home 目录 | ❌ 未创建 |\n\n要一口气全搞定吗？"}}}}
-{"type":"assistant/chunk","seq":2206,"time":1783421556009,"data":{"turn":9,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":90,"outputTokens":164,"cacheReadTokens":3840,"reasoningTokens":36}}}}
-{"type":"assistant/chunk","seq":2207,"time":1783421556009,"data":{"turn":9,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":2208,"time":1783421556009,"data":{"turn":9,"step":2,"content":[{"type":"reasoning","text":"创建成功。既然现在是 danger-full-access 模式，我可以顺便问一下用户是否要补上之前没成功的 b.md、c.md、e.md 和 g.md。"},{"type":"text","text":"`h.md` 已成功创建！现在权限已提升为 `danger-full-access`，我可以自由读写任何位置了。\n\n需要我帮你把之前遗漏的也一并补上吗？\n\n| 文件 | 位置 | 状态 |\n|------|------|------|\n| `b.md` | 工作目录 | ❌ 未创建 |\n| `c.md` | 工作目录 | ❌ 未创建 |\n| `e.md` | home 目录 | ❌ 未创建 |\n| `g.md` | home 目录 | ❌ 未创建 |\n\n要一口气全搞定吗？"}],"usage":{"inputTokens":90,"outputTokens":164,"cacheReadTokens":3840,"reasoningTokens":36}},"sourceEventSeqs":[2043,2044,2045,2046,2047,2048,2049,2050,2051,2052,2053,2054,2055,2056,2057,2058,2059,2060,2061,2062,2063,2064,2065,2066,2067,2068,2069,2070,2071,2072,2073,2074,2075,2076,2077,2078,2079,2080,2081,2082,2083,2084,2085,2086,2087,2088,2089,2090,2091,2092,2093,2094,2095,2096,2097,2098,2099,2100,2101,2102,2103,2104,2105,2106,2107,2108,2109,2110,2111,2112,2113,2114,2115,2116,2117,2118,2119,2120,2121,2122,2123,2124,2125,2126,2127,2128,2129,2130,2131,2132,2133,2134,2135,2136,2137,2138,2139,2140,2141,2142,2143,2144,2145,2146,2147,2148,2149,2150,2151,2152,2153,2154,2155,2156,2157,2158,2159,2160,2161,2162,2163,2164,2165,2166,2167,2168,2169,2170,2171,2172,2173,2174,2175,2176,2177,2178,2179,2180,2181,2182,2183,2184,2185,2186,2187,2188,2189,2190,2191,2192,2193,2194,2195,2196,2197,2198,2199,2200,2201,2202,2203,2204,2205,2206,2207],"surfaceOp":"append"}
-{"type":"step/end","seq":2209,"time":1783421556009,"data":{"turn":9,"step":2}}
-{"type":"turn/end","seq":2210,"time":1783421556009,"data":{"turn":9,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/goal-snapshots/goal-session/input.json b/examples/acp-agent/tests/goal-snapshots/goal-session/input.json
index 93392c9e0f..563e3bd1c6 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-session/input.json
+++ b/examples/acp-agent/tests/goal-snapshots/goal-session/input.json
@@ -5,8 +5,9 @@
     {
       "op": "promptAndWaitForAgentMessage",
       "text": "Create a durable two-round goal for the ACP snapshot, inspect it, then report readiness.",
-      "waitForText": "partial"
+      "waitForText": "GOAL ROUND ONE"
     },
-    { "op": "cancel" }
+    { "op": "waitForTurnStart", "minimumTurn": 3 },
+    { "op": "cancel", "waitForFile": { "path": ".dsh-snapshot-goal-cancel-ready" } }
   ]
 }
diff --git a/examples/acp-agent/tests/goal-snapshots/goal-session/replay.override.json b/examples/acp-agent/tests/goal-snapshots/goal-session/replay.override.json
index b0c5c0f28f..4f5c06fee6 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-session/replay.override.json
+++ b/examples/acp-agent/tests/goal-snapshots/goal-session/replay.override.json
@@ -39,5 +39,5 @@
       { "type": "finish", "reason": { "kind": "stop" } }
     ]
   },
-  { "kind": "hang" }
+  { "kind": "hang", "readyFile": ".dsh-snapshot-goal-cancel-ready" }
 ]
diff --git a/examples/acp-agent/tests/goal-snapshots/goal-session/stdout.expected.jsonl b/examples/acp-agent/tests/goal-snapshots/goal-session/stdout.expected.jsonl
index 48965f6b4f..9a54cb88c8 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-session/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/goal-snapshots/goal-session/stdout.expected.jsonl
@@ -1,12 +1,5 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Create a durable two-round goal","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_goal_create","title":"Create goal","kind":"other","status":"in_progress","rawInput":"Finish the ACP goal-session snapshot proof"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_goal_create","status":"completed","content":[{"type":"content","content":{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_goal_get","title":"Read current goal","kind":"read","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_goal_get","status":"completed","content":[{"type":"content","content":{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"GOAL READY"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"GOAL ROUND ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"partial"}}}}
diff --git a/examples/acp-agent/tests/goal.snapshot.ts b/examples/acp-agent/tests/goal.snapshot.ts
index 4bb01acd16..a09dcdeca9 100644
--- a/examples/acp-agent/tests/goal.snapshot.ts
+++ b/examples/acp-agent/tests/goal.snapshot.ts
@@ -15,7 +15,7 @@ import type { SessionEvent } from '@deepseek-ai/dsh-session'
 import { describe, expect, it } from 'vitest'
 
 // This lifecycle proof has goal-specific timestamp normalization and semantic
-// assertions, so it owns a separate snapshot root from the generic ACP suite.
+// assertions, so it owns a separate snapshot root from the generic suite.
 const scenarioDir = join(dirname(fileURLToPath(import.meta.url)), 'goal-snapshots/goal-session')
 const fixtureFile = join(scenarioDir, 'session.jsonl')
 const overrideFile = join(scenarioDir, 'replay.override.json')
@@ -63,7 +63,7 @@ function normalizeGoalLog(content: string, context: NormalizeContext): string {
     .join('\n') + '\n'
 }
 
-describe('ACP same-session goal snapshot', () => {
+describe('same-session goal snapshot through the ACP automation driver', () => {
   it('runs exact automatic rounds in the shipped application and persists cancellation', async () => {
     const input = JSON.parse(await readFile(join(scenarioDir, 'input.json'), 'utf8')) as InputScript
     const result = await runScenario(input, {
@@ -77,7 +77,7 @@ describe('ACP same-session goal snapshot', () => {
     expect(result.stderr).toBe('')
     expect(result.sessionLogs).toHaveLength(1)
     const log = result.sessionLogs[0]
-    if (log === undefined) throw new Error('goal snapshot did not persist its ACP session')
+    if (log === undefined) throw new Error('goal snapshot did not persist its session')
     const records = parseJsonl(log.content)
     const events = records.slice(1) as unknown as SessionEvent[]
     const calls = events.filter(event => event.type === 'tool/call').map(event => event.data.name)
diff --git a/examples/acp-agent/tests/hooks.e2e.ts b/examples/acp-agent/tests/hooks.e2e.ts
index 528823f3c5..49669e6b9b 100644
--- a/examples/acp-agent/tests/hooks.e2e.ts
+++ b/examples/acp-agent/tests/hooks.e2e.ts
@@ -65,8 +65,8 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('acp-agent e2e: a PreToolUse hook
     // Verify that the denied hook left no filesystem effect.
     await expect(access(join(workdir, 'proof.txt'))).rejects.toThrow()
 
-    // A blocked call is still streamed with the hook's reason as an error.
-    const toolCalls = updates.filter(u => u.sessionUpdate === 'tool_call' || u.sessionUpdate === 'tool_call_update')
-    expect(toolCalls.length).toBeGreaterThan(0)
+    // ACP publishes only the committed answer; hook/tool trace stays in the session log.
+    expect(updates.length).toBeGreaterThan(0)
+    expect(updates.every(update => update.sessionUpdate === 'agent_message_chunk')).toBe(true)
   }, 180_000)
 })
diff --git a/examples/acp-agent/tests/plan-mode.e2e.ts b/examples/acp-agent/tests/plan-mode.e2e.ts
deleted file mode 100644
index 31cfc804f5..0000000000
--- a/examples/acp-agent/tests/plan-mode.e2e.ts
+++ /dev/null
@@ -1,84 +0,0 @@
-import { mkdtemp, readFile, rm, writeFile } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { fileURLToPath } from 'node:url'
-import { afterEach, describe, expect, it } from 'vitest'
-import {
-  PROTOCOL_VERSION,
-  type CreateElicitationRequest,
-  type CreateElicitationResponse,
-} from '@agentclientprotocol/sdk'
-import {
-  launchAcpTestAgent,
-  type AgentUnderTest,
-  type LaunchedAcpTestAgent,
-} from '@deepseek-ai/dsh-acp-snapshot'
-
-/** The shipped ACP leaf's plan mode exercised through its real subprocess entry. */
-const AGENT: AgentUnderTest = {
-  binScript: fileURLToPath(new URL('../../../packages/examples/acp-demo/src/bin.ts', import.meta.url)),
-  configPath: fileURLToPath(new URL('../cordis.yml', import.meta.url)),
-  tsconfigPath: fileURLToPath(new URL('../../../tsconfig.json', import.meta.url)),
-}
-
-let spawned: LaunchedAcpTestAgent | undefined
-let workdir: string | undefined
-
-afterEach(async () => {
-  const ownedSpawned = spawned
-  const ownedWorkdir = workdir
-  spawned = undefined
-  workdir = undefined
-  try {
-    if (ownedSpawned !== undefined) {
-      await ownedSpawned.close('SIGKILL').catch((error: unknown) => {
-        throw new Error(`plan ACP cleanup failed; child stderr:\n${ownedSpawned.stderr()}`, { cause: error })
-      })
-    }
-  } finally {
-    if (ownedWorkdir !== undefined) await rm(ownedWorkdir, { recursive: true, force: true })
-  }
-})
-
-describe.skipIf(!process.env.DEEPSEEK_API_KEY)('acp-agent plan mode e2e: approval gates implementation (real model)', () => {
-  it('keeps the file unchanged through review, then applies the approved plan', async () => {
-    workdir = await mkdtemp(join(tmpdir(), 'acp-plan-e2e-'))
-    const proofPath = join(workdir, 'proof.txt')
-    await writeFile(proofPath, 'BEFORE\n')
-
-    const reviews: CreateElicitationRequest[] = []
-    let contentAtReview: string | undefined
-    const createElicitation = async (request: CreateElicitationRequest): Promise<CreateElicitationResponse> => {
-      if (request.mode !== 'form' || request.requestedSchema.title !== 'Plan review') return { action: 'cancel' }
-      reviews.push(request)
-      contentAtReview = await readFile(proofPath, 'utf8')
-      return { action: 'accept', content: { choice: 'Approve' } }
-    }
-
-    spawned = launchAcpTestAgent({ agent: AGENT, cwd: workdir, createElicitation })
-    const { client, updates } = spawned
-    const rpc = async <T>(stage: string, operation: Promise<T>): Promise<T> => operation.catch((error: unknown) => {
-      throw new Error(`plan ACP ${stage} failed; child stderr:\n${spawned?.stderr() ?? '<unavailable>'}`, { cause: error })
-    })
-    await rpc('initialize', client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} }))
-    const created = await rpc('session/new', client.newSession({ cwd: workdir, mcpServers: [] }))
-    expect(created.modes?.availableModes.map(mode => mode.id)).toEqual(['default', 'plan'])
-    await rpc('session/set_mode', client.setSessionMode({ sessionId: created.sessionId, modeId: 'plan' }))
-
-    const result = await rpc('prompt', client.prompt({
-      sessionId: created.sessionId,
-      prompt: [{
-        type: 'text',
-        text: 'Inspect proof.txt and plan the smallest change that replaces its contents with exactly AFTER followed by one newline. Present the complete plan through exit_plan_mode. After I approve it, implement the change with the filesystem tools, verify the exact file contents, and stop. Do not ask questions.',
-      }],
-    }))
-
-    expect(['end_turn', 'max_tokens']).toContain(result.stopReason)
-    expect(reviews).toHaveLength(1)
-    expect(contentAtReview).toBe('BEFORE\n')
-    expect(await readFile(proofPath, 'utf8')).toBe('AFTER\n')
-    expect(updates
-      .filter(update => update.sessionUpdate === 'current_mode_update')
-      .map(update => update.currentModeId)).toEqual(['plan', 'default'])
-  }, 240_000)
-})
diff --git a/examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/stdout.expected.jsonl b/examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/stdout.expected.jsonl
deleted file mode 100644
index 96896d268a..0000000000
--- a/examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/stdout.expected.jsonl
+++ /dev/null
@@ -1,9 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"user_message_chunk","content":{"type":"text","text":"Perform one side-effecting remote mutation."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"unknown-outcome-call","title":"write_remote","kind":"other","status":"in_progress","rawInput":{"value":1}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"unknown-outcome-call","status":"failed","content":[{"type":"content","content":{"type":"text","text":"The tool call was interrupted after it was recorded, but no result was durably recorded. Its outcome is unknown. Decide whether to retry from the tool semantics: retry only if the operation is read-only or idempotent; if it may have side effects, first verify external state or ask the user. Do not retry blindly."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","id":2,"result":{"modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Perform one side-effecting remote mutati","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/semantic-checkpoint.snapshot.ts b/examples/acp-agent/tests/semantic-checkpoint.snapshot.ts
deleted file mode 100644
index e43d2ca4d0..0000000000
--- a/examples/acp-agent/tests/semantic-checkpoint.snapshot.ts
+++ /dev/null
@@ -1,129 +0,0 @@
-import { mkdtemp, readFile, rm, writeFile } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { dirname, join } from 'node:path'
-import { fileURLToPath } from 'node:url'
-import { Context } from 'cordis'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import {
-  launchAcpTestAgent,
-  normalizeSessionLog,
-  normalizeStdout,
-  scrubRequestHeaders,
-  type AgentUnderTest,
-  type NormalizeContext,
-} from '@deepseek-ai/dsh-acp-snapshot'
-import { CallId } from '@deepseek-ai/dsh-llm'
-import SessionStore, { SESSION_FORMAT_VERSION, SessionId, type SessionEvent, type SessionHeader } from '@deepseek-ai/dsh-session'
-import SessionPersistenceJsonl from '@deepseek-ai/dsh-session-persistence-jsonl'
-import { describe, expect, it } from 'vitest'
-
-const fixtureDir = join(dirname(fileURLToPath(import.meta.url)), 'semantic-checkpoint-snapshots/tool-outcome-unknown')
-const replayFixture = join(fixtureDir, 'replay.jsonl')
-const replayOverride = join(fixtureDir, 'replay.override.json')
-const stdoutExpected = join(fixtureDir, 'stdout.expected.jsonl')
-const sessionExpected = join(fixtureDir, 'session.expected.jsonl')
-const sessionId = SessionId('semantic-checkpoint-unknown-outcome')
-const refreshing = process.env.DSH_SNAPSHOT === 'refresh'
-
-const agent: AgentUnderTest = {
-  binScript: fileURLToPath(new URL('../../../packages/examples/acp-demo/src/bin.ts', import.meta.url)),
-  configPath: fileURLToPath(new URL('../cordis.yml', import.meta.url)),
-  tsconfigPath: fileURLToPath(new URL('../../../tsconfig.json', import.meta.url)),
-}
-
-async function seedInterruptedSession(root: string, cwd: string): Promise<string> {
-  const ctx = new Context()
-  await ctx.plugin(SessionStore)
-  await ctx.plugin(SessionPersistenceJsonl, { root, compression: 'none' })
-  const meta: SessionHeader = {
-    version: SESSION_FORMAT_VERSION,
-    id: sessionId,
-    createdAt: 1,
-    cwd,
-    delegationDepth: 0,
-  }
-  const events: SessionEvent[] = [
-    { type: 'turn/start', seq: 0, time: 10, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
-    { type: 'user/message', seq: 1, time: 11, data: { content: [{ type: 'text', text: 'Perform one side-effecting remote mutation.' }], source: { kind: 'user' } }, surfaceOp: 'append' },
-    { type: 'step/start', seq: 2, time: 12, data: { turn: 1, step: 1 } },
-    {
-      type: 'assistant/message',
-      seq: 3,
-      time: 13,
-      data: {
-        turn: 1,
-        step: 1,
-        content: [{ type: 'tool-call', id: CallId('unknown-outcome-call'), name: 'write_remote', arguments: '{"value":1}' }],
-        provenance: { provider: 'deepseek', model: 'deepseek-v4-flash' },
-      },
-      surfaceOp: 'append',
-    },
-    {
-      type: 'tool/call',
-      seq: 4,
-      time: 14,
-      data: {
-        turn: 1,
-        step: 1,
-        callId: CallId('unknown-outcome-call'),
-        name: 'write_remote',
-        arguments: '{"value":1}',
-      },
-    },
-  ]
-  try {
-    await ctx.sessionPersistence.create(meta)
-    await ctx.sessionPersistence.append(sessionId, events)
-    const location = ctx.sessionPersistence.locate(meta)
-    if (location === undefined) throw new Error('JSONL backend did not locate the seeded session')
-    return location.path
-  } finally {
-    await ctx.fiber.dispose()
-  }
-}
-
-describe('semantic checkpoint recovery snapshot', () => {
-  it('loads an unknown tool outcome and carries retry-risk guidance into the next model turn', async () => {
-    const cwd = await mkdtemp(join(tmpdir(), 'dsh-semantic-snapshot-cwd-'))
-    const sessionsRoot = await mkdtemp(join(tmpdir(), 'dsh-semantic-snapshot-sessions-'))
-    let launched: ReturnType<typeof launchAcpTestAgent> | undefined
-    try {
-      const sessionPath = await seedInterruptedSession(sessionsRoot, cwd)
-      launched = launchAcpTestAgent({
-        agent,
-        cwd,
-        env: {
-          DSH_SNAPSHOT: 'replay',
-          DSH_SNAPSHOT_FILE: replayFixture,
-          DSH_SNAPSHOT_OVERRIDE: replayOverride,
-          DSH_SNAPSHOT_SESSIONS_ROOT: sessionsRoot,
-        },
-      })
-      await launched.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-      await launched.client.loadSession({ sessionId, cwd, mcpServers: [] })
-      await launched.client.prompt({
-        sessionId,
-        prompt: [{ type: 'text', text: 'Continue safely from the interrupted operation.' }],
-      })
-      await launched.close()
-
-      const normalization: NormalizeContext = { sessionIds: [sessionId], cwd }
-      const stdout = normalizeStdout(launched.rawStdout(), normalization)
-      const session = scrubRequestHeaders(normalizeSessionLog(await readFile(sessionPath, 'utf8'), normalization))
-      if (refreshing) {
-        await writeFile(stdoutExpected, stdout)
-        await writeFile(sessionExpected, session)
-      }
-      expect(stdout).toBe(await readFile(stdoutExpected, 'utf8'))
-      expect(session).toBe(await readFile(sessionExpected, 'utf8'))
-      expect(session).toContain('TOOL_OUTCOME_UNKNOWN')
-      expect(session).toContain('Do not retry blindly.')
-    } finally {
-      await launched?.close('SIGKILL').catch(() => undefined)
-      await Promise.all([
-        rm(cwd, { recursive: true, force: true }),
-        rm(sessionsRoot, { recursive: true, force: true }),
-      ])
-    }
-  })
-})
diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/stdout.expected.jsonl
index 7c0fe5cd9c..9ba3346933 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/stdout.expected.jsonl
@@ -1,16 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Run this advanced flow exactly","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"advanced-mount","title":"Mount plugin into live cordis runtime","kind":"execute","status":"in_progress","rawInput":{"code":"return { name: 'snapshot-marker', apply() {} }"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"advanced-mount","status":"completed","content":[{"type":"content","content":{"type":"text","text":"mounted dyn-1 (plugin \"snapshot-marker\", state: active)"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"advanced-code","title":"return await tools.cordis_inspect({ what: 'dynamic' })","kind":"execute","status":"in_progress","rawInput":"return await tools.cordis_inspect({ what: 'dynamic' })"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"advanced-code","status":"completed","content":[{"type":"content","content":{"type":"text","text":"## dynamic\n- dyn-1: snapshot-marker [active]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"advanced-direct-child","title":"subagent","kind":"other","status":"in_progress","rawInput":{"description":"Check direct child","prompt":"Reply with exactly DIRECT_CHILD_OK and nothing else."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"advanced-direct-child","status":"completed","content":[{"type":"content","content":{"type":"text","text":"DIRECT_CHILD_OK"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"advanced-workflow","title":"workflow: advanced-acp-snapshot","kind":"other","status":"in_progress","rawInput":"phase('Delegate')\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\nreturn { reply }"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"advanced-workflow","status":"completed","content":[{"type":"content","content":{"type":"text","text":"workflow \"advanced-acp-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"advanced-unmount","title":"Unmount dyn-1","kind":"delete","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"advanced-unmount","status":"completed","content":[{"type":"content","content":{"type":"text","text":"unmounted dyn-1 (plugin \"snapshot-marker\")"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ADVANCED_ACP_OK"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/advanced-toolchain/system-prompt.expected.md
index 73c31413bf..fde52770d5 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/system-prompt.expected.md
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/system-prompt.expected.md
@@ -39,27 +39,6 @@ The available tools:
 type JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }
 
 interface ToolArgsMap {
-  /** Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer. */
-  ask_user_question: {
-    /** Questions to ask the user before continuing. */
-    questions: ({
-      /** Stable id for this question; echoed in the answer. */
-      id: string;
-      /** The specific question to ask the user. */
-      question: string;
-      /** Optional short heading for the question, such as "Confirm" or "Choose Mode". */
-      header?: string;
-      /** Optional choices to show the user. If you recommend one, put it first and append "(Recommended)" to that label. */
-      options?: ({
-        /** Short user-facing option label. */
-        label: string;
-        /** One sentence explaining the tradeoff or impact. */
-        description?: string;
-      } & Record<string, JsonValue>)[];
-      /** Whether the user may select more than one option. Defaults to false. */
-      multi_select?: boolean;
-    } & Record<string, JsonValue>)[];
-  } & Record<string, JsonValue>;
   /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later. */
   bash: {
     /** The bash command to execute. */
@@ -116,11 +95,6 @@ interface ToolArgsMap {
     /** Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access. */
     justification?: string;
   } & Record<string, JsonValue>;
-  /** Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again. */
-  exit_plan_mode: {
-    /** The complete plan, as markdown, starting with a # heading that names it. */
-    plan: string;
-  } & Record<string, JsonValue>;
   /** Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal. */
   get_goal: Record<string, JsonValue>;
   /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */
@@ -246,13 +220,6 @@ interface ToolArgsMap {
 }
 
 interface ToolOutputMap {
-  ask_user_question: {
-    answers: {
-      id: string;
-      selected: string[];
-      custom?: string;
-    }[];
-  };
   bash: {
     kind: "background";
     taskId: string;
@@ -314,9 +281,6 @@ interface ToolOutputMap {
     before: string;
     after: string;
   };
-  exit_plan_mode: {
-    approved: true;
-  };
   get_goal: {
     goal: null;
   } | {
diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/advanced-toolchain/tool-schemas.expected.json
index 6b50a5d220..73b9176478 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -227,22 +164,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl b/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
index eb4488858e..833ed36355 100644
--- a/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
@@ -11,7 +11,7 @@
 {"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
 {"type":"assistant/message","seq":10,"time":0,"data":{"turn":1,"step":1,"content":[{"type":"tool-call","id":"call_spill","name":"bash","arguments":"{\"command\":\"node -e \\\"process.stdout.write('SPILL_START-' + 'x'.repeat(2000) + '-SPILL_END')\\\"\",\"description\":\"Print large deterministic output\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[5,6,7,8,9],"surfaceOp":"append"}
 {"type":"tool/call","seq":11,"time":0,"data":{"turn":1,"step":1,"callId":"call_spill","name":"bash","arguments":"{\"command\":\"node -e \\\"process.stdout.write('SPILL_START-' + 'x'.repeat(2000) + '-SPILL_END')\\\"\",\"description\":\"Print large deterministic output\"}"}}
-{"type":"tool/result","seq":12,"time":0,"data":{"turn":1,"step":1,"callId":"call_spill","content":[{"type":"text","text":"SPILL_START-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-SPILL_END\n\n(Omitted 1417 bytes. Full formatted result stored at: /tmp/dsh-acp-snap-ee77dff02/session-fbfcf2f560a0/1bddd2b64176-bash.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false},"sourceEventSeqs":[11],"surfaceOp":"append"}
+{"type":"tool/result","seq":12,"time":0,"data":{"turn":1,"step":1,"callId":"call_spill","content":[{"type":"text","text":"SPILL_START-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-SPILL_END\n\n(Omitted 1417 bytes. Full formatted result stored at: /tmp/dsh-acp-snap-ee77dff02/session-5747fa727e10/57c2f8c3fbf2-bash.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false},"sourceEventSeqs":[11],"surfaceOp":"append"}
 {"type":"step/end","seq":13,"time":0,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":14,"time":0,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
diff --git a/examples/acp-agent/tests/snapshots/bash-spill/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/bash-spill/stdout.expected.jsonl
index 01a96948ba..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/bash-spill/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/bash-spill/stdout.expected.jsonl
@@ -1,8 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_spill","title":"node -e \"process.stdout.write('SPILL_START-' + 'x'.repeat(2000) + '-SPILL_END')\"","kind":"execute","status":"in_progress","rawInput":"node -e \"process.stdout.write('SPILL_START-' + 'x'.repeat(2000) + '-SPILL_END')\"","content":[{"type":"content","content":{"type":"text","text":"Print large deterministic output"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_spill","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nSPILL_START-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-SPILL_END\n\n(Omitted 1417 bytes. Full formatted result stored at: {{spillLocator:bash.txt}}. Use read with offset/limit, or grep this path to search within it.)\n```"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-terminal-card/input.json b/examples/acp-agent/tests/snapshots/bash-tool-turn/input.json
similarity index 77%
rename from examples/acp-agent/tests/snapshots/fs-terminal-card/input.json
rename to examples/acp-agent/tests/snapshots/bash-tool-turn/input.json
index de9237ea82..086e8fa77c 100644
--- a/examples/acp-agent/tests/snapshots/fs-terminal-card/input.json
+++ b/examples/acp-agent/tests/snapshots/bash-tool-turn/input.json
@@ -1,6 +1,6 @@
 {
   "steps": [
-    { "op": "initialize", "terminalOutput": true },
+    { "op": "initialize" },
     { "op": "newSession" },
     { "op": "prompt", "text": "Use the bash tool to run exactly: echo TERMINAL_OK. Then reply with the single word DONE and stop." }
   ]
diff --git a/examples/acp-agent/tests/snapshots/fs-terminal-card/session.jsonl b/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
similarity index 100%
rename from examples/acp-agent/tests/snapshots/fs-terminal-card/session.jsonl
rename to examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
diff --git a/examples/acp-agent/tests/snapshots/bash-tool-turn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/bash-tool-turn/stdout.expected.jsonl
new file mode 100644
index 0000000000..82ae8907ca
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/bash-tool-turn/stdout.expected.jsonl
@@ -0,0 +1,4 @@
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/both-mode-turn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/both-mode-turn/stdout.expected.jsonl
index 2fb72d7f0b..7b2bc6dff8 100644
--- a/examples/acp-agent/tests/snapshots/both-mode-turn/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/both-mode-turn/stdout.expected.jsonl
@@ -1,64 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Call the run_code tool (NOT","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" execute"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" program"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" calls"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".b"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" B"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OTH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returns"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" its"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_AZFzvUwuC4vAUoICrfke5147","title":"const result = await tools.bash({ command: \"echo BOTH_OK\", description: \"Echo BOTH_OK\" });\nreturn result.stdout.text;","kind":"execute","status":"in_progress","rawInput":"const result = await tools.bash({ command: \"echo BOTH_OK\", description: \"Echo BOTH_OK\" });\nreturn result.stdout.text;"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_AZFzvUwuC4vAUoICrfke5147","status":"completed","content":[{"type":"content","content":{"type":"text","text":"BOTH_OK\n"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"B"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OTH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" only"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"B"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"OTH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_OK"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"BOTH_OK"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/both-mode-turn/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/both-mode-turn/system-prompt.expected.md
index 8744029272..3817b0bc8a 100644
--- a/examples/acp-agent/tests/snapshots/both-mode-turn/system-prompt.expected.md
+++ b/examples/acp-agent/tests/snapshots/both-mode-turn/system-prompt.expected.md
@@ -39,27 +39,6 @@ The available tools:
 type JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }
 
 interface ToolArgsMap {
-  /** Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer. */
-  ask_user_question: {
-    /** Questions to ask the user before continuing. */
-    questions: ({
-      /** Stable id for this question; echoed in the answer. */
-      id: string;
-      /** The specific question to ask the user. */
-      question: string;
-      /** Optional short heading for the question, such as "Confirm" or "Choose Mode". */
-      header?: string;
-      /** Optional choices to show the user. If you recommend one, put it first and append "(Recommended)" to that label. */
-      options?: ({
-        /** Short user-facing option label. */
-        label: string;
-        /** One sentence explaining the tradeoff or impact. */
-        description?: string;
-      } & Record<string, JsonValue>)[];
-      /** Whether the user may select more than one option. Defaults to false. */
-      multi_select?: boolean;
-    } & Record<string, JsonValue>)[];
-  } & Record<string, JsonValue>;
   /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later. */
   bash: {
     /** The bash command to execute. */
@@ -99,11 +78,6 @@ interface ToolArgsMap {
     /** Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access. */
     justification?: string;
   } & Record<string, JsonValue>;
-  /** Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again. */
-  exit_plan_mode: {
-    /** The complete plan, as markdown, starting with a # heading that names it. */
-    plan: string;
-  } & Record<string, JsonValue>;
   /** Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal. */
   get_goal: Record<string, JsonValue>;
   /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */
@@ -229,13 +203,6 @@ interface ToolArgsMap {
 }
 
 interface ToolOutputMap {
-  ask_user_question: {
-    answers: {
-      id: string;
-      selected: string[];
-      custom?: string;
-    }[];
-  };
   bash: {
     kind: "background";
     taskId: string;
@@ -285,9 +252,6 @@ interface ToolOutputMap {
     before: string;
     after: string;
   };
-  exit_plan_mode: {
-    approved: true;
-  };
   get_goal: {
     goal: null;
   } | {
diff --git a/examples/acp-agent/tests/snapshots/both-mode-turn/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/both-mode-turn/tool-schemas.expected.json
index 7ceeec4042..0fc8107917 100644
--- a/examples/acp-agent/tests/snapshots/both-mode-turn/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/both-mode-turn/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -170,22 +107,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/cancel-tool-calls/input.json b/examples/acp-agent/tests/snapshots/cancel-tool-calls/input.json
index 7024820966..3b54337fa4 100644
--- a/examples/acp-agent/tests/snapshots/cancel-tool-calls/input.json
+++ b/examples/acp-agent/tests/snapshots/cancel-tool-calls/input.json
@@ -5,9 +5,7 @@
     {
       "op": "promptAndCancel",
       "text": "Run two shell commands: wait for cancellation, then write skipped.txt.",
-      "afterUpdate": "tool_call",
-      "waitForFile": { "path": "started.txt" },
-      "waitForToolCallUpdate": "call_skipped"
+      "waitForFile": { "path": "started.txt" }
     },
     { "op": "waitForTurnEnd" }
   ]
diff --git a/examples/acp-agent/tests/snapshots/cancel-tool-calls/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/cancel-tool-calls/stdout.expected.jsonl
index 6258693575..cb25d1c6bb 100644
--- a/examples/acp-agent/tests/snapshots/cancel-tool-calls/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel-tool-calls/stdout.expected.jsonl
@@ -1,9 +1,3 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Run two shell commands: wait","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_wait","title":"node -e \"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\"","kind":"execute","status":"in_progress","rawInput":"node -e \"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\"","content":[{"type":"content","content":{"type":"text","text":"Wait until cancellation"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"cancelled"}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_wait","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: command aborted\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_skipped","title":"printf skipped > skipped.txt","kind":"execute","status":"in_progress","rawInput":"printf skipped > skipped.txt","content":[{"type":"content","content":{"type":"text","text":"Write skipped marker"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_skipped","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: tool call aborted before dispatch\n```"}}]}}}
diff --git a/examples/acp-agent/tests/snapshots/cancel/input.json b/examples/acp-agent/tests/snapshots/cancel/input.json
index a2e2fdc5f0..a96b0418c3 100644
--- a/examples/acp-agent/tests/snapshots/cancel/input.json
+++ b/examples/acp-agent/tests/snapshots/cancel/input.json
@@ -2,7 +2,11 @@
   "steps": [
     { "op": "initialize" },
     { "op": "newSession" },
-    { "op": "promptAndCancel", "text": "Start a long task; this turn will be cancelled mid-stream." },
+    {
+      "op": "promptAndCancel",
+      "text": "Start a long task; this turn will be cancelled mid-stream.",
+      "waitForFile": { "path": ".dsh-snapshot-stream-ready" }
+    },
     { "op": "waitForTurnEnd" }
   ]
 }
diff --git a/examples/acp-agent/tests/snapshots/cancel/replay.override.json b/examples/acp-agent/tests/snapshots/cancel/replay.override.json
index 8436b9ca06..3114a72f41 100644
--- a/examples/acp-agent/tests/snapshots/cancel/replay.override.json
+++ b/examples/acp-agent/tests/snapshots/cancel/replay.override.json
@@ -1,3 +1,3 @@
 [
-  { "kind": "hang" }
+  { "kind": "hang", "readyFile": ".dsh-snapshot-stream-ready" }
 ]
diff --git a/examples/acp-agent/tests/snapshots/cancel/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/cancel/stdout.expected.jsonl
index c528122503..cb25d1c6bb 100644
--- a/examples/acp-agent/tests/snapshots/cancel/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel/stdout.expected.jsonl
@@ -1,6 +1,3 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Start a long task; this","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"partial"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"cancelled"}}
diff --git a/examples/acp-agent/tests/snapshots/code-mode-turn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/code-mode-turn/stdout.expected.jsonl
index 85866dd6dc..9ca552c9fd 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-turn/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-turn/stdout.expected.jsonl
@@ -1,572 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Using ONE run_code program: call","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" carefully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instructions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" write"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" program"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Calls"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" -"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Calls"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_T"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WO"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" -"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_T"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WO"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"3"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Inside"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" same"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" program"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"+"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_T"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WO"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"+"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_T"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"WO"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"CODE_ONE+CODE_TWO"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/code-mode-turn/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/code-mode-turn/system-prompt.expected.md
index 8744029272..3817b0bc8a 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-turn/system-prompt.expected.md
+++ b/examples/acp-agent/tests/snapshots/code-mode-turn/system-prompt.expected.md
@@ -39,27 +39,6 @@ The available tools:
 type JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }
 
 interface ToolArgsMap {
-  /** Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer. */
-  ask_user_question: {
-    /** Questions to ask the user before continuing. */
-    questions: ({
-      /** Stable id for this question; echoed in the answer. */
-      id: string;
-      /** The specific question to ask the user. */
-      question: string;
-      /** Optional short heading for the question, such as "Confirm" or "Choose Mode". */
-      header?: string;
-      /** Optional choices to show the user. If you recommend one, put it first and append "(Recommended)" to that label. */
-      options?: ({
-        /** Short user-facing option label. */
-        label: string;
-        /** One sentence explaining the tradeoff or impact. */
-        description?: string;
-      } & Record<string, JsonValue>)[];
-      /** Whether the user may select more than one option. Defaults to false. */
-      multi_select?: boolean;
-    } & Record<string, JsonValue>)[];
-  } & Record<string, JsonValue>;
   /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later. */
   bash: {
     /** The bash command to execute. */
@@ -99,11 +78,6 @@ interface ToolArgsMap {
     /** Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access. */
     justification?: string;
   } & Record<string, JsonValue>;
-  /** Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again. */
-  exit_plan_mode: {
-    /** The complete plan, as markdown, starting with a # heading that names it. */
-    plan: string;
-  } & Record<string, JsonValue>;
   /** Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal. */
   get_goal: Record<string, JsonValue>;
   /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */
@@ -229,13 +203,6 @@ interface ToolArgsMap {
 }
 
 interface ToolOutputMap {
-  ask_user_question: {
-    answers: {
-      id: string;
-      selected: string[];
-      custom?: string;
-    }[];
-  };
   bash: {
     kind: "background";
     taskId: string;
@@ -285,9 +252,6 @@ interface ToolOutputMap {
     before: string;
     after: string;
   };
-  exit_plan_mode: {
-    approved: true;
-  };
   get_goal: {
     goal: null;
   } | {
diff --git a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/stdout.expected.jsonl
index c881517f8b..f9a0416af5 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/stdout.expected.jsonl
@@ -1,139 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Using ONE run_code program, call","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" write"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" program"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reads"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" called"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" nested"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"/t"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ask"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" answer"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" hand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"shake"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" question"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" based"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" on"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" what"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'s"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" start"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reading"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_6APApmaKLRDlXKMdIcWL5139","title":"const content = await tools.read({ file_path: \"nested/task.txt\" });\nreturn content.lines.map(line => line.text).join(String.fromCharCode(10));","kind":"execute","status":"in_progress","rawInput":"const content = await tools.read({ file_path: \"nested/task.txt\" });\nreturn content.lines.map(line => line.text).join(String.fromCharCode(10));"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_6APApmaKLRDlXKMdIcWL5139","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Touch this file to discover the nested workspace instruction."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" nested"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"/t"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ask"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" told"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Touch"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" discover"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" nested"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" workspace"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instruction"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" nested"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"/"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AG"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ENTS"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".md"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instructions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" say"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"When"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" for"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Mode"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" workspace"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" hand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"shake"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" answer"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_M"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_CONT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"EXT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" nothing"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" else"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".\"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"So"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" answer"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" hand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"shake"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" question"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_M"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_CONT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"EXT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" **"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"Code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" Mode"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" workspace"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" hand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"shake"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"**"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"CODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_M"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ODE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_CONT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"EXT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"`"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The **Code Mode workspace handshake** is: `CODE_MODE_CONTEXT_OK`"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/system-prompt.expected.md
index 8744029272..3817b0bc8a 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/system-prompt.expected.md
+++ b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/system-prompt.expected.md
@@ -39,27 +39,6 @@ The available tools:
 type JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }
 
 interface ToolArgsMap {
-  /** Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer. */
-  ask_user_question: {
-    /** Questions to ask the user before continuing. */
-    questions: ({
-      /** Stable id for this question; echoed in the answer. */
-      id: string;
-      /** The specific question to ask the user. */
-      question: string;
-      /** Optional short heading for the question, such as "Confirm" or "Choose Mode". */
-      header?: string;
-      /** Optional choices to show the user. If you recommend one, put it first and append "(Recommended)" to that label. */
-      options?: ({
-        /** Short user-facing option label. */
-        label: string;
-        /** One sentence explaining the tradeoff or impact. */
-        description?: string;
-      } & Record<string, JsonValue>)[];
-      /** Whether the user may select more than one option. Defaults to false. */
-      multi_select?: boolean;
-    } & Record<string, JsonValue>)[];
-  } & Record<string, JsonValue>;
   /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later. */
   bash: {
     /** The bash command to execute. */
@@ -99,11 +78,6 @@ interface ToolArgsMap {
     /** Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access. */
     justification?: string;
   } & Record<string, JsonValue>;
-  /** Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again. */
-  exit_plan_mode: {
-    /** The complete plan, as markdown, starting with a # heading that names it. */
-    plan: string;
-  } & Record<string, JsonValue>;
   /** Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal. */
   get_goal: Record<string, JsonValue>;
   /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */
@@ -229,13 +203,6 @@ interface ToolArgsMap {
 }
 
 interface ToolOutputMap {
-  ask_user_question: {
-    answers: {
-      id: string;
-      selected: string[];
-      custom?: string;
-    }[];
-  };
   bash: {
     kind: "background";
     taskId: string;
@@ -285,9 +252,6 @@ interface ToolOutputMap {
     before: string;
     after: string;
   };
-  exit_plan_mode: {
-    approved: true;
-  };
   get_goal: {
     goal: null;
   } | {
diff --git a/examples/acp-agent/tests/snapshots/config-options/input.json b/examples/acp-agent/tests/snapshots/config-options/input.json
deleted file mode 100644
index 900367cea8..0000000000
--- a/examples/acp-agent/tests/snapshots/config-options/input.json
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  "steps": [
-    {
-      "op": "initialize"
-    },
-    {
-      "op": "newSession"
-    },
-    {
-      "op": "setConfigOption",
-      "configId": "permission",
-      "value": "workspace-write"
-    },
-    {
-      "op": "setConfigOption",
-      "configId": "permission",
-      "value": "danger-full-access"
-    },
-    {
-      "op": "setConfigOptionExpectError",
-      "configId": "permission",
-      "value": "plan"
-    },
-    {
-      "op": "setConfigOptionExpectError",
-      "configId": "reasoning-effort",
-      "value": "max"
-    }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/config-options/session.jsonl b/examples/acp-agent/tests/snapshots/config-options/session.jsonl
deleted file mode 100644
index 63f2775383..0000000000
--- a/examples/acp-agent/tests/snapshots/config-options/session.jsonl
+++ /dev/null
@@ -1 +0,0 @@
-{"type":"session","version":0,"id":"00000000-0000-0000-0000-000000000000","createdAt":0,"delegationDepth":0}
diff --git a/examples/acp-agent/tests/snapshots/config-options/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/config-options/stdout.expected.jsonl
deleted file mode 100644
index 53ad812adb..0000000000
--- a/examples/acp-agent/tests/snapshots/config-options/stdout.expected.jsonl
+++ /dev/null
@@ -1,7 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","id":3,"result":{"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"workspace-write","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","id":4,"result":{"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","id":5,"error":{"code":-32602,"message":"Invalid params: unknown permission value \"plan\""}}
-{"jsonrpc":"2.0","id":6,"error":{"code":-32602,"message":"Invalid params: unknown config option \"reasoning-effort\""}}
diff --git a/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.jsonl
index 723a7c077d..eff1b66bf3 100644
--- a/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.jsonl
@@ -1,10 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Inspect the exact tools service","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"inspect-tools-api","title":"Inspect cordis runtime: api: tools","kind":"read","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"inspect-tools-api","status":"completed","content":[{"type":"content","content":{"type":"text","text":"## api\n- tools — Tool registry and execution pipeline.\n    /**\n     * Register globally or in the calling agent scope. Scoped tools shadow\n     * globals; duplicates within one layer and the reserved `run_code` name fail.\n     * @param definition - tool schema, execution, and optional finalization/presentation callbacks.\n     * @returns the exact disposer that unregisters the tool.\n     */\n    register(definition: ToolDefinition): () => void\n    /**\n     * Restrict global tools for the calling agent scope. Empty filters, unknown\n     * names, scope-local names, and reserved transport names fail. Restrictions\n     * intersect; scoped registrations remain visible.\n     * @param filter - global-surface mask: `allow` (keep only) and/or `deny` (remove).\n     * @returns the exact disposer that lifts this restriction.\n     */\n    restrict(filter: ToolRestriction): () => void\n    /**\n     * Register a monotonic guard after the extensible `tools/pre-execute`\n     * waterfall. A plain-context guard applies globally; one registered through\n     * `agent.ctx` applies only to that agent. Any matching guard may deny by\n     * returning a reason, while no guard can force-allow a call another guard\n     * denied. The exact effect disposer is returned for ordered ownership and\n     * HMR cleanup.\n     * @param guard - synchronous check; a returned string denies the execution.\n     * @returns the exact disposer that unregisters the guard.\n     */\n    guard(guard: ToolGuard): () => void\n    /**\n     * Look up a tool as one scope sees it (scoped\n     * shadows global; a restricted-away global reads as absent). Presenters pass\n     * the calling agent so the rendered card matches the definition that\n     * actually executed.\n     * @param name - the tool name as registered.\n     * @param scope - the viewing scope (the agent); omitted = the global view.\n     * @returns the definition the scope resolves, or undefined when none is visible.\n     */\n    get(name: string, scope?: ScopeKey): ToolDefinition | undefined\n    /**\n     * Project visible definitions onto the allowlisted model-facing schema fields,\n     * excluding execution and presentation callbacks.\n     * @param scope - the viewing scope (the agent); omitted = the global view.\n     * @returns one deep-cloned schema per visible tool.\n     */\n    schemas(scope?: ScopeKey): ToolSchema[]\n    /**\n     * Classify a pending call through the caller's visible tool definition. Only\n     * an exact `true` is parallel; unknown, hidden, undeclared, invalid, or\n     * throwing classifiers are exclusive.\n     * @param exec - call name, parsed arguments, and optional agent scope.\n     * @returns the fail-closed scheduling mode.\n     */\n    executionMode(exec: ToolExecutionInput): ToolExecutionMode\n    /**\n     * Execute through pre-policy, guards, around-dispatch, post-policy,\n     * definition-owned content finalization, and final notification. Tool and\n     * listener failures resolve as materialized error results; an invisible tool\n     * reports `UNKNOWN_TOOL`. The returned outcome is the same lossless, frozen\n     * snapshot final observers receive. Cancellation\n     * arriving after entry and before final result materialization skips a\n     * not-yet-started body with `ABORTED_BEFORE_DISPATCH` or replaces a\n     * successful started outcome with `ABORTED`; already-started work is still\n     * drained and may retain a tool-owned structured error.\n     * @param exec - the typed same-process call input. The registry assigns its\n     *   correlation token before policy begins.\n     * @returns the materialized final result.\n     */\n    async execute(exec: ToolExecutionInput): Promise<ToolExecutionResult>\ntype shapes (referenced by the signatures above — read these before assuming a field is a string):\n    export interface Agent {\n        readonly id: SessionId;\n        readonly options: AgentOptions;\n        readonly session: Session;\n        readonly status: AgentStatus;\n        readonly ctx: Context;\n        send(content: ContentBlock[], options?: SendOptions): void;\n        steer(content: ContentBlock[], options?: SendOptions): void;\n        inject(content: ContentBlock[], options?: InjectOptions): void;\n        cancel(cause?: AgentCancelCause): void;\n        whenIdle(): Promise<void>;\n    }\n    export type AgentCancelCause = {\n        readonly kind: 'user';\n    } | {\n        readonly kind: 'parent';\n    };\n    export interface AgentOptions {\n        provider?: string;\n        model?: string;\n    }\n    export type AgentStatus = 'idle' | 'running' | 'disposed';\n    export type Branded<B extends string> = string & {\n        readonly [BRAND]: B;\n    };\n    export type CallId = Branded<'CallId'>;\n    export interface DiffCallView {\n        card: 'diff';\n        title: string;\n        diffs: FileDiff[];\n        locations?: FileLocation[];\n    }\n    export interface DiffResultView {\n        card: 'diff';\n        title?: string;\n        diffs: FileDiff[];\n    }\n    export interface FileDiff {\n        path: string;\n        oldText: string | null;\n        newText: string;\n    }\n    export interface FileLocation {\n        path: string;\n        line?: number;\n    }\n    export interface GenericCallView {\n        card: 'generic';\n        title: string;\n        kind?: ToolCallKind;\n        rawInput?: unknown;\n        content?: ContentBlock[];\n        locations?: FileLocation[];\n    }\n    export interface GenericResultView {\n        card: 'generic';\n        title?: string;\n        content?: ContentBlock[];\n    }\n    export interface HookContext {\n        content: ContentBlock[];\n        source: MessageSource;\n        placement?: 'separate' | 'prompt-prefix';\n        meta?: JsonValue;\n    }\n    export interface InjectOptions extends Omit<SendOptions, 'contexts'> {\n        meta?: JsonValue;\n    }\n    export interface JsonSchemaNode {\n        type?: JsonSchemaType;\n        oneOf?: JsonSchemaNode[];\n        properties?: Record<string, JsonSchemaNode>;\n        required?: string[];\n        additionalProperties?: boolean;\n        items?: JsonSchemaNode;\n        enum?: JsonSchemaScalar[];\n        const?: JsonSchemaScalar;\n        description?: string;\n        title?: string;\n        default?: JsonValue;\n        examples?: JsonValue;\n    }\n    export type JsonSchemaScalar = string | number | boolean | null;\n    export type JsonSchemaType = 'object' | 'array' | 'string' | 'number' | 'integer' | 'boolean' | 'null';\n    export type JsonValue = null | boolean | number | string | JsonValue[] | {\n        [key: string]: JsonValue;\n    };\n    export type MessageSource = MessageSourceMap[keyof MessageSourceMap];\n    export interface MessageSourceMap {\n        user: {\n            kind: 'user';\n        };\n        plugin: {\n            kind: 'plugin';\n            plugin: string;\n        };\n    }\n    export type ScopeKey = object;\n    export interface SendOptions {\n        source?: MessageSource;\n        contexts?: HookContext[];\n    }\n    export type SessionId = Branded<'SessionId'>;\n    export interface TerminalCallView {\n        card: 'terminal';\n        title: string;\n        description?: string;\n        cwd?: string;\n    }\n    export interface TerminalResultView {\n        card: 'terminal';\n        title?: string;\n        output?: string;\n        exitCode?: number;\n        signal?: string;\n    }\n    export type ToolCallKind = 'read' | 'edit' | 'delete' | 'move' | 'search' | 'execute' | 'fetch' | 'other';\n    export type ToolCallView = GenericCallView | TerminalCallView | DiffCallView;\n    export interface ToolDefinition extends ToolSchema {\n        readonly output: ToolOutputDefinition;\n        execute(args: unknown, exec: ToolRunContext): Promise<unknown>;\n        finalizeContent?(exec: Readonly<ToolExecution>, result: Readonly<ToolExecutionResult>): ContentBlock[] | undefined;\n        timeoutMs?: number;\n        isConcurrencySafe?(args: unknown): boolean;\n        presentCall?(args: unknown): ToolCallView | undefined;\n        presentResult?(args: unknown, result: ToolResult): ToolResultView | undefined;\n    }\n    export interface ToolErrorInfo {\n        name: string;\n        code: string;\n    }\n    export interface ToolExecution extends ToolExecutionInput {\n        readonly token: ToolExecutionToken;\n    }\n    export interface ToolExecutionFailure {\n        readonly isError: true;\n        readonly error: ToolFailure;\n        readonly value?: never;\n        readonly content: ContentBlock[];\n        readonly meta?: JsonValue;\n        readonly additionalContexts?: HookContext[];\n    }\n    export interface ToolExecutionInput {\n        readonly callId: CallId;\n        readonly name: string;\n        readonly arguments: unknown;\n        readonly agent?: Agent;\n        readonly parent?: ToolExecutionToken;\n        readonly signal: AbortSignal;\n    }\n    export type ToolExecutionMode = {\n        kind: 'parallel';\n    } | {\n        kind: 'exclusive';\n    };\n    export type ToolExecutionResult = ToolExecutionSuccess | ToolExecutionFailure;\n    export interface ToolExecutionSuccess {\n        readonly isError: false;\n        readonly value: JsonValue;\n        readonly content: ContentBlock[];\n        readonly error?: never;\n        readonly meta?: JsonValue;\n        readonly additionalContexts?: HookContext[];\n    }\n    export type ToolExecutionToken = symbol & {\n        readonly [toolExecutionTokenBrand]: true;\n    };\n    export interface ToolFailure {\n        message: string;\n        info?: ToolErrorInfo;\n    }\n    export type ToolGuard = (execution: Readonly<ToolExecution>) => string | undefined;\n    export interface ToolOutputDefinition {\n        readonly schema: JsonSchemaNode;\n        render(args: unknown, value: JsonValue): ContentBlock[];\n        presentationMeta?(args: unknown, value: JsonValue): JsonValue;\n    }\n    export interface ToolRestriction {\n        readonly allow?: readonly string[];\n        readonly deny?: readonly string[];\n    }\n    export interface ToolResult {\n        content: ContentBlock[];\n        isError: boolean;\n        meta?: JsonValue;\n    }\n    export type ToolResultView = GenericResultView | TerminalResultView | DiffResultView;\n    export interface ToolRunContext extends ToolExecution {\n        deferContext(context: HookContext): void;\n    }\n    export interface ToolSchema {\n        name: string;\n        description: string;\n        parameters: Record<string, unknown>;\n    }"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"inspect-tools-event","title":"Inspect cordis runtime: events: tools/pre-execute","kind":"read","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"inspect-tools-event","status":"completed","content":[{"type":"content","content":{"type":"text","text":"## events\n- tools/pre-execute [waterfall] — Allow, deny, or ask before dispatch.\n    /**\n     * Allow, deny, or ask before dispatch. `next()` delegates to allow; missing\n     * approval support turns `ask` into denial. Async gates must observe\n     * `exec.signal`; the registry rechecks cancellation after they settle but\n     * never abandons their promise.\n     * Scope-filtered dispatch (`@deepseek-ai/dsh-scope`): agent-scoped listeners receive only that agent's calls.\n     * @param exec - the pending call (name, parsed arguments, caller agent).\n     * @mode waterfall\n     */\n    'tools/pre-execute'(this: Scoped<ToolRegistry>, exec: ToolExecution, next: () => Promise<PreToolDecision>): Promise<PreToolDecision>\nwaterfall listeners receive a trailing next() and MUST call it to delegate — returning without next() vetoes the chain."}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"CORDIS_INSPECT_JSDOC_OK"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/error-finish/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/error-finish/stdout.expected.jsonl
index ecef64b941..4ad17f44e8 100644
--- a/examples/acp-agent/tests/snapshots/error-finish/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/error-finish/stdout.expected.jsonl
@@ -1,6 +1,3 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"This prompt triggers a recorded","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n\n[Model attempt failed; any partial output above is discarded: simulated provider error (HTTP 401)]\n\n"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":3,"error":{"code":-32603,"message":"Internal error: turn failed: simulated provider error (HTTP 401)"}}
diff --git a/examples/acp-agent/tests/snapshots/escalation-approved/input.json b/examples/acp-agent/tests/snapshots/escalation-approved/input.json
index 99f9f8821b..226171ecfc 100644
--- a/examples/acp-agent/tests/snapshots/escalation-approved/input.json
+++ b/examples/acp-agent/tests/snapshots/escalation-approved/input.json
@@ -6,11 +6,6 @@
     {
       "op": "newSession"
     },
-    {
-      "op": "setConfigOption",
-      "configId": "permission",
-      "value": "workspace-write"
-    },
     {
       "op": "prompt",
       "text": "The sandbox already denied writing /tmp/dsh-escalated.txt earlier (it is outside this workspace). Retry it now exactly once: one single bash call with the command printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt, with sandbox_permissions set to danger-full-access and the justification 'the user asked to write a file outside the workspace'. Do not run it without sandbox_permissions first. I will approve the permission prompt. After the result, reply with the single word DONE and stop."
diff --git a/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl b/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
index 4438550b97..0b40bff3f9 100644
--- a/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
@@ -1,189 +1,186 @@
 {"type":"session","version":0,"id":"f3cbd087-fb45-4b32-b0f2-3082d65bfcb4","createdAt":1783860675270,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-cbBLh2","delegationDepth":0}
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-{"type":"permission/preset","seq":1,"time":1783962245380,"data":{"preset":"workspace-write"}}
-{"type":"sandbox/mode","seq":2,"time":1784518116517,"data":{"mode":"workspace-write"}}
-{"type":"approval/policy","seq":3,"time":1783962245380,"data":{"policy":"ask"}}
-{"type":"user/message","seq":4,"time":1783962245380,"data":{"content":[{"type":"text","text":"The sandbox already denied writing /tmp/dsh-escalated.txt earlier (it is outside this workspace). Retry it now exactly once: one single bash call with the command printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt, with sandbox_permissions set to danger-full-access and the justification 'the user asked to write a file outside the workspace'. Do not run it without sandbox_permissions first. I will approve the permission prompt. After the result, reply with the single word DONE and stop."}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1783962245380,"data":{"title":"The sandbox already denied writing","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":6,"time":1783962245382,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":7,"time":1783962245382,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" justified"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" as"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instructed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","title":"printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt","kind":"execute","status":"in_progress","rawInput":"printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt","content":[{"type":"content","content":{"type":"text","text":"Write file outside workspace and verify"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":1,"method":"session/request_permission","params":{"sessionId":"{{sessionId}}","toolCall":{"toolCallId":"call_00_d0sAHpJ9mYOJi0z7KNy30441"},"options":[{"optionId":"allow-once","name":"Allow once","kind":"allow_once"},{"optionId":"reject-once","name":"Reject","kind":"reject_once"}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nescalated\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" succeeded"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" —"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wrote"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ("}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"es"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"cal"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ated"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"),"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" removed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" after"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/escalation-approved/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/escalation-approved/system-prompt.expected.md
new file mode 100644
index 0000000000..e3437ad61a
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/escalation-approved/system-prompt.expected.md
@@ -0,0 +1,24 @@
+You are an AI agent powered by the DeepSeek Harness SDK.
+
+You are a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
+
+Verify your work by running the code or tests. Keep answers brief and factual.
+
+
+Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
+
+Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
+
+Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
+
+Check the [exit code: N] marker on every bash result; investigate failures before moving on.
+
+Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
+
+Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
+
+<!-- dsh-user-approval-policy:ask -->
+
+Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
+
+Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
diff --git a/examples/acp-agent/tests/snapshots/escalation-approved/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/escalation-approved/tool-schemas.expected.json
new file mode 100644
index 0000000000..d4973bfea4
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/escalation-approved/tool-schemas.expected.json
@@ -0,0 +1,473 @@
+{
+  "initial": [
+    {
+      "name": "bash",
+      "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "command": {
+            "type": "string",
+            "description": "The bash command to execute."
+          },
+          "description": {
+            "type": "string",
+            "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
+          },
+          "timeoutMs": {
+            "type": "number",
+            "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
+          },
+          "workdir": {
+            "type": "string",
+            "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
+          },
+          "sandbox_permissions": {
+            "type": "string",
+            "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
+            "enum": [
+              "workspace-write",
+              "danger-full-access"
+            ]
+          },
+          "justification": {
+            "type": "string",
+            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
+          }
+        },
+        "required": [
+          "command",
+          "description"
+        ]
+      }
+    },
+    {
+      "name": "create_goal",
+      "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "objective": {
+            "type": "string",
+            "description": "The concrete completion objective inferred from the direct human request."
+          },
+          "max_goal_rounds": {
+            "type": "number",
+            "description": "Optional positive safe-integer limit on automatic continuation rounds."
+          }
+        },
+        "required": [
+          "objective"
+        ]
+      }
+    },
+    {
+      "name": "edit",
+      "description": "Edit an existing UTF-8 text file by replacing literal text.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "file_path": {
+            "type": "string",
+            "description": "Path to edit, resolved by the filesystem backend."
+          },
+          "old_string": {
+            "type": "string",
+            "description": "Literal text to replace. Must match exactly."
+          },
+          "new_string": {
+            "type": "string",
+            "description": "Literal replacement text. Use an empty string to delete the match."
+          },
+          "replace_all": {
+            "type": "boolean",
+            "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
+          },
+          "sandbox_permissions": {
+            "type": "string",
+            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
+            "enum": [
+              "workspace-write",
+              "danger-full-access"
+            ]
+          },
+          "justification": {
+            "type": "string",
+            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
+          }
+        },
+        "required": [
+          "file_path",
+          "old_string",
+          "new_string"
+        ]
+      }
+    },
+    {
+      "name": "get_goal",
+      "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
+      "parameters": {
+        "type": "object",
+        "properties": {}
+      }
+    },
+    {
+      "name": "ralph",
+      "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "objective": {
+            "type": "string",
+            "description": "The immutable completion objective for every fresh Ralph round."
+          },
+          "maxRounds": {
+            "type": "number",
+            "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
+          }
+        },
+        "required": [
+          "objective"
+        ]
+      }
+    },
+    {
+      "name": "read",
+      "description": "Read a UTF-8 text file and return line-numbered content.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "file_path": {
+            "type": "string",
+            "description": "Path to read, resolved by the filesystem backend."
+          },
+          "offset": {
+            "type": "number",
+            "description": "1-based first line to return. Defaults to 1."
+          },
+          "limit": {
+            "type": "number",
+            "description": "Maximum number of lines to return. Defaults to 2000."
+          }
+        },
+        "required": [
+          "file_path"
+        ]
+      }
+    },
+    {
+      "name": "skill",
+      "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string",
+            "description": "The exact skill name from the available skills list."
+          }
+        },
+        "required": [
+          "name"
+        ]
+      }
+    },
+    {
+      "name": "subagent",
+      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "description": {
+            "type": "string",
+            "description": "A short (3-5 word) description of the delegated task, for display."
+          },
+          "prompt": {
+            "type": "string",
+            "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
+          }
+        },
+        "required": [
+          "description",
+          "prompt"
+        ]
+      }
+    },
+    {
+      "name": "subagent_fork",
+      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "description": {
+            "type": "string",
+            "description": "A short (3-5 word) description of the delegated task, for display."
+          },
+          "prompt": {
+            "type": "string",
+            "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
+          }
+        },
+        "required": [
+          "description",
+          "prompt"
+        ]
+      }
+    },
+    {
+      "name": "task_kill",
+      "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "task_id": {
+            "type": "string",
+            "description": "Task id returned by the tool that started the background work."
+          },
+          "reason": {
+            "type": "string",
+            "description": "Optional short reason, recorded in the log and forwarded to the task."
+          }
+        },
+        "required": [
+          "task_id"
+        ]
+      }
+    },
+    {
+      "name": "task_list",
+      "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
+      "parameters": {
+        "type": "object",
+        "properties": {}
+      }
+    },
+    {
+      "name": "task_output",
+      "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "task_id": {
+            "type": "string",
+            "description": "Task id returned by the tool that started the background work."
+          },
+          "wait": {
+            "type": "boolean",
+            "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
+          },
+          "timeout_ms": {
+            "type": "number",
+            "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
+          }
+        },
+        "required": [
+          "task_id"
+        ]
+      }
+    },
+    {
+      "name": "todo_write",
+      "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "todos": {
+            "type": "array",
+            "description": "The COMPLETE task list, replacing any previous list.",
+            "items": {
+              "type": "object",
+              "additionalProperties": true,
+              "properties": {
+                "content": {
+                  "type": "string",
+                  "description": "What the task is — a short imperative line."
+                },
+                "status": {
+                  "type": "string",
+                  "description": "pending (not started) | in_progress (now) | completed (done).",
+                  "enum": [
+                    "pending",
+                    "in_progress",
+                    "completed"
+                  ]
+                }
+              },
+              "required": [
+                "content",
+                "status"
+              ]
+            }
+          }
+        },
+        "required": [
+          "todos"
+        ]
+      }
+    },
+    {
+      "name": "update_goal",
+      "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "goal_id": {
+            "type": "string",
+            "description": "Exact id returned by get_goal."
+          },
+          "revision": {
+            "type": "number",
+            "description": "Exact positive revision returned by get_goal."
+          },
+          "action": {
+            "type": "string",
+            "description": "edit | pause | resume | complete | blocked",
+            "enum": [
+              "edit",
+              "pause",
+              "resume",
+              "complete",
+              "blocked"
+            ]
+          },
+          "objective": {
+            "type": "string",
+            "description": "Replacement objective; valid only with action edit."
+          },
+          "max_goal_rounds": {
+            "type": "number",
+            "description": "Replacement cap; valid only with action edit."
+          },
+          "blocked_reason": {
+            "type": "string",
+            "description": "Concrete blocking condition; required only with action blocked."
+          }
+        },
+        "required": [
+          "goal_id",
+          "revision",
+          "action"
+        ]
+      }
+    },
+    {
+      "name": "workflow",
+      "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "script": {
+            "type": "string",
+            "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
+          },
+          "meta": {
+            "type": "object",
+            "description": "The workflow identity block (plain JSON — never code).",
+            "additionalProperties": true,
+            "properties": {
+              "name": {
+                "type": "string",
+                "description": "Short kebab-case workflow name."
+              },
+              "description": {
+                "type": "string",
+                "description": "One-line description of what the workflow does."
+              },
+              "whenToUse": {
+                "type": "string",
+                "description": "Optional guidance on when this workflow applies."
+              },
+              "phases": {
+                "type": "array",
+                "description": "Optional phase declarations matched by phase() calls.",
+                "items": {
+                  "type": "object",
+                  "additionalProperties": true,
+                  "properties": {
+                    "title": {
+                      "type": "string",
+                      "description": "The phase title phase() calls match by exact string."
+                    },
+                    "detail": {
+                      "type": "string",
+                      "description": "Optional one-line description of the phase."
+                    },
+                    "provider": {
+                      "type": "string",
+                      "description": "Optional provider override this phase is expected to use."
+                    },
+                    "model": {
+                      "type": "string",
+                      "description": "Optional model override this phase is expected to use."
+                    }
+                  },
+                  "required": [
+                    "title"
+                  ]
+                }
+              }
+            },
+            "required": [
+              "name",
+              "description"
+            ]
+          },
+          "args": {
+            "type": "object",
+            "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
+            "additionalProperties": true
+          }
+        },
+        "required": [
+          "script",
+          "meta"
+        ]
+      }
+    },
+    {
+      "name": "write",
+      "description": "Create or fully replace a UTF-8 text file.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "file_path": {
+            "type": "string",
+            "description": "Path to write, resolved by the filesystem backend."
+          },
+          "content": {
+            "type": "string",
+            "description": "Full UTF-8 text content to write."
+          },
+          "sandbox_permissions": {
+            "type": "string",
+            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
+            "enum": [
+              "workspace-write",
+              "danger-full-access"
+            ]
+          },
+          "justification": {
+            "type": "string",
+            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
+          }
+        },
+        "required": [
+          "file_path",
+          "content"
+        ]
+      }
+    }
+  ],
+  "changes": []
+}
diff --git a/examples/acp-agent/tests/snapshots/escalation-rejected/input.json b/examples/acp-agent/tests/snapshots/escalation-rejected/input.json
index 83b9d8aab5..89218b3e30 100644
--- a/examples/acp-agent/tests/snapshots/escalation-rejected/input.json
+++ b/examples/acp-agent/tests/snapshots/escalation-rejected/input.json
@@ -6,11 +6,6 @@
     {
       "op": "newSession"
     },
-    {
-      "op": "setConfigOption",
-      "configId": "permission",
-      "value": "workspace-write"
-    },
     {
       "op": "prompt",
       "text": "The sandbox already denied writing /tmp/dsh-escalated.txt earlier (it is outside this workspace). Retry it now exactly once: one single bash call with the command printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt, with sandbox_permissions set to danger-full-access and the justification 'the user asked to write a file outside the workspace'. Do not run it without sandbox_permissions first. I will reject the permission prompt; after the rejection, do not retry and do not work around it \u2014 explain in one short sentence and stop."
diff --git a/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl b/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
index eb01e7443e..9ae1899961 100644
--- a/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
@@ -1,216 +1,213 @@
 {"type":"session","version":0,"id":"d692fe7f-7079-4ee4-8b06-f44fd026d4ea","createdAt":1783860679475,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-Hn29Od","delegationDepth":0}
 {"type":"turn/start","seq":0,"time":1783860679476,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"permission/preset","seq":1,"time":1783962246267,"data":{"preset":"workspace-write"}}
-{"type":"sandbox/mode","seq":2,"time":1784518117237,"data":{"mode":"workspace-write"}}
-{"type":"approval/policy","seq":3,"time":1783962246267,"data":{"policy":"ask"}}
-{"type":"user/message","seq":4,"time":1783962246267,"data":{"content":[{"type":"text","text":"The sandbox already denied writing /tmp/dsh-escalated.txt earlier (it is outside this workspace). Retry it now exactly once: one single bash call with the command printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt, with sandbox_permissions set to danger-full-access and the justification 'the user asked to write a file outside the workspace'. Do not run it without sandbox_permissions first. I will reject the permission prompt; after the rejection, do not retry and do not work around it — explain in one short sentence and stop."}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1783962246267,"data":{"title":"The sandbox already denied writing","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":6,"time":1783962246269,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":7,"time":1783962246269,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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+{"type":"assistant/chunk","seq":208,"time":1783860683506,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":209,"time":1784821263315,"data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"The user rejected the escalation. As instructed, I will not retry and will not work around it — just explain in one short sentence and stop."},{"type":"text","text":"The user rejected the permission escalation, so this command cannot be run."}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":69,"outputTokens":45,"cacheReadTokens":1664,"reasoningTokens":30}},"sourceEventSeqs":[159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208],"surfaceOp":"append"}
+{"type":"step/end","seq":210,"time":1784821263321,"data":{"turn":1,"step":2}}
+{"type":"turn/end","seq":211,"time":1784821263321,"data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/escalation-rejected/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/escalation-rejected/stdout.expected.jsonl
index 409bbb57a1..23d260507b 100644
--- a/examples/acp-agent/tests/snapshots/escalation-rejected/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-rejected/stdout.expected.jsonl
@@ -1,101 +1,5 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","id":3,"result":{"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"workspace-write","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"The sandbox already denied writing","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" specific"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"sand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"box"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_per"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"missions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" set"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"danger"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"-full"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"-access"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" specific"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" justification"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" They"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" explicitly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" said"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" NOT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" without"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"box"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_per"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"missions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" first"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" do"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_WB1vnPomi8yr6MlcFKTj7912","title":"printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt","kind":"execute","status":"in_progress","rawInput":"printf 'escalated\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt","content":[{"type":"content","content":{"type":"text","text":"Write to /tmp and verify, then clean up"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":1,"method":"session/request_permission","params":{"sessionId":"{{sessionId}}","toolCall":{"toolCallId":"call_00_WB1vnPomi8yr6MlcFKTj7912"},"options":[{"optionId":"allow-once","name":"Allow once","kind":"allow_once"},{"optionId":"reject-once","name":"Reject","kind":"reject_once"}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_WB1vnPomi8yr6MlcFKTj7912","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: the user rejected escalating this command to \"danger-full-access\"\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" escalation"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" As"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instructed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" will"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" not"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ret"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ry"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" will"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" not"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" work"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" around"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" —"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" explain"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" one"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" short"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sentence"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" permission"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" escalation"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" so"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" cannot"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" be"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The user rejected the permission escalation, so this command cannot be run."}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl b/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
index d0bd2d5bef..bcdd4c7b99 100644
--- a/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
@@ -130,7 +130,7 @@
 {"type":"assistant/chunk","seq":128,"time":1783352087469,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
 {"type":"assistant/message","seq":129,"time":1783352087469,"data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"Now I need to replace \"DEBUG\" with \"RELEASE\" using the edit tool."},{"type":"tool-call","id":"call_00_vOytneZ0XpsLslEEJAxR6398","name":"edit","arguments":"{\"file_path\": \"config.txt\", \"old_string\": \"DEBUG\", \"new_string\": \"RELEASE\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":241,"outputTokens":98,"cacheReadTokens":2816,"reasoningTokens":18}},"sourceEventSeqs":[74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128],"surfaceOp":"append"}
 {"type":"tool/call","seq":130,"time":1783352087469,"data":{"turn":1,"step":2,"callId":"call_00_vOytneZ0XpsLslEEJAxR6398","name":"edit","arguments":"{\"file_path\": \"config.txt\", \"old_string\": \"DEBUG\", \"new_string\": \"RELEASE\"}"}}
-{"type":"tool/result","seq":131,"time":1783352087476,"data":{"turn":1,"step":2,"callId":"call_00_vOytneZ0XpsLslEEJAxR6398","content":[{"type":"text","text":"The file /tmp/acp-snap-cwd-0BxHdV/config.txt has been updated successfully."}],"isError":false,"meta":{"diffs":[{"path":"config.txt","oldText":"mode=DEBUG\nlevel=info","newText":"mode=RELEASE\nlevel=info"}]}},"sourceEventSeqs":[130],"surfaceOp":"append"}
+{"type":"tool/result","seq":131,"time":1783352087476,"data":{"turn":1,"step":2,"callId":"call_00_vOytneZ0XpsLslEEJAxR6398","content":[{"type":"text","text":"The file /private/tmp/acp-snap-cwd-0BxHdV/config.txt has been updated successfully."}],"isError":false,"meta":{"diffs":[{"path":"config.txt","oldText":"mode=DEBUG\nlevel=info","newText":"mode=RELEASE\nlevel=info"}]}},"sourceEventSeqs":[130],"surfaceOp":"append"}
 {"type":"step/end","seq":132,"time":1783352087477,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":133,"time":1783352087477,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":134,"time":1783352088286,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
diff --git a/examples/acp-agent/tests/snapshots/fs-edit/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-edit/stdout.expected.jsonl
index b589e427d0..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/fs-edit/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-edit/stdout.expected.jsonl
@@ -1,89 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
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diff --git a/examples/acp-agent/tests/snapshots/fs-escalation-approved/input.json b/examples/acp-agent/tests/snapshots/fs-escalation-approved/input.json
index d6d8d2b8c6..c39c10d94d 100644
--- a/examples/acp-agent/tests/snapshots/fs-escalation-approved/input.json
+++ b/examples/acp-agent/tests/snapshots/fs-escalation-approved/input.json
@@ -2,7 +2,6 @@
   "steps": [
     { "op": "initialize" },
     { "op": "newSession" },
-    { "op": "setConfigOption", "configId": "permission", "value": "workspace-write" },
     { "op": "prompt", "text": "Use the write tool (NOT bash) to create escalated.md in the current directory containing exactly the single line: escalated. An equivalent write was denied earlier, so make this one single write call with sandbox_permissions set to danger-full-access and the justification 'the user asked to escalate this write'. Do not call write without sandbox_permissions first. I will approve the permission prompt. After the result, reply with exactly the single word DONE." }
   ],
   "permissionAnswers": [
diff --git a/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl b/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
index 918b3ab4d5..c4475818b8 100644
--- a/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
@@ -1,128 +1,125 @@
 {"type":"session","version":0,"id":"977a4820-f609-4b48-9039-adcdd921c5fe","createdAt":1784045702340,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-vmEGzd","delegationDepth":0}
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-{"type":"sandbox/mode","seq":2,"time":1784045702343,"data":{"mode":"workspace-write"}}
-{"type":"approval/policy","seq":3,"time":1784045702343,"data":{"policy":"ask"}}
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diff --git a/examples/acp-agent/tests/snapshots/fs-escalation-approved/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-escalation-approved/stdout.expected.jsonl
index 6f5783b6ad..c8a50f539b 100644
--- a/examples/acp-agent/tests/snapshots/fs-escalation-approved/stdout.expected.jsonl
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" create"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" write"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sand"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"box"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_per"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"missions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" do"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_Fnymmavpr4klMDy4Fdej3227","title":"Write escalated.md","kind":"edit","status":"in_progress","locations":[{"path":"escalated.md"}],"content":[{"type":"diff","path":"escalated.md","oldText":null,"newText":"escalated"}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":1,"method":"session/request_permission","params":{"sessionId":"{{sessionId}}","toolCall":{"toolCallId":"call_00_Fnymmavpr4klMDy4Fdej3227"},"options":[{"optionId":"allow-once","name":"Allow once","kind":"allow_once"},{"optionId":"reject-once","name":"Reject","kind":"reject_once"}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_Fnymmavpr4klMDy4Fdej3227","status":"completed","content":[{"type":"diff","path":"escalated.md","oldText":null,"newText":"escalated"}],"title":"Write escalated.md"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" was"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" created"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl b/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
index 8f97feff04..25c57ee964 100644
--- a/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
@@ -78,7 +78,7 @@
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 {"type":"tool/call","seq":78,"time":1783611703972,"data":{"turn":1,"step":1,"callId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","name":"edit","arguments":"{\"file_path\": \"settings.txt\", \"old_string\": \"blue\", \"new_string\": \"green\"}"}}
-{"type":"tool/result","seq":79,"time":1783611703978,"data":{"turn":1,"step":1,"callId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","content":[{"type":"text","text":"Error: edit requires reading \"/var/folders/2c/psb0_fmx7hbgz558xjt_f0l00000gn/T/acp-snap-cwd-QzoqnB/settings.txt\" first"}],"isError":true,"error":{"name":"FsError","code":"FS_NOT_OBSERVED"}},"sourceEventSeqs":[78],"surfaceOp":"append"}
+{"type":"tool/result","seq":79,"time":1783611703978,"data":{"turn":1,"step":1,"callId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","content":[{"type":"text","text":"Error: edit requires reading \"/private/var/folders/2c/psb0_fmx7hbgz558xjt_f0l00000gn/T/acp-snap-cwd-QzoqnB/settings.txt\" first"}],"isError":true,"error":{"name":"FsError","code":"FS_NOT_OBSERVED"}},"sourceEventSeqs":[78],"surfaceOp":"append"}
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@@ -226,7 +226,7 @@
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-{"type":"tool/result","seq":227,"time":1783611707114,"data":{"turn":1,"step":3,"callId":"call_00_GVknJu2tksKkP4lALCwh0926","content":[{"type":"text","text":"The file /var/folders/2c/psb0_fmx7hbgz558xjt_f0l00000gn/T/acp-snap-cwd-QzoqnB/settings.txt has been updated successfully."}],"isError":false,"meta":{"diffs":[{"path":"settings.txt","oldText":"color: blue","newText":"color: green"}]}},"sourceEventSeqs":[226],"surfaceOp":"append"}
+{"type":"tool/result","seq":227,"time":1783611707114,"data":{"turn":1,"step":3,"callId":"call_00_GVknJu2tksKkP4lALCwh0926","content":[{"type":"text","text":"The file /private/var/folders/2c/psb0_fmx7hbgz558xjt_f0l00000gn/T/acp-snap-cwd-QzoqnB/settings.txt has been updated successfully."}],"isError":false,"meta":{"diffs":[{"path":"settings.txt","oldText":"color: blue","newText":"color: green"}]}},"sourceEventSeqs":[226],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/fs-policy-reject/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-policy-reject/stdout.expected.jsonl
index 49a6f6db55..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/fs-policy-reject/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-policy-reject/stdout.expected.jsonl
@@ -1,150 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Do NOT use the read","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" replace"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"blue"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"green"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" settings"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" first"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","title":"Edit settings.txt","kind":"edit","status":"in_progress","locations":[{"path":"settings.txt"}],"content":[{"type":"diff","path":"settings.txt","oldText":"blue","newText":"green"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","status":"failed","content":[{"type":"content","content":{"type":"text","text":"Error: edit requires reading \"{{cwd}}/settings.txt\" first"}}]}}}
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diff --git a/examples/acp-agent/tests/snapshots/fs-read-window/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-read-window/stdout.expected.jsonl
index 0a32a44362..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/fs-read-window/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-read-window/stdout.expected.jsonl
@@ -1,92 +1,4 @@
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_GIZwZS9a7vhWTFCIc7Z35497","title":"Read big.txt (5 - 8)","kind":"read","status":"in_progress","locations":[{"path":"big.txt","line":5}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_GIZwZS9a7vhWTFCIc7Z35497","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/big.txt</path>\n<type>file</type>\n<content>\n5: line five\n6: line six\n7: line seven\n8: line eight\n\n(Showing lines 5-8 of 10. Use offset=9 to continue.)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returned"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" lines"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"5"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"8"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" expected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-read/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-read/stdout.expected.jsonl
index aabd8fe4dc..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/fs-read/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-read/stdout.expected.jsonl
@@ -1,75 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the read tool (NOT","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" greeting"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ("}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"not"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_hHPZCcivsIkXAGS9jTGy8417","title":"Read greeting.txt","kind":"read","status":"in_progress","locations":[{"path":"greeting.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_hHPZCcivsIkXAGS9jTGy8417","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/greeting.txt</path>\n<type>file</type>\n<content>\n1: hello\n\n(End of file - total 1 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-terminal-card/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-terminal-card/stdout.expected.jsonl
deleted file mode 100644
index 0b2343793b..0000000000
--- a/examples/acp-agent/tests/snapshots/fs-terminal-card/stdout.expected.jsonl
+++ /dev/null
@@ -1,49 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","title":"echo TERMINAL_OK","kind":"execute","status":"in_progress","rawInput":"echo TERMINAL_OK","content":[{"type":"content","content":{"type":"text","text":"Echo TERMINAL_OK to verify terminal access"}},{"type":"terminal","terminalId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233"}],"_meta":{"terminal_info":{"terminal_id":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","cwd":"{{cwd}}"}}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","status":"completed","_meta":{"terminal_output":{"terminal_id":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","data":"TERMINAL_OK\n"},"terminal_exit":{"terminal_id":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","exit_code":0}}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ran"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"TER"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"MIN"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" should"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl b/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
index 5a3fc5696b..f3db3493b5 100644
--- a/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
@@ -115,7 +115,7 @@
 {"type":"assistant/chunk","seq":113,"time":1783352094988,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
 {"type":"assistant/message","seq":114,"time":1783352094988,"data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"The file contains \"original contents\". Now I'll replace it with \"replaced\"."},{"type":"tool-call","id":"call_00_N23EvXjDo4c8enyWpIUq4043","name":"write","arguments":"{\"file_path\": \"data.txt\", \"content\": \"replaced\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":228,"outputTokens":79,"cacheReadTokens":2816,"reasoningTokens":17}},"sourceEventSeqs":[70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113],"surfaceOp":"append"}
 {"type":"tool/call","seq":115,"time":1783352094988,"data":{"turn":1,"step":2,"callId":"call_00_N23EvXjDo4c8enyWpIUq4043","name":"write","arguments":"{\"file_path\": \"data.txt\", \"content\": \"replaced\"}"}}
-{"type":"tool/result","seq":116,"time":1783352094995,"data":{"turn":1,"step":2,"callId":"call_00_N23EvXjDo4c8enyWpIUq4043","content":[{"type":"text","text":"<path>/tmp/acp-snap-cwd-hH2sGY/data.txt</path>\n<type>file</type>\n<content>\nUpdated file\n</content>"}],"isError":false,"meta":{"diffs":[{"path":"data.txt","oldText":"original contents","newText":"replaced"}]}},"sourceEventSeqs":[115],"surfaceOp":"append"}
+{"type":"tool/result","seq":116,"time":1783352094995,"data":{"turn":1,"step":2,"callId":"call_00_N23EvXjDo4c8enyWpIUq4043","content":[{"type":"text","text":"<path>/private/tmp/acp-snap-cwd-hH2sGY/data.txt</path>\n<type>file</type>\n<content>\nUpdated file\n</content>"}],"isError":false,"meta":{"diffs":[{"path":"data.txt","oldText":"original contents","newText":"replaced"}]}},"sourceEventSeqs":[115],"surfaceOp":"append"}
 {"type":"step/end","seq":117,"time":1783352094995,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":118,"time":1783352094995,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":119,"time":1783352096090,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
diff --git a/examples/acp-agent/tests/snapshots/fs-write-overwrite/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-write-overwrite/stdout.expected.jsonl
index c1e57a0315..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/fs-write-overwrite/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write-overwrite/stdout.expected.jsonl
@@ -1,86 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"First use the read tool","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" data"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Replace"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" its"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" entire"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" contents"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"re"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"placed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" write"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"3"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_n4eRJuGoxNR07svgNtk82243","title":"Read data.txt","kind":"read","status":"in_progress","locations":[{"path":"data.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_n4eRJuGoxNR07svgNtk82243","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/data.txt</path>\n<type>file</type>\n<content>\n1: original contents\n\n(End of file - total 1 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" contains"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"original"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" contents"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'ll"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" replace"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"re"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"placed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_N23EvXjDo4c8enyWpIUq4043","title":"Write data.txt","kind":"edit","status":"in_progress","locations":[{"path":"data.txt"}],"content":[{"type":"diff","path":"data.txt","oldText":null,"newText":"replaced"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_N23EvXjDo4c8enyWpIUq4043","status":"completed","content":[{"type":"diff","path":"data.txt","oldText":"original contents","newText":"replaced"}],"title":"Write data.txt"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" has"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" been"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" replaced"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/fs-write/session.jsonl b/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
index dbaaf8a8b6..46de5fa221 100644
--- a/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
@@ -63,7 +63,7 @@
 {"type":"assistant/chunk","seq":61,"time":1783352079886,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
 {"type":"assistant/message","seq":62,"time":1783352079888,"data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to create a file named notes.txt with the content \"hello world\" using the write tool, then reply with \"DONE\"."},{"type":"tool-call","id":"call_00_APMUCJJm9lrTSlVbg6dB0185","name":"write","arguments":"{\"file_path\": \"notes.txt\", \"content\": \"hello world\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":2891,"outputTokens":92,"cacheReadTokens":0,"reasoningTokens":30}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61],"surfaceOp":"append"}
 {"type":"tool/call","seq":63,"time":1783352079888,"data":{"turn":1,"step":1,"callId":"call_00_APMUCJJm9lrTSlVbg6dB0185","name":"write","arguments":"{\"file_path\": \"notes.txt\", \"content\": \"hello world\"}"}}
-{"type":"tool/result","seq":64,"time":1783352079897,"data":{"turn":1,"step":1,"callId":"call_00_APMUCJJm9lrTSlVbg6dB0185","content":[{"type":"text","text":"<path>/tmp/acp-snap-cwd-sNvn5N/notes.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false,"meta":{"diffs":[]}},"sourceEventSeqs":[63],"surfaceOp":"append"}
+{"type":"tool/result","seq":64,"time":1783352079897,"data":{"turn":1,"step":1,"callId":"call_00_APMUCJJm9lrTSlVbg6dB0185","content":[{"type":"text","text":"<path>/private/tmp/acp-snap-cwd-sNvn5N/notes.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false,"meta":{"diffs":[]}},"sourceEventSeqs":[63],"surfaceOp":"append"}
 {"type":"step/end","seq":65,"time":1783352079898,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":66,"time":1783352079899,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":67,"time":1783352080825,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
diff --git a/examples/acp-agent/tests/snapshots/fs-write/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/fs-write/stdout.expected.jsonl
index 16f2d39a8d..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/fs-write/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write/stdout.expected.jsonl
@@ -1,56 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the write tool (NOT","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" create"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" named"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" notes"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" content"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" world"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" write"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_APMUCJJm9lrTSlVbg6dB0185","title":"Write notes.txt","kind":"edit","status":"in_progress","locations":[{"path":"notes.txt"}],"content":[{"type":"diff","path":"notes.txt","oldText":null,"newText":"hello world"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_APMUCJJm9lrTSlVbg6dB0185","status":"completed","content":[{"type":"diff","path":"notes.txt","oldText":null,"newText":"hello world"}],"title":"Write notes.txt"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" has"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" been"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" created"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/goal-command-status/input.json b/examples/acp-agent/tests/snapshots/goal-command-status/input.json
deleted file mode 100644
index 0bc0192c93..0000000000
--- a/examples/acp-agent/tests/snapshots/goal-command-status/input.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "steps": [
-    { "op": "initialize" },
-    { "op": "newSession" },
-    { "op": "prompt", "text": "/goal" }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/goal-command-status/session.jsonl b/examples/acp-agent/tests/snapshots/goal-command-status/session.jsonl
deleted file mode 100644
index a6f73319bc..0000000000
--- a/examples/acp-agent/tests/snapshots/goal-command-status/session.jsonl
+++ /dev/null
@@ -1 +0,0 @@
-{"type":"session","version":0,"id":"00000000-0000-0000-0000-000000000000","createdAt":0}
diff --git a/examples/acp-agent/tests/snapshots/goal-command-status/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/goal-command-status/stdout.expected.jsonl
deleted file mode 100644
index 64ef74a717..0000000000
--- a/examples/acp-agent/tests/snapshots/goal-command-status/stdout.expected.jsonl
+++ /dev/null
@@ -1,5 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"No goal is currently set.\nUsage: /goal [<objective>|clear|edit <objective>|pause|resume]"}}}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/handshake/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/handshake/stdout.expected.jsonl
index 42747846b2..a20b86580e 100644
--- a/examples/acp-agent/tests/snapshots/handshake/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/handshake/stdout.expected.jsonl
@@ -1,3 +1,2 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/stdout.expected.jsonl
index 3295477ce5..e42141f739 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/stdout.expected.jsonl
@@ -1,92 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Call the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" If"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'s"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ret"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ry"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" once"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" quote"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" final"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_VAByyMjsct4c7P6k1ysX9256","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Echo HELLO to stdout"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_VAByyMjsct4c7P6k1ysX9256","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\ntool output rejected by policy: retry once\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" first"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" call"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" was"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" said"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ret"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ry"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" once"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ret"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ry"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_tDV4j1p5eAeHTtQhXOfn6856","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Echo HELLO to stdout"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_tDV4j1p5eAeHTtQhXOfn6856","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nHELLO\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" second"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" attempt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" succeeded"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" final"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" final"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The final tool result verbatim:\n\n```\nHELLO\n```"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/stdout.expected.jsonl
index 9e19a80897..da09fe35c3 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/stdout.expected.jsonl
@@ -1,80 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_HbCMzTslWBZTSphWN0z97382","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Run echo HELLO"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_HbCMzTslWBZTSphWN0z97382","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nHELLO\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" was"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" an"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exit"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" of"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" "}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"0"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ("}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"success"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":")."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" was"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"It"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" completed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" exit"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" "}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"0"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"."}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The tool result was:\n\n```\nHELLO\n```\n\nIt completed successfully with exit code 0."}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
index 888f2f5c13..3b86a1c456 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
@@ -56,8 +56,8 @@
 {"type":"tool/call","seq":54,"time":1783352172557,"data":{"turn":1,"step":1,"callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Echo HELLO\"}"}}
 {"type":"hook/invoked","seq":55,"time":1783352172558,"data":{"turn":1,"point":"PreToolUse","dialect":"claude","handlerId":"claude:PreToolUse:1","matcher":"bash"}}
 {"type":"hook/result","seq":56,"time":1783352172573,"data":{"turn":1,"point":"PreToolUse","handlerId":"claude:PreToolUse:1","decision":"ask","exitCode":0,"durationMs":14.113374999999905}}
-{"type":"approval/asked","seq":57,"time":1783962235813,"data":{"id":"97616288-1a5e-4110-a75d-7616a24adcc4","toolName":"bash","callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","reason":"bash requires manual approval in this session"}}
-{"type":"approval/decided","seq":58,"time":1783962235813,"data":{"id":"97616288-1a5e-4110-a75d-7616a24adcc4","outcome":"rejected"}}
+{"type":"approval/asked","seq":57,"time":1783962235813,"data":{"id":"e5dc594b-3ffa-4390-848c-e10b81550c68","toolName":"bash","callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","reason":"bash requires manual approval in this session"}}
+{"type":"approval/decided","seq":58,"time":1783962235813,"data":{"id":"e5dc594b-3ffa-4390-848c-e10b81550c68","outcome":"rejected"}}
 {"type":"tool/result","seq":59,"time":1783962235814,"data":{"turn":1,"step":1,"callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","content":[{"type":"text","text":"Error: the user rejected tool \"bash\""}],"isError":true},"sourceEventSeqs":[54],"surfaceOp":"append"}
 {"type":"step/end","seq":60,"time":1783962235814,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":61,"time":1783962235814,"data":{"turn":1,"step":2}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/stdout.expected.jsonl
index a14e4cafb6..979ff3326b 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/stdout.expected.jsonl
@@ -1,68 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" simple"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_6k0oGSliVHxGSgqBmMEO4311","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Echo HELLO"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_6k0oGSliVHxGSgqBmMEO4311","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: the user rejected tool \"bash\"\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returned"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" an"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" saying"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" requires"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" manual"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" approval"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" session"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'ll"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" got"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"Error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" requires"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" manual"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" approval"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" session"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The tool result I got back verbatim is:\n\n```\nError: bash requires manual approval in this session\n```"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/stdout.expected.jsonl
index 59c21ed411..2bb15b6f03 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/stdout.expected.jsonl
@@ -1,75 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" simple"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_JliP571Bh0QQ8QExbSPk0080","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Run echo HELLO"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_JliP571Bh0QQ8QExbSPk0080","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: bash is disabled by policy in this session\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" returned"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":">"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" Error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" session"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" cannot"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" because"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"."}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The tool returned:\n\n> Error: bash is disabled by policy in this session\n\nI cannot run the command because the bash tool is disabled by policy."}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/stdout.expected.jsonl
index 6a1310e749..cb25d1c6bb 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/stdout.expected.jsonl
@@ -1,4 +1,3 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"cancelled"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/stdout.expected.jsonl
index c700da5011..05c4f9235b 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/stdout.expected.jsonl
@@ -1,26 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"What is my favorite color?","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'s"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" favorite"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" color"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" te"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"al"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" as"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stated"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" context"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" provided"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" plugin"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"te"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"al"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"teal"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/stdout.expected.jsonl
index cb8001573f..0f8f000343 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/stdout.expected.jsonl
@@ -1,44 +1,5 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Reply with the single word","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"FIR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ST"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"FIR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ST"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"SEC"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OND"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"SEC"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"OND"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"FIRST"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"SECOND"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/stdout.expected.jsonl
index 02ddcc549b..d86218d3b7 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/stdout.expected.jsonl
@@ -1,71 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Call the bash tool exactly","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" call"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" once"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`,"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" quote"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_1rmSWHhVchVg7PDTmegT0421","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Echo HELLO to stdout"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_1rmSWHhVchVg7PDTmegT0421","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\ntool output rejected by codex policy: summarize instead\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" was"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"x"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" quote"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" what"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" got"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"<"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":">"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" output"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"x"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" summarize"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" instead"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"</"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":">\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n<tool_result>tool output rejected by codex policy: summarize instead</tool_result>\n```"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/stdout.expected.jsonl
index 18ef664117..567b676605 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/stdout.expected.jsonl
@@ -1,70 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"echo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_Q6wHtakaip2QNfIXaVJY5458","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Run echo HELLO"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_Q6wHtakaip2QNfIXaVJY5458","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nHELLO\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" got"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"That"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'s"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" received"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"HE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"LL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"O"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The tool result I received is:\n\n```\nHELLO\n```"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/stdout.expected.jsonl
index 749e68ec30..6022fd5747 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/stdout.expected.jsonl
@@ -1,72 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" simple"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_tv0SMeLXaTuyuVrOxnV97085","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Run echo HELLO"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_tv0SMeLXaTuyuVrOxnV97085","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: bash is disabled by codex policy in this session\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" session"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" got"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"Error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" code"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"x"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" session"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"```"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The tool result I got back verbatim is:\n\n```\nError: bash is disabled by codex policy in this session\n```"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/stdout.expected.jsonl
index 6a1310e749..cb25d1c6bb 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/stdout.expected.jsonl
@@ -1,4 +1,3 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"cancelled"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/stdout.expected.jsonl
index 2a47058980..05c4f9235b 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/stdout.expected.jsonl
@@ -1,45 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"What is my favorite color?","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" about"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" their"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" favorite"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" color"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" context"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tells"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" they"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" previously"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stated"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'s"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" te"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"al"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" They"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" color"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" without"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" any"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"te"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"al"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"teal"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/stdout.expected.jsonl
index e7b1d906e9..0f8f000343 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/stdout.expected.jsonl
@@ -1,44 +1,5 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Reply with the single word","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"FIR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ST"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"FIR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ST"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"SEC"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OND"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"SEC"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"OND"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"FIRST"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"SECOND"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/lsp-definition/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/lsp-definition/stdout.expected.jsonl
index ea9960c652..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/lsp-definition/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/lsp-definition/stdout.expected.jsonl
@@ -1,8 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the lsp tool exactly","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_lsp_definition","title":"LSP goToDefinition subject.ts:1:7","kind":"search","status":"in_progress","locations":[{"path":"subject.ts","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_lsp_definition","status":"completed","content":[{"type":"content","content":{"type":"text","text":"subject.ts:1:7\n… 1 more location omitted (limit 1)."}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/lsp-definition/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/lsp-definition/tool-schemas.expected.json
index b42a434388..5d27e93da3 100644
--- a/examples/acp-agent/tests/snapshots/lsp-definition/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/lsp-definition/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -170,22 +107,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/model-switching/input.json b/examples/acp-agent/tests/snapshots/model-switching/input.json
deleted file mode 100644
index 3612f367f6..0000000000
--- a/examples/acp-agent/tests/snapshots/model-switching/input.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "steps": [
-    {
-      "op": "initialize"
-    },
-    {
-      "op": "newSession"
-    },
-    {
-      "op": "prompt",
-      "text": "Without using tools, reply with exactly FLASH and stop."
-    },
-    {
-      "op": "setConfigOption",
-      "configId": "model",
-      "value": "[\"deepseek\",\"deepseek-v4-pro\"]"
-    },
-    {
-      "op": "prompt",
-      "text": "Without using tools, reply with exactly PRO and stop."
-    }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/model-switching/session.jsonl b/examples/acp-agent/tests/snapshots/model-switching/session.jsonl
deleted file mode 100644
index 198f77cb21..0000000000
--- a/examples/acp-agent/tests/snapshots/model-switching/session.jsonl
+++ /dev/null
@@ -1,70 +0,0 @@
-{"type":"session","version":0,"id":"622d16ce-0a94-476b-97a4-26dad50b1fbf","createdAt":1784086275585,"cwd":"/var/folders/_g/59jgff8x2gqd39f5vy1wnbfc0000gn/T/acp-snap-cwd-Cwf7Bh","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":1784086275588,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"user/message","seq":1,"time":1784086275588,"data":{"content":[{"type":"text","text":"Without using tools, reply with exactly FLASH and stop."}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"session/title","seq":2,"time":1784086275588,"data":{"title":"Without using tools, reply with","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":3,"time":1784086275590,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":4,"time":1784086275590,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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-{"type":"assistant/chunk","seq":16,"time":1784086276661,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"ASH"}}}
-{"type":"assistant/chunk","seq":17,"time":1784086276661,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"\""}}}
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-{"type":"assistant/chunk","seq":27,"time":1784086276777,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":1,"text":"FL"}}}
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-{"type":"assistant/chunk","seq":29,"time":1784086276778,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with exactly \"FLASH\" and stop, without using any tools."}}}}
-{"type":"assistant/chunk","seq":30,"time":1784086276778,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"FLASH"}}}}
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-{"type":"user/message","seq":37,"time":1784086276812,"data":{"content":[{"type":"text","text":"Without using tools, reply with exactly PRO and stop."}],"source":{"kind":"user"}},"surfaceOp":"append"}
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-{"type":"request/header","seq":39,"time":1784298376621,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-pro"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
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-{"type":"assistant/chunk","seq":64,"time":1784086278495,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3149,"outputTokens":21,"cacheReadTokens":0,"reasoningTokens":19}}}}
-{"type":"assistant/chunk","seq":65,"time":1784086278495,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":66,"time":1784086278495,"data":{"turn":2,"step":1,"content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"PRO\" and stop, without using any tools."},{"type":"text","text":"PRO"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":3149,"outputTokens":21,"cacheReadTokens":0,"reasoningTokens":19}},"sourceEventSeqs":[40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65],"surfaceOp":"append"}
-{"type":"step/end","seq":67,"time":1784086278495,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":68,"time":1784086278495,"data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/model-switching/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/model-switching/stdout.expected.jsonl
deleted file mode 100644
index 85bb5a7137..0000000000
--- a/examples/acp-agent/tests/snapshots/model-switching/stdout.expected.jsonl
+++ /dev/null
@@ -1,49 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Without using tools, reply with","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"FL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ASH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" without"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" any"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"FL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ASH"}}}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
-{"jsonrpc":"2.0","id":4,"result":{"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-pro\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"PRO"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" without"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" any"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PRO"}}}}
-{"jsonrpc":"2.0","id":5,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/model-switching/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/model-switching/system-prompt.expected.md
deleted file mode 100644
index e5f8f35c02..0000000000
--- a/examples/acp-agent/tests/snapshots/model-switching/system-prompt.expected.md
+++ /dev/null
@@ -1,53 +0,0 @@
-You are an AI agent powered by the DeepSeek Harness SDK.
-
-You are a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
-
-Verify your work by running the code or tests. Keep answers brief and factual.
-
-
-Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
-
-Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
-
-Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
-
-Check the [exit code: N] marker on every bash result; investigate failures before moving on.
-
-Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
-
-Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
-
-Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).
-<!-- dsh-user-approval-policy:never -->
-
-Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
-
-Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
-
-<!-- request/header change 1 -->
-
-You are an AI agent powered by the DeepSeek Harness SDK.
-
-You are a coding assistant powered by the deepseek-v4-pro model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
-
-Verify your work by running the code or tests. Keep answers brief and factual.
-
-
-Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
-
-Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
-
-Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
-
-Check the [exit code: N] marker on every bash result; investigate failures before moving on.
-
-Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
-
-Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
-
-Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).
-<!-- dsh-user-approval-policy:never -->
-
-Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
-
-Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
diff --git a/examples/acp-agent/tests/snapshots/model-switching/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/model-switching/tool-schemas.expected.json
deleted file mode 100644
index ef40784fa5..0000000000
--- a/examples/acp-agent/tests/snapshots/model-switching/tool-schemas.expected.json
+++ /dev/null
@@ -1,1102 +0,0 @@
-{
-  "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
-    {
-      "name": "bash",
-      "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "command": {
-            "type": "string",
-            "description": "The bash command to execute."
-          },
-          "description": {
-            "type": "string",
-            "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
-          },
-          "timeoutMs": {
-            "type": "number",
-            "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
-          },
-          "workdir": {
-            "type": "string",
-            "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
-          }
-        },
-        "required": [
-          "command",
-          "description"
-        ]
-      }
-    },
-    {
-      "name": "create_goal",
-      "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "objective": {
-            "type": "string",
-            "description": "The concrete completion objective inferred from the direct human request."
-          },
-          "max_goal_rounds": {
-            "type": "number",
-            "description": "Optional positive safe-integer limit on automatic continuation rounds."
-          }
-        },
-        "required": [
-          "objective"
-        ]
-      }
-    },
-    {
-      "name": "edit",
-      "description": "Edit an existing UTF-8 text file by replacing literal text.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to edit, resolved by the filesystem backend."
-          },
-          "old_string": {
-            "type": "string",
-            "description": "Literal text to replace. Must match exactly."
-          },
-          "new_string": {
-            "type": "string",
-            "description": "Literal replacement text. Use an empty string to delete the match."
-          },
-          "replace_all": {
-            "type": "boolean",
-            "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-          }
-        },
-        "required": [
-          "file_path",
-          "old_string",
-          "new_string"
-        ]
-      }
-    },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
-    {
-      "name": "get_goal",
-      "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
-      "parameters": {
-        "type": "object",
-        "properties": {}
-      }
-    },
-    {
-      "name": "ralph",
-      "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "objective": {
-            "type": "string",
-            "description": "The immutable completion objective for every fresh Ralph round."
-          },
-          "maxRounds": {
-            "type": "number",
-            "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
-          }
-        },
-        "required": [
-          "objective"
-        ]
-      }
-    },
-    {
-      "name": "read",
-      "description": "Read a UTF-8 text file and return line-numbered content.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to read, resolved by the filesystem backend."
-          },
-          "offset": {
-            "type": "number",
-            "description": "1-based first line to return. Defaults to 1."
-          },
-          "limit": {
-            "type": "number",
-            "description": "Maximum number of lines to return. Defaults to 2000."
-          }
-        },
-        "required": [
-          "file_path"
-        ]
-      }
-    },
-    {
-      "name": "skill",
-      "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "name": {
-            "type": "string",
-            "description": "The exact skill name from the available skills list."
-          }
-        },
-        "required": [
-          "name"
-        ]
-      }
-    },
-    {
-      "name": "subagent",
-      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "description": {
-            "type": "string",
-            "description": "A short (3-5 word) description of the delegated task, for display."
-          },
-          "prompt": {
-            "type": "string",
-            "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-          }
-        },
-        "required": [
-          "description",
-          "prompt"
-        ]
-      }
-    },
-    {
-      "name": "subagent_fork",
-      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "description": {
-            "type": "string",
-            "description": "A short (3-5 word) description of the delegated task, for display."
-          },
-          "prompt": {
-            "type": "string",
-            "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-          }
-        },
-        "required": [
-          "description",
-          "prompt"
-        ]
-      }
-    },
-    {
-      "name": "task_kill",
-      "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "task_id": {
-            "type": "string",
-            "description": "Task id returned by the tool that started the background work."
-          },
-          "reason": {
-            "type": "string",
-            "description": "Optional short reason, recorded in the log and forwarded to the task."
-          }
-        },
-        "required": [
-          "task_id"
-        ]
-      }
-    },
-    {
-      "name": "task_list",
-      "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
-      "parameters": {
-        "type": "object",
-        "properties": {}
-      }
-    },
-    {
-      "name": "task_output",
-      "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "task_id": {
-            "type": "string",
-            "description": "Task id returned by the tool that started the background work."
-          },
-          "wait": {
-            "type": "boolean",
-            "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
-          },
-          "timeout_ms": {
-            "type": "number",
-            "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
-          }
-        },
-        "required": [
-          "task_id"
-        ]
-      }
-    },
-    {
-      "name": "todo_write",
-      "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "todos": {
-            "type": "array",
-            "description": "The COMPLETE task list, replacing any previous list.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "content": {
-                  "type": "string",
-                  "description": "What the task is — a short imperative line."
-                },
-                "status": {
-                  "type": "string",
-                  "description": "pending (not started) | in_progress (now) | completed (done).",
-                  "enum": [
-                    "pending",
-                    "in_progress",
-                    "completed"
-                  ]
-                }
-              },
-              "required": [
-                "content",
-                "status"
-              ]
-            }
-          }
-        },
-        "required": [
-          "todos"
-        ]
-      }
-    },
-    {
-      "name": "update_goal",
-      "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "goal_id": {
-            "type": "string",
-            "description": "Exact id returned by get_goal."
-          },
-          "revision": {
-            "type": "number",
-            "description": "Exact positive revision returned by get_goal."
-          },
-          "action": {
-            "type": "string",
-            "description": "edit | pause | resume | complete | blocked",
-            "enum": [
-              "edit",
-              "pause",
-              "resume",
-              "complete",
-              "blocked"
-            ]
-          },
-          "objective": {
-            "type": "string",
-            "description": "Replacement objective; valid only with action edit."
-          },
-          "max_goal_rounds": {
-            "type": "number",
-            "description": "Replacement cap; valid only with action edit."
-          },
-          "blocked_reason": {
-            "type": "string",
-            "description": "Concrete blocking condition; required only with action blocked."
-          }
-        },
-        "required": [
-          "goal_id",
-          "revision",
-          "action"
-        ]
-      }
-    },
-    {
-      "name": "workflow",
-      "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "script": {
-            "type": "string",
-            "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
-          },
-          "meta": {
-            "type": "object",
-            "description": "The workflow identity block (plain JSON — never code).",
-            "additionalProperties": true,
-            "properties": {
-              "name": {
-                "type": "string",
-                "description": "Short kebab-case workflow name."
-              },
-              "description": {
-                "type": "string",
-                "description": "One-line description of what the workflow does."
-              },
-              "whenToUse": {
-                "type": "string",
-                "description": "Optional guidance on when this workflow applies."
-              },
-              "phases": {
-                "type": "array",
-                "description": "Optional phase declarations matched by phase() calls.",
-                "items": {
-                  "type": "object",
-                  "additionalProperties": true,
-                  "properties": {
-                    "title": {
-                      "type": "string",
-                      "description": "The phase title phase() calls match by exact string."
-                    },
-                    "detail": {
-                      "type": "string",
-                      "description": "Optional one-line description of the phase."
-                    },
-                    "provider": {
-                      "type": "string",
-                      "description": "Optional provider override this phase is expected to use."
-                    },
-                    "model": {
-                      "type": "string",
-                      "description": "Optional model override this phase is expected to use."
-                    }
-                  },
-                  "required": [
-                    "title"
-                  ]
-                }
-              }
-            },
-            "required": [
-              "name",
-              "description"
-            ]
-          },
-          "args": {
-            "type": "object",
-            "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
-            "additionalProperties": true
-          }
-        },
-        "required": [
-          "script",
-          "meta"
-        ]
-      }
-    },
-    {
-      "name": "write",
-      "description": "Create or fully replace a UTF-8 text file.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to write, resolved by the filesystem backend."
-          },
-          "content": {
-            "type": "string",
-            "description": "Full UTF-8 text content to write."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-          }
-        },
-        "required": [
-          "file_path",
-          "content"
-        ]
-      }
-    }
-  ],
-  "changes": [
-    [
-      {
-        "name": "ask_user_question",
-        "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "questions": {
-              "type": "array",
-              "description": "Questions to ask the user before continuing.",
-              "items": {
-                "type": "object",
-                "additionalProperties": true,
-                "properties": {
-                  "id": {
-                    "type": "string",
-                    "description": "Stable id for this question; echoed in the answer."
-                  },
-                  "question": {
-                    "type": "string",
-                    "description": "The specific question to ask the user."
-                  },
-                  "header": {
-                    "type": "string",
-                    "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                  },
-                  "options": {
-                    "type": "array",
-                    "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                    "items": {
-                      "type": "object",
-                      "additionalProperties": true,
-                      "properties": {
-                        "label": {
-                          "type": "string",
-                          "description": "Short user-facing option label."
-                        },
-                        "description": {
-                          "type": "string",
-                          "description": "One sentence explaining the tradeoff or impact."
-                        }
-                      },
-                      "required": [
-                        "label"
-                      ]
-                    }
-                  },
-                  "multi_select": {
-                    "type": "boolean",
-                    "description": "Whether the user may select more than one option. Defaults to false."
-                  }
-                },
-                "required": [
-                  "id",
-                  "question"
-                ]
-              }
-            }
-          },
-          "required": [
-            "questions"
-          ]
-        }
-      },
-      {
-        "name": "bash",
-        "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "command": {
-              "type": "string",
-              "description": "The bash command to execute."
-            },
-            "description": {
-              "type": "string",
-              "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
-            },
-            "timeoutMs": {
-              "type": "number",
-              "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
-            },
-            "workdir": {
-              "type": "string",
-              "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
-            }
-          },
-          "required": [
-            "command",
-            "description"
-          ]
-        }
-      },
-      {
-        "name": "create_goal",
-        "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "objective": {
-              "type": "string",
-              "description": "The concrete completion objective inferred from the direct human request."
-            },
-            "max_goal_rounds": {
-              "type": "number",
-              "description": "Optional positive safe-integer limit on automatic continuation rounds."
-            }
-          },
-          "required": [
-            "objective"
-          ]
-        }
-      },
-      {
-        "name": "edit",
-        "description": "Edit an existing UTF-8 text file by replacing literal text.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to edit, resolved by the filesystem backend."
-            },
-            "old_string": {
-              "type": "string",
-              "description": "Literal text to replace. Must match exactly."
-            },
-            "new_string": {
-              "type": "string",
-              "description": "Literal replacement text. Use an empty string to delete the match."
-            },
-            "replace_all": {
-              "type": "boolean",
-              "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-            }
-          },
-          "required": [
-            "file_path",
-            "old_string",
-            "new_string"
-          ]
-        }
-      },
-      {
-        "name": "exit_plan_mode",
-        "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "plan": {
-              "type": "string",
-              "description": "The complete plan, as markdown, starting with a # heading that names it."
-            }
-          },
-          "required": [
-            "plan"
-          ]
-        }
-      },
-      {
-        "name": "get_goal",
-        "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
-        "parameters": {
-          "type": "object",
-          "properties": {}
-        }
-      },
-      {
-        "name": "ralph",
-        "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "objective": {
-              "type": "string",
-              "description": "The immutable completion objective for every fresh Ralph round."
-            },
-            "maxRounds": {
-              "type": "number",
-              "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
-            }
-          },
-          "required": [
-            "objective"
-          ]
-        }
-      },
-      {
-        "name": "read",
-        "description": "Read a UTF-8 text file and return line-numbered content.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to read, resolved by the filesystem backend."
-            },
-            "offset": {
-              "type": "number",
-              "description": "1-based first line to return. Defaults to 1."
-            },
-            "limit": {
-              "type": "number",
-              "description": "Maximum number of lines to return. Defaults to 2000."
-            }
-          },
-          "required": [
-            "file_path"
-          ]
-        }
-      },
-      {
-        "name": "skill",
-        "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "name": {
-              "type": "string",
-              "description": "The exact skill name from the available skills list."
-            }
-          },
-          "required": [
-            "name"
-          ]
-        }
-      },
-      {
-        "name": "subagent",
-        "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "description": {
-              "type": "string",
-              "description": "A short (3-5 word) description of the delegated task, for display."
-            },
-            "prompt": {
-              "type": "string",
-              "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-            }
-          },
-          "required": [
-            "description",
-            "prompt"
-          ]
-        }
-      },
-      {
-        "name": "subagent_fork",
-        "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "description": {
-              "type": "string",
-              "description": "A short (3-5 word) description of the delegated task, for display."
-            },
-            "prompt": {
-              "type": "string",
-              "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-            }
-          },
-          "required": [
-            "description",
-            "prompt"
-          ]
-        }
-      },
-      {
-        "name": "task_kill",
-        "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "task_id": {
-              "type": "string",
-              "description": "Task id returned by the tool that started the background work."
-            },
-            "reason": {
-              "type": "string",
-              "description": "Optional short reason, recorded in the log and forwarded to the task."
-            }
-          },
-          "required": [
-            "task_id"
-          ]
-        }
-      },
-      {
-        "name": "task_list",
-        "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
-        "parameters": {
-          "type": "object",
-          "properties": {}
-        }
-      },
-      {
-        "name": "task_output",
-        "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "task_id": {
-              "type": "string",
-              "description": "Task id returned by the tool that started the background work."
-            },
-            "wait": {
-              "type": "boolean",
-              "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
-            },
-            "timeout_ms": {
-              "type": "number",
-              "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
-            }
-          },
-          "required": [
-            "task_id"
-          ]
-        }
-      },
-      {
-        "name": "todo_write",
-        "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "todos": {
-              "type": "array",
-              "description": "The COMPLETE task list, replacing any previous list.",
-              "items": {
-                "type": "object",
-                "additionalProperties": true,
-                "properties": {
-                  "content": {
-                    "type": "string",
-                    "description": "What the task is — a short imperative line."
-                  },
-                  "status": {
-                    "type": "string",
-                    "description": "pending (not started) | in_progress (now) | completed (done).",
-                    "enum": [
-                      "pending",
-                      "in_progress",
-                      "completed"
-                    ]
-                  }
-                },
-                "required": [
-                  "content",
-                  "status"
-                ]
-              }
-            }
-          },
-          "required": [
-            "todos"
-          ]
-        }
-      },
-      {
-        "name": "update_goal",
-        "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "goal_id": {
-              "type": "string",
-              "description": "Exact id returned by get_goal."
-            },
-            "revision": {
-              "type": "number",
-              "description": "Exact positive revision returned by get_goal."
-            },
-            "action": {
-              "type": "string",
-              "description": "edit | pause | resume | complete | blocked",
-              "enum": [
-                "edit",
-                "pause",
-                "resume",
-                "complete",
-                "blocked"
-              ]
-            },
-            "objective": {
-              "type": "string",
-              "description": "Replacement objective; valid only with action edit."
-            },
-            "max_goal_rounds": {
-              "type": "number",
-              "description": "Replacement cap; valid only with action edit."
-            },
-            "blocked_reason": {
-              "type": "string",
-              "description": "Concrete blocking condition; required only with action blocked."
-            }
-          },
-          "required": [
-            "goal_id",
-            "revision",
-            "action"
-          ]
-        }
-      },
-      {
-        "name": "workflow",
-        "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "script": {
-              "type": "string",
-              "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
-            },
-            "meta": {
-              "type": "object",
-              "description": "The workflow identity block (plain JSON — never code).",
-              "additionalProperties": true,
-              "properties": {
-                "name": {
-                  "type": "string",
-                  "description": "Short kebab-case workflow name."
-                },
-                "description": {
-                  "type": "string",
-                  "description": "One-line description of what the workflow does."
-                },
-                "whenToUse": {
-                  "type": "string",
-                  "description": "Optional guidance on when this workflow applies."
-                },
-                "phases": {
-                  "type": "array",
-                  "description": "Optional phase declarations matched by phase() calls.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "title": {
-                        "type": "string",
-                        "description": "The phase title phase() calls match by exact string."
-                      },
-                      "detail": {
-                        "type": "string",
-                        "description": "Optional one-line description of the phase."
-                      },
-                      "provider": {
-                        "type": "string",
-                        "description": "Optional provider override this phase is expected to use."
-                      },
-                      "model": {
-                        "type": "string",
-                        "description": "Optional model override this phase is expected to use."
-                      }
-                    },
-                    "required": [
-                      "title"
-                    ]
-                  }
-                }
-              },
-              "required": [
-                "name",
-                "description"
-              ]
-            },
-            "args": {
-              "type": "object",
-              "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
-              "additionalProperties": true
-            }
-          },
-          "required": [
-            "script",
-            "meta"
-          ]
-        }
-      },
-      {
-        "name": "write",
-        "description": "Create or fully replace a UTF-8 text file.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to write, resolved by the filesystem backend."
-            },
-            "content": {
-              "type": "string",
-              "description": "Full UTF-8 text content to write."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-            }
-          },
-          "required": [
-            "file_path",
-            "content"
-          ]
-        }
-      }
-    ]
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/modes-advertise/input.json b/examples/acp-agent/tests/snapshots/modes-advertise/input.json
deleted file mode 100644
index 26c56b3425..0000000000
--- a/examples/acp-agent/tests/snapshots/modes-advertise/input.json
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-  "steps": [
-    {
-      "op": "initialize"
-    },
-    {
-      "op": "newSession"
-    },
-    {
-      "op": "setMode",
-      "modeId": "plan"
-    },
-    {
-      "op": "setMode",
-      "modeId": "default"
-    },
-    {
-      "op": "setModeExpectError",
-      "modeId": "yolo"
-    }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/modes-advertise/session.jsonl b/examples/acp-agent/tests/snapshots/modes-advertise/session.jsonl
deleted file mode 100644
index a6f73319bc..0000000000
--- a/examples/acp-agent/tests/snapshots/modes-advertise/session.jsonl
+++ /dev/null
@@ -1 +0,0 @@
-{"type":"session","version":0,"id":"00000000-0000-0000-0000-000000000000","createdAt":0}
diff --git a/examples/acp-agent/tests/snapshots/modes-advertise/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/modes-advertise/stdout.expected.jsonl
deleted file mode 100644
index f7cc8fe1df..0000000000
--- a/examples/acp-agent/tests/snapshots/modes-advertise/stdout.expected.jsonl
+++ /dev/null
@@ -1,8 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"current_mode_update","currentModeId":"plan"}}}
-{"jsonrpc":"2.0","id":3,"result":{}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"current_mode_update","currentModeId":"default"}}}
-{"jsonrpc":"2.0","id":4,"result":{}}
-{"jsonrpc":"2.0","id":5,"error":{"code":-32602,"message":"Invalid params: unknown session mode \"yolo\" — available modes: default, plan"}}
diff --git a/examples/acp-agent/tests/snapshots/multi-turn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/multi-turn/stdout.expected.jsonl
index ea06457e19..52e86a6a94 100644
--- a/examples/acp-agent/tests/snapshots/multi-turn/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/multi-turn/stdout.expected.jsonl
@@ -1,45 +1,6 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Reply with exactly the word:","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" no"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"T"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WO"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" no"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"T"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"WO"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"TWO"}}}}
 {"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/packed-chunks/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/packed-chunks/stdout.expected.jsonl
index 59c21ed411..2bb15b6f03 100644
--- a/examples/acp-agent/tests/snapshots/packed-chunks/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/packed-chunks/stdout.expected.jsonl
@@ -1,75 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" simple"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" result"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_JliP571Bh0QQ8QExbSPk0080","title":"echo HELLO","kind":"execute","status":"in_progress","rawInput":"echo HELLO","content":[{"type":"content","content":{"type":"text","text":"Run echo HELLO"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_JliP571Bh0QQ8QExbSPk0080","status":"failed","content":[{"type":"content","content":{"type":"text","text":"```console\nError: bash is disabled by policy in this session\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" report"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" returned"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":">"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" Error"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" session"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" cannot"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" because"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" disabled"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"."}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"The tool returned:\n\n> Error: bash is disabled by policy in this session\n\nI cannot run the command because the bash tool is disabled by policy."}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/parallel-tool-calls/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/parallel-tool-calls/stdout.expected.jsonl
index 43066629e4..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/parallel-tool-calls/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/parallel-tool-calls/stdout.expected.jsonl
@@ -1,10 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the read tool twice","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_read_a","title":"Read a.txt","kind":"read","status":"in_progress","locations":[{"path":"a.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_read_b","title":"Read b.txt","kind":"read","status":"in_progress","locations":[{"path":"b.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_read_a","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/a.txt</path>\n<type>file</type>\n<content>\n1: alpha\n\n(End of file - total 1 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_read_b","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/b.txt</path>\n<type>file</type>\n<content>\n1: beta\n\n(End of file - total 1 lines)\n</content>"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/permission-switching/input.json b/examples/acp-agent/tests/snapshots/permission-switching/input.json
deleted file mode 100644
index 9adb6b1562..0000000000
--- a/examples/acp-agent/tests/snapshots/permission-switching/input.json
+++ /dev/null
@@ -1,32 +0,0 @@
-{
-  "steps": [
-    {
-      "op": "initialize"
-    },
-    {
-      "op": "newSession"
-    },
-    {
-      "op": "setConfigOption",
-      "configId": "permission",
-      "value": "workspace-write"
-    },
-    {
-      "op": "prompt",
-      "text": "Use the bash tool to run exactly this one command in a single call: printf 'before\\n' > out.txt && cat out.txt. Then reply with the single word DONE and stop."
-    },
-    {
-      "op": "setConfigOption",
-      "configId": "permission",
-      "value": "danger-full-access"
-    },
-    {
-      "op": "prompt",
-      "text": "Use the bash tool to run exactly: cat out.txt. Then reply with the single word DONE and stop."
-    },
-    {
-      "op": "prompt",
-      "text": "Without using any tools, state your current approval policy in one short sentence and stop."
-    }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/permission-switching/session.jsonl b/examples/acp-agent/tests/snapshots/permission-switching/session.jsonl
deleted file mode 100644
index cbb52c1b08..0000000000
--- a/examples/acp-agent/tests/snapshots/permission-switching/session.jsonl
+++ /dev/null
@@ -1,239 +0,0 @@
-{"type":"session","version":0,"id":"df041acb-2f14-4d5f-b6e2-2fb6b9eb6427","createdAt":1783860666204,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-4oJKT4","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":1783860666206,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"permission/preset","seq":1,"time":1783962244578,"data":{"preset":"workspace-write"}}
-{"type":"sandbox/mode","seq":2,"time":1784518115721,"data":{"mode":"workspace-write"}}
-{"type":"approval/policy","seq":3,"time":1783962244578,"data":{"policy":"ask"}}
-{"type":"user/message","seq":4,"time":1783962244578,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly this one command in a single call: printf 'before\\n' > out.txt && cat out.txt. Then reply with the single word DONE and stop."}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1783962244578,"data":{"title":"Use the bash tool to","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":6,"time":1783962244579,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":7,"time":1783962244580,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":8,"time":1783860667444,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
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-{"type":"assistant/chunk","seq":11,"time":1783860667446,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":" wants"}}}
-{"type":"assistant/chunk","seq":12,"time":1783860667446,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":" me"}}}
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-{"type":"assistant/chunk","seq":14,"time":1783860667478,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":" run"}}}
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-{"type":"assistant/chunk","seq":22,"time":1783860667502,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":" \""}}}
-{"type":"assistant/chunk","seq":23,"time":1783860667595,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"D"}}}
-{"type":"assistant/chunk","seq":24,"time":1783860667596,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"ONE"}}}
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diff --git a/examples/acp-agent/tests/snapshots/permission-switching/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/permission-switching/stdout.expected.jsonl
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index 7e51129a1d..0000000000
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-{"jsonrpc":"2.0","id":5,"result":{"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"cat"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" out"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_7Jb7FWHNjIBVML49dEJl1990","title":"cat out.txt","kind":"execute","status":"in_progress","rawInput":"cat out.txt","content":[{"type":"content","content":{"type":"text","text":"Read out.txt"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_7Jb7FWHNjIBVML49dEJl1990","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nbefore\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":6,"result":{"stopReason":"end_turn"}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" state"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" current"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" approval"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" without"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" using"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" any"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" From"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" context"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" provided"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" approval"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" changed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" from"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ask"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"never"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"My"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" approval"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" policy"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" set"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"never"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" —"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" no"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" actions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" requiring"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" approval"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" are"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" permitted"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" they"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" are"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" rejected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" automatically"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","id":7,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/permission-switching/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/permission-switching/system-prompt.expected.md
deleted file mode 100644
index 3ee1805568..0000000000
--- a/examples/acp-agent/tests/snapshots/permission-switching/system-prompt.expected.md
+++ /dev/null
@@ -1,52 +0,0 @@
-You are an AI agent powered by the DeepSeek Harness SDK.
-
-You are a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
-
-Verify your work by running the code or tests. Keep answers brief and factual.
-
-
-Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
-
-Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
-
-Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
-
-Check the [exit code: N] marker on every bash result; investigate failures before moving on.
-
-Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
-
-Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
-
-<!-- dsh-user-approval-policy:ask -->
-
-Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
-
-Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
-
-<!-- request/header change 1 -->
-
-You are an AI agent powered by the DeepSeek Harness SDK.
-
-You are a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
-
-Verify your work by running the code or tests. Keep answers brief and factual.
-
-
-Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
-
-Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
-
-Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
-
-Check the [exit code: N] marker on every bash result; investigate failures before moving on.
-
-Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
-
-Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
-
-Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).
-<!-- dsh-user-approval-policy:never -->
-
-Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
-
-Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
diff --git a/examples/acp-agent/tests/snapshots/permission-switching/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/permission-switching/tool-schemas.expected.json
deleted file mode 100644
index ef40784fa5..0000000000
--- a/examples/acp-agent/tests/snapshots/permission-switching/tool-schemas.expected.json
+++ /dev/null
@@ -1,1102 +0,0 @@
-{
-  "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
-    {
-      "name": "bash",
-      "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "command": {
-            "type": "string",
-            "description": "The bash command to execute."
-          },
-          "description": {
-            "type": "string",
-            "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
-          },
-          "timeoutMs": {
-            "type": "number",
-            "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
-          },
-          "workdir": {
-            "type": "string",
-            "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
-          }
-        },
-        "required": [
-          "command",
-          "description"
-        ]
-      }
-    },
-    {
-      "name": "create_goal",
-      "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "objective": {
-            "type": "string",
-            "description": "The concrete completion objective inferred from the direct human request."
-          },
-          "max_goal_rounds": {
-            "type": "number",
-            "description": "Optional positive safe-integer limit on automatic continuation rounds."
-          }
-        },
-        "required": [
-          "objective"
-        ]
-      }
-    },
-    {
-      "name": "edit",
-      "description": "Edit an existing UTF-8 text file by replacing literal text.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to edit, resolved by the filesystem backend."
-          },
-          "old_string": {
-            "type": "string",
-            "description": "Literal text to replace. Must match exactly."
-          },
-          "new_string": {
-            "type": "string",
-            "description": "Literal replacement text. Use an empty string to delete the match."
-          },
-          "replace_all": {
-            "type": "boolean",
-            "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-          }
-        },
-        "required": [
-          "file_path",
-          "old_string",
-          "new_string"
-        ]
-      }
-    },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
-    {
-      "name": "get_goal",
-      "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
-      "parameters": {
-        "type": "object",
-        "properties": {}
-      }
-    },
-    {
-      "name": "ralph",
-      "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "objective": {
-            "type": "string",
-            "description": "The immutable completion objective for every fresh Ralph round."
-          },
-          "maxRounds": {
-            "type": "number",
-            "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
-          }
-        },
-        "required": [
-          "objective"
-        ]
-      }
-    },
-    {
-      "name": "read",
-      "description": "Read a UTF-8 text file and return line-numbered content.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to read, resolved by the filesystem backend."
-          },
-          "offset": {
-            "type": "number",
-            "description": "1-based first line to return. Defaults to 1."
-          },
-          "limit": {
-            "type": "number",
-            "description": "Maximum number of lines to return. Defaults to 2000."
-          }
-        },
-        "required": [
-          "file_path"
-        ]
-      }
-    },
-    {
-      "name": "skill",
-      "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "name": {
-            "type": "string",
-            "description": "The exact skill name from the available skills list."
-          }
-        },
-        "required": [
-          "name"
-        ]
-      }
-    },
-    {
-      "name": "subagent",
-      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "description": {
-            "type": "string",
-            "description": "A short (3-5 word) description of the delegated task, for display."
-          },
-          "prompt": {
-            "type": "string",
-            "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-          }
-        },
-        "required": [
-          "description",
-          "prompt"
-        ]
-      }
-    },
-    {
-      "name": "subagent_fork",
-      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "description": {
-            "type": "string",
-            "description": "A short (3-5 word) description of the delegated task, for display."
-          },
-          "prompt": {
-            "type": "string",
-            "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-          }
-        },
-        "required": [
-          "description",
-          "prompt"
-        ]
-      }
-    },
-    {
-      "name": "task_kill",
-      "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "task_id": {
-            "type": "string",
-            "description": "Task id returned by the tool that started the background work."
-          },
-          "reason": {
-            "type": "string",
-            "description": "Optional short reason, recorded in the log and forwarded to the task."
-          }
-        },
-        "required": [
-          "task_id"
-        ]
-      }
-    },
-    {
-      "name": "task_list",
-      "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
-      "parameters": {
-        "type": "object",
-        "properties": {}
-      }
-    },
-    {
-      "name": "task_output",
-      "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "task_id": {
-            "type": "string",
-            "description": "Task id returned by the tool that started the background work."
-          },
-          "wait": {
-            "type": "boolean",
-            "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
-          },
-          "timeout_ms": {
-            "type": "number",
-            "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
-          }
-        },
-        "required": [
-          "task_id"
-        ]
-      }
-    },
-    {
-      "name": "todo_write",
-      "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "todos": {
-            "type": "array",
-            "description": "The COMPLETE task list, replacing any previous list.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "content": {
-                  "type": "string",
-                  "description": "What the task is — a short imperative line."
-                },
-                "status": {
-                  "type": "string",
-                  "description": "pending (not started) | in_progress (now) | completed (done).",
-                  "enum": [
-                    "pending",
-                    "in_progress",
-                    "completed"
-                  ]
-                }
-              },
-              "required": [
-                "content",
-                "status"
-              ]
-            }
-          }
-        },
-        "required": [
-          "todos"
-        ]
-      }
-    },
-    {
-      "name": "update_goal",
-      "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "goal_id": {
-            "type": "string",
-            "description": "Exact id returned by get_goal."
-          },
-          "revision": {
-            "type": "number",
-            "description": "Exact positive revision returned by get_goal."
-          },
-          "action": {
-            "type": "string",
-            "description": "edit | pause | resume | complete | blocked",
-            "enum": [
-              "edit",
-              "pause",
-              "resume",
-              "complete",
-              "blocked"
-            ]
-          },
-          "objective": {
-            "type": "string",
-            "description": "Replacement objective; valid only with action edit."
-          },
-          "max_goal_rounds": {
-            "type": "number",
-            "description": "Replacement cap; valid only with action edit."
-          },
-          "blocked_reason": {
-            "type": "string",
-            "description": "Concrete blocking condition; required only with action blocked."
-          }
-        },
-        "required": [
-          "goal_id",
-          "revision",
-          "action"
-        ]
-      }
-    },
-    {
-      "name": "workflow",
-      "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "script": {
-            "type": "string",
-            "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
-          },
-          "meta": {
-            "type": "object",
-            "description": "The workflow identity block (plain JSON — never code).",
-            "additionalProperties": true,
-            "properties": {
-              "name": {
-                "type": "string",
-                "description": "Short kebab-case workflow name."
-              },
-              "description": {
-                "type": "string",
-                "description": "One-line description of what the workflow does."
-              },
-              "whenToUse": {
-                "type": "string",
-                "description": "Optional guidance on when this workflow applies."
-              },
-              "phases": {
-                "type": "array",
-                "description": "Optional phase declarations matched by phase() calls.",
-                "items": {
-                  "type": "object",
-                  "additionalProperties": true,
-                  "properties": {
-                    "title": {
-                      "type": "string",
-                      "description": "The phase title phase() calls match by exact string."
-                    },
-                    "detail": {
-                      "type": "string",
-                      "description": "Optional one-line description of the phase."
-                    },
-                    "provider": {
-                      "type": "string",
-                      "description": "Optional provider override this phase is expected to use."
-                    },
-                    "model": {
-                      "type": "string",
-                      "description": "Optional model override this phase is expected to use."
-                    }
-                  },
-                  "required": [
-                    "title"
-                  ]
-                }
-              }
-            },
-            "required": [
-              "name",
-              "description"
-            ]
-          },
-          "args": {
-            "type": "object",
-            "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
-            "additionalProperties": true
-          }
-        },
-        "required": [
-          "script",
-          "meta"
-        ]
-      }
-    },
-    {
-      "name": "write",
-      "description": "Create or fully replace a UTF-8 text file.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to write, resolved by the filesystem backend."
-          },
-          "content": {
-            "type": "string",
-            "description": "Full UTF-8 text content to write."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-          }
-        },
-        "required": [
-          "file_path",
-          "content"
-        ]
-      }
-    }
-  ],
-  "changes": [
-    [
-      {
-        "name": "ask_user_question",
-        "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "questions": {
-              "type": "array",
-              "description": "Questions to ask the user before continuing.",
-              "items": {
-                "type": "object",
-                "additionalProperties": true,
-                "properties": {
-                  "id": {
-                    "type": "string",
-                    "description": "Stable id for this question; echoed in the answer."
-                  },
-                  "question": {
-                    "type": "string",
-                    "description": "The specific question to ask the user."
-                  },
-                  "header": {
-                    "type": "string",
-                    "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                  },
-                  "options": {
-                    "type": "array",
-                    "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                    "items": {
-                      "type": "object",
-                      "additionalProperties": true,
-                      "properties": {
-                        "label": {
-                          "type": "string",
-                          "description": "Short user-facing option label."
-                        },
-                        "description": {
-                          "type": "string",
-                          "description": "One sentence explaining the tradeoff or impact."
-                        }
-                      },
-                      "required": [
-                        "label"
-                      ]
-                    }
-                  },
-                  "multi_select": {
-                    "type": "boolean",
-                    "description": "Whether the user may select more than one option. Defaults to false."
-                  }
-                },
-                "required": [
-                  "id",
-                  "question"
-                ]
-              }
-            }
-          },
-          "required": [
-            "questions"
-          ]
-        }
-      },
-      {
-        "name": "bash",
-        "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "command": {
-              "type": "string",
-              "description": "The bash command to execute."
-            },
-            "description": {
-              "type": "string",
-              "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
-            },
-            "timeoutMs": {
-              "type": "number",
-              "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
-            },
-            "workdir": {
-              "type": "string",
-              "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
-            }
-          },
-          "required": [
-            "command",
-            "description"
-          ]
-        }
-      },
-      {
-        "name": "create_goal",
-        "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "objective": {
-              "type": "string",
-              "description": "The concrete completion objective inferred from the direct human request."
-            },
-            "max_goal_rounds": {
-              "type": "number",
-              "description": "Optional positive safe-integer limit on automatic continuation rounds."
-            }
-          },
-          "required": [
-            "objective"
-          ]
-        }
-      },
-      {
-        "name": "edit",
-        "description": "Edit an existing UTF-8 text file by replacing literal text.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to edit, resolved by the filesystem backend."
-            },
-            "old_string": {
-              "type": "string",
-              "description": "Literal text to replace. Must match exactly."
-            },
-            "new_string": {
-              "type": "string",
-              "description": "Literal replacement text. Use an empty string to delete the match."
-            },
-            "replace_all": {
-              "type": "boolean",
-              "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-            }
-          },
-          "required": [
-            "file_path",
-            "old_string",
-            "new_string"
-          ]
-        }
-      },
-      {
-        "name": "exit_plan_mode",
-        "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "plan": {
-              "type": "string",
-              "description": "The complete plan, as markdown, starting with a # heading that names it."
-            }
-          },
-          "required": [
-            "plan"
-          ]
-        }
-      },
-      {
-        "name": "get_goal",
-        "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
-        "parameters": {
-          "type": "object",
-          "properties": {}
-        }
-      },
-      {
-        "name": "ralph",
-        "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "objective": {
-              "type": "string",
-              "description": "The immutable completion objective for every fresh Ralph round."
-            },
-            "maxRounds": {
-              "type": "number",
-              "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
-            }
-          },
-          "required": [
-            "objective"
-          ]
-        }
-      },
-      {
-        "name": "read",
-        "description": "Read a UTF-8 text file and return line-numbered content.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to read, resolved by the filesystem backend."
-            },
-            "offset": {
-              "type": "number",
-              "description": "1-based first line to return. Defaults to 1."
-            },
-            "limit": {
-              "type": "number",
-              "description": "Maximum number of lines to return. Defaults to 2000."
-            }
-          },
-          "required": [
-            "file_path"
-          ]
-        }
-      },
-      {
-        "name": "skill",
-        "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "name": {
-              "type": "string",
-              "description": "The exact skill name from the available skills list."
-            }
-          },
-          "required": [
-            "name"
-          ]
-        }
-      },
-      {
-        "name": "subagent",
-        "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "description": {
-              "type": "string",
-              "description": "A short (3-5 word) description of the delegated task, for display."
-            },
-            "prompt": {
-              "type": "string",
-              "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-            }
-          },
-          "required": [
-            "description",
-            "prompt"
-          ]
-        }
-      },
-      {
-        "name": "subagent_fork",
-        "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "description": {
-              "type": "string",
-              "description": "A short (3-5 word) description of the delegated task, for display."
-            },
-            "prompt": {
-              "type": "string",
-              "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-            }
-          },
-          "required": [
-            "description",
-            "prompt"
-          ]
-        }
-      },
-      {
-        "name": "task_kill",
-        "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "task_id": {
-              "type": "string",
-              "description": "Task id returned by the tool that started the background work."
-            },
-            "reason": {
-              "type": "string",
-              "description": "Optional short reason, recorded in the log and forwarded to the task."
-            }
-          },
-          "required": [
-            "task_id"
-          ]
-        }
-      },
-      {
-        "name": "task_list",
-        "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
-        "parameters": {
-          "type": "object",
-          "properties": {}
-        }
-      },
-      {
-        "name": "task_output",
-        "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "task_id": {
-              "type": "string",
-              "description": "Task id returned by the tool that started the background work."
-            },
-            "wait": {
-              "type": "boolean",
-              "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
-            },
-            "timeout_ms": {
-              "type": "number",
-              "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
-            }
-          },
-          "required": [
-            "task_id"
-          ]
-        }
-      },
-      {
-        "name": "todo_write",
-        "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "todos": {
-              "type": "array",
-              "description": "The COMPLETE task list, replacing any previous list.",
-              "items": {
-                "type": "object",
-                "additionalProperties": true,
-                "properties": {
-                  "content": {
-                    "type": "string",
-                    "description": "What the task is — a short imperative line."
-                  },
-                  "status": {
-                    "type": "string",
-                    "description": "pending (not started) | in_progress (now) | completed (done).",
-                    "enum": [
-                      "pending",
-                      "in_progress",
-                      "completed"
-                    ]
-                  }
-                },
-                "required": [
-                  "content",
-                  "status"
-                ]
-              }
-            }
-          },
-          "required": [
-            "todos"
-          ]
-        }
-      },
-      {
-        "name": "update_goal",
-        "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "goal_id": {
-              "type": "string",
-              "description": "Exact id returned by get_goal."
-            },
-            "revision": {
-              "type": "number",
-              "description": "Exact positive revision returned by get_goal."
-            },
-            "action": {
-              "type": "string",
-              "description": "edit | pause | resume | complete | blocked",
-              "enum": [
-                "edit",
-                "pause",
-                "resume",
-                "complete",
-                "blocked"
-              ]
-            },
-            "objective": {
-              "type": "string",
-              "description": "Replacement objective; valid only with action edit."
-            },
-            "max_goal_rounds": {
-              "type": "number",
-              "description": "Replacement cap; valid only with action edit."
-            },
-            "blocked_reason": {
-              "type": "string",
-              "description": "Concrete blocking condition; required only with action blocked."
-            }
-          },
-          "required": [
-            "goal_id",
-            "revision",
-            "action"
-          ]
-        }
-      },
-      {
-        "name": "workflow",
-        "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "script": {
-              "type": "string",
-              "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
-            },
-            "meta": {
-              "type": "object",
-              "description": "The workflow identity block (plain JSON — never code).",
-              "additionalProperties": true,
-              "properties": {
-                "name": {
-                  "type": "string",
-                  "description": "Short kebab-case workflow name."
-                },
-                "description": {
-                  "type": "string",
-                  "description": "One-line description of what the workflow does."
-                },
-                "whenToUse": {
-                  "type": "string",
-                  "description": "Optional guidance on when this workflow applies."
-                },
-                "phases": {
-                  "type": "array",
-                  "description": "Optional phase declarations matched by phase() calls.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "title": {
-                        "type": "string",
-                        "description": "The phase title phase() calls match by exact string."
-                      },
-                      "detail": {
-                        "type": "string",
-                        "description": "Optional one-line description of the phase."
-                      },
-                      "provider": {
-                        "type": "string",
-                        "description": "Optional provider override this phase is expected to use."
-                      },
-                      "model": {
-                        "type": "string",
-                        "description": "Optional model override this phase is expected to use."
-                      }
-                    },
-                    "required": [
-                      "title"
-                    ]
-                  }
-                }
-              },
-              "required": [
-                "name",
-                "description"
-              ]
-            },
-            "args": {
-              "type": "object",
-              "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
-              "additionalProperties": true
-            }
-          },
-          "required": [
-            "script",
-            "meta"
-          ]
-        }
-      },
-      {
-        "name": "write",
-        "description": "Create or fully replace a UTF-8 text file.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to write, resolved by the filesystem backend."
-            },
-            "content": {
-              "type": "string",
-              "description": "Full UTF-8 text content to write."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-            }
-          },
-          "required": [
-            "file_path",
-            "content"
-          ]
-        }
-      }
-    ]
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/permission-switching/workspace/notes.txt b/examples/acp-agent/tests/snapshots/permission-switching/workspace/notes.txt
deleted file mode 100644
index a6eda7f939..0000000000
--- a/examples/acp-agent/tests/snapshots/permission-switching/workspace/notes.txt
+++ /dev/null
@@ -1 +0,0 @@
-hello from the sandboxed workspace
diff --git a/examples/acp-agent/tests/snapshots/plan-mode-reject/input.json b/examples/acp-agent/tests/snapshots/plan-mode-reject/input.json
deleted file mode 100644
index 07c135a87f..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode-reject/input.json
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-  "steps": [
-    {
-      "op": "initialize"
-    },
-    {
-      "op": "newSession"
-    },
-    {
-      "op": "setMode",
-      "modeId": "plan"
-    },
-    {
-      "op": "prompt",
-      "text": "Read the file notes.txt (use the relative path notes.txt exactly, never an absolute path), then present a short plan titled '# Fix the greeting typo' via exit_plan_mode, exactly once. If the review does not approve, summarize the reviewer's feedback in plain text and end your reply - do not present the plan again."
-    }
-  ],
-  "elicitationAnswers": [
-    {
-      "action": "accept",
-      "custom": "Also add a verification step that re-reads the file after the fix."
-    }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/plan-mode-reject/session.jsonl b/examples/acp-agent/tests/snapshots/plan-mode-reject/session.jsonl
deleted file mode 100644
index cad0f9cfb4..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode-reject/session.jsonl
+++ /dev/null
@@ -1,425 +0,0 @@
-{"type":"session","version":0,"id":"50138298-1385-449e-b252-146acb0571d0","createdAt":1784525384931,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-DTr6Ra","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":1784525384935,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"plan/mode","seq":1,"time":1784525384935,"data":{"active":true}}
-{"type":"user/message","seq":2,"time":1784525384935,"data":{"content":[{"type":"text","text":"Read the file notes.txt (use the relative path notes.txt exactly, never an absolute path), then present a short plan titled '# Fix the greeting typo' via exit_plan_mode, exactly once. If the review does not approve, summarize the reviewer's feedback in plain text and end your reply - do not present the plan again."}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"session/title","seq":3,"time":1784525384935,"data":{"title":"Read the file notes.txt (use","messageSeqs":[2],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":4,"time":1784525384938,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":5,"time":1784525384938,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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-{"type":"assistant/chunk","seq":8,"time":1784525385471,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":" user"}}}
-{"type":"assistant/chunk","seq":9,"time":1784525385503,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":" wants"}}}
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diff --git a/examples/acp-agent/tests/snapshots/plan-mode-reject/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/plan-mode-reject/stdout.expected.jsonl
deleted file mode 100644
index 976bfd36e5..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode-reject/stdout.expected.jsonl
+++ /dev/null
@@ -1,279 +0,0 @@
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diff --git a/examples/acp-agent/tests/snapshots/plan-mode-reject/workspace/notes.txt b/examples/acp-agent/tests/snapshots/plan-mode-reject/workspace/notes.txt
deleted file mode 100644
index 0230df4b3b..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode-reject/workspace/notes.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-project notes
-- the greeting message still says "helo wrld"
diff --git a/examples/acp-agent/tests/snapshots/plan-mode/input.json b/examples/acp-agent/tests/snapshots/plan-mode/input.json
deleted file mode 100644
index afc80dc900..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode/input.json
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-  "steps": [
-    {
-      "op": "initialize"
-    },
-    {
-      "op": "newSession"
-    },
-    {
-      "op": "setMode",
-      "modeId": "plan"
-    },
-    {
-      "op": "prompt",
-      "text": "The typo is on line 2 of notes.txt itself; the workspace contains no other file. Inspect it with the bash tool: run exactly `cat notes.txt` (relative path, no other command). Then present a one-step plan titled '# Fix the greeting typo' via exit_plan_mode: the single step is editing line 2 of notes.txt to say hello world. Do not edit anything before the review approves. After it approves, apply exactly that one edit to notes.txt with the edit tool and stop — no other commands, do not look for any other file."
-    },
-    {
-      "op": "prompt",
-      "text": "Read notes.txt (relative path notes.txt) and reply with the single word DONE if line 2 now says hello world."
-    }
-  ],
-  "elicitationAnswers": [
-    {
-      "action": "accept",
-      "choice": "Approve"
-    }
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/plan-mode/session.jsonl b/examples/acp-agent/tests/snapshots/plan-mode/session.jsonl
deleted file mode 100644
index 71a1189702..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode/session.jsonl
+++ /dev/null
@@ -1,532 +0,0 @@
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" apply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" edit"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_XG9RoTfylfw20IP0dmrV7315","title":"Read notes.txt","kind":"read","status":"in_progress","locations":[{"path":"notes.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_XG9RoTfylfw20IP0dmrV7315","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/notes.txt</path>\n<type>file</type>\n<content>\n1: project notes\n2: - the greeting message still says \"helo wrld\"\n\n(End of file - total 2 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" can"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" apply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" edit"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_7H6VFdLjBqzzW9M5Z4OR8016","title":"Edit notes.txt","kind":"edit","status":"in_progress","locations":[{"path":"notes.txt"}],"content":[{"type":"diff","path":"notes.txt","oldText":"- the greeting message still says \"helo wrld\"","newText":"hello world"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_7H6VFdLjBqzzW9M5Z4OR8016","status":"completed","content":[{"type":"diff","path":"notes.txt","oldText":"project notes\n- the greeting message still says \"helo wrld\"","newText":"project notes\nhello world"}],"title":"Edit notes.txt"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" edit"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" was"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" applied"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Line"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" "}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" of"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" notes"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reads"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" world"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Done"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"Done"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" Line"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" "}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" of"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"notes"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"`"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" reads"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" `"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":" world"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"`."}}}}
-{"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_ET_5aWcvKPYl6cZ73MsPcV29873","title":"Read notes.txt","kind":"read","status":"in_progress","locations":[{"path":"notes.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_ET_5aWcvKPYl6cZ73MsPcV29873","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/notes.txt</path>\n<type>file</type>\n<content>\n1: project notes\n2: hello world\n\n(End of file - total 2 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Line"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" "}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" says"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" world"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":5,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/plan-mode/system-prompt.expected.md b/examples/acp-agent/tests/snapshots/plan-mode/system-prompt.expected.md
deleted file mode 100644
index df467239bd..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode/system-prompt.expected.md
+++ /dev/null
@@ -1,66 +0,0 @@
-You are an AI agent powered by the DeepSeek Harness SDK.
-
-You are a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
-
-Verify your work by running the code or tests. Keep answers brief and factual.
-
-
-You are in plan mode. Stay in plan mode until exit_plan_mode succeeds or the user switches the session mode. Imperative language to implement changes means plan the implementation, not execute it. A user's conversational agreement — including an answer confirming something you asked — approves nothing and does not end plan mode; fold the confirmed decision into the plan and submit it through exit_plan_mode.
-
-Explore first. Use non-mutating reads, searches, static analysis, and checks to ground the plan in the actual repository. Do not edit or write files, change configuration, run formatters or code generation that rewrites tracked files, commit, or otherwise carry out the plan. Prefer existing functions and patterns over new machinery.
-
-The tool catalog stays the same across modes for request-cache stability. These plan-mode rules override any later tool description or guidance that suggests using mutation tools; those tools remain listed only to keep the request shape stable. Do not use todo_write to track this planning phase: it tracks implementation after an approved plan, while the plan itself belongs in exit_plan_mode.
-
-Resolve discoverable facts by inspection. Use ask_user_question only for user-owned choices or material ambiguity that inspection cannot answer. Do not ask the user where code lives or how current behavior works when you can find out.
-
-Make the plan decision-complete: state the goal and success criteria; group implementation changes by subsystem; identify public API, schema, and data-flow changes; cover edge cases, failure modes, tests, acceptance criteria, and explicit assumptions. Keep it concise enough to review but detailed enough that another engineer can implement it without making design decisions.
-
-When ready, call exit_plan_mode with the complete plan markdown, starting with a # title. Make exit_plan_mode the only and final tool call in that assistant response: it presents the plan for approval, and implementation begins only in a later step after approval. Do not paste the final plan as a plain reply or ask "should I proceed?" through prose or ask_user_question. If review rejects it, incorporate the feedback and present again. If the review channel is unavailable or aborted, stay in plan mode and ask the user to switch modes manually; do not proceed with implementation.
-
-
-Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
-
-Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
-
-Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
-
-Check the [exit code: N] marker on every bash result; investigate failures before moving on.
-
-Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
-
-Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
-
-Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).
-<!-- dsh-user-approval-policy:never -->
-
-Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
-
-Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
-
-<!-- request/header change 1 -->
-
-You are an AI agent powered by the DeepSeek Harness SDK.
-
-You are a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
-
-Verify your work by running the code or tests. Keep answers brief and factual.
-
-
-Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
-
-Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
-
-Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
-
-Check the [exit code: N] marker on every bash result; investigate failures before moving on.
-
-Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
-
-Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
-
-Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).
-<!-- dsh-user-approval-policy:never -->
-
-Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
-
-Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.
diff --git a/examples/acp-agent/tests/snapshots/plan-mode/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/plan-mode/tool-schemas.expected.json
deleted file mode 100644
index ef40784fa5..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode/tool-schemas.expected.json
+++ /dev/null
@@ -1,1102 +0,0 @@
-{
-  "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
-    {
-      "name": "bash",
-      "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "command": {
-            "type": "string",
-            "description": "The bash command to execute."
-          },
-          "description": {
-            "type": "string",
-            "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
-          },
-          "timeoutMs": {
-            "type": "number",
-            "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
-          },
-          "workdir": {
-            "type": "string",
-            "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
-          }
-        },
-        "required": [
-          "command",
-          "description"
-        ]
-      }
-    },
-    {
-      "name": "create_goal",
-      "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "objective": {
-            "type": "string",
-            "description": "The concrete completion objective inferred from the direct human request."
-          },
-          "max_goal_rounds": {
-            "type": "number",
-            "description": "Optional positive safe-integer limit on automatic continuation rounds."
-          }
-        },
-        "required": [
-          "objective"
-        ]
-      }
-    },
-    {
-      "name": "edit",
-      "description": "Edit an existing UTF-8 text file by replacing literal text.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to edit, resolved by the filesystem backend."
-          },
-          "old_string": {
-            "type": "string",
-            "description": "Literal text to replace. Must match exactly."
-          },
-          "new_string": {
-            "type": "string",
-            "description": "Literal replacement text. Use an empty string to delete the match."
-          },
-          "replace_all": {
-            "type": "boolean",
-            "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-          }
-        },
-        "required": [
-          "file_path",
-          "old_string",
-          "new_string"
-        ]
-      }
-    },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
-    {
-      "name": "get_goal",
-      "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
-      "parameters": {
-        "type": "object",
-        "properties": {}
-      }
-    },
-    {
-      "name": "ralph",
-      "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "objective": {
-            "type": "string",
-            "description": "The immutable completion objective for every fresh Ralph round."
-          },
-          "maxRounds": {
-            "type": "number",
-            "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
-          }
-        },
-        "required": [
-          "objective"
-        ]
-      }
-    },
-    {
-      "name": "read",
-      "description": "Read a UTF-8 text file and return line-numbered content.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to read, resolved by the filesystem backend."
-          },
-          "offset": {
-            "type": "number",
-            "description": "1-based first line to return. Defaults to 1."
-          },
-          "limit": {
-            "type": "number",
-            "description": "Maximum number of lines to return. Defaults to 2000."
-          }
-        },
-        "required": [
-          "file_path"
-        ]
-      }
-    },
-    {
-      "name": "skill",
-      "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "name": {
-            "type": "string",
-            "description": "The exact skill name from the available skills list."
-          }
-        },
-        "required": [
-          "name"
-        ]
-      }
-    },
-    {
-      "name": "subagent",
-      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "description": {
-            "type": "string",
-            "description": "A short (3-5 word) description of the delegated task, for display."
-          },
-          "prompt": {
-            "type": "string",
-            "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-          }
-        },
-        "required": [
-          "description",
-          "prompt"
-        ]
-      }
-    },
-    {
-      "name": "subagent_fork",
-      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "description": {
-            "type": "string",
-            "description": "A short (3-5 word) description of the delegated task, for display."
-          },
-          "prompt": {
-            "type": "string",
-            "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
-          },
-          "run_in_background": {
-            "type": "boolean",
-            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-          }
-        },
-        "required": [
-          "description",
-          "prompt"
-        ]
-      }
-    },
-    {
-      "name": "task_kill",
-      "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "task_id": {
-            "type": "string",
-            "description": "Task id returned by the tool that started the background work."
-          },
-          "reason": {
-            "type": "string",
-            "description": "Optional short reason, recorded in the log and forwarded to the task."
-          }
-        },
-        "required": [
-          "task_id"
-        ]
-      }
-    },
-    {
-      "name": "task_list",
-      "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
-      "parameters": {
-        "type": "object",
-        "properties": {}
-      }
-    },
-    {
-      "name": "task_output",
-      "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "task_id": {
-            "type": "string",
-            "description": "Task id returned by the tool that started the background work."
-          },
-          "wait": {
-            "type": "boolean",
-            "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
-          },
-          "timeout_ms": {
-            "type": "number",
-            "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
-          }
-        },
-        "required": [
-          "task_id"
-        ]
-      }
-    },
-    {
-      "name": "todo_write",
-      "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "todos": {
-            "type": "array",
-            "description": "The COMPLETE task list, replacing any previous list.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "content": {
-                  "type": "string",
-                  "description": "What the task is — a short imperative line."
-                },
-                "status": {
-                  "type": "string",
-                  "description": "pending (not started) | in_progress (now) | completed (done).",
-                  "enum": [
-                    "pending",
-                    "in_progress",
-                    "completed"
-                  ]
-                }
-              },
-              "required": [
-                "content",
-                "status"
-              ]
-            }
-          }
-        },
-        "required": [
-          "todos"
-        ]
-      }
-    },
-    {
-      "name": "update_goal",
-      "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "goal_id": {
-            "type": "string",
-            "description": "Exact id returned by get_goal."
-          },
-          "revision": {
-            "type": "number",
-            "description": "Exact positive revision returned by get_goal."
-          },
-          "action": {
-            "type": "string",
-            "description": "edit | pause | resume | complete | blocked",
-            "enum": [
-              "edit",
-              "pause",
-              "resume",
-              "complete",
-              "blocked"
-            ]
-          },
-          "objective": {
-            "type": "string",
-            "description": "Replacement objective; valid only with action edit."
-          },
-          "max_goal_rounds": {
-            "type": "number",
-            "description": "Replacement cap; valid only with action edit."
-          },
-          "blocked_reason": {
-            "type": "string",
-            "description": "Concrete blocking condition; required only with action blocked."
-          }
-        },
-        "required": [
-          "goal_id",
-          "revision",
-          "action"
-        ]
-      }
-    },
-    {
-      "name": "workflow",
-      "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "script": {
-            "type": "string",
-            "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
-          },
-          "meta": {
-            "type": "object",
-            "description": "The workflow identity block (plain JSON — never code).",
-            "additionalProperties": true,
-            "properties": {
-              "name": {
-                "type": "string",
-                "description": "Short kebab-case workflow name."
-              },
-              "description": {
-                "type": "string",
-                "description": "One-line description of what the workflow does."
-              },
-              "whenToUse": {
-                "type": "string",
-                "description": "Optional guidance on when this workflow applies."
-              },
-              "phases": {
-                "type": "array",
-                "description": "Optional phase declarations matched by phase() calls.",
-                "items": {
-                  "type": "object",
-                  "additionalProperties": true,
-                  "properties": {
-                    "title": {
-                      "type": "string",
-                      "description": "The phase title phase() calls match by exact string."
-                    },
-                    "detail": {
-                      "type": "string",
-                      "description": "Optional one-line description of the phase."
-                    },
-                    "provider": {
-                      "type": "string",
-                      "description": "Optional provider override this phase is expected to use."
-                    },
-                    "model": {
-                      "type": "string",
-                      "description": "Optional model override this phase is expected to use."
-                    }
-                  },
-                  "required": [
-                    "title"
-                  ]
-                }
-              }
-            },
-            "required": [
-              "name",
-              "description"
-            ]
-          },
-          "args": {
-            "type": "object",
-            "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
-            "additionalProperties": true
-          }
-        },
-        "required": [
-          "script",
-          "meta"
-        ]
-      }
-    },
-    {
-      "name": "write",
-      "description": "Create or fully replace a UTF-8 text file.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "file_path": {
-            "type": "string",
-            "description": "Path to write, resolved by the filesystem backend."
-          },
-          "content": {
-            "type": "string",
-            "description": "Full UTF-8 text content to write."
-          },
-          "sandbox_permissions": {
-            "type": "string",
-            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-            "enum": [
-              "workspace-write",
-              "danger-full-access"
-            ]
-          },
-          "justification": {
-            "type": "string",
-            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-          }
-        },
-        "required": [
-          "file_path",
-          "content"
-        ]
-      }
-    }
-  ],
-  "changes": [
-    [
-      {
-        "name": "ask_user_question",
-        "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "questions": {
-              "type": "array",
-              "description": "Questions to ask the user before continuing.",
-              "items": {
-                "type": "object",
-                "additionalProperties": true,
-                "properties": {
-                  "id": {
-                    "type": "string",
-                    "description": "Stable id for this question; echoed in the answer."
-                  },
-                  "question": {
-                    "type": "string",
-                    "description": "The specific question to ask the user."
-                  },
-                  "header": {
-                    "type": "string",
-                    "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                  },
-                  "options": {
-                    "type": "array",
-                    "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                    "items": {
-                      "type": "object",
-                      "additionalProperties": true,
-                      "properties": {
-                        "label": {
-                          "type": "string",
-                          "description": "Short user-facing option label."
-                        },
-                        "description": {
-                          "type": "string",
-                          "description": "One sentence explaining the tradeoff or impact."
-                        }
-                      },
-                      "required": [
-                        "label"
-                      ]
-                    }
-                  },
-                  "multi_select": {
-                    "type": "boolean",
-                    "description": "Whether the user may select more than one option. Defaults to false."
-                  }
-                },
-                "required": [
-                  "id",
-                  "question"
-                ]
-              }
-            }
-          },
-          "required": [
-            "questions"
-          ]
-        }
-      },
-      {
-        "name": "bash",
-        "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "command": {
-              "type": "string",
-              "description": "The bash command to execute."
-            },
-            "description": {
-              "type": "string",
-              "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
-            },
-            "timeoutMs": {
-              "type": "number",
-              "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
-            },
-            "workdir": {
-              "type": "string",
-              "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
-            }
-          },
-          "required": [
-            "command",
-            "description"
-          ]
-        }
-      },
-      {
-        "name": "create_goal",
-        "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "objective": {
-              "type": "string",
-              "description": "The concrete completion objective inferred from the direct human request."
-            },
-            "max_goal_rounds": {
-              "type": "number",
-              "description": "Optional positive safe-integer limit on automatic continuation rounds."
-            }
-          },
-          "required": [
-            "objective"
-          ]
-        }
-      },
-      {
-        "name": "edit",
-        "description": "Edit an existing UTF-8 text file by replacing literal text.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to edit, resolved by the filesystem backend."
-            },
-            "old_string": {
-              "type": "string",
-              "description": "Literal text to replace. Must match exactly."
-            },
-            "new_string": {
-              "type": "string",
-              "description": "Literal replacement text. Use an empty string to delete the match."
-            },
-            "replace_all": {
-              "type": "boolean",
-              "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-            }
-          },
-          "required": [
-            "file_path",
-            "old_string",
-            "new_string"
-          ]
-        }
-      },
-      {
-        "name": "exit_plan_mode",
-        "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "plan": {
-              "type": "string",
-              "description": "The complete plan, as markdown, starting with a # heading that names it."
-            }
-          },
-          "required": [
-            "plan"
-          ]
-        }
-      },
-      {
-        "name": "get_goal",
-        "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
-        "parameters": {
-          "type": "object",
-          "properties": {}
-        }
-      },
-      {
-        "name": "ralph",
-        "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "objective": {
-              "type": "string",
-              "description": "The immutable completion objective for every fresh Ralph round."
-            },
-            "maxRounds": {
-              "type": "number",
-              "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
-            }
-          },
-          "required": [
-            "objective"
-          ]
-        }
-      },
-      {
-        "name": "read",
-        "description": "Read a UTF-8 text file and return line-numbered content.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to read, resolved by the filesystem backend."
-            },
-            "offset": {
-              "type": "number",
-              "description": "1-based first line to return. Defaults to 1."
-            },
-            "limit": {
-              "type": "number",
-              "description": "Maximum number of lines to return. Defaults to 2000."
-            }
-          },
-          "required": [
-            "file_path"
-          ]
-        }
-      },
-      {
-        "name": "skill",
-        "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "name": {
-              "type": "string",
-              "description": "The exact skill name from the available skills list."
-            }
-          },
-          "required": [
-            "name"
-          ]
-        }
-      },
-      {
-        "name": "subagent",
-        "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "description": {
-              "type": "string",
-              "description": "A short (3-5 word) description of the delegated task, for display."
-            },
-            "prompt": {
-              "type": "string",
-              "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-            }
-          },
-          "required": [
-            "description",
-            "prompt"
-          ]
-        }
-      },
-      {
-        "name": "subagent_fork",
-        "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "description": {
-              "type": "string",
-              "description": "A short (3-5 word) description of the delegated task, for display."
-            },
-            "prompt": {
-              "type": "string",
-              "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
-            },
-            "run_in_background": {
-              "type": "boolean",
-              "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
-            }
-          },
-          "required": [
-            "description",
-            "prompt"
-          ]
-        }
-      },
-      {
-        "name": "task_kill",
-        "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "task_id": {
-              "type": "string",
-              "description": "Task id returned by the tool that started the background work."
-            },
-            "reason": {
-              "type": "string",
-              "description": "Optional short reason, recorded in the log and forwarded to the task."
-            }
-          },
-          "required": [
-            "task_id"
-          ]
-        }
-      },
-      {
-        "name": "task_list",
-        "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
-        "parameters": {
-          "type": "object",
-          "properties": {}
-        }
-      },
-      {
-        "name": "task_output",
-        "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "task_id": {
-              "type": "string",
-              "description": "Task id returned by the tool that started the background work."
-            },
-            "wait": {
-              "type": "boolean",
-              "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
-            },
-            "timeout_ms": {
-              "type": "number",
-              "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
-            }
-          },
-          "required": [
-            "task_id"
-          ]
-        }
-      },
-      {
-        "name": "todo_write",
-        "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "todos": {
-              "type": "array",
-              "description": "The COMPLETE task list, replacing any previous list.",
-              "items": {
-                "type": "object",
-                "additionalProperties": true,
-                "properties": {
-                  "content": {
-                    "type": "string",
-                    "description": "What the task is — a short imperative line."
-                  },
-                  "status": {
-                    "type": "string",
-                    "description": "pending (not started) | in_progress (now) | completed (done).",
-                    "enum": [
-                      "pending",
-                      "in_progress",
-                      "completed"
-                    ]
-                  }
-                },
-                "required": [
-                  "content",
-                  "status"
-                ]
-              }
-            }
-          },
-          "required": [
-            "todos"
-          ]
-        }
-      },
-      {
-        "name": "update_goal",
-        "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "goal_id": {
-              "type": "string",
-              "description": "Exact id returned by get_goal."
-            },
-            "revision": {
-              "type": "number",
-              "description": "Exact positive revision returned by get_goal."
-            },
-            "action": {
-              "type": "string",
-              "description": "edit | pause | resume | complete | blocked",
-              "enum": [
-                "edit",
-                "pause",
-                "resume",
-                "complete",
-                "blocked"
-              ]
-            },
-            "objective": {
-              "type": "string",
-              "description": "Replacement objective; valid only with action edit."
-            },
-            "max_goal_rounds": {
-              "type": "number",
-              "description": "Replacement cap; valid only with action edit."
-            },
-            "blocked_reason": {
-              "type": "string",
-              "description": "Concrete blocking condition; required only with action blocked."
-            }
-          },
-          "required": [
-            "goal_id",
-            "revision",
-            "action"
-          ]
-        }
-      },
-      {
-        "name": "workflow",
-        "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "script": {
-              "type": "string",
-              "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
-            },
-            "meta": {
-              "type": "object",
-              "description": "The workflow identity block (plain JSON — never code).",
-              "additionalProperties": true,
-              "properties": {
-                "name": {
-                  "type": "string",
-                  "description": "Short kebab-case workflow name."
-                },
-                "description": {
-                  "type": "string",
-                  "description": "One-line description of what the workflow does."
-                },
-                "whenToUse": {
-                  "type": "string",
-                  "description": "Optional guidance on when this workflow applies."
-                },
-                "phases": {
-                  "type": "array",
-                  "description": "Optional phase declarations matched by phase() calls.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "title": {
-                        "type": "string",
-                        "description": "The phase title phase() calls match by exact string."
-                      },
-                      "detail": {
-                        "type": "string",
-                        "description": "Optional one-line description of the phase."
-                      },
-                      "provider": {
-                        "type": "string",
-                        "description": "Optional provider override this phase is expected to use."
-                      },
-                      "model": {
-                        "type": "string",
-                        "description": "Optional model override this phase is expected to use."
-                      }
-                    },
-                    "required": [
-                      "title"
-                    ]
-                  }
-                }
-              },
-              "required": [
-                "name",
-                "description"
-              ]
-            },
-            "args": {
-              "type": "object",
-              "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).",
-              "additionalProperties": true
-            }
-          },
-          "required": [
-            "script",
-            "meta"
-          ]
-        }
-      },
-      {
-        "name": "write",
-        "description": "Create or fully replace a UTF-8 text file.",
-        "parameters": {
-          "type": "object",
-          "properties": {
-            "file_path": {
-              "type": "string",
-              "description": "Path to write, resolved by the filesystem backend."
-            },
-            "content": {
-              "type": "string",
-              "description": "Full UTF-8 text content to write."
-            },
-            "sandbox_permissions": {
-              "type": "string",
-              "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
-              "enum": [
-                "workspace-write",
-                "danger-full-access"
-              ]
-            },
-            "justification": {
-              "type": "string",
-              "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
-            }
-          },
-          "required": [
-            "file_path",
-            "content"
-          ]
-        }
-      }
-    ]
-  ]
-}
diff --git a/examples/acp-agent/tests/snapshots/plan-mode/workspace/notes.txt b/examples/acp-agent/tests/snapshots/plan-mode/workspace/notes.txt
deleted file mode 100644
index 0230df4b3b..0000000000
--- a/examples/acp-agent/tests/snapshots/plan-mode/workspace/notes.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-project notes
-- the greeting message still says "helo wrld"
diff --git a/examples/acp-agent/tests/snapshots/pty-tools/input.json b/examples/acp-agent/tests/snapshots/pty-tools/input.json
index abb800b56b..416dd24f4c 100644
--- a/examples/acp-agent/tests/snapshots/pty-tools/input.json
+++ b/examples/acp-agent/tests/snapshots/pty-tools/input.json
@@ -1,6 +1,6 @@
 {
   "steps": [
-    { "op": "initialize", "terminalOutput": true },
+    { "op": "initialize" },
     { "op": "newSession" },
     { "op": "prompt", "text": "Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE." }
   ]
diff --git a/examples/acp-agent/tests/snapshots/pty-tools/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/pty-tools/stdout.expected.jsonl
index b6ff0e64a1..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/pty-tools/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/pty-tools/stdout.expected.jsonl
@@ -1,18 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-pro\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Exercise the six PTY tools","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-spawn","title":"Open terminal main","kind":"execute","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-spawn","status":"completed","content":[{"type":"content","content":{"type":"text","text":"started terminal session pty-1 (main) [type: shell]\ndsh> "}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-send","title":"printf 'PTY_OK\\n'","kind":"execute","status":"in_progress","rawInput":"printf 'PTY_OK\\n'","content":[{"type":"content","content":{"type":"text","text":"Terminal pty-1"}},{"type":"terminal","terminalId":"pty-send"}],"_meta":{"terminal_info":{"terminal_id":"pty-send","cwd":"{{cwd}}"}}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-send","status":"completed","_meta":{"terminal_output":{"terminal_id":"pty-send","data":"K\ndsh> \n[wait: stdin_read]\n[session: running]\n[output truncated]"}}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-read","title":"Read terminal pty-1","kind":"read","status":"in_progress","rawInput":{"sessionId":"pty-1","offset":0,"count":20}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-read","status":"completed","content":[{"type":"content","content":{"type":"text","text":"dsh> printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[lines: 0-3 of 3]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-signal","title":"Signal terminal pty-missing","kind":"execute","status":"in_progress","rawInput":{"sessionId":"pty-missing","signal":"SIGINT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-signal","status":"failed","content":[{"type":"content","content":{"type":"text","text":"Error: unknown PTY session pty-missing"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-kill","title":"Close terminal pty-1","kind":"delete","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-kill","status":"completed","content":[{"type":"content","content":{"type":"text","text":"closed terminal session pty-1"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-list","title":"List terminal sessions","kind":"read","status":"in_progress"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-list","status":"completed","content":[{"type":"content","content":{"type":"text","text":"(no terminal sessions)"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/pty-tools/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/pty-tools/tool-schemas.expected.json
index 529b1419da..e9f7a2ea63 100644
--- a/examples/acp-agent/tests/snapshots/pty-tools/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/pty-tools/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -170,22 +107,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/reject-extra-dirs/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/reject-extra-dirs/stdout.expected.jsonl
index b715cabc47..018593abb5 100644
--- a/examples/acp-agent/tests/snapshots/reject-extra-dirs/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/reject-extra-dirs/stdout.expected.jsonl
@@ -1,2 +1,2 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"error":{"code":-32602,"message":"Invalid params: additionalDirectories is not supported in this MVP"}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"error":{"code":-32602,"message":"Invalid params: additionalDirectories is not supported"}}
diff --git a/examples/acp-agent/tests/snapshots/repeat-tool-guard/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/repeat-tool-guard/stdout.expected.jsonl
index e2bc1c699a..2f80460389 100644
--- a/examples/acp-agent/tests/snapshots/repeat-tool-guard/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/repeat-tool-guard/stdout.expected.jsonl
@@ -1,21 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Write the todo list 'watch","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_1","title":"Update todo list","kind":"other","status":"in_progress","rawInput":[{"content":"watch the kettle boil","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"plan","entries":[{"content":"watch the kettle boil","priority":"medium","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_1","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_2","title":"Update todo list","kind":"other","status":"in_progress","rawInput":[{"content":"watch the kettle boil","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"plan","entries":[{"content":"watch the kettle boil","priority":"medium","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_2","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_3","title":"Update todo list","kind":"other","status":"in_progress","rawInput":[{"content":"watch the kettle boil","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"plan","entries":[{"content":"watch the kettle boil","priority":"medium","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_3","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_4","title":"Update todo list","kind":"other","status":"in_progress","rawInput":[{"content":"watch the kettle boil","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"plan","entries":[{"content":"watch the kettle boil","priority":"medium","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_4","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_5","title":"Update todo list","kind":"other","status":"in_progress","rawInput":[{"content":"watch the kettle boil","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"plan","entries":[{"content":"watch the kettle boil","priority":"medium","status":"in_progress"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_5","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE."}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/session-sandbox-root/input.json b/examples/acp-agent/tests/snapshots/session-sandbox-root/input.json
index 9cef40f51d..3d7f41167e 100644
--- a/examples/acp-agent/tests/snapshots/session-sandbox-root/input.json
+++ b/examples/acp-agent/tests/snapshots/session-sandbox-root/input.json
@@ -2,7 +2,6 @@
   "steps": [
     { "op": "initialize" },
     { "op": "newSession" },
-    { "op": "setConfigOption", "configId": "permission", "value": "workspace-write" },
     { "op": "prompt", "text": "Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE." }
   ]
 }
diff --git a/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl b/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
index e92adbafb9..488de0eebf 100644
--- a/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
@@ -1,27 +1,24 @@
 {"type":"session","version":0,"id":"00000000-0000-0000-0000-000000000000","createdAt":0,"cwd":"/Users/cty/acp-snap-cwd-MABAjO","delegationDepth":0}
 {"type":"turn/start","seq":0,"time":1784567324138,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"permission/preset","seq":1,"time":1784567324138,"data":{"preset":"workspace-write"}}
-{"type":"sandbox/mode","seq":2,"time":1784567324138,"data":{"mode":"workspace-write"}}
-{"type":"approval/policy","seq":3,"time":1784567324138,"data":{"policy":"ask"}}
-{"type":"user/message","seq":4,"time":1784567324138,"data":{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE."}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1784567324138,"data":{"title":"Use the write tool (NOT","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":6,"time":1784567324142,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":7,"time":1784567324142,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":8,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":9,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_session_root","name":"write","argumentsDelta":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}
-{"type":"assistant/chunk","seq":10,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}}
-{"type":"assistant/chunk","seq":11,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":12,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":13,"time":1784567324144,"data":{"turn":1,"step":1,"content":[{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}
-{"type":"tool/call","seq":14,"time":1784567324145,"data":{"turn":1,"step":1,"callId":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}
-{"type":"tool/result","seq":15,"time":1784567324155,"data":{"turn":1,"step":1,"callId":"call_session_root","content":[{"type":"text","text":"<path>/Users/cty/acp-snap-cwd-MABAjO/session-root.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false,"meta":{"diffs":[]}},"sourceEventSeqs":[14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":1784567324157,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":17,"time":1784567324157,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":18,"time":1784567324157,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":19,"time":1784567324157,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
-{"type":"assistant/chunk","seq":20,"time":1784567324158,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
-{"type":"assistant/chunk","seq":21,"time":1784567324158,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
-{"type":"assistant/chunk","seq":22,"time":1784567324158,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":23,"time":1784567324158,"data":{"turn":1,"step":2,"content":[{"type":"text","text":"DONE"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[18,19,20,21,22],"surfaceOp":"append"}
-{"type":"step/end","seq":24,"time":1784567324158,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":25,"time":1784567324158,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"user/message","seq":1,"time":1784821266392,"data":{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE."}],"source":{"kind":"user"}},"surfaceOp":"append"}
+{"type":"session/title","seq":2,"time":1784821266392,"data":{"title":"Use the write tool (NOT","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"step/start","seq":3,"time":1784821266397,"data":{"turn":1,"step":1}}
+{"type":"request/header","seq":4,"time":1784821266398,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"assistant/chunk","seq":5,"time":1784821266418,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":6,"time":1784821266418,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_session_root","name":"write","argumentsDelta":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}
+{"type":"assistant/chunk","seq":7,"time":1784821266418,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}}
+{"type":"assistant/chunk","seq":8,"time":1784821266418,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":9,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":10,"time":1784821266419,"data":{"turn":1,"step":1,"content":[{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[5,6,7,8,9],"surfaceOp":"append"}
+{"type":"tool/call","seq":11,"time":1784821266419,"data":{"turn":1,"step":1,"callId":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}
+{"type":"tool/result","seq":12,"time":1784821266431,"data":{"turn":1,"step":1,"callId":"call_session_root","content":[{"type":"text","text":"<path>/Users/cty/acp-snap-cwd-MABAjO/session-root.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false,"meta":{"diffs":[]}},"sourceEventSeqs":[11],"surfaceOp":"append"}
+{"type":"step/end","seq":13,"time":1784821266436,"data":{"turn":1,"step":1}}
+{"type":"step/start","seq":14,"time":1784821266436,"data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","seq":15,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":16,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","seq":17,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","seq":18,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
+{"type":"assistant/chunk","seq":19,"time":1784567324157,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":20,"time":1784821266442,"data":{"turn":1,"step":2,"content":[{"type":"text","text":"DONE"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[15,16,17,18,19],"surfaceOp":"append"}
+{"type":"step/end","seq":21,"time":1784821266446,"data":{"turn":1,"step":2}}
+{"type":"turn/end","seq":22,"time":1784821266446,"data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/session-sandbox-root/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/session-sandbox-root/stdout.expected.jsonl
index 6ba40a0980..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/session-sandbox-root/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-sandbox-root/stdout.expected.jsonl
@@ -1,9 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","id":3,"result":{"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"workspace-write","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the write tool (NOT","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_session_root","title":"Write session-root.txt","kind":"edit","status":"in_progress","locations":[{"path":"session-root.txt"}],"content":[{"type":"diff","path":"session-root.txt","oldText":null,"newText":"session root"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_session_root","status":"completed","content":[{"type":"diff","path":"session-root.txt","oldText":null,"newText":"session root"}],"title":"Write session-root.txt"}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
-{"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/skill-load/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/skill-load/stdout.expected.jsonl
index 3f6f1dd3fe..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/skill-load/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/skill-load/stdout.expected.jsonl
@@ -1,10 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Load the snapshot-skill skill with","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Load the requested skill."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_skill_load","title":"Load skill snapshot-skill","kind":"read","status":"in_progress","rawInput":"snapshot-skill"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_skill_load","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<skill_content name=\"snapshot-skill\">\n<skill_resources>\nBase directory for this skill: {{cwd}}/.dsh/skills/snapshot-skill\nResolve relative paths mentioned by this skill against the base directory before using them. Load referenced resources only as needed.\n</skill_resources>\n\n<skill_instructions>\nFollow these snapshot-only instructions.\nResolve referenced resources relative to this skill directory.\n</skill_instructions>\n</skill_content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The skill is loaded."}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/skill-load/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/skill-load/tool-schemas.expected.json
index b01e7683d1..d4973bfea4 100644
--- a/examples/acp-agent/tests/snapshots/skill-load/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/skill-load/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -170,22 +107,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/stdout.expected.jsonl
index 4e9be47961..c00054c284 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/stdout.expected.jsonl
@@ -1,8 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Delegate through two child generations.","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_root_child","title":"subagent","kind":"other","status":"in_progress","rawInput":{"description":"Start depth one","prompt":"Call subagent once. Ask that child to attempt one further subagent call, then report the result."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_root_child","status":"completed","content":[{"type":"content","content":{"type":"text","text":"DEPTH_ONE_DONE"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ROOT_DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-fork/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/subagent-fork/stdout.expected.jsonl
index 931b77892e..0350e89204 100644
--- a/examples/acp-agent/tests/snapshots/subagent-fork/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-fork/stdout.expected.jsonl
@@ -1,120 +1,6 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Remember this fact for later:","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" remember"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cod"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ew"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ord"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"M"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ARM"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ADE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"OK"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sub"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_f"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ork"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" delegate"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" question"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" child"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" child"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" inher"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"its"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" conversation"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" should"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" be"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" able"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" answer"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" project"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cod"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ew"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ord"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" is"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" MAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"M"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ADE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" After"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sub"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returns"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" should"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" for"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" child"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" correctly"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ADE"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PAR"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PARENT_DONE"}}}}
 {"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/stdout.expected.jsonl
index 24eb9856a0..0350e89204 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/stdout.expected.jsonl
@@ -1,171 +1,6 @@
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" First"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"fresh"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" child"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"P"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"HA"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Second"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"fork"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"RON"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" asked"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" remember"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"SA"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"FF"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"RON"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\".\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" as"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instructed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PARENT_DONE"}}}}
 {"jsonrpc":"2.0","id":4,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/stdout.expected.jsonl
index 9693ed051a..a460e019d4 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/stdout.expected.jsonl
@@ -1,115 +1,4 @@
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the subagent tool TWICE,","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"one"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" first"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"AL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"P"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"HA"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" second"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"B"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ETA"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" should"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PARENT_DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-spawn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/subagent-spawn/stdout.expected.jsonl
index 37af99ca19..a460e019d4 100644
--- a/examples/acp-agent/tests/snapshots/subagent-spawn/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-spawn/stdout.expected.jsonl
@@ -1,108 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the subagent tool exactly","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sub"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" once"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" delegate"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" task"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" CH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ILD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" nothing"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" else"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".\"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" After"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sub"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returns"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"3"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Do"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" not"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" do"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" this"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_gVbLWC12Qu8JheZpVRRz8749","title":"subagent","kind":"other","status":"in_progress","rawInput":{"description":"Reply with CHILD_OK","prompt":"Reply with exactly the word CHILD_OK and nothing else."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_gVbLWC12Qu8JheZpVRRz8749","status":"completed","content":[{"type":"content","content":{"type":"text","text":"CHILD_OK"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" sub"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"agent"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returned"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"CH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ILD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" as"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" expected"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PAR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ENT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PARENT_DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/text-turn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/text-turn/stdout.expected.jsonl
index 6bbcf7d91d..acfccdd778 100644
--- a/examples/acp-agent/tests/snapshots/text-turn/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/text-turn/stdout.expected.jsonl
@@ -1,27 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Reply with exactly the word:","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"P"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONG"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" not"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" any"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tools"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"P"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONG"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"PONG"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/text-turn/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/text-turn/tool-schemas.expected.json
index b01e7683d1..d4973bfea4 100644
--- a/examples/acp-agent/tests/snapshots/text-turn/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/text-turn/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -170,22 +107,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/todo-plan/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/todo-plan/stdout.expected.jsonl
deleted file mode 100644
index d699c3de1c..0000000000
--- a/examples/acp-agent/tests/snapshots/todo-plan/stdout.expected.jsonl
+++ /dev/null
@@ -1,62 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the todo_write tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" todo"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_write"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" record"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" plan"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" three"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" todos"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" in"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" specified"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" status"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"es"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_fjAnBThbDjxepBtp3hDt3264","title":"Update todo list","kind":"other","status":"in_progress","rawInput":[{"content":"read the code","status":"in_progress"},{"content":"write the fix","status":"pending"},{"content":"run the tests","status":"pending"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"plan","entries":[{"content":"read the code","priority":"medium","status":"in_progress"},{"content":"write the fix","priority":"medium","status":"pending"},{"content":"run the tests","priority":"medium","status":"pending"}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_fjAnBThbDjxepBtp3hDt3264","status":"completed","content":[{"type":"content","content":{"type":"text","text":"Updated todo list: 2 pending, 1 in progress, 0 completed."}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" todos"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" have"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" been"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" written"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" just"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/todo-plan/input.json b/examples/acp-agent/tests/snapshots/todo-write/input.json
similarity index 100%
rename from examples/acp-agent/tests/snapshots/todo-plan/input.json
rename to examples/acp-agent/tests/snapshots/todo-write/input.json
diff --git a/examples/acp-agent/tests/snapshots/todo-plan/session.jsonl b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
similarity index 100%
rename from examples/acp-agent/tests/snapshots/todo-plan/session.jsonl
rename to examples/acp-agent/tests/snapshots/todo-write/session.jsonl
diff --git a/examples/acp-agent/tests/snapshots/todo-write/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/todo-write/stdout.expected.jsonl
new file mode 100644
index 0000000000..82ae8907ca
--- /dev/null
+++ b/examples/acp-agent/tests/snapshots/todo-write/stdout.expected.jsonl
@@ -0,0 +1,4 @@
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/tool-call-turn/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/tool-call-turn/stdout.expected.jsonl
index a72dbc43ed..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/tool-call-turn/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/tool-call-turn/stdout.expected.jsonl
@@ -1,51 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the bash tool to","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" run"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" specific"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" bash"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_Rn2Mz1y8uZN62ukEXiNO2077","title":"echo SNAPSHOT_OK","kind":"execute","status":"in_progress","rawInput":"echo SNAPSHOT_OK","content":[{"type":"content","content":{"type":"text","text":"Run echo SNAPSHOT_OK"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_Rn2Mz1y8uZN62ukEXiNO2077","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nSNAPSHOT_OK\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" command"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" executed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" printed"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" S"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"NA"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"PS"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"H"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OT"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" single"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/workflow-run/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/workflow-run/stdout.expected.jsonl
index aa0cac2140..bdf91164ff 100644
--- a/examples/acp-agent/tests/snapshots/workflow-run/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/workflow-run/stdout.expected.jsonl
@@ -1,130 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Use the workflow tool exactly","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" use"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" workflow"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" tool"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" once"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" specific"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" parameters"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" carefully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" follow"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" instructions"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" args"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ("}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"so"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" don"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"'t"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" include"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":")\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" meta"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ="}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" {"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"name"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"sn"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"apshot"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"-flow"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"description"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\":"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"one"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" child"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" for"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" snapshot"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" }\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"3"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" script"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" ="}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" as"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" given"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" verb"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"atim"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"4"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" After"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returns"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WORK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"FL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OW"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" do"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" that"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_dD2BLuNeJCTh2iiYC1QR3449","title":"workflow: snapshot-flow","kind":"other","status":"in_progress","rawInput":"\nphase('Run')\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\nreturn { reply }\n"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_dD2BLuNeJCTh2iiYC1QR3449","status":"completed","content":[{"type":"content","content":{"type":"text","text":"workflow \"snapshot-flow\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WF_CHILD_OK\"\n}"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" workflow"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" returned"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" successfully"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WF"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_CH"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ILD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_OK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" exactly"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WORK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"FL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"OW"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" and"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" stop"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"WORK"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"FL"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"OW"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"_D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"WORKFLOW_DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/workspace-context/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/workspace-context/stdout.expected.jsonl
index b19fa5bbac..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/workspace-context/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/workspace-context/stdout.expected.jsonl
@@ -1,8 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Read nested/task.txt with the read","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_workspace_read","title":"Read nested/task.txt","kind":"read","status":"in_progress","locations":[{"path":"nested/task.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_workspace_read","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/nested/task.txt</path>\n<type>file</type>\n<content>\n1: snapshot task\n\n(End of file - total 1 lines)\n</content>"}}]}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
 {"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/workspace-context/tool-schemas.expected.json b/examples/acp-agent/tests/snapshots/workspace-context/tool-schemas.expected.json
index b01e7683d1..d4973bfea4 100644
--- a/examples/acp-agent/tests/snapshots/workspace-context/tool-schemas.expected.json
+++ b/examples/acp-agent/tests/snapshots/workspace-context/tool-schemas.expected.json
@@ -1,68 +1,5 @@
 {
   "initial": [
-    {
-      "name": "ask_user_question",
-      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "questions": {
-            "type": "array",
-            "description": "Questions to ask the user before continuing.",
-            "items": {
-              "type": "object",
-              "additionalProperties": true,
-              "properties": {
-                "id": {
-                  "type": "string",
-                  "description": "Stable id for this question; echoed in the answer."
-                },
-                "question": {
-                  "type": "string",
-                  "description": "The specific question to ask the user."
-                },
-                "header": {
-                  "type": "string",
-                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
-                },
-                "options": {
-                  "type": "array",
-                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
-                  "items": {
-                    "type": "object",
-                    "additionalProperties": true,
-                    "properties": {
-                      "label": {
-                        "type": "string",
-                        "description": "Short user-facing option label."
-                      },
-                      "description": {
-                        "type": "string",
-                        "description": "One sentence explaining the tradeoff or impact."
-                      }
-                    },
-                    "required": [
-                      "label"
-                    ]
-                  }
-                },
-                "multi_select": {
-                  "type": "boolean",
-                  "description": "Whether the user may select more than one option. Defaults to false."
-                }
-              },
-              "required": [
-                "id",
-                "question"
-              ]
-            }
-          }
-        },
-        "required": [
-          "questions"
-        ]
-      }
-    },
     {
       "name": "bash",
       "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
@@ -170,22 +107,6 @@
         ]
       }
     },
-    {
-      "name": "exit_plan_mode",
-      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
-      "parameters": {
-        "type": "object",
-        "properties": {
-          "plan": {
-            "type": "string",
-            "description": "The complete plan, as markdown, starting with a # heading that names it."
-          }
-        },
-        "required": [
-          "plan"
-        ]
-      }
-    },
     {
       "name": "get_goal",
       "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
diff --git a/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.jsonl b/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.jsonl
index 1b2c49322e..82ae8907ca 100644
--- a/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.jsonl
+++ b/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.jsonl
@@ -1,134 +1,4 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"sessionCapabilities":{"list":{}},"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"A file named greeting.txt in","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" greeting"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Append"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" WORLD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" as"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" a"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" second"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" line"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"3"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cat"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" confirm"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"4"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" start"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" by"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reading"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" see"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" its"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" contents"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_OjRFB4zvxu6UALDjytZD0978","title":"Read greeting.txt","kind":"read","status":"in_progress","locations":[{"path":"greeting.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_OjRFB4zvxu6UALDjytZD0978","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}/greeting.txt</path>\n<type>file</type>\n<content>\n1: hello\n\n(End of file - total 1 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" contains"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" on"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" one"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" line"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" append"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" second"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WOR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cat"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" confirm"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_IUUvbNiPcnwhVL8ErEFS4806","title":"printf '\\nWORLD' >> greeting.txt","kind":"execute","status":"in_progress","rawInput":"printf '\\nWORLD' >> greeting.txt","content":[{"type":"content","content":{"type":"text","text":"Append newline and WORLD to greeting.txt"}}]}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" now"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cat"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_Wo4H7tFNheZJWKVDrAHK5851","title":"cat greeting.txt","kind":"execute","status":"in_progress","rawInput":"cat greeting.txt","content":[{"type":"content","content":{"type":"text","text":"Read greeting.txt to confirm"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_Wo4H7tFNheZJWKVDrAHK5851","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nhello\n\nWORLD\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" has"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" two"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" WORLD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"I"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
 {"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.windows.jsonl b/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.windows.jsonl
deleted file mode 100644
index 97f673b81f..0000000000
--- a/examples/acp-agent/tests/snapshots/workspace-edit/stdout.expected.windows.jsonl
+++ /dev/null
@@ -1,134 +0,0 @@
-{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
-{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-flash\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter or leave plan mode","input":{"hint":"[off|message]"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"A file named greeting.txt in","updatedAt":"{{updatedAt}}"}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" user"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" wants"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" greeting"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":".txt"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Append"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" word"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" WORLD"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Read"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_OjRFB4zvxu6UALDjytZD0978","title":"Read greeting.txt","kind":"read","status":"in_progress","locations":[{"path":"greeting.txt","line":1}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_OjRFB4zvxu6UALDjytZD0978","status":"completed","content":[{"type":"content","content":{"type":"text","text":"<path>{{cwd}}\\greeting.txt</path>\n<type>file</type>\n<content>\n1: hello\n\n(End of file - total 1 lines)\n</content>"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" need"}}}}
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-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" \""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"WOR"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"LD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\""}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" Then"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cat"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" it"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" to"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" confirm"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_IUUvbNiPcnwhVL8ErEFS4806","title":"printf '\\nWORLD' >> greeting.txt","kind":"execute","status":"in_progress","rawInput":"printf '\\nWORLD' >> greeting.txt","content":[{"type":"content","content":{"type":"text","text":"Append newline and WORLD to greeting.txt"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_IUUvbNiPcnwhVL8ErEFS4806","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\n(no output)\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"Good"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":","}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" let"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" me"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" read"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" the"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" back"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" cat"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"call_00_Wo4H7tFNheZJWKVDrAHK5851","title":"cat greeting.txt","kind":"execute","status":"in_progress","rawInput":"cat greeting.txt","content":[{"type":"content","content":{"type":"text","text":"Read greeting.txt to confirm"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"call_00_Wo4H7tFNheZJWKVDrAHK5851","status":"completed","content":[{"type":"content","content":{"type":"text","text":"```console\nhello\n\nWORLD\n```"}}]}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"The"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" file"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" now"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" has"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" two"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" lines"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":":\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"1"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" hello"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"2"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" WORLD"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"\n\n"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"I"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" can"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" reply"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" with"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":" D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_thought_chunk","content":{"type":"text","text":"."}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"D"}}}}
-{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"ONE"}}}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/headless-agent/semantic-checkpoint.cordis.snapshot.yml b/examples/headless-agent/semantic-checkpoint.cordis.snapshot.yml
new file mode 100644
index 0000000000..fc7959e25d
--- /dev/null
+++ b/examples/headless-agent/semantic-checkpoint.cordis.snapshot.yml
@@ -0,0 +1,37 @@
+# Keyless real-Loader composition for the semantic-checkpoint recovery snapshot.
+# The headless driver resumes the seeded interrupted session and emits its next
+# turn over stream-json; the replay adapter supplies the deterministic response.
+
+- id: persistence
+  name: '@deepseek-ai/dsh-session-persistence-jsonl'
+  config:
+    root: './.sessions'
+    compression: none
+
+- id: checkpoint
+  name: '@deepseek-ai/dsh-session-checkpoint-policy'
+
+- id: replay
+  name: '@deepseek-ai/dsh-llm-replay'
+  config:
+    file: !!js process.env.DSH_SNAPSHOT_FILE
+    overrideFile: !!js process.env.DSH_SNAPSHOT_OVERRIDE
+
+- id: bash
+  name: '@deepseek-ai/dsh-bash-local'
+  config:
+    timeoutMs: 60000
+
+- id: agent
+  name: '@deepseek-ai/dsh-agent-spine-demo'
+  config:
+    agents: []
+    workspaceContext: false
+    skills:
+      enabled: false
+    toolTasks: false
+    goals: false
+
+# Await the persisted resume before the headless driver inspects root agents.
+- id: resumed-agent
+  name: './tests/fixtures/semantic-checkpoint-agent.ts'
diff --git a/examples/headless-agent/tests/fixtures/semantic-checkpoint-agent.ts b/examples/headless-agent/tests/fixtures/semantic-checkpoint-agent.ts
new file mode 100644
index 0000000000..58a1bedee9
--- /dev/null
+++ b/examples/headless-agent/tests/fixtures/semantic-checkpoint-agent.ts
@@ -0,0 +1,25 @@
+/**
+ * Loader fixture that publishes the semantic-checkpoint session before CLI dispatch.
+ * @module semantic-checkpoint-agent
+ */
+
+import type { Context } from 'cordis'
+import type { SessionId } from '@deepseek-ai/dsh-session'
+
+/** Fixture plugin name. */
+export const name = 'semantic-checkpoint-agent'
+/** Services that must exist before the fixture resumes its agent. */
+export const inject = ['agents', 'agentLoop', 'sessionPersistence']
+
+/**
+ * Resume the seeded session and bind its exact handle to this fixture's lifetime.
+ * @param ctx - settled agent and persistence services from the Loader tree.
+ * @returns after the resumed agent is published.
+ */
+export async function apply(ctx: Context): Promise<void> {
+  const handle = await ctx.agents.resume({
+    resumeSessionId: 'semantic-checkpoint-unknown-outcome' as SessionId,
+    agentOptions: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+  })
+  ctx.effect(() => () => handle.dispose(), 'semantic-checkpoint-agent.handle')
+}
diff --git a/examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.jsonl b/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.jsonl
similarity index 100%
rename from examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.jsonl
rename to examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.jsonl
diff --git a/examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.override.json b/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.override.json
similarity index 100%
rename from examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.override.json
rename to examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/replay.override.json
diff --git a/examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl b/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
similarity index 100%
rename from examples/acp-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
rename to examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
diff --git a/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts b/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
new file mode 100644
index 0000000000..519541117d
--- /dev/null
+++ b/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
@@ -0,0 +1,113 @@
+import { readFile, writeFile } from 'node:fs/promises'
+import { dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { Context } from 'cordis'
+import { normalizeSessionLog, scrubRequestHeaders, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
+import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
+import { CallId } from '@deepseek-ai/dsh-llm'
+import SessionStore, { SESSION_FORMAT_VERSION, SessionId, type SessionEvent, type SessionHeader } from '@deepseek-ai/dsh-session'
+import SessionPersistenceJsonl from '@deepseek-ai/dsh-session-persistence-jsonl'
+import { describe, expect, it } from 'vitest'
+
+const fixtureDir = join(dirname(fileURLToPath(import.meta.url)), 'semantic-checkpoint-snapshots/tool-outcome-unknown')
+const replayFixture = join(fixtureDir, 'replay.jsonl')
+const replayOverride = join(fixtureDir, 'replay.override.json')
+const sessionExpected = join(fixtureDir, 'session.expected.jsonl')
+const configPath = fileURLToPath(new URL('../semantic-checkpoint.cordis.snapshot.yml', import.meta.url))
+const binScript = fileURLToPath(new URL('../../../packages/examples/cli-demo/src/bin.ts', import.meta.url))
+const tsconfigPath = fileURLToPath(new URL('../../../tsconfig.json', import.meta.url))
+const sessionId = SessionId('semantic-checkpoint-unknown-outcome')
+const refreshing = process.env.DSH_SNAPSHOT === 'refresh'
+const task = 'Continue safely from the interrupted operation.'
+
+async function seedInterruptedSession(root: string, cwd: string): Promise<string> {
+  const ctx = new Context()
+  await ctx.plugin(SessionStore)
+  await ctx.plugin(SessionPersistenceJsonl, { root, compression: 'none' })
+  const meta: SessionHeader = {
+    version: SESSION_FORMAT_VERSION,
+    id: sessionId,
+    createdAt: 1,
+    cwd,
+    delegationDepth: 0,
+  }
+  const events: SessionEvent[] = [
+    { type: 'turn/start', seq: 0, time: 10, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
+    { type: 'user/message', seq: 1, time: 11, data: { content: [{ type: 'text', text: 'Perform one side-effecting remote mutation.' }], source: { kind: 'user' } }, surfaceOp: 'append' },
+    { type: 'step/start', seq: 2, time: 12, data: { turn: 1, step: 1 } },
+    {
+      type: 'assistant/message',
+      seq: 3,
+      time: 13,
+      data: {
+        turn: 1,
+        step: 1,
+        content: [{ type: 'tool-call', id: CallId('unknown-outcome-call'), name: 'write_remote', arguments: '{"value":1}' }],
+        provenance: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      },
+      surfaceOp: 'append',
+    },
+    {
+      type: 'tool/call',
+      seq: 4,
+      time: 14,
+      data: {
+        turn: 1,
+        step: 1,
+        callId: CallId('unknown-outcome-call'),
+        name: 'write_remote',
+        arguments: '{"value":1}',
+      },
+    },
+  ]
+  try {
+    await ctx.sessionPersistence.create(meta)
+    await ctx.sessionPersistence.append(sessionId, events)
+    const location = ctx.sessionPersistence.locate(meta)
+    if (location === undefined) throw new Error('JSONL backend did not locate the seeded session')
+    return location.path
+  } finally {
+    await ctx.fiber.dispose()
+  }
+}
+
+describe('semantic checkpoint recovery snapshot', () => {
+  it('resumes an unknown tool outcome through the headless stream-json app', async () => {
+    let cwd = ''
+    let sessionPath = ''
+    const result = await runLoaderSmoke({
+      label: 'semantic checkpoint headless stream-json snapshot',
+      tempDirPrefix: 'dsh-semantic-snapshot-',
+      binScript,
+      configPath,
+      binArgs: ['--config', configPath, '--output-format', 'stream-json', task],
+      tsconfigPath,
+      env: {
+        DSH_SNAPSHOT_FILE: replayFixture,
+        DSH_SNAPSHOT_OVERRIDE: replayOverride,
+      },
+      prepare: async (runCwd) => {
+        cwd = runCwd
+        sessionPath = await seedInterruptedSession(join(runCwd, '.sessions'), runCwd)
+      },
+      inspect: async () => {
+        const normalization: NormalizeContext = { sessionIds: [sessionId], cwd }
+        const session = scrubRequestHeaders(normalizeSessionLog(await readFile(sessionPath, 'utf8'), normalization))
+        if (refreshing) await writeFile(sessionExpected, session)
+        expect(session).toBe(await readFile(sessionExpected, 'utf8'))
+        expect(session).toContain('TOOL_OUTCOME_UNKNOWN')
+        expect(session).toContain('Do not retry blindly.')
+      },
+    })
+
+    expect(result.stderr).toBe('')
+    const records = result.stdout.trimEnd().split('\n').map(line => JSON.parse(line) as Record<string, unknown>)
+    expect(records.at(-1)).toMatchObject({
+      type: 'result',
+      success: true,
+      sessionId,
+      result: 'I will verify the external state before deciding whether to retry the side-effecting operation.',
+      reason: { kind: 'completed' },
+    })
+  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
+})
diff --git a/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl b/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
index d91782e1e2..99eaf6e4ee 100644
--- a/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
@@ -3,7 +3,7 @@
 {"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"}},"surfaceOp":"append"}
 {"type":"session/title","seq":2,"time":0,"data":{"title":"Exercise the six PTY tools","messageSeqs":[1],"source":{"kind":"fallback"}}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":4,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by the DeepSeek Harness SDK.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model.\n\nVerify your work by running the code or tests. Keep answers brief and\nfactual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nUse a terminal session only when work needs persistent terminal state or interactive stdin; prefer bash/read/write/edit for bounded one-shot operations. Track every terminal session id and close sessions that no longer matter. An inferred_idle or timeout result does not prove the foreground command exited.\n\nTrack every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."}},"required":["command","description"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Run as a background task and return its id; collect with task_output or stop with task_kill."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."},"run_in_background":{"type":"boolean","description":"Run as a background task and return its id; collect with task_output or stop with task_kill."}},"required":["description","prompt"]}},{"name":"task_kill","description":"Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"task_id":{"type":"string","description":"Task id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the task."}},"required":["task_id"]}},{"name":"task_list","description":"List your background tasks (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"task_output","description":"Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"task_id":{"type":"string","description":"Task id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["task_id"]}},{"name":"terminal_close","description":"Close one persistent terminal and wait until its captured owned process tree is gone.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."}},"required":["sessionId"]}},{"name":"terminal_list","description":"List persistent terminal sessions owned by the current agent.","parameters":{"type":"object","properties":{}}},{"name":"terminal_open","description":"Create a persistent, owner-isolated terminal session from a registered backend type. Use this for shell or REPL state that must survive across tool calls.","parameters":{"type":"object","properties":{"type":{"type":"string","description":"Registered terminal backend type, usually \"shell\"."},"name":{"type":"string","description":"Optional owner-local display name such as \"main\" or \"gdb\"."},"cwd":{"type":"string","description":"Initial working directory. Defaults to the deployment workspace root."}},"required":["type"]}},{"name":"terminal_read","description":"Read a bounded page of retained output from a persistent terminal without sending input.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"offset":{"type":"number","description":"Newest-relative line offset (default 0)."},"count":{"type":"number","description":"Requested line count (default 500; backend caps apply)."}},"required":["sessionId"]}},{"name":"terminal_send","description":"Send text to a persistent terminal. By default Enter is submitted and the call waits for a prompt, stdin wait, output silence, timeout, or session exit. Background mode returns a task id for task_output/task_kill.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id returned by terminal_open or terminal_list."},"text":{"type":"string","description":"UTF-8 text to write to the terminal."},"submit":{"type":"boolean","description":"Submit Enter after text (default true). Set false for control characters or incomplete REPL input."},"run_in_background":{"type":"boolean","description":"Return a task id immediately; collect with task_output or stop with task_kill."}},"required":["sessionId","text"]}},{"name":"terminal_signal","description":"Send an allowed signal to the current foreground process group of a persistent terminal.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"signal":{"type":"string","description":"Signal to deliver. Shell-targeted SIGKILL is rejected; use terminal_close.","enum":["SIGINT","SIGTERM","SIGKILL","SIGTSTP","SIGHUP"]}},"required":["sessionId","signal"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const — no oneOf/pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]})."}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
+{"type":"request/header","seq":4,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by the DeepSeek Harness SDK.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model.\n\nVerify your work by running the code or tests. Keep answers brief and\nfactual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nUse a terminal session only when work needs persistent terminal state or interactive stdin; prefer bash/read/write/edit for bounded one-shot operations. Track every terminal session id and close sessions that no longer matter. An inferred_idle or timeout result does not prove the foreground command exited.\n\nTrack every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."}},"required":["command","description"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Run as a background task and return its id; collect with task_output or stop with task_kill."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."},"run_in_background":{"type":"boolean","description":"Run as a background task and return its id; collect with task_output or stop with task_kill."}},"required":["description","prompt"]}},{"name":"task_kill","description":"Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"task_id":{"type":"string","description":"Task id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the task."}},"required":["task_id"]}},{"name":"task_list","description":"List your background tasks (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"task_output","description":"Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"task_id":{"type":"string","description":"Task id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["task_id"]}},{"name":"terminal_close","description":"Close one persistent terminal and wait until its captured owned process tree is gone.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."}},"required":["sessionId"]}},{"name":"terminal_list","description":"List persistent terminal sessions owned by the current agent.","parameters":{"type":"object","properties":{}}},{"name":"terminal_open","description":"Create a persistent, owner-isolated terminal session from a registered backend type. Use this for shell or REPL state that must survive across tool calls.","parameters":{"type":"object","properties":{"type":{"type":"string","description":"Registered terminal backend type, usually \"shell\"."},"name":{"type":"string","description":"Optional owner-local display name such as \"main\" or \"gdb\"."},"cwd":{"type":"string","description":"Initial working directory. Defaults to the deployment workspace root."}},"required":["type"]}},{"name":"terminal_read","description":"Read a bounded page of retained output from a persistent terminal without sending input.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"offset":{"type":"number","description":"Newest-relative line offset (default 0)."},"count":{"type":"number","description":"Requested line count (default 500; backend caps apply)."}},"required":["sessionId"]}},{"name":"terminal_send","description":"Send text to a persistent terminal. By default Enter is submitted and the call waits for a prompt, stdin wait, output silence, timeout, or session exit. Background mode returns a task id for task_output/task_kill.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id returned by terminal_open or terminal_list."},"text":{"type":"string","description":"UTF-8 text to write to the terminal."},"submit":{"type":"boolean","description":"Submit Enter after text (default true). Set false for control characters or incomplete REPL input."},"run_in_background":{"type":"boolean","description":"Return a task id immediately; collect with task_output or stop with task_kill."}},"required":["sessionId","text"]}},{"name":"terminal_signal","description":"Send an allowed signal to the current foreground process group of a persistent terminal.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"signal":{"type":"string","description":"Signal to deliver. Shell-targeted SIGKILL is rejected; use terminal_close.","enum":["SIGINT","SIGTERM","SIGKILL","SIGTSTP","SIGHUP"]}},"required":["sessionId","signal"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":true,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
 {"type":"assistant/chunk","seq":5,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
 {"type":"assistant/chunk","seq":6,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-spawn","name":"terminal_open","argumentsDelta":"{\"type\":\"shell\",\"name\":\"main\"}"}}}
 {"type":"assistant/chunk","seq":7,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}}}}
diff --git a/knip.json b/knip.json
index 7d84c5b67b..1cc47f05e1 100644
--- a/knip.json
+++ b/knip.json
@@ -28,6 +28,7 @@
     "examples": {
       "entry": [
         "headless-agent/tests/fixtures/cli-mock-llm.ts",
+        "headless-agent/tests/fixtures/semantic-checkpoint-agent.ts",
         "headless-agent/tests/fixtures/goal-domain/seed-goal.ts",
         "headless-agent/tests/fixtures/time-context-driver.ts",
         "headless-agent/tests/fixtures/time-context-mock-llm.ts",
diff --git a/packages/README.md b/packages/README.md
index 4e18d7b5f8..a347d596fc 100644
--- a/packages/README.md
+++ b/packages/README.md
@@ -35,8 +35,9 @@ Packages live at `packages/<group>/<pkg>/`; groups are containers, while names r
 | [`session-query/`](session-query/README.md) | Session retrieval family: logical corpus, bounded reads, lineage, event relationships, semantic filtering, and SQLite full-text search | Product — stable surface |
 | [`session-title/`](session-title/README.md) | Log-backed session titles: fallback service, shared LLM policy, and opt-in providers | Product — stable surface |
 | [`sdk/`](sdk/README.md) | Project SDK tooling | Product — stable surface |
-| [`ui/`](ui/README.md) | Editor/client integration surfaces: ACP bridge, JSON-RPC SDK server, user-approval/user-interaction seams, ask-user tool | Product — stable surface |
-| [`examples/`](examples/README.md) | Demo bundles (agent-spine + TUI/one-shot CLI/ACP/JSON-RPC bins) the leaves load | Support — example infra |
+| [`acp/`](acp/README.md) | Automation-only Agent Client Protocol server | Product — stable surface |
+| [`ui/`](ui/README.md) | Human/client integrations: TUI and JSON-RPC, approval/interaction seams, ask-user tool | Product — stable surface |
+| [`examples/`](examples/README.md) | Demo bundles (agent-spine + TUI/CLI/ACP/JSON-RPC bins) leaves load | Support — example infra |
 | [`support/`](support/README.md) | Support infrastructure (testkits, invariants, replay, Loader smokes) | Support — lower compatibility expectations |
 | [`util/`](util/README.md) | Low-level zero-dependency utilities shared across groups (`Branded<B>`, Harness home/path helpers, timeout, retention) | Support — small, stable, harness-dep-free |
 
diff --git a/packages/acp/README.md b/packages/acp/README.md
new file mode 100644
index 0000000000..480b15726d
--- /dev/null
+++ b/packages/acp/README.md
@@ -0,0 +1,9 @@
+# acp/ — Agent Client Protocol automation
+
+The ACP group exposes harness agents to programmatic clients. It is an interoperability transport, not a presentation or human-interaction layer.
+
+| Package | Role |
+|---|---|
+| [`acp/`](acp/README.md) | Automation-only ACP server: fresh text sessions, committed assistant output, machine permission policy, cancellation, and connection-owned teardown. |
+
+The matching out-of-process subagent client remains in [`subagent/subagent-acp`](../subagent/subagent-acp/README.md) because it implements the subagent provider interface; arbitrary ACP clients may drive the same server contract.
diff --git a/packages/acp/acp/README.md b/packages/acp/acp/README.md
new file mode 100644
index 0000000000..6a2db4e6ba
--- /dev/null
+++ b/packages/acp/acp/README.md
@@ -0,0 +1,77 @@
+# @deepseek-ai/dsh-acp
+
+Automation-only [Agent Client Protocol](https://agentclientprotocol.com) server over JSON-RPC stdio. Programmatic clients create fresh harness agents, send text prompts, collect committed assistant text, resolve one-shot permission requests by policy, and cancel work. The primary in-repository client is [`dsh-subagent-acp`](../../subagent/subagent-acp/README.md).
+
+This package is a transport adapter, not a UI integration or a capability seam. It does not expose editor navigation, transcript replay, commands, modes, configuration pickers, elicitation, reasoning, plans, titles, or tool presentation. Interactive rendering and human questions belong to the web and TUI modules.
+
+## Plugin
+
+`apply(ctx, config)` opens an `AgentSideConnection` on stdin/stdout and drives `ctx.agents`. Stdout is reserved for protocol frames.
+
+| Config | Default | Meaning |
+|---|---|---|
+| `provider` | — | Initial provider route for every created agent. |
+| `model` | — | Initial model for every created agent. |
+
+Both fields are optional so another agent/request listener may supply the target. The runnable ACP composition requires both.
+
+## Protocol contract
+
+| Method | Behavior |
+|---|---|
+| `initialize` | Negotiates the supported version and advertises text-only prompts. No session, editor, terminal, filesystem, or MCP capability is advertised. |
+| `authenticate` | No-op because the server advertises no authentication methods. |
+| `session/new` | Creates a fresh agent with an absolute primary `cwd`; empty `additionalDirectories` and `mcpServers` are accepted, non-empty values reject. |
+| `session/prompt` | Concatenates text blocks, rejects empty or non-text input, permits one in-flight request per session, and settles from that request's owning durable `turn/end`. |
+| `session/cancel` | Cancels only the addressed agent and settles its pending prompt as `cancelled`; unknown ids are no-ops. |
+| `session/update` | Emits one `agent_message_chunk` per non-empty text block in a committed `assistant/message`. Raw deltas and non-message events are omitted. |
+| `session/request_permission` | Offers one-shot allow/reject choices for bridge-owned approval requests carrying a tool call id. Clients may answer automatically. |
+
+One connection may own several sessions. The bridge keys records by branded session id and checks exact agent identity before routing events or permission requests. Each session has an independent prompt slot, workspace, cancellation path, and disposer.
+
+Committed-message output intentionally trades token-by-token latency for a clean automation result. Uncommitted provider chunks and retry attempts cannot leak partial text; reasoning and tool activity remain in the session log for observability through other interfaces.
+
+## Lifecycle
+
+Client disconnect and Cordis disposal share one memoized teardown. The bridge first rejects new sessions and prompts, settles pending prompts, then disposes all owned agent handles in parallel and awaits their loop/session cleanup. An ACP-only plugin reload therefore leaves no orphan agent.
+
+## Running
+
+`pnpm --dir /path/to/deepseek-harness run demo:acp` boots the repository's automation server composition. A parent harness can spawn it through [`@deepseek-ai/dsh-subagent-acp`](../../subagent/subagent-acp/README.md); other ACP clients need only the core methods above.
+
+## Model Experience
+
+### Prompt text
+
+#### What the model sees
+
+`session/prompt` text blocks are concatenated verbatim into one user message. Protocol metadata, client capabilities, permission choices, and session ids never enter the model request.
+
+#### Token effect
+
+Prompt tokens are data-dependent and remain in that session's history until compaction. Concurrent ACP sessions retain independent contexts.
+
+#### KV Cache effect
+
+Append-only; the new user message follows the reusable request prefix and does not invalidate prior cache entries.
+
+### Permission decisions
+
+#### What the model sees
+
+Nothing directly. The owning tool records its allowed, rejected, cancelled, or unavailable outcome through the normal tool-result path.
+
+#### Token effect
+
+Only the owning tool result contributes tokens.
+
+#### KV Cache effect
+
+Append-only through the owning tool result.
+
+## Known Limitations and Deferred Work
+
+- **Fresh sessions only** — load, list, resume, delete, and fork are unsupported.
+- **Text and one workspace only** — resource links, images, audio, embedded resources, non-empty additional directories, and MCP servers reject.
+- **Committed answers only** — live progress, reasoning, tool activity, plans, titles, and usage stay off the wire.
+- **Connection-owned lifetime** — one connection releases all of its sessions; per-session close is not implemented.
diff --git a/packages/acp/acp/package.json b/packages/acp/acp/package.json
new file mode 100644
index 0000000000..6ef2f4def5
--- /dev/null
+++ b/packages/acp/acp/package.json
@@ -0,0 +1,51 @@
+{
+  "name": "@deepseek-ai/dsh-acp",
+  "description": "Automation-only Agent Client Protocol server for driving DeepSeek Harness agents over JSON-RPC stdio",
+  "version": "0.0.1",
+  "private": true,
+  "type": "module",
+  "main": "lib/index.js",
+  "types": "lib/types/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./lib/types/index.d.ts",
+      "default": "./lib/index.js"
+    },
+    "./invariant": {
+      "types": "./lib/types/invariant.d.ts",
+      "default": "./lib/invariant.js"
+    },
+    "./src/*": "./src/*",
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "lib/index.js",
+    "lib/invariant.js",
+    "lib/types/**/*.d.ts",
+    "lib/types/**/*.d.ts.map",
+    "src"
+  ],
+  "license": "BSD-3-Clause",
+  "dependencies": {
+    "@agentclientprotocol/sdk": "0.25.1",
+    "schemastery": "^3.17.0"
+  },
+  "peerDependencies": {
+    "@deepseek-ai/dsh-agent": "^0.0.1",
+    "@deepseek-ai/dsh-invariants": "^0.0.1",
+    "@deepseek-ai/dsh-session": "^0.0.1",
+    "@deepseek-ai/dsh-user-approval": "^0.0.1",
+    "cordis": "^4.0.0-rc.7"
+  },
+  "devDependencies": {
+    "@deepseek-ai/dsh-agent": "workspace:^",
+    "@deepseek-ai/dsh-agent-loop": "workspace:^",
+    "@deepseek-ai/dsh-agent-loop-testkit": "workspace:^",
+    "@deepseek-ai/dsh-invariants": "workspace:^",
+    "@deepseek-ai/dsh-llm": "workspace:^",
+    "@deepseek-ai/dsh-session": "workspace:^",
+    "@deepseek-ai/dsh-tools": "workspace:^",
+    "@deepseek-ai/dsh-user-approval": "workspace:^",
+    "cordis": "^4.0.0-rc.7"
+  }
+}
diff --git a/packages/acp/acp/src/codec.ts b/packages/acp/acp/src/codec.ts
new file mode 100644
index 0000000000..53ba437425
--- /dev/null
+++ b/packages/acp/acp/src/codec.ts
@@ -0,0 +1,49 @@
+/**
+ * Pure translation between the harness lifecycle and the automation-only ACP wire.
+ * @module @deepseek-ai/dsh-acp/codec
+ */
+
+import type { ContentBlock as AcpContentBlock, StopReason } from '@agentclientprotocol/sdk'
+import type { TurnEndReason } from '@deepseek-ai/dsh-session'
+
+/**
+ * Map a harness turn ending to ACP's terminal reason vocabulary.
+ * @param reason - harness turn outcome.
+ * @returns the closest legal ACP stop reason.
+ */
+export function turnEndToStopReason(reason: TurnEndReason): StopReason {
+  switch (reason.kind) {
+    case 'completed':
+      return 'end_turn'
+    case 'max-tokens':
+      return 'max_tokens'
+    case 'aborted':
+    case 'disposed':
+    case 'rejected':
+    case 'interrupted':
+      return 'cancelled'
+    case 'error':
+      return 'end_turn'
+    // TurnEndReason is merge-extensible; future variants still need a legal wire value.
+    default:
+      return 'end_turn'
+  }
+}
+
+/**
+ * Concatenate an ACP prompt's text blocks.
+ * @param prompt - supported ACP prompt blocks.
+ * @returns text in wire order.
+ */
+export function acpPromptToText(prompt: readonly AcpContentBlock[]): string {
+  return prompt.flatMap(block => block.type === 'text' ? [block.text] : []).join('')
+}
+
+/**
+ * Whether a prompt asks the automation bridge to carry non-text content.
+ * @param prompt - ACP prompt blocks to inspect.
+ * @returns `true` when any block is not text.
+ */
+export function promptHasUnsupportedContent(prompt: readonly AcpContentBlock[]): boolean {
+  return prompt.some(block => block.type !== 'text')
+}
diff --git a/packages/acp/acp/src/index.ts b/packages/acp/acp/src/index.ts
new file mode 100644
index 0000000000..51531cbdd4
--- /dev/null
+++ b/packages/acp/acp/src/index.ts
@@ -0,0 +1,317 @@
+/**
+ * Automation-only Agent Client Protocol server over JSON-RPC stdio.
+ *
+ * The bridge exposes fresh harness sessions to trusted programmatic clients. It
+ * carries prompt text, committed assistant text, cancellation, and one-shot
+ * permission decisions; presentation and human-interaction features stay with
+ * the harness's UI modules.
+ *
+ * @module @deepseek-ai/dsh-acp
+ */
+
+import type { Context } from 'cordis'
+import { randomUUID } from 'node:crypto'
+import { isAbsolute } from 'node:path'
+import { Readable, Writable } from 'node:stream'
+import Schema from 'schemastery'
+import {
+  AgentSideConnection,
+  ndJsonStream,
+  PROTOCOL_VERSION,
+  RequestError,
+  type Agent as AcpAgent,
+  type AuthenticateRequest,
+  type CancelNotification,
+  type InitializeRequest,
+  type InitializeResponse,
+  type NewSessionRequest,
+  type NewSessionResponse,
+  type PromptRequest,
+  type PromptResponse,
+  type SessionNotification,
+  type StopReason,
+  type Stream,
+} from '@agentclientprotocol/sdk'
+import type { Agent } from '@deepseek-ai/dsh-agent'
+import { SessionId, type SessionEvent, type TurnEndReason } from '@deepseek-ai/dsh-session'
+// Side-effect type import: declaration-merges the approval waterfall answered below.
+import type {} from '@deepseek-ai/dsh-user-approval'
+import { acpPromptToText, promptHasUnsupportedContent, turnEndToStopReason } from './codec.ts'
+
+export const name = 'acp'
+/** The bridge creates and owns agents; every other concern is carried by the agent composition. */
+export const inject = ['agents']
+
+/** Preserve invalid-parameter detail in the SDK wire error message. */
+function invalidParams(detail: string): RequestError {
+  return RequestError.invalidParams(undefined, detail)
+}
+
+/** Preserve failed-turn detail; plain handler errors become a generic wire internal error. */
+function internalError(detail: string): RequestError {
+  return RequestError.internalError(undefined, detail)
+}
+
+/** Plugin config: the provider/model target used for each ACP-created agent. */
+export interface AcpConfig {
+  /** Provider route for created agents. */
+  provider?: string
+  /** Model name for created agents. */
+  model?: string
+  /** Runtime-only transport override; production uses stdio. */
+  stream?: Stream
+}
+
+export const Config: Schema<AcpConfig> = Schema.object({
+  provider: Schema.string(),
+  model: Schema.string(),
+})
+
+/** Per-session protocol state. */
+interface SessionRecord {
+  agent: Agent
+  /** Exact owned-agent disposer; resolves after registry, loop, and session teardown. */
+  dispose: () => Promise<void>
+  /** In-flight prompt and its captured turn number for exact settlement. */
+  inflight: {
+    resolve: (reason: StopReason) => void
+    reject: (error: Error) => void
+    turn: number | undefined
+  } | undefined
+}
+
+/**
+ * Mount the automation-only ACP server.
+ * @param ctx - Cordis context carrying the agent factory and session events.
+ * @param config - Initial provider/model target and optional test transport.
+ */
+export function apply(ctx: Context, config: AcpConfig): void {
+  // ACP handlers execute outside this plugin's injection scope, so capture the
+  // injected service during apply rather than reading it lazily in a callback.
+  const agents = ctx.agents
+  const logger = ctx.logger
+  const sessions = new Map<SessionId, SessionRecord>()
+  let closed = false
+  let conn: AgentSideConnection
+
+  /** Return the bridge-owned record for an agent, rejecting same-id impostors. */
+  const ownedRecord = (agent: Agent): SessionRecord | undefined => {
+    const record = sessions.get(agent.session.id)
+    return record?.agent === agent ? record : undefined
+  }
+
+  const assertOpen = (): void => {
+    if (closed) throw internalError('the ACP bridge has been disposed')
+  }
+
+  const requireSession = (sessionId: SessionId): SessionRecord => {
+    const record = sessions.get(sessionId)
+    if (record === undefined) throw invalidParams(`unknown session: ${sessionId}`)
+    return record
+  }
+
+  /** Send a protocol update without letting a disconnected client fail an agent turn. */
+  const notify = (notification: SessionNotification): void => {
+    /* v8 ignore next 3 -- only a transport write failure reaches this guard. */
+    void conn.sessionUpdate(notification).catch((error: unknown) => {
+      logger.warn(`acp: session/update failed: ${String(error)}`)
+    })
+  }
+
+  const settlePrompt = (record: SessionRecord, reason: StopReason): void => {
+    const inflight = record.inflight
+    if (inflight === undefined) return
+    record.inflight = undefined
+    inflight.resolve(reason)
+  }
+
+  const settleFromTurnEnd = (
+    inflight: NonNullable<SessionRecord['inflight']>,
+    reason: TurnEndReason,
+  ): void => {
+    if (reason.kind === 'error') {
+      inflight.reject(internalError(`turn failed: ${'failure' in reason ? reason.failure.message : reason.message}`))
+      return
+    }
+    inflight.resolve(turnEndToStopReason(reason))
+  }
+
+  // Emit only committed assistant text. Raw chunks, reasoning, tools, plans,
+  // titles, and retry markers are presentation or trace data and stay off the
+  // automation wire.
+  ctx.on('session/event', (session, event: SessionEvent) => {
+    const record = sessions.get(session.header.id)
+    if (record === undefined || record.agent.session !== session) return
+    try {
+      if (event.type === 'assistant/message') {
+        for (const block of event.data.content) {
+          if (block.type === 'text' && block.text.length > 0) {
+            notify({
+              sessionId: record.agent.session.id,
+              update: {
+                sessionUpdate: 'agent_message_chunk',
+                content: { type: 'text', text: block.text },
+              },
+            })
+          }
+        }
+      }
+    } finally {
+      const inflight = record.inflight
+      if (inflight !== undefined && event.type === 'turn/start') {
+        if (inflight.turn === undefined && event.data.trigger.kind === 'message'
+          && event.data.trigger.source.kind === 'user') {
+          inflight.turn = event.data.turn
+        }
+      } else if (inflight !== undefined && event.type === 'turn/end' && inflight.turn === event.data.turn) {
+        record.inflight = undefined
+        settleFromTurnEnd(inflight, event.data.reason)
+      }
+    }
+  })
+
+  // Permission requests are a machine policy channel for ACP clients such as
+  // dsh-subagent-acp. The bridge offers one-shot choices only and never infers a
+  // durable grant from an unknown client response.
+  ctx.on('approval/request', (request, next) => {
+    const record = ownedRecord(request.agent)
+    if (record === undefined || request.callId === undefined) return next()
+    return conn.requestPermission({
+      sessionId: record.agent.session.id,
+      toolCall: { toolCallId: request.callId },
+      options: [
+        { optionId: 'allow-once', name: 'Allow once', kind: 'allow_once' },
+        { optionId: 'reject-once', name: 'Reject', kind: 'reject_once' },
+      ],
+    }).then(({ outcome }) => {
+      if (outcome.outcome === 'cancelled') return 'cancelled'
+      return outcome.optionId === 'allow-once' ? 'allowed-once' : 'rejected'
+    })
+  })
+
+  const makeAgent = (connection: AgentSideConnection): AcpAgent => {
+    conn = connection
+    return {
+      initialize(params: InitializeRequest): Promise<InitializeResponse> {
+        const protocolVersion = params.protocolVersion === PROTOCOL_VERSION
+          ? params.protocolVersion
+          : PROTOCOL_VERSION
+        return Promise.resolve({
+          protocolVersion,
+          agentInfo: { name: 'deepseek-harness-acp', version: '0.0.1' },
+          agentCapabilities: {
+            promptCapabilities: { image: false, audio: false, embeddedContext: false },
+          },
+          authMethods: [],
+        })
+      },
+
+      authenticate(_params: AuthenticateRequest): Promise<void> {
+        return Promise.resolve()
+      },
+
+      async newSession(params: NewSessionRequest): Promise<NewSessionResponse> {
+        assertOpen()
+        validateSessionParams(params)
+        const sessionId = SessionId(randomUUID())
+        const handle = await agents.create({
+          sessionId,
+          meta: { cwd: params.cwd },
+          agentOptions: agentOptions(config),
+        })
+        /* v8 ignore next 4 -- a real stdio close can race an in-flight create. */
+        if (closed) {
+          await handle.dispose()
+          throw internalError('connection closed during session/new')
+        }
+        sessions.set(sessionId, {
+          agent: handle.agent,
+          dispose: () => handle.dispose(),
+          inflight: undefined,
+        })
+        return { sessionId }
+      },
+
+      async prompt(params: PromptRequest): Promise<PromptResponse> {
+        assertOpen()
+        const record = requireSession(SessionId(params.sessionId))
+        if (record.inflight !== undefined) {
+          throw invalidParams('a prompt is already in flight for this session')
+        }
+        if (promptHasUnsupportedContent(params.prompt)) {
+          throw invalidParams('only text prompt content is supported')
+        }
+        const text = acpPromptToText(params.prompt)
+        if (text.trim().length === 0) throw invalidParams('empty prompt')
+
+        const stopReason = await new Promise<StopReason>((resolve, reject) => {
+          record.inflight = { resolve, reject, turn: undefined }
+          record.agent.send([{ type: 'text', text }])
+        })
+        return { stopReason }
+      },
+
+      cancel(params: CancelNotification): Promise<void> {
+        const record = sessions.get(SessionId(params.sessionId))
+        if (record === undefined) return Promise.resolve()
+        record.agent.cancel({ kind: 'user' })
+        settlePrompt(record, 'cancelled')
+        return Promise.resolve()
+      },
+    }
+  }
+
+  /* v8 ignore next 4 -- production stdio wiring; tests inject config.stream. */
+  const stream: Stream = config.stream ?? ndJsonStream(
+    Writable.toWeb(process.stdout) as WritableStream<Uint8Array>,
+    Readable.toWeb(process.stdin) as ReadableStream<Uint8Array>,
+  )
+  conn = new AgentSideConnection(makeAgent, stream)
+
+  let quiescing: Promise<void> | undefined
+  const quiesce = (): Promise<void> => {
+    if (quiescing !== undefined) return quiescing
+    closed = true
+    const records = [...sessions.values()]
+    sessions.clear()
+    quiescing = Promise.all(records.map(async (record) => {
+      settlePrompt(record, 'cancelled')
+      await record.dispose()
+    })).then(() => {})
+    return quiescing
+  }
+
+  /* v8 ignore start -- production transport rejection and teardown failure. */
+  void conn.closed
+    .catch((error: unknown) => {
+      logger.warn(`acp: connection closed with an error: ${String(error)}`)
+    })
+    .then(quiesce)
+    .catch((error: unknown) => {
+      logger.warn(`acp: connection-close teardown failed: ${String(error)}`)
+    })
+  /* v8 ignore stop */
+
+  ctx.effect(() => quiesce, 'acp.connection')
+}
+
+/**
+ * Build per-agent options from plugin config without assigning absent optional fields.
+ * @param config - ACP provider/model configuration.
+ * @returns the configured fields only.
+ */
+export function agentOptions(config: AcpConfig): { provider?: string; model?: string } {
+  return {
+    ...config.provider !== undefined ? { provider: config.provider } : {},
+    ...config.model !== undefined ? { model: config.model } : {},
+  }
+}
+
+/** Reject session features outside the automation contract. */
+function validateSessionParams(params: NewSessionRequest): void {
+  if (!isAbsolute(params.cwd)) throw invalidParams(`cwd must be an absolute path: ${params.cwd}`)
+  if (params.additionalDirectories !== undefined && params.additionalDirectories.length > 0) {
+    throw invalidParams('additionalDirectories is not supported')
+  }
+  if (params.mcpServers.length > 0) throw invalidParams('mcpServers is not supported')
+}
diff --git a/packages/ui/acp/src/invariant.ts b/packages/acp/acp/src/invariant.ts
similarity index 85%
rename from packages/ui/acp/src/invariant.ts
rename to packages/acp/acp/src/invariant.ts
index fdefcf291e..9d5b769872 100644
--- a/packages/ui/acp/src/invariant.ts
+++ b/packages/acp/acp/src/invariant.ts
@@ -15,8 +15,8 @@ export const name = 'acp-invariant'
 export const inject = ['invariants']
 
 /**
- * No runtime invariant: this presentation adapter owns no durable package-local event stream;
- * boundary and replay tests cover its protocol mapping.
+ * No runtime invariant: this transport owns no durable package-local event stream;
+ * protocol and lifecycle tests cover its mapping.
  */
 const install: InvariantInstaller = () => {}
 
diff --git a/packages/acp/acp/tests/approval.spec.ts b/packages/acp/acp/tests/approval.spec.ts
new file mode 100644
index 0000000000..648f597010
--- /dev/null
+++ b/packages/acp/acp/tests/approval.spec.ts
@@ -0,0 +1,71 @@
+import { afterEach, describe, expect, it } from 'vitest'
+import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
+import { CallId } from '@deepseek-ai/dsh-llm'
+import type { Agent } from '@deepseek-ai/dsh-agent'
+import { SessionId } from '@deepseek-ai/dsh-session'
+import ApprovalService, { type ApprovalRequest } from '@deepseek-ai/dsh-user-approval'
+import { makeBridgeHarness, type BridgeHarness } from './harness.ts'
+
+describe('ACP machine permission policy', () => {
+  let harness: BridgeHarness | undefined
+
+  afterEach(async () => {
+    await harness?.dispose()
+    harness = undefined
+  })
+
+  async function ownedRequest(overrides: Partial<ApprovalRequest> = {}): Promise<ApprovalRequest> {
+    if (harness === undefined) throw new Error('missing harness')
+    await harness.ctx.plugin(ApprovalService)
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    agent.session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
+    return { agent, toolName: 'bash', callId: CallId('call-9'), ...overrides }
+  }
+
+  it('maps the two advertised one-shot choices', async () => {
+    harness = await makeBridgeHarness()
+    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'allow-once' } })
+    const request = await ownedRequest()
+    await expect(harness.ctx.approval.request(request)).resolves.toBe('allowed-once')
+    expect(harness.permissionRequests[0]).toMatchObject({
+      sessionId: request.agent.session.id,
+      toolCall: { toolCallId: 'call-9' },
+      options: [
+        { optionId: 'allow-once', kind: 'allow_once' },
+        { optionId: 'reject-once', kind: 'reject_once' },
+      ],
+    })
+
+    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'reject-once' } })
+    await expect(harness.ctx.approval.request(request)).resolves.toBe('rejected')
+  })
+
+  it('maps cancellation and unknown choices without granting access', async () => {
+    harness = await makeBridgeHarness()
+    const request = await ownedRequest()
+    await expect(harness.ctx.approval.request(request)).resolves.toBe('cancelled')
+    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'unknown-grant' } })
+    await expect(harness.ctx.approval.request(request)).resolves.toBe('rejected')
+  })
+
+  it('delegates a same-id foreign agent', async () => {
+    harness = await makeBridgeHarness()
+    const request = await ownedRequest()
+    const foreign = {
+      session: { id: request.agent.session.id, events: [{ type: 'turn/start' }], append: () => ({}) },
+    } as unknown as Agent
+    await expect(harness.ctx.approval.request({ agent: foreign, toolName: 'bash', callId: CallId('call') }))
+      .resolves.toBe('unavailable')
+    expect(harness.permissionRequests).toHaveLength(0)
+  })
+
+  it('delegates requests that have no protocol tool-call identity', async () => {
+    harness = await makeBridgeHarness()
+    const request = await ownedRequest()
+    await expect(harness.ctx.approval.request({ agent: request.agent, toolName: request.toolName }))
+      .resolves.toBe('unavailable')
+    expect(harness.permissionRequests).toHaveLength(0)
+  })
+})
diff --git a/packages/acp/acp/tests/bridge.spec.ts b/packages/acp/acp/tests/bridge.spec.ts
new file mode 100644
index 0000000000..c7d5a176d6
--- /dev/null
+++ b/packages/acp/acp/tests/bridge.spec.ts
@@ -0,0 +1,123 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
+import { SessionId } from '@deepseek-ai/dsh-session'
+import { makeBridgeHarness, textResponse, type BridgeHarness } from './harness.ts'
+
+describe('automation-only ACP bridge', () => {
+  let harness: BridgeHarness | undefined
+
+  afterEach(async () => {
+    await harness?.dispose()
+    harness = undefined
+  })
+
+  it('advertises only fresh text sessions', async () => {
+    harness = await makeBridgeHarness()
+    const response = await harness.client.initialize({
+      protocolVersion: PROTOCOL_VERSION,
+      clientCapabilities: { _meta: { terminal_output: true } },
+    })
+
+    expect(response).toEqual({
+      protocolVersion: PROTOCOL_VERSION,
+      agentInfo: { name: 'deepseek-harness-acp', version: '0.0.1' },
+      agentCapabilities: {
+        promptCapabilities: { image: false, audio: false, embeddedContext: false },
+      },
+      authMethods: [],
+    })
+  })
+
+  it('negotiates an unsupported version and accepts the required no-op authentication call', async () => {
+    harness = await makeBridgeHarness()
+    const response = await harness.client.initialize({ protocolVersion: 0, clientCapabilities: {} })
+    expect(response.protocolVersion).toBe(PROTOCOL_VERSION)
+    await expect(harness.client.authenticate({ methodId: 'unused' })).resolves.toEqual({})
+  })
+
+  it('creates a session, emits one committed answer, and settles the prompt', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('hello there')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const result = await harness.client.prompt({
+      sessionId,
+      prompt: [{ type: 'text', text: 'say hello' }],
+    })
+
+    expect(result.stopReason).toBe('end_turn')
+    await vi.waitFor(() => { expect(harness!.updates).toHaveLength(1) })
+    expect(harness.updates).toEqual([{
+      sessionUpdate: 'agent_message_chunk',
+      content: { type: 'text', text: 'hello there' },
+    }])
+    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.header.cwd).toBe(process.cwd())
+    expect(harness.adapter.requests[0]?.messages.at(-1)?.content).toEqual([{ type: 'text', text: 'say hello' }])
+  })
+
+  it('concatenates text blocks without exposing protocol framing to the model', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('done')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    await harness.client.prompt({
+      sessionId,
+      prompt: [
+        { type: 'text', text: 'first' },
+        { type: 'text', text: ' second' },
+      ],
+    })
+
+    expect(harness.adapter.requests[0]?.messages.at(-1)?.content).toEqual([{ type: 'text', text: 'first second' }])
+  })
+
+  it('renders the deployment persona for an ACP-created agent', async () => {
+    harness = await makeBridgeHarness({ persona: 'Automation persona for {{model}} in {{cwd}}.', script: [textResponse('ok')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+    expect(harness.adapter.requests[0]?.system).toContain(`Automation persona for mock in ${process.cwd()}.`)
+  })
+
+  it('requires one absolute workspace and no MCP servers', async () => {
+    harness = await makeBridgeHarness()
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+
+    await expect(harness.client.newSession({ cwd: 'relative', mcpServers: [] })).rejects.toThrow(/absolute path/)
+    await expect(harness.client.newSession({
+      cwd: process.cwd(),
+      mcpServers: [],
+      additionalDirectories: ['/tmp/other'],
+    })).rejects.toThrow(/additionalDirectories/)
+    await expect(harness.client.newSession({
+      cwd: process.cwd(),
+      mcpServers: [{ name: 'fs', command: 'node', args: [], env: [] }],
+    })).rejects.toThrow(/mcpServers/)
+
+    await expect(harness.client.newSession({
+      cwd: process.cwd(),
+      mcpServers: [],
+      additionalDirectories: [],
+    })).resolves.toHaveProperty('sessionId')
+  })
+
+  it('rejects empty and non-text prompts before a turn starts', async () => {
+    harness = await makeBridgeHarness()
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '  ' }] }))
+      .rejects.toThrow(/empty prompt/)
+    await expect(harness.client.prompt({
+      sessionId,
+      prompt: [{ type: 'resource_link', name: 'file', uri: 'file:///tmp/a' }],
+    })).rejects.toThrow(/only text/)
+    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events.some(event => event.type === 'turn/start')).toBe(false)
+  })
+
+  it('rejects prompts for unknown sessions and ignores unknown cancellation', async () => {
+    harness = await makeBridgeHarness()
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    await expect(harness.client.prompt({ sessionId: 'missing', prompt: [{ type: 'text', text: 'go' }] }))
+      .rejects.toThrow(/unknown session/)
+    await expect(harness.client.cancel({ sessionId: 'missing' })).resolves.toBeUndefined()
+  })
+})
diff --git a/packages/acp/acp/tests/codec.spec.ts b/packages/acp/acp/tests/codec.spec.ts
new file mode 100644
index 0000000000..2aee641c06
--- /dev/null
+++ b/packages/acp/acp/tests/codec.spec.ts
@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest'
+import type { TurnEndReason } from '@deepseek-ai/dsh-session'
+import { acpPromptToText, promptHasUnsupportedContent, turnEndToStopReason } from '../src/codec.ts'
+import { agentOptions } from '../src/index.ts'
+
+describe('ACP automation codec', () => {
+  it('maps every known turn outcome to a legal stop reason', () => {
+    const cases: [TurnEndReason, string][] = [
+      [{ kind: 'completed' }, 'end_turn'],
+      [{ kind: 'max-tokens' }, 'max_tokens'],
+      [{ kind: 'aborted' }, 'cancelled'],
+      [{ kind: 'disposed' }, 'cancelled'],
+      [{ kind: 'rejected', reason: 'blocked' }, 'cancelled'],
+      [{ kind: 'interrupted' }, 'cancelled'],
+      [{ kind: 'error', step: 1, message: 'boom' }, 'end_turn'],
+    ]
+    for (const [reason, expected] of cases) expect(turnEndToStopReason(reason)).toBe(expected)
+  })
+
+  it('uses a legal fallback for merge-extensible future outcomes', () => {
+    expect(turnEndToStopReason({ kind: 'future' } as unknown as TurnEndReason)).toBe('end_turn')
+  })
+
+  it('concatenates text and rejects every non-text block', () => {
+    expect(acpPromptToText([{ type: 'text', text: 'a' }, { type: 'text', text: 'b' }])).toBe('ab')
+    expect(acpPromptToText([{ type: 'resource_link', name: 'x', uri: 'file:///x' }])).toBe('')
+    expect(promptHasUnsupportedContent([{ type: 'text', text: 'ok' }])).toBe(false)
+    expect(promptHasUnsupportedContent([{ type: 'resource_link', name: 'x', uri: 'file:///x' }])).toBe(true)
+  })
+
+  it('copies only configured agent target fields', () => {
+    expect(agentOptions({})).toEqual({})
+    expect(agentOptions({ provider: 'deepseek' })).toEqual({ provider: 'deepseek' })
+    expect(agentOptions({ model: 'model' })).toEqual({ model: 'model' })
+    expect(agentOptions({ provider: 'deepseek', model: 'model' })).toEqual({ provider: 'deepseek', model: 'model' })
+  })
+})
diff --git a/packages/acp/acp/tests/dispose.spec.ts b/packages/acp/acp/tests/dispose.spec.ts
new file mode 100644
index 0000000000..1303cde0b2
--- /dev/null
+++ b/packages/acp/acp/tests/dispose.spec.ts
@@ -0,0 +1,85 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
+import { SessionId } from '@deepseek-ai/dsh-session'
+import { makeBridgeHarness, type BridgeHarness } from './harness.ts'
+
+describe('ACP connection ownership', () => {
+  let harness: BridgeHarness | undefined
+
+  afterEach(async () => {
+    await harness?.dispose()
+    harness = undefined
+  })
+
+  it('disposal cancels a running prompt and awaits agent teardown', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    const prompt = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+    await vi.waitFor(() => { expect(agent.status).toBe('running') })
+
+    await harness.acpFiber.dispose()
+    await expect(prompt).resolves.toEqual({ stopReason: 'cancelled' })
+    expect(agent.status).toBe('disposed')
+    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
+  })
+
+  it('an ACP-only reload rejects new sessions before creating an orphan', async () => {
+    harness = await makeBridgeHarness()
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    await harness.acpFiber.dispose()
+    await expect(harness.client.newSession({ cwd: process.cwd(), mcpServers: [] }))
+      .rejects.toThrow(/disposed/)
+    expect(harness.ctx.agents.list()).toHaveLength(0)
+  })
+
+  it('a client disconnect disposes every owned session without root-context disposal', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    void harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }).catch(() => {})
+    await vi.waitFor(() => { expect(agent.status).toBe('running') })
+
+    await harness.closeClientTransport()
+    await harness.acpFiber.dispose()
+    expect(agent.status).toBe('disposed')
+    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
+    expect(harness.ctx.sessions.get(SessionId(sessionId))).toBeUndefined()
+  })
+
+  it('a failed client transport still disposes every owned session', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    void harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }).catch(() => {})
+    await vi.waitFor(() => { expect(agent.status).toBe('running') })
+
+    await harness.abortClientTransport()
+    await vi.waitFor(() => { expect(agent.status).toBe('disposed') })
+    await vi.waitFor(() => {
+      expect(harness!.ctx.agents.get(SessionId(sessionId)) === undefined).toBe(true)
+    })
+  })
+
+  it('disconnect and plugin disposal share one quiescence boundary', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    void harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }).catch(() => {})
+    await vi.waitFor(() => { expect(agent.status).toBe('running') })
+
+    await Promise.all([harness.closeClientTransport(), harness.acpFiber.dispose()])
+    expect(agent.status).toBe('disposed')
+    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
+  })
+
+  it('disposing a session-less bridge is idempotent', async () => {
+    harness = await makeBridgeHarness()
+    await Promise.all([harness.acpFiber.dispose(), harness.acpFiber.dispose()])
+    expect(harness.ctx.agents.list()).toHaveLength(0)
+  })
+})
diff --git a/packages/acp/acp/tests/edges.spec.ts b/packages/acp/acp/tests/edges.spec.ts
new file mode 100644
index 0000000000..ab70859939
--- /dev/null
+++ b/packages/acp/acp/tests/edges.spec.ts
@@ -0,0 +1,65 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
+import { CallId, type StreamChunk } from '@deepseek-ai/dsh-llm'
+import { SessionId } from '@deepseek-ai/dsh-session'
+import { defineContentToolFixture } from '@deepseek-ai/dsh-tools'
+import { makeBridgeHarness, textResponse, type BridgeHarness } from './harness.ts'
+
+function toolCallResponse(): StreamChunk[] {
+  return [
+    { type: 'block-start', index: 0, blockType: 'tool-call' },
+    { type: 'tool-call-delta', index: 0, id: CallId('call-1'), name: 'echo', argumentsDelta: '{}' },
+    { type: 'block-end', index: 0, block: { type: 'tool-call', id: CallId('call-1'), name: 'echo', arguments: '{}' } },
+    { type: 'finish', reason: { kind: 'tool-calls' } },
+  ]
+}
+
+describe('ACP automation output boundary', () => {
+  let harness: BridgeHarness | undefined
+
+  afterEach(async () => {
+    await harness?.dispose()
+    harness = undefined
+  })
+
+  it('does not emit tool, terminal, plan, title, or reasoning presentation updates', async () => {
+    harness = await makeBridgeHarness({ script: [toolCallResponse(), textResponse('done')] })
+    harness.ctx.tools.register(defineContentToolFixture({
+      name: 'echo',
+      description: 'Return a deterministic result.',
+      parameters: {},
+      execute: () => Promise.resolve([{ type: 'text', text: 'tool result' }]),
+    }))
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+
+    await vi.waitFor(() => { expect(harness!.updates).toHaveLength(1) })
+    expect(harness.updates).toEqual([{
+      sessionUpdate: 'agent_message_chunk',
+      content: { type: 'text', text: 'done' },
+    }])
+  })
+
+  it('ignores events from agents the bridge does not own', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('foreign')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    const { agent } = await harness.ctx.agents.create({
+      sessionId: SessionId('foreign'),
+      agentOptions: { provider: 'mock', model: 'mock' },
+    })
+    agent.send([{ type: 'text', text: 'go' }])
+    await agent.whenIdle()
+    expect(harness.updates).toHaveLength(0)
+  })
+
+  it('contains client update failures without changing prompt settlement', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('answer')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
+    harness.onSessionUpdateError = () => {}
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
+      .resolves.toEqual({ stopReason: 'end_turn' })
+  })
+})
diff --git a/packages/acp/acp/tests/harness.ts b/packages/acp/acp/tests/harness.ts
new file mode 100644
index 0000000000..35d3c79947
--- /dev/null
+++ b/packages/acp/acp/tests/harness.ts
@@ -0,0 +1,171 @@
+/** In-memory ACP transport fixture over the real agent factory and loop. */
+
+import { Context } from 'cordis'
+import {
+  ClientSideConnection,
+  ndJsonStream,
+  type Agent as AcpAgent,
+  type Client,
+  type RequestPermissionRequest,
+  type RequestPermissionResponse,
+  type SessionNotification,
+  type Stream,
+} from '@agentclientprotocol/sdk'
+import { type GenerateOptions, LlmAdapter, type StreamChunk } from '@deepseek-ai/dsh-llm'
+import AgentLoop from '@deepseek-ai/dsh-agent-loop'
+import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
+import * as AcpPlugin from '../src/index.ts'
+import type { AcpConfig } from '../src/index.ts'
+
+/** Scripted adapter for protocol tests. */
+class MockAdapter extends LlmAdapter {
+  readonly requests: GenerateOptions[] = []
+
+  constructor(private readonly script: (StreamChunk[] | 'hang')[]) {
+    super()
+  }
+
+  override providerInfo(provider: string) {
+    if (provider !== 'mock') throw new Error(`MockAdapter: unknown provider ${provider}`)
+    return { id: 'mock', name: 'Mock' }
+  }
+
+  override listModels(provider: string) {
+    return Promise.resolve(provider === 'mock' ? [{ provider: 'mock', id: 'mock', name: 'Mock' }] : [])
+  }
+
+  async * stream(options: GenerateOptions): AsyncIterable<StreamChunk> {
+    this.requests.push(options)
+    const entry = this.script.shift()
+    if (entry === undefined) throw new Error('MockAdapter: script exhausted')
+    if (entry === 'hang') {
+      yield { type: 'block-start', index: 0, blockType: 'text' }
+      yield { type: 'text-delta', index: 0, text: 'partial' }
+      await new Promise<void>((_resolve, reject) => {
+        if (options.signal?.aborted) {
+          reject(new Error('aborted'))
+          return
+        }
+        options.signal?.addEventListener('abort', () => { reject(new Error('aborted')) }, { once: true })
+      })
+      return
+    }
+    for (const chunk of entry) {
+      if (options.signal?.aborted) throw new Error('aborted')
+      yield chunk
+    }
+  }
+}
+
+/** Scripted text response ending in a clean stop. */
+export function textResponse(text: string): StreamChunk[] {
+  return [
+    { type: 'block-start', index: 0, blockType: 'text' },
+    ...Array.from(text, (char): StreamChunk => ({ type: 'text-delta', index: 0, text: char })),
+    { type: 'block-end', index: 0, block: { type: 'text', text } },
+    { type: 'usage', usage: { inputTokens: 5, outputTokens: text.length } },
+    { type: 'finish', reason: { kind: 'stop' } },
+  ]
+}
+
+/** Scripted response ending at the output-token ceiling. */
+export function maxTokensResponse(text: string): StreamChunk[] {
+  return [
+    { type: 'block-start', index: 0, blockType: 'text' },
+    ...Array.from(text, (char): StreamChunk => ({ type: 'text-delta', index: 0, text: char })),
+    { type: 'block-end', index: 0, block: { type: 'text', text } },
+    { type: 'finish', reason: { kind: 'max-tokens' } },
+  ]
+}
+
+/** Scripted response that fails after publishing an uncommitted partial chunk. */
+export function errorResponse(message: string): StreamChunk[] {
+  return [
+    { type: 'block-start', index: 0, blockType: 'text' },
+    { type: 'text-delta', index: 0, text: 'partial' },
+    { type: 'finish', reason: { kind: 'error', failure: { message, code: 'PROVIDER_ERROR' } } },
+  ]
+}
+
+export type CapturedUpdate = SessionNotification['update']
+
+export interface BridgeHarness {
+  ctx: Context
+  client: ClientSideConnection
+  adapter: MockAdapter
+  updates: CapturedUpdate[]
+  sessionUpdates: { sessionId: string; update: CapturedUpdate }[]
+  permissionRequests: RequestPermissionRequest[]
+  onPermission: (request: RequestPermissionRequest) => RequestPermissionResponse
+  onSessionUpdateError: (() => void) | undefined
+  closeClientTransport: () => Promise<void>
+  abortClientTransport: () => Promise<void>
+  acpFiber: Awaited<ReturnType<Context['plugin']>>
+  dispose: () => Promise<void>
+}
+
+type AcpConfigOverrides = { [K in keyof AcpConfig]?: AcpConfig[K] | undefined }
+
+/** Build the bridge and a connected SDK client over cross-wired byte streams. */
+export async function makeBridgeHarness(options: {
+  script?: (StreamChunk[] | 'hang')[]
+  config?: AcpConfigOverrides
+  persona?: string
+} = {}): Promise<BridgeHarness> {
+  const adapter = new MockAdapter(options.script ?? [])
+  const ctx = new Context()
+  await mountAgentLoopTestDependencies(ctx, { systemPrompt: { persona: options.persona ?? '' } })
+  await ctx.plugin(AgentLoop, { agents: [] })
+  ctx.llm.registerAdapter(['mock'], adapter)
+
+  const agentToClient = new TransformStream<Uint8Array, Uint8Array>()
+  const clientToAgent = new TransformStream<Uint8Array, Uint8Array>()
+  const clientToAgentWriter = clientToAgent.writable.getWriter()
+  const clientOutput = new WritableStream<Uint8Array>({
+    write: chunk => clientToAgentWriter.write(chunk),
+  })
+  const agentStream: Stream = ndJsonStream(agentToClient.writable, clientToAgent.readable)
+  const clientStream: Stream = ndJsonStream(clientOutput, agentToClient.readable)
+
+  const updates: CapturedUpdate[] = []
+  const sessionUpdates: { sessionId: string; update: CapturedUpdate }[] = []
+  const permissionRequests: RequestPermissionRequest[] = []
+  const harness: BridgeHarness = {
+    ctx,
+    adapter,
+    updates,
+    sessionUpdates,
+    permissionRequests,
+    onPermission: () => ({ outcome: { outcome: 'cancelled' } }),
+    onSessionUpdateError: undefined,
+    client: undefined as unknown as ClientSideConnection,
+    acpFiber: undefined as unknown as BridgeHarness['acpFiber'],
+    closeClientTransport: async () => { await clientToAgentWriter.close() },
+    abortClientTransport: async () => { await clientToAgentWriter.abort(new Error('client transport failed')) },
+    dispose: async () => { await ctx.fiber.dispose() },
+  }
+
+  const makeClient = (_agent: AcpAgent): Client => ({
+    sessionUpdate(params: SessionNotification): Promise<void> {
+      updates.push(params.update)
+      sessionUpdates.push({ sessionId: params.sessionId, update: params.update })
+      if (harness.onSessionUpdateError !== undefined) return Promise.reject(new Error('client update rejected'))
+      return Promise.resolve()
+    },
+    requestPermission(params: RequestPermissionRequest): Promise<RequestPermissionResponse> {
+      permissionRequests.push(params)
+      return Promise.resolve(harness.onPermission(params))
+    },
+  })
+
+  const config = { stream: agentStream, ...options.config } as AcpConfig
+  if (!(options.config && 'provider' in options.config)) config.provider = 'mock'
+  if (!(options.config && 'model' in options.config)) config.model = 'mock'
+  harness.acpFiber = await ctx.plugin({
+    name: 'acp-test',
+    inject: [...AcpPlugin.inject],
+    apply: (inner: Context) => { AcpPlugin.apply(inner, config) },
+  })
+  harness.client = new ClientSideConnection(makeClient, clientStream)
+  return harness
+}
diff --git a/packages/acp/acp/tests/multi-session.spec.ts b/packages/acp/acp/tests/multi-session.spec.ts
new file mode 100644
index 0000000000..7619ec3b69
--- /dev/null
+++ b/packages/acp/acp/tests/multi-session.spec.ts
@@ -0,0 +1,95 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
+import { SessionId } from '@deepseek-ai/dsh-session'
+import { makeBridgeHarness, textResponse, type BridgeHarness, type CapturedUpdate } from './harness.ts'
+
+function messageTextFor(
+  updates: { sessionId: string; update: CapturedUpdate }[],
+  sessionId: string,
+): string {
+  return updates.flatMap(({ sessionId: owner, update }) => (
+    owner === sessionId && update.sessionUpdate === 'agent_message_chunk' && update.content.type === 'text'
+      ? [update.content.text]
+      : []
+  )).join('')
+}
+
+describe('ACP multi-session isolation', () => {
+  let harness: BridgeHarness | undefined
+
+  afterEach(async () => {
+    await harness?.dispose()
+    harness = undefined
+  })
+
+  it('demultiplexes concurrent answers by session id', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('answer-A'), textResponse('answer-B')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+
+    const [resultA, resultB] = await Promise.all([
+      harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'go A' }] }),
+      harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'go B' }] }),
+    ])
+    expect(resultA.stopReason).toBe('end_turn')
+    expect(resultB.stopReason).toBe('end_turn')
+    await vi.waitFor(() => {
+      expect(messageTextFor(harness!.sessionUpdates, a)).toBe('answer-A')
+      expect(messageTextFor(harness!.sessionUpdates, b)).toBe('answer-B')
+    })
+  })
+
+  it('cancels one session without affecting another', async () => {
+    harness = await makeBridgeHarness({ script: ['hang', textResponse('B done')] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+
+    const pendingA = harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'hang A' }] })
+    await vi.waitFor(() => { expect(harness!.ctx.agents.get(SessionId(a))?.status).toBe('running') })
+    await harness.client.cancel({ sessionId: a })
+    await expect(pendingA).resolves.toEqual({ stopReason: 'cancelled' })
+    await expect(harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'go B' }] }))
+      .resolves.toEqual({ stopReason: 'end_turn' })
+    await vi.waitFor(() => { expect(messageTextFor(harness!.sessionUpdates, b)).toBe('B done') })
+  })
+
+  it('enforces one in-flight prompt independently for each session', async () => {
+    harness = await makeBridgeHarness({ script: ['hang', 'hang'] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+    const pendingA = harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'A' }] })
+    const pendingB = harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'B' }] })
+    await vi.waitFor(() => {
+      expect(harness!.ctx.agents.get(SessionId(a))?.status).toBe('running')
+      expect(harness!.ctx.agents.get(SessionId(b))?.status).toBe('running')
+    })
+
+    await expect(harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'again' }] }))
+      .rejects.toThrow(/already in flight/)
+    await Promise.all([harness.client.cancel({ sessionId: a }), harness.client.cancel({ sessionId: b })])
+    await expect(pendingA).resolves.toEqual({ stopReason: 'cancelled' })
+    await expect(pendingB).resolves.toEqual({ stopReason: 'cancelled' })
+  })
+
+  it('drains every live session on bridge disposal', async () => {
+    harness = await makeBridgeHarness({ script: ['hang', 'hang'] })
+    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+    const agentA = harness.ctx.agents.get(SessionId(a))!
+    const agentB = harness.ctx.agents.get(SessionId(b))!
+    void harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'A' }] }).catch(() => {})
+    void harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'B' }] }).catch(() => {})
+    await vi.waitFor(() => {
+      expect(agentA.status).toBe('running')
+      expect(agentB.status).toBe('running')
+    })
+
+    await harness.acpFiber.dispose()
+    expect(harness.ctx.agents.get(SessionId(a))).toBeUndefined()
+    expect(harness.ctx.agents.get(SessionId(b))).toBeUndefined()
+  })
+})
diff --git a/packages/acp/acp/tests/turns.spec.ts b/packages/acp/acp/tests/turns.spec.ts
new file mode 100644
index 0000000000..e4123efe60
--- /dev/null
+++ b/packages/acp/acp/tests/turns.spec.ts
@@ -0,0 +1,156 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
+import { SessionId } from '@deepseek-ai/dsh-session'
+import {
+  errorResponse,
+  makeBridgeHarness,
+  maxTokensResponse,
+  textResponse,
+  type BridgeHarness,
+} from './harness.ts'
+
+async function newSession(harness: BridgeHarness): Promise<string> {
+  await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
+  return (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
+}
+
+function messageText(harness: BridgeHarness): string {
+  return harness.updates.flatMap(update => (
+    update.sessionUpdate === 'agent_message_chunk' && update.content.type === 'text'
+      ? [update.content.text]
+      : []
+  )).join('')
+}
+
+describe('ACP prompt lifecycle', () => {
+  let harness: BridgeHarness | undefined
+
+  afterEach(async () => {
+    await harness?.dispose()
+    harness = undefined
+  })
+
+  it('maps a max-token turn without losing its committed text', async () => {
+    harness = await makeBridgeHarness({ script: [maxTokensResponse('cut off')] })
+    const sessionId = await newSession(harness)
+    const result = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+    expect(result.stopReason).toBe('max_tokens')
+    await vi.waitFor(() => { expect(messageText(harness!)).toBe('cut off') })
+  })
+
+  it('rejects a failed turn and never publishes its partial chunks', async () => {
+    harness = await makeBridgeHarness({ script: [errorResponse('provider boom')] })
+    const sessionId = await newSession(harness)
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
+      .rejects.toThrow(/turn failed: provider boom/)
+    expect(messageText(harness)).toBe('')
+  })
+
+  it('rejects an ordinary plugin failure through the same prompt boundary', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('must not run')] })
+    harness.ctx.on('agent/pre-step', () => { throw new Error('plugin pre-step failed') })
+    const sessionId = await newSession(harness)
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
+      .rejects.toThrow(/turn failed: plugin pre-step failed/)
+  })
+
+  it('settles even when an earlier turn observer throws', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('answer')] })
+    harness.ctx.on('session/event', (_session, event) => {
+      if (event.type === 'turn/start' || event.type === 'turn/end') throw new Error('peer listener boom')
+    }, { prepend: true })
+    const sessionId = await newSession(harness)
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
+      .resolves.toEqual({ stopReason: 'end_turn' })
+  })
+
+  it('ignores an injection turn while correlating the owning message turn', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('real answer')] })
+    const sessionId = await newSession(harness)
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    let injected = false
+    harness.ctx.on('agent/queued', (subject) => {
+      if (subject === agent && !injected) {
+        injected = true
+        agent.inject([{ type: 'text', text: 'context' }], { source: { kind: 'plugin', plugin: 'test' } })
+      }
+    })
+
+    const result = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+    expect(result.stopReason).toBe('end_turn')
+    await vi.waitFor(() => { expect(messageText(harness!)).toBe('real answer') })
+  })
+
+  it('ignores an autonomous message turn while correlating the client turn', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    const sessionId = await newSession(harness)
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    let inserted = false
+    harness.ctx.on('agent/queued', (subject, _content, info) => {
+      if (subject !== agent || info.source.kind !== 'user' || inserted) return
+      inserted = true
+      const source = { kind: 'plugin', plugin: 'test' } as const
+      agent.session.append('turn/start', { turn: 1, trigger: { kind: 'message', source } })
+      agent.session.append('user/message', {
+        content: [{ type: 'text', text: 'autonomous work' }],
+        source,
+      }, { surfaceOp: 'append' })
+      agent.session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
+    })
+
+    let settled = false
+    const prompt = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+      .finally(() => { settled = true })
+    await vi.waitFor(() => {
+      expect(agent.session.events.filter(event => event.type === 'turn/start')).toHaveLength(2)
+    })
+    expect(settled).toBe(false)
+    await harness.client.cancel({ sessionId })
+    await expect(prompt).resolves.toEqual({ stopReason: 'cancelled' })
+  })
+
+  it('permits only one in-flight prompt per session', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    const sessionId = await newSession(harness)
+    const first = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'one' }] })
+    await vi.waitFor(() => { expect(harness!.ctx.agents.get(SessionId(sessionId))?.status).toBe('running') })
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'two' }] }))
+      .rejects.toThrow(/already in flight/)
+    await harness.client.cancel({ sessionId })
+    await expect(first).resolves.toEqual({ stopReason: 'cancelled' })
+  })
+
+  it('cancels a running turn and records the aborted outcome', async () => {
+    harness = await makeBridgeHarness({ script: ['hang'] })
+    const sessionId = await newSession(harness)
+    const prompt = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
+    const agent = harness.ctx.agents.get(SessionId(sessionId))!
+    await vi.waitFor(() => { expect(agent.status).toBe('running') })
+    await harness.client.cancel({ sessionId })
+    await expect(prompt).resolves.toEqual({ stopReason: 'cancelled' })
+    await agent.whenIdle()
+    expect(agent.session.events.findLast(event => event.type === 'turn/end')?.data.reason).toEqual({ kind: 'aborted' })
+  })
+
+  it('an idle cancel does not affect the following prompt', async () => {
+    harness = await makeBridgeHarness({ script: [textResponse('answer')] })
+    const sessionId = await newSession(harness)
+    await harness.client.cancel({ sessionId })
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
+      .resolves.toEqual({ stopReason: 'end_turn' })
+    await vi.waitFor(() => { expect(messageText(harness!)).toBe('answer') })
+  })
+
+  it('a late end from a cancelled turn cannot settle the next prompt', async () => {
+    harness = await makeBridgeHarness({ script: ['hang', textResponse('next')] })
+    const sessionId = await newSession(harness)
+    const first = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'one' }] })
+    await vi.waitFor(() => { expect(harness!.ctx.agents.get(SessionId(sessionId))?.status).toBe('running') })
+    await harness.client.cancel({ sessionId })
+    await expect(first).resolves.toEqual({ stopReason: 'cancelled' })
+
+    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'two' }] }))
+      .resolves.toEqual({ stopReason: 'end_turn' })
+    await vi.waitFor(() => { expect(messageText(harness!)).toBe('next') })
+  })
+})
diff --git a/packages/acp/acp/tsconfig.json b/packages/acp/acp/tsconfig.json
new file mode 100644
index 0000000000..3109e0eea8
--- /dev/null
+++ b/packages/acp/acp/tsconfig.json
@@ -0,0 +1,33 @@
+{
+  "extends": "../../../tsconfig.base.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "lib/types"
+  },
+  "include": [
+    "src"
+  ],
+  "references": [
+    {
+      "path": "../../../vendor/cosmokit"
+    },
+    {
+      "path": "../../../vendor/cordis"
+    },
+    {
+      "path": "../../../vendor/schemastery"
+    },
+    {
+      "path": "../../core/session"
+    },
+    {
+      "path": "../../core/agent"
+    },
+    {
+      "path": "../../ui/user-approval"
+    },
+    {
+      "path": "../../support/invariants"
+    }
+  ]
+}
diff --git a/packages/context/README.md b/packages/context/README.md
index 4f06db67dd..933dd510ca 100644
--- a/packages/context/README.md
+++ b/packages/context/README.md
@@ -1,6 +1,6 @@
 # context/ — request-context extensions
 
-Product plugins that add model-visible request context without defining a tool. `workspace-context` is included by the default `dsh-agent-spine-demo` bundle and can be disabled through bundle config; `time-context` is opt-in, while the standard TUI and ACP bundles compose `session-reference` explicitly.
+Product plugins that add model-visible request context without defining a tool. `workspace-context` is included by the default `dsh-agent-spine-demo` bundle and can be disabled through bundle config; `time-context` is opt-in, while the standard TUI bundle composes `session-reference` explicitly.
 
 | Package | Role | ctx key |
 |---|---|---|
diff --git a/packages/context/session-reference/README.md b/packages/context/session-reference/README.md
index b3a4b2013d..57aa4fdcb0 100644
--- a/packages/context/session-reference/README.md
+++ b/packages/context/session-reference/README.md
@@ -1,6 +1,6 @@
 # `@deepseek-ai/dsh-session-reference`
 
-`ctx.sessionReferences` prepares bounded, read-only snapshots of other sessions as prompt-prefix context. It consumes `ctx.sessionQuery` and the backend-independent compact checkpoint marker; SQLite FTS is not required. The standard TUI and ACP demo bundles mount it, while other hosts may call the service directly.
+`ctx.sessionReferences` prepares bounded, read-only snapshots of other sessions as prompt-prefix context. It consumes `ctx.sessionQuery` and the backend-independent compact checkpoint marker; SQLite FTS is not required. The standard TUI bundle mounts it, while other hosts may call the service directly.
 
 ## Public API
 
@@ -12,7 +12,7 @@
 
 Preparation calls `ctx.sessionQuery.readSurface()` once per distinct source and never rereads it after enqueue. It projects only direct-user `user/message`, direct-user `steering/message`, assistant text, and `user/message` checkpoints carrying the canonical `dsh-compact` source marker from the folded current surface. For a source prompt that already contains baked prefix context, projection reads only its model-hidden display content, preventing recursive snapshot propagation. Shadowed pre-compaction events, tools, reasoning, context, plugin-generated user messages other than marked compact checkpoints, and unfinished assistant chunks are excluded. A compacted source therefore contributes its latest checkpoint plus retained later conversation, not restored shadowed text.
 
-The context source is `{ kind: 'plugin', plugin: 'session-reference' }` with `placement: 'prompt-prefix'`. Its metadata records version `1`, source ids and labels, capture seqs, compact presence, retained/omitted message counts, omitted UTF-8 bytes, and truncation state. AgentLoop writes the snapshot, `## My request:` delimiter, and effective prompt into one `user/message` or `steering/message`; the same event's model-hidden envelope retains the direct prompt and metadata for TUI/ACP replay. Later source mutation, compaction, or deletion cannot change target replay.
+The context source is `{ kind: 'plugin', plugin: 'session-reference' }` with `placement: 'prompt-prefix'`. Its metadata records version `1`, source ids and labels, capture seqs, compact presence, retained/omitted message counts, omitted UTF-8 bytes, and truncation state. AgentLoop writes the snapshot, `## My request:` delimiter, and effective prompt into one `user/message` or `steering/message`; the same event's model-hidden envelope retains the direct prompt and metadata for UI replay. Later source mutation, compaction, or deletion cannot change target replay.
 
 ## Configuration
 
diff --git a/packages/cordis/tool-cordis/src/present.ts b/packages/cordis/tool-cordis/src/present.ts
index e13570cf43..2f824003df 100644
--- a/packages/cordis/tool-cordis/src/present.ts
+++ b/packages/cordis/tool-cordis/src/present.ts
@@ -1,5 +1,5 @@
 /**
- * ACP render intents for the three cordis tools — all `generic` cards, decided
+ * UI render intents for the three cordis tools — all `generic` cards, decided
  * up front as part of the tool design. Presenters are pure functions of the
  * call arguments (they run on replay too): no I/O, no session state, no clock.
  * No `presentResult` overrides exist — the tools' text results are their
@@ -13,7 +13,7 @@ import type { GenericCallView } from '@deepseek-ai/dsh-tools'
 /**
  * The `cordis_inspect` call card: a read, titled with the requested section.
  * @param args - the validated call arguments.
- * @returns the generic card the ACP bridge renders.
+ * @returns the generic call card.
  */
 export function presentInspectCall(args: { what?: string; name?: string }): GenericCallView {
   const target = args.name === undefined ? args.what : `${args.what}: ${args.name}`
@@ -27,7 +27,7 @@ export function presentInspectCall(args: { what?: string; name?: string }): Gene
 /**
  * The `cordis_mount` call card: an execute carrying the mount code as raw input.
  * @param args - the validated call arguments.
- * @returns the generic card the ACP bridge renders.
+ * @returns the generic call card.
  */
 export function presentMountCall(args: { code: string }): GenericCallView {
   return {
@@ -41,7 +41,7 @@ export function presentMountCall(args: { code: string }): GenericCallView {
 /**
  * The `cordis_unmount` call card: a delete, titled with the mount id.
  * @param args - the validated call arguments.
- * @returns the generic card the ACP bridge renders.
+ * @returns the generic call card.
  */
 export function presentUnmountCall(args: { id: string }): GenericCallView {
   return {
diff --git a/packages/core/session/src/types.ts b/packages/core/session/src/types.ts
index 8b3a1e8cb6..9d1dbe3242 100644
--- a/packages/core/session/src/types.ts
+++ b/packages/core/session/src/types.ts
@@ -138,10 +138,9 @@ export type TurnEndReason = TurnEndReasonMap[keyof TurnEndReasonMap]
  *
  * Deliberately minimal: a human-readable `content` line and a three-state
  * `status`. No id, priority, or `activeForm` — the list is replaced wholesale
- * on every write (last-write-wins), so entries need no stable identity, and the
- * status triple is exactly the ACP `PlanEntryStatus`, so a UI bridge can map a
- * todo list onto an ACP `plan` 1:1 (synthesizing the priority ACP additionally
- * requires).
+ * on every write (last-write-wins), so entries need no stable identity. The
+ * three statuses describe the complete portable lifecycle needed by model and
+ * UI consumers.
  */
 export interface TodoItem {
   /** What this task is — a short imperative line shown in the UI. */
diff --git a/packages/core/tools/src/code-mode.ts b/packages/core/tools/src/code-mode.ts
index 30e85c3ad7..9497839607 100644
--- a/packages/core/tools/src/code-mode.ts
+++ b/packages/core/tools/src/code-mode.ts
@@ -363,7 +363,7 @@ export function createRunCodeTool(registry: ToolRegistry, requireRuntime: () =>
         exec.signal.removeEventListener('abort', onOuterAbort)
       }
     },
-    // ACP execute cards use the program as their visible title.
+    // The program is the call's always-visible UI label.
     presentCall: args => ({
       card: 'generic',
       title: args.code,
diff --git a/packages/core/tools/src/index.ts b/packages/core/tools/src/index.ts
index 468944fa2f..acd478fc29 100644
--- a/packages/core/tools/src/index.ts
+++ b/packages/core/tools/src/index.ts
@@ -69,7 +69,7 @@ export { defineContentToolFixture, type ContentToolFixtureOptions } from './test
 
 // The render-intent vocabulary a tool declares via `presentCall`/`presentResult`
 // lives in its own UI-facing module; re-export it so `@deepseek-ai/dsh-tools`
-// stays the single public surface for consumers (producers + the ACP bridge).
+// stays the single public surface for tool producers and UI adapters.
 export type {
   ToolCallKind,
   FileLocation,
diff --git a/packages/core/tools/src/presentation.ts b/packages/core/tools/src/presentation.ts
index e2fd2cf9ec..17b88b822f 100644
--- a/packages/core/tools/src/presentation.ts
+++ b/packages/core/tools/src/presentation.ts
@@ -8,19 +8,17 @@
 import type { ContentBlock } from '@deepseek-ai/dsh-llm'
 
 /**
- * Category of a tool call, used by a UI to pick an icon / treatment. A neutral
- * vocabulary owned here (NOT an ACP type) so tools describe themselves without
- * depending on any client protocol; a UI bridge maps it to its own enum. The
- * member set mirrors the common ACP `ToolKind` values; `other` is the default.
+ * Category of a tool call, used by a UI to pick an icon or treatment. The
+ * provider-neutral vocabulary lets tools describe themselves without depending
+ * on a particular client; `other` is the default.
  */
 export type ToolCallKind = 'read' | 'edit' | 'delete' | 'move' | 'search' | 'execute' | 'fetch' | 'other'
 
 /**
  * A file location a tool reads or modifies, so a capable UI can "follow along" —
- * highlight or jump to the file (and line) as the tool runs. Provider-neutral;
- * a UI bridge maps it to its own affordance (the ACP bridge forwards it as
- * `tool_call.locations`). `path` is what the tool operated on (the model-facing
- * path); `line` is an optional 1-based line to focus (e.g. a read's offset).
+ * highlight or jump to the file (and line) as the tool runs. `path` is what the
+ * tool operated on (the model-facing path); `line` is an optional 1-based line
+ * to focus (e.g. a read's offset).
  */
 export interface FileLocation {
   path: string
@@ -29,10 +27,9 @@ export interface FileLocation {
 
 /**
  * A single-file change a tool is about to make, for a UI that renders inline
- * diffs (an editor's diff card). Provider-neutral; the ACP bridge forwards it as
- * a `{ type: 'diff' }` tool-call content block. `oldText` is `null` for a
- * new-file create (nothing to diff against); an overwrite also uses `null`,
- * because a call-time presenter has no access to the file's prior content.
+ * diffs. `oldText` is `null` for a new-file create (nothing to diff against);
+ * an overwrite also uses `null`, because a call-time presenter has no access to
+ * the file's prior content.
  */
 export interface FileDiff {
   path: string
diff --git a/packages/core/tools/tests/code-mode.spec.ts b/packages/core/tools/tests/code-mode.spec.ts
index 0681ffc571..14f80c66d2 100644
--- a/packages/core/tools/tests/code-mode.spec.ts
+++ b/packages/core/tools/tests/code-mode.spec.ts
@@ -696,10 +696,8 @@ describe('the run_code dispatch bridge', () => {
   it('presents the program as the execute-card title', async () => {
     const { ctx } = await setup({ mode: 'code' })
     const tool = ctx.tools.get(RUN_CODE_NAME)!
-    // The program IS the title, mirroring how command tools title their cards
-    // with the command: an ACP client's execute-card header is the only
-    // always-visible slot (Zed renders no body content and no raw input for
-    // execute-kind cards without a real terminal).
+    // The program is the title, mirroring how command tools label their cards
+    // with the command while retaining the same value in the expanded input.
     expect(tool.presentCall?.({ code: 'return 1' })).toEqual({
       card: 'generic',
       title: 'return 1',
diff --git a/packages/examples/README.md b/packages/examples/README.md
index d247577b44..53f8583ce8 100644
--- a/packages/examples/README.md
+++ b/packages/examples/README.md
@@ -7,12 +7,12 @@ Pre-composed plugin bundles a thin leaf `cordis.yml` loads instead of assembling
 | `agent-spine-demo/` | `@deepseek-ai/dsh-agent-spine-demo` | The executor-less/UI-less agent spine as one bundle plugin, with fallback session titles and an opt-in persisted-goal stack |
 | `tui-demo/` | `@deepseek-ai/dsh-tui-demo` | Full-screen terminal app: the spine + persisted goals + `/goal` command + JSONL persistence + `dsh-tui` + a pre-created `main` agent, with a boot `bin` |
 | `cli-demo/` | `@deepseek-ai/dsh-cli-demo` | Headless one-shot app: the spine + JSONL persistence + a pre-created `main` agent, with text and DSH-native JSON output |
-| `acp-demo/` | `@deepseek-ai/dsh-acp-demo` | ACP server app: the spine + persisted goals + `/goal` command + JSONL persistence + the [`acp`](../ui/acp/README.md) bridge (no stdout logger), with a boot `bin` |
+| `acp-demo/` | `@deepseek-ai/dsh-acp-demo` | ACP automation server app: the spine + persisted goals + JSONL persistence + the [`acp`](../acp/acp/README.md) bridge (no stdout logger), with a boot `bin` |
 | `jsonrpc-demo/` | `@deepseek-ai/dsh-jsonrpc-demo` | Bin-only runtime that boots an external `cordis.yml` for the stdio JSON-RPC SDK client |
 
-`agent-spine-demo` is the shared bundle; `tui-demo`, `cli-demo`, and `acp-demo` compose it with full-screen terminal, headless one-shot, and ACP front doors and own their boot bins. `jsonrpc-demo` mounts no composition of its own — it boots whatever tree the deployment's `cordis.yml` names, and is what the Python SDK runtime launches.
+`agent-spine-demo` is the shared bundle; `tui-demo`, `cli-demo`, and `acp-demo` compose it with full-screen terminal, headless one-shot, and ACP automation front doors and own their boot bins. `jsonrpc-demo` mounts no composition of its own — it boots whatever tree the deployment's `cordis.yml` names, and is what the Python SDK runtime launches.
 
-These are **not** product API. The spine pieces they bundle live in [`core/`](../core/README.md), the bridges/channels/boot-glue in [`ui/`](../ui/README.md), and the swappable backends (LLM adapter, bash executor) in their capability groups; a demo bundle just picks one concrete composition of them. Swap or fork one freely.
+These are **not** product API. The spine pieces they bundle live in [`core/`](../core/README.md), human/SDK channels and boot glue in [`ui/`](../ui/README.md), the automation transport in [`acp/`](../acp/README.md), and swappable backends in their capability groups; a demo bundle just picks one concrete composition of them. Swap or fork one freely.
 
 Do not confuse this group with the repo-root [`examples/`](../../examples/AGENTS.md): that directory holds the runnable `cordis.yml` **leaves**; this group holds the **bundles** those leaves load.
 
diff --git a/packages/examples/acp-demo/README.md b/packages/examples/acp-demo/README.md
index fd90434d24..98bab2d3d5 100644
--- a/packages/examples/acp-demo/README.md
+++ b/packages/examples/acp-demo/README.md
@@ -1,77 +1,56 @@
 # @deepseek-ai/dsh-acp-demo
 
-The **ACP server app**: a Cordis app plugin that composes the default agent spine ([`@deepseek-ai/dsh-agent-spine-demo`](../agent-spine-demo/README.md)) with the front-door cluster an [Agent Client Protocol](../../ui/acp/README.md) server needs, and a `bin` that boots a leaf `cordis.yml` speaking ACP JSON-RPC on stdio.
+ACP automation server app: the default agent spine, client-created agents through [`@deepseek-ai/dsh-acp`](../../acp/acp/README.md), JSONL persistence, and semantic checkpointing behind one JSON-RPC stdio bin. Programmatic clients create fresh sessions; this package mounts no human UI.
 
-It is the structured counterpart to [`@deepseek-ai/dsh-tui-demo`](../tui-demo/README.md): both consume the same spine, but ACP creates sessions from its client and reserves stdout for its wire protocol.
+## Composition
 
-## What it bakes in — and what it deliberately omits
-
-stdout is the ACP JSON-RPC channel, so the cluster is defined as much by what it LEAVES OUT as what it includes:
-
-| Plugin | Why |
+| Plugin | Role |
 |---|---|
-| `@deepseek-ai/dsh-agent-spine-demo` | the spine, pre-creating **no** agents (ACP `session/new` creates them on demand) |
-| `@deepseek-ai/dsh-commands` | the human-command registry used for ACP discovery and direct slash dispatch |
-| `@deepseek-ai/dsh-command-goal` | the discoverable direct `/goal` producer; the app enables the spine's persisted-goal stack with it |
-| `@deepseek-ai/dsh-user-interaction` | the human question/answer seam used by clients that can complete ACP elicitation requests |
-| `@deepseek-ai/dsh-session-persistence-jsonl` | durable JSONL session log (the bridge advertises `loadSession`) |
-| `@deepseek-ai/dsh-session-query-sqlite` + `@deepseek-ai/dsh-session-reference` | combined exact/FTS session queries and bounded `dsh-session:` snapshots |
-| `@deepseek-ai/dsh-session-checkpoint-policy` | semantic durability barriers before model requests and top-level tool effects, plus completed-step checkpoints |
-| `@deepseek-ai/dsh-acp` | the bridge that owns stdout for JSON-RPC and provides ACP-backed user answers when a leaf explicitly exposes a user-question tool |
-| ~~`@deepseek-ai/dsh-tool-ask-user`~~ | **omitted by default** — ACP elicitation support is still client-dependent, so leaves must opt in deliberately |
-| ~~`@deepseek-ai/dsh-user-approval`~~ | **omitted by default** — permission policy is deployment-specific; sandbox/approval leaves opt in and the ACP bridge then supplies the answerer |
-| ~~console logger~~ | **omitted** — it writes to stdout and would corrupt the protocol frames ([the stdout-purity footgun](../../ui/acp/README.md)) |
-| ~~`hmr`~~ | **omitted** — the editor owns the subprocess |
+| `@deepseek-ai/dsh-agent-spine-demo` | Providerless agent spine with no pre-created agents; `session/new` creates each agent. |
+| `@deepseek-ai/dsh-session-persistence-jsonl` | Durable session logs used by checkpointing, observability, and snapshot replay. |
+| `@deepseek-ai/dsh-session-checkpoint-policy` | Durability barriers before model calls and top-level tool effects, plus completed-step checkpoints. |
+| `@deepseek-ai/dsh-acp` | Automation-only ACP transport over stdin/stdout. |
 
-The app owns this cluster through one ordered Cordis effect. Teardown drains the ACP bridge before removing the checkpoint policy or persistence backend, so a graceful disconnect persists the real closing `step/end` and `turn/end` events rather than leaving crash recovery to synthesize them. Because the package wires no logger entry, an ACP leaf has **nothing to get wrong by default**: it only picks backends. A leaf author can still add `@cordisjs/plugin-logger-console` as a sibling entry, so the rule remains: never add a stdout logger to an ACP leaf; use a stderr exporter instead.
+The app does not install commands, user interaction, session navigation, configuration pickers, or a stdout logger. It owns the four plugins through one ordered effect so ACP sessions quiesce before checkpointing and persistence detach. Leaf configurations supply LLM, executor, sandbox, approval, filesystem, and model-facing tool plugins.
 
 ## Config
 
 | Key | Default | Routed to |
 |---|---|---|
-| `provider` | (required) | the initial provider route for each per-session agent the bridge creates; ACP model selection may replace it per session |
-| `model` | (required) | the initial model for each per-session agent; ACP clients may switch among adapter-advertised models |
-| `maxParallelToolCalls` | agent-loop default | positive-integer concurrent tool-call cap shared by the bundled loop's agents; `1` is serial |
-| `persona` | — | the deployment persona template (may reference `{{provider}}`/`{{model}}`/`{{cwd}}`), routed to `dsh-system-prompt` |
-| `toolOrder` | — | explicit model-facing tool order (a name list with one `'<unlisted-tools>'` rest entry; absent — lexicographic; an unregistered name fails each turn at prompt assembly), routed to `dsh-system-prompt` |
-| `dshHome` | `$DSH_HOME` or `~/.dsh` | Harness home exposed to model bash and used by local skill discovery |
-| `sessionTitle` | spine example limits | fallback title word/byte limits routed through `dsh-agent-spine-demo` |
-| `tools` | `{ mode: 'native' }` | tool-registry presentation config (`native` / `code` / `both`), routed through `dsh-agent-spine-demo` |
-| `workspaceContext` | (required) | workspace-instruction byte budget/config, or `false`; routed to the providerless-safe `dsh-workspace-context` plugin |
-| `skills` | owner defaults | registry-cache, local-provider, and model-facing skill-tool config, routed through `dsh-agent-spine-demo` |
-| `toolBash` | owner defaults | model-facing bash config routed through `dsh-agent-spine-demo`, including bash's producer-local `enableRunInBackground` |
-| `toolTasks` | owner defaults | generic `task_output` wait bounds routed through `dsh-agent-spine-demo` |
-| `goals` | owner defaults | persisted goal-domain and model-tool config; `false` removes the goal stack and `/goal` producer |
-| `llmRetry` | owner defaults | bounded transient model-request retry policy routed through `dsh-agent-spine-demo` |
-| `persistenceRoot` | `./.sessions` | the JSONL backend's root directory and the parent of the derived `session-query.db` index |
-| `packChunks` | `false` | write delta-chunk runs as packed storage rows (the JSONL backend's `packChunks`) |
-| `persistenceCompression` | `'zstd'` | JSONL artifact encoding (`'zstd'` or raw `'none'`) |
-| `sessionReferences` | service defaults | cross-session candidate and snapshot limits routed to `dsh-session-reference` |
+| `provider` | required | Provider route for each ACP-created agent. |
+| `model` | required | Model for each ACP-created agent. |
+| `maxParallelToolCalls` | agent-loop default | Positive-integer tool-call concurrency cap; `1` is serial. |
+| `persona` | — | Deployment persona template for `dsh-system-prompt`. |
+| `toolOrder` | lexicographic | Explicit model-facing tool order for `dsh-system-prompt`. |
+| `tools` | `{ mode: 'native' }` | Native, Code Mode, or combined model tool transport. |
+| `dshHome` | `$DSH_HOME` or `~/.dsh` | Harness home shared by bash and local skill discovery. |
+| `sessionTitle` | spine example limits | Durable fallback-title limits; titles remain off the ACP wire. |
+| `persistenceRoot` | `./.sessions` | JSONL backend root. |
+| `packChunks` | `false` | Pack consecutive delta-chunk events in storage. |
+| `persistenceCompression` | `zstd` | Checksummed Zstandard frames or raw `none`. |
+| `workspaceContext` | required | Workspace-instruction byte budget/config, or `false`. |
+| `skills` | owner defaults | Skill registry, local provider, and model-facing skill tool. |
+| `toolBash` | owner defaults | Model-facing bash tool config. |
+| `toolTasks` | owner defaults | Generic background-task control config, or `false`. |
+| `goals` | owner defaults | Persisted same-session goal domain and model tools, or `false`. |
+| `llmRetry` | owner defaults | Bounded transient model-request retry policy. |
 
-The leaf supplies the swappable backends: an LLM adapter (`llm-deepseek` for the real model, `llm-replay` for keyless snapshot replay), a bash executor, and optionally a `ctx.fs` provider. Workspace context becomes a no-op without `ctx.fs`; the shipped [`examples/acp-agent/cordis.yml`](../../../examples/acp-agent/cordis.yml) selects `dsh-sandbox-policy`, `dsh-fs-sandbox`, `dsh-fs-policy`, and `dsh-tool-fs` so baseline instructions and model-facing `read`/`write`/`edit` share one provider, sandbox mode, workspace root, and observed-version policy.
+The shipped [`examples/acp-agent/cordis.yml`](../../../examples/acp-agent/cordis.yml) adds the DeepSeek adapter, sandboxed bash and filesystem providers, one-shot approval policy, compaction, subagents, workflows, hooks, and model-facing tools. Snapshot overlays replace only nondeterministic providers or policy values.
 
-## The bin
+## Bin
 
-`dsh-acp-demo [--config path-to-cordis.yml]` (short form `-c`; default `./cordis.yml`):
-
-- loads a gitignored `.env` from the cwd — **skipped** in snapshot REPLAY so a stray key can never trigger a live call;
-- honors `DSH_SNAPSHOT=replay` by booting the sibling `cordis.snapshot.yml` (the keyless replay tree, `llm-replay` in place of `llm-deepseek`);
-- in a snapshot run, disposes the context on stdin EOF so the session log is fully flushed before exit.
-
-Run it under `node --expose-internals`, or Loader's optional `node-addon-require-builtin` fallback is required, so the cordis Loader can resolve the config's bare plugin specifiers through its internal module loader. (`demo:acp` runs under tsx, whose tsconfig `paths` map resolves them instead.)
-
-All diagnostics go to **stderr** — stdout is the protocol.
+`dsh-acp-demo [--config path-to-cordis.yml]` (short form `-c`; default `./cordis.yml`) loads the gitignored `.env`, except in replay mode; `DSH_SNAPSHOT=replay` selects the sibling `cordis.snapshot.yml`; stdin EOF disposes the context and flushes sessions before exit. Run built output under `node --expose-internals` (or Loader's `node-addon-require-builtin` fallback) so bare plugin specifiers resolve. Diagnostics use stderr because stdout is the ACP wire.
 
 ## Model Experience
 
-Indirectly, through `dsh-agent-spine-demo` and `dsh-acp`, which compose each ACP agent's prompt, goal tools, and message history. Direct `/goal` input and output remain outside the model, while accepted mutations append domain-owned model-visible snapshots.
+Indirectly, through `dsh-agent-spine-demo` and the leaf's model-facing plugins. ACP prompt text becomes the ordinary logged user message; protocol metadata and permission choices do not enter the model request.
 
 #### KV Cache effect
 
-No direct invalidation; the named consumer owns any request-prefix changes.
+Append-only per session; the app adds no request-prefix content itself.
 
 ## Known Limitations and Deferred Work
 
-- **JSONL persistence is baked in** — config chooses its root but cannot select a different backend; that requires a sibling entry or differently composed app package.
-- **User-question and approval mechanisms are omitted by default** — the bridge can answer both when their services/tools are composed, but this front door does not enable those deployment policies itself.
-- **A leaf can still corrupt stdout** — the app mounts no console logger, but it cannot prevent a sibling leaf entry from writing non-protocol bytes to the ACP channel.
+- **JSONL persistence is fixed** — a different backend requires another composition.
+- **Sibling plugins can corrupt stdout** — the app cannot prevent another entry from writing non-protocol bytes.
+- **Fresh automation sessions only** — resume and human interaction belong to other front doors.
diff --git a/packages/examples/acp-demo/package.json b/packages/examples/acp-demo/package.json
index 36de692404..86070de653 100644
--- a/packages/examples/acp-demo/package.json
+++ b/packages/examples/acp-demo/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@deepseek-ai/dsh-acp-demo",
-  "description": "ACP server app: agent spine + human commands + JSONL persistence + ACP bridge (no stdout logger, hmr, or pre-created agents), with a JSON-RPC stdio bin",
+  "description": "ACP automation server app: agent spine + JSONL persistence + ACP transport, with a JSON-RPC stdio bin",
   "version": "0.0.1",
   "private": true,
   "type": "module",
@@ -38,18 +38,12 @@
     "@cordisjs/plugin-include": "^1.0.4",
     "@cordisjs/plugin-loader": "^1.0.0-rc.5",
     "@deepseek-ai/dsh-acp": "^0.0.1",
-    "@deepseek-ai/dsh-commands": "^0.0.1",
-    "@deepseek-ai/dsh-command-goal": "^0.0.1",
     "@deepseek-ai/dsh-agent-spine-demo": "^0.0.1",
     "@deepseek-ai/dsh-app-boot": "^0.0.1",
     "@deepseek-ai/dsh-invariants": "^0.0.1",
     "@deepseek-ai/dsh-session-checkpoint-policy": "^0.0.1",
     "@deepseek-ai/dsh-session-persistence-jsonl": "^0.0.1",
-    "@deepseek-ai/dsh-session-query": "^0.0.1",
-    "@deepseek-ai/dsh-session-query-sqlite": "^0.0.1",
-    "@deepseek-ai/dsh-session-reference": "^0.0.1",
     "@deepseek-ai/dsh-tools": "^0.0.1",
-    "@deepseek-ai/dsh-user-interaction": "^0.0.1",
     "@deepseek-ai/dsh-workspace-context": "^0.0.1",
     "cordis": "^4.0.0-rc.7",
     "schemastery": "^3.17.0"
@@ -58,20 +52,14 @@
     "@cordisjs/plugin-include": "workspace:^",
     "@cordisjs/plugin-loader": "workspace:^",
     "@deepseek-ai/dsh-acp": "workspace:^",
-    "@deepseek-ai/dsh-commands": "workspace:^",
-    "@deepseek-ai/dsh-command-goal": "workspace:^",
     "@deepseek-ai/dsh-agent": "workspace:^",
     "@deepseek-ai/dsh-agent-spine-demo": "workspace:^",
     "@deepseek-ai/dsh-app-boot": "workspace:^",
     "@deepseek-ai/dsh-invariants": "workspace:^",
     "@deepseek-ai/dsh-session-checkpoint-policy": "workspace:^",
     "@deepseek-ai/dsh-session-persistence-jsonl": "workspace:^",
-    "@deepseek-ai/dsh-session-query": "workspace:^",
-    "@deepseek-ai/dsh-session-query-sqlite": "workspace:^",
-    "@deepseek-ai/dsh-session-reference": "workspace:^",
     "@deepseek-ai/dsh-system-prompt": "workspace:^",
     "@deepseek-ai/dsh-tools": "workspace:^",
-    "@deepseek-ai/dsh-user-interaction": "workspace:^",
     "@deepseek-ai/dsh-workspace-context": "workspace:^",
     "cordis": "^4.0.0-rc.7",
     "schemastery": "^3.17.0"
diff --git a/packages/examples/acp-demo/src/bin.ts b/packages/examples/acp-demo/src/bin.ts
index 60127760e4..3f528a5fca 100644
--- a/packages/examples/acp-demo/src/bin.ts
+++ b/packages/examples/acp-demo/src/bin.ts
@@ -5,7 +5,7 @@
  * loading, Loader guards, snapshot config selection, and settled-tree boot live
  * in dsh-app-boot. Replay skips `.env` and selects sibling
  * `cordis.snapshot.yml` so a stray key cannot trigger a model call. EOF disposes
- * and flushes snapshot runs; editors normally own process lifetime. Stdout is
+ * and flushes snapshot runs; the calling automation owns process lifetime. Stdout is
  * reserved for JSON-RPC, so diagnostics go only to stderr.
  * @module @deepseek-ai/dsh-acp-demo/bin
  */
diff --git a/packages/examples/acp-demo/src/index.ts b/packages/examples/acp-demo/src/index.ts
index 1a05a14e3e..9ddd5b2be9 100644
--- a/packages/examples/acp-demo/src/index.ts
+++ b/packages/examples/acp-demo/src/index.ts
@@ -1,7 +1,7 @@
 /**
- * The ACP server app: the default agent spine ({@link @deepseek-ai/dsh-agent-spine-demo}),
- * human-command registry, JSONL session persistence, and the
- * {@link @deepseek-ai/dsh-acp} bridge. The app owns those plugins through one
+ * The ACP automation server app: the default agent spine
+ * ({@link @deepseek-ai/dsh-agent-spine-demo}), JSONL session persistence, and
+ * the {@link @deepseek-ai/dsh-acp} bridge. The app owns those plugins through one
  * ordered lifecycle so ACP sessions quiesce before persistence detaches. It
  * writes nothing to stdout.
  * It pre-creates no agents and leaves adapters, executors, and optional tools to
@@ -12,11 +12,8 @@
  */
 
 import type { Context } from 'cordis'
-import { join } from 'node:path'
 import z from 'schemastery'
 import * as acp from '@deepseek-ai/dsh-acp'
-import CommandService from '@deepseek-ai/dsh-commands'
-import * as commandGoal from '@deepseek-ai/dsh-command-goal'
 import * as agentCore from '@deepseek-ai/dsh-agent-spine-demo'
 import * as workspaceContext from '@deepseek-ai/dsh-workspace-context'
 import ToolRegistry, { type Config as ToolsConfig } from '@deepseek-ai/dsh-tools'
@@ -25,17 +22,13 @@ import SessionPersistenceJsonl, {
   type JsonlCompression,
 } from '@deepseek-ai/dsh-session-persistence-jsonl'
 import * as sessionCheckpointPolicy from '@deepseek-ai/dsh-session-checkpoint-policy'
-import UserInteractionService from '@deepseek-ai/dsh-user-interaction'
-import SessionQuerySqlite from '@deepseek-ai/dsh-session-query-sqlite'
-import SessionReferenceService, { type Config as SessionReferenceConfig } from '@deepseek-ai/dsh-session-reference'
 
 export const name = 'acp-demo'
 const DEFAULT_PERSISTENCE_ROOT = './.sessions'
 
 /**
- * App config: the swappable per-deployment values. `provider` and `model` configure the
- * agent template the ACP bridge creates each session's agent from (NOT a
- * pre-created agent — ACP creates agents at `session/new`); `persona` is the
+ * App config: the swappable per-deployment values. `provider` and `model` configure
+ * each agent the ACP bridge creates at `session/new`; `persona` is the
  * deployment persona (forwarded to the system-prompt plugin); `toolOrder` is
  * the explicit model-facing tool order (forwarded to the system-prompt plugin);
  * `tools` is the tool registry's config (its presentation `mode`, forwarded
@@ -58,14 +51,12 @@ export interface Config {
   dshHome?: string
   /** Fallback session-title limits forwarded through agent-spine-demo. */
   sessionTitle?: NonNullable<agentCore.Config['sessionTitle']>
-  /** Directory for JSONL sessions and the derived query index. Defaults to `./.sessions`. */
+  /** Directory for JSONL sessions. Defaults to `./.sessions`. */
   persistenceRoot?: string
   /** Write delta-chunk runs as packed storage rows (the JSONL backend's `packChunks`). Defaults to `false`. */
   packChunks?: boolean
   /** JSONL artifact encoding; defaults to checksummed Zstandard frames. */
   persistenceCompression?: JsonlCompression
-  /** Cross-session reference discovery and snapshot byte budgets. */
-  sessionReferences?: SessionReferenceConfig
   /** Controls automatic AGENTS.md/CLAUDE.md loading; configure a byte budget or set `false`. */
   workspaceContext: agentCore.Config['workspaceContext']
   /** Skill registry, local-provider, and model-facing consumer config forwarded to agent-spine-demo. */
@@ -74,7 +65,7 @@ export interface Config {
   toolBash?: NonNullable<agentCore.Config['toolBash']>
   /** Generic background-task controls forwarded through agent-core; set false to omit their tool surface. */
   toolTasks?: NonNullable<agentCore.Config['toolTasks']>
-  /** Persisted same-session goals; owner defaults enable them, or false disables the stack and command. */
+  /** Persisted same-session goals; owner defaults enable them, or false disables the stack and tools. */
   goals?: agentCore.GoalConfig | false
   /** Bounded transient model-request retry policy forwarded through agent-core. */
   llmRetry?: NonNullable<agentCore.Config['llmRetry']>
@@ -98,7 +89,6 @@ export const Config: z<Config> = z.object({
   persistenceRoot: z.string().default(DEFAULT_PERSISTENCE_ROOT),
   packChunks: z.boolean().default(false),
   persistenceCompression: JsonlCompressionSchema,
-  sessionReferences: SessionReferenceService.Config,
   workspaceContext: z.union([z.const(false), workspaceContext.Config]).required(),
   skills: agentCore.SkillConfigSchema,
   toolBash: agentCore.ToolBashConfigSchema,
@@ -109,9 +99,9 @@ export const Config: z<Config> = z.object({
 /* jscpd:ignore-end */
 
 /**
- * Compose the spine with the ACP front door. The agent-spine-demo bundle pre-creates
+ * Compose the spine with the ACP automation transport. The agent-spine-demo bundle pre-creates
  * NO agents (its `agents` list defaults to `[]`) and carries the deployment
- * `persona`; the JSONL backend and derived query index persist under
+ * `persona`; the JSONL backend persists under
  * `persistenceRoot`; the ACP bridge owns stdout for JSON-RPC and creates one
  * agent per `session/new` from the provider/model pair. The composite effect
  * unloads in reverse order, keeping checkpoint and persistence listeners
@@ -122,10 +112,7 @@ export function apply(ctx: Context, config: Config): void {
   const goals = config.goals ?? {}
   const persistenceRoot = config.persistenceRoot ?? DEFAULT_PERSISTENCE_ROOT
   ctx.effect(function* () {
-    yield ctx.plugin(CommandService).dispose
-    if (goals !== false) yield ctx.plugin(commandGoal).dispose
     yield ctx.plugin(agentCore, { ...agentCore.pickSpineConfig(config), goals }).dispose
-    yield ctx.plugin(UserInteractionService).dispose
     // Same rationale as the Config schema above: each front door forwards its own
     // persistence passthroughs rather than sharing a facade with stdio-demo.
     /* jscpd:ignore-start */
@@ -136,8 +123,6 @@ export function apply(ctx: Context, config: Config): void {
     }).dispose
     /* jscpd:ignore-end */
     yield ctx.plugin(sessionCheckpointPolicy).dispose
-    yield ctx.plugin(SessionQuerySqlite, { path: join(persistenceRoot, 'session-query.db') }).dispose
-    yield ctx.plugin(SessionReferenceService, config.sessionReferences ?? {}).dispose
     yield ctx.plugin(acp, { provider: config.provider, model: config.model }).dispose
   }, 'acp-demo.composition')
 }
diff --git a/packages/examples/acp-demo/tests/acp-agent.spec.ts b/packages/examples/acp-demo/tests/acp-agent.spec.ts
index 18cd0b5221..e932c7fb17 100644
--- a/packages/examples/acp-demo/tests/acp-agent.spec.ts
+++ b/packages/examples/acp-demo/tests/acp-agent.spec.ts
@@ -5,7 +5,6 @@ import { tmpdir } from 'node:os'
 import { Context } from 'cordis'
 import Loader from '@cordisjs/plugin-loader'
 import { agentEvents, type Agent } from '@deepseek-ai/dsh-agent'
-import { SessionId } from '@deepseek-ai/dsh-session'
 import { TOOL_ORDER_REST } from '@deepseek-ai/dsh-system-prompt'
 import type { Message } from '@deepseek-ai/dsh-llm'
 import * as acpAgent from '../src/index.ts'
@@ -84,32 +83,27 @@ describe('dsh-acp-demo composition', () => {
       persona: 'hi',
       persistenceRoot: '/tmp/dsh-acp-demo-test',
       persistenceCompression: 'none',
-      sessionReferences: { candidateLimit: 1 },
       skills: await isolatedSkillsConfig(),
       workspaceContext: false,
     })
     expect(ctx.get('agents')).toBeDefined()
     expect(ctx.get('sessions')).toBeDefined()
     expect(ctx.get('sessionPersistence')).toBeDefined()
-    expect(ctx.get('sessionQuery')).toBeDefined()
-    expect(ctx.get('sessionReferences')).toBeDefined()
+    expect(ctx.get('sessionQuery')).toBeUndefined()
+    expect(ctx.get('sessionReferences')).toBeUndefined()
     expect((ctx.get('sessionPersistence') as unknown as { config: { compression?: string } }).config.compression).toBe('none')
     expect(ctx.get('agentLoop')).toBeDefined()
-    expect(ctx.get('userInteraction')).toBeDefined()
+    expect(ctx.get('userInteraction')).toBeUndefined()
+    expect(ctx.get('commands')).toBeUndefined()
     expect(ctx.get('tools')?.get('ask_user_question')).toBeUndefined()
     expect(ctx.get('goals')).toBeDefined()
     expect(ctx.get('tools')?.get('get_goal')).toBeDefined()
-    const target = ctx.sessions.create(SessionId('candidate-target'))
-    ctx.sessions.create(SessionId('candidate-one'))
-    ctx.sessions.create(SessionId('candidate-two'))
-    await expect(ctx.sessionReferences.listCandidates({ id: target.id, session: target } as Agent))
-      .resolves.toHaveLength(1)
     // No pre-created agents — ACP session/new creates them on demand.
     expect(ctx.get('agents')!.list()).toHaveLength(0)
     await ctx.fiber.dispose()
   })
 
-  it('can explicitly omit the persisted-goal stack and its command', async () => {
+  it('can explicitly omit the persisted-goal stack', async () => {
     const ctx = await mount({
       provider: 'mock',
       model: 'mock',
@@ -117,12 +111,7 @@ describe('dsh-acp-demo composition', () => {
       workspaceContext: false,
     })
     expect(ctx.get('goals')).toBeUndefined()
-    const handle = await ctx.agents.create({
-      sessionId: 'disabled-goals' as import('@deepseek-ai/dsh-session').SessionId,
-      agentOptions: { provider: 'mock', model: 'mock' },
-    })
-    expect(ctx.commands.find(handle.agent, 'goal')).toBeUndefined()
-    await handle.dispose()
+    expect(ctx.get('tools')?.get('get_goal')).toBeUndefined()
     await ctx.fiber.dispose()
   })
 
diff --git a/packages/examples/acp-demo/tests/built-bin.e2e.ts b/packages/examples/acp-demo/tests/built-bin.e2e.ts
index a578a7ae85..6372582586 100644
--- a/packages/examples/acp-demo/tests/built-bin.e2e.ts
+++ b/packages/examples/acp-demo/tests/built-bin.e2e.ts
@@ -18,7 +18,6 @@ import { Readable, Writable } from 'node:stream'
 import { promisify } from 'node:util'
 import { zstdDecompress } from 'node:zlib'
 import { afterEach, describe, expect, it } from 'vitest'
-import { ACP_SESSION_REFERENCE_META_KEY } from '@deepseek-ai/dsh-acp'
 
 /**
  * Published-entry smoke: run `lib/bin.js` under plain Node in a symlinked external consumer and
@@ -37,8 +36,7 @@ const dshPackages = [
   'bash/bash-local', 'bash/tool-bash', 'context/workspace-context', 'support/invariants', 'ui/app-boot',
   'session-persistence/session-persistence',
   'session-persistence/session-checkpoint-policy', 'session-persistence/session-persistence-jsonl',
-  'session-query/session-query', 'session-query/session-query-sqlite',
-  'context/session-reference', 'ui/acp', 'examples/acp-demo', 'util/paths',
+  'acp/acp', 'examples/acp-demo', 'util/paths',
 ]
 const vendorPackages = [
   'cordis', 'loader', 'include', 'timer', 'hmr', 'logger-console',
@@ -46,8 +44,8 @@ const vendorPackages = [
 ]
 // Resolve ACP's declared third-party dependencies from that package, not this test: pnpm's strict
 // layout need not hoist them. Symlink those exact paths into the plain-Node consumer.
-const npmDeps = ['@agentclientprotocol/sdk', 'zod']
-const acpPkgDir = join(repoRoot, 'packages/ui/acp')
+const npmDeps = ['@agentclientprotocol/sdk']
+const acpPkgDir = join(repoRoot, 'packages/acp/acp')
 
 async function pkgName(absDir: string): Promise<string> {
   const json = JSON.parse(await readFile(join(absDir, 'package.json'), 'utf8')) as { name: string }
@@ -73,7 +71,7 @@ async function makeConsumer(): Promise<string> {
     await link(abs, await pkgName(abs), nm)
   }
   for (const dep of npmDeps) {
-    // Resolve from `ui/acp`'s package.json URL (the package that declares the
+    // Resolve from ACP's package.json URL (the package that declares the
     // dep), not this test file's location — `acp-agent` does not depend on these.
     const fromAcp = pathToFileURL(join(acpPkgDir, 'package.json')).href
     const resolved = fileURLToPath(import.meta.resolve(`${dep}/package.json`, fromAcp))
@@ -155,8 +153,12 @@ describe.skipIf(!existsSync(acpBin))('dsh-acp-demo BUILT bin (node lib/bin.js, n
       Writable.toWeb(child.stdin!) as WritableStream<Uint8Array>,
       Readable.toWeb(passthrough) as ReadableStream<Uint8Array>,
     )
+    const updates: SessionNotification['update'][] = []
     const makeClient = (_a: AcpAgent): Client => ({
-      sessionUpdate(_p: SessionNotification): Promise<void> { return Promise.resolve() },
+      sessionUpdate(params: SessionNotification): Promise<void> {
+        updates.push(params.update)
+        return Promise.resolve()
+      },
       requestPermission(_p: RequestPermissionRequest): Promise<RequestPermissionResponse> {
         return Promise.resolve({ outcome: { outcome: 'cancelled' } })
       },
@@ -164,33 +166,17 @@ describe.skipIf(!existsSync(acpBin))('dsh-acp-demo BUILT bin (node lib/bin.js, n
     const client = new ClientSideConnection(makeClient, stream)
 
     const init = await client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    // A response at all proves the built bin booted the bridge (the settle-race
-    // regression would exit before answering); loadSession proves the real app
-    // mounted, not a collapsed export shape.
-    expect(init.agentCapabilities?.loadSession).toBe(true)
-    expect(init.agentCapabilities?.sessionCapabilities?.list).toEqual({})
+    expect(init.agentCapabilities).toEqual({
+      promptCapabilities: { image: false, audio: false, embeddedContext: false },
+    })
     const sessionCwd = consumer
     const { sessionId } = await client.newSession({ cwd: sessionCwd, mcpServers: [] })
     const result = await client.prompt({ sessionId, prompt: [{ type: 'text', text: 'reply' }] })
     expect(result.stopReason).toBe('end_turn')
-    await expect.poll(async () => {
-      return (await client.listSessions({ cwd: sessionCwd })).sessions.find(candidate => candidate.sessionId === sessionId)
-    }).toMatchObject({
-      sessionId,
-      cwd: sessionCwd,
-      title: 'reply',
-    })
-    const listed = await client.listSessions({ cwd: sessionCwd })
-    const reference = listed.sessions.find(candidate => candidate.sessionId === sessionId)
-      ?._meta?.[ACP_SESSION_REFERENCE_META_KEY]
-    expect(reference).toBeTypeOf('object')
-    expect(reference).not.toBeNull()
-    expect(reference).toHaveProperty('uri')
-    if (typeof reference !== 'object' || reference === null || !('uri' in reference)) {
-      throw new Error('expected session reference metadata')
-    }
-    expect(reference.uri).toBeTypeOf('string')
-    expect(reference.uri).toMatch(/^dsh-session:[A-Za-z0-9_-]+$/u)
+    await expect.poll(() => updates).toEqual([{
+      sessionUpdate: 'agent_message_chunk',
+      content: { type: 'text', text: 'ACP BUILT OK' },
+    }])
     const sessionsRoot = join(sessionCwd, '.sessions')
     let log: string | undefined
     await expect.poll(async () => {
diff --git a/packages/examples/acp-demo/tests/load-path.e2e.ts b/packages/examples/acp-demo/tests/load-path.e2e.ts
index 982fac3b50..43db72b847 100644
--- a/packages/examples/acp-demo/tests/load-path.e2e.ts
+++ b/packages/examples/acp-demo/tests/load-path.e2e.ts
@@ -17,11 +17,10 @@ import {
 } from '@agentclientprotocol/sdk'
 
 /**
- * Source-path Loader smoke through the package's own bin, covering initialize, session/new, and
- * session/load across the `unwrapExports` path implicated by postmortem 0001. Session creation and
- * unknown-id loading reach factories but not the model, so a dummy key is sufficient. The temp cwd
- * is also the session workspace, and an explicit root tsconfig keeps unbuilt path aliases resolvable
- * when the child starts outside the repository.
+ * Source-path Loader smoke through the package's own bin, covering the
+ * automation server's initialize and fresh-session path across the
+ * `unwrapExports` shape implicated by postmortem 0001. Session creation reaches
+ * the factory but not the model, so a dummy key is sufficient.
  */
 
 const binScript = fileURLToPath(new URL('../src/bin.ts', import.meta.url))
@@ -107,7 +106,7 @@ async function boot(): Promise<Spawned & { cwd: string }> {
 }
 
 describe('dsh-acp-demo real-load-path smoke (bin + Loader, keyless)', () => {
-  it('boots via its bin and answers initialize → session/new → session/load', async () => {
+  it('boots via its bin and exposes only fresh text sessions', async () => {
     const { client, cwd, stderr } = await boot()
     // initialize: a broken export shape (collapsed bridge plugin, dropped inject)
     // crashes the tree on the first service read here — see postmortem 0001.
@@ -115,22 +114,14 @@ describe('dsh-acp-demo real-load-path smoke (bin + Loader, keyless)', () => {
       protocolVersion: PROTOCOL_VERSION,
       clientCapabilities: {},
     })
-    expect(init.agentCapabilities?.loadSession).toBe(true)
+    expect(init.agentCapabilities).toEqual({
+      promptCapabilities: { image: false, audio: false, embeddedContext: false },
+    })
 
     // session/new reaches the agent FACTORY (create) without the model.
     const { sessionId } = await client.newSession({ cwd, mcpServers: [] })
     expect(sessionId).toBeTruthy()
 
-    // session/load reaches the resume FACTORY + persistence without the model: load an UNKNOWN
-    // id (loading the live `sessionId` would correctly reject as "already loaded"). Persistence
-    // and resume run from the JSON-RPC loop outside bridge injection; a healthy tree reaches
-    // not-found, while a collapsed export would fail earlier with missing injection.
-    const unknownId = '00000000-0000-4000-8000-000000000000'
-    await client.loadSession({ sessionId: unknownId, cwd, mcpServers: [] }).then(
-      () => { throw new Error('expected session/load of an unknown id to reject') },
-      (error: unknown) => { expect(String(error)).not.toContain('without inject') },
-    )
-
     expect(stderr.join('')).not.toContain('without inject')
   }, 30_000)
 })
diff --git a/packages/examples/acp-demo/tsconfig.json b/packages/examples/acp-demo/tsconfig.json
index 0115fc938b..6d70ca2351 100644
--- a/packages/examples/acp-demo/tsconfig.json
+++ b/packages/examples/acp-demo/tsconfig.json
@@ -21,22 +21,7 @@
       "path": "../../ui/app-boot"
     },
     {
-      "path": "../../ui/acp"
-    },
-    {
-      "path": "../../session-query/session-query"
-    },
-    {
-      "path": "../../session-query/session-query-sqlite"
-    },
-    {
-      "path": "../../context/session-reference"
-    },
-    {
-      "path": "../../ui/commands"
-    },
-    {
-      "path": "../../goal/command-goal"
+      "path": "../../acp/acp"
     },
     {
       "path": "../../core/agent"
@@ -47,12 +32,6 @@
     {
       "path": "../../context/workspace-context"
     },
-    {
-      "path": "../../ui/user-interaction"
-    },
-    {
-      "path": "../../ui/tool-ask-user"
-    },
     {
       "path": "../../session-persistence/session-checkpoint-policy"
     },
diff --git a/packages/examples/agent-spine-demo/README.md b/packages/examples/agent-spine-demo/README.md
index 57d5922535..05ea5c75e2 100644
--- a/packages/examples/agent-spine-demo/README.md
+++ b/packages/examples/agent-spine-demo/README.md
@@ -45,7 +45,7 @@ The spine is everything COMMON to every front door. The swappable and front-door
 - **model-backed session-title providers** — the bundle mounts the fallback service with overridable example limits (5 words, 40 fallback bytes, 80 accepted-title bytes); a leaf may opt into exactly one first-message or all-messages LLM provider.
 - **the bash executor** — the bundle ships `tool-bash` (the consumer schema); the leaf provides `ctx.bash` (`bash-local` or a sandboxed impl).
 - **non-local skill providers** — the bundle ships the skill registry, the local filesystem provider, and the `skill` tool; deployments can add other providers such as embedded or remote catalogs as siblings.
-- **presentation + per-app infra** — the terminal TUI or ACP front door and `hmr`. These form the coupled front-door cluster that the app packages ([`dsh-tui-demo`](../tui-demo/README.md), [`dsh-acp-demo`](../acp-demo/README.md)) bake in. `timer` is in the spine because it is common and stdout-silent; front doors own stdout and remain outside.
+- **front-door + per-app infra** — the terminal TUI or ACP automation transport and `hmr`. App packages ([`dsh-tui-demo`](../tui-demo/README.md), [`dsh-acp-demo`](../acp-demo/README.md)) own those choices. `timer` is in the spine because it is common and stdout-silent; front doors own stdout and remain outside.
 
 This is the [interface/implementation/consumer seam](../../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md) raised to the composition level: the bundle owns the shared spine, the leaf owns the backends, the app package owns the front door.
 
@@ -63,7 +63,7 @@ For example, `{ invariants: { enabled: true, package_allowlist: ['^@deepseek-ai/
 
 ## Why a code bundle, not a shared YAML include
 
-A YAML include can deduplicate config but cannot own a bin or provide front-door defaults. App packages make stdout-safe ACP wiring the default, though a leaf can still add an unsafe logger. Bundle children register services in the root isolate-keyed store, so injected leaf siblings see them without load-order coupling.
+A YAML include can deduplicate config but cannot own a bin or provide front-door defaults. The ACP app package makes protocol-pure stdout wiring the default, though a leaf can still add an unsafe logger. Bundle children register services in the root isolate-keyed store, so injected leaf siblings see them without load-order coupling.
 
 The bounded retry policy may repeat a transiently failed request in a new numbered step. Retry status and failed partial chunks stay outside model history, each provider attempt can still incur billing, front doors derive usage across every logged step, and the reconstructed request preserves the prior prefix for provider cache reuse.
 
diff --git a/packages/fs/tool-fs/src/diff.ts b/packages/fs/tool-fs/src/diff.ts
index cf5b808662..48766a9fbc 100644
--- a/packages/fs/tool-fs/src/diff.ts
+++ b/packages/fs/tool-fs/src/diff.ts
@@ -7,7 +7,7 @@
 import { structuredPatch } from 'diff'
 import type { FileDiff } from '@deepseek-ai/dsh-tools'
 
-/** Context lines shown on each side of an applied hunk (matches claude-agent-acp). */
+/** Context lines shown on each side of an applied hunk. */
 export const DIFF_CONTEXT = 3
 
 /**
@@ -15,8 +15,7 @@ export const DIFF_CONTEXT = 3
  * contextual-diff hunks. Attached opaquely (as `unknown`) on the tool result and
  * persisted with the session log — it must be JSON-serializable (the session
  * validates this at `append`), so `presentResult` reproduces the diff card on
- * replay. The producing tool owns this shape; the bridge only sees the opaque
- * `meta` and the tool narrows it back via {@link diffsFromMeta}.
+ * replay. The producing tool owns and narrows this opaque shape.
  */
 export type FsDiffMeta = { diffs: FileDiff[] }
 
diff --git a/packages/fs/tool-fs/src/session-cwd.ts b/packages/fs/tool-fs/src/session-cwd.ts
index 841769fb4d..396e50351c 100644
--- a/packages/fs/tool-fs/src/session-cwd.ts
+++ b/packages/fs/tool-fs/src/session-cwd.ts
@@ -1,6 +1,6 @@
 /**
  * Derive the working directory a filesystem tool resolves relative paths against: the calling
- * agent's per-session workspace (`exec.agent.session.header.cwd`), so each ACP session's
+ * agent's per-session workspace (`exec.agent.session.header.cwd`), so each session's
  * `read`/`write`/`edit` act on ITS workspace, not the server's launch dir — mirroring how
  * `dsh-tool-bash` defaults a bash `workdir` to the session cwd.
  * Non-agent calls return `undefined`, leaving the fallback in the provider rather than reading
diff --git a/packages/fs/tool-fs/src/write.ts b/packages/fs/tool-fs/src/write.ts
index ba96dbe40c..37a6d67e59 100644
--- a/packages/fs/tool-fs/src/write.ts
+++ b/packages/fs/tool-fs/src/write.ts
@@ -125,9 +125,8 @@ export function applyWriteTool(ctx: Context, sandbox: FsSandboxSurface): void {
         after: outcome.after,
       }
     },
-    // Pure display: a diff card (an editor renders write as a new-file / full- replace diff).
-    // `oldText: null` — a call-time presenter has no access to the file's prior content, so
-    // even an overwrite renders new-file style, matching claude-agent-acp.
+    // Pure display: a diff card. A call-time presenter has no access to prior
+    // file content, so `oldText: null` also represents an overwrite here.
     presentCall(args): DiffCallView {
       return {
         card: 'diff',
@@ -136,10 +135,9 @@ export function applyWriteTool(ctx: Context, sandbox: FsSandboxSurface): void {
         locations: [{ path: args.file_path }],
       }
     },
-    // Result-time display: a `diff` card so the completed `tool_call_update` re-installs the
-    // diff rather than the model-facing result text (an ACP `tool_call_update.content` REPLACES
-    // the call's content, so a text result would clobber the pending diff card). Overwrites use
-    // applied metadata; creates and identical overwrites use the replay-safe args fallback.
+    // Result-time display repeats the diff because completed views replace the
+    // pending view. Overwrites use applied metadata; creates and identical
+    // overwrites use the replay-safe args fallback.
     presentResult(args, result: ToolResult): DiffResultView | undefined {
       if (result.isError) return undefined
       const diffs = diffsFromMeta(result.meta)
diff --git a/packages/fs/tool-fs/tests/diff.spec.ts b/packages/fs/tool-fs/tests/diff.spec.ts
index 21f977f0fa..d682bf40b9 100644
--- a/packages/fs/tool-fs/tests/diff.spec.ts
+++ b/packages/fs/tool-fs/tests/diff.spec.ts
@@ -2,7 +2,7 @@
  * Unit tests for the result-time contextual-diff computation (`src/diff.ts`):
  * the pure before/after → {@link FileDiff}[] hunk builder and the defensive
  * `meta` narrowing. These pin the exact hunk reconstruction (context lines,
- * multi-hunk replaceAll, pure insertion/deletion, no-op) the ACP bridge renders.
+ * multi-hunk replaceAll, pure insertion/deletion, no-op) that UIs render.
  */
 
 import { describe, expect, it } from 'vitest'
diff --git a/packages/fs/tool-fs/tests/integration.spec.ts b/packages/fs/tool-fs/tests/integration.spec.ts
index e911b9addc..c835baebb9 100644
--- a/packages/fs/tool-fs/tests/integration.spec.ts
+++ b/packages/fs/tool-fs/tests/integration.spec.ts
@@ -284,8 +284,8 @@ describe('bare provider (no dsh-fs-policy)', () => {
 })
 
 // Per-session cwd: a relative file_path resolves against the calling session's workspace
-// (`exec.agent.session.header.cwd`), not the backend's config.cwd — so an ACP editor's
-// per-session dir wins, matching dsh-tool-bash.
+// (`exec.agent.session.header.cwd`), not the backend's config.cwd, so the
+// caller-selected session workspace wins, matching dsh-tool-bash.
 describe('per-session cwd', () => {
   let sessionDir: string
   beforeEach(async () => {
diff --git a/packages/fs/tool-fs/tests/tools.spec.ts b/packages/fs/tool-fs/tests/tools.spec.ts
index bc193cc23a..ef2365f2a2 100644
--- a/packages/fs/tool-fs/tests/tools.spec.ts
+++ b/packages/fs/tool-fs/tests/tools.spec.ts
@@ -425,8 +425,8 @@ describe('edit tool', () => {
 })
 
 describe('tool-owned presentation (pure presentCall)', () => {
-  // presentCall is a pure display function of args (no I/O); it drives the ACP
-  // card's title/kind and the `locations` an editor follows along to.
+  // presentCall is a pure display function of args (no I/O); it drives the
+  // card's title/kind and the `locations` a UI follows along to.
   const presentCall = async (name: string, args: unknown) => {
     const { ctx } = await setup()
     return ctx.tools.get(name)?.presentCall?.(args)
@@ -478,7 +478,7 @@ describe('tool-owned presentation (pure presentCall)', () => {
 
 describe('result-time contextual diff (meta + presentResult)', () => {
   // An edit records the applied contextual hunk on `tool/result` meta, and the tool's
-  // presentResult narrows it back into a `diff` result card the bridge renders.
+  // presentResult narrows it back into a replayable `diff` result card.
   const withContext = 'a\nb\nc\nOLD\nd\ne\nf\n'
 
   it('edit: execute attaches the applied hunk as meta { diffs }', async () => {
@@ -519,9 +519,8 @@ describe('result-time contextual diff (meta + presentResult)', () => {
   })
 
   it('write CREATE: an empty applied-diff projection still falls back to the whole-file diff card', async () => {
-    // A create has no prior content, yet the completed card must be a `diff` — an
-    // ACP tool_call_update.content REPLACES the call's content, so a non-diff result would
-    // clobber the pending new-file diff.
+    // A create has no prior content, yet the completed replacement view must
+    // remain a diff instead of clobbering the pending new-file diff with text.
     const { ctx } = await setup()
     const session = { header: {} }
     const result = await call(ctx, 'write', { file_path: 'new.txt', content: 'fresh\n' }, { session })
diff --git a/packages/goal/command-goal/README.md b/packages/goal/command-goal/README.md
index d47e5df1e4..2bf52eb5f2 100644
--- a/packages/goal/command-goal/README.md
+++ b/packages/goal/command-goal/README.md
@@ -1,6 +1,6 @@
 # @deepseek-ai/dsh-command-goal
 
-Human-facing `/goal` control over [`ctx.goals`](../goal/README.md). The plugin registers one global command through [`ctx.commands`](../../ui/commands/README.md), so every composed command adapter discovers it; the shipped TUI and ACP execute it without a model turn. The [human goal-command Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-human-goal-command.md) owns the UX and composition decisions.
+Human-facing `/goal` control over [`ctx.goals`](../goal/README.md). The plugin registers one global command through [`ctx.commands`](../../ui/commands/README.md), so every composed command adapter discovers it; the shipped TUI executes it without a model turn. The [human goal-command Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-human-goal-command.md) owns the UX and composition decisions.
 
 ## Command contract
 
@@ -30,7 +30,7 @@ The producer injects `commands` and `goals`. A custom app mounts their owners pl
   name: '@deepseek-ai/dsh-command-goal'
 ```
 
-The TUI and ACP demo apps enable the complete persisted-goal stack and this command by default; `goals: false` removes both. The UI-less `agent-spine-demo` requires an explicit `goals: {}` so headless one-shot callers do not silently change from one physical turn to a multi-round operation.
+The TUI app enables the complete persisted-goal stack and this command by default. The ACP automation app enables the domain and model tools without mounting the command registry; `goals: false` removes that stack. The UI-less `agent-spine-demo` requires an explicit `goals: {}` so headless one-shot callers do not silently change from one physical turn to a multi-round operation.
 
 ## Model Experience
 
@@ -50,7 +50,7 @@ Command discovery and direct output do not affect the cache. A mutation appends
 
 ## Known Limitations and Deferred Work
 
-- **Plain-text interaction only** — the generic command registry has no modal edit form or replacement-confirmation callback; inline edit and explicit clear keep destructive intent deterministic on both TUI and ACP.
+- **Plain-text interaction only** — the generic command registry has no modal edit form or replacement-confirmation callback; inline edit and explicit clear keep destructive intent deterministic across adapters.
 - **No per-command round-cap argument** — `defaultMaxGoalRounds` remains deployment config, while a direct human request may ask the model to edit `max_goal_rounds` through the separately authorized goal tool.
 - **No continuous status widget** — bare `/goal` is the portable observation surface; adapter-specific badges and reconnectable command output remain future UI work.
-- **TUI and ACP only** — the headless CLI and JSON-RPC adapters do not consume `ctx.commands`. Ordinary human prompts can still authorize the model-facing goal tools when those are composed.
+- **TUI only in the shipped apps** — the headless CLI, ACP automation, and JSON-RPC adapters do not consume `ctx.commands`. Ordinary prompts can still authorize model-facing goal tools when those are composed.
diff --git a/packages/goal/tool-goal/README.md b/packages/goal/tool-goal/README.md
index 3f286f8ec3..ccba4bebf5 100644
--- a/packages/goal/tool-goal/README.md
+++ b/packages/goal/tool-goal/README.md
@@ -8,7 +8,7 @@ The model-facing control surface for [`ctx.goals`](../goal/README.md): `get_goal
 - `create_goal(objective, max_goal_rounds?)` creates one goal from a direct top-level human turn. The model may infer long-running goal intent without an exact command phrase; non-human turns and subagents are rejected at execution.
 - `update_goal(goal_id, revision, action, objective?, max_goal_rounds?, blocked_reason?)` supports `edit`, `pause`, `resume`, `complete`, and `blocked`. Replacements belong only to `edit`; `blocked_reason` is required only for `blocked` and is persisted with the stable code `model-reported`.
 
-All calls are exclusive, so a model-ordered batch observes earlier mutations and their new revisions. ACP and other clients receive pure generic cards: read for `get_goal`, other for mutations.
+All calls are exclusive, so a model-ordered batch observes earlier mutations and their new revisions. UI clients receive pure generic cards: read for `get_goal`, other for mutations.
 
 All three canonical values match the compact JSON already rendered to Native callers: `{ goal: null }` or `{ goal: { id, revision, objective, phase, roundsStarted, maxGoalRounds, blockedReason? }, activation }`. Programmatic consumers therefore receive the same domain structure without parsing the rendered JSON.
 
diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts
index 3595d9445c..24c72ce273 100644
--- a/packages/hooks/hooks-claude/src/index.ts
+++ b/packages/hooks/hooks-claude/src/index.ts
@@ -137,7 +137,7 @@ export function apply(ctx: Context, config: Config): void {
     const groups: MatcherGroup[] = parsed[point] ?? []
     const outputs: HookOutput[] = []
     // Run the hook in the agent's session workspace (the `session/new` cwd on the session
-    // header), not the executor default (the ACP server's launch dir).
+    // header), not the executor or front-door process's launch dir.
     const workdir = opts.agent?.session.header.cwd
     // CLAUDE_PROJECT_DIR: an explicit config value wins; otherwise default it to the session
     // workspace (the same dir the hook runs in).
diff --git a/packages/host/runtime/src/start.ts b/packages/host/runtime/src/start.ts
index 94e5f22da1..1a48517d4a 100644
--- a/packages/host/runtime/src/start.ts
+++ b/packages/host/runtime/src/start.ts
@@ -2,8 +2,7 @@
  * One-step host startup seam: boot core → assemble ApiProxy → assemble the
  * fetch handler. The returned RunningHost is shell-agnostic — node:http
  * (dsh web), in-process injection (dsh -p, tests), an IPC bridge (future
- * Electron sidecar), and front-door plugin mounting (future dsh acp) all
- * consume the same shape.
+ * Electron sidecar), and automation transports all consume the same shape.
  */
 
 import type { Context } from 'cordis'
@@ -33,8 +32,7 @@ export interface RunningHost {
   defaults: HostDefaults
   /**
    * Root context — a formal seam, not an escape hatch: (1) the mount point for
-   * protocol front-door plugins (`dsh acp` = startHost() → ctx.plugin(uiAcp, config));
-   * (2) headless session-event subscription. Discipline: consuming clients must
+   * automation transports; (2) headless session-event subscription. Discipline: consuming clients must
    * not bypass `api` through ctx; shells must not ctx.plugin to alter the
    * assembly (mounting a front door is the shell's own shape, not an assembly change).
    */
diff --git a/packages/llm/llm-deepseek/README.md b/packages/llm/llm-deepseek/README.md
index f245c0ef54..220a47bd6f 100644
--- a/packages/llm/llm-deepseek/README.md
+++ b/packages/llm/llm-deepseek/README.md
@@ -26,7 +26,7 @@ The package root exposes the Cordis plugin contract and `DeepSeekAdapter`; wire
         contextWindow: 64000
 ```
 
-The plugin registers the single provider route `deepseek`. A request selects it with `provider: deepseek`; its `model` is passed through as the wire `model` string, so changing DeepSeek models does not require lifecycle-time registration. Omitting `models` advertises `deepseek-v4-flash` and `deepseek-v4-pro`, each with a 128,000-token context window; an explicit list replaces those defaults, while `models: []` advertises none. Catalog entries are exposed through `ctx.llm.listModels('deepseek')` for clients such as ACP editors, but remain advisory: unlisted model ids still pass through unchanged. An omitted entry name defaults to its id.
+The plugin registers the single provider route `deepseek`. A request selects it with `provider: deepseek`; its `model` is passed through as the wire `model` string, so changing DeepSeek models does not require lifecycle-time registration. Omitting `models` advertises `deepseek-v4-flash` and `deepseek-v4-pro`, each with a 128,000-token context window; an explicit list replaces those defaults, while `models: []` advertises none. Catalog entries are exposed through `ctx.llm.listModels('deepseek')` for UI selectors and deployment introspection, but remain advisory: unlisted model ids still pass through unchanged. An omitted entry name defaults to its id.
 
 `contextWindow` is optional per configured model and is not exposed through the advisory catalog. `ctx.llm.resolveModelContext('deepseek', model)` returns it only for an exact configured id; omission or an unlisted pass-through model returns `undefined` without invalidating routing. Pressure-sensitive plugins therefore get deployment-owned capacity without treating the model selector as authoritative. Registering another adapter for `deepseek` throws `LlmError('DUPLICATE_ADAPTER')`.
 
diff --git a/packages/lsp/tool-lsp/README.md b/packages/lsp/tool-lsp/README.md
index e2f15ba79a..e1817a0ff7 100644
--- a/packages/lsp/tool-lsp/README.md
+++ b/packages/lsp/tool-lsp/README.md
@@ -1,6 +1,6 @@
 # @deepseek-ai/dsh-tool-lsp
 
-The model-facing **`lsp` tool** over `ctx.lsp`: one read-only tool with four operations for precise code navigation. It owns the model schema, prompt guidance, coordinate conversion, result limits and formatting, and ACP presentation; it imports no provider.
+The model-facing **`lsp` tool** over `ctx.lsp`: one read-only tool with four operations for precise code navigation. It owns the model schema, prompt guidance, coordinate conversion, result limits and formatting, and UI presentation; it imports no provider.
 
 Namespace plugin (`name` / `inject` / `Config` / `apply`, no default export). Injects `tools`, `lsp`, and `systemPrompt`.
 
@@ -68,7 +68,7 @@ Capped per tool result by `maxResultChars`, with `maxLocations` additionally bou
 
 Tool results append after the cached request prefix and do not directly invalidate it.
 
-### ACP presentation
+### UI presentation
 
 #### What the model sees
 
@@ -80,7 +80,7 @@ Zero direct token effect because rendering is client-side only.
 
 #### KV Cache effect
 
-None; ACP presentation is outside the model request.
+None; UI presentation is outside the model request.
 
 ## Known Limitations and Deferred Work
 
diff --git a/packages/lsp/tool-lsp/src/render.ts b/packages/lsp/tool-lsp/src/render.ts
index b6341ae407..215dfb60e6 100644
--- a/packages/lsp/tool-lsp/src/render.ts
+++ b/packages/lsp/tool-lsp/src/render.ts
@@ -1,7 +1,7 @@
 /**
  * Pure formatting and coordinate conversion for the `lsp` tool: one-based↔zero-based UTF-16 cursor
  * conversion, workspace-grouped location rendering with `file:`-URI resolution, complete-result
- * capping, and ACP presentation. No I/O — a UI may call the presenter on live streaming and on
+ * capping, and UI presentation. No I/O — a UI may call the presenter on live streaming and on
  * replay, so it depends only on the tool arguments.
  * @module @deepseek-ai/dsh-tool-lsp/render
  */
@@ -152,9 +152,9 @@ export function renderUri(uri: string, workspaceRoot: string): string {
 }
 
 /**
- * ACP presentation for a pending `lsp` call. Uses a generic search card; the title carries the
- * operation and one-based cursor, and `locations` focuses the queried line (ACP `FileLocation` has
- * no character, so the title preserves the column).
+ * UI presentation for a pending `lsp` call. Uses a generic search card; the title carries the
+ * operation and one-based cursor, and `locations` focuses the queried line. The shared location
+ * shape has no character, so the title preserves the column.
  * @param args - the raw tool arguments.
  * @returns the generic call view.
  */
diff --git a/packages/plan/README.md b/packages/plan/README.md
index f90d16ab51..4aedb8c9aa 100644
--- a/packages/plan/README.md
+++ b/packages/plan/README.md
@@ -6,4 +6,4 @@ Plan mode is one logged, per-agent collaboration state. It is a single **product
 |---|---|---|
 | `plan-mode/` | `plan/mode` vocabulary + fold, boundary-applied state, the `plan:policy` guidance section, `/plan [message]` entry and `/plan off` exit, and the model-facing `exit_plan_mode` review tool | `ctx.planMode` |
 
-The active state is a pure function of the session log, so resume and fork restore it without extra machinery. The deployment supplies plan instructions through Cordis config, while `exit_plan_mode` stays registered when planning is inactive to keep the request tool catalog stable. ACP maps this capability onto its generic `default` / `plan` picker; sandbox mode and approval policy remain independent enforcement settings. Design: [plan-mode Agent Note](../../.agents/notes/implemented/feature/2026-07-07-plan-mode.md) and [plan-specific state simplification](../../.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.md).
+The active state is a pure function of the session log, so resume and fork restore it without extra machinery. The deployment supplies plan instructions through Cordis config, while `exit_plan_mode` stays registered when planning is inactive to keep the request tool catalog stable. Interactive adapters use the plugin-owned `/plan` command; sandbox mode and approval policy remain independent enforcement settings. Design: [plan-mode Agent Note](../../.agents/notes/implemented/feature/2026-07-07-plan-mode.md) and [plan-specific state simplification](../../.agents/notes/implemented/simplification/2026-07-22-plan-specific-collaboration-state.md).
diff --git a/packages/plan/plan-mode/README.md b/packages/plan/plan-mode/README.md
index 2725954185..a38251826d 100644
--- a/packages/plan/plan-mode/README.md
+++ b/packages/plan/plan-mode/README.md
@@ -14,7 +14,7 @@ While active, `plan:policy` renders the configured `section`. The plugin always
 
 When `ctx.commands` is composed, the package registers `/plan [message]` and reserves the exact argument `off` for direct exit. Bare `/plan` selects plan mode; any other non-empty argument selects it first and is then submitted through `agent.steer()`, so it becomes the next step's ordinary logged user message under plan guidance. `/plan off` selects inactive without sending model input; it also cancels a pending entry before plan mode reaches a request.
 
-ACP is an adapter, not the owner of this vocabulary: it advertises the fixed wire ids `default` and `plan`, maps `session/set_mode` to the boolean service, and translates committed `plan/mode` events back to `current_mode_update`.
+The TUI consumes the plugin-owned `/plan` command; other front doors may drive the same service directly without defining a second mode vocabulary.
 
 ## Configuration
 
diff --git a/packages/plan/plan-mode/tests/integration.spec.ts b/packages/plan/plan-mode/tests/integration.spec.ts
index 940b78870a..0193634191 100644
--- a/packages/plan/plan-mode/tests/integration.spec.ts
+++ b/packages/plan/plan-mode/tests/integration.spec.ts
@@ -71,8 +71,8 @@ describe('plan mode through the agent loop', () => {
     ])
     const ctx = await harness(adapter)
     const agent = ctx.agentLoop.create(SessionId('it-plan-seed'), { provider: 'mock', model: 'mock' })
-    // Selected while idle (the ACP picker shape): the pending intent flushes at
-    // the first prompt-submit, BEFORE the first assembly.
+    // Selected while idle: the pending intent flushes at the first
+    // prompt-submit, BEFORE the first assembly.
     ctx.planMode.set(agent, true)
 
     agent.send([{ type: 'text', text: 'explore the repo' }])
diff --git a/packages/pty/tool-pty/README.md b/packages/pty/tool-pty/README.md
index 3f9733496a..f4f1e7af7e 100644
--- a/packages/pty/tool-pty/README.md
+++ b/packages/pty/tool-pty/README.md
@@ -2,7 +2,7 @@
 
 Six model-facing tools over `ctx.pty`: `terminal_open`, `terminal_send`, `terminal_read`, `terminal_signal`, `terminal_close`, and `terminal_list`. Every operation requires the exact initiating `Agent`, so a model cannot address another agent's terminal even if it learns the id.
 
-`terminal_send(run_in_background: true)` reuses `ctx.tasks`; task preflight and the PTY service's exclusive per-session send reservation occur before the task id is returned, completion is collected with `task_output`, and `task_kill` delivers `SIGINT` to the foreground process group. Foreground sends use terminal ACP call/result cards. Background sends use a generic execute card; open, read, signal, close, and list use generic `execute`, `read`, `execute`, `delete`, and `read` cards respectively. None declares source locations.
+`terminal_send(run_in_background: true)` reuses `ctx.tasks`; task preflight and the PTY service's exclusive per-session send reservation occur before the task id is returned, completion is collected with `task_output`, and `task_kill` delivers `SIGINT` to the foreground process group. Foreground sends use terminal call/result cards. Background sends use a generic execute card; open, read, signal, close, and list use generic `execute`, `read`, `execute`, `delete`, and `read` cards respectively. None declares source locations.
 
 ## Config
 
diff --git a/packages/pty/tool-pty/src/render.ts b/packages/pty/tool-pty/src/render.ts
index 361de1eab5..6fe8a1880f 100644
--- a/packages/pty/tool-pty/src/render.ts
+++ b/packages/pty/tool-pty/src/render.ts
@@ -1,4 +1,4 @@
-/** Model and ACP rendering for persistent terminal tool results. */
+/** Model and UI rendering for persistent terminal tool results. */
 
 import { TextRetainer } from '@deepseek-ai/dsh-retention'
 
diff --git a/packages/sandbox/sandbox-policy/README.md b/packages/sandbox/sandbox-policy/README.md
index 783b338acf..bb43a555d6 100644
--- a/packages/sandbox/sandbox-policy/README.md
+++ b/packages/sandbox/sandbox-policy/README.md
@@ -23,7 +23,7 @@ The optional `./invariant` companion rejects a forged durable `sandbox/mode` eve
 
 ## The per-session store
 
-A runtime switch (an ACP `session/set_config_option`, a test scenario) is one log-only `sandbox/mode` event on the session it applies to. `effective = explicit grant ?? fold(events) ?? deployment default`, so an override survives restart by replay and two sessions never see each other's state. Workspace identity does not need another event: the immutable `SessionHeader.cwd` recorded at creation is the root for every call in that session. The event is log-only (the `approval/*` precedent): the model learns the mode from the enforcing tools' denial markers, never from the event.
+A runtime switch is one log-only `sandbox/mode` event on the session it applies to. `effective = explicit grant ?? fold(events) ?? deployment default`, so an override survives restart by replay and two sessions never see each other's state. Workspace identity does not need another event: the immutable `SessionHeader.cwd` recorded at creation is the root for every call in that session. The event is log-only (the `approval/*` precedent): the model learns the mode from the enforcing tools' denial markers, never from the event.
 
 ## Model Experience
 
diff --git a/packages/sandbox/sandbox-policy/src/session-mode.ts b/packages/sandbox/sandbox-policy/src/session-mode.ts
index ad7fe0ef29..a97532b29b 100644
--- a/packages/sandbox/sandbox-policy/src/session-mode.ts
+++ b/packages/sandbox/sandbox-policy/src/session-mode.ts
@@ -1,7 +1,7 @@
 /**
  * Per-session sandbox-mode override: the session log as the store. A runtime
- * switch (an ACP `session/set_config_option`, a test scenario) is recorded as
- * one `sandbox/mode` event on the session it applies to;
+ * switch (a UI policy control or test scenario) is recorded as one
+ * `sandbox/mode` event on the session it applies to;
  * `effective = fold(events) ?? the deployment default`, so an override
  * survives restart by replay, two sessions can never see each other's state,
  * and there is no external config store. The event is log-only (the
diff --git a/packages/sdk/create-sdk/src/create-questions.ts b/packages/sdk/create-sdk/src/create-questions.ts
index 193f1fdc25..236385e45c 100644
--- a/packages/sdk/create-sdk/src/create-questions.ts
+++ b/packages/sdk/create-sdk/src/create-questions.ts
@@ -168,7 +168,7 @@ const PROJECT_QUESTION_STEPS: readonly WizardStep<ProjectAnswerState>[] = [
       id: 'interface',
       message: 'Run interface',
       options: [
-        { value: 'acp', label: 'ACP server' },
+        { value: 'acp', label: 'ACP automation server' },
         { value: 'tui', label: 'Terminal TUI' },
         { value: 'embed', label: 'Embedded context' },
       ],
diff --git a/packages/sdk/create-sdk/tests/create.snapshot.ts b/packages/sdk/create-sdk/tests/create.snapshot.ts
index 83a1f74932..941c8cbb7f 100644
--- a/packages/sdk/create-sdk/tests/create.snapshot.ts
+++ b/packages/sdk/create-sdk/tests/create.snapshot.ts
@@ -183,7 +183,7 @@ describe.skipIf(process.platform === 'win32')('create-sdk terminal contract', ()
             "kind": "select",
             "message": "Run interface",
             "options": [
-              "ACP server",
+              "ACP automation server",
               "Terminal TUI",
               "Embedded context",
             ],
@@ -287,12 +287,6 @@ describe.skipIf(process.platform === 'win32')('create-sdk terminal contract', ()
                 "label": "Tool timeout policy",
                 "required": false,
               },
-              {
-                "choices": undefined,
-                "default": false,
-                "label": "Ask the user from the model loop",
-                "required": false,
-              },
             ],
           },
           {
diff --git a/packages/sdk/helper/README.md b/packages/sdk/helper/README.md
index 89ca897d31..bfe5d31d3f 100644
--- a/packages/sdk/helper/README.md
+++ b/packages/sdk/helper/README.md
@@ -6,7 +6,7 @@ The package owns the builtin typed-spec catalog, provider/app behavior entities,
 
 All business and document validation completes before commit writes any affected file. Commit detects external edits made after the session opened, but deliberately provides no cross-file rollback after writing starts.
 
-Builtin features are provider, bash, app, persistence, HMR, filesystem, todo, skill, web, subagent, workflow, compaction, hooks, repeat-tool guard, timeout policy, and ask-user. The catalog owns feature options, required and non-default Cordis plugin config, feature requirements, resource contribution, and round-trip markers; create and config use the same registry and configurator. The ACP app option contributes the human-command and user-interaction services before the bridge.
+Builtin features are provider, bash, app, persistence, HMR, filesystem, todo, skill, web, subagent, workflow, compaction, hooks, repeat-tool guard, timeout policy, and ask-user. The catalog owns feature options, required and non-default Cordis plugin config, feature requirements, resource contribution, and round-trip markers; create and config use the same registry and configurator. The ACP app option contributes only the automation bridge; interactive services belong to TUI or Web compositions.
 
 `SdkProject.open()` requires only readable root `package.json` and `cordis.yml`. A Cordis config entry anchors feature installation; a package present only through a linked NPM dependency closure leaves the feature absent. Once an owned Cordis config entry exists, an incomplete resource shape is `inconsistent` and cannot be modified automatically.
 
diff --git a/packages/sdk/helper/src/features/builtin/app.ts b/packages/sdk/helper/src/features/builtin/app.ts
index 835a9a8710..ed4050bf11 100644
--- a/packages/sdk/helper/src/features/builtin/app.ts
+++ b/packages/sdk/helper/src/features/builtin/app.ts
@@ -73,14 +73,6 @@ class AppOption extends FeatureOption {
       case 'acp':
         return new ProjectContribution([
           ...appProjectResources(profile, this.id),
-          ...npmCordisConfigEntry(ID, {
-            id: 'commands',
-            name: '@deepseek-ai/dsh-commands',
-          }),
-          ...npmCordisConfigEntry(ID, {
-            id: 'user-interaction',
-            name: '@deepseek-ai/dsh-user-interaction',
-          }),
           ...npmCordisConfigEntry(ID, {
             id: 'acp',
             name: '@deepseek-ai/dsh-acp',
@@ -119,7 +111,7 @@ export class AppFeature extends ExclusiveOptionFeature {
   override readonly required = true
   override readonly requires = [featureId('spine')]
   override readonly options = [
-    new AppOption('acp', 'ACP server'),
+    new AppOption('acp', 'ACP automation server'),
     new AppOption('tui', 'Terminal TUI'),
     new AppOption('embed', 'Embedded context'),
   ]
diff --git a/packages/sdk/helper/src/features/builtin/index.ts b/packages/sdk/helper/src/features/builtin/index.ts
index 29889b438e..48b50977f8 100644
--- a/packages/sdk/helper/src/features/builtin/index.ts
+++ b/packages/sdk/helper/src/features/builtin/index.ts
@@ -347,7 +347,7 @@ config:
       id: 'ask-user',
       summary: 'Ask the user from the model loop',
       mode: 'single',
-      supportedInterfaces: ['acp', 'tui'],
+      supportedInterfaces: ['tui'],
       options: [{
         id: 'default',
         label: 'ask_user_question tool',
diff --git a/packages/sdk/helper/src/templates/assets/README.md.tpl b/packages/sdk/helper/src/templates/assets/README.md.tpl
index bdaef06c4e..c9843a2d15 100644
--- a/packages/sdk/helper/src/templates/assets/README.md.tpl
+++ b/packages/sdk/helper/src/templates/assets/README.md.tpl
@@ -5,9 +5,9 @@
 Built with the DeepSeek Harness SDK using the {{model}} model.
 
 {{#if isAcp}}
-## Run as an ACP server
+## Run as an ACP automation server
 
-Run `{{packageManager}} start` and configure your ACP client to launch this project. Standard output is reserved for ACP JSON-RPC.
+Run `{{packageManager}} start` and configure a programmatic ACP client to launch this project. Standard output is reserved for ACP JSON-RPC.
 {{else}}
 {{#if isTui}}
 ## Run in a terminal
diff --git a/packages/sdk/helper/tests/project.spec.ts b/packages/sdk/helper/tests/project.spec.ts
index bc3e5ebe12..f1216d2768 100644
--- a/packages/sdk/helper/tests/project.spec.ts
+++ b/packages/sdk/helper/tests/project.spec.ts
@@ -289,12 +289,13 @@ describe('SdkProject and ProjectEditSession', () => {
     edit.configureFeature(registry.get(featureId('app')), selection('app', ['acp']))
     const acp = (await edit.commit()).project
     expect(acp.profile.runInterface).toBe('acp')
-    expect(acp.cordis.entry('commands')).toMatchObject({ name: '@deepseek-ai/dsh-commands' })
+    expect(acp.cordis.entry('commands')).toBeUndefined()
+    expect(acp.cordis.entry('user-interaction')).toBeUndefined()
     expect(acp.packageManifest().scripts).toMatchObject({
       dev: 'dsh-sdk dev index.ts',
       start: 'dsh-sdk start index.js',
     })
-    expect(await readFile(join(acp.root, 'README.md'), 'utf8')).toContain('Run as an ACP server')
+    expect(await readFile(join(acp.root, 'README.md'), 'utf8')).toContain('Run as an ACP automation server')
     expect(await readFile(join(acp.root, 'index.ts'), 'utf8')).not.toContain('agents.create')
 
     const acpRegistry = createBuiltinRegistry(acp.profile)
@@ -324,12 +325,16 @@ describe('SdkProject and ProjectEditSession', () => {
       .toContain('missing package.json script dev')
   })
 
-  it('rejects enabled features that do not apply to the target app interface', async () => {
+  it('rejects ask-user on non-interactive app interfaces', async () => {
     const project = await createCommitted([selection('ask-user', ['default'])])
     const registry = createBuiltinRegistry(project.profile)
-    const edit = project.edit(registry)
-    edit.configureFeature(registry.get(featureId('app')), selection('app', ['embed']))
-    await expect(edit.commit()).rejects.toThrow('feature ask-user is not available for embed')
+    const embed = project.edit(registry)
+    embed.configureFeature(registry.get(featureId('app')), selection('app', ['embed']))
+    await expect(embed.commit()).rejects.toThrow('feature ask-user is not available for embed')
+
+    const acp = project.edit(registry)
+    acp.configureFeature(registry.get(featureId('app')), selection('app', ['acp']))
+    await expect(acp.commit()).rejects.toThrow('feature ask-user is not available for acp')
   })
 
   it('supports disabled feature reconfiguration and rejects invalid state operations', async () => {
diff --git a/packages/sdk/scripts/tests/__snapshots__/config.snapshot.ts.snap b/packages/sdk/scripts/tests/__snapshots__/config.snapshot.ts.snap
index 14f74b0f85..f3d6867225 100644
--- a/packages/sdk/scripts/tests/__snapshots__/config.snapshot.ts.snap
+++ b/packages/sdk/scripts/tests/__snapshots__/config.snapshot.ts.snap
@@ -85,7 +85,7 @@ Change file: package.json
           "choices": [
             {
               "default": false,
-              "label": "ACP server",
+              "label": "ACP automation server",
               "value": "acp",
             },
             {
diff --git a/packages/sdk/scripts/tests/scripts.spec.ts b/packages/sdk/scripts/tests/scripts.spec.ts
index fa8eb00d41..74c450025f 100644
--- a/packages/sdk/scripts/tests/scripts.spec.ts
+++ b/packages/sdk/scripts/tests/scripts.spec.ts
@@ -542,23 +542,23 @@ describe('ConfigWorkflow', () => {
     expect(result.commit?.project.cordis.entry('agent-core')).toBeUndefined()
   })
 
-  it('disables ask-user when switching its app interface to embed', async () => {
+  it('disables ask-user when switching its app interface to ACP', async () => {
     const project = await committedProject([
       { id: featureId('ask-user'), options: ['default'] },
-    ], [], 'acp')
+    ], [], 'tui')
     const registry = createBuiltinRegistry(project.profile)
     const output = outputBuffer()
     const workflow = new ConfigWorkflow(new QueuePort([
       [
         { value: 'feature:provider', choices: ['deepseek'] },
-        { value: 'feature:app', choices: ['embed'] },
+        { value: 'feature:app', choices: ['acp'] },
         { value: 'feature:persistence', choices: ['jsonl'] },
         { value: 'feature:ask-user', choices: ['default'] },
       ],
       true,
     ]), output.stream, async () => {})
     const result = await workflow.run(project, registry)
-    expect(result.commit?.project.profile.runInterface).toBe('embed')
+    expect(result.commit?.project.profile.runInterface).toBe('acp')
     expect(result.commit?.project.cordis.entry('tool-ask-user')?.disabled).toBe(true)
     expect(output.read()).toContain('Disable feature: ask-user')
   })
diff --git a/packages/subagent/subagent-acp/README.md b/packages/subagent/subagent-acp/README.md
index 59f4c4787b..45d9abe2b8 100644
--- a/packages/subagent/subagent-acp/README.md
+++ b/packages/subagent/subagent-acp/README.md
@@ -96,6 +96,6 @@ Append-only; newly visible content follows the reusable request prefix and does
 - **A fresh process per run** — persistent-process pooling is a future optimization ([the seam Agent Note](../../../.agents/notes/implemented/feature/2026-06-21-subagent-capability-seam.md)).
 - **Local workspaces only** — the resolved cwd is a local path handed to a child on the same machine; workspace mapping for a remote ACP agent would need its own backend capability and is not designed here.
 - **No optional start-time capabilities** — this provider cannot apply the local harness's `outputSchema`, depth cap, tool filter, or persona inside the remote process, so it advertises none and the service rejects requests that require them.
-- **Only `agent_message_chunk` text is collected** — the child's tool-call activity, thought chunks, and plan updates are not surfaced to the parent.
+- **Only committed `agent_message_chunk` text is collected** — the automation server keeps reasoning, tool activity, plans, and other trace data in the child session log rather than emitting them on ACP.
 - **Permission prompts are auto-answered** (`permission: allow | reject`) — no human is surfaced a child's `session/request_permission` in this cut.
 - **No snapshot-tier replay coverage** (`TODO(acp-subagent-replay)`) — an ACP child is its own process with its own replay shape, deferred.
diff --git a/packages/support/acp-snapshot/README.md b/packages/support/acp-snapshot/README.md
index 05a4974c19..1a19d1715e 100644
--- a/packages/support/acp-snapshot/README.md
+++ b/packages/support/acp-snapshot/README.md
@@ -6,7 +6,7 @@ Four layers, importable separately:
 
 - **`launchAcpTestAgent` (launcher)** — boots a source agent under tsx or a built `lib` agent under plain Node from a supplied cwd, connects the SDK client over a raw-byte stdout tee, collects session updates and stderr, surfaces asynchronous spawn failures through startup, fails closed on unhandled permission requests, and owns graceful or signalled shutdown. Shutdown waits for process exit, inherited stdio closure, and ACP parser exhaustion before resolving or propagating a child error, so captures are complete and callers can remove owned paths after either outcome. When Windows accepts forced termination but publishes its exit marker asynchronously, shutdown gives that marker a bounded grace before treating fallback refusal as a second failure. Snapshot and ordinary e2e suites share this process boundary; a test supplies only agent paths, cwd, environment overrides, and any permission policy.
 - **`runScenario` (harness)** — drives ACP JSON-RPC stdio from a deterministic `input.json` script through the launcher, tees raw stdout for the expected-output and purity checks, and harvests every persisted raw JSONL session log (parent and subagent children, primary-first) after graceful stdin EOF. `AgentUnderTest` supplies absolute `binScript`, optional `libBinScript`, `configPath`, and `tsconfigPath` paths because the subprocess cwd is outside the repo; `workspaceParent` may move the generated child cwd from the platform temp directory when that grant is itself under test. Startup failures preserve captured agent stderr in the rejected diagnostic.
-- **Normalizers** — pure functions turning the two captured surfaces into stable text: `normalizeStdout` (JSON-RPC ids → first-seen sequence; UUIDs/cwd → tokens; cwd-rooted separators selected as canonical `/` or host-native; `session_info_update.updatedAt` → `{{updatedAt}}`; doubles as the stdout-purity check), `normalizeSessionLog` (times zeroed, `seq` kept, the same cwd-path policy), `scrubSystemPrompts` (prompt text → `{{system}}`), `scrubToolSchemas` (schema bulk → `{{tools}}`), and `scrubRequestHeaders` (all header bulk → `{{system}}`/`{{tools}}`/`{{messagePrefix}}` outside each pin, structure kept — [pinned-header Agent Note](../../../.agents/notes/implemented/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)).
+- **Normalizers** — pure functions turning the two captured surfaces into stable text: `normalizeStdout` (JSON-RPC ids → first-seen sequence; UUIDs/cwd → tokens; cwd-rooted separators selected as canonical `/` or host-native; doubles as the stdout-purity check), `normalizeSessionLog` (times zeroed, `seq` kept, the same cwd-path policy), `scrubSystemPrompts` (prompt text → `{{system}}`), `scrubToolSchemas` (schema bulk → `{{tools}}`), and `scrubRequestHeaders` (all header bulk → `{{system}}`/`{{tools}}`/`{{messagePrefix}}` outside each pin, structure kept — [pinned-header Agent Note](../../../.agents/notes/implemented/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)).
 - **`defineAcpSnapshotSuite` (factory)** — registers the whole describe/it tree for a scenario table: per-scenario expected-output and re-persisted-log comparisons, record/refresh fixture write-back, rejection of structured `UNKNOWN_TOOL` results, the per-header-class pin (`system-prompt.expected.md` plus `tool-schemas.expected.json`) with its live uniformity guard, and the fixture guard block (no orphan scenario dirs, required files present, exactly one pin per class, every JSONL prompt/schema-scrubbed, non-pinning fixtures fully header-scrubbed). Refresh expands packed timing envelopes before aligning existing volatile event times, so switching between packed and unpacked layouts cannot shift later records; fresh chunk-fragment arrays remain authoritative. A newly inserted `session/title` receives its preceding event's time so feature-driven insertions do not churn the remainder of a fixture. Each scenario directory's `session.jsonl` plus contiguous `session.<n>.jsonl` siblings are the ordered primary/child inventory; the scenario table does not duplicate their count. Must be called at vitest collection time.
 
 A consuming `*.snapshot.ts` is the scenario table plus one factory call:
@@ -14,7 +14,22 @@ A consuming `*.snapshot.ts` is the scenario table plus one factory call:
 ```ts
 import { dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
-import { defineAcpSnapshotSuite, type Scenario } from '@deepseek-ai/dsh-acp-snapshot'
+import {
+  defineAcpSnapshotSuite,
+  type Scenario,
+  type SnapshotSuiteOptions,
+} from '@deepseek-ai/dsh-acp-snapshot'
+
+function snapshotMode(value: string | undefined): SnapshotSuiteOptions['mode'] {
+  switch (value) {
+    case undefined:
+    case '':
+    case 'replay': return 'replay'
+    case 'record': return 'record'
+    case 'refresh': return 'refresh'
+    default: throw new Error(`unknown DSH_SNAPSHOT mode: ${value}`)
+  }
+}
 
 const SCENARIOS: Scenario[] = [
   { name: 'text-turn', hasModelTurn: true, recorded: true, pinsHeader: true },
@@ -28,11 +43,7 @@ defineAcpSnapshotSuite({
   },
   snapshotsDir: join(dirname(fileURLToPath(import.meta.url)), 'snapshots'),
   scenarios: SCENARIOS, // exactly one entry per header class sets pinsHeader
-  mode: process.env.DSH_SNAPSHOT === 'record'
-    ? 'record'
-    : process.env.DSH_SNAPSHOT === 'refresh'
-      ? 'refresh'
-      : 'replay',
+  mode: snapshotMode(process.env.DSH_SNAPSHOT),
 })
 ```
 
@@ -42,7 +53,7 @@ Every scenario compares `stdout.expected.jsonl` with cwd-rooted separators canon
 
 The example also ships a `cordis.snapshot.yml` replay overlay next to its `cordis.yml` (the bin swaps them under `DSH_SNAPSHOT=replay` — [single-source replay config Agent Note](../../../.agents/notes/implemented/testing/2026-07-04-single-source-acp-replay-config.md)); replay fixtures are served by [`dsh-llm-replay`](../llm-replay/README.md), which this package points at via the `DSH_SNAPSHOT_*` env vars it sets on the child. `pnpm run test:snapshot:record` calls the live LLM and rewrites the recorded scenarios' model fixtures; `pnpm run test:snapshot:refresh` stays keyless, runs the replay overlay, and rewrites stdout, comparable session-log expected outputs, and each pin's prompt and tool-schema sidecars from the committed model scripts. Fixture roles, record/replay/refresh semantics, and scenario-table fields are documented on `Scenario` and in the [snapshot Agent Note](../../../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md).
 
-Constraints: `suite.ts` imports vitest, so the package entry is importable only inside a vitest run (the launcher, harness, and normalizers have no such dependency but ship from the same entry). ACP-specific by design — the launcher speaks the SDK's `ClientSideConnection`. Permission round-trips are scriptable: `InputScript.permissionAnswers` is a FIFO queue of option-kind selections (`allow_once`, `reject_once`, …) the client maps to the agent-issued `optionId` at answer time; an absent or exhausted queue answers `cancelled`, and a kind the request never offered rejects the run (the agent is answered `cancelled`, so a tolerant agent cannot absorb the scenario bug). Session config options are scriptable too: the `setConfigOption` step switches a knob over `session/set_config_option`, and `setConfigOptionExpectError` asserts the bridge rejects an unknown id or out-of-vocabulary value (the error frame stays in the transcript).
+Constraints: `suite.ts` imports vitest, so the package entry is importable only inside a vitest run (the launcher, harness, and normalizers have no such dependency but ship from the same entry). ACP-specific by design — the launcher speaks the SDK's `ClientSideConnection`. Input scripts cover initialization, fresh-session creation, text prompting, cancellation, expected RPC failures, and durable turn-boundary waits. Permission round-trips are a FIFO queue of option-kind selections (`allow_once`, `reject_once`, …) mapped to the agent-issued `optionId`; an absent or exhausted queue answers `cancelled`, and an unoffered kind rejects the run.
 
 ## Model Experience
 
@@ -56,3 +67,4 @@ None; this package neither assembles nor sends a provider request.
 
 - **Session harvest requires raw JSONL mode** — `runScenario` collects persisted `.jsonl` logs, so snapshot configs set `persistenceCompression: 'none'`; compressed JSONL and SQLite compositions have no snapshot-harvest path.
 - **Built mode requires current artifacts** — run `pnpm run build` before selecting `DSH_EXAMPLE_MODE=lib`; source mode remains the zero-build path.
+- **Backend coverage still rides an ACP driver** — most `examples/acp-agent` scenarios assert assembled agent behavior through the persisted log rather than ACP-specific behavior. The suite carries an explicit FIXME to migrate those scenarios to headless `stream-json`; this package remains until that coverage moves without loss.
diff --git a/packages/support/acp-snapshot/src/harness.ts b/packages/support/acp-snapshot/src/harness.ts
index 2821969457..7b139124ab 100644
--- a/packages/support/acp-snapshot/src/harness.ts
+++ b/packages/support/acp-snapshot/src/harness.ts
@@ -25,8 +25,6 @@ import { setTimeout as delay } from 'node:timers/promises'
 import {
   ClientSideConnection,
   PROTOCOL_VERSION,
-  type CreateElicitationRequest,
-  type CreateElicitationResponse,
   type RequestPermissionRequest,
   type RequestPermissionResponse,
   type SessionNotification,
@@ -44,18 +42,19 @@ const WAIT_POLL_INTERVAL_MS = 10
  * (random) session id into a `{{sessionId}}` variable that later steps
  * reference, since a committed file cannot know the id in advance.
  *
- * `promptAndCancel` starts a prompt without awaiting completion, waits until
- * the client observes the selected update (`agent_message_chunk` by default),
- * then cancels and awaits completion. An optional `waitForFile` first observes
- * a cwd-relative readiness marker, and a named `waitForToolCallUpdate` keeps
- * the step open for a terminal tool update that may follow the prompt response.
+ * `promptAndCancel` starts a prompt without awaiting completion, waits for a
+ * readiness condition, then cancels and awaits completion. `waitForFile`
+ * observes a cwd-relative marker; the default observes the durable turn start.
  * `promptAndWaitForAgentMessage` arms an exact text-chunk waiter before sending
  * the prompt, then keeps the application live until that later update arrives.
- * `waitForTurnEnd` holds the subprocess open until the selected session's latest
- * complete raw-JSONL turn boundary is `turn/end`; its timeout defaults to 10s.
+ * `waitForTurnStart` waits for an open durable turn, optionally at or beyond a
+ * specified turn number. `waitForTurnEnd` holds the subprocess open until the
+ * selected session's latest complete raw-JSONL turn boundary is `turn/end`.
+ * A standalone `cancel` may also wait for a cwd-relative readiness marker.
+ * All wait timeouts default to 10s.
  */
 export type InputStep =
-  | { op: 'initialize'; terminalOutput?: boolean }
+  | { op: 'initialize' }
   | { op: 'newSession' }
   | { op: 'newSessionExpectError'; additionalDirectories?: string[] }
   | { op: 'prompt'; text: string }
@@ -64,16 +63,11 @@ export type InputStep =
   | {
     op: 'promptAndCancel'
     text: string
-    afterUpdate?: 'agent_message_chunk' | 'tool_call'
     waitForFile?: { path: string; timeoutMs?: number }
-    waitForToolCallUpdate?: string
   }
+  | { op: 'waitForTurnStart'; minimumTurn?: number; timeoutMs?: number }
   | { op: 'waitForTurnEnd'; timeoutMs?: number }
-  | { op: 'cancel' }
-  | { op: 'setMode'; modeId: string }
-  | { op: 'setModeExpectError'; modeId: string }
-  | { op: 'setConfigOption'; configId: string; value: string }
-  | { op: 'setConfigOptionExpectError'; configId: string; value: string }
+  | { op: 'cancel'; waitForFile?: { path: string; timeoutMs?: number } }
 
 /** A scenario's `input.json`: an ordered list of input steps. */
 export interface InputScript {
@@ -86,21 +80,11 @@ export interface InputScript {
    * kind → the offered `optionId` at answer time. A request beyond the queue
    * (or with no queue at all) is answered `cancelled` — the stub behavior a
    * scenario without approvals relies on. A scripted kind the request does
-   * not offer REJECTS the run: the scenario scripted an impossible click,
+   * not offer REJECTS the run: the scenario scripted an impossible selection,
    * and {@link runScenario} throws once the in-flight step settles (the
    * agent itself just sees `cancelled`, so it cannot absorb the bug).
    */
   permissionAnswers?: PermissionAnswer[]
-  /**
-   * Ordered answers for the agent's `elicitation/create` round-trips (the
-   * ask_user_question / plan-review forms), consumed FIFO — the Nth request
-   * gets the Nth answer. Exhaustion (or no queue) answers `cancel`, the same
-   * fail-closed stub an elicitation-free scenario relies on. Unlike permission
-   * kinds, the scripted strings are not validated against the offered form —
-   * a stray `choice` reaches the agent verbatim, which reads it as a custom
-   * (non-consenting) answer, so a scenario bug fails safe in the transcript.
-   */
-  elicitationAnswers?: ElicitationAnswer[]
 }
 
 /** One scripted answer to a permission request: which offered option kind to select. */
@@ -109,16 +93,6 @@ export interface PermissionAnswer {
   kind: 'allow_once' | 'allow_always' | 'reject_once' | 'reject_always'
 }
 
-/** One scripted answer to an elicitation form (accept with choice/custom content, or cancel). */
-export interface ElicitationAnswer {
-  /** Accept the form with the content below, or cancel it. */
-  action: 'accept' | 'cancel'
-  /** The selected option label (the form's `choice` field). */
-  choice?: string
-  /** Free-form text (the form's `custom` field). */
-  custom?: string
-}
-
 /** One harvested session log plus the identifying facts off its header line. */
 export interface HarvestedLog {
   /** The recorded session id (header `id`). */
@@ -156,6 +130,8 @@ export interface RunOptions {
   agent: AgentUnderTest
   /** `replay` (default, keyless) or `record` (real API, harvests the log). */
   mode: 'replay' | 'record'
+  /** Scenario-specific deployment environment layered into the subprocess. */
+  env?: NodeJS.ProcessEnv
   /** The recorded session JSONL fixture path (replay reads it; record writes near it). */
   fixtureFile: string
   /** Optional sidecar override path (replay). */
@@ -241,6 +217,7 @@ export async function runScenario(input: InputScript, opts: RunOptions): Promise
       await cp(opts.workspaceDir, cwd, { recursive: true })
     }
     const env: NodeJS.ProcessEnv = {
+      ...opts.env,
       DSH_SNAPSHOT: opts.mode,
       DSH_SNAPSHOT_FILE: opts.fixtureFile,
       DSH_SNAPSHOT_SESSIONS_ROOT: sessionsRoot,
@@ -256,13 +233,11 @@ export async function runScenario(input: InputScript, opts: RunOptions): Promise
     // Permission answers are consumed FIFO across the whole run; exhaustion
     // falls back to `cancelled` so approval-free scenarios keep the plain stub.
     const permissionQueue = [...input.permissionAnswers ?? []]
-    // Elicitation answers mirror the permission queue: FIFO, cancel on exhaustion.
-    const elicitationQueue = [...input.elicitationAnswers ?? []]
     // A scenario bug detected inside a client callback (a scripted permission
     // kind the agent never offered). It cannot fail the run from in there: a
     // callback throw only becomes a JSON-RPC error RESPONSE to the agent, and
     // a tolerant agent treats that as a denial and carries on — the run (or
-    // worse, a record) would absorb the impossible click silently. So the
+    // worse, a record) would absorb the impossible selection silently. So the
     // callback answers `cancelled` (a well-defined path for the agent),
     // captures the error here, and the step loop fails the run on it.
     let scriptError: Error | undefined
@@ -276,7 +251,7 @@ export async function runScenario(input: InputScript, opts: RunOptions): Promise
         if (answer === undefined) return Promise.resolve({ outcome: { outcome: 'cancelled' } })
         const option = params.options.find(o => o.kind === answer.kind)
         if (option === undefined) {
-          // The scenario scripted a click the agent never offered — a scenario
+          // The scenario scripted a selection the agent never offered — a scenario
           // bug. Captured (last one wins; same bug class either way) and
           // answered `cancelled`; the step loop rejects the run on it.
           scriptError = new Error(
@@ -287,17 +262,6 @@ export async function runScenario(input: InputScript, opts: RunOptions): Promise
         }
         return Promise.resolve({ outcome: { outcome: 'selected', optionId: option.optionId } })
       },
-      createElicitation(_params: CreateElicitationRequest): Promise<CreateElicitationResponse> {
-        const answer = elicitationQueue.shift()
-        if (answer === undefined || answer.action !== 'accept') return Promise.resolve({ action: 'cancel' })
-        return Promise.resolve({
-          action: 'accept',
-          content: {
-            ...answer.choice !== undefined ? { choice: answer.choice } : {},
-            ...answer.custom !== undefined ? { custom: answer.custom } : {},
-          },
-        })
-      },
     })
     const active = launched
     await active.spawned
@@ -311,6 +275,7 @@ export async function runScenario(input: InputScript, opts: RunOptions): Promise
         match => active.waitForUpdate(match),
         () => sessionId,
         (id) => { sessionId = id },
+        (id, timeoutMs, minimumTurn) => waitForPersistedTurnStart(sessionsRoot, id, timeoutMs, minimumTurn),
         (id, timeoutMs) => waitForPersistedTurnEnd(sessionsRoot, id, timeoutMs),
       )
       // A permission exchange happens while a step's request is in flight, so
@@ -382,13 +347,14 @@ async function runStep(
   waitForUpdate: (match: (u: SessionNotification['update']) => boolean) => Promise<SessionNotification['update']>,
   getSessionId: () => string | undefined,
   setSessionId: (id: string) => void,
+  waitForTurnStart: (sessionId: string, timeoutMs?: number, minimumTurn?: number) => Promise<void>,
   waitForTurnEnd: (sessionId: string, timeoutMs?: number) => Promise<void>,
 ): Promise<void> {
   switch (step.op) {
     case 'initialize':
       await client.initialize({
         protocolVersion: PROTOCOL_VERSION,
-        clientCapabilities: step.terminalOutput === true ? { _meta: { terminal_output: true } } : {},
+        clientCapabilities: {},
       })
       return
     case 'newSession': {
@@ -431,7 +397,7 @@ async function runStep(
       if (sessionId === undefined) throw new Error('snapshot-harness: promptExpectError before newSession')
       // The model fails this turn (a recorded provider error), so the bridge
       // answers the prompt with a JSON-RPC error and the SDK rejects. That
-      // rejection IS the expected editor experience — swallow it so the run
+      // rejection IS the expected protocol result — swallow it so the run
       // completes and the stdout transcript (the error frame) is captured.
       await client.prompt({ sessionId, prompt: [{ type: 'text', text: step.text }] })
         .then(() => { throw new Error('snapshot-harness: expected the prompt to fail but it succeeded') },
@@ -442,21 +408,16 @@ async function runStep(
       const sessionId = getSessionId()
       if (sessionId === undefined) throw new Error('snapshot-harness: promptAndCancel before newSession')
       // Dispatch without awaiting because the fixture does not settle on its
-      // own. Waiting for the selected update pins it before cancellation and
-      // the cancelled prompt response in the transcript.
+      // own. Wait for an external readiness marker or the durable turn start
+      // before sending cancellation.
       const promptDone = client.prompt({ sessionId, prompt: [{ type: 'text', text: step.text }] })
-      const afterUpdate = step.afterUpdate ?? 'agent_message_chunk'
-      await waitForUpdate(u => u.sessionUpdate === afterUpdate)
       if (step.waitForFile !== undefined) {
         await waitForWorkspaceFile(cwd, step.waitForFile.path, step.waitForFile.timeoutMs)
+      } else {
+        await waitForTurnStart(sessionId)
       }
-      // Arm this before cancellation so a fast tool drain cannot outrun the waiter.
-      const toolCallUpdateDone = step.waitForToolCallUpdate === undefined
-        ? undefined
-        : waitForUpdate(u => u.sessionUpdate === 'tool_call_update' && u.toolCallId === step.waitForToolCallUpdate)
       await client.cancel({ sessionId })
       await promptDone
-      if (toolCallUpdateDone !== undefined) await toolCallUpdateDone
       return
     }
     case 'waitForTurnEnd': {
@@ -465,53 +426,46 @@ async function runStep(
       await waitForTurnEnd(sessionId, step.timeoutMs)
       return
     }
+    case 'waitForTurnStart': {
+      const sessionId = getSessionId()
+      if (sessionId === undefined) throw new Error('snapshot-harness: waitForTurnStart before newSession')
+      await waitForTurnStart(sessionId, step.timeoutMs, step.minimumTurn)
+      return
+    }
     case 'cancel': {
       const sessionId = getSessionId()
       if (sessionId === undefined) throw new Error('snapshot-harness: cancel before newSession')
+      if (step.waitForFile !== undefined) {
+        await waitForWorkspaceFile(cwd, step.waitForFile.path, step.waitForFile.timeoutMs)
+      }
       await client.cancel({ sessionId })
       return
     }
-    case 'setMode': {
-      const sessionId = getSessionId()
-      if (sessionId === undefined) throw new Error('snapshot-harness: setMode before newSession')
-      await client.setSessionMode({ sessionId, modeId: step.modeId })
-      return
-    }
-    case 'setModeExpectError': {
-      const sessionId = getSessionId()
-      if (sessionId === undefined) throw new Error('snapshot-harness: setModeExpectError before newSession')
-      // The bridge rejects an unknown/uncomposed mode id with invalidParams;
-      // that rejection IS the expected wire behavior — swallow it so the run
-      // completes and the error frame is captured in the transcript.
-      await client.setSessionMode({ sessionId, modeId: step.modeId }).then(
-        () => { throw new Error('snapshot-harness: expected session/set_mode to be rejected but it succeeded') },
-        () => { /* expected: the bridge rejected the mode id */ },
-      )
-      return
-    }
-    case 'setConfigOption': {
-      const sessionId = getSessionId()
-      if (sessionId === undefined) throw new Error('snapshot-harness: setConfigOption before newSession')
-      await client.setSessionConfigOption({ sessionId, configId: step.configId, value: step.value })
-      return
-    }
-    case 'setConfigOptionExpectError': {
-      const sessionId = getSessionId()
-      if (sessionId === undefined) throw new Error('snapshot-harness: setConfigOptionExpectError before newSession')
-      // The bridge rejects an unknown id / out-of-vocabulary value; the SDK
-      // surfaces that as a rejected RPC — swallow it so the run completes and
-      // the error frame is captured in the transcript.
-      await client.setSessionConfigOption({ sessionId, configId: step.configId, value: step.value }).then(
-        () => { throw new Error('snapshot-harness: expected set_config_option to be rejected but it succeeded') },
-        () => { /* expected: the bridge rejected the id or value */ },
-      )
-      return
-    }
     default:
       throw new Error(`snapshot-harness: unknown input op ${JSON.stringify(step)}`)
   }
 }
 
+/** Wait until persistence exposes an open turn for the selected session. */
+async function waitForPersistedTurnStart(
+  root: string,
+  sessionId: string,
+  timeoutMs = DEFAULT_WAIT_TIMEOUT_MS,
+  minimumTurn?: number,
+): Promise<void> {
+  const deadline = Date.now() + timeoutMs
+  while (true) {
+    const log = (await harvestSessionLogs(root)).find(candidate => candidate.id === sessionId)
+    const openTurn = log === undefined ? undefined : latestOpenTurn(log.content)
+    if (openTurn !== undefined && (minimumTurn === undefined || openTurn >= minimumTurn)) return
+    if (Date.now() >= deadline) {
+      const detail = minimumTurn === undefined ? 'turn/start' : `turn/start at or beyond turn ${minimumTurn}`
+      throw new Error(`snapshot-harness: session "${sessionId}" did not persist ${detail} within ${timeoutMs}ms`)
+    }
+    await delay(WAIT_POLL_INTERVAL_MS)
+  }
+}
+
 /**
  * Wait until the raw JSONL backend exposes one complete closing turn boundary.
  * The ACP cancel notification settles its prompt before the agent necessarily
@@ -557,6 +511,20 @@ function latestTurnIsClosed(content: string): boolean {
     > complete.lastIndexOf('\n{"type":"turn/start",')
 }
 
+/** Return the latest open turn number, validating the persisted boundary record. */
+function latestOpenTurn(content: string): number | undefined {
+  const complete = content.slice(0, content.lastIndexOf('\n') + 1)
+  const start = complete.lastIndexOf('\n{"type":"turn/start",')
+  if (start <= complete.lastIndexOf('\n{"type":"turn/end",')) return undefined
+  const end = complete.indexOf('\n', start + 1)
+  const record = JSON.parse(complete.slice(start + 1, end)) as { data?: { turn?: unknown } | null }
+  const turn = record.data?.turn
+  if (!Number.isSafeInteger(turn) || (turn as number) < 1) {
+    throw new Error('snapshot-harness: invalid persisted turn/start record')
+  }
+  return turn as number
+}
+
 /**
  * Harvest EVERY persisted `.jsonl` session log under a sessions root, parse each
  * header line, and return them ordered primary-first: the top-level session (no
diff --git a/packages/support/acp-snapshot/src/index.ts b/packages/support/acp-snapshot/src/index.ts
index 53e7b0d5f9..2a03947fef 100644
--- a/packages/support/acp-snapshot/src/index.ts
+++ b/packages/support/acp-snapshot/src/index.ts
@@ -18,7 +18,6 @@
 
 export {
   runScenario,
-  type ElicitationAnswer,
   type HarvestedLog,
   type InputScript,
   type InputStep,
diff --git a/packages/support/acp-snapshot/src/launcher.ts b/packages/support/acp-snapshot/src/launcher.ts
index d10d05c15b..441ab463d7 100644
--- a/packages/support/acp-snapshot/src/launcher.ts
+++ b/packages/support/acp-snapshot/src/launcher.ts
@@ -15,8 +15,6 @@ import {
   ndJsonStream,
   type Agent as AcpAgent,
   type Client,
-  type CreateElicitationRequest,
-  type CreateElicitationResponse,
   type RequestPermissionRequest,
   type RequestPermissionResponse,
   type SessionNotification,
@@ -49,8 +47,6 @@ export interface AcpTestLaunchOptions {
   env?: NodeJS.ProcessEnv
   /** Permission handler; omitted requests fail closed as `cancelled`. */
   requestPermission?: (params: RequestPermissionRequest) => Promise<RequestPermissionResponse>
-  /** Elicitation handler; omitted requests fail closed as `cancel`. */
-  createElicitation?: (params: CreateElicitationRequest) => Promise<CreateElicitationResponse>
 }
 
 /** A running ACP test process and its captured client-side surfaces. */
@@ -156,8 +152,6 @@ export function launchAcpTestAgent(options: AcpTestLaunchOptions): LaunchedAcpTe
   }
   const requestPermission = options.requestPermission
     ?? (() => Promise.resolve({ outcome: { outcome: 'cancelled' as const } }))
-  const createElicitation = options.createElicitation
-    ?? (() => Promise.resolve({ action: 'cancel' as const }))
   const makeClient = (_agent: AcpAgent): Client => ({
     sessionUpdate(params: SessionNotification): Promise<void> {
       return trackClientCallback(() => {
@@ -181,7 +175,6 @@ export function launchAcpTestAgent(options: AcpTestLaunchOptions): LaunchedAcpTe
       })
     },
     requestPermission: params => trackClientCallback(() => requestPermission(params)),
-    unstable_createElicitation: params => trackClientCallback(() => createElicitation(params)),
   })
   const client = new ClientSideConnection(makeClient, stream)
   // `exit` only reports the parent process's status. Descendants may retain
diff --git a/packages/support/acp-snapshot/src/normalize.ts b/packages/support/acp-snapshot/src/normalize.ts
index b32c5c0574..0c58753afc 100644
--- a/packages/support/acp-snapshot/src/normalize.ts
+++ b/packages/support/acp-snapshot/src/normalize.ts
@@ -11,7 +11,6 @@ const CWD = '{{cwd}}'
 const SYSTEM = '{{system}}'
 const TOOLS = '{{tools}}'
 const MESSAGE_PREFIX = '{{messagePrefix}}'
-const UPDATED_AT = '{{updatedAt}}'
 
 /** A cwd-rooted path after volatile cwd replacement, through its last separator-delimited segment. */
 const CWD_ROOTED_PATH_RE = /\{\{cwd\}\}(?:[\\/][^\s<>"'`]+)+/g
@@ -124,8 +123,6 @@ export function normalizeStdout(
     if ('id' in frame && frame.id !== undefined && frame.id !== null) {
       frame.id = stableId(frame.id)
     }
-    const update = (frame.params as { update?: Record<string, unknown> } | undefined)?.update
-    if (update?.sessionUpdate === 'session_info_update') update.updatedAt = UPDATED_AT
     return scrubValue(frame, ctx, cwdPathMode) as Record<string, unknown>
   })
   return frames.map(f => JSON.stringify(f)).join('\n') + '\n'
diff --git a/packages/support/acp-snapshot/src/suite.ts b/packages/support/acp-snapshot/src/suite.ts
index 51e958a106..43c4273ee0 100644
--- a/packages/support/acp-snapshot/src/suite.ts
+++ b/packages/support/acp-snapshot/src/suite.ts
@@ -47,6 +47,8 @@ const PACKED_CHUNK_ROW_TYPES = new Set(['text-chunks', 'reasoning-chunks', 'tool
 /** A snapshot scenario and how its fixtures are produced. */
 export interface Scenario {
   name: string
+  /** Deployment environment for this scenario's subprocess. */
+  env?: NodeJS.ProcessEnv
   /** Whether the scenario drives at least one model turn (so a JSONL expected output applies). */
   hasModelTurn: boolean
   /**
@@ -604,6 +606,7 @@ export function defineAcpSnapshotSuite(options: SnapshotSuiteOptions): void {
           agent,
           mode: childMode,
           fixtureFile: join(dir, 'session.jsonl'),
+          ...scenario.env !== undefined ? { env: scenario.env } : {},
           ...existsSync(overrideFile) ? { overrideFile } : {},
           // In REPLAY, forward the recorded child fixtures so each subagent session
           // replays from its own script. In RECORD they are harvested, not read.
diff --git a/packages/support/acp-snapshot/tests/fixtures/fake-acp-agent.ts b/packages/support/acp-snapshot/tests/fixtures/fake-acp-agent.ts
index df3bb0b970..00e7c8756a 100644
--- a/packages/support/acp-snapshot/tests/fixtures/fake-acp-agent.ts
+++ b/packages/support/acp-snapshot/tests/fixtures/fake-acp-agent.ts
@@ -45,18 +45,10 @@ interface Behavior {
   rejectExtraDirs?: boolean
   /** How `session/prompt` settles: a clean response, a JSON-RPC error, or a hang until `session/cancel`. */
   prompt?: 'respond' | 'error' | 'hang-until-cancel'
-  /** Emit a tool call instead of a message chunk before parking a cancellable prompt. */
-  cancelAtToolCall?: boolean
-  /** Emit the parked tool call's terminal update after answering cancellation. */
-  cancelToolCallUpdate?: boolean
   /** Persist the scripted logs while handling cancellation, before stdin EOF. */
   persistLogsOnCancel?: boolean
   /** Before responding to a prompt, send a `session/request_permission` request and echo its outcome as a chunk. */
   permissionProbe?: boolean
-  /** Before responding to a prompt, send an `elicitation/create` request and echo its response as a chunk. */
-  elicitationProbe?: boolean
-  /** How `session/set_mode` settles: an empty response (echoing the modeId as a chunk) or a JSON-RPC error. */
-  setMode?: 'respond' | 'error'
   /** Echo the `DSH_SNAPSHOT_*` env the harness set as a chunk (spec-side env-plumbing assertions). */
   echoEnv?: boolean
   /** Echo the sorted cwd listing as a chunk (spec-side workspace-seeding assertions). */
@@ -73,13 +65,6 @@ interface Behavior {
   strayBucketFile?: boolean
   /** Delete the sessions root entirely (harvest must yield no logs). */
   deleteSessionsRoot?: boolean
-  /**
-   * Vocabulary for `session/set_config_option`: allowed values per config id.
-   * A set naming an unknown id or an out-of-vocabulary value rejects (the
-   * real bridge's rule); a valid set answers with the complete refreshed
-   * option state, `currentValue` updated. Absent: every set rejects.
-   */
-  configOptions?: Record<string, string[]>
 }
 
 const sessionsRoot = process.env.DSH_SNAPSHOT_SESSIONS_ROOT ?? ''
@@ -102,10 +87,10 @@ let sessionId = ''
 let sessionCwd = ''
 /** The parked prompt request id while `hang-until-cancel` waits for the cancel notification. */
 let parkedPromptId: number | string | null = null
-/** Resolvers for outbound probe responses (permission/elicitation), keyed by request id. */
+/** The transient raw JSONL log that proves the parked turn started durably. */
+let parkedTurnLog: string | undefined
+/** Resolvers for outbound permission responses, keyed by request id. */
 const pendingOutbound = new Map<number, (result: unknown) => void>()
-/** Per-run `session/set_config_option` state: config id → current value (first vocabulary entry until set). */
-const currentConfig: Record<string, string> = {}
 
 function send(frame: Record<string, unknown>): void {
   process.stdout.write(`${JSON.stringify({ jsonrpc: '2.0', ...frame })}\n`)
@@ -138,33 +123,26 @@ function instantiate(value: unknown): unknown {
   return value
 }
 
+/** Persist an open turn so cancellation tests wait on agent state, not presentation output. */
+function persistParkedTurnStart(): void {
+  parkedTurnLog = join(sessionsRoot, 'ready', 'open.jsonl')
+  mkdirSync(dirname(parkedTurnLog), { recursive: true })
+  writeFileSync(parkedTurnLog, [
+    JSON.stringify({ type: 'session', version: 0, id: sessionId, createdAt: 1, cwd: sessionCwd, delegationDepth: 0 }),
+    JSON.stringify({ type: 'turn/start', seq: 0, time: 1, data: { turn: 1 } }),
+    '',
+  ].join('\n'))
+}
+
+/** Remove the transient open-turn log before publishing any scripted final logs. */
+function clearParkedTurnStart(): void {
+  if (parkedTurnLog === undefined) return
+  rmSync(parkedTurnLog, { force: true })
+  parkedTurnLog = undefined
+}
+
 async function handlePrompt(id: number | string): Promise<void> {
-  if ((behavior.prompt ?? 'respond') === 'hang-until-cancel') {
-    // A thought chunk BEFORE any message chunk: a promptAndCancel waiter
-    // watches for agent_message_chunk, so this exercises its non-matching
-    // update path while the waiter is armed.
-    send({
-      method: 'session/update',
-      params: { sessionId, update: { sessionUpdate: 'agent_thought_chunk', content: { type: 'text', text: 'mulling' } } },
-    })
-  }
-  if (behavior.cancelAtToolCall === true) {
-    send({
-      method: 'session/update',
-      params: {
-        sessionId,
-        update: {
-          sessionUpdate: 'tool_call',
-          toolCallId: 'call_fake_1',
-          title: 'fake tool',
-          kind: 'execute',
-          status: 'in_progress',
-        },
-      },
-    })
-  } else {
-    chunk('thinking about it')
-  }
+  chunk('thinking about it')
   if (behavior.echoEnv === true) {
     chunk(`env:${JSON.stringify({
       mode: process.env.DSH_SNAPSHOT,
@@ -185,7 +163,7 @@ async function handlePrompt(id: number | string): Promise<void> {
         method: 'session/request_permission',
         params: {
           sessionId,
-          toolCall: { toolCallId: 'call_fake_1', title: 'fake tool', kind: 'execute', status: 'pending' },
+          toolCall: { toolCallId: 'call_fake_1' },
           options: [
             { optionId: 'opt-allow', name: 'Allow once', kind: 'allow_once' },
             { optionId: 'opt-reject', name: 'Reject once', kind: 'reject_once' },
@@ -195,23 +173,6 @@ async function handlePrompt(id: number | string): Promise<void> {
     })
     chunk(`permission:${JSON.stringify((result as { outcome?: unknown } | undefined)?.outcome ?? null)}`)
   }
-  if (behavior.elicitationProbe === true) {
-    const requestId = nextOutboundId++
-    const result = await new Promise<unknown>((resolve) => {
-      pendingOutbound.set(requestId, resolve)
-      send({
-        id: requestId,
-        method: 'elicitation/create',
-        params: {
-          sessionId,
-          mode: 'form',
-          message: 'Approve this plan and leave plan mode?',
-          requestedSchema: { type: 'object', title: 'Plan review', properties: { choice: { type: 'string' }, custom: { type: 'string' } }, required: [] },
-        },
-      })
-    })
-    chunk(`elicitation:${JSON.stringify(result ?? null)}`)
-  }
   switch (behavior.prompt ?? 'respond') {
     case 'respond':
       respond(id, { stopReason: 'end_turn' })
@@ -220,6 +181,7 @@ async function handlePrompt(id: number | string): Promise<void> {
       respondError(id, 'model exploded')
       return
     case 'hang-until-cancel':
+      persistParkedTurnStart()
       parkedPromptId = id
       return
   }
@@ -254,59 +216,13 @@ function handleFrame(frame: Record<string, unknown>): void {
     case 'session/prompt':
       void handlePrompt(id as number | string)
       return
-    case 'session/set_mode':
-      if ((behavior.setMode ?? 'respond') === 'error') {
-        respondError(id as number | string, 'unknown mode')
-        return
-      }
-      chunk(`setMode:${String(params.modeId)}`)
-      respond(id as number | string, {})
-      return
-    case 'session/set_config_option': {
-      const vocabulary = behavior.configOptions
-      const configId = params.configId as string
-      const value = params.value as string
-      const values = vocabulary?.[configId]
-      if (values === undefined) {
-        respondError(id as number | string, `unknown config option ${configId}`)
-        return
-      }
-      if (!values.includes(value)) {
-        respondError(id as number | string, `unknown ${configId} value ${value}`)
-        return
-      }
-      currentConfig[configId] = value
-      // The real bridge's contract: every set answers with the COMPLETE
-      // refreshed option state, not just the changed entry.
-      respond(id as number | string, {
-        configOptions: Object.entries(vocabulary as Record<string, string[]>).map(([cid, vs]) => ({
-          id: cid,
-          type: 'select',
-          currentValue: currentConfig[cid] ?? vs[0],
-          options: vs.map(v => ({ value: v, name: v })),
-        })),
-      })
-      return
-    }
     case 'session/cancel':
       if (parkedPromptId !== null) {
         const parked = parkedPromptId
         parkedPromptId = null
-        respond(parked, { stopReason: 'cancelled' })
-        if (behavior.cancelToolCallUpdate === true) {
-          send({
-            method: 'session/update',
-            params: {
-              sessionId,
-              update: {
-                sessionUpdate: 'tool_call_update',
-                toolCallId: 'call_fake_1',
-                status: 'failed',
-              },
-            },
-          })
-        }
+        clearParkedTurnStart()
         if (behavior.persistLogsOnCancel === true) writeLogs()
+        respond(parked, { stopReason: 'cancelled' })
       }
       return
     default:
@@ -325,6 +241,7 @@ function writeLogs(): void {
 }
 
 function flushLogsAndExit(): void {
+  clearParkedTurnStart()
   writeLogs()
   if (behavior.strayRootFile === true) writeFileSync(join(sessionsRoot, 'stray.txt'), 'not a bucket\n')
   if (behavior.strayBucketFile === true) {
diff --git a/packages/support/acp-snapshot/tests/harness.spec.ts b/packages/support/acp-snapshot/tests/harness.spec.ts
index a87e72d3d4..7c8de992f4 100644
--- a/packages/support/acp-snapshot/tests/harness.spec.ts
+++ b/packages/support/acp-snapshot/tests/harness.spec.ts
@@ -95,8 +95,8 @@ describe('runScenario', () => {
     expect(clientClosed).toBe(true)
   })
 
-  it('centralizes ACP boot, captures, updates, fail-closed interactions, and shutdown', { timeout: 20_000 }, async () => {
-    const { dir, fixtureFile } = await scenario({ permissionProbe: true, elicitationProbe: true, echoEnv: true, stderrNote: 'launcher stderr' })
+  it('centralizes ACP boot, captures, updates, fail-closed permissions, and shutdown', { timeout: 20_000 }, async () => {
+    const { dir, fixtureFile } = await scenario({ permissionProbe: true, echoEnv: true, stderrNote: 'launcher stderr' })
     const sessionsRoot = await mkdtemp(join(tmpdir(), 'acp-launcher-sessions-'))
     tempDirs.push(sessionsRoot)
     const launched = launchAcpTestAgent({
@@ -112,6 +112,8 @@ describe('runScenario', () => {
     await launched.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
     const { sessionId } = await launched.client.newSession({ cwd: dir, mcpServers: [] })
     const nextChunk = launched.waitForUpdate(update => update.sessionUpdate === 'agent_message_chunk')
+    const laterChunk = launched.waitForUpdate(update => update.sessionUpdate === 'agent_message_chunk'
+      && update.content.type === 'text' && update.content.text === 'never this one')
     const predicateFailure = new Error('predicate failed')
     const failedPredicate = launched.waitForUpdate(() => { throw predicateFailure })
       .catch((error: unknown): unknown => error)
@@ -120,8 +122,8 @@ describe('runScenario', () => {
     expect((await nextChunk).sessionUpdate).toBe('agent_message_chunk')
     expect(launched.updates.some(update => update.sessionUpdate === 'agent_message_chunk')).toBe(true)
     expect(launched.rawStdout()).toContain('permission:{\\"outcome\\":\\"cancelled\\"}')
-    expect(launched.rawStdout()).toContain('elicitation:{\\"action\\":\\"cancel\\"}')
     expect(launched.stderr()).toContain('launcher stderr')
+    void laterChunk.catch(() => undefined)
     const unmatched = expect(launched.waitForUpdate(() => false)).rejects.toThrow(/update stream closed/)
     await launched.close()
     await unmatched
@@ -374,7 +376,7 @@ describe('runScenario', () => {
     }
   })
 
-  it('drives a full turn: initialize (terminal caps), session, prompt, permission stub, harvest', { timeout: 20_000 }, async () => {
+  it('drives a full turn: initialize, session, prompt, permission stub, harvest', { timeout: 20_000 }, async () => {
     const { fixtureFile } = await scenario({
       permissionProbe: true,
       logs: [{
@@ -386,7 +388,7 @@ describe('runScenario', () => {
       }],
     })
     const result = await runScenario(
-      { steps: [{ op: 'initialize', terminalOutput: true }, { op: 'newSession' }, { op: 'prompt', text: 'go' }] },
+      { steps: [{ op: 'initialize' }, { op: 'newSession' }, { op: 'prompt', text: 'go' }] },
       { agent: AGENT, mode: 'replay', fixtureFile },
     )
     expect(result.sessionId).toBeDefined()
@@ -482,7 +484,7 @@ describe('runScenario', () => {
     expect(child.startsWith(`..${sep}`)).toBe(false)
   })
 
-  it('promptAndCancel waits for the streamed chunk, cancels, and settles the prompt', { timeout: 20_000 }, async () => {
+  it('promptAndCancel waits for the durable turn start, cancels, and settles the prompt', { timeout: 20_000 }, async () => {
     const { fixtureFile } = await scenario({ prompt: 'hang-until-cancel' })
     const result = await runScenario(
       { steps: [...boot, { op: 'promptAndCancel', text: 'hang' }] },
@@ -539,28 +541,6 @@ describe('runScenario', () => {
     expect(result.rawStdout).toContain('thinking about it')
   })
 
-  it('promptAndCancel can bracket cancellation with tool-call updates', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({
-      prompt: 'hang-until-cancel',
-      cancelAtToolCall: true,
-      cancelToolCallUpdate: true,
-    })
-    const result = await runScenario(
-      {
-        steps: [...boot, {
-          op: 'promptAndCancel',
-          text: 'hang',
-          afterUpdate: 'tool_call',
-          waitForToolCallUpdate: 'call_fake_1',
-        }],
-      },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )
-    expect(result.rawStdout).toContain('"sessionUpdate":"tool_call"')
-    expect(result.rawStdout.indexOf('"sessionUpdate":"tool_call"')).toBeLessThan(result.rawStdout.indexOf('cancelled'))
-    expect(result.rawStdout.indexOf('cancelled')).toBeLessThan(result.rawStdout.indexOf('"sessionUpdate":"tool_call_update"'))
-  })
-
   it('waitForTurnEnd holds cancellation open through the persisted closing boundary', { timeout: 20_000 }, async () => {
     const { fixtureFile } = await scenario({
       prompt: 'hang-until-cancel',
@@ -580,6 +560,108 @@ describe('runScenario', () => {
     expect(result.sessionLogs[0]?.content).toContain('"type":"turn/end"')
   })
 
+  it('waitForTurnStart can require a later durable turn before continuing', { timeout: 20_000 }, async () => {
+    const { fixtureFile } = await scenario({
+      prompt: 'hang-until-cancel',
+      persistLogsOnCancel: true,
+      logs: [{
+        file: 'bucket/session.jsonl',
+        lines: [
+          { type: 'session', version: 0, id: '{{SID}}', createdAt: 1, delegationDepth: 0 },
+          { type: 'turn/start', seq: 0, time: 1, data: { turn: 3 } },
+        ],
+      }],
+    })
+    const result = await runScenario(
+      {
+        steps: [
+          ...boot,
+          { op: 'promptAndCancel', text: 'hang' },
+          { op: 'waitForTurnStart', minimumTurn: 3 },
+        ],
+      },
+      { agent: AGENT, mode: 'replay', fixtureFile },
+    )
+    expect(result.sessionLogs[0]?.content).toContain('"turn":3')
+  })
+
+  it('waitForTurnStart rejects missing, earlier, and malformed durable turns', { timeout: 20_000 }, async () => {
+    const missing = await scenario({})
+    await expect(runScenario(
+      { steps: [...boot, { op: 'waitForTurnStart', timeoutMs: 20 }] },
+      { agent: AGENT, mode: 'replay', fixtureFile: missing.fixtureFile },
+    )).rejects.toThrow(/did not persist turn\/start within 20ms/)
+
+    const earlier = await scenario({
+      prompt: 'hang-until-cancel',
+      persistLogsOnCancel: true,
+      logs: [{
+        file: 'bucket/session.jsonl',
+        lines: [
+          { type: 'session', version: 0, id: '{{SID}}', createdAt: 1, delegationDepth: 0 },
+          { type: 'turn/start', seq: 0, time: 1, data: { turn: 1 } },
+        ],
+      }],
+    })
+    await expect(runScenario(
+      {
+        steps: [
+          ...boot,
+          { op: 'promptAndCancel', text: 'hang' },
+          { op: 'waitForTurnStart', minimumTurn: 3, timeoutMs: 20 },
+        ],
+      },
+      { agent: AGENT, mode: 'replay', fixtureFile: earlier.fixtureFile },
+    )).rejects.toThrow(/turn\/start at or beyond turn 3 within 20ms/)
+
+    const closed = await scenario({
+      prompt: 'hang-until-cancel',
+      persistLogsOnCancel: true,
+      logs: [{
+        file: 'bucket/session.jsonl',
+        lines: [
+          { type: 'session', version: 0, id: '{{SID}}', createdAt: 1, delegationDepth: 0 },
+          { type: 'turn/start', seq: 0, time: 1, data: { turn: 1 } },
+          { type: 'turn/end', seq: 1, time: 2, data: { turn: 1, reason: { kind: 'stop' } } },
+        ],
+      }],
+    })
+    await expect(runScenario(
+      {
+        steps: [
+          ...boot,
+          { op: 'promptAndCancel', text: 'hang' },
+          { op: 'waitForTurnStart', timeoutMs: 20 },
+        ],
+      },
+      { agent: AGENT, mode: 'replay', fixtureFile: closed.fixtureFile },
+    )).rejects.toThrow(/did not persist turn\/start within 20ms/)
+
+    for (const turn of [undefined, 0]) {
+      const malformed = await scenario({
+        prompt: 'hang-until-cancel',
+        persistLogsOnCancel: true,
+        logs: [{
+          file: 'bucket/session.jsonl',
+          lines: [
+            { type: 'session', version: 0, id: '{{SID}}', createdAt: 1, delegationDepth: 0 },
+            { type: 'turn/start', seq: 0, time: 1, data: turn === undefined ? {} : { turn } },
+          ],
+        }],
+      })
+      await expect(runScenario(
+        {
+          steps: [
+            ...boot,
+            { op: 'promptAndCancel', text: 'hang' },
+            { op: 'waitForTurnStart' },
+          ],
+        },
+        { agent: AGENT, mode: 'replay', fixtureFile: malformed.fixtureFile },
+      )).rejects.toThrow('invalid persisted turn/start record')
+    }
+  })
+
   it('waitForTurnEnd times out for a missing log and an open logged turn', { timeout: 20_000 }, async () => {
     const missing = await scenario({})
     await expect(runScenario(
@@ -695,15 +777,27 @@ describe('runScenario', () => {
     expect(result.sessionId).toBeDefined()
   })
 
+  it('a standalone cancel can wait for cwd-relative readiness', { timeout: 20_000 }, async () => {
+    const { dir, fixtureFile } = await scenario({})
+    const workspaceDir = join(dir, 'workspace')
+    const { mkdir } = await import('node:fs/promises')
+    await mkdir(workspaceDir, { recursive: true })
+    await writeFile(join(workspaceDir, 'ready'), '')
+    const result = await runScenario(
+      { steps: [...boot, { op: 'cancel', waitForFile: { path: 'ready' } }] },
+      { agent: AGENT, mode: 'replay', fixtureFile, workspaceDir },
+    )
+    expect(result.sessionId).toBeDefined()
+  })
+
   it.each([
     [{ op: 'prompt', text: 'x' }, /prompt before newSession/],
     [{ op: 'promptAndWaitForAgentMessage', text: 'x', waitForText: 'later' }, /promptAndWaitForAgentMessage before newSession/],
     [{ op: 'promptExpectError', text: 'x' }, /promptExpectError before newSession/],
     [{ op: 'promptAndCancel', text: 'x' }, /promptAndCancel before newSession/],
+    [{ op: 'waitForTurnStart' }, /waitForTurnStart before newSession/],
     [{ op: 'waitForTurnEnd' }, /waitForTurnEnd before newSession/],
     [{ op: 'cancel' }, /cancel before newSession/],
-    [{ op: 'setConfigOption', configId: 'sandbox-mode', value: 'read-only' }, /setConfigOption before newSession/],
-    [{ op: 'setConfigOptionExpectError', configId: 'sandbox-mode', value: 'yolo' }, /setConfigOptionExpectError before newSession/],
   ] as [InputStep, RegExp][])('rejects %j before newSession', { timeout: 20_000 }, async (step, message) => {
     const { fixtureFile } = await scenario({})
     await expect(runScenario(
@@ -712,53 +806,6 @@ describe('runScenario', () => {
     )).rejects.toThrow(message)
   })
 
-  it('setConfigOption switches a value and receives the complete refreshed option state', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({
-      configOptions: { 'sandbox-mode': ['read-only', 'workspace-write'], 'approval-policy': ['ask', 'never'] },
-    })
-    const result = await runScenario(
-      {
-        steps: [...boot,
-          { op: 'setConfigOption', configId: 'sandbox-mode', value: 'workspace-write' },
-          { op: 'setConfigOption', configId: 'approval-policy', value: 'never' }],
-      },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )
-    // Every set answers with the FULL state: the second response carries the
-    // first switch's value too — the complete-refreshed-state contract.
-    const frames = result.rawStdout.trim().split('\n').map(line => JSON.parse(line) as { result?: { configOptions?: { id: string; currentValue: string }[] } })
-    const states = frames
-      .map(f => f.result?.configOptions)
-      .filter(options => options !== undefined)
-      .map(options => Object.fromEntries((options as { id: string; currentValue: string }[]).map(o => [o.id, o.currentValue])))
-    expect(states).toEqual([
-      { 'sandbox-mode': 'workspace-write', 'approval-policy': 'ask' },
-      { 'sandbox-mode': 'workspace-write', 'approval-policy': 'never' },
-    ])
-  })
-
-  it('setConfigOptionExpectError swallows the rejection for unknown ids and out-of-vocabulary values', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({ configOptions: { 'sandbox-mode': ['read-only'] } })
-    const result = await runScenario(
-      {
-        steps: [...boot,
-          { op: 'setConfigOptionExpectError', configId: 'sandbox-mode', value: 'yolo' },
-          { op: 'setConfigOptionExpectError', configId: 'reasoning-effort', value: 'max' }],
-      },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )
-    expect(result.rawStdout).toContain('unknown sandbox-mode value yolo')
-    expect(result.rawStdout).toContain('unknown config option reasoning-effort')
-  })
-
-  it('setConfigOptionExpectError throws when the set unexpectedly succeeds', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({ configOptions: { 'sandbox-mode': ['read-only'] } })
-    await expect(runScenario(
-      { steps: [...boot, { op: 'setConfigOptionExpectError', configId: 'sandbox-mode', value: 'read-only' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )).rejects.toThrow(/expected set_config_option to be rejected/)
-  })
-
   it('rejects an unknown input op', { timeout: 20_000 }, async () => {
     const { fixtureFile } = await scenario({})
     const bogus = { op: 'reticulate' } as unknown as InputStep
@@ -814,69 +861,6 @@ describe('runScenario', () => {
     expect(result.sessionLogs).toHaveLength(0)
   })
 
-  it('drives session/set_mode and swallows the expected rejection of setModeExpectError', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({})
-    const result = await runScenario(
-      { steps: [...boot, { op: 'setMode', modeId: 'plan' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )
-    expect(result.rawStdout).toContain('setMode:plan')
-
-    const rejecting = await scenario({ setMode: 'error' })
-    const rejected = await runScenario(
-      { steps: [...boot, { op: 'setModeExpectError', modeId: 'yolo' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile: rejecting.fixtureFile },
-    )
-    expect(rejected.rawStdout).toContain('unknown mode')
-  })
-
-  it('fails the run when setModeExpectError unexpectedly succeeds, and both mode ops require a session', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({})
-    await expect(runScenario(
-      { steps: [...boot, { op: 'setModeExpectError', modeId: 'plan' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )).rejects.toThrow(/expected session\/set_mode to be rejected/)
-    await expect(runScenario(
-      { steps: [{ op: 'initialize' }, { op: 'setMode', modeId: 'plan' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )).rejects.toThrow(/setMode before newSession/)
-    await expect(runScenario(
-      { steps: [{ op: 'initialize' }, { op: 'setModeExpectError', modeId: 'plan' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )).rejects.toThrow(/setModeExpectError before newSession/)
-  })
-
-  it('answers elicitations from the scripted queue, falling back to cancel on exhaustion', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({ elicitationProbe: true })
-    // Three prompts → three elicitations: an accept-with-choice, an
-    // accept-with-custom (feedback), then the exhausted-queue cancel.
-    const result = await runScenario(
-      {
-        steps: [...boot, { op: 'prompt', text: 'one' }, { op: 'prompt', text: 'two' }, { op: 'prompt', text: 'three' }],
-        elicitationAnswers: [
-          { action: 'accept', choice: 'Approve' },
-          { action: 'accept', custom: 'add tests first' },
-        ],
-      },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )
-    const first = result.rawStdout.indexOf('elicitation:{\\"action\\":\\"accept\\",\\"content\\":{\\"choice\\":\\"Approve\\"}}')
-    const second = result.rawStdout.indexOf('elicitation:{\\"action\\":\\"accept\\",\\"content\\":{\\"custom\\":\\"add tests first\\"}}')
-    const third = result.rawStdout.indexOf('elicitation:{\\"action\\":\\"cancel\\"}')
-    expect(first).toBeGreaterThanOrEqual(0)
-    expect(second).toBeGreaterThan(first)
-    expect(third).toBeGreaterThan(second)
-  })
-
-  it('a scripted elicitation cancel answers cancel', { timeout: 20_000 }, async () => {
-    const { fixtureFile } = await scenario({ elicitationProbe: true })
-    const result = await runScenario(
-      { steps: [...boot, { op: 'prompt', text: 'one' }], elicitationAnswers: [{ action: 'cancel' }] },
-      { agent: AGENT, mode: 'replay', fixtureFile },
-    )
-    expect(result.rawStdout).toContain('elicitation:{\\"action\\":\\"cancel\\"}')
-  })
-
   it('answers permission requests from the scripted queue by option kind, falling back to cancelled', { timeout: 20_000 }, async () => {
     const { fixtureFile } = await scenario({ permissionProbe: true })
     // Two prompts → two permission round-trips; one scripted answer, so the
diff --git a/packages/support/acp-snapshot/tests/normalize.spec.ts b/packages/support/acp-snapshot/tests/normalize.spec.ts
index bdd85491d2..96c7036cc9 100644
--- a/packages/support/acp-snapshot/tests/normalize.spec.ts
+++ b/packages/support/acp-snapshot/tests/normalize.spec.ts
@@ -105,24 +105,6 @@ Additional instructions from: nested\AGENTS.md`,
     expect(out).not.toContain('"id"')
   })
 
-  it('stabilizes the timestamp carried by session title updates', () => {
-    const raw = JSON.stringify({
-      jsonrpc: '2.0',
-      method: 'session/update',
-      params: {
-        sessionId: ctx.sessionIds[0],
-        update: {
-          sessionUpdate: 'session_info_update',
-          title: 'Stable title',
-          updatedAt: '2026-07-20T17:03:13.689Z',
-        },
-      },
-    })
-    const out = normalizeStdout(raw, ctx)
-    expect(out).toContain('"updatedAt":"{{updatedAt}}"')
-    expect(out).not.toContain('2026-07-20T17:03:13.689Z')
-  })
-
   it('throws on a non-JSON stdout line (the purity check)', () => {
     const raw = `${JSON.stringify({ jsonrpc: '2.0', id: 1 })}\noops a log leaked\n`
     expect(() => normalizeStdout(raw, ctx)).toThrow()
diff --git a/packages/support/acp-snapshot/tests/suite.spec.ts b/packages/support/acp-snapshot/tests/suite.spec.ts
index 14bcb8178c..15838480c7 100644
--- a/packages/support/acp-snapshot/tests/suite.spec.ts
+++ b/packages/support/acp-snapshot/tests/suite.spec.ts
@@ -53,6 +53,7 @@ const REPLAY_SCENARIOS: Scenario[] = [
     hasModelTurn: true,
     recorded: true,
     headerClass: 'main',
+    env: { DSH_PERMISSION_MODE: 'never' },
     configPath: AGENT.configPath,
     workspaceParent: tmpdir(),
   },
diff --git a/packages/support/llm-replay/README.md b/packages/support/llm-replay/README.md
index 0d89d4337d..40227393d3 100644
--- a/packages/support/llm-replay/README.md
+++ b/packages/support/llm-replay/README.md
@@ -1,6 +1,6 @@
 # @deepseek-ai/dsh-llm-replay
 
-A replay LLM plugin for keyless snapshot tests. It yields model streams reconstructed from a recorded **session JSONL** fixture, so a test can boot the real agent against a fixed model transcript with no API key. With `providers` configured it registers a replay-only adapter whose catalog is visible to clients such as ACP editors; without `providers` it installs the catch-all `llm/stream` waterfall used by tests that do not need discovery.
+A replay LLM plugin for keyless snapshot tests. It yields model streams reconstructed from a recorded **session JSONL** fixture, so a test can boot the real agent against a fixed model transcript with no API key. With `providers` configured it registers a replay-only adapter whose catalog is available to scenarios that exercise model discovery; without `providers` it installs the catch-all `llm/stream` waterfall used by tests that do not need discovery.
 
 Its consumers are the ACP snapshot harness in `examples/acp-agent` and the `stream-json` snapshot in `examples/headless-agent`; each loads this plugin in place of a real LLM adapter. Keeping derivation and replay here places that logic under the per-file 100% coverage gate on `packages/*/src`.
 
@@ -8,7 +8,7 @@ Its consumers are the ACP snapshot harness in `examples/acp-agent` and the `stre
 
 The fixture IS the persisted session log (`<scenario>/session.jsonl`). Its `assistant/chunk` events carry every `StreamChunk`, so grouping them by `(turn, step)` reconstructs each `stream()` call's chunk sequence (one model call per loop step). Recording is therefore "run the real agent once and harvest the `.jsonl`", done by the snapshot harness — this plugin does not record. A fixture may carry its `request/header` content tokenized to `{{system}}`/`{{tools}}` (the harness pins that content in one scenario and scrubs the rest); replay is indifferent — derivation reads only `assistant/chunk` events and the line-0 session header.
 
-Two failure modes are not reconstructable from `assistant/chunk` alone — a pure throw before any chunk (e.g. an HTTP 401, where the log holds only a `turn/end {error}` and no chunks) and a cancel/hang (timing, not chunk content). A scenario that needs those supplies an optional sidecar (`<scenario>/replay.override.json`: a `ReplayEntry[]`) that REPLACES the derived script.
+Two failure modes are not reconstructable from `assistant/chunk` alone — a pure throw before any chunk (e.g. an HTTP 401, where the log holds only a `turn/end {error}` and no chunks) and a cancel/hang (timing, not chunk content). A scenario that needs those supplies an optional sidecar (`<scenario>/replay.override.json`: a `ReplayEntry[]`) that REPLACES the derived script. A `hang` entry may name `readyFile`; replay writes that empty marker after its prefix chunks reach the loop and before it waits for cancellation, so an external driver can cancel deterministically without observing a presentation update.
 
 ## Nested agents: per-session keying
 
diff --git a/packages/support/llm-replay/src/index.ts b/packages/support/llm-replay/src/index.ts
index ca4511db8a..cd1993b1e2 100644
--- a/packages/support/llm-replay/src/index.ts
+++ b/packages/support/llm-replay/src/index.ts
@@ -6,7 +6,7 @@
  * @module @deepseek-ai/dsh-llm-replay
  */
 
-import { existsSync, readFileSync } from 'node:fs'
+import { existsSync, readFileSync, writeFileSync } from 'node:fs'
 import { delimiter as pathDelimiter } from 'node:path'
 import type { Context } from 'cordis'
 import { decodeStorageRecord } from '@deepseek-ai/dsh-session'
@@ -22,7 +22,11 @@ import { LlmAdapter, LlmError, assertNever } from '@deepseek-ai/dsh-llm'
 export type ReplayEntry =
   | { kind: 'chunks'; chunks: StreamChunk[] }
   | { kind: 'throw'; chunks: StreamChunk[]; message: string; code: string }
-  | { kind: 'hang' }
+  | {
+    kind: 'hang'
+    /** Optional marker written after the prefix chunks are consumed and before the stream waits for cancellation. */
+    readyFile?: string
+  }
 
 /** One model exposed by a replay-only provider catalog. */
 export interface ReplayModelConfig {
@@ -42,7 +46,7 @@ export interface ReplayProviderConfig {
   id: string
   /** Selector label; defaults to {@link id}. */
   name?: string
-  /** Advisory models exposed to clients such as ACP editors. */
+  /** Advisory models exposed to replay scenarios that exercise discovery. */
   models?: ReplayModelConfig[]
 }
 
@@ -301,6 +305,7 @@ async function* replayEntry(entry: ReplayEntry, signal: AbortSignal | undefined)
       // chunk, then wait for abort and surface it as the consumer expects.
       yield { type: 'block-start', index: 0, blockType: 'text' }
       yield { type: 'text-delta', index: 0, text: 'partial' }
+      if (entry.readyFile !== undefined) writeFileSync(entry.readyFile, '')
       await new Promise<void>((_resolve, reject) => {
         if (signal?.aborted) { reject(new Error('aborted')); return }
         signal?.addEventListener('abort', () => { reject(new Error('aborted')) }, { once: true })
diff --git a/packages/support/llm-replay/tests/llm-replay.spec.ts b/packages/support/llm-replay/tests/llm-replay.spec.ts
index 14086db27f..645b655445 100644
--- a/packages/support/llm-replay/tests/llm-replay.spec.ts
+++ b/packages/support/llm-replay/tests/llm-replay.spec.ts
@@ -1,4 +1,4 @@
-import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { existsSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import { afterEach, beforeEach, describe, expect, it } from 'vitest'
@@ -379,7 +379,8 @@ describe('installLlmReplay (through the real LlmService)', () => {
   it('rejects a hang entry when the signal fires DURING the wait (abort listener path)', async () => {
     writeFileSync(file, sessionJsonl([]), 'utf8')
     const overrideFile = join(dir, 'replay.override.json')
-    writeFileSync(overrideFile, JSON.stringify([{ kind: 'hang' }]), 'utf8')
+    const readyFile = join(dir, 'stream-ready')
+    writeFileSync(overrideFile, JSON.stringify([{ kind: 'hang', readyFile }]), 'utf8')
     const ctx = new Context()
     await ctx.plugin(LlmService)
     installLlmReplay(ctx, { file, overrideFile })
@@ -392,6 +393,7 @@ describe('installLlmReplay (through the real LlmService)', () => {
     expect((await iterator.next()).value).toMatchObject({ type: 'text-delta' })
     const pending = iterator.next()
     await new Promise(r => setImmediate(r))
+    expect(existsSync(readyFile)).toBe(true)
     controller.abort()
     await expect(pending).rejects.toThrow('aborted')
   })
diff --git a/packages/tasks/tool-tasks/README.md b/packages/tasks/tool-tasks/README.md
index a103640cd5..d471e709bc 100644
--- a/packages/tasks/tool-tasks/README.md
+++ b/packages/tasks/tool-tasks/README.md
@@ -8,7 +8,7 @@ The model-facing control surface for `ctx.tasks`: three kind-independent tools,
 - `task_list()` returns caller-visible tasks as `<id> [<kind>] <status> — <label>`.
 - `task_kill(task_id, reason?)` requests cancellation immediately and forwards the logged reason. Terminal tasks return a non-consuming snapshot.
 
-All three use generic ACP cards: `read` for output and list, `execute` for kill.
+All three use generic UI cards: `read` for output and list, `execute` for kill.
 
 Their canonical values are `{ text, task }`, `PublicTaskSnapshot[]`, and `{ outcome: 'cancellation-requested' | 'already-finished', task }`. A public snapshot carries id, kind, label, status/detail, and start/finish times; it deliberately omits `ownerSession` and the internal `reported` notice bit. Native renderers preserve the status and acknowledgement text above.
 
diff --git a/packages/todo/README.md b/packages/todo/README.md
index c19fab82d3..a2dfa2549d 100644
--- a/packages/todo/README.md
+++ b/packages/todo/README.md
@@ -6,4 +6,4 @@ The model-facing todo tool. A single **product** package — there is no interfa
 |---|---|---|
 | `tool-todo/` | Model-facing `todo_write` tool; writes the whole list to the session log (`todo/write`) | (registers on `ctx.tools`) |
 
-The list lives on the event-sourced session log (`SessionEventMap['todo/write']`, owned by [`dsh-session`](../core/session)); this package is the thin consumer that appends the snapshot. UIs render off `session/event`: the [TUI app](../examples/tui-demo) shows a persistent plan, while the [ACP bridge](../ui/acp) maps it to a `plan` sessionUpdate.
+The list lives on the event-sourced session log (`SessionEventMap['todo/write']`, owned by [`dsh-session`](../core/session)); this package is the thin consumer that appends the snapshot. UIs such as the [TUI app](../examples/tui-demo) and the host/client runtime render the durable list from session events.
diff --git a/packages/todo/tool-todo/README.md b/packages/todo/tool-todo/README.md
index febb2c9ce0..330f816027 100644
--- a/packages/todo/tool-todo/README.md
+++ b/packages/todo/tool-todo/README.md
@@ -6,7 +6,7 @@ The model-facing `todo_write` tool: the agent's whole task list, replaced wholes
 
 Registers one tool, `todo_write(todos: [{ content, status }])`, on `ctx.tools`. The model sends the ENTIRE list every call — there are no partial updates or per-item edits. Each call appends a `todo/write` event (the full list snapshot) to the calling agent's session log via `agent.session.append('todo/write', { todos })`; the current list is the most recent such event (last-write-wins on replay).
 
-`status` is one of `pending`, `in_progress`, `completed` — exactly the ACP `PlanEntryStatus` triple.
+`status` is one of `pending`, `in_progress`, or `completed`.
 
 ## Single owner
 
@@ -18,7 +18,7 @@ Beyond the schema's type/required/enum checks, `execute` rejects an empty or dup
 
 ## Rendering
 
-The canonical result is `{ todos, counts: { pending, inProgress, completed } }`; its Native renderer returns the compact update acknowledgement. The tool also writes the full `todo/write` session event. UIs subscribe to `session/event` and render that durable list themselves: the [TUI app](../../examples/tui-demo) shows a persistent plan, and the [ACP bridge](../../ui/acp) maps the list to a `plan` sessionUpdate (synthesizing the `priority` ACP requires).
+The canonical result is `{ todos, counts: { pending, inProgress, completed } }`; its Native renderer returns the compact update acknowledgement. The tool also writes the full `todo/write` session event. UIs subscribe to the event stream and render that durable list themselves; the [TUI app](../../examples/tui-demo) shows it as a persistent plan.
 
 ## Export shape
 
@@ -57,5 +57,5 @@ Append-only; newly visible content follows the reusable request prefix and does
 ## Known Limitations and Deferred Work
 
 - **Single-owner scope only** — the list belongs to the one calling agent session; subagent/shared/swarm scopes are a deliberate cut (see § Single owner), and a non-agent caller is rejected.
-- **The item shape is deliberately minimal** — `content` plus three-state `status`; no id, priority, or active-form fields, and the ACP bridge synthesizes the `priority` ACP requires.
+- **The item shape is deliberately minimal** — `content` plus three-state `status`; whole-list replacement needs no stable id, priority, or active-form fields.
 - **Whole-list replacement is the only operation** — no partial updates, no read-back tool; the model must resend the entire list each call.
diff --git a/packages/ui/README.md b/packages/ui/README.md
index f8e4704f20..0367223a24 100644
--- a/packages/ui/README.md
+++ b/packages/ui/README.md
@@ -1,10 +1,9 @@
-# ui/ — editor/client integration surfaces
+# ui/ — human and SDK-client integration surfaces
 
-Integrations that expose the agent to an external editor or client. These are **product** packages: a real surface a user drives the harness through.
+Human-facing channels and the out-of-process SDK server. These are **product** packages: real interfaces that a person or SDK client drives.
 
 | Package | Role | ctx key |
 |---|---|---|
-| `acp/` | Agent Client Protocol bridge: serves agents, commands, and live/replayed title updates to an ACP editor over JSON-RPC stdio | (drives `ctx.agents`/`ctx.sessions`) |
 | `commands/` | Human-command registry: shared discovery metadata, scoped shadowing, cancellation, and direct UI dispatch | `ctx.commands` |
 | `user-approval/` | One-shot user-approval mechanism, closed outcome vocabulary, audit events, and per-session approval policy | `ctx.approval` |
 | `permission/` | User-facing permission presets (`workspace-write`/`danger-full-access`): one product-level select bundling the sandbox-mode and approval-policy knobs, written through to their session events | `ctx.permission` |
@@ -14,8 +13,8 @@ Integrations that expose the agent to an external editor or client. These are **
 | `jsonrpc/` | Stdio JSON-RPC server for out-of-process SDK clients | (drives `ctx.agents`) |
 | `app-boot/` | Shared boot glue for the app bins: `.env` loading, fail-loud Loader guards, snapshot-aware config resolution, the settle-the-tree boot sequence | (library for the bins) |
 
-A UI integration is a client-driver plugin, not a loop change: it consumes the existing `agent/*` event taxonomy and the `dsh-agent` factory. The `jsonrpc` plugin is the SDK-client sibling of the `acp` bridge (a JSON-RPC server over `ctx.agents` for out-of-process SDK clients rather than editors). [`tui`](tui/README.md) is the interactive terminal front door and supplies the terminal-local `ctx.tui` extension service; non-interactive tasks use the headless `cli-demo` app instead of a UI channel. [`commands`](commands/README.md) is the human-only discovery and dispatch plane shared by TUI and ACP; command input and output do not become model messages.
+A UI integration is a client-driver plugin, not a loop change: it consumes the existing `agent/*` event taxonomy and the `dsh-agent` factory. [`tui`](tui/README.md) is the interactive terminal front door and supplies the terminal-local `ctx.tui` extension service; [`jsonrpc`](jsonrpc/README.md) serves out-of-process SDK clients, while non-interactive one-shot tasks use `cli-demo`. [`commands`](commands/README.md) is the human-only discovery and dispatch plane consumed by TUI; command input and output do not become model messages.
 
-`user-approval`, `user-interaction`, and `tool-ask-user` live here because asking a human is a UI-backed product affordance, not part of the providerless core spine. `user-approval` owns the one-shot `ctx.approval` decision mechanism and its policy tier; answerers remain with their UI channel owners. `user-interaction` remains provider-neutral (`ctx.userInteraction`), while `tool-ask-user` is its model-facing consumer and the app/bridge packages provide concrete providers.
+`user-approval`, `user-interaction`, and `tool-ask-user` live here because asking a human is a UI-backed product affordance, not part of the providerless core spine. `user-approval` owns the one-shot `ctx.approval` decision mechanism and its policy tier; answerers remain with the channel or automation transport that owns the agent. `user-interaction` remains provider-neutral (`ctx.userInteraction`), while `tool-ask-user` is its model-facing consumer and interactive app packages provide concrete providers.
 
-The runnable app bundles that bake these bridges into boot bins — the TUI app, ACP server app, and JSON-RPC SDK-runtime bin — live in [`examples/`](../examples/README.md) (`tui-demo`, `acp-demo`, `jsonrpc-demo`), each composed over the [`agent-spine-demo`](../examples/agent-spine-demo/README.md) bundle. `ui/` keeps the reusable bridge/channel plugins and the `app-boot` glue; each front door owns its stdout policy, and a leaf `cordis.yml` supplies backends and optional tools.
+The runnable app bundles that bake these interfaces into boot bins live in [`examples/`](../examples/README.md), composed over [`agent-spine-demo`](../examples/agent-spine-demo/README.md). `ui/` keeps the reusable human/SDK channel plugins and shared `app-boot` glue; the automation-only ACP transport lives in [`acp/`](../acp/README.md). Each front door owns its stdout policy, and a leaf `cordis.yml` supplies backends and optional tools.
diff --git a/packages/ui/acp/README.md b/packages/ui/acp/README.md
deleted file mode 100644
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-# @deepseek-ai/dsh-acp
-
-Agent Client Protocol bridge over JSON-RPC stdio. Editors can create or resume agents, stream their events, answer questions and approvals, and render tool calls. One connection supports multiple isolated sessions; Zed is the primary compatibility target.
-
-It is a **client-driver / UI plugin**, the structured analogue of the terminal `dsh-tui` channel — NOT a loop change and NOT a [capability seam](../../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md). It consumes the existing `agent/*` event taxonomy, the `dsh-agent` create/resume factory, and `dsh-session-persistence`.
-
-## Service / plugin
-
-`apply(ctx, config)` — wires an `AgentSideConnection` (from `@agentclientprotocol/sdk`) to `process.stdin`/`process.stdout` and implements the ACP `Agent` method surface.
-
-The plugin injects `agents`, [`commands`](../commands/README.md), `sessionPersistence`, `sessionQuery`, `tools`, `userInteraction`, `llm`, and `systemPrompt`, never the concrete loop. Persistence backs `session/load`; live-preferred session queries back `session/list`; the command registry backs slash discovery and direct dispatch; the LLM catalog backs model selection; prompt assembly keeps model variables aligned with routing; tool definitions own presentation; user interaction maps agent questions to ACP forms.
-
-### Config
-
-| Key | Default | Meaning |
-|---|---|---|
-| `provider` | — | Initial provider route for created agents (must have a registered adapter). |
-| `model` | — | Initial model id for created agents. |
-
-(No persona key: `dsh-system-prompt`'s own `persona` config supplies the global default section, so ACP-created agents render it without the bridge carrying prompt text. An agent-scoped same-name section may still shadow that default.)
-
-The `initialize` handshake reports a fixed server identity (`agentInfo: { name: 'deepseek-harness-acp', version: '0.0.1' }`) — branding is a literal at the `initialize` site, not config.
-
-## ACP method mapping
-
-| ACP method | Harness seam | Notes |
-|---|---|---|
-| `initialize` | static | negotiate `protocolVersion`; advertise baseline prompt capabilities (`text`, plus `resource_link` rendered as text), `loadSession: true`, and `sessionCapabilities.list` |
-| `session/new` | `ctx.agents.create({ sessionId, meta:{cwd} })` | creates a new session/agent; N concurrent sessions are allowed, keyed by id; advertises the effective command snapshot; `cwd` must be absolute (it becomes the session's workspace — see Per-session cwd); non-empty `additionalDirectories` and `mcpServers` rejected |
-| `session/load` | `ctx.agents.resume(...)` | reserves the id, verifies the persisted cwd, resumes, replays user, assistant, tool, and title events, and re-advertises commands |
-| `session/list` | `ctx.sessionQuery` | returns live-preferred newest-first sessions with absolute cwd and optional folded title; supports exact normalized cwd filtering, returns no cursor, and rejects supplied cursors |
-| `session/prompt` | `ctx.commands.execute()` or `agent.send()` | a flattened prompt beginning with `/` stays in the direct command plane; ordinary prompts support ACP `text` and `resource_link`; `dsh-session:` links and inline mentions are snapshotted through optional `ctx.sessionReferences` before enqueue; unsupported content, unavailable reference capability, failed snapshots, and empty prompts are rejected; one request is in flight per session and settles on the owning turn's end, with an error turn rejecting the RPC |
-| `session/cancel` | command `AbortSignal` or `agent.cancel()` | aborts the exact direct command, or applies the queue-aware agent cancel and settles its prompt `cancelled`; one session never cancels another |
-| `session/update` | `session/event` | streams user replay, assistant text/reasoning, retry/failure attempt markers, tool render intents, and `session_info_update` title revisions |
-| `elicitation/create` | `ctx.userInteraction.ask()` | maps `ask_user_question` questions to ACP form elicitations; option descriptions are shown in enum titles, `multi_select` uses ACP array enums, optionless requests use a required `custom` field, and a non-empty custom answer overrides any selected choice |
-| `session/request_permission` | `approval/request` listener | answers one-shot allow/reject requests for bridge-owned calls; foreign or call-less requests delegate and fail closed if unanswered — see "Permission prompts" |
-| `session/set_config_option` | agent-scoped request target / `ctx.permission.set()` | per-session provider+model and permission-preset switching over [session config options](https://agentclientprotocol.com/protocol/session-config-options) — see "Session config options" |
-
-## Multi-session
-
-One id-keyed record map plus exact agent-object checks route every event, prompt, cancel, and approval to one session. Each session permits one in-flight prompt or reference-preparation operation; `session/cancel` aborts preparation before it can enqueue. Teardown drains all sessions in parallel. See the [multi-session Agent Note](../../../.agents/notes/implemented/feature/2026-06-14-acp-multi-session.md).
-
-## Human commands
-
-After `session/new` and `session/load`, the bridge emits ACP's full `available_commands_update` snapshot for that exact agent. A new session's server-generated id is introduced by the RPC response before its snapshot enters the connection write queue. A global or scoped registry change refreshes every live session from its independently resolved view, so clients replace rather than merge cached catalogs. Names omit the slash; descriptions and optional unstructured-input hints map directly to ACP `AvailableCommand`.
-
-ACP v1 permits a command prompt to carry additional content blocks. The bridge applies its ordinary lossless flattening for supported `text` and `resource_link` blocks, then dispatches when the result begins with `/`. Known commands execute without a model request. Unknown or malformed slash input returns a direct error instead of falling back to the model; prefix whitespace when literal slash-leading text must reach the model. Expected handler errors, thrown failures, and successful text stream as UI-only `agent_message_chunk` output and end the request; cancellation returns `cancelled`. See the [command Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) and the [ACP v1 slash-command contract](https://agentclientprotocol.com/protocol/v1/slash-commands).
-
-## Session config options
-
-The bridge advertises a `model`-category select in `session/new` and `session/load` when the session has a complete target whose provider is registered. Values encode the complete provider/model pair, are grouped by provider when more than one group is available, and come from `ctx.llm.listProviders()` / `listModels()`. The configured or last-requested model is added when absent because catalogs are advisory and private adapters may accept unlisted ids. A selection changes only that ACP session. Agent-scoped prompt assembly snapshots the selected pair for one step, supplies matching `{{provider}}` / `{{model}}` variables, and the `agent/request` waterfall applies the same pair; a concurrent selection therefore takes effect on the next step instead of splitting prompt text from routing. The resulting request header is the durable record restored by `session/load`; a selection never used by a request remains in-memory only.
-
-When `ctx.permission` is composed, the bridge also advertises a `permission` select. Options come from the deployment's preset table; the current value comes from the session fold, with switch-away-only `custom` for unmatched knobs. `session/set_config_option` accepts advertised presets and writes both sandbox-mode and approval-policy events through `PermissionService.set()`. Open-turn switches append immediately; idle switches overlay responses and anchor at the next `agent/prompt-submit`, before request assembly. A crash before anchoring restores the durable fold. See the [model-catalog Agent Note](../../../.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.md), [sandbox Agent Note](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md), [`dsh-permission`](../permission/README.md), and [protocol matrix](acp-feature-support.md#6-session-modes--config-options--models).
-
-The shared [`ctx.tasks` runtime](../../tasks/tasks/) fences access to predictable task ids by the owning session; ACP sessions therefore cannot read or stop one another's background work.
-
-ACP updates are append-only, so `llm/retry` emits a visible separator that marks preceding partial model output discarded before the next attempt streams. A terminal model-request failure emits the same discarded-output warning; replay derives both markers from the durable events.
-
-A log-only `session/title` event maps to ACP `session_info_update` with `title` and the event timestamp as `updatedAt`. The same mapping runs for live events and `session/load` replay, so an asynchronously generated late title and a restored persisted title have one wire representation without entering model history.
-
-`session/list` returns the same latest folded title in standard `SessionInfo.title`. When `ctx.sessionReferences` is mounted, each listed item also carries `_meta["deepseek-harness/sessionReference"].uri`; a title-aware client can render `title ?? sessionId` in its `@` picker and submit that URI as a `resource_link` with the same display name. Sessions without cwd are omitted because ACP requires an absolute `SessionInfo.cwd` and the bridge cannot load them.
-
-## Per-session cwd
-
-`session/new` records the request's absolute cwd in the session header. Before constructing an agent, `session/load` uses persisted metadata to require an absolute request cwd that matches the stored one. Bash defaults to that workspace; an explicit relative workdir resolves against it, and multiple sessions may use different workspaces. `additionalDirectories` remains unsupported.
-
-## Tool-call presentation
-
-Tools return provider-neutral `generic`, `terminal`, or `diff` render intents from `presentCall()` and `presentResult()`. The bridge maps the discriminator to ACP without special-casing tool names and falls back to a generic card. Per-session call-id state supplies result events with their omitted name and arguments during live streaming and replay. File-card titles are relative to the session cwd and use the host separator, while location and diff paths remain raw so the editor opens the real file. See [`dsh-tools`](../../core/tools/README.md#tool-owned-ui-presentation).
-
-## Terminal card (capability-gated)
-
-When the client advertises `_meta.terminal_output`, terminal intents map to Zed's terminal info, output, and exit metadata. The bridge resolves relative cwd against the session and preserves the host filesystem separator, places the description before the terminal block, and omits result content because ACP updates replace call content. Other clients receive a generic card and bridge-derived fenced console fallback. Session creation snapshots the capability so call and result agree. The command still executes through the harness, not ACP terminal creation. See the [terminal-rendering Agent Note](../../../.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md) and [render-intent Agent Note](../../../.agents/notes/implemented/architecture/2026-07-02-tool-render-intent-union.md).
-
-## Settle-exactly-once
-
-A prompt captures its owning turn and settles exactly once from the matching durable `turn/end`, even if presentation failed. Turn correlation excludes stale endings. Error turns reject with an ACP internal error; empty prompts reject before enqueue.
-
-## Permission prompts
-
-For a bridge-owned call, the [approval seam](../user-approval/README.md) maps `ask` to an editor prompt with one-shot allow/reject options. Foreign or call-less requests delegate; unknown choices never grant, cancellation stays cancellation, and transport failure becomes fail-closed unavailability. Whether a tool asks remains policy outside the bridge.
-
-## Disposal & disconnect
-
-Disposal and client disconnect share one memoized teardown. It cancels pending prompts and disposes all owned agent handles in parallel, waiting for loop exit and final flush before registry removal. Mid-turn teardown records `disposed`; `session/cancel` records `aborted`.
-
-## stdout is the protocol
-
-The JSON-RPC frames go on stdout, so this plugin MUST run in an example that loads **no stdout logger** (the console logger writes to stdout and would corrupt the frames). The guarantee is config-only — see `examples/acp-agent` (no console logger) and [ACP support risks](../../../.agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.md#risks). A stderr exporter is fine for logging.
-
-## Running
-
-`pnpm --dir /path/to/deepseek-harness run demo:acp` boots `examples/acp-agent` (needs `DEEPSEEK_API_KEY`). Point an ACP client at it; for Zed, add to `agent_servers`:
-
-```json
-{
-  "agent_servers": {
-    "DeepSeek Harness": {
-      "command": "pnpm",
-      "args": ["--dir", "/path/to/deepseek-harness", "run", "demo:acp"]
-    }
-  }
-}
-```
-
-## Model Experience
-
-### User messages
-
-#### What the model sees
-
-Each ACP `session/prompt` becomes an agent user message: text passes through verbatim and each ordinary `resource_link` becomes exactly a leading newline, `[resource_link name=<JSON-string> uri=<JSON-string>]`, and a trailing newline. When `ctx.sessionReferences` is mounted, a `resource_link` whose URI uses `dsh-session:` or an inline canonical mention becomes readable `@label` text plus one durable untrusted snapshot context; without the capability it is rejected. Unsupported image, audio, and embedded-resource blocks are rejected rather than silently omitted.
-
-#### Token effect
-
-Prompt tokens are data-dependent and remain in that session's history until compaction. Concurrent ACP sessions keep separate contexts.
-
-#### KV Cache effect
-
-Append-only; newly visible content follows the reusable request prefix and does not invalidate existing KV-cache entries.
-
-### Human commands
-
-#### What the model sees
-
-Nothing from command discovery, slash input, or command output. A command handler may separately mutate a durable domain whose later state affects model requests.
-
-#### Token effect
-
-Direct dispatch adds no model tokens and no session message. The mutated domain owns any later prompt or history cost.
-
-#### KV Cache effect
-
-Command discovery, dispatch, and direct output never enter a model request and do not affect its cache. A mutated domain owns any later cache effect.
-
-### Human answers and permission decisions
-
-#### What the model sees
-
-When optional consumers are loaded, ACP form answers become the exact JSON shape documented by `dsh-tool-ask-user`. Failures become `Error: ACP user questions must come from an agent-owned request`, `Error: ACP user question has no matching session`, `Error: ACP elicitation request failed`, `Error: ask_user_question was cancelled by the user`, `Error: ask_user_question returned no answer`, or `Error: ask_user_question was aborted before the user answered`. Permission decisions control whether another tool yields success or denial. ACP tool cards, terminal output, diffs, title updates, and other streamed session updates are UI-only.
-
-#### Token effect
-
-Answer, error, and denial text enters context only through the owning tool result; presentation metadata adds zero model tokens. A replacement `tool/result` still changes the model-facing session surface, but live and replayed ACP feeds ignore it as an execution update so the original terminal or diff completion is not overwritten.
-
-#### KV Cache effect
-
-Append-only; newly visible content follows the reusable request prefix and does not invalidate existing KV-cache entries.
-
-### Permission preset switches
-
-#### What the model sees
-
-`session/set_config_option` emits no model message itself. When `dsh-permission` is composed, the bridge writes the selected preset through that service; the resulting model-visible policy prompt and change notice belong to [`dsh-user-approval`](../user-approval/README.md), while sandbox-mode effects belong to [`dsh-tool-bash`](../../bash/tool-bash/README.md). The ACP `Permissions` select, its option descriptions, pending idle value, and refreshed config response remain client-only.
-
-#### Token effect
-
-Zero direct tokens from the ACP option or the log-only `permission/preset` event. Downstream cost is limited to the owning plugins' policy prompt, conditional retained change notice, and any changed tool outcome.
-
-#### KV Cache effect
-
-The ACP option and log event cause no direct invalidation. The downstream policy-prompt change may invalidate reuse from that system section, while its change notice appends to history.
-
-### Model switches
-
-#### What the model sees
-
-The ACP selector itself emits no message. The selected provider/model pair supplies the next step's `{{provider}}` / `{{model}}` prompt variables and request routing together; all other call-config fields continue through the `agent/request` waterfall unchanged.
-
-#### Token effect
-
-The selector adds no direct tokens. A changed model may tokenize the same retained prompt/history differently, and any persona text that interpolates provider or model changes accordingly.
-
-#### KV Cache effect
-
-Switching provider or model selects a different cache domain. If the persona interpolates either value, the rendered system prompt also changes and prevents reuse from its first changed token.
-
-### Loaded sessions
-
-#### What the model sees
-
-`session/load` resumes the persisted log, after which the loop sends its reconstructed history and request header. Replaying that log to the editor is not an extra model message.
-
-#### Token effect
-
-Restored context has the persistence and session packages' normal retained cost; ACP replay to the client adds none.
-
-#### KV Cache effect
-
-Loading does not rewrite the stored log, but the next request is reconstructed under the current envelope and route. Reuse requires that reconstruction to match; ACP replay to the client has no cache effect.
-
-## Known Limitations and Deferred Work
-
-- **`additionalDirectories`** — rejected. A session operates in its single `cwd` (see Per-session cwd); widening the tool/filesystem scope to extra roots is a separate sandbox concern, not yet implemented.
-- **Prompt content is `text` + `resource_link` only** — image, audio, and embedded-resource blocks are rejected, as is a non-empty `mcpServers` list at `session/new`.
-- **Session picker UI is client-owned** — `session/list` supplies standard title metadata and, when references are available, a canonical URI extension; an ACP client must consume those fields to add an `@` picker. Title/body search remains future metadata or FTS work.
-- **Terminal cards render completed output** — live incremental streaming and command classification are named follow-ups of [the terminal-rendering Agent Note](../../../.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md).
-- **Permission answers are one-shot only** — the bridge offers `allow_once` / `reject_once`; durable `allow_always` grants and their storage/revocation policy remain deferred to the approval seam.
-- **Command output is live-only** — discovery is refreshed after load, but direct command results are not persisted or replayed into a reconnected editor.
diff --git a/packages/ui/acp/acp-feature-support.md b/packages/ui/acp/acp-feature-support.md
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-# ACP feature support checklist
-
-A structured inventory of [Agent Client Protocol](https://agentclientprotocol.com) (ACP) features and where the harness's ACP bridge ([`@deepseek-ai/dsh-acp`](README.md)) stands on each. The bridge exposes the harness agent as an ACP **server** (the agent side of an editor↔agent connection), so "supported" below means *the bridge implements the agent's half* — answering an agent method, advertising a capability, or calling a client method.
-
-## Scope
-
-This tracks the **stable** ACP v1 surface (schema `1.14.0`, `schema/v1/schema.json`) PLUS the **unstable/draft** features that the two reference adapters — [`claude-agent-acp`](https://github.com/zed-industries/claude-code-acp) (Claude Code) and [`codex-acp`](https://github.com/zed-industries/codex-acp) (OpenAI Codex) — actually ship. A purely-unstable feature that neither reference adapter uses is omitted (see [Out of scope](#out-of-scope)).
-
-Legend: ✅ supported · ⚠️ partial / fallback · ❌ not yet · — n/a. The **Stable** column marks whether the feature is in the released v1 schema (S) or only the unstable schema (U). The **Claude** / **Codex** columns record whether each reference adapter ships it, as a maturity signal.
-
-## At a glance
-
-The bridge implements the **core prompt-turn loop** for N concurrent sessions: initialize, session new/load/list, prompt, cancel, streamed assistant/thought chunks, tool-call rendering (including Zed terminal cards), resumable session replay, slash commands, one-shot permission prompts, per-session model selection and permission presets, and **session modes** (the picker, via `@deepseek-ai/dsh-plan-mode`). The largest **unbuilt** areas are **MCP passthrough** and **agent plans**, plus the client **filesystem** and **terminal** method families (which the adapters mostly do NOT drive either — see rows 43-49). See [Gap summary](#gap-summary).
-
-## 1. Agent methods (client → agent)
-
-| Method | Stable | Bridge | Claude | Codex | Notes |
-|---|---|---|---|---|---|
-| `initialize` | S | ✅ | ✅ | ✅ | Negotiates `PROTOCOL_VERSION`; advertises `loadSession`, `sessionCapabilities.list`, and baseline prompt caps. Snapshots the Zed `_meta.terminal_output` client cap. |
-| `authenticate` | S | ⚠️ | ✅ | ✅ | No-op stub; the bridge advertises no `authMethods`, so there is nothing to authenticate. |
-| `logout` | S | ❌ | ✅ | ✅ | Gated by `agentCapabilities.auth.logout`; not advertised. |
-| `session/new` | S | ✅ | ✅ | ✅ | Maps to `agents.create`; requires an absolute `cwd` (becomes the session workspace); rejects non-empty `additionalDirectories` / `mcpServers`. |
-| `session/load` | S | ✅ | ✅ | ✅ | Maps to `agents.resume` + full event-log replay; validates persisted `cwd` before constructing the agent. |
-| `session/resume` | S | ❌ | ✅ | ✅ | Reconnect WITHOUT replay; gated by `sessionCapabilities.resume`. Not advertised. |
-| `session/close` | S | ❌ | ✅ | ✅ | No `session/close` handler — the SDK dispatch returns `method_not_found`. The bridge tears sessions down on client disconnect / Cordis disposal (cross-cutting, see [§8](#8-cross-cutting)), but that is not the on-demand per-session method. |
-| `session/prompt` | S | ✅ | ✅ | ✅ | A flattened prompt beginning with `/` dispatches through `ctx.commands` without a model request; ordinary input maps to `agent.send`. One request is in flight per session. |
-| `session/cancel` | S | ✅ | ✅ | ✅ | Aborts the exact direct command, or applies queue-aware `agent.cancel` and settles its prompt `cancelled`, scoped to one session. |
-| `session/set_mode` | S | ✅ | ✅ | ✅ | Composed opportunistically: with `@deepseek-ai/dsh-plan-mode` mounted, `session/new`/`session/load` advertise the fixed `default` / `plan` projection and `session/set_mode` records the boolean pending intent (optimistic `current_mode_update`; logged `plan/mode` lands at the turn boundary). Without the plugin: no `modes` advertised, `set_mode` rejected (see [§6 Modes](#6-session-modes--config-options--models)). |
-| `session/set_config_option` | S | ✅ | ✅ | ✅ | A provider/model select is present for a complete registered target; one `permission` select is added when `ctx.permission` is composed. Every response carries the complete refreshed state. |
-| model selection | S | ✅ | ✅ | ✅ | No distinct stable `session/set_model` — model is the `model`-category `session/set_config_option`. Values preserve the provider/model pair, catalogs come from `ctx.llm`, selection is per session, and `session/load` restores the last requested pair. Codex also supports the legacy `unstable_setSessionModel` ext method. |
-| `session/list` | S | ✅ | ✅ | ✅ | Uses live-preferred `ctx.sessionQuery`; returns absolute-cwd sessions newest-first with optional folded title and exact cwd filtering. Pagination is not emitted; supplied cursors are rejected. |
-| `session/delete` | S | ❌ | ✅ | ✅ | Gated by `sessionCapabilities.delete`. |
-| `session/fork` | U | ❌ | ✅ | ❌ | Claude ships `unstable_forkSession`; Codex does not. |
-
-## 2. Client methods the agent CALLS (agent → client)
-
-These are capabilities the bridge would *drive* on the editor. The harness runs tools in-process (its own `dsh-bash` executor, direct file I/O), so it does not yet delegate to the editor for any of these.
-
-| Method | Stable | Bridge | Claude | Codex | Notes |
-|---|---|---|---|---|---|
-| `session/update` | S | ✅ | ✅ | ✅ | The bridge's primary output channel (see [§4](#4-sessionupdate-variants)). |
-| `session/request_permission` | S | ✅ | ✅ | ✅ | The bridge answers the [`ctx.approval`](../user-approval/README.md) seam for the agents it owns: an `ask` from a hook/plugin becomes an editor prompt attached to the streamed tool call, one-shot `allow_once`/`reject_once` options only. Whether a call asks is policy (nothing asks by default); `allow_always` is deferred (grant storage). |
-| `fs/read_text_file` | S | ❌ | ✅ | ❌ | The harness reads files directly (it does not see the editor's unsaved buffer state). Claude delegates; Codex does not. |
-| `fs/write_text_file` | S | ❌ | ✅ | ❌ | Same — direct writes, no editor delegation. |
-| `terminal/create` | S | ❌ | ❌ | ❌ | Neither reference adapter drives the client terminal API either — both, like the bridge, render shell output as tool-call content + a `_meta` channel (see [§5 Terminal](#terminal-rendering)). |
-| `terminal/output` | S | ❌ | ❌ | ❌ | As above. |
-| `terminal/wait_for_exit` | S | ❌ | ❌ | ❌ | As above. |
-| `terminal/kill` | S | ❌ | ❌ | ❌ | As above. |
-| `terminal/release` | S | ❌ | ❌ | ❌ | As above. |
-| `elicitation/create` · `elicitation/complete` | U | ⚠️ | ✅ | ⚠️ | The bridge drives `unstable_createElicitation` for `ask_user_question` form prompts (session-scoped, no URL-mode flow yet). Claude calls the `unstable_*` elicitation methods for MCP server elicitations; Codex maps elicitations onto `session/request_permission`. |
-
-## 3. Capabilities
-
-### 3a. `agentCapabilities` (advertised by the bridge)
-
-| Capability | Stable | Bridge | Claude | Codex | Notes |
-|---|---|---|---|---|---|
-| `loadSession` | S | ✅ | ✅ | ✅ | Advertised `true`; backs `session/load`. |
-| `promptCapabilities.image` | S | ❌ | ✅ | ✅ | Bridge advertises `image: false`; image prompt blocks are rejected. |
-| `promptCapabilities.audio` | S | ❌ | ❌ | ❌ | `audio: false`; neither adapter accepts audio either. |
-| `promptCapabilities.embeddedContext` | S | ❌ | ✅ | ✅ | `embeddedContext: false`; embedded `resource` blocks rejected. |
-| `mcpCapabilities.{http,sse}` | S | ❌ | ✅ | ⚠️ | No MCP passthrough; `mcpServers` is rejected. Claude advertises http+sse, Codex http only. |
-| `sessionCapabilities.*` | S | ⚠️ | ✅ | ✅ | `list` is advertised; delete/resume/close/additionalDirectories/fork remain off. |
-| `auth.logout` | S | ❌ | ✅ | ✅ | Not advertised. |
-| `authMethods[]` | S | ⚠️ | ✅ | ✅ | Advertised as empty (no auth required to reach the model). |
-| `agentInfo` (name/version) | S | ✅ | ✅ | ✅ | Fixed literals: `deepseek-harness-acp` / `0.0.1` (not config). |
-| `_meta` custom caps | S | ❌ | ✅ | — | E.g. Claude's `claudeCode.promptQueueing`. The bridge advertises no custom `_meta`. |
-
-### 3b. `clientCapabilities` (consumed by the bridge)
-
-| Capability | Stable | Bridge | Notes |
-|---|---|---|---|
-| `fs.{readTextFile,writeTextFile}` | S | ❌ | Not consulted (the bridge never calls `fs/*`). |
-| `terminal` | S | ❌ | Not consulted; the bridge keys terminal rendering off the Zed `_meta.terminal_output` cap instead. |
-| `_meta.terminal_output` (Zed) | S (`_meta`) | ✅ | Snapshotted per session at create/load; gates terminal-card rendering. |
-
-## 4. `session/update` variants
-
-| `sessionUpdate` | Stable | Bridge | Claude | Codex | Notes |
-|---|---|---|---|---|---|
-| `agent_message_chunk` | S | ✅ | ✅ | ✅ | From `assistant/chunk` text-delta. |
-| `agent_thought_chunk` | S | ✅ | ✅ | ✅ | From `assistant/chunk` reasoning-delta. |
-| `user_message_chunk` | S | ✅ | ✅ | ✅ | Emitted during `session/load` replay to reconstruct the user side. |
-| `tool_call` | S | ✅ | ✅ | ✅ | Tool-owned presentation (`presentCall`); see [§5](#5-tool-call-rendering). |
-| `tool_call_update` | S | ✅ | ✅ | ✅ | From appended `tool/result` via `presentResult`; replacement results rewrite model context and do not duplicate or overwrite execution presentation. |
-| `plan` | S | ❌ | ✅ | ✅ | No agent plan emitted. Both adapters emit real plan entries (Codex's `CodexEventHandler.updatePlan` maps `turn/plan/updated` → `{ sessionUpdate: 'plan', entries }`). |
-| `available_commands_update` | S | ✅ | ✅ | ✅ | Full effective snapshot after create/load and registry changes; names, descriptions, and unstructured-input hints come from `ctx.commands`. |
-| `current_mode_update` | S | ✅ | ✅ | ✅ | Echoed optimistically on `session/set_mode` and re-notified when a logged `plan/mode` maps to a different wire id (covers the `exit_plan_mode` tool flipping the session back). |
-| `config_option_update` | S | ❌ | ✅ | ✅ | Config options exist (advertised in `session/new`/`session/load`, switched via `session/set_config_option`), but the bridge never pushes agent-initiated changes — an operator default drift is narrated to the MODEL, not echoed to the editor. Future work in the [sandbox Agent Note § Per-session mode switching](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md). |
-| `usage_update` | S | ❌ | ✅ | ✅ | Token/cost reporting not surfaced (the harness records token usage internally on `assistant/message`). |
-| `session_info_update` | S | ✅ | ⚠️ | ⚠️ | Log-backed title events push title and event time; load replay uses the same mapping. |
-
-## 5. Tool-call rendering
-
-Tool-call presentation is **owned by each tool** (`presentCall` / `presentResult` on the `dsh-tools` definition), not special-cased in the bridge — see the [terminal-and-tool-rendering Agent Note](../../../.agents/notes/implemented/feature/2026-06-18-acp-terminal-and-tool-rendering.md).
-
-| Feature | Stable | Bridge | Claude | Codex | Notes |
-|---|---|---|---|---|---|
-| `ToolCallKind` mapping | S | ✅ | ✅ | ✅ | `execute`/`read`/`edit` declared by each tool's `presentCall`; presenter-less tools render `other` (no name sniffing); richer mapping possible. |
-| `ToolCallStatus` | S | ✅ | ✅ | ✅ | `in_progress` → `completed`/`failed`. |
-| `content` blocks | S | ✅ | ✅ | ✅ | Text content; the description renders above the card. |
-| `diff` content | S | ✅ | ✅ | ✅ | The `write`/`edit` tools declare a `diff` render intent: `presentCall` → a call-time `{ card: 'diff' }` snippet, and `presentResult` → a result-time `{ card: 'diff' }`. For an edit or an overwrite it carries the applied hunk(s) with surrounding context (one per `replace_all` site), computed from the before/after text and persisted on the `tool/result` event as `meta`; for a create (no before-image) it is an args-derived whole-file diff. The bridge emits `{ type: 'diff', path, oldText, newText }` content blocks; a successful mutation ALWAYS returns the result diff (an ACP `tool_call_update.content` replaces the call's content, so the result diff — not the model-facing text — is what survives). |
-| `terminal` content | S | ✅ | ✅ | ✅ | Via the Zed `_meta` terminal convention (see below), not the spec `terminal/*` sub-protocol. |
-| `locations` (follow-along) | S | ✅ | ✅ | ✅ | The `read`/`write`/`edit` tools emit `{ path, line? }` file-location hints via `presentCall`. |
-| `rawInput` | S | ✅ | ⚠️ | ✅ | Parsed tool args surfaced as `rawInput`. |
-| `rawOutput` | S | ❌ | ⚠️ | ✅ | Not emitted. |
-
-### Terminal rendering
-
-⚠️ Implemented via the **Zed `_meta` convention** (`terminal_info` / `terminal_output` / `terminal_exit`), gated on the client advertising `_meta.terminal_output` — NOT the spec's `terminal/create` sub-protocol (which would make the editor execute the command, bypassing `dsh-bash`'s sandbox / env-scrub / ownership / cwd). Both reference adapters take the same `_meta` approach. Live incremental streaming (`terminal_output_delta`, which Codex negotiates) is a follow-up — the bridge currently sends the full captured output once on the result.
-
-## 6. Session modes / config options / models
-
-Session modes ✅ (the [plan-mode Agent Note](../../../.agents/notes/implemented/feature/2026-07-07-plan-mode.md)): ACP owns the fixed `default` / `plan` wire vocabulary and projects it onto `ctx.planMode`'s boolean `{ active, pending? }` state; `session/set_mode` calls `set()` and `current_mode_update` tracks the optimistic selection plus each distinct committed `plan/mode` flip. Config options ✅: the bridge advertises a `model` select from the advisory LLM provider/model catalog, preserving each provider/model pair in an opaque value and grouping multiple providers. A selected pair is isolated to one session, snapshotted with the prompt for each step, applied through `agent/request`, and restored from the logged request header on load. When `ctx.permission` is composed, the bridge also advertises one `permission` select whose values come from the deployment preset table and whose current value derives from the session log; idle permission switches anchor at the next `agent/prompt-submit` inside its open turn. The division is picker-to-collaboration-state / knobs-to-config-options: individual environment knobs and the provider/model selector are not modes. See the [model-catalog Agent Note](../../../.agents/notes/implemented/architecture/2026-07-15-llm-model-catalog-and-acp-selection.md) and [sandbox Agent Note](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md).
-
-## 7. Content blocks
-
-| Block | Stable | In prompts | In updates | Notes |
-|---|---|---|---|---|
-| `text` | S | ✅ | ✅ | Baseline. |
-| `resource_link` | S | ✅ | ⚠️ | Accepted in prompts and rendered into text (`acpPromptToText`); not emitted as a structured update block. |
-| `image` | S | ❌ | ❌ | Rejected in prompts (`promptCapabilities.image: false`). |
-| `audio` | S | ❌ | ❌ | Rejected. |
-| `resource` (embedded) | S | ❌ | ❌ | Rejected (`embeddedContext: false`). |
-
-The bridge rejects unsupported prompt blocks rather than silently dropping them (`promptHasUnsupportedContent`), per the "explicit over implicit" convention.
-
-## 8. Cross-cutting
-
-| Feature | Stable | Bridge | Notes |
-|---|---|---|---|
-| `StopReason` mapping | S | ✅ | `turnEndToStopReason` is total over harness turn-end reasons → `end_turn`/`max_tokens`/`cancelled`. |
-| Multi-session (N per connection) | S | ✅ | Strict per-session demux; concurrent streams never interleave. See the [multi-session Agent Note](../../../.agents/notes/implemented/feature/2026-06-14-acp-multi-session.md). |
-| Disconnect / disposal teardown | S | ✅ | Quiesces every live session on client disconnect or Cordis disposal. |
-| `_meta` extensibility | S | ⚠️ | Consumed for the Zed terminal cap and emitted for terminal cards. Listed sessions add `deepseek-harness/sessionReference` with a canonical URI when cross-session references are mounted. |
-| Background-task ownership isolation | — | ✅ | Generic `task_output`/`task_kill` reject tasks whose branded owner `SessionId` belongs to another session. |
-| stdout-is-the-protocol guarantee | S | ✅ | The bridge runs in an example with no stdout logger. |
-
-## Gap summary
-
-Ranked by how commonly the reference adapters ship them and how much UX they unlock:
-
-1. **Session lifecycle** — `session/delete`, then `session/resume` / `session/close`.
-2. **Agent plan** (`sessionUpdate: 'plan'`) — surface the loop's plan as structured entries.
-3. **MCP passthrough** (`mcpServers` on `session/new` + `mcpCapabilities`).
-4. **Richer prompt content** — image / embedded `resource` blocks (needs a multimodal model path).
-5. **Usage reporting** (`usage_update`) — the harness already records token usage internally (on `assistant/message`).
-6. **Editor filesystem delegation** (`fs/read_text_file` / `fs/write_text_file`) — lets the agent see unsaved buffers; lower priority since the harness has direct disk access.
-
-## Out of scope
-
-Unstable/draft ACP features that **neither** reference adapter ships are not tracked above: `providers/*` (LLM provider selection), `mcp/connect`·`mcp/message`·`mcp/disconnect` (client-side MCP passthrough), `nes/*` (Next Edit Suggestion), `document/did*` (LSP-style document sync), the v2 plan model (`plan_update` / `plan_removed`), boolean config options, `$/cancel_request`, and the draft Streamable-HTTP transport. They can be added if a target editor adopts them.
-
-## Sources
-
-- Stable spec: `schema/v1/schema.json` (schema `1.14.0`) and `docs/protocol/v1/*.mdx` in the [agent-client-protocol](https://github.com/agentclientprotocol/agent-client-protocol) repo.
-- Reference adapters: [`claude-agent-acp`](https://github.com/zed-industries/claude-code-acp) and [`codex-acp`](https://github.com/zed-industries/codex-acp).
-- Bridge: [`README.md`](README.md), [`src/index.ts`](src/index.ts), and the ACP Agent Notes under [`.agents/notes/`](../../../.agents/notes/README.md).
diff --git a/packages/ui/acp/package.json b/packages/ui/acp/package.json
deleted file mode 100644
index 3fb7bd5d28..0000000000
--- a/packages/ui/acp/package.json
+++ /dev/null
@@ -1,86 +0,0 @@
-{
-  "name": "@deepseek-ai/dsh-acp",
-  "description": "Agent Client Protocol (ACP) bridge: drive DeepSeek Harness SDK agents from an ACP editor over JSON-RPC stdio",
-  "version": "0.0.1",
-  "private": true,
-  "type": "module",
-  "main": "lib/index.js",
-  "types": "lib/types/index.d.ts",
-  "exports": {
-    ".": {
-      "types": "./lib/types/index.d.ts",
-      "default": "./lib/index.js"
-    },
-    "./invariant": {
-      "types": "./lib/types/invariant.d.ts",
-      "default": "./lib/invariant.js"
-    },
-    "./src/*": "./src/*",
-    "./package.json": "./package.json"
-  },
-  "files": [
-    "lib/index.js",
-    "lib/invariant.js",
-    "lib/types/**/*.d.ts",
-    "lib/types/**/*.d.ts.map",
-    "src"
-  ],
-  "license": "BSD-3-Clause",
-  "dependencies": {
-    "@agentclientprotocol/sdk": "0.25.1",
-    "schemastery": "^3.17.0",
-    "zod": "^4.0.0"
-  },
-  "peerDependencies": {
-    "@deepseek-ai/dsh-agent": "^0.0.1",
-    "@deepseek-ai/dsh-bash": "^0.0.1",
-    "@deepseek-ai/dsh-commands": "^0.0.1",
-    "@deepseek-ai/dsh-invariants": "^0.0.1",
-    "@deepseek-ai/dsh-llm": "^0.0.1",
-    "@deepseek-ai/dsh-llm-retry": "^0.0.1",
-    "@deepseek-ai/dsh-plan-mode": "^0.0.1",
-    "@deepseek-ai/dsh-permission": "^0.0.1",
-    "@deepseek-ai/dsh-sandbox": "^0.0.1",
-    "@deepseek-ai/dsh-session": "^0.0.1",
-    "@deepseek-ai/dsh-session-reference": "^0.0.1",
-    "@deepseek-ai/dsh-session-query": "^0.0.1",
-    "@deepseek-ai/dsh-session-title": "^0.0.1",
-    "@deepseek-ai/dsh-session-persistence": "^0.0.1",
-    "@deepseek-ai/dsh-system-prompt": "^0.0.1",
-    "@deepseek-ai/dsh-tools": "^0.0.1",
-    "@deepseek-ai/dsh-user-approval": "^0.0.1",
-    "@deepseek-ai/dsh-user-interaction": "^0.0.1",
-    "cordis": "^4.0.0-rc.7"
-  },
-  "devDependencies": {
-    "@deepseek-ai/dsh-agent": "workspace:^",
-    "@deepseek-ai/dsh-agent-loop": "workspace:^",
-    "@deepseek-ai/dsh-agent-loop-testkit": "workspace:^",
-    "@deepseek-ai/dsh-bash": "workspace:^",
-    "@deepseek-ai/dsh-bash-local": "workspace:^",
-    "@deepseek-ai/dsh-commands": "workspace:^",
-    "@deepseek-ai/dsh-fs-local": "workspace:^",
-    "@deepseek-ai/dsh-fs-policy": "workspace:^",
-    "@deepseek-ai/dsh-invariants": "workspace:^",
-    "@deepseek-ai/dsh-llm": "workspace:^",
-    "@deepseek-ai/dsh-llm-retry": "workspace:^",
-    "@deepseek-ai/dsh-plan-mode": "workspace:^",
-    "@deepseek-ai/dsh-permission": "workspace:^",
-    "@deepseek-ai/dsh-sandbox": "workspace:^",
-    "@deepseek-ai/dsh-session": "workspace:^",
-    "@deepseek-ai/dsh-session-reference": "workspace:^",
-    "@deepseek-ai/dsh-session-query": "workspace:^",
-    "@deepseek-ai/dsh-session-title": "workspace:^",
-    "@deepseek-ai/dsh-session-persistence": "workspace:^",
-    "@deepseek-ai/dsh-session-persistence-jsonl": "workspace:^",
-    "@deepseek-ai/dsh-system-prompt": "workspace:^",
-    "@deepseek-ai/dsh-tool-ask-user": "workspace:^",
-    "@deepseek-ai/dsh-tool-bash": "workspace:^",
-    "@deepseek-ai/dsh-tool-fs": "workspace:^",
-    "@deepseek-ai/dsh-tool-todo": "workspace:^",
-    "@deepseek-ai/dsh-tools": "workspace:^",
-    "@deepseek-ai/dsh-user-approval": "workspace:^",
-    "@deepseek-ai/dsh-user-interaction": "workspace:^",
-    "cordis": "^4.0.0-rc.7"
-  }
-}
diff --git a/packages/ui/acp/snapshot-replay.md b/packages/ui/acp/snapshot-replay.md
deleted file mode 100644
index 9c716148aa..0000000000
--- a/packages/ui/acp/snapshot-replay.md
+++ /dev/null
@@ -1,27 +0,0 @@
-<!-- Generated by scripts/gen-doc-graphs.ts - do not edit by hand.
-     Run `pnpm run gen-doc-graphs` to regenerate. -->
-
-# ACP Snapshot Replay
-
-This graph explains what a snapshot scenario proves: recorded real-model session logs are replayed keylessly, ACP stdout is normalized and diffed, and scenario workspaces preserve tool side effects that the UI stream alone cannot prove.
-
-```mermaid
-sequenceDiagram
-  participant Recorder as Real API recording
-  participant Fixture as snapshot fixture
-  participant Workspace
-  participant Replay as llm-replay adapter
-  participant ACP as acp-agent subprocess
-  participant Expected as stdout expected output
-  Recorder->>Fixture: session.jsonl + workspace inputs
-  Fixture->>Workspace: seed files and hook configs
-  Fixture->>Replay: recorded StreamChunk script
-  Replay->>ACP: deterministic <code>llm/stream</code> chunks
-  ACP->>Workspace: bash, fs, and hook side effects
-  ACP->>Expected: normalized sessionUpdate stream
-  Expected-->>ACP: diff must be empty
-```
-
-The fs and hook snapshot matrix is valuable because it proves world state, hook decisions, and failed tool-card rendering, not just that replay returns text.
-
-Maintenance mode: curated Mermaid sequence based on the snapshot test harness.
diff --git a/packages/ui/acp/src/codec.ts b/packages/ui/acp/src/codec.ts
deleted file mode 100644
index 91453e3387..0000000000
--- a/packages/ui/acp/src/codec.ts
+++ /dev/null
@@ -1,138 +0,0 @@
-/**
- * Pure, total translation between harness vocabulary and ACP wire types.
- * @module @deepseek-ai/dsh-acp/codec
- */
-
-import type { ContentBlock } from '@deepseek-ai/dsh-llm'
-import type { TurnEndReason } from '@deepseek-ai/dsh-session'
-import {
-  SESSION_REFERENCE_SCHEME,
-  decodeSessionReferenceUri,
-  parseSessionReferenceText,
-  type SessionReferenceInput,
-} from '@deepseek-ai/dsh-session-reference'
-import type { ContentBlock as AcpContentBlock, StopReason } from '@agentclientprotocol/sdk'
-
-/**
- * Map a harness {@link TurnEndReason} to the ACP `StopReason` wire enum.
- *
- * `completed` and the defensive `error` case map to `end_turn`;
- * `max-tokens` maps to `max_tokens`; `aborted`, `disposed`, and `rejected` map
- * to `cancelled`. The bridge rejects error turns before this mapping. Unknown
- * merge-extensible kinds use legal fallback `end_turn` rather than breaking
- * the prompt RPC.
- * @param reason - the harness turn-end reason to translate.
- * @returns the legal ACP wire value per the mapping above.
- */
-export function turnEndToStopReason(reason: TurnEndReason): StopReason {
-  switch (reason.kind) {
-    case 'completed':
-      return 'end_turn'
-    case 'max-tokens':
-      return 'max_tokens'
-    case 'aborted':
-      return 'cancelled'
-    case 'disposed':
-      return 'cancelled'
-    case 'rejected':
-      return 'cancelled'
-    case 'error':
-      return 'end_turn'
-    // Merge-extensible: an unknown future TurnEndReason kind still has to produce a legal wire
-    // value (the SDK rejects unknown stopReason), so default to end_turn rather than
-    // assertNever.
-    default:
-      return 'end_turn'
-  }
-}
-
-/**
- * Map replayable text to ACP message content. Other block kinds use their
- * prompt, thought-stream, or tool-update paths.
- * @param block - the harness content block to translate.
- * @returns the ACP block, or `undefined` for a kind with no message-content mapping.
- */
-export function harnessBlockToAcpContent(block: ContentBlock): AcpContentBlock | undefined {
-  switch (block.type) {
-    case 'text':
-      return { type: 'text', text: block.text }
-    // reasoning → streamed as agent_thought_chunk, not a message block
-    // tool-call / tool-result → the tool_call / tool_call_update path
-    // plugin-added block types → not surfaced
-    default:
-      return undefined
-  }
-}
-
-/**
- * Extract plain text from an ACP prompt's content blocks. Text blocks are
- * concatenated verbatim; resource links become explicit textual references so
- * baseline ACP clients can point at files without the bridge silently dropping
- * that context.
- * @param prompt - the ACP prompt blocks to flatten.
- * @returns the concatenated text, with resource links rendered as bracketed references.
- */
-export function acpPromptToText(prompt: readonly AcpContentBlock[]): string {
-  return prompt
-    .flatMap((block): string[] => {
-      switch (block.type) {
-        case 'text':
-          return [block.text]
-        case 'resource_link':
-          return [`\n[resource_link name=${JSON.stringify(block.name)} uri=${JSON.stringify(block.uri)}]\n`]
-        default:
-          return []
-      }
-    })
-    .join('')
-}
-
-/** ACP prompt text plus structured session references extracted from text and resource links. */
-export interface AcpReferencedPrompt {
-  /** Readable prompt text with opaque session URIs removed. */
-  text: string
-  /** Structured session references in ACP block and inline appearance order. */
-  references: SessionReferenceInput[]
-}
-
-/**
- * Extract canonical session references while preserving ordinary ACP resource links.
- * @param prompt - already-supported ACP prompt blocks.
- * @returns readable text and structured references.
- * @throws when any observed `dsh-session:` URI is malformed.
- */
-export function acpPromptToReferencedPrompt(prompt: readonly AcpContentBlock[]): AcpReferencedPrompt {
-  const references: SessionReferenceInput[] = []
-  const text = prompt.flatMap((block): string[] => {
-    switch (block.type) {
-      case 'text': {
-        const parsed = parseSessionReferenceText(block.text)
-        references.push(...parsed.references)
-        return [parsed.text]
-      }
-      case 'resource_link': {
-        if (!block.uri.startsWith(SESSION_REFERENCE_SCHEME)) {
-          return [`\n[resource_link name=${JSON.stringify(block.name)} uri=${JSON.stringify(block.uri)}]\n`]
-        }
-        const sessionId = decodeSessionReferenceUri(block.uri)
-        const label = block.name === '' ? sessionId : block.name
-        references.push({ sessionId, label })
-        return [`@${label}`]
-      }
-      default:
-        return []
-    }
-  }).join('')
-  return { text, references }
-}
-
-/**
- * Whether an ACP prompt contains content the bridge cannot accept. Baseline ACP
- * requires `text` and `resource_link`; richer inline payloads (`resource`,
- * image, audio, …) are rejected rather than silently dropped.
- * @param prompt - the ACP prompt blocks to inspect.
- * @returns `true` when any block is neither `text` nor `resource_link`.
- */
-export function promptHasUnsupportedContent(prompt: readonly AcpContentBlock[]): boolean {
-  return prompt.some(block => block.type !== 'text' && block.type !== 'resource_link')
-}
diff --git a/packages/ui/acp/src/index.ts b/packages/ui/acp/src/index.ts
deleted file mode 100644
index 8a731a1bf6..0000000000
--- a/packages/ui/acp/src/index.ts
+++ /dev/null
@@ -1,1756 +0,0 @@
-/**
- * Multi-session ACP bridge over JSON-RPC stdio. Creates or resumes agents,
- * routes session-scoped events and approvals, and settles prompts by turn.
- * Stdout is reserved for protocol frames.
- *
- * @module @deepseek-ai/dsh-acp
- */
-
-import type { Context } from 'cordis'
-import { Readable, Writable } from 'node:stream'
-import { randomUUID } from 'node:crypto'
-import { isAbsolute, relative as relativePath, resolve as resolvePath, sep as pathSep } from 'node:path'
-import Schema from 'schemastery'
-import {
-  AgentSideConnection,
-  ndJsonStream,
-  PROTOCOL_VERSION,
-  RequestError,
-  type Agent as AcpAgent,
-  type AnyMessage,
-  type AuthenticateRequest,
-  type AvailableCommand,
-  type CancelNotification,
-  type ContentBlock as AcpContentBlock,
-  type CreateElicitationRequest,
-  type ElicitationContentValue,
-  type EnumOption,
-  type InitializeRequest,
-  type InitializeResponse,
-  type ListSessionsRequest,
-  type ListSessionsResponse,
-  type LoadSessionRequest,
-  type LoadSessionResponse,
-  type NewSessionRequest,
-  type NewSessionResponse,
-  type Plan,
-  type PlanEntry,
-  type PromptRequest,
-  type PromptResponse,
-  type SessionConfigOption,
-  type SessionModeState,
-  type SessionConfigSelectGroup,
-  type SessionConfigSelectOption,
-  type SessionNotification,
-  type SetSessionConfigOptionRequest,
-  type SetSessionConfigOptionResponse,
-  type SetSessionModeRequest,
-  type SetSessionModeResponse,
-  type Stream,
-  type StopReason,
-} from '@agentclientprotocol/sdk'
-import type { ContentBlock, LlmModelInfo, LlmProviderInfo } from '@deepseek-ai/dsh-llm'
-import { assertNever, CallId } from '@deepseek-ai/dsh-llm'
-import type {} from '@deepseek-ai/dsh-llm-retry'
-import {
-  installAgentLlmTarget,
-  type Agent,
-  type AgentLlmTarget as LlmTarget,
-  type AgentLlmTargetRef as LlmTargetRef,
-} from '@deepseek-ai/dsh-agent'
-import type {} from '@deepseek-ai/dsh-commands'
-import { encodeSessionReferenceUri } from '@deepseek-ai/dsh-session-reference'
-import { displayPromptContent, SessionId, type JsonValue } from '@deepseek-ai/dsh-session'
-// Side-effect type import: resolves `ctx.get('permission')` to the service.
-import type {} from '@deepseek-ai/dsh-permission'
-import type { SessionEvent, TodoItem, TurnEndReason } from '@deepseek-ai/dsh-session'
-// Side-effect type import: adds the log-only session/title event translated below.
-import type {} from '@deepseek-ai/dsh-session-title'
-import type { ToolCallView, ToolRegistry, ToolResultView, TerminalResultView } from '@deepseek-ai/dsh-tools'
-// Side-effect type import: declaration-merges `ctx.sessionPersistence` onto
-// Context (the bridge injects it and reads `list()` for load cwd validation).
-import type {} from '@deepseek-ai/dsh-session-persistence'
-// Side-effect type import: declaration-merges the exact-read service used by
-// session/list for live-preferred title folding.
-import type {} from '@deepseek-ai/dsh-session-query'
-// Type-only edge: resolves `ctx.get('planMode')` when dsh-plan-mode is composed;
-// the runtime read stays opportunistic.
-import type {} from '@deepseek-ai/dsh-plan-mode'
-// Side-effect type import: declaration-merges prompt assembly onto Context and
-// the scoped waterfall used to keep persona variables aligned with requests.
-import type {} from '@deepseek-ai/dsh-system-prompt'
-// Side-effect type import: declaration-merges the `approval/request` waterfall
-// the bridge answers for its own agents (see the approval answerer below).
-import type {} from '@deepseek-ai/dsh-user-approval'
-import {
-  UserInteractionError,
-  type AskUserQuestionAnswer,
-  type AskUserQuestionAnswerItem,
-  type AskUserQuestionItem,
-  type AskUserQuestionOption,
-  type AskUserQuestionRequest,
-} from '@deepseek-ai/dsh-user-interaction'
-import {
-  acpPromptToText,
-  acpPromptToReferencedPrompt,
-  harnessBlockToAcpContent,
-  promptHasUnsupportedContent,
-  turnEndToStopReason,
-} from './codec.ts'
-
-export const name = 'acp'
-// Interface services back loading, presentation, interaction, and prompt assembly.
-export const inject = ['agents', 'commands', 'sessionPersistence', 'sessionQuery', 'tools', 'userInteraction', 'llm', 'systemPrompt']
-
-/** ACP `SessionInfo._meta` key carrying a ready-to-submit session-reference URI. */
-export const ACP_SESSION_REFERENCE_META_KEY = 'deepseek-harness/sessionReference'
-
-/** Preserve invalid-parameter detail in the SDK wire error message. */
-function invalidParams(detail: string): RequestError {
-  return RequestError.invalidParams(undefined, detail)
-}
-
-const DEFAULT_SESSION_MODE_ID = 'default'
-const PLAN_SESSION_MODE_ID = 'plan'
-const AVAILABLE_SESSION_MODES = [
-  { id: DEFAULT_SESSION_MODE_ID, name: DEFAULT_SESSION_MODE_ID },
-  { id: PLAN_SESSION_MODE_ID, name: PLAN_SESSION_MODE_ID },
-]
-
-/** Map plan state onto ACP's named collaboration-mode protocol. */
-function sessionModeId(active: boolean): string {
-  return active ? PLAN_SESSION_MODE_ID : DEFAULT_SESSION_MODE_ID
-}
-
-/** Render arbitrary thrown values without trusting their string coercion. */
-function renderThrown(value: unknown): string {
-  try {
-    return String(value)
-  } catch {
-    return '<unrenderable thrown value>'
-  }
-}
-
-/** Return a server-created session id carried by an outbound success response. */
-function responseSessionId(message: AnyMessage): SessionId | undefined {
-  if (!('result' in message) || typeof message.result !== 'object' || message.result === null
-    || !('sessionId' in message.result) || typeof message.result.sessionId !== 'string') {
-    return undefined
-  }
-  return SessionId(message.result.sessionId)
-}
-
-/** Observe messages only after the wrapped ACP transport has written them. */
-function observeOutbound(stream: Stream, onWritten: (message: AnyMessage) => void): Stream {
-  const writer = stream.writable.getWriter()
-  return {
-    readable: stream.readable,
-    writable: new WritableStream<AnyMessage>({
-      async write(message) {
-        await writer.write(message)
-        onWritten(message)
-      },
-      /* v8 ignore start -- the ACP SDK never closes or aborts its outbound stream;
-         preserve the wrapped Stream contract for other consumers nonetheless */
-      close: () => writer.close(),
-      abort: (reason: unknown) => writer.abort(reason),
-      /* v8 ignore stop */
-    }),
-  }
-}
-
-/** Preserve failed-turn detail; plain handler errors become a generic wire internal error. */
-function internalError(detail: string): RequestError {
-  return RequestError.internalError(undefined, detail)
-}
-
-function sameWorkspaceCwd(left: string, right: string): boolean {
-  return resolvePath(left) === resolvePath(right)
-}
-
-function optionDescription(option: AskUserQuestionOption): string {
-  return option.description === undefined
-    ? option.label
-    : `${option.label}: ${option.description}`
-}
-
-function requireStringContent(
-  content: Record<string, ElicitationContentValue> | null | undefined,
-  key: string,
-): string | undefined {
-  const value = content?.[key]
-  return typeof value === 'string' && value.trim().length > 0 ? value : undefined
-}
-
-function askAbortError(): UserInteractionError {
-  return new UserInteractionError('ask_user_question was aborted before the user answered', 'ASK_ABORTED')
-}
-
-function withAbort<T>(promise: Promise<T>, signal: AbortSignal | undefined): Promise<T> {
-  if (signal === undefined) return promise
-  if (signal.aborted) return Promise.reject(askAbortError())
-  return new Promise<T>((resolve, reject) => {
-    const onAbort = (): void => {
-      signal.removeEventListener('abort', onAbort)
-      reject(askAbortError())
-    }
-    signal.addEventListener('abort', onAbort, { once: true })
-    promise.then(
-      (value) => {
-        signal.removeEventListener('abort', onAbort)
-        resolve(value)
-      },
-      (error: unknown) => {
-        signal.removeEventListener('abort', onAbort)
-        reject(new Error(String(error), { cause: error }))
-      },
-    )
-  })
-}
-
-function elicitationForQuestion(
-  sessionId: SessionId,
-  question: AskUserQuestionItem,
-  options: AskUserQuestionOption[],
-): CreateElicitationRequest {
-  const title = question.header ?? 'Question'
-  const message = question.detail === undefined
-    ? question.question
-    : `${question.question}\n\n${question.detail}`
-  if (options.length === 0) {
-    return {
-      sessionId,
-      mode: 'form',
-      message,
-      requestedSchema: {
-        type: 'object',
-        title,
-        properties: {
-          custom: { type: 'string', title: question.question },
-        },
-        required: ['custom'],
-      },
-    }
-  }
-
-  const choiceOptions: EnumOption[] = options.map(option => ({
-    const: option.label,
-    title: optionDescription(option),
-  }))
-  const choice = question.multiSelect === true
-    ? {
-      type: 'array' as const,
-      title: question.question,
-      description: 'Choose one or more options, or fill a custom answer below.',
-      items: {
-        anyOf: choiceOptions,
-      },
-    }
-    : {
-      type: 'string' as const,
-      title: question.question,
-      description: 'Choose one option, or fill a custom answer below.',
-      oneOf: choiceOptions,
-    }
-  return {
-    sessionId,
-    mode: 'form',
-    message,
-    requestedSchema: {
-      type: 'object',
-      title,
-      properties: {
-        choice,
-        custom: {
-          type: 'string',
-          title: 'Custom answer',
-          description: 'Optional free-form answer. Leave empty to use the selected option.',
-        },
-      },
-      required: [],
-    },
-  }
-}
-
-function stringArrayContent(
-  content: Record<string, ElicitationContentValue> | null | undefined,
-  key: string,
-): string[] {
-  const value = content?.[key]
-  if (Array.isArray(value)) return value.filter((item): item is string => typeof item === 'string' && item.length > 0)
-  return typeof value === 'string' && value.length > 0 ? [value] : []
-}
-
-/** Plugin config: the agent template ACP sessions are created from. */
-export interface AcpConfig {
-  /** Provider route for created agents. */
-  provider?: string
-  /** Model name for created agents (must have a registered adapter). */
-  model?: string
-  /** Runtime-only transport override; production uses stdio. */
-  stream?: Stream
-}
-
-export const Config: Schema<AcpConfig> = Schema.object({
-  provider: Schema.string(),
-  model: Schema.string(),
-})
-
-/** One resolved ACP model selector plus its opaque value lookup. */
-interface ModelDirectory {
-  option: Extract<SessionConfigOption, { type: 'select' }> | undefined
-  targets: ReadonlyMap<string, LlmTarget>
-}
-
-/** One provider and its adapter-advertised models, detached for one RPC. */
-interface ModelCatalogEntry {
-  provider: LlmProviderInfo
-  models: LlmModelInfo[]
-}
-
-/** Per-session bridge state keyed by ACP session id. */
-interface SessionRecord {
-  agent: Agent
-  /** Exact owned-agent disposer; resolves after registry, loop, and session teardown. */
-  dispose: () => Promise<void>
-  /** Per-session tool presentation and call/result correlation. */
-  presenter: ToolPresenter
-  /** Terminal capability snapshot shared by matching call and result updates. */
-  terminalEnabled: boolean
-  /**
-   * The last mode id this session sent to the client (advertised at
-   * session/new+load, echoed optimistically on session/set_mode, re-notified on
-   * each logged `plan/mode` that differs). `undefined` when dsh-plan-mode is
-   * not composed, so no mode surface is advertised or notified.
-   */
-  lastModeId: string | undefined
-  /** Session-local provider/model selection and the current step snapshot. */
-  target: LlmTargetRef
-  /** In-flight prompt and its captured turn number for exact settlement. */
-  inflight: {
-    resolve: (reason: StopReason) => void
-    reject: (error: Error) => void
-    turn: number | undefined
-  } | undefined
-  /** Abort owner for a direct slash-command request, mutually exclusive with `inflight`. */
-  commandAbort: AbortController | undefined
-  /** Abort owner while referenced sessions are snapshotted before enqueue. */
-  promptPreparation: AbortController | undefined
-  /** Last idle switch per knob, anchored before the next prompt assembles. */
-  pendingSwitches: { preset?: string }
-}
-
-/**
- * Drive the in-flight prompt's settle from the harness event stream. The bridge
- * settles off the durable `turn/end` event for the prompt's own turn. Session
- * contains post-commit observers independently, and this listener performs
- * correlation in a `finally` so presentation failure cannot starve settlement.
- */
-export function apply(ctx: Context, config: AcpConfig): void {
-  // ACP handlers execute outside this plugin's injection scope, so capture
-  // injected services during apply(); lazy service reads in a handler fail.
-  const agents = ctx.agents
-  const commands = ctx.commands
-  const llm = ctx.llm
-  const sessionPersistence = ctx.sessionPersistence
-  const logger = ctx.logger
-  const tools = ctx.tools
-  const userInteraction = ctx.userInteraction
-  // Presenter callbacks are contained so display failures cannot break protocol handling.
-  const makePresenter = (agent?: Agent): ToolPresenter => new ToolPresenter(tools, (message) => { logger.warn(message) }, agent)
-
-  /** Resolve a complete target only; partial config remains available to other request listeners. */
-  const configuredTarget = (): LlmTarget | undefined => config.provider !== undefined && config.model !== undefined
-    ? { provider: config.provider, model: config.model }
-    : undefined
-
-  /** Install the ACP target as an agent-scoped prompt/request override. */
-  const installTarget = (agentCtx: Context, target: LlmTargetRef): void => {
-    const agent = agentCtx.agent
-    /* v8 ignore next -- setup is invoked only with the freshly created agent's scoped context. */
-    if (agent === undefined) throw new Error('acp: agent setup has no scoped agent')
-    const logged = agent.session.requestHeader()?.config
-    if (logged !== undefined) target.current = { provider: logged.provider, model: logged.model }
-
-    installAgentLlmTarget(agentCtx, target)
-  }
-
-  /** Opaque ACP value preserving both routing dimensions. */
-  const targetValue = (target: LlmTarget): string => JSON.stringify([target.provider, target.model])
-
-  /** Read one detached advisory catalog snapshot before mutating session state. */
-  const readModelCatalog = async (): Promise<ModelCatalogEntry[]> => Promise.all(
-    llm.listProviders().map(async provider => ({
-      provider,
-      models: await llm.listModels(provider.id),
-    })),
-  )
-
-  /** Resolve one catalog snapshot into the ACP model selector for a session. */
-  const modelDirectory = (catalog: readonly ModelCatalogEntry[], current: LlmTarget | undefined): ModelDirectory => {
-    if (current === undefined) return { option: undefined, targets: new Map() }
-    const models = catalog.map(entry => ({ provider: entry.provider, models: [...entry.models] }))
-    const currentProvider = models.find(entry => entry.provider.id === current.provider)
-    if (currentProvider === undefined) return { option: undefined, targets: new Map() }
-    if (!currentProvider.models.some(model => model.id === current.model)) {
-      currentProvider.models = [...currentProvider.models, {
-        provider: current.provider,
-        id: current.model,
-        name: current.model,
-      }]
-    }
-
-    const targets = new Map<string, LlmTarget>()
-    const groups = models.flatMap(({ provider, models: entries }) => {
-      if (entries.length === 0) return []
-      const options = entries.map((model): SessionConfigSelectOption => {
-        const target = { provider: model.provider, model: model.id }
-        const value = targetValue(target)
-        targets.set(value, target)
-        return {
-          value,
-          name: model.name,
-          ...model.description === undefined ? {} : { description: model.description },
-        }
-      })
-      return [{ group: provider.id, name: provider.name, options } satisfies SessionConfigSelectGroup]
-    })
-    return {
-      option: {
-        id: 'model',
-        name: 'Model',
-        description: 'Sets this session\'s provider and model.',
-        category: 'model',
-        type: 'select',
-        currentValue: targetValue(current),
-        options: groups.length === 1 ? groups.flatMap(group => group.options) : groups,
-      },
-      targets,
-    }
-  }
-
-  const sessions = new Map<SessionId, SessionRecord>()
-  // Reserve an id before resume so pipelined load/new requests cannot duplicate it.
-  const loadingIds = new Set<SessionId>()
-  // A new-session response introduces its server-generated id to the client;
-  // keep its initial command snapshot pending until that response is written.
-  const pendingCommandSnapshots = new Map<SessionId, SessionRecord>()
-  // Async creation checks this after awaits to avoid publishing after teardown.
-  let closed = false
-  // Each new or loaded session snapshots the latest connection capability.
-  let terminalOutputCap = false
-
-  // Assigned at the bottom, before any agent event can fire (a session only
-  // exists after `newSession`, which the client calls after construction), so
-  // `notify` never observes it unset — no undefined guard needed.
-  let conn: AgentSideConnection
-
-  /** Return the bridge-owned record for an agent, rejecting same-id impostors. */
-  const ownedRecord = (agent: Agent): SessionRecord | undefined => {
-    const rec = sessions.get(agent.session.id)
-    return rec?.agent === agent ? rec : undefined
-  }
-
-  userInteraction.registerProvider({
-    async ask(request: AskUserQuestionRequest): Promise<AskUserQuestionAnswer> {
-      if (request.agent === undefined) {
-        throw new UserInteractionError('ACP user questions must come from an agent-owned request', 'NO_AGENT')
-      }
-      const rec = ownedRecord(request.agent)
-      if (rec === undefined) {
-        throw new UserInteractionError('ACP user question has no matching session', 'NO_SESSION')
-      }
-      const answers: AskUserQuestionAnswerItem[] = []
-      for (const question of request.questions) {
-        const options = question.options ?? []
-        const response = await withAbort(conn.unstable_createElicitation(
-          elicitationForQuestion(rec.agent.session.id, question, options),
-        ), request.signal).catch((error: unknown) => {
-          if (error instanceof UserInteractionError) throw error
-          throw new UserInteractionError('ACP elicitation request failed', 'ASK_FAILED', { cause: error })
-        })
-        if (response.action !== 'accept') {
-          throw new UserInteractionError('ask_user_question was cancelled by the user', 'ASK_CANCELLED')
-        }
-        const custom = requireStringContent(response.content, 'custom')
-        const selected = stringArrayContent(response.content, 'choice')
-        if (custom === undefined && selected.length === 0) {
-          throw new UserInteractionError('ask_user_question returned no answer', 'NO_ANSWER')
-        }
-        answers.push({
-          id: question.id,
-          selected: custom === undefined ? selected : [],
-          ...custom !== undefined ? { custom } : {},
-        })
-      }
-      return { answers }
-    },
-  })
-
-  /**
-   * Reject any RPC after the bridge has torn down. The `AgentSideConnection`
-   * receive loop can outlive the plugin fiber — under an ACP-only HMR reload the
-   * `agents`/`agent-loop` services stay up while the bridge's `ctx.on` listeners
-   * and disposer are gone — so a late `session/new`/`load`/`prompt` could create
-   * or drive an agent the bridge can no longer stream or settle. Every
-   * state-affecting handler calls this first. (`initialize`/`authenticate` are
-   * pure/stateless and may answer harmlessly.)
-   */
-  const assertOpen = (): void => {
-    if (closed) throw internalError('the ACP bridge has been disposed')
-  }
-
-  /** Resolve the live record for a sessionId, or throw an ACP error. */
-  const requireSession = (sessionId: SessionId): SessionRecord => {
-    const rec = sessions.get(sessionId)
-    if (rec === undefined) {
-      throw invalidParams(`unknown session: ${sessionId}`)
-    }
-    return rec
-  }
-
-  /** Push a `session/update` notification, swallowing post-close rejections. */
-  const notify = (notification: SessionNotification): void => {
-    // sessionUpdate returns a promise; a closed connection rejects it. The
-    // update is best-effort UI feed, never load-bearing for correctness, so a
-    // throwing/rejecting send must not break the turn (the chunk is emitted
-    // inside the model step — see docs/defensive-patterns.md "contain callback exceptions").
-    /* v8 ignore next 3 -- the rejection only fires on a stdout/connection write
-       failure (closed pipe), which the in-memory test transport never induces;
-       the swallow is a defensive best-effort guard like the loop's emit traps */
-    void Promise.resolve(conn.sessionUpdate(notification)).catch((error: unknown) => {
-      logger.warn(`acp: session/update failed: ${String(error)}`)
-    })
-  }
-
-  /** Project the effective registry view onto ACP discovery metadata. */
-  const availableCommands = (agent: Agent): AvailableCommand[] => commands.list(agent).map(command => ({
-    name: command.name,
-    description: command.description,
-    ...command.input === undefined ? {} : { input: { hint: command.input.hint } },
-  }))
-
-  /** Push the protocol's full-snapshot command catalog for one live session. */
-  const notifyCommands = (rec: SessionRecord): void => {
-    notify({
-      sessionId: rec.agent.session.id,
-      update: {
-        sessionUpdate: 'available_commands_update',
-        availableCommands: availableCommands(rec.agent),
-      },
-    })
-  }
-
-  /** Enqueue a new session's first command snapshot behind its written RPC response. */
-  const announceInitialCommands = (message: AnyMessage): void => {
-    const sessionId = responseSessionId(message)
-    if (sessionId === undefined) return
-    const rec = pendingCommandSnapshots.get(sessionId)
-    if (rec === undefined) return
-    pendingCommandSnapshots.delete(sessionId)
-    notifyCommands(rec)
-  }
-
-  // Registration and HMR removal can affect global or one scoped view; refresh
-  // every announced bridge-owned session and let the registry resolve each
-  // exact agent. A pending new-session snapshot will read the latest registry.
-  ctx.on('commands/change', () => {
-    for (const rec of sessions.values()) {
-      if (!pendingCommandSnapshots.has(rec.agent.session.id)) notifyCommands(rec)
-    }
-  })
-
-  /** Settle the in-flight prompt with a stop reason, exactly once (no-op if none pending). */
-  const settlePrompt = (rec: SessionRecord, reason: StopReason): void => {
-    const inflight = rec.inflight
-    if (inflight === undefined) return
-    rec.inflight = undefined
-    inflight.resolve(reason)
-  }
-
-  /** Apply the single ACP prompt-settlement mapping for a completed turn. */
-  const settleFromTurnEnd = (
-    inflight: NonNullable<SessionRecord['inflight']>,
-    reason: TurnEndReason,
-  ): void => {
-    if (reason.kind === 'error') {
-      inflight.reject(internalError(`turn failed: ${'failure' in reason ? reason.failure.message : reason.message}`))
-    } else {
-      inflight.resolve(turnEndToStopReason(reason))
-    }
-  }
-
-  // --- Stream the harness event taxonomy to ACP session/update --------------
-
-  // --- Session modes (dsh-plan-mode, opportunistic) -------------------------
-  // ACP's generic mode picker projects the one plan capability as the fixed
-  // `default` / `plan` vocabulary. A selection is echoed optimistically; the
-  // logged `plan/mode` follows at the boundary and tool-driven exits are
-  // re-notified from that event. Environment knobs remain config options.
-  const modesStateFor = (agent: Agent): SessionModeState | undefined => {
-    const planMode = ctx.get('planMode')
-    if (planMode === undefined) return undefined
-    const { active, pending } = planMode.get(agent)
-    return {
-      availableModes: AVAILABLE_SESSION_MODES,
-      currentModeId: sessionModeId(pending ?? active),
-    }
-  }
-
-  // All content streaming AND the prompt settle flow through `session/event`,
-  // the canonical log: every assistant/chunk and tool/call/result is logged, so
-  // translating from the log makes live streaming and `session/load` replay
-  // share the identical path (streamSessionEventUpdate). Both the owning-turn
-  // capture and the settle key off the log's own `turn/start`/`turn/end` — the
-  // durable boundary events (there is no agent/* turn mirror). `closeTurn`
-  // appends `turn/end` to the log unconditionally, and `turn/start` is appended
-  // before any step runs, so within this one listener we always see the
-  // prompt's turn-start (tag `inflight.turn`) then its turn-end (settle). A
-  // `turn/end` settles the prompt ONLY when it is the prompt's OWN turn
-  // (`inflight.turn === event.data.turn`) — a previous, already-cancelled turn
-  // whose end arrives late is ignored (see
-  // SessionRecord.inflight). A turn that ends `error` REJECTS the prompt (ACP
-  // has no error stop reason); other reasons resolve via the codec. Demux
-  // strictly by session id: concurrent updates may alternate on the shared
-  // connection, but they retain the owning id and never cross-settle.
-  ctx.on('session/event', (session, event: SessionEvent) => {
-    const rec = sessions.get(session.header.id)
-    if (rec === undefined) return
-    try {
-      streamSessionEventUpdate(rec.agent.session.id, event, notify, rec.presenter, {
-        enabled: rec.terminalEnabled,
-        cwd: session.header.cwd,
-      }, { includeUserMessages: false })
-    } finally {
-      // Re-notify from the EVENT's value, not from planMode.get(): the service
-      // holds one coalesced pending slot (every flush reads the latest
-      // selection, so a flush can never be stale against the picker), and for
-      // any other writer — the exit tool, a test, a foreign plugin — the logged
-      // value IS the truth the picker should track, in log order. Inside the
-      // containment `finally` like the prompt settlement: a throwing presenter
-      // must not desync the picker.
-      if (event.type === 'plan/mode') {
-        const modeId = sessionModeId(event.data.active)
-        if (modeId !== rec.lastModeId) {
-          rec.lastModeId = modeId
-          notify({ sessionId: rec.agent.session.id, update: { sessionUpdate: 'current_mode_update', currentModeId: modeId } })
-        }
-      }
-      const inflight = rec.inflight
-      if (inflight !== undefined && event.type === 'turn/start') {
-        // The first message-triggered turn after prompt installation owns the
-        // prompt; injection-triggered turns must not settle it early.
-        if (inflight.turn === undefined && event.data.trigger.kind === 'message') {
-          inflight.turn = event.data.turn
-        }
-      } else if (inflight !== undefined && event.type === 'turn/end' && inflight.turn === event.data.turn) {
-        rec.inflight = undefined
-        settleFromTurnEnd(inflight, event.data.reason)
-      }
-    }
-  })
-
-  // --- Approval answerer -----------------------------------------------------
-  // The bridge is the approval channel for the agents it owns: an `ask` routed
-  // through `ctx.approval` (dsh-tools asks and sandbox escalation) becomes
-  // an editor permission prompt attached to the already-streamed tool call. The
-  // listener occupies the single decision slot ONLY for its own agents — a
-  // foreign or call-less request delegates via next() so another answerer (or
-  // the fail-closed `unavailable` default) takes the question. A rejected
-  // `requestPermission` (client gone, bridge torn down) propagates and the
-  // ApprovalService contains it as `unavailable`. Options are one-shot only:
-  // allow_always is a grant-storage design the approval Agent Note defers, so the
-  // prompt never offers a durable grant the harness could not honor.
-  ctx.on('approval/request', (req, next) => {
-    const rec = ownedRecord(req.agent)
-    // The protocol requires `toolCall` (the prompt renders attached to it), so
-    // a request without a callId has nothing to attach to — delegate.
-    if (rec === undefined || req.callId === undefined) return next()
-    return conn.requestPermission({
-      sessionId: rec.agent.session.id,
-      toolCall: { toolCallId: req.callId },
-      options: [
-        { optionId: 'allow-once', name: 'Allow once', kind: 'allow_once' },
-        { optionId: 'reject-once', name: 'Reject', kind: 'reject_once' },
-      ],
-    }).then(({ outcome }) => {
-      if (outcome.outcome === 'cancelled') return 'cancelled'
-      // Only the two advertised options exist; an unknown optionId from a
-      // non-conforming client counts as a rejection, never a grant.
-      return outcome.optionId === 'allow-once' ? 'allowed-once' : 'rejected'
-    })
-  })
-
-  // --- The ACP Agent method surface -----------------------------------------
-
-  /** Build every ACP session option from the model directory and live services. */
-  const configOptionsFor = (
-    agent: Agent,
-    directory: ModelDirectory,
-    pending: SessionRecord['pendingSwitches'] = {},
-  ): SessionConfigOption[] => {
-    const options = directory.option === undefined ? [] : [directory.option]
-    const presets = ctx.get('permission')
-    if (presets === undefined) return options
-    const currentValue = pending.preset ?? presets.current(agent.session.events)
-    return [...options, {
-      id: 'permission',
-      name: 'Permissions',
-      description: 'The session permission preset: each choice bundles a sandbox mode and an approval policy.',
-      category: 'mode',
-      type: 'select',
-      currentValue,
-      options: [
-        ...presets.names.map((name: string) => presets.optionOf(name)),
-        // `custom` echoes the current derived state but is never a target.
-        ...currentValue === 'custom' ? [presets.optionOf('custom')] : [],
-      ],
-    }]
-  }
-
-  /** Whether the log has an open turn in which a config switch can be enclosed. */
-  const isTurnOpen = (agent: Agent): boolean => {
-    const events = agent.session.events
-    for (let index = events.length - 1; index >= 0; index -= 1) {
-      const type = (events[index] as SessionEvent).type
-      if (type === 'turn/start') return true
-      if (type === 'turn/end') return false
-    }
-    return false
-  }
-
-  /** Anchor last-write-wins idle switches into a just-opened turn. */
-  const flushPendingSwitches = (rec: SessionRecord): void => {
-    const pending = rec.pendingSwitches
-    rec.pendingSwitches = {}
-    if (pending.preset === undefined) return
-    const presets = ctx.get('permission')
-    /* v8 ignore next -- a pending preset exists only if the service answered the
-       switch; it cannot unmount between that and the next turn in any composition. */
-    if (presets === undefined) return
-    presets.set(rec.agent.session, pending.preset)
-  }
-
-  // Prompt-submit is inside the new turn but before prompt assembly. Promptless
-  // injection turns leave the switch pending because they execute no request.
-  ctx.on('agent/prompt-submit', (agent, _content, _source, _signal, next) => {
-    const rec = ownedRecord(agent)
-    if (rec !== undefined) flushPendingSwitches(rec)
-    return next()
-  })
-
-  const makeAgent = (connection: AgentSideConnection): AcpAgent => {
-    conn = connection
-    return {
-      initialize(params: InitializeRequest): Promise<InitializeResponse> {
-        // Echo the client's version if we support it, else our own. We support
-        // exactly PROTOCOL_VERSION; any other requested version negotiates
-        // down to ours (the client disconnects if it can't speak it).
-        const protocolVersion = params.protocolVersion === PROTOCOL_VERSION ? params.protocolVersion : PROTOCOL_VERSION
-        // Remember the Zed terminal-output `_meta` capability: when set, bash and
-        // other shell tools render as a terminal card (see streamSessionEventUpdate
-        // + the terminal-rendering Agent Note). `_meta` is `{[k]: unknown} | null`, so
-        // narrow defensively to a strict boolean true.
-        terminalOutputCap = params.clientCapabilities?._meta?.['terminal_output'] === true
-        return Promise.resolve({
-          protocolVersion,
-          // Fixed server identity: this bridge IS the harness ACP server, so the
-          // branding is a literal, not config (no shipped surface sets it).
-          agentInfo: { name: 'deepseek-harness-acp', version: '0.0.1' },
-          agentCapabilities: {
-            loadSession: true,
-            sessionCapabilities: { list: {} },
-            // Baseline prompt blocks only: text plus resource_link rendered as
-            // text. No image/audio/embeddedContext, no mcpCapabilities.
-            promptCapabilities: { image: false, audio: false, embeddedContext: false },
-          },
-          authMethods: [],
-        })
-      },
-
-      authenticate(_params: AuthenticateRequest): Promise<void> {
-        // No auth methods advertised; nothing to do. Present because the SDK
-        // Agent interface requires it.
-        return Promise.resolve()
-      },
-
-      async listSessions(params: ListSessionsRequest): Promise<ListSessionsResponse> {
-        assertOpen()
-        if (params.cursor !== undefined && params.cursor !== null) {
-          throw invalidParams('session/list does not paginate; omit cursor')
-        }
-        if (params.cwd !== undefined && params.cwd !== null && !isAbsolute(params.cwd)) {
-          throw invalidParams('session/list cwd must be absolute')
-        }
-        const records = (await ctx.sessionQuery.listSessions()).flatMap((record) => {
-          const cwd = record.header.cwd
-          if (cwd === undefined) return []
-          if (params.cwd !== undefined && params.cwd !== null && !sameWorkspaceCwd(cwd, params.cwd)) return []
-          return [{ record, cwd }]
-        })
-        const titles = await Promise.all(records.map(({ record }) => ctx.sessionQuery.readTitle(record.header.id)))
-        assertOpen()
-        const referencesAvailable = ctx.get('sessionReferences') !== undefined
-        return {
-          sessions: records.map(({ record, cwd }, index) => ({
-            sessionId: record.header.id,
-            cwd,
-            ...titles[index] === undefined ? {} : { title: titles[index].title },
-            ...referencesAvailable
-              ? {
-                _meta: {
-                  [ACP_SESSION_REFERENCE_META_KEY]: {
-                    uri: encodeSessionReferenceUri(record.header.id),
-                  },
-                },
-              }
-              : {},
-          })),
-        }
-      },
-
-      async newSession(params: NewSessionRequest): Promise<NewSessionResponse> {
-        assertOpen()
-        validateWorkspaceParams(params)
-        validateMcpServers(params)
-        const sessionId = SessionId(randomUUID())
-        const target: LlmTargetRef = { current: configuredTarget(), assembled: undefined }
-        const directory = modelDirectory(await readModelCatalog(), target.current)
-        assertOpen()
-        const handle = await agents.create({
-          sessionId,
-          meta: { cwd: params.cwd },
-          agentOptions: agentOptions(config),
-          setup: (agentCtx) => { installTarget(agentCtx, target) },
-        })
-        // Agent creation may resolve after the bridge closes; dispose the handle
-        // instead of publishing a record that teardown could not observe.
-        /* v8 ignore next 4 -- the in-memory transport rejects the in-flight RPC
-           immediately on close; real stdio may let the handler resume */
-        if (closed) {
-          await handle.dispose()
-          throw internalError('connection closed during session/new')
-        }
-        const modes = modesStateFor(handle.agent)
-        const record: SessionRecord = {
-          agent: handle.agent,
-          dispose: () => handle.dispose(),
-          presenter: makePresenter(handle.agent),
-          terminalEnabled: terminalOutputCap,
-          lastModeId: modes?.currentModeId,
-          target,
-          inflight: undefined,
-          commandAbort: undefined,
-          promptPreparation: undefined,
-          pendingSwitches: {},
-        }
-        sessions.set(sessionId, record)
-        pendingCommandSnapshots.set(sessionId, record)
-        const configOptions = configOptionsFor(handle.agent, directory)
-        return {
-          sessionId,
-          ...modes !== undefined ? { modes } : {},
-          ...configOptions.length > 0 ? { configOptions } : {},
-        }
-      },
-
-      async loadSession(params: LoadSessionRequest): Promise<LoadSessionResponse> {
-        assertOpen()
-        // The wire `params.sessionId` is a raw protocol string; brand it once at
-        // this entry so the session collections and the resume factory see a SessionId.
-        const sessionId = SessionId(params.sessionId)
-        if (sessions.has(sessionId) || loadingIds.has(sessionId)) {
-          throw invalidParams(`session ${sessionId} is already loaded`)
-        }
-        validateWorkspaceParams(params)
-        validateMcpServers(params)
-        // Reserve THIS id's load slot BEFORE the await. Without it, two pipelined
-        // loads for the same id could both pass the guard above while the first
-        // resume() is pending, then both install a record and leak a second
-        // agent. (Distinct ids load concurrently — the set is keyed by id.) The
-        // slot is released in `finally` so a rejected load never wedges the id.
-        loadingIds.add(sessionId)
-        try {
-          // Validate the PERSISTED cwd BEFORE resuming — `list()` is a
-          // metadata-only read (no full-log parse), so this rejects a session we
-          // can't honor WITHOUT ever constructing/registering an agent (a
-          // post-resume reject would leak the registered agent — cancel() does not
-          // unregister it — and wedge the id against re-load). The session's bash
-          // workdir is derived from its persisted `header.cwd` and the request
-          // `cwd` does NOT override it (resume takes no cwd), so a session with no
-          // absolute persisted cwd would silently run bash in the SERVER's launch
-          // dir, not the client's workspace. A session created by this bridge
-          // always has a cwd (session/new requires it); reject the rest loudly.
-          // (An id unknown to `list()` falls through to resume, which rejects with
-          // the backend's not-found error.)
-          const meta = (await sessionPersistence.list()).find(m => m.id === sessionId)
-          if (meta !== undefined) {
-            const persistedCwd = meta.cwd
-            if (persistedCwd === undefined || !isAbsolute(persistedCwd)) {
-              throw invalidParams(
-                `session ${sessionId} has no absolute persisted cwd; cannot determine its workspace (it predates per-session cwd, or was created without one)`,
-              )
-            }
-            if (!sameWorkspaceCwd(persistedCwd, params.cwd)) {
-              throw invalidParams(`session ${sessionId} cwd mismatch: persisted ${persistedCwd}, requested ${params.cwd}`)
-            }
-          }
-          const catalog = await readModelCatalog()
-          assertOpen()
-          const target: LlmTargetRef = { current: configuredTarget(), assembled: undefined }
-          const handle = await agents.resume({
-            resumeSessionId: sessionId,
-            agentOptions: agentOptions(config),
-            setup: (agentCtx) => { installTarget(agentCtx, target) },
-          })
-          // The bridge may have torn down (disposal / client disconnect) while
-          // resume() was pending. Its listeners are gone, so installing a record
-          // now would resurrect a live agent the bridge can no longer drive. Bail —
-          // and tear down the just-resumed agent (unregister + stop + remove its
-          // session) before throwing, so it does not leak: it has no SessionRecord,
-          // so quiesce() would never see it.
-          /* v8 ignore next 4 -- the in-memory test transport rejects the in-flight
-             session/load request the instant it closes (before this post-await
-             code runs), so the guard can't be hit in tests; it protects the real
-             stdio path, where a closed pipe need not reject a mid-flight handler. */
-          if (closed) {
-            await handle.dispose()
-            throw invalidParams('connection closed during session/load')
-          }
-          const directory = modelDirectory(catalog, target.current)
-          const agent = handle.agent
-          // Snapshot the terminal capability ONCE for this session (used by both
-          // the replay below and the post-load live stream) so a later
-          // `initialize` can't desync the call/result of a tool card.
-          const terminalEnabled = terminalOutputCap
-          const modes = modesStateFor(agent)
-          const record: SessionRecord = {
-            agent,
-            dispose: () => handle.dispose(),
-            presenter: makePresenter(agent),
-            terminalEnabled,
-            lastModeId: modes?.currentModeId,
-            target,
-            inflight: undefined,
-            commandAbort: undefined,
-            promptPreparation: undefined,
-            pendingSwitches: {},
-          }
-          sessions.set(sessionId, record)
-          // Replay the persisted event log to the client as session/update. Use
-          // the raw event log (NOT deriveMessages, which drops assistant/chunk
-          // and trace events): RFC 010's load contract reconstructs the streamed
-          // turns — user prompts (user/message → user_message_chunk), assistant
-          // text and reasoning (assistant/chunk), and tool calls/results.
-          //
-          // Replay through a THROWAWAY presenter, NOT `record.presenter`: a
-          // historical turn that was interrupted mid-tool (a `tool/call` with no
-          // matching `tool/result` in the persisted log) would otherwise leave a
-          // stale in-flight entry on the live presenter, which then serves all
-          // future live events for this session. The throwaway pairs call→result
-          // as the log replays in order (same as live) and is discarded after,
-          // so the record's presenter starts clean for the post-load live stream.
-          const replayPresenter = makePresenter(agent)
-          const replayTerminal: TerminalRendering = {
-            enabled: terminalEnabled,
-            cwd: agent.session.header.cwd,
-          }
-          for (const event of agent.session.events) {
-            streamSessionEventUpdate(sessionId, event, notify, replayPresenter, replayTerminal)
-          }
-          notifyCommands(record)
-          const configOptions = configOptionsFor(agent, directory)
-          return {
-            ...modes !== undefined ? { modes } : {},
-            ...configOptions.length > 0 ? { configOptions } : {},
-          }
-        } finally {
-          loadingIds.delete(sessionId)
-        }
-      },
-
-      setSessionMode(params: SetSessionModeRequest): Promise<SetSessionModeResponse> {
-        assertOpen()
-        const rec = requireSession(SessionId(params.sessionId))
-        const planMode = ctx.get('planMode')
-        if (planMode === undefined) throw invalidParams('session modes are not composed in this deployment')
-        if (params.modeId !== DEFAULT_SESSION_MODE_ID && params.modeId !== PLAN_SESSION_MODE_ID) {
-          throw invalidParams(`unknown session mode ${JSON.stringify(params.modeId)} — available modes: default, plan`)
-        }
-        planMode.set(rec.agent, params.modeId === PLAN_SESSION_MODE_ID)
-        // Optimistic echo: the pending mode IS the user's selection; the logged
-        // `plan/mode` lands at the next turn boundary and, matching lastModeId,
-        // is not re-notified. A no-op selection (already current) echoes too —
-        // cheap, idempotent, and the picker settles regardless.
-        rec.lastModeId = params.modeId
-        notify({ sessionId: rec.agent.session.id, update: { sessionUpdate: 'current_mode_update', currentModeId: params.modeId } })
-        return Promise.resolve({})
-      },
-
-      async prompt(params: PromptRequest): Promise<PromptResponse> {
-        assertOpen()
-        const rec = requireSession(SessionId(params.sessionId))
-        if (rec.inflight !== undefined || rec.commandAbort !== undefined || rec.promptPreparation !== undefined) {
-          throw invalidParams('a prompt is already in flight for this session')
-        }
-        if (promptHasUnsupportedContent(params.prompt)) {
-          throw invalidParams('only text and resource_link prompt content is supported; image/audio/embedded resource blocks are rejected rather than silently dropped')
-        }
-        const flattenedText = acpPromptToText(params.prompt)
-        if (flattenedText.trim().length === 0) {
-          // Reject up front rather than calling send(): an empty prompt would
-          // queue no work, no turn would start, and the RPC would hang forever
-          // waiting for a settle that never comes.
-          throw invalidParams('empty prompt')
-        }
-        // Direct commands consume ordinary ACP flattening before reference
-        // extraction, so URI-shaped arguments remain opaque to the bridge.
-        const commandLine = flattenedText.startsWith('/') ? flattenedText : undefined
-        if (commandLine !== undefined) {
-          const controller = new AbortController()
-          rec.commandAbort = controller
-          try {
-            const result = await commands.execute(rec.agent, commandLine, controller.signal)
-            if (result !== undefined && result.text !== undefined && result.text !== '') {
-              notify({
-                sessionId: rec.agent.session.id,
-                update: {
-                  sessionUpdate: 'agent_message_chunk',
-                  content: {
-                    type: 'text',
-                    text: result.kind === 'error' ? `Error: ${result.text}` : result.text,
-                  },
-                },
-              })
-            } else if (result === undefined) {
-              notify({
-                sessionId: rec.agent.session.id,
-                update: {
-                  sessionUpdate: 'agent_message_chunk',
-                  content: { type: 'text', text: `Error: unknown command: ${commandLine}` },
-                },
-              })
-            }
-            return { stopReason: 'end_turn' }
-          } catch (error: unknown) {
-            if (controller.signal.aborted) return { stopReason: 'cancelled' }
-            const rendered = renderThrown(error)
-            logger.warn(`acp: command failed: ${rendered}`)
-            notify({
-              sessionId: rec.agent.session.id,
-              update: {
-                sessionUpdate: 'agent_message_chunk',
-                content: { type: 'text', text: `Error: command failed: ${rendered}` },
-              },
-            })
-            return { stopReason: 'end_turn' }
-          } finally {
-            rec.commandAbort = undefined
-          }
-        }
-        let referencedPrompt: ReturnType<typeof acpPromptToReferencedPrompt>
-        try {
-          referencedPrompt = acpPromptToReferencedPrompt(params.prompt)
-        } catch (error: unknown) {
-          throw invalidParams(`invalid session reference: ${renderThrown(error)}`)
-        }
-        const { text } = referencedPrompt
-        let preparedContent: ContentBlock[] = [{ type: 'text', text }]
-        let preparedContexts: NonNullable<Parameters<Agent['send']>[1]>['contexts'] = []
-        if (referencedPrompt.references.length > 0) {
-          const sessionReferences = ctx.get('sessionReferences')
-          if (sessionReferences === undefined) {
-            throw invalidParams('session reference capability unavailable')
-          }
-          const controller = new AbortController()
-          rec.promptPreparation = controller
-          try {
-            const prepared = await sessionReferences.prepare(
-              rec.agent,
-              preparedContent,
-              referencedPrompt.references,
-              controller.signal,
-            )
-            preparedContent = prepared.content
-            preparedContexts = prepared.contexts
-          } catch (error: unknown) {
-            if (controller.signal.aborted) return { stopReason: 'cancelled' }
-            throw invalidParams(`session reference preparation failed: ${renderThrown(error)}`)
-          } finally {
-            rec.promptPreparation = undefined
-          }
-          assertOpen()
-        }
-        // Install the in-flight slot BEFORE send() (send does not synchronously
-        // flip status to running; the session/event listener records the turn
-        // number and settle/rejects it). Capture the log length now as the
-        // A turn that ends in error rejects this promise (the codec never
-        // produces an error stop reason).
-        const stopReason = await new Promise<StopReason>((resolve, reject) => {
-          rec.inflight = { resolve, reject, turn: undefined }
-          rec.agent.send(preparedContent, { contexts: preparedContexts })
-        })
-        return { stopReason }
-      },
-
-      cancel(params: CancelNotification): Promise<void> {
-        const rec = sessions.get(SessionId(params.sessionId))
-        if (rec === undefined) return Promise.resolve()
-        // session/cancel maps to the queue-aware agent.cancel({ kind: 'user' }): it aborts
-        // a RUNNING step, clears the queued + steering FIFOs, and drops a
-        // turn that is about to start (the pre-step window) — so a queued-but-
-        // not-yet-started prompt never runs, while a prompt accepted afterward
-        // remains a separate queued turn. Scoped to THIS session's
-        // agent — a cancel in one session never touches another's stream or
-        // pending prompt (multi-session isolation).
-        // We ALSO settle the in-flight prompt
-        // as cancelled directly here: do NOT rely on the resulting turn/end to
-        // settle it, because cancel() may drop the turn before any turn/end is
-        // emitted, and removing this direct settle would move the RPC's
-        // resolution onto a later observer path, changing its timing.
-        if (rec.promptPreparation !== undefined) {
-          rec.promptPreparation.abort(new Error('session/cancel'))
-        } else if (rec.commandAbort !== undefined) {
-          rec.commandAbort.abort(new Error('session/cancel'))
-        } else {
-          rec.agent.cancel({ kind: 'user' })
-          settlePrompt(rec, 'cancelled')
-        }
-        return Promise.resolve()
-      },
-
-      async setSessionConfigOption(params: SetSessionConfigOptionRequest): Promise<SetSessionConfigOptionResponse> {
-        assertOpen()
-        const rec = requireSession(SessionId(params.sessionId))
-        // Every advertised option is a select, so the boolean-shaped variant
-        // is a protocol misuse regardless of configId.
-        if (typeof params.value !== 'string') {
-          throw invalidParams(`config option ${params.configId} is a select; boolean values are not accepted`)
-        }
-        let directory = modelDirectory(await readModelCatalog(), rec.target.current)
-        // Open-turn switches append immediately; idle switches wait for the
-        // next prompt-submit. Only values advertised by this composition are
-        // accepted, and the session log remains the durable store.
-        switch (params.configId) {
-          case 'model': {
-            const target = directory.targets.get(params.value)
-            if (target === undefined) {
-              throw invalidParams(`unknown model value ${JSON.stringify(params.value)}`)
-            }
-            rec.target.current = { ...target }
-            const option = directory.option
-            /* v8 ignore next -- `targets` is populated only while constructing
-               this selector; a found target therefore proves it exists. */
-            if (option === undefined) throw internalError('model directory target has no selector')
-            directory = {
-              ...directory,
-              option: { ...option, currentValue: params.value },
-            }
-            break
-          }
-          case 'permission': {
-            const presets = ctx.get('permission')
-            if (presets === undefined) {
-              throw invalidParams(`unknown permission value ${JSON.stringify(params.value)}`)
-            }
-            // A current-value echo is acknowledged without recording a switch.
-            const current = rec.pendingSwitches.preset ?? presets.current(rec.agent.session.events)
-            if (params.value === current) break
-            if (!presets.names.includes(params.value)) {
-              throw invalidParams(`unknown permission value ${JSON.stringify(params.value)}`)
-            }
-            if (isTurnOpen(rec.agent)) presets.set(rec.agent.session, params.value)
-            else rec.pendingSwitches.preset = params.value
-            break
-          }
-          default:
-            throw invalidParams(`unknown config option ${JSON.stringify(params.configId)}`)
-        }
-        // The spec requires the COMPLETE refreshed config state in the response
-        // (a change may cascade); ours are independent, but the contract holds.
-        return { configOptions: configOptionsFor(rec.agent, directory, rec.pendingSwitches) }
-      },
-    }
-  }
-
-  // --- Connection lifecycle --------------------------------------------------
-
-  // The transport stream. Production wires stdio (stdout carries the protocol);
-  // tests inject an in-memory pipe pair via config.stream to drive the bridge
-  // without a subprocess. ndJsonStream is the SDK's stdio framing helper. The
-  // AgentSideConnection constructor synchronously invokes makeAgent (assigning
-  // the outer `conn`), so `conn` is set before any agent method runs.
-  /* v8 ignore next 4 -- production stdio wiring; tests always inject config.stream */
-  const stream: Stream = config.stream ?? ndJsonStream(
-    Writable.toWeb(process.stdout) as WritableStream<Uint8Array>,
-    Readable.toWeb(process.stdin) as ReadableStream<Uint8Array>,
-  )
-  conn = new AgentSideConnection(makeAgent, observeOutbound(stream, announceInitialCommands))
-
-  /**
-   * Tear ALL live sessions down to quiescence (docs/defensive-patterns.md "dispose must reach
-   * quiescence"): for each session settle any pending prompt `cancelled`, then
-   * run that session's {@link AgentHandle} `dispose()` — which stops the loop
-   * (sets `disposed`, aborts the in-flight step), AWAITS the loop's exit (the
-   * final `turn/end` + `session/flush` are captured while the store-owned publication hooks are still
-   * attached), unregisters the agent, and removes its session from the store.
-   * The per-session disposes run in parallel. Idempotent — clears the `sessions`
-   * map first and memoizes, so a second call (close racing dispose) is a no-op.
-   * Shared by Cordis disposal AND client disconnect (`conn.closed`).
-   *
-   * Per-agent disposal closes the queued-before-run window through the DISPOSED
-   * path, not `cancel()`: the start-disposer resolves `handle.disposed`, which
-   * wakes the parked loop, and `isDisposed()` breaks the loop before a
-   * queued-but-not-yet-running turn can start (a turn cut off mid-flight ends
-   * with reason `disposed`, not `aborted`). A bare client disconnect (resolves
-   * `conn.closed` WITHOUT disposing the fiber) thus leaves NO registered agent
-   * and NO session-store entry — not an idled-but-still-registered one. When the
-   * fiber IS disposed (whole-context or an ACP-only HMR
-   * `acpFiber.dispose()`), this same memoized teardown runs first; the factory's
-   * register+start+session effects are ALSO bound to the bridge fiber (the
-   * factory is reached through this bridge's traceable service proxy, so
-   * `AgentLoop.start`'s `this.ctx.effect(...)` binds to the CALLER context — the
-   * bridge fiber), so any agent this path did not reach is still reclaimed by
-   * fiber disposal.
-   */
-  let quiescing: Promise<void> | undefined
-  const quiesce = (): Promise<void> => {
-    // Memoize: disposal and client-disconnect can both fire. The first call owns
-    // the teardown; later callers await the SAME promise so `fiber.dispose()`
-    // never returns before an in-flight close teardown has finished.
-    if (quiescing !== undefined) return quiescing
-    // Mark closed BEFORE draining: a `session/load` mid-`resume()` (no record
-    // installed yet) must observe this after its await and refuse to install a
-    // post-teardown record. Set even when there are no live sessions.
-    closed = true
-    pendingCommandSnapshots.clear()
-    const recs = [...sessions.values()]
-    sessions.clear()
-    if (recs.length === 0) return Promise.resolve()
-    quiescing = (async () => {
-      await Promise.all(recs.map(async (rec) => {
-        settlePrompt(rec, 'cancelled')
-        rec.commandAbort?.abort(new Error('ACP connection closed'))
-        rec.promptPreparation?.abort(new Error('ACP connection closed'))
-        // Per-agent dispose (the AgentHandle disposer): unregister this agent,
-        // stop its loop (sets disposed + aborts the in-flight step), await
-        // quiescence (the loop exit + final flush), and remove its session — so
-        // a bare client disconnect leaves NO registered agent and NO
-        // session-store entry, not just an idled-but-still-registered one.
-        await rec.dispose()
-      }))
-    })()
-    return quiescing
-  }
-
-  // Client disconnect: when the ACP transport closes (editor quits, pipe EOF),
-  // the in-flight turn would otherwise keep running and its `session/update`
-  // writes would be silently swallowed by `notify()`. Tear the session down so
-  // a vanished client does not leave an orphaned running agent. `conn.closed`
-  // rejects/resolves once; contain any teardown throw (nothing else can act on
-  // it — the connection is already gone). The Cordis disposer below still runs
-  // on normal shutdown and is idempotent with this.
-  /* v8 ignore start -- the .catch arrow is a defensive guard: conn.closed
-     settling rejected or quiesce() throwing on an already-closed connection is
-     not reproducible through the in-memory test transport (it never severs
-     mid-run), and there is nothing else to act on once the connection is gone —
-     the swallow mirrors notify(). */
-  void conn.closed.then(quiesce).catch((error: unknown) => {
-    logger.warn(`acp: connection-close teardown failed: ${String(error)}`)
-  })
-  /* v8 ignore stop */
-
-  ctx.effect(() => quiesce, 'acp.connection')
-}
-
-/**
- * Build per-agent options from the plugin config, omitting absent fields
- * (exactOptionalPropertyTypes: never assign `undefined` to an optional key).
- * Exported for unit coverage of both the present and absent branches.
- * @param config - the plugin config carrying the optional provider/model target.
- * @returns the per-agent options, with each configured target field present.
- */
-export function agentOptions(config: AcpConfig): { provider?: string; model?: string } {
-  return {
-    ...config.provider !== undefined ? { provider: config.provider } : {},
-    ...config.model !== undefined ? { model: config.model } : {},
-  }
-}
-
-/**
- * Validate the `cwd`/`additionalDirectories` contract shared by `session/new`
- * and `session/load`: `cwd` must be absolute (a relative path would be ambiguous
- * as a workspace root). The persisted-cwd equality check for `session/load`
- * happens after the metadata lookup; this validator only enforces request shape:
- *  - `session/new`: the validated `cwd` becomes the session's `SessionHeader.cwd`
- *    (via `agents.create({meta:{cwd}})`) and thus the default bash workdir.
- *  - `session/load`: the request `cwd` must be absolute AND must match the
- *    PERSISTED `header.cwd`, which stays authoritative for the bash workdir —
- *    the request cwd does not override it.
- * Any absolute path is accepted (the per-session cwd flows to the bash executor
- * — see `dsh-tool-bash`), so the server no longer has to launch in the
- * workspace. `additionalDirectories` must still be empty: widening the
- * tool/filesystem scope beyond the single cwd is a separate, unimplemented
- * concern (a sandbox seam), and silently ignoring extra roots would desync the
- * client's filesystem-scope UI. Both request shapes carry `cwd: string` and
- * `additionalDirectories?: string[]`, so one validator covers both.
- */
-function validateWorkspaceParams(params: { cwd: string; additionalDirectories?: string[] }): void {
-  if (!isAbsolute(params.cwd)) {
-    throw invalidParams(`cwd must be an absolute path: ${params.cwd}`)
-  }
-  if (params.additionalDirectories !== undefined && params.additionalDirectories.length > 0) {
-    throw invalidParams('additionalDirectories is not supported in this MVP')
-  }
-}
-
-function validateMcpServers(params: { mcpServers?: unknown[] }): void {
-  if (params.mcpServers !== undefined && params.mcpServers.length > 0) {
-    throw invalidParams('mcpServers is not supported in this MVP')
-  }
-}
-
-/**
- * Translate a single harness {@link SessionEvent} into the `session/update`
- * notification(s) it produces, pushing each via `notify`. Shared by live
- * streaming (`session/event`) and `session/load` replay so both paths emit an
- * identical update stream from the same event log.
- *
- * - `assistant/chunk` text-delta/reasoning-delta → message/thought chunks
- * - `llm/retry` and terminal model failure → visible discarded-attempt markers
- * - `user/message` → `user_message_chunk` during load replay only — so a
- *   loaded transcript reconstructs the USER side of each turn without echoing
- *   a live `session/prompt` back to the client
- * - `tool/call`   → `tool_call` (pending)
- * - appended `tool/result` → `tool_call_update` (completed/failed)
- * - replacement `tool/result` → no update (context rewrite, not execution)
- *
- * Tool-call presentation (title/kind/rawInput, and the completed-state content)
- * is owned by each TOOL via `presentCall`/`presentResult` — the bridge never
- * special-cases tool names. `presenter` resolves those from the tool registry
- * and remembers each call's `(name, args)` so the completed `tool/result` (which
- * carries neither) can find its tool. A {@link nullToolPresenter} gives the
- * generic fallback (title = tool name, raw args as input) when no registry is
- * available (e.g. pure translator tests).
- *
- * Other event types (turn/step boundaries, context/message, …) produce
- * no client update.
- * @param sessionId - the ACP session id stamped on every emitted notification.
- * @param event - the harness session event to translate.
- * @param notify - sink for each produced `session/update` notification; called
- * zero or more times per event (best-effort UI feed, never load-bearing).
- * @param presenter - resolves tool-owned render intent for tool events;
- * defaults to the generic-fallback {@link nullToolPresenter}.
- * @param terminal - the session's terminal-rendering context; defaults to
- * disabled (the plain-text console-block fallback).
- * @param options - `includeUserMessages` (default `true`): live streaming
- * passes `false` so a prompt the client just sent is not echoed back.
- */
-export function streamSessionEventUpdate(
-  sessionId: SessionId,
-  event: SessionEvent,
-  notify: (notification: SessionNotification) => void,
-  presenter: Pick<ToolPresenter, 'call' | 'result'> = nullToolPresenter,
-  terminal: TerminalRendering = noTerminalRendering,
-  options: { includeUserMessages?: boolean } = {},
-): void {
-  const includeUserMessages = options.includeUserMessages ?? true
-  switch (event.type) {
-    case 'assistant/chunk': {
-      const chunk = event.data.chunk
-      if (chunk.type === 'text-delta') {
-        notify({ sessionId, update: { sessionUpdate: 'agent_message_chunk', content: { type: 'text', text: chunk.text } } })
-      } else if (chunk.type === 'reasoning-delta') {
-        notify({ sessionId, update: { sessionUpdate: 'agent_thought_chunk', content: { type: 'text', text: chunk.text } } })
-      }
-      return
-    }
-    case 'llm/retry': {
-      const text = '\n\n[Previous model attempt discarded; retrying '
-        + `${event.data.retry}/${event.data.maxRetries} in ${event.data.delayMs}ms: `
-        + `${event.data.failure.message}]\n\n`
-      notify({ sessionId, update: { sessionUpdate: 'agent_message_chunk', content: { type: 'text', text } } })
-      return
-    }
-    case 'user/message': {
-      if (!includeUserMessages) return
-      // Replay the user's prompt so a loaded session shows both sides of each
-      // turn. Live prompt turns suppress this path to avoid duplicating what
-      // the client just sent.
-      for (const block of displayPromptContent(event.data)) {
-        const content = harnessBlockToAcpContent(block)
-        if (content !== undefined) {
-          notify({ sessionId, update: { sessionUpdate: 'user_message_chunk', content } })
-        }
-      }
-      return
-    }
-    case 'tool/call': {
-      const view = presenter.call(event.data.callId, event.data.name, event.data.arguments)
-      notify({ sessionId, update: toolCallUpdate(event.data.callId, view, terminal) })
-      return
-    }
-    case 'tool/result': {
-      // Replacements (for example model-free pruning) are transcript rewrites,
-      // not repeated tool executions. Re-presenting one would consume no
-      // pending call and could clobber the original terminal/diff completion.
-      if (event.surfaceOp !== undefined && event.surfaceOp !== 'append') return
-      const view = presenter.result(event.data.callId, event.data.content, event.data.isError, event.data.meta)
-      notify({ sessionId, update: toolResultUpdate(event.data.callId, view, event.data.isError, terminal) })
-      return
-    }
-    case 'todo/write': {
-      notify({ sessionId, update: { sessionUpdate: 'plan', ...todosToPlan(event.data.todos) } })
-      return
-    }
-    case 'session/title': {
-      notify({
-        sessionId,
-        update: {
-          sessionUpdate: 'session_info_update',
-          title: event.data.title,
-          updatedAt: new Date(event.time).toISOString(),
-        },
-      })
-      return
-    }
-    case 'turn/end': {
-      if (event.data.reason.kind !== 'error' || !('failure' in event.data.reason)) return
-      const text = `\n\n[Model attempt failed; any partial output above is discarded: ${event.data.reason.failure.message}]\n\n`
-      notify({ sessionId, update: { sessionUpdate: 'agent_message_chunk', content: { type: 'text', text } } })
-      return
-    }
-    // non-error turn/step boundaries, context/message, steering,
-    // assistant/message — no direct ACP client update.
-    default:
-      return
-  }
-}
-
-/**
- * Map a whole harness todo list to an ACP replacement plan, using medium
- * priority because harness todos do not carry one.
- * @param todos - complete harness todo list.
- * @returns one ACP plan entry per todo.
- */
-export function todosToPlan(todos: TodoItem[]): Plan {
-  return { entries: todos.map((todo): PlanEntry => ({ content: todo.content, priority: 'medium', status: todo.status })) }
-}
-
-/** Per-session terminal capability and workspace used while translating updates. */
-export interface TerminalRendering {
-  enabled: boolean
-  /** The session workspace cwd (terminal-card header default); `undefined` when the session has none. */
-  cwd: string | undefined
-}
-
-/** Default: terminal rendering off (the ` ```console ` text fallback path). */
-const noTerminalRendering: TerminalRendering = { enabled: false, cwd: undefined }
-
-/**
- * Resolve tool-owned call/result views with a generic fallback. Per-session
- * state correlates results with call arguments; interrupted calls may retain an
- * entry only until that session's presenter is discarded.
- */
-export class ToolPresenter {
-  private readonly pending = new Map<CallId, { name: string; args: unknown; card: ToolCallView['card'] }>()
-
-  /**
-   * @param tools - registry used to resolve executing definitions.
-   * @param onError - contained presenter-error sink before generic fallback.
-   * @param agent - optional scoped registry view for the executing agent.
-   */
-  constructor(
-    private readonly tools: Pick<ToolRegistry, 'get'>,
-    private readonly onError: (message: string) => void = () => {},
-    private readonly agent?: Agent,
-  ) {}
-
-  /**
-   * Pending-state render intent for a `tool/call`; remembers `(name, args, card)`
-   * for the matching result.
-   * @param callId - the call id the matching `tool/result` will look up.
-   * @param name - the tool name, resolved against the registry for `presentCall`.
-   * @param argsJson - raw event arguments parsed for presentation.
-   * @returns the tool-owned view or generic fallback.
-   */
-  call(callId: CallId, name: string, argsJson: string): ToolCallView {
-    const args = parseToolArguments(argsJson)
-    let present: ToolCallView | undefined
-    try {
-      present = this.tools.get(name, this.agent)?.presentCall?.(args)
-    } catch (error: unknown) {
-      // A throwing presentCall must not break streaming: log and fall back.
-      this.onError(`acp: tool "${name}" presentCall threw, using generic presentation: ${String(error)}`)
-      present = undefined
-    }
-    // Tool names never imply presentation kind; richer cards are tool-owned.
-    const view: ToolCallView = present ?? { card: 'generic', title: name, kind: 'other', rawInput: args }
-    this.pending.set(callId, { name, args, card: view.card })
-    return view
-  }
-
-  /**
-   * Completed-state render intent for a `tool/result`; consumes the remembered
-   * `(name, args, card)`.
-   * @param callId - matching call id; unknown or late ids use raw content.
-   * @param content - result content used by the fallback and fill-in body.
-   * @param isError - whether the result is an error, forwarded to `presentResult`.
-   * @param meta - the result's machine-readable meta, forwarded when present.
-   * @returns a normalized tool-owned view or raw-content fallback.
-   */
-  result(callId: CallId, content: ContentBlock[], isError: boolean, meta?: JsonValue): ToolResultView {
-    const call = this.pending.get(callId)
-    this.pending.delete(callId)
-    // No remembered call (unknown/late callId) → nothing to present from; raw content.
-    if (call === undefined) return { card: 'generic', content }
-    let present: ToolResultView | undefined
-    try {
-      present = this.tools.get(call.name, this.agent)
-        ?.presentResult?.(call.args, { content, isError, ...meta !== undefined ? { meta } : {} })
-    } catch (error: unknown) {
-      // A throwing presentResult must not break streaming/replay: log + fall back.
-      this.onError(`acp: tool "${call.name}" presentResult threw, using raw result: ${String(error)}`)
-      present = undefined
-    }
-    if (present === undefined) return { card: 'generic', content }
-    // Orphan guard: only honor a `terminal` result when the PENDING call was a
-    // terminal. A result-only terminal with no matching call-side terminal would
-    // orphan `_meta.terminal_output` to a terminal Zed never made — drop it back
-    // to the raw content.
-    if (present.card === 'terminal' && call.card !== 'terminal') return { card: 'generic', content }
-    // A generic result that reformats no content keeps the RAW result content
-    // (the tool replaced only the title); fill it so the card is never blanked.
-    if (present.card === 'generic' && present.content === undefined) return { ...present, content }
-    return present
-  }
-}
-
-/**
- * The no-op presenter used when no tool registry is available (e.g. the pure
- * translator tests): every tool gets the generic fallback presentation, and
- * results pass their raw content through unchanged.
- */
-export const nullToolPresenter: Pick<ToolPresenter, 'call' | 'result'> = {
-  call: (_callId, name, argsJson) => ({ card: 'generic', title: name, kind: 'other', rawInput: parseToolArguments(argsJson) }),
-  result: (_callId, content) => ({ card: 'generic', content }),
-}
-
-/** Parse a tool-call arguments JSON string for `rawInput`; raw string on failure. */
-function parseToolArguments(args: string): unknown {
-  try {
-    return args ? JSON.parse(args) : {}
-  } catch {
-    // The model produced non-JSON arguments; surface the raw string rather
-    // than dropping it. (The harness tool layer handles validation; here we
-    // only feed the client's tool-call UI.)
-    return args
-  }
-}
-
-/** Map harness tool-result content blocks to ACP tool-call content (text only). */
-function toolResultContent(blocks: ContentBlock[]): { type: 'content'; content: AcpContentBlock }[] {
-  const out: { type: 'content'; content: AcpContentBlock }[] = []
-  for (const block of blocks) {
-    const content = harnessBlockToAcpContent(block)
-    if (content !== undefined) out.push({ type: 'content', content })
-  }
-  return out
-}
-
-/** The `session/update` payload for a `tool_call` / `tool_call_update`. */
-type ToolCallSessionUpdate = SessionNotification['update']
-
-/** An ACP tool-call content block (a text/image `content`, a `diff`, or a `terminal`). */
-type AcpToolCallContent =
-  | { type: 'content'; content: AcpContentBlock }
-  | { type: 'diff'; path: string; oldText: string | null; newText: string }
-  | { type: 'terminal'; terminalId: string }
-
-/** Relativize only in-workspace title text; location and diff paths stay raw. */
-function displayTitle(title: string, rawPath: string | undefined, sessionCwd: string | undefined): string {
-  if (rawPath === undefined || sessionCwd === undefined || !isAbsolute(rawPath) || !isAbsolute(sessionCwd)) return title
-  const rel = relativePath(sessionCwd, rawPath)
-  // Test the `..` segment, not a character prefix: `..cache/x` is in-workspace.
-  if (rel.length === 0 || rel === '..' || rel.startsWith(`..${pathSep}`)) return title
-  return title.split(rawPath).join(rel)
-}
-
-/**
- * Resolve the terminal card's header cwd. A `TerminalCallView.cwd` (a model
- * `workdir`) wins when ABSOLUTE; a RELATIVE one resolves against the session cwd
- * (matching how `dsh-tool-bash` resolves a relative workdir for execution, so the
- * header matches where the command actually ran); when the view gives no cwd, the
- * session workspace cwd is the default. Returns `undefined` only when neither the
- * view nor the session supplies one (Zed then shows "current directory").
- */
-function terminalCwd(viewCwd: string | undefined, sessionCwd: string | undefined): string | undefined {
-  if (viewCwd === undefined) return sessionCwd
-  if (isAbsolute(viewCwd)) return viewCwd
-  return sessionCwd !== undefined ? resolvePath(sessionCwd, viewCwd) : viewCwd
-}
-
-/**
- * Build the `tool_call` (pending) `session/update` from a tool's render intent.
- * Switches on `view.card`: a `generic` card maps title/kind/rawInput/content/
- * locations; a `diff` card emits `{ type: 'diff' }` content blocks (the editor's
- * inline diff) plus follow-along locations; a `terminal` card renders as a
- * terminal when the client is capable (a `terminal` content block + the
- * `_meta.terminal_info` cwd header) and otherwise falls back to a generic execute
- * card whose body is the description. File-card titles are relativized against the
- * session cwd (see {@link displayTitle}).
- */
-function toolCallUpdate(callId: CallId, view: ToolCallView, terminal: TerminalRendering): ToolCallSessionUpdate {
-  switch (view.card) {
-    case 'generic':
-      return {
-        sessionUpdate: 'tool_call',
-        toolCallId: callId,
-        // Relativize the title against the session cwd when the card carries a
-        // file location (a read/file card); a location-less card (bash, todo)
-        // has no path to relativize, so the title is used as-is.
-        title: displayTitle(view.title, view.locations?.[0]?.path, terminal.cwd),
-        kind: view.kind ?? 'other',
-        status: 'in_progress',
-        ...view.rawInput !== undefined ? { rawInput: view.rawInput } : {},
-        ...view.locations !== undefined ? { locations: view.locations } : {},
-        ...view.content !== undefined && view.content.length > 0 ? { content: toolResultContent(view.content) } : {},
-      }
-    case 'diff': {
-      const rawPath = view.locations?.[0]?.path ?? view.diffs[0]?.path
-      const content: AcpToolCallContent[] = view.diffs.map(d => ({ type: 'diff', path: d.path, oldText: d.oldText, newText: d.newText }))
-      return {
-        sessionUpdate: 'tool_call',
-        toolCallId: callId,
-        title: displayTitle(view.title, rawPath, terminal.cwd),
-        kind: 'edit',
-        status: 'in_progress',
-        ...view.locations !== undefined ? { locations: view.locations } : {},
-        ...content.length > 0 ? { content } : {},
-      }
-    }
-    case 'terminal': {
-      // A terminal-rendered call gets a terminal CARD when the client supports it:
-      // the description renders ABOVE the card, then the terminal block, plus
-      // `_meta.terminal_info` (the cwd header). Without the capability it is an
-      // ordinary execute card whose body is the description and whose rawInput is
-      // the command; the output arrives as text on the result.
-      const asTerminal = terminal.enabled
-      const description: AcpToolCallContent[] = view.description !== undefined
-        ? [{ type: 'content', content: { type: 'text', text: view.description } }]
-        : []
-      const content: AcpToolCallContent[] = [
-        ...description,
-        ...asTerminal ? [{ type: 'terminal' as const, terminalId: callId }] : [],
-      ]
-      return {
-        sessionUpdate: 'tool_call',
-        toolCallId: callId,
-        title: view.title,
-        kind: 'execute',
-        status: 'in_progress',
-        rawInput: view.title,
-        ...content.length > 0 ? { content } : {},
-        ...asTerminal
-          ? { _meta: { terminal_info: { terminal_id: callId, cwd: terminalCwd(view.cwd, terminal.cwd) } } }
-          : {},
-      }
-    }
-    default:
-      return assertNever(view, 'ToolCallView.card')
-  }
-}
-
-/** The `terminal_exit` `_meta` entry for a completed terminal call. */
-interface TerminalExitMeta {
-  terminal_exit?: { terminal_id: string; exit_code?: number; signal?: string }
-}
-
-/**
- * Build the optional `terminal_exit` portion of a `tool_call_update`'s `_meta`
- * from a terminal result: a `signal` death yields `{signal}`, an `exitCode`
- * yields `{exit_code}`, and neither yields nothing (the card simply shows no exit
- * pill). Spread into the `_meta` object alongside `terminal_output`.
- */
-function terminalExitMeta(callId: string, view: TerminalResultView): TerminalExitMeta {
-  if (view.signal !== undefined) return { terminal_exit: { terminal_id: callId, signal: view.signal } }
-  if (view.exitCode !== undefined) return { terminal_exit: { terminal_id: callId, exit_code: view.exitCode } }
-  return {}
-}
-
-/**
- * Build the `tool_call_update` (completed) `session/update` from a result render
- * intent. A `generic` result sends its reformatted content (or the raw result);
- * a `terminal` result rides its output/exit on `_meta` when the client is capable
- * (the terminal card consumes them and `content` is OMITTED — a
- * `tool_call_update.content` REPLACES the call's content collection in Zed, so
- * re-sending would clobber the terminal block the call installed) and otherwise
- * derives the fenced ```console fallback from `output`. A `diff` result emits its
- * `{ type: 'diff' }` content blocks (an applied hunk, or a whole-file diff for a
- * create), which replace the diff the call installed — so the model-facing result
- * text can never clobber it.
- */
-function toolResultUpdate(callId: CallId, view: ToolResultView, isError: boolean, terminal: TerminalRendering): ToolCallSessionUpdate {
-  const status = isError ? 'failed' as const : 'completed' as const
-  switch (view.card) {
-    case 'terminal': {
-      const output = view.output ?? ''
-      if (terminal.enabled) {
-        return {
-          sessionUpdate: 'tool_call_update',
-          toolCallId: callId,
-          status,
-          ...view.title !== undefined ? { title: view.title } : {},
-          _meta: {
-            terminal_output: { terminal_id: callId, data: output },
-            ...terminalExitMeta(callId, view),
-          },
-        }
-      }
-      // No terminal capability: the bridge derives the fenced ```console fallback.
-      const fenced = `\`\`\`console\n${output.replace(/\n+$/, '')}\n\`\`\``
-      return {
-        sessionUpdate: 'tool_call_update',
-        toolCallId: callId,
-        status,
-        content: [{ type: 'content', content: { type: 'text', text: fenced } }],
-        ...view.title !== undefined ? { title: view.title } : {},
-      }
-    }
-    case 'generic':
-      return {
-        sessionUpdate: 'tool_call_update',
-        toolCallId: callId,
-        status,
-        // The presenter fills a generic result's content from the raw result, so
-        // `content` is always defined here; the guard keeps this total for a
-        // directly-constructed view.
-        /* v8 ignore next -- content always defined via the presenter (see above) */
-        ...view.content !== undefined ? { content: toolResultContent(view.content) } : {},
-        ...view.title !== undefined ? { title: view.title } : {},
-      }
-    case 'diff': {
-      // A result-time diff: emit one `{ type: 'diff' }` content block per entry
-      // (an applied hunk for an edit/overwrite, or a whole-file diff for a
-      // create), mirroring the call-side diff arm. `tool_call_update.content`
-      // REPLACES the call's content in an editor, so this result diff supersedes
-      // the diff the pending card installed (and keeps the model-facing result
-      // text from clobbering it).
-      const content: AcpToolCallContent[] = view.diffs.map(d => ({ type: 'diff', path: d.path, oldText: d.oldText, newText: d.newText }))
-      // Relativize the replacement title against the session cwd from the diff
-      // path, exactly as the call-side card does — `tool_call_update.title`
-      // replaces the card header, so a raw absolute path here would undo the
-      // pending card's relativized title.
-      const title = view.title !== undefined ? displayTitle(view.title, view.diffs[0]?.path, terminal.cwd) : undefined
-      return {
-        sessionUpdate: 'tool_call_update',
-        toolCallId: callId,
-        status,
-        ...content.length > 0 ? { content } : {},
-        ...title !== undefined ? { title } : {},
-      }
-    }
-    default:
-      return assertNever(view, 'ToolResultView.card')
-  }
-}
diff --git a/packages/ui/acp/tests/approval.spec.ts b/packages/ui/acp/tests/approval.spec.ts
deleted file mode 100644
index 65679cd905..0000000000
--- a/packages/ui/acp/tests/approval.spec.ts
+++ /dev/null
@@ -1,113 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { CallId } from '@deepseek-ai/dsh-llm'
-import { type Agent } from '@deepseek-ai/dsh-agent'
-
-import ApprovalService, { type ApprovalRequest } from '@deepseek-ai/dsh-user-approval'
-import { makeBridgeHarness, type BridgeHarness } from './harness.ts'
-import { SessionId } from '@deepseek-ai/dsh-session'
-
-/**
- * The bridge's `approval/request` answerer: an ask for an agent the bridge
- * owns becomes a `session/request_permission` prompt attached to the tool
- * call; foreign or call-less requests delegate down to the fail-closed
- * default. Driven through `ctx.approval` — the same path dsh-tools' ask
- * routing takes — against the harness's scriptable client.
- */
-describe('acp bridge — approval answerer', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-approval-')) })
-  afterEach(async () => {
-    await harness?.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  async function ownedAgentRequest(
-    h: BridgeHarness, overrides: Partial<ApprovalRequest> = {},
-  ): Promise<{ agent: Agent; request: ApprovalRequest }> {
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = h.ctx.agents.get(SessionId(sessionId))
-    if (agent === undefined) throw new Error('newSession created no agent')
-    // In production an ask always fires mid-turn (tool execution); open one so
-    // request()'s turn-enclosure precondition holds for the direct drive below.
-    agent.session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
-    return { agent, request: { agent, toolName: 'echo', callId: CallId('call-9'), ...overrides } }
-  }
-
-  it('prompts the editor for an owned agent and maps allow-once → allowed-once', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.ctx.plugin(ApprovalService)
-    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'allow-once' } })
-
-    const { request } = await ownedAgentRequest(harness)
-    await expect(harness.ctx.approval.request(request)).resolves.toBe('allowed-once')
-
-    expect(harness.permissionRequests).toHaveLength(1)
-    const wire = harness.permissionRequests[0]
-    expect(wire?.toolCall).toEqual({ toolCallId: 'call-9' })
-    expect(wire?.options.map(o => ({ optionId: o.optionId, kind: o.kind }))).toEqual([
-      { optionId: 'allow-once', kind: 'allow_once' },
-      { optionId: 'reject-once', kind: 'reject_once' },
-    ])
-  })
-
-  it('maps reject-once → rejected', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.ctx.plugin(ApprovalService)
-    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'reject-once' } })
-
-    const { request } = await ownedAgentRequest(harness)
-    await expect(harness.ctx.approval.request(request)).resolves.toBe('rejected')
-  })
-
-  it('maps a client cancellation → cancelled', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.ctx.plugin(ApprovalService)
-    harness.onPermission = () => ({ outcome: { outcome: 'cancelled' } })
-
-    const { request } = await ownedAgentRequest(harness)
-    await expect(harness.ctx.approval.request(request)).resolves.toBe('cancelled')
-  })
-
-  it('treats an unknown optionId from a non-conforming client as a rejection, never a grant', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.ctx.plugin(ApprovalService)
-    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'allow-always-i-insist' } })
-
-    const { request } = await ownedAgentRequest(harness)
-    await expect(harness.ctx.approval.request(request)).resolves.toBe('rejected')
-  })
-
-  it('delegates a foreign agent down to the fail-closed default', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.ctx.plugin(ApprovalService)
-    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'allow-once' } })
-
-    const { agent } = await ownedAgentRequest(harness)
-    // Even an impostor that claims the bridge-owned session id must delegate:
-    // ownership requires the exact Agent object stored in the session record.
-    const foreign = {
-      session: { id: agent.session.id, events: [{ type: 'turn/start' }], append: () => ({}) },
-    } as unknown as Agent
-    await expect(harness.ctx.approval.request({ agent: foreign, toolName: 'echo', callId: CallId('c') }))
-      .resolves.toBe('unavailable')
-    expect(harness.permissionRequests).toHaveLength(0)
-  })
-
-  it('delegates a call-less request — the protocol prompt must attach to a tool call', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.ctx.plugin(ApprovalService)
-    harness.onPermission = () => ({ outcome: { outcome: 'selected', optionId: 'allow-once' } })
-
-    const { agent } = await ownedAgentRequest(harness)
-    await expect(harness.ctx.approval.request({ agent, toolName: 'echo' })).resolves.toBe('unavailable')
-    expect(harness.permissionRequests).toHaveLength(0)
-  })
-})
diff --git a/packages/ui/acp/tests/bridge.spec.ts b/packages/ui/acp/tests/bridge.spec.ts
deleted file mode 100644
index 1e15910ce7..0000000000
--- a/packages/ui/acp/tests/bridge.spec.ts
+++ /dev/null
@@ -1,468 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { makeBridgeHarness, textResponse, toolCallResponse, type BridgeHarness } from './harness.ts'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import { encodeSessionReferenceUri, formatSessionReferenceMention } from '@deepseek-ai/dsh-session-reference'
-
-/**
- * End-to-end bridge specs over an in-memory transport: a real
- * ClientSideConnection drives the bridge's AgentSideConnection, so every
- * assertion exercises actual JSON-RPC framing and the harness event taxonomy.
- */
-describe('acp bridge', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => {
-    storageDir = await mkdtemp(join(tmpdir(), 'acp-test-'))
-  })
-
-  afterEach(async () => {
-    // e2e/integration tests own their resources (docs/testing.md): dispose even on
-    // failure so a flaky run never leaks a context or persistence dir.
-    if (harness) await harness.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('initialize negotiates the protocol version and advertises capabilities', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    const res = await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    expect(res.protocolVersion).toBe(PROTOCOL_VERSION)
-    expect(res.agentCapabilities?.loadSession).toBe(true)
-    expect(res.agentCapabilities?.promptCapabilities).toMatchObject({ image: false, audio: false })
-    expect(res.agentInfo).toEqual({ name: 'deepseek-harness-acp', version: '0.0.1' })
-  })
-
-  it('session/new creates a session and a full prompt turn streams text then settles end_turn', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('hello there')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(sessionId).toBeTruthy()
-
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'hi' }] })
-    expect(res.stopReason).toBe('end_turn')
-
-    // The streamed text arrived as agent_message_chunk updates.
-    const text = harness.updates
-      .filter(u => u.sessionUpdate === 'agent_message_chunk')
-      .map(u => (u.content.type === 'text' ? u.content.text : ''))
-      .join('')
-    expect(text).toBe('hello there')
-  })
-
-  it('routes ask_user_question through ACP form elicitation and continues with the selected option', async () => {
-    harness = await makeBridgeHarness({
-      storageDir,
-      withAskUser: true,
-      script: [
-        toolCallResponse('ask-1', 'ask_user_question', {
-          questions: [{
-            id: 'language',
-            header: 'Project config',
-            question: 'Which language should I use?',
-            options: [
-              { label: 'TypeScript', description: 'Good for UI apps' },
-              { label: 'Python', description: 'Good for scripts' },
-            ],
-          }],
-        }),
-        textResponse('Python it is.'),
-      ],
-    })
-    harness.onElicitation = () => ({ action: 'accept', content: { choice: 'Python' } })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    const result = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'ask me' }] })
-
-    expect(result.stopReason).toBe('end_turn')
-    expect(harness.elicitationRequests).toHaveLength(1)
-    expect(harness.elicitationRequests[0]).toMatchObject({
-      sessionId,
-      mode: 'form',
-      message: 'Which language should I use?',
-      requestedSchema: {
-        title: 'Project config',
-        properties: {
-          choice: {
-            oneOf: [
-              { const: 'TypeScript', title: 'TypeScript: Good for UI apps' },
-              { const: 'Python', title: 'Python: Good for scripts' },
-            ],
-          },
-          custom: { type: 'string' },
-        },
-        required: [],
-      },
-    })
-    const toolResult = harness.ctx.agents.get(SessionId(sessionId))!.session.events.find(event => event.type === 'tool/result')
-    const toolResultBlock = toolResult?.type === 'tool/result' ? toolResult.data.content[0] : undefined
-    const toolResultText = toolResultBlock?.type === 'text' ? toolResultBlock.text : undefined
-    expect(toolResultText).toBe('{"answers":[{"id":"language","selected":["Python"]}]}')
-  })
-
-  it('routes optionless ask_user_question through an ACP free-form answer field', async () => {
-    harness = await makeBridgeHarness({
-      storageDir,
-      withAskUser: true,
-      script: [
-        toolCallResponse('ask-1', 'ask_user_question', {
-          questions: [{ id: 'name', question: 'What should I name it?' }],
-        }),
-        textResponse('Name recorded.'),
-      ],
-    })
-    harness.onElicitation = () => ({ action: 'accept', content: { custom: 'apollo' } })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'ask me' }] })
-
-    expect(harness.elicitationRequests[0]).toMatchObject({
-      requestedSchema: {
-        properties: { custom: { type: 'string', title: 'What should I name it?' } },
-        required: ['custom'],
-      },
-    })
-    const toolResult = harness.ctx.agents.get(SessionId(sessionId))!.session.events.find(event => event.type === 'tool/result')
-    expect(JSON.stringify(toolResult)).toContain('apollo')
-  })
-
-  it('supports ACP custom answers alongside choices', async () => {
-    harness = await makeBridgeHarness({ storageDir, withAskUser: true })
-    harness.onElicitation = () => ({ action: 'accept', content: { custom: 'Use Zig' } })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-
-    const result = await harness.ctx.userInteraction.ask({
-      agent,
-      questions: [{
-        id: 'language',
-        question: 'Which language?',
-        detail: 'Choose the implementation language for this project.',
-        options: [{ label: 'TypeScript' }],
-      }],
-    })
-
-    expect(result).toEqual({ answers: [{ id: 'language', selected: [], custom: 'Use Zig' }] })
-    expect(harness.elicitationRequests[0]).toMatchObject({
-      message: 'Which language?\n\nChoose the implementation language for this project.',
-      requestedSchema: {
-        properties: {
-          choice: {
-            title: 'Which language?',
-            description: 'Choose one option, or fill a custom answer below.',
-            oneOf: [{ const: 'TypeScript', title: 'TypeScript' }],
-          },
-          custom: { type: 'string' },
-        },
-        required: [],
-      },
-    })
-  })
-
-  it('treats ACP custom answers as overriding selected choices', async () => {
-    harness = await makeBridgeHarness({ storageDir, withAskUser: true })
-    harness.onElicitation = () => ({ action: 'accept', content: { choice: 'TypeScript', custom: 'Use Zig' } })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-
-    await expect(harness.ctx.userInteraction.ask({
-      agent,
-      questions: [{
-        id: 'language',
-        question: 'Which language?',
-        options: [{ label: 'TypeScript' }],
-      }],
-    })).resolves.toEqual({ answers: [{ id: 'language', selected: [], custom: 'Use Zig' }] })
-  })
-
-  it('supports ACP multi-select answers', async () => {
-    harness = await makeBridgeHarness({ storageDir, withAskUser: true })
-    harness.onElicitation = () => ({ action: 'accept', content: { choice: ['Tests', 'Docs'] } })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-
-    await expect(harness.ctx.userInteraction.ask({
-      agent,
-      questions: [{
-        id: 'targets',
-        question: 'Pick',
-        options: [{ label: 'Tests' }, { label: 'Docs' }],
-        multiSelect: true,
-      }],
-    })).resolves.toEqual({ answers: [{ id: 'targets', selected: ['Tests', 'Docs'] }] })
-  })
-
-  it('reports ACP ask-user routing and answer failures as structured errors', async () => {
-    harness = await makeBridgeHarness({ storageDir, withAskUser: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-
-    await expect(harness.ctx.userInteraction.ask({ questions: [{ id: 'x', question: 'No agent?' }] }))
-      .rejects.toMatchObject({ name: 'UserInteractionError', code: 'NO_AGENT' })
-    const impostor = { session: { id: agent.session.id } } as typeof agent
-    await expect(harness.ctx.userInteraction.ask({ agent: impostor, questions: [{ id: 'x', question: 'No session?' }] }))
-      .rejects.toMatchObject({ code: 'NO_SESSION' })
-
-    harness.onElicitation = () => ({ action: 'cancel' })
-    await expect(harness.ctx.userInteraction.ask({ agent, questions: [{ id: 'x', question: 'Cancel?' }] }))
-      .rejects.toMatchObject({ code: 'ASK_CANCELLED' })
-
-    harness.onElicitation = () => ({ action: 'accept', content: {} })
-    await expect(harness.ctx.userInteraction.ask({ agent, questions: [{ id: 'x', question: 'Empty?' }] }))
-      .rejects.toMatchObject({ code: 'NO_ANSWER' })
-
-    harness.onElicitation = () => { throw new Error('client boom') }
-    await expect(harness.ctx.userInteraction.ask({ agent, questions: [{ id: 'x', question: 'Client fails?' }], signal: new AbortController().signal }))
-      .rejects.toMatchObject({ code: 'ASK_FAILED' })
-  })
-
-  it('aborts ACP ask-user requests before and while waiting for elicitation', async () => {
-    harness = await makeBridgeHarness({ storageDir, withAskUser: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-
-    const alreadyAborted = new AbortController()
-    alreadyAborted.abort()
-    await expect(harness.ctx.userInteraction.ask({ agent, questions: [{ id: 'x', question: 'Already?' }], signal: alreadyAborted.signal }))
-      .rejects.toMatchObject({ code: 'ASK_ABORTED' })
-
-    let abortedReads = 0
-    const racingAbort = {
-      get aborted() { return abortedReads++ > 0 },
-      addEventListener() {},
-      removeEventListener() {},
-      dispatchEvent() { return false },
-      onabort: null,
-      reason: undefined,
-      throwIfAborted() {},
-    } as AbortSignal
-    await expect(harness.ctx.userInteraction.ask({ agent, questions: [{ id: 'x', question: 'Raced?' }], signal: racingAbort }))
-      .rejects.toMatchObject({ code: 'ASK_ABORTED' })
-
-    let release: ((value: { action: 'accept'; content: { custom: string } }) => void) | undefined
-    harness.onElicitation = () => new Promise((resolve) => { release = resolve })
-    const pendingAbort = new AbortController()
-    const ask = harness.ctx.userInteraction.ask({ agent, questions: [{ id: 'x', question: 'Pending?' }], signal: pendingAbort.signal })
-    await new Promise(resolve => setImmediate(resolve))
-    pendingAbort.abort()
-
-    await expect(ask).rejects.toMatchObject({ code: 'ASK_ABORTED' })
-    release?.({ action: 'accept', content: { custom: 'too late' } })
-  })
-
-  it('allows multiple concurrent sessions, each with a distinct id', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const b = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(a.sessionId).toBeTruthy()
-    expect(b.sessionId).toBeTruthy()
-    expect(a.sessionId).not.toBe(b.sessionId)
-    // Both agents are live and independently registered.
-    expect(harness.ctx.agents.get(SessionId(a.sessionId))).toBeDefined()
-    expect(harness.ctx.agents.get(SessionId(b.sessionId))).toBeDefined()
-  })
-
-  it('rejects a non-absolute cwd but accepts any absolute cwd (per-session workspace)', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    // Relative cwd is still rejected (it becomes the session header / bash workdir).
-    await expect(harness.client.newSession({ cwd: 'relative/path', mcpServers: [] }))
-      .rejects.toThrow(/absolute/)
-    // An absolute cwd that differs from the server launch dir is now ACCEPTED —
-    // the per-session cwd is honored (routed to the bash workdir), so the server
-    // no longer has to launch in the workspace.
-    const res = await harness.client.newSession({ cwd: '/tmp', mcpServers: [] })
-    expect(res.sessionId).toBeTruthy()
-    // The session header records that cwd, so its bash tools run there.
-    expect(harness.ctx.agents.get(SessionId(res.sessionId))!.session.header.cwd).toBe('/tmp')
-  })
-
-  it('rejects non-empty additionalDirectories', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(harness.client.newSession({ cwd: process.cwd(), mcpServers: [], additionalDirectories: ['/x'] }))
-      .rejects.toThrow(/additionalDirectories/)
-  })
-
-  it('rejects an empty prompt without hanging', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '   ' }] }))
-      .rejects.toThrow(/empty prompt/)
-  })
-
-  it('rejects image content in a prompt (text-only capabilities)', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(harness.client.prompt({
-      sessionId,
-      prompt: [{ type: 'image', mimeType: 'image/png', data: 'AA==' }],
-    })).rejects.toThrow(/text/)
-  })
-
-  it('accepts a resource_link prompt by rendering the link into the text sent to the agent', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('ok')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const result = await harness.client.prompt({
-      sessionId,
-      prompt: [
-        { type: 'text', text: 'fix the bug in' },
-        { type: 'resource_link', uri: 'file:///x.ts', name: 'x.ts' },
-      ],
-    })
-    expect(result.stopReason).toBe('end_turn')
-    const user = harness.ctx.agents.get(SessionId(sessionId))!.session.events.find(event => event.type === 'user/message')
-    expect(JSON.stringify(user)).toContain('resource_link')
-  })
-
-  it('rejects canonical session references when the optional capability is not mounted', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(harness.client.prompt({
-      sessionId,
-      prompt: [{ type: 'resource_link', uri: encodeSessionReferenceUri(SessionId('source')), name: 'source' }],
-    })).rejects.toThrow(/session reference capability unavailable/)
-    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events).toHaveLength(0)
-  })
-
-  it('reports malformed inline session references at the ACP request boundary', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(harness.client.prompt({
-      sessionId,
-      prompt: [{ type: 'text', text: 'use dsh-session:IiJ' }],
-    })).rejects.toThrow(/invalid session reference/)
-    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events).toHaveLength(0)
-  })
-
-  it('prepares ACP session resource links and inline mentions before one atomic send', async () => {
-    harness = await makeBridgeHarness({ storageDir, withSessionReferences: true, script: [textResponse('ok')] })
-    const source = harness.ctx.sessions.create(SessionId('source'), { meta: { cwd: '/source' } })
-    source.append('user/message', {
-      content: [{ type: 'text', text: 'source background' }],
-      source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const mention = formatSessionReferenceMention({ sessionId: source.id, label: 'source-inline' })
-    const result = await harness.client.prompt({
-      sessionId,
-      prompt: [
-        { type: 'text', text: `use ${mention} and ` },
-        { type: 'resource_link', uri: encodeSessionReferenceUri(source.id), name: 'source-link' },
-      ],
-    })
-    expect(result.stopReason).toBe('end_turn')
-
-    const target = harness.ctx.agents.get(SessionId(sessionId))!.session
-    const user = target.events.find(event => event.type === 'user/message')
-    expect(user?.type === 'user/message' && user.data.envelope).toMatchObject({
-      displayContent: [{ type: 'text', text: 'use @source-inline and @source-link' }],
-      prefixContexts: [{
-        source: { kind: 'plugin', plugin: 'session-reference' },
-        meta: {
-          kind: 'session-reference',
-          references: [{ sessionId: 'source', label: 'source-inline' }],
-        },
-      }],
-    })
-    expect(target.events.some(event => event.type === 'context/message')).toBe(false)
-    const request = JSON.stringify(harness.adapter.requests[0]?.messages)
-    expect(request).toContain('untrusted, read-only snapshot')
-    expect(request).toContain('source background')
-    expect(request.indexOf('source background')).toBeLessThan(request.indexOf('## My request:'))
-    expect(request.indexOf('## My request:')).toBeLessThan(request.indexOf('use @source-inline and @source-link'))
-  })
-
-  it('rejects a failed referenced-session read before starting a turn', async () => {
-    harness = await makeBridgeHarness({ storageDir, withSessionReferences: true, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(harness.client.prompt({
-      sessionId,
-      prompt: [{ type: 'resource_link', uri: encodeSessionReferenceUri(SessionId('missing')), name: 'missing' }],
-    })).rejects.toThrow(/preparation failed/)
-    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events).toHaveLength(0)
-  })
-
-  it('cancels reference preparation before a turn is created', async () => {
-    harness = await makeBridgeHarness({ storageDir, withSessionReferences: true, script: [] })
-    const source = harness.ctx.sessions.create(SessionId('source'))
-    const snapshot = await harness.ctx.sessionQuery.readSurface(source.id)
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    let releaseRead: (() => void) | undefined
-    const readSurface = vi.spyOn(harness.ctx.sessionQuery, 'readSurface').mockImplementationOnce(async () => {
-      await new Promise<void>((resolve) => { releaseRead = resolve })
-      return snapshot
-    })
-    const pending = harness.client.prompt({
-      sessionId,
-      prompt: [{ type: 'resource_link', uri: encodeSessionReferenceUri(source.id), name: 'source' }],
-    })
-    await vi.waitFor(() => { expect(releaseRead).toBeTypeOf('function') })
-    await harness.client.cancel({ sessionId })
-    await expect(pending).resolves.toEqual({ stopReason: 'cancelled' })
-    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events).toHaveLength(0)
-    releaseRead?.()
-    await Promise.resolve()
-    readSurface.mockRestore()
-  })
-
-  it('rejects a prompt for an unknown session', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(harness.client.prompt({ sessionId: 'nope', prompt: [{ type: 'text', text: 'hi' }] }))
-      .rejects.toThrow(/unknown session/)
-  })
-
-  it('negotiates an unsupported protocol version down to the supported one', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    const res = await harness.client.initialize({ protocolVersion: 999, clientCapabilities: {} })
-    expect(res.protocolVersion).toBe(PROTOCOL_VERSION)
-  })
-
-  it('a cancel for an unknown/absent session is a silent no-op', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    // No session created yet — cancel must not throw.
-    await expect(harness.client.cancel({ sessionId: 'nope' })).resolves.toBeUndefined()
-  })
-
-  it('authenticate is a no-op (no auth methods advertised)', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(harness.client.authenticate({ methodId: 'whatever' })).resolves.toBeDefined()
-  })
-
-  it('renders the deployment persona into ACP-created agents\' requests', async () => {
-    harness = await makeBridgeHarness({
-      storageDir,
-      script: [textResponse('ok')],
-      persona: 'be terse',
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    // Create + prompt so the system-prompt plugin's persona section reaches
-    // the model request of an agent the BRIDGE created (session/new).
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'hi' }] })
-    expect(harness.adapter.requests[0]?.system).toContain('be terse')
-  })
-})
diff --git a/packages/ui/acp/tests/codec.spec.ts b/packages/ui/acp/tests/codec.spec.ts
deleted file mode 100644
index 9cd2ca33a1..0000000000
--- a/packages/ui/acp/tests/codec.spec.ts
+++ /dev/null
@@ -1,101 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import type { ContentBlock } from '@deepseek-ai/dsh-llm'
-import type { TurnEndReason } from '@deepseek-ai/dsh-session'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import { encodeSessionReferenceUri, formatSessionReferenceMention } from '@deepseek-ai/dsh-session-reference'
-import type { ContentBlock as AcpContentBlock } from '@agentclientprotocol/sdk'
-import {
-  acpPromptToReferencedPrompt,
-  acpPromptToText,
-  harnessBlockToAcpContent,
-  promptHasUnsupportedContent,
-  turnEndToStopReason,
-} from '../src/codec.ts'
-
-describe('turnEndToStopReason', () => {
-  // The SDK rejects an unknown stopReason, so this must be total over every
-  // TurnEndReason kind and always produce a legal wire value.
-  it('maps every known TurnEndReason kind to a legal StopReason', () => {
-    expect(turnEndToStopReason({ kind: 'completed' })).toBe('end_turn')
-    expect(turnEndToStopReason({ kind: 'max-tokens' })).toBe('max_tokens')
-    expect(turnEndToStopReason({ kind: 'aborted' })).toBe('cancelled')
-    expect(turnEndToStopReason({ kind: 'disposed' })).toBe('cancelled')
-    expect(turnEndToStopReason({ kind: 'rejected', reason: 'blocked by hook' })).toBe('cancelled')
-    expect(turnEndToStopReason({ kind: 'error', step: 1, message: 'boom' })).toBe('end_turn')
-  })
-
-  it('falls back to end_turn for an unknown (merge-extensible) future kind', () => {
-    // A plugin-added TurnEndReason variant the bridge does not yet know about
-    // must still produce a legal wire value, not throw into the SDK.
-    const future = { kind: 'refusal' } as unknown as TurnEndReason
-    expect(turnEndToStopReason(future)).toBe('end_turn')
-  })
-})
-
-describe('harnessBlockToAcpContent', () => {
-  it('maps a text block to ACP text content', () => {
-    expect(harnessBlockToAcpContent({ type: 'text', text: 'hi' })).toEqual({ type: 'text', text: 'hi' })
-  })
-
-  it('returns undefined for non-text blocks (reasoning / plugin-added)', () => {
-    expect(harnessBlockToAcpContent({ type: 'reasoning', text: 'think' })).toBeUndefined()
-    expect(harnessBlockToAcpContent({ type: 'chart', data: 'x' } as unknown as ContentBlock)).toBeUndefined()
-  })
-})
-
-describe('acpPromptToText', () => {
-  it('concatenates text blocks and renders resource links explicitly', () => {
-    const prompt: AcpContentBlock[] = [
-      { type: 'text', text: 'hello ' },
-      { type: 'resource_link', uri: 'file:///x', name: 'x' },
-      { type: 'text', text: 'world' },
-    ]
-    expect(acpPromptToText(prompt)).toBe('hello \n[resource_link name="x" uri="file:///x"]\nworld')
-  })
-
-  it('returns empty string for a prompt with no text blocks', () => {
-    expect(acpPromptToText([{ type: 'image', mimeType: 'image/png', data: 'AA==' }])).toBe('')
-  })
-})
-
-describe('acpPromptToReferencedPrompt', () => {
-  it('extracts resource links and inline mentions while preserving ordinary links', () => {
-    const sessionId = SessionId('source/会话')
-    const prompt: AcpContentBlock[] = [
-      { type: 'text', text: `compare ${formatSessionReferenceMention({ sessionId, label: 'inline' })} with ` },
-      { type: 'resource_link', uri: encodeSessionReferenceUri(sessionId), name: 'linked' },
-      { type: 'resource_link', uri: 'file:///x', name: 'x' },
-    ]
-    expect(acpPromptToReferencedPrompt(prompt)).toEqual({
-      text: 'compare @inline with @linked\n[resource_link name="x" uri="file:///x"]\n',
-      references: [{ sessionId, label: 'inline' }, { sessionId, label: 'linked' }],
-    })
-  })
-
-  it('rejects malformed session resource links', () => {
-    expect(() => acpPromptToReferencedPrompt([
-      { type: 'resource_link', uri: 'dsh-session:%%%', name: 'bad' },
-    ])).toThrow(/invalid session reference URI/)
-  })
-
-  it('uses the decoded id for an empty resource name and ignores unsupported direct inputs', () => {
-    const sessionId = SessionId('source')
-    expect(acpPromptToReferencedPrompt([
-      { type: 'resource_link', uri: encodeSessionReferenceUri(sessionId), name: '' },
-      { type: 'image', mimeType: 'image/png', data: 'AA==' },
-    ])).toEqual({ text: '@source', references: [{ sessionId, label: 'source' }] })
-  })
-})
-
-describe('promptHasUnsupportedContent', () => {
-  it('detects image, audio, and embedded resource blocks', () => {
-    expect(promptHasUnsupportedContent([{ type: 'image', mimeType: 'image/png', data: 'AA==' }])).toBe(true)
-    expect(promptHasUnsupportedContent([{ type: 'audio', mimeType: 'audio/wav', data: 'AA==' }])).toBe(true)
-    expect(promptHasUnsupportedContent([{ type: 'resource', resource: { uri: 'file:///x', text: 'x' } }])).toBe(true)
-  })
-
-  it('passes baseline text and resource_link prompt blocks', () => {
-    expect(promptHasUnsupportedContent([{ type: 'text', text: 'hi' }])).toBe(false)
-    expect(promptHasUnsupportedContent([{ type: 'resource_link', uri: 'file:///x', name: 'x' }])).toBe(false)
-  })
-})
diff --git a/packages/ui/acp/tests/commands.spec.ts b/packages/ui/acp/tests/commands.spec.ts
deleted file mode 100644
index 45926e2b57..0000000000
--- a/packages/ui/acp/tests/commands.spec.ts
+++ /dev/null
@@ -1,299 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import { encodeSessionReferenceUri } from '@deepseek-ai/dsh-session-reference'
-import { makeBridgeHarness, textResponse, type BridgeHarness } from './harness.ts'
-
-function commandUpdates(harness: BridgeHarness, sessionId: string) {
-  return harness.sessionUpdates.filter(update => update.sessionId === sessionId
-    && update.update.sessionUpdate === 'available_commands_update')
-}
-
-function messageText(harness: BridgeHarness, sessionId: string): string {
-  return harness.sessionUpdates
-    .filter(update => update.sessionId === sessionId && update.update.sessionUpdate === 'agent_message_chunk')
-    .map(({ update }) => update.sessionUpdate === 'agent_message_chunk' && update.content.type === 'text'
-      ? update.content.text : '')
-    .join('')
-}
-
-describe('ACP plugin commands', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-command-')) })
-  afterEach(async () => {
-    if (harness !== undefined) await harness.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('publishes a full command snapshot after session creation and refreshes it dynamically', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    harness.ctx.commands.register({
-      name: 'inspect',
-      description: 'Inspect the session',
-      input: { hint: '<target>' },
-      handler: () => ({ kind: 'success' }),
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    await vi.waitFor(() => {
-      expect(commandUpdates(harness!, sessionId).at(-1)?.update).toEqual({
-        sessionUpdate: 'available_commands_update',
-        availableCommands: [{
-          name: 'inspect',
-          description: 'Inspect the session',
-          input: { hint: '<target>' },
-        }],
-      })
-    })
-
-    const dispose = harness.ctx.commands.register({
-      name: 'alpha',
-      description: 'Alpha command',
-      handler: () => ({ kind: 'success' }),
-    })
-    await vi.waitFor(() => {
-      expect(commandUpdates(harness!, sessionId).at(-1)?.update).toMatchObject({
-        availableCommands: [{ name: 'alpha' }, { name: 'inspect' }],
-      })
-    })
-    dispose()
-    await vi.waitFor(() => {
-      expect(commandUpdates(harness!, sessionId).at(-1)?.update).toMatchObject({
-        availableCommands: [{ name: 'inspect' }],
-      })
-    })
-  })
-
-  it('re-advertises commands after loading a persisted session', async () => {
-    const live = await makeBridgeHarness({ storageDir, script: [textResponse('persisted')] })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'persist this session' }] })
-    await live.dispose()
-
-    harness = await makeBridgeHarness({ storageDir })
-    harness.ctx.commands.register({
-      name: 'loaded', description: 'Loaded command', handler: () => ({ kind: 'success' }),
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await harness.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-
-    expect(commandUpdates(harness, sessionId).at(-1)?.update).toMatchObject({
-      availableCommands: [{ name: 'loaded', description: 'Loaded command' }],
-    })
-  })
-
-  it('coalesces registry changes before a new session command snapshot is announced', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    harness.ctx.commands.register({
-      name: 'raced', description: 'Registered after the response', handler: () => ({ kind: 'success' }),
-    })
-
-    await vi.waitFor(() => {
-      expect(commandUpdates(harness!, sessionId)).toHaveLength(1)
-      expect(commandUpdates(harness!, sessionId)[0]?.update).toMatchObject({
-        availableCommands: [{ name: 'raced' }],
-      })
-    })
-  })
-
-  it('executes a known single-text command directly and never sends it to the model', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    const seen = vi.fn(() => ({ kind: 'success' as const, text: 'DIRECT RESULT' }))
-    harness.ctx.commands.register({ name: 'direct', description: 'Run directly', handler: seen })
-    harness.ctx.commands.register({
-      name: 'silent', description: 'Return no text', handler: () => ({ kind: 'success' }),
-    })
-    harness.ctx.commands.register({
-      name: 'empty', description: 'Return empty text', handler: () => ({ kind: 'success', text: '' }),
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    const response = await harness.client.prompt({
-      sessionId,
-      prompt: [{ type: 'text', text: '/direct  raw args ' }],
-    })
-
-    expect(response.stopReason).toBe('end_turn')
-    expect(seen).toHaveBeenCalledWith(expect.objectContaining({ rawInput: '  raw args ' }))
-    expect(messageText(harness, sessionId)).toContain('DIRECT RESULT')
-    const updatesAfterText = harness.sessionUpdates.length
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/silent' }] })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/empty' }] })
-    expect(harness.sessionUpdates).toHaveLength(updatesAfterText)
-    expect(harness.adapter.requests).toHaveLength(0)
-    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events).toHaveLength(0)
-  })
-
-  it('renders expected command errors and rejects unknown slash commands without model fallback', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    harness.ctx.commands.register({
-      name: 'denied',
-      description: 'Deny directly',
-      handler: () => ({ kind: 'error', text: 'not allowed now' }),
-    })
-    harness.ctx.commands.register({
-      name: 'throws',
-      description: 'Throw an ordinary error',
-      handler: () => { throw new Error('handler exploded') },
-    })
-    harness.ctx.commands.register({
-      name: 'hostile',
-      description: 'Throw a hostile value',
-      handler: () => {
-        throw { toString(): string { throw new Error('coercion exploded') } }
-      },
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/denied' }] }))
-      .resolves.toEqual({ stopReason: 'end_turn' })
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/missing input' }] }))
-      .resolves.toEqual({ stopReason: 'end_turn' })
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/throws' }] }))
-      .resolves.toEqual({ stopReason: 'end_turn' })
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/hostile' }] }))
-      .resolves.toEqual({ stopReason: 'end_turn' })
-
-    expect(messageText(harness, sessionId)).toContain('Error: not allowed now')
-    expect(messageText(harness, sessionId)).toContain('Error: unknown command: /missing input')
-    expect(messageText(harness, sessionId)).toContain('Error: command failed: Error: handler exploded')
-    expect(messageText(harness, sessionId)).toContain('Error: command failed: <unrenderable thrown value>')
-    expect(harness.adapter.requests).toHaveLength(0)
-  })
-
-  it('flattens supported command prompt blocks without invoking the model', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    const command = vi.fn(() => ({ kind: 'success' as const, text: 'combined' }))
-    harness.ctx.commands.register({ name: 'direct', description: 'Direct', handler: command })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    await expect(harness.client.prompt({
-      sessionId,
-      prompt: [
-        { type: 'text', text: '/direct' },
-        { type: 'text', text: ' extra' },
-        { type: 'resource_link', name: 'input', uri: 'file:///workspace/input.txt' },
-      ],
-    })).resolves.toEqual({ stopReason: 'end_turn' })
-    expect(command).toHaveBeenCalledWith(expect.objectContaining({
-      rawInput: ' extra\n[resource_link name="input" uri="file:///workspace/input.txt"]\n',
-    }))
-    expect(messageText(harness, sessionId)).toContain('combined')
-    expect(harness.adapter.requests).toHaveLength(0)
-  })
-
-  it('keeps session-reference syntax opaque in direct command arguments', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    const command = vi.fn(() => ({ kind: 'success' as const }))
-    harness.ctx.commands.register({ name: 'direct', description: 'Direct', handler: command })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const sourceUri = encodeSessionReferenceUri(SessionId('source'))
-
-    await expect(harness.client.prompt({
-      sessionId,
-      prompt: [
-        { type: 'text', text: `/direct valid=${sourceUri} malformed=dsh-session:IiJ` },
-        { type: 'resource_link', name: 'source', uri: sourceUri },
-      ],
-    })).resolves.toEqual({ stopReason: 'end_turn' })
-    expect(command).toHaveBeenCalledWith(expect.objectContaining({
-      rawInput: ` valid=${sourceUri} malformed=dsh-session:IiJ\n[resource_link name="source" uri=${JSON.stringify(sourceUri)}]\n`,
-    }))
-    expect(harness.adapter.requests).toHaveLength(0)
-    expect(harness.ctx.agents.get(SessionId(sessionId))?.session.events).toHaveLength(0)
-  })
-
-  it('maps session cancellation to the in-flight command signal and isolates other sessions', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    let started!: () => void
-    const ready = new Promise<void>((resolve) => { started = resolve })
-    harness.ctx.commands.register({
-      name: 'wait',
-      description: 'Wait for cancellation',
-      handler: ({ signal }) => {
-        started()
-        return new Promise((resolve) => {
-          signal.addEventListener('abort', () => { resolve({ kind: 'error', text: 'late abort result' }) }, { once: true })
-        })
-      },
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const b = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    const waiting = harness.client.prompt({ sessionId: a.sessionId, prompt: [{ type: 'text', text: '/wait' }] })
-    await ready
-    await expect(harness.client.prompt({ sessionId: a.sessionId, prompt: [{ type: 'text', text: '/wait' }] }))
-      .rejects.toThrow(/already in flight/)
-    await harness.client.cancel({ sessionId: a.sessionId })
-
-    await expect(waiting).resolves.toEqual({ stopReason: 'cancelled' })
-    await expect(harness.client.prompt({ sessionId: b.sessionId, prompt: [{ type: 'text', text: '/missing' }] }))
-      .resolves.toEqual({ stopReason: 'end_turn' })
-    expect(messageText(harness, a.sessionId)).not.toContain('late abort result')
-  })
-
-  it('aborts an in-flight command when the ACP bridge is disposed', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    let started!: () => void
-    const ready = new Promise<void>((resolve) => { started = resolve })
-    let commandSignal: AbortSignal | undefined
-    harness.ctx.commands.register({
-      name: 'wait-dispose',
-      description: 'Wait for bridge disposal',
-      handler: ({ signal }) => {
-        commandSignal = signal
-        started()
-        return new Promise<never>(() => {})
-      },
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    const waiting = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: '/wait-dispose' }] })
-    await ready
-    await harness.acpFiber.dispose()
-
-    expect(commandSignal?.aborted).toBe(true)
-    await expect(waiting).resolves.toEqual({ stopReason: 'cancelled' })
-  })
-
-  it('resolves scoped command catalogs and execution independently per session', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const b = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agentA = harness.ctx.agents.get(SessionId(a.sessionId))
-    if (agentA === undefined) throw new Error('session A has no agent')
-    await agentA.ctx.inject(['commands'], (commandCtx) => {
-      commandCtx.commands.register({
-        name: 'private', description: 'Only session A',
-        handler: () => ({ kind: 'success', text: 'A ONLY' }),
-      })
-    })
-
-    await vi.waitFor(() => {
-      expect(commandUpdates(harness!, a.sessionId).at(-1)?.update).toMatchObject({ availableCommands: [{ name: 'private' }] })
-    })
-    expect(commandUpdates(harness, b.sessionId).at(-1)?.update).toMatchObject({ availableCommands: [] })
-    await harness.client.prompt({ sessionId: a.sessionId, prompt: [{ type: 'text', text: '/private' }] })
-    await harness.client.prompt({ sessionId: b.sessionId, prompt: [{ type: 'text', text: '/private' }] })
-    expect(messageText(harness, a.sessionId)).toContain('A ONLY')
-    expect(messageText(harness, b.sessionId)).toContain('unknown command')
-  })
-})
diff --git a/packages/ui/acp/tests/config-options.spec.ts b/packages/ui/acp/tests/config-options.spec.ts
deleted file mode 100644
index c6d385185c..0000000000
--- a/packages/ui/acp/tests/config-options.spec.ts
+++ /dev/null
@@ -1,420 +0,0 @@
-/**
- * Exercises the bridge's per-session Permissions option: validation, idle
- * turn anchoring, isolation, and persistence through `session/load`.
- */
-
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import InvariantService from '@deepseek-ai/dsh-invariants'
-import * as SessionInvariant from '@deepseek-ai/dsh-session/invariant'
-import * as AgentInvariant from '@deepseek-ai/dsh-agent/invariant'
-import * as AgentLoopInvariant from '@deepseek-ai/dsh-agent-loop/invariant'
-import ApprovalService from '@deepseek-ai/dsh-user-approval'
-import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
-import type { SandboxMode } from '@deepseek-ai/dsh-sandbox'
-import PermissionService from '@deepseek-ai/dsh-permission'
-import { makeBridgeHarness, textResponse, type BridgeHarness } from './harness.ts'
-
-/**
- * Advertises the real executor through the `sandboxMode` capability without
- * loading a kernel sandbox, which these bridge tests do not exercise.
- */
-class SandboxedLocalExecutor extends LocalBashExecutor {
-  override get sandboxMode(): SandboxMode {
-    return 'workspace-write'
-  }
-}
-
-async function mountInvariants(ctx: BridgeHarness['ctx']): Promise<void> {
-  await ctx.plugin(InvariantService)
-  await ctx.plugin(SessionInvariant)
-  await ctx.plugin(AgentInvariant)
-  await ctx.plugin(AgentLoopInvariant)
-}
-
-function permissionOption(currentValue: string): object {
-  return {
-    id: 'permission',
-    name: 'Permissions',
-    description: 'The session permission preset: each choice bundles a sandbox mode and an approval policy.',
-    category: 'mode',
-    type: 'select',
-    currentValue,
-    options: [
-      { value: 'workspace-write', name: 'workspace-write', description: 'Write inside the workspace and permitted temporary directories; wider retries require approval.' },
-      { value: 'danger-full-access', name: 'danger-full-access', description: 'Full file access without approval prompts.' },
-    ],
-  }
-}
-
-function modelValue(provider = 'mock', model = 'mock'): string {
-  return JSON.stringify([provider, model])
-}
-
-function modelOption(currentValue = modelValue()): object {
-  return {
-    id: 'model',
-    name: 'Model',
-    description: 'Sets this session\'s provider and model.',
-    category: 'model',
-    type: 'select',
-    currentValue,
-    options: [{ value: modelValue(), name: 'Mock' }],
-  }
-}
-
-function optionsWithPermission(currentValue: string): object[] {
-  return [modelOption(), permissionOption(currentValue)]
-}
-
-describe('acp bridge — session config options', () => {
-  let storageDir: string
-  let h: BridgeHarness | undefined
-  let loader: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-config-')) })
-  afterEach(async () => {
-    if (h) await h.dispose()
-    if (loader) await loader.dispose()
-    h = loader = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  async function presetStack(options: { script?: NonNullable<Parameters<typeof makeBridgeHarness>[0]>['script'] } = {}): Promise<BridgeHarness> {
-    const harness = await makeBridgeHarness({ storageDir, ...options.script !== undefined ? { script: options.script } : {} })
-    // Make an out-of-turn switch fail in this suite.
-    await mountInvariants(harness.ctx)
-    await harness.ctx.plugin(SandboxedLocalExecutor, { timeoutMs: 10_000 })
-    await harness.ctx.plugin(ApprovalService)
-    await harness.ctx.plugin(PermissionService)
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    return harness
-  }
-
-  it('advertises the model selector without requiring the permission service', async () => {
-    h = await makeBridgeHarness({ storageDir })
-    await h.ctx.plugin(SandboxedLocalExecutor, { timeoutMs: 10_000 })
-    await h.ctx.plugin(ApprovalService)
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const res = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(res.configOptions).toEqual([modelOption()])
-  })
-
-  it('groups models by provider and switches routing plus prompt variables as one session target', async () => {
-    h = await makeBridgeHarness({
-      storageDir,
-      script: [textResponse('ok')],
-      config: { provider: 'alpha', model: 'a1' },
-      persona: 'Route {{provider}} / {{model}}',
-      catalog: {
-        providers: [{ id: 'alpha', name: 'Alpha' }, { id: 'beta', name: 'Beta' }],
-        models: [
-          { provider: 'alpha', id: 'a1', name: 'Alpha One', description: 'Fast' },
-          { provider: 'beta', id: 'b1', name: 'Beta One' },
-        ],
-      },
-    })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const created = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(created.configOptions).toEqual([{
-      id: 'model',
-      name: 'Model',
-      description: 'Sets this session\'s provider and model.',
-      category: 'model',
-      type: 'select',
-      currentValue: modelValue('alpha', 'a1'),
-      options: [
-        { group: 'alpha', name: 'Alpha', options: [{ value: modelValue('alpha', 'a1'), name: 'Alpha One', description: 'Fast' }] },
-        { group: 'beta', name: 'Beta', options: [{ value: modelValue('beta', 'b1'), name: 'Beta One' }] },
-      ],
-    }])
-
-    const switched = await h.client.setSessionConfigOption({
-      sessionId: created.sessionId,
-      configId: 'model',
-      value: modelValue('beta', 'b1'),
-    })
-    expect(switched.configOptions?.[0]).toMatchObject({ currentValue: modelValue('beta', 'b1') })
-    await h.client.prompt({ sessionId: created.sessionId, prompt: [{ type: 'text', text: 'use beta' }] })
-    expect(h.adapter.requests[0]).toMatchObject({
-      provider: 'beta',
-      model: 'b1',
-    })
-    expect(h.adapter.requests[0]?.system).toContain('Route beta / b1')
-    expect(h.ctx.agents.list()[0]?.session.requestHeader()?.config).toMatchObject({ provider: 'beta', model: 'b1' })
-  })
-
-  it('adds the configured private model to an advisory catalog and ignores empty non-current groups', async () => {
-    h = await makeBridgeHarness({
-      storageDir,
-      config: { provider: 'alpha', model: 'private-model' },
-      catalog: {
-        providers: [{ id: 'alpha', name: 'Alpha' }, { id: 'empty', name: 'Empty' }],
-        models: [{ provider: 'alpha', id: 'public-model', name: 'Public Model' }],
-      },
-    })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const res = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(res.configOptions?.[0]).toMatchObject({
-      currentValue: modelValue('alpha', 'private-model'),
-      options: [
-        { value: modelValue('alpha', 'public-model'), name: 'Public Model' },
-        { value: modelValue('alpha', 'private-model'), name: 'private-model' },
-      ],
-    })
-  })
-
-  it('omits model selection without a complete or registered current target', async () => {
-    h = await makeBridgeHarness({ storageDir, config: { model: undefined } })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const missing = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(missing.configOptions).toBeUndefined()
-    await h.dispose()
-
-    h = await makeBridgeHarness({ storageDir, config: { provider: 'unregistered', model: 'm' } })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const unknown = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(unknown.configOptions).toBeUndefined()
-  })
-
-  it('leaves model-less agents available to another agent/request supplier', async () => {
-    h = await makeBridgeHarness({ storageDir, config: { model: undefined }, script: [textResponse('ok')] })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = h.ctx.agents.list()[0]
-    if (agent === undefined) throw new Error('expected an agent')
-    agent.ctx.on('agent/request', async (_agent, _turn, _step, callConfig, _signal, _next) => ({
-      ...callConfig,
-      provider: 'mock',
-      model: 'mock',
-    }))
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'supplied elsewhere' }] })
-    expect(h.adapter.requests[0]).toMatchObject({ provider: 'mock', model: 'mock' })
-  })
-
-  it('advertises the Permissions select with the default preset current', async () => {
-    h = await presetStack()
-    const res = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(res.configOptions).toEqual(optionsWithPermission('workspace-write'))
-  })
-
-  it('an idle switch is pending (overlaid, not yet logged), then anchors inside the next prompt\'s turn', async () => {
-    h = await presetStack({ script: [textResponse('ok')] })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    const after = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    expect(after.configOptions).toEqual(optionsWithPermission('danger-full-access'))
-
-    const session = h.ctx.agents.list()[0]?.session
-    expect(session?.events.some(e => e.type === 'permission/preset' || e.type === 'sandbox/mode' || e.type === 'approval/policy')).toBe(false)
-
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'anchor' }] })
-    const events = session?.events ?? []
-    expect(events.filter(e => e.type === 'permission/preset').map(e => e.data)).toEqual([{ preset: 'danger-full-access' }])
-    expect(events.filter(e => e.type === 'sandbox/mode').map(e => e.data)).toEqual([{ mode: 'danger-full-access' }])
-    expect(events.filter(e => e.type === 'approval/policy').map(e => e.data)).toEqual([{ policy: 'never' }])
-    const turnStart = events.findIndex(e => e.type === 'turn/start')
-    const anchored = events.findIndex(e => e.type === 'permission/preset')
-    expect(turnStart).toBeGreaterThanOrEqual(0)
-    expect(anchored).toBeGreaterThan(turnStart)
-  })
-
-  it('an idle flip-flop anchors as one switch (last write wins)', async () => {
-    h = await presetStack({ script: [textResponse('ok')] })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    const again = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    expect(again.configOptions).toEqual(optionsWithPermission('danger-full-access'))
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'anchor' }] })
-    const events = h.ctx.agents.list()[0]?.session.events ?? []
-    expect(events.filter(e => e.type === 'permission/preset')).toHaveLength(1)
-    // A closed turn does not make a later idle switch appendable.
-    await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'workspace-write' })
-    expect(h.ctx.agents.list()[0]?.session.events.filter(e => e.type === 'permission/preset')).toHaveLength(1)
-  })
-
-  it('a net-zero idle flip-flop anchors nothing (switches are recorded, select clicks are not)', async () => {
-    h = await presetStack({ script: [textResponse('ok')] })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    const back = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'workspace-write' })
-    expect(back.configOptions).toEqual(optionsWithPermission('workspace-write'))
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'anchor' }] })
-    const events = h.ctx.agents.list()[0]?.session.events ?? []
-    expect(events.some(e => e.type === 'permission/preset' || e.type === 'sandbox/mode' || e.type === 'approval/policy')).toBe(false)
-  })
-
-  it('a no-op switch (the value already shown) records nothing and keeps a live pending', async () => {
-    h = await presetStack({ script: [textResponse('ok')] })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const echo = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'workspace-write' })
-    expect(echo.configOptions).toEqual(optionsWithPermission('workspace-write'))
-    await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    const repeat = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    expect(repeat.configOptions).toEqual(optionsWithPermission('danger-full-access'))
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'anchor' }] })
-    const events = h.ctx.agents.list()[0]?.session.events ?? []
-    expect(events.filter(e => e.type === 'permission/preset').map(e => e.data)).toEqual([{ preset: 'danger-full-access' }])
-  })
-
-  it('a mid-turn switch anchors immediately (the open turn encloses it)', async () => {
-    h = await presetStack({ script: ['hang'] })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const hung = h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    // Give the loop a tick to open the turn (the turns.spec hang idiom).
-    await new Promise(resolve => setTimeout(resolve, 30))
-    await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    const events = h.ctx.agents.list()[0]?.session.events ?? []
-    const turnStart = events.findIndex(e => e.type === 'turn/start')
-    const anchored = events.findIndex(e => e.type === 'permission/preset')
-    expect(turnStart).toBeGreaterThanOrEqual(0)
-    expect(anchored).toBeGreaterThan(turnStart)
-    expect(events.some(e => e.type === 'sandbox/mode')).toBe(true)
-    expect(events.some(e => e.type === 'approval/policy')).toBe(true)
-    await h.client.cancel({ sessionId })
-    await hung
-  })
-
-  it('rejects unknown ids, unadvertised ids, boolean values, and out-of-vocabulary values', async () => {
-    h = await makeBridgeHarness({ storageDir })
-    await h.ctx.plugin(ApprovalService)
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-
-    await expect(h.client.setSessionConfigOption({ sessionId, configId: 'reasoning-effort', value: 'max' }))
-      .rejects.toThrow(/unknown config option/)
-    // This composition never advertised `permission`.
-    await expect(h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' }))
-      .rejects.toThrow(/unknown permission value/)
-    await expect(h.client.setSessionConfigOption({ sessionId, configId: 'model', value: modelValue('mock', 'missing') }))
-      .rejects.toThrow(/unknown model value/)
-    await expect(h.client.setSessionConfigOption({ sessionId, configId: 'permission', type: 'boolean', value: true }))
-      .rejects.toThrow(/select; boolean values are not accepted/)
-  })
-
-  it('rejects an out-of-vocabulary preset on an advertising composition', async () => {
-    h = await presetStack()
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'plan' }))
-      .rejects.toThrow(/unknown permission value/)
-  })
-
-  it('a switch in one session never leaks into a concurrent one (state and pending both per-session)', async () => {
-    h = await presetStack()
-    const a = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const b = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await h.client.setSessionConfigOption({ sessionId: a.sessionId, configId: 'permission', value: 'danger-full-access' })
-    const bAfter = await h.client.setSessionConfigOption({ sessionId: b.sessionId, configId: 'permission', value: 'workspace-write' })
-    expect(bAfter.configOptions).toEqual(optionsWithPermission('workspace-write'))
-    const aAfter = await h.client.setSessionConfigOption({ sessionId: a.sessionId, configId: 'permission', value: 'danger-full-access' })
-    expect(aAfter.configOptions).toEqual(optionsWithPermission('danger-full-access'))
-  })
-
-  it('keeps model targets isolated across concurrent sessions', async () => {
-    h = await makeBridgeHarness({
-      storageDir,
-      script: [textResponse('a'), textResponse('b')],
-      config: { provider: 'mock', model: 'one' },
-      catalog: {
-        providers: [{ id: 'mock', name: 'Mock' }],
-        models: [
-          { provider: 'mock', id: 'one', name: 'One' },
-          { provider: 'mock', id: 'two', name: 'Two' },
-        ],
-      },
-    })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const b = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await h.client.setSessionConfigOption({ sessionId: a.sessionId, configId: 'model', value: modelValue('mock', 'two') })
-    await h.client.prompt({ sessionId: a.sessionId, prompt: [{ type: 'text', text: 'a' }] })
-    await h.client.prompt({ sessionId: b.sessionId, prompt: [{ type: 'text', text: 'b' }] })
-    expect(h.adapter.requests.map(request => request.model)).toEqual(['two', 'one'])
-  })
-
-  it('a knob drifted outside the table derives a visible-but-untargetable custom current', async () => {
-    h = await presetStack()
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    // Simulate a plugin calling the public knob setter inside a valid turn.
-    const agent = h.ctx.agents.list()[0]
-    if (agent === undefined) throw new Error('expected an agent')
-    agent.session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
-    agent.session.append('sandbox/mode', { mode: 'read-only' })
-    agent.session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
-    const echo = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'custom' })
-    const option = echo.configOptions?.find(entry => entry.id === 'permission')
-    expect(option).toMatchObject({ currentValue: 'custom' })
-    if (option === undefined || !('options' in option)) throw new Error('expected a select option')
-    expect(option.options.map(o => 'value' in o ? o.value : o)).toEqual(['workspace-write', 'danger-full-access', 'custom'])
-    const away = await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    const afterOption = away.configOptions?.find(entry => entry.id === 'permission')
-    expect(afterOption).toMatchObject({ currentValue: 'danger-full-access' })
-    if (afterOption === undefined || !('options' in afterOption)) throw new Error('expected a select option')
-    expect(afterOption.options.map(o => 'value' in o ? o.value : o)).toEqual(['workspace-write', 'danger-full-access'])
-    await expect(h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'custom' }))
-      .rejects.toThrow(/unknown permission value/)
-  })
-
-  it('session/load reports a resumed session\'s preset from its own log', async () => {
-    h = await presetStack({ script: [textResponse('ok')] })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await h.client.setSessionConfigOption({ sessionId, configId: 'permission', value: 'danger-full-access' })
-    // One turn checkpoints the log (the switch events flush with it).
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'persist me' }] })
-    await h.dispose()
-    h = undefined
-
-    loader = await presetStack()
-    const res = await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-    expect(res.configOptions).toEqual(optionsWithPermission('danger-full-access'))
-  })
-
-  it('session/load restores the last requested provider/model from the request header', async () => {
-    const catalog = {
-      providers: [{ id: 'mock', name: 'Mock' }],
-      models: [
-        { provider: 'mock', id: 'one', name: 'One' },
-        { provider: 'mock', id: 'two', name: 'Two' },
-      ],
-    }
-    h = await makeBridgeHarness({
-      storageDir,
-      script: [textResponse('ok')],
-      config: { provider: 'mock', model: 'one' },
-      catalog,
-    })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await h.client.setSessionConfigOption({ sessionId, configId: 'model', value: modelValue('mock', 'two') })
-    await h.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'persist target' }] })
-    await h.dispose()
-    h = undefined
-
-    loader = await makeBridgeHarness({ storageDir, config: { provider: 'mock', model: 'one' }, catalog })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const loaded = await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-    expect(loaded.configOptions?.find(option => option.id === 'model')).toMatchObject({
-      currentValue: modelValue('mock', 'two'),
-    })
-  })
-
-  it('session/load omits config options when the persisted session has no target or permission service', async () => {
-    h = await makeBridgeHarness({ storageDir, config: { model: undefined } })
-    await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = h.ctx.agents.list()[0]
-    if (agent === undefined) throw new Error('expected an agent')
-    agent.inject([{ type: 'text', text: 'checkpoint' }], { source: { kind: 'plugin', plugin: 'test' } })
-    await agent.whenIdle()
-    await h.dispose()
-    h = undefined
-
-    loader = await makeBridgeHarness({ storageDir, config: { model: undefined } })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const loaded = await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-    expect(loaded.configOptions).toBeUndefined()
-  })
-})
diff --git a/packages/ui/acp/tests/dispose.spec.ts b/packages/ui/acp/tests/dispose.spec.ts
deleted file mode 100644
index 8baf076d58..0000000000
--- a/packages/ui/acp/tests/dispose.spec.ts
+++ /dev/null
@@ -1,320 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import { makeBridgeHarness, textResponse } from './harness.ts'
-
-describe('acp bridge — disposal & HMR safety', () => {
-  let storageDir: string
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-dispose-')) })
-  afterEach(async () => { await rm(storageDir, { recursive: true, force: true }) })
-
-  it('disposal reaches quiescence: a running turn is aborted and awaited before dispose returns', async () => {
-    const harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-
-    // Start a prompt that hangs in the model stream.
-    const promptDone = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    await new Promise(r => setTimeout(r, 30))
-    expect(agent.status).toBe('running')
-
-    // Dispose the whole context. The bridge's teardown must abort the agent and
-    // AWAIT whenIdle() — so right after dispose resolves, the agent is settled
-    // (not still running). Proves disposal waited, not just requested.
-    await harness.ctx.fiber.dispose()
-    expect(agent.status).not.toBe('running')
-
-    // The in-flight prompt settled (cancelled) rather than hanging forever.
-    const res = await promptDone
-    expect(res.stopReason).toBe('cancelled')
-  })
-
-  it('after an ACP-only HMR dispose, a late session/new creates no orphan agent (closed guard)', async () => {
-    // Dispose JUST the bridge's fiber (an HMR reload) while agents/agent-loop
-    // stay up and the transport is still live. A late session/new must hit the
-    // `closed` guard and reject — NOT create an agent the disposed bridge can no
-    // longer stream or settle. Verify the world: no agent appeared.
-    const harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const before = harness.ctx.agents.list().length
-    await harness.acpFiber.dispose() // tear down ONLY the bridge
-    await expect(harness.client.newSession({ cwd: process.cwd(), mcpServers: [] }))
-      .rejects.toThrow(/disposed/)
-    expect(harness.ctx.agents.list().length).toBe(before)
-    await harness.dispose()
-  })
-
-  it('an agent created through the bridge is unregistered when ONLY the bridge fiber is disposed', async () => {
-    // The factory (`ctx.agents.create`) is reached through the bridge's
-    // traceable service proxy, so `AgentLoop.start`'s `this.ctx.effect(...)`
-    // registration binds to the CALLER context — the bridge fiber — not the
-    // AgentLoop fiber. Disposing JUST the bridge fiber (an ACP-only HMR reload)
-    // must therefore reclaim the agent's registry entry, even though agents/
-    // agent-loop stay up. This pins the fiber-ownership the bridge's teardown
-    // doc comment relies on; if a refactor rebinds the registration to the
-    // AgentLoop fiber, the agent would survive bridge dispose and this fails.
-    const harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeDefined()
-
-    await harness.acpFiber.dispose() // tear down ONLY the bridge
-    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
-    await harness.dispose()
-  })
-
-  it('no agent is created by a session/new after the bridge has closed (closed guard)', async () => {
-    // After teardown (here a client disconnect sets `closed`), a late
-    // `session/new` must NOT create an orphan agent the bridge can no longer
-    // drive/settle. The transport is gone so the RPC rejects; assert the world:
-    // no new agent appeared in the registry.
-    const harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const before = harness.ctx.agents.list().length
-    await harness.closeClientTransport() // teardown → closed = true
-    await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] }).catch(() => {})
-    await new Promise(r => setTimeout(r, 10))
-    expect(harness.ctx.agents.list().length).toBe(before)
-    await harness.dispose()
-  })
-
-  it('a client disconnect mid-prompt disposes the session (no registered agent left)', async () => {
-    // The ACP transport closes (editor quits) while a turn runs. The bridge must
-    // settle the in-flight prompt cancelled and DISPOSE the agent (the session's
-    // per-agent AgentHandle teardown) rather than leaving an orphaned running —
-    // or even idled-but-still-registered — agent whose updates are swallowed.
-    const harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    // Start a prompt that hangs in the model stream. The prompt RPC will never
-    // return (its transport is severed), so do not await it.
-    void harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }).catch(() => {})
-    await new Promise(r => setTimeout(r, 30))
-    expect(agent.status).toBe('running')
-
-    // Sever the transport — the bridge's conn.closed teardown runs and drives the
-    // agent's AgentHandle dispose to quiescence on its OWN (before any dispose()).
-    await harness.closeClientTransport()
-    await agent.whenIdle()
-    // The agent's loop has stopped: status `disposed`.
-    expect(agent.status).toBe('disposed')
-
-    // Await the bridge teardown to completion WITHOUT tearing down the root
-    // agents/sessions services (so we can still query them). acpFiber.dispose()
-    // invokes the SAME memoized quiesce() the disconnect started and awaits its
-    // promise — which resolves only after every rec.dispose() (loop exit +
-    // session removal) has finished, closing the whenIdle()/owned.dispose()
-    // microtask race. The AgentHandle dispose has run: the agent is unregistered
-    // and its session removed from the store, not merely idled (the old
-    // behavior). The services live on the root ctx, so they survive this.
-    await harness.acpFiber.dispose()
-    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
-    expect(harness.ctx.sessions.get(SessionId(sessionId))).toBeUndefined()
-    await harness.dispose()
-  })
-
-  it('a client disconnect racing fiber dispose both reach quiescence (shared teardown)', async () => {
-    // conn.closed teardown and ctx.fiber.dispose() can fire near-simultaneously.
-    // They must share one teardown promise: dispose() must NOT return before the
-    // disconnect teardown's whenIdle() has settled (a `record === undefined`-only
-    // guard would let the second caller return early mid-teardown).
-    const harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    void harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }).catch(() => {})
-    await new Promise(r => setTimeout(r, 30))
-    expect(agent.status).toBe('running')
-
-    // Fire both teardown paths without awaiting the first, then await both.
-    const close = harness.closeClientTransport()
-    const dispose = harness.ctx.fiber.dispose()
-    await Promise.all([close, dispose])
-    // After BOTH settle, the agent has fully drained (not still running).
-    expect(agent.status).not.toBe('running')
-  })
-
-  it('after dispose, session/update listeners are gone (no further updates emitted)', async () => {
-    const harness = await makeBridgeHarness({ storageDir, script: [] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const session = harness.ctx.agents.get(SessionId(sessionId))!.session
-
-    await harness.ctx.fiber.dispose()
-    const before = harness.updates.length
-    // Append an event directly to the (now-detached) session: the bridge's
-    // session/event listener should have been disposed, so no update fires.
-    session.append('turn/start', { turn: 99, trigger: { kind: 'message', source: { kind: 'user' } } })
-    await new Promise(r => setTimeout(r, 10))
-    expect(harness.updates.length).toBe(before)
-  })
-
-  it('the final turn closing events are persisted across an AgentHandle dispose (durability)', async () => {
-    // The teardown-ORDER guarantee: a per-agent dispose must stop the loop,
-    // AWAIT its exit (so the loop's final `turn/end` + `session/flush` fire
-    // through the still-attached store observer → `session/event`), and only
-    // THEN remove its publication hooks and session entry. If the order were inverted
-    // (detach first), the closing events would never reach persistence. Drive a
-    // CLEAN turn to completion, dispose JUST the bridge, then re-load the
-    // persisted log from disk and assert the closing turn/end is on disk — the
-    // world, not the agent's self-report.
-    const harness = await makeBridgeHarness({ storageDir, script: [textResponse('done')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    const liveEvents = harness.ctx.agents.get(SessionId(sessionId))!.session.events.length
-    expect(liveEvents).toBeGreaterThan(0)
-
-    // Tear down JUST the bridge (the AgentHandle dispose runs to quiescence).
-    await harness.acpFiber.dispose()
-    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
-
-    // Re-load the session from disk: every live event (incl. the closing
-    // turn/end) was flushed before the session was detached.
-    const reloaded = await harness.ctx.sessionPersistence.load(SessionId(sessionId))
-    expect(reloaded.events.length).toBe(liveEvents)
-    const last = reloaded.events.at(-1)!
-    expect(last.type).toBe('turn/end')
-    await harness.dispose()
-  })
-
-  it('a turn aborted BY the dispose still flushes its closing turn/end to disk (durability, mid-turn)', async () => {
-    // The teardown-order contract only earns its keep when the closing events are
-    // produced BY the dispose itself. Here the model stream HANGS, so the turn is
-    // still open when teardown runs: the composite agent effect stops the loop,
-    // the loop unwinds and appends `turn/end {disposed}` + runs its final
-    // `session/flush` — all while the store-owned publication hooks are still attached (the session
-    // detach is the LAST disposer in the same effect's LIFO chain) — and only
-    // THEN is the session detached. If the order were inverted (or the session
-    // were a racing SIBLING effect), the abort-produced `turn/end` would never
-    // reach disk and a re-load would instead show crash-recovery's synthetic
-    // `interrupted` closer. Re-load from disk and assert the REAL `disposed`
-    // reason landed — proving the loop's own closing event was captured, not a
-    // recovered substitute.
-    const harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    void harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }).catch(() => {})
-    await new Promise(r => setTimeout(r, 30))
-    expect(agent.status).toBe('running')
-    // The turn is OPEN in the log (turn/start appended, no turn/end yet).
-    const openTurnEnds = agent.session.events.filter(e => e.type === 'turn/end').length
-
-    // Dispose JUST the bridge: a fiber unload that must STILL honor the ordered
-    // teardown (the composite effect runs its disposer chain as a unit).
-    await harness.acpFiber.dispose()
-    expect(harness.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
-
-    // The loop's own `turn/end {disposed}` is on disk (re-load: the world, not
-    // self-report) — NOT a crash-recovery `interrupted` substitute.
-    const reloaded = await harness.ctx.sessionPersistence.load(SessionId(sessionId))
-    const persistedTurnEnds = reloaded.events.filter(e => e.type === 'turn/end')
-    expect(persistedTurnEnds.length).toBe(openTurnEnds + 1)
-    expect(persistedTurnEnds.at(-1)!.data.reason).toMatchObject({ kind: 'disposed' })
-    await harness.dispose()
-  })
-
-  it('per-session AgentHandle dispose leaves sibling agents untouched', async () => {
-    // The factory returns a per-agent AgentHandle whose dispose() tears down
-    // EXACTLY that agent + its session — the registry's per-handle isolation
-    // contract. Create two agents
-    // directly through the registry factory (the same path the ACP bridge uses),
-    // dispose one handle, and assert the other survives, registered and
-    // queryable, with its session still in the store.
-    const harness = await makeBridgeHarness({ storageDir, script: [] })
-    const handleA = await harness.ctx.agents.create({
-      sessionId: SessionId('sib-a'), agentOptions: { provider: 'mock', model: 'mock' },
-    })
-    const handleB = await harness.ctx.agents.create({
-      sessionId: SessionId('sib-b'), agentOptions: { provider: 'mock', model: 'mock' },
-    })
-    expect(harness.ctx.agents.get(SessionId('sib-a'))).toBe(handleA.agent)
-    expect(harness.ctx.agents.get(SessionId('sib-b'))).toBe(handleB.agent)
-
-    await handleA.dispose()
-    // A is gone — unregistered AND its session removed from the store.
-    expect(harness.ctx.agents.get(SessionId('sib-a'))).toBeUndefined()
-    expect(harness.ctx.sessions.get(SessionId('sib-a'))).toBeUndefined()
-    expect(handleA.agent.status).toBe('disposed')
-    // B is wholly unaffected.
-    expect(harness.ctx.agents.get(SessionId('sib-b'))).toBe(handleB.agent)
-    expect(harness.ctx.sessions.get(SessionId('sib-b'))).toBeDefined()
-    expect(handleB.agent.status).not.toBe('disposed')
-    await harness.dispose()
-  })
-
-  it('a throwing agent/disposed listener does not prevent session removal (composite-effect containment)', async () => {
-    // The AgentHandle teardown folds session-detach, register, and loop-stop
-    // into ONE composite effect whose disposers run as a `.then()` chain. The
-    // register disposer emits `agent/disposed`; if a listener throws and the
-    // emit is UNCONTAINED, the rejected chain skips the LATER session-detach
-    // disposer — stranding the session in the store with its publication hooks attached (a
-    // leak AND a durability hole, since the new design relies on detach
-    // running). The emit must be contained. Register a throwing listener, drive
-    // a clean turn, dispose, and assert the session was STILL removed.
-    const harness = await makeBridgeHarness({ storageDir, script: [textResponse('ok')] })
-    harness.ctx.on('agent/disposed', () => { throw new Error('boom disposed listener') })
-    const handle = await harness.ctx.agents.create({
-      sessionId: SessionId('guard-a'), agentOptions: { provider: 'mock', model: 'mock' },
-    })
-    handle.agent.send([{ type: 'text', text: 'go' }])
-    await handle.agent.whenIdle()
-    expect(harness.ctx.sessions.get(SessionId('guard-a'))).toBeDefined()
-
-    // Dispose: the throwing listener must NOT break the chain before detach.
-    await handle.dispose()
-    expect(harness.ctx.agents.get(SessionId('guard-a'))).toBeUndefined()
-    expect(harness.ctx.sessions.get(SessionId('guard-a'))).toBeUndefined() // detach still ran
-    await harness.dispose()
-  })
-
-  it('concurrent AgentHandle dispose() calls all await the SAME teardown (memoized)', async () => {
-    // The handle's dispose() must memoize: the underlying cordis effect disposer
-    // is single-shot, so a second dispose() while the first is mid-teardown would
-    // otherwise resolve IMMEDIATELY (effect epoch already cleared) — before the
-    // first call's await agent.done + final flush finished. Every caller must
-    // observe the same quiescence boundary.
-    const harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    const handle = await harness.ctx.agents.create({
-      sessionId: SessionId('conc-a'), agentOptions: { provider: 'mock', model: 'mock' },
-    })
-    // Drive a turn that hangs in the model stream, so the loop is mid-turn when
-    // disposed — its exit runs a final session/flush we can gate to hold the
-    // teardown observably in-flight.
-    handle.agent.send([{ type: 'text', text: 'go' }])
-    await new Promise(r => setTimeout(r, 30))
-    expect(handle.agent.status).toBe('running')
-    let releaseFlush!: () => void
-    const flushGate = new Promise<void>((resolve) => { releaseFlush = resolve })
-    harness.ctx.on('session/flush', () => flushGate)
-
-    // First dispose enters teardown (aborts the hanging step) and blocks in the
-    // gated final flush.
-    const first = handle.dispose()
-    let firstSettled = false
-    void first.then(() => { firstSettled = true })
-    await new Promise(r => setTimeout(r, 20))
-    expect(firstSettled).toBe(false)
-
-    // Second dispose MUST await the same in-flight teardown, not resolve early.
-    const second = handle.dispose()
-    let secondSettled = false
-    void second.then(() => { secondSettled = true })
-    await new Promise(r => setTimeout(r, 20))
-    expect(secondSettled).toBe(false) // memoized: still pending with the first
-
-    // Release the flush; both resolve together and the session is gone.
-    releaseFlush()
-    await Promise.all([first, second])
-    expect(harness.ctx.agents.get(SessionId('conc-a'))).toBeUndefined()
-    expect(harness.ctx.sessions.get(SessionId('conc-a'))).toBeUndefined()
-    await harness.dispose()
-  })
-})
diff --git a/packages/ui/acp/tests/edges.spec.ts b/packages/ui/acp/tests/edges.spec.ts
deleted file mode 100644
index fdbaf241e6..0000000000
--- a/packages/ui/acp/tests/edges.spec.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import { makeBridgeHarness, textResponse, type BridgeHarness } from './harness.ts'
-
-describe('acp bridge — demux & config edges', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-edge-')) })
-  afterEach(async () => {
-    if (harness) await harness.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('ignores events from an agent the bridge does not own (strict id demux)', async () => {
-    // A second agent created directly on the registry (NOT via the bridge) runs
-    // a turn. Its session events must NOT produce ACP updates and
-    // must not settle anything — the bridge demuxes strictly by its own id.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('foreign')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await vi.waitFor(() => {
-      expect(harness!.updates.some(update => update.sessionUpdate === 'available_commands_update')).toBe(true)
-    })
-    const before = harness.updates.length
-
-    const { agent: foreign } = await harness.ctx.agents.create({ sessionId: SessionId('foreign-session'), agentOptions: { provider: 'mock', model: 'mock' } })
-    foreign.send([{ type: 'text', text: 'hi' }])
-    await foreign.whenIdle()
-    await new Promise(r => setTimeout(r, 10))
-
-    // No update was emitted for the foreign agent's stream.
-    expect(harness.updates.length).toBe(before)
-  })
-
-  it('survives a session/update that the client rejects (best-effort notify)', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('ok')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    // Make the client reject every update — the bridge's notify() must swallow
-    // the rejection and the prompt must still settle normally.
-    harness.onSessionUpdateError = () => { throw new Error('client update rejected') }
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(res.stopReason).toBe('end_turn')
-  })
-
-  it('accepts session/new with additionalDirectories empty', async () => {
-    // Exercises the defined-but-empty additionalDirectories branch (length 0 → allowed).
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [], additionalDirectories: [] })
-    expect(a.sessionId).toBeTruthy()
-  })
-
-  it('rejects non-empty mcpServers until MCP wiring is implemented', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(harness.client.newSession({
-      cwd: process.cwd(),
-      mcpServers: [{ name: 'fs', command: 'npx', args: ['server'], env: [] }],
-    })).rejects.toThrow(/mcpServers/)
-  })
-})
diff --git a/packages/ui/acp/tests/harness.ts b/packages/ui/acp/tests/harness.ts
deleted file mode 100644
index fa7700c5f3..0000000000
--- a/packages/ui/acp/tests/harness.ts
+++ /dev/null
@@ -1,340 +0,0 @@
-/**
- * Shared non-spec fixture that mounts the full in-memory agent/persistence stack and connects the
- * ACP bridge to a real SDK client over memory streams. Tests exercise the same protocol path as an
- * editor without a subprocess or stdio.
- */
-
-import { Context } from 'cordis'
-import { CallId, type GenerateOptions, type LlmModelInfo, type LlmProviderInfo, type StreamChunk } from '@deepseek-ai/dsh-llm'
-import { LlmAdapter } from '@deepseek-ai/dsh-llm'
-import AgentLoop from '@deepseek-ai/dsh-agent-loop'
-import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
-import CommandService from '@deepseek-ai/dsh-commands'
-import SessionPersistenceJsonl from '@deepseek-ai/dsh-session-persistence-jsonl'
-import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
-import LocalFileSystem from '@deepseek-ai/dsh-fs-local'
-import * as FsPolicy from '@deepseek-ai/dsh-fs-policy'
-import * as ToolBash from '@deepseek-ai/dsh-tool-bash'
-import * as ToolFs from '@deepseek-ai/dsh-tool-fs'
-import * as ToolTodo from '@deepseek-ai/dsh-tool-todo'
-import PlanModeService from '@deepseek-ai/dsh-plan-mode'
-import {
-  ClientSideConnection,
-  ndJsonStream,
-  type Agent as AcpAgent,
-  type Client,
-  type CreateElicitationRequest,
-  type CreateElicitationResponse,
-  type RequestPermissionRequest,
-  type RequestPermissionResponse,
-  type SessionNotification,
-  type Stream,
-} from '@agentclientprotocol/sdk'
-import UserInteractionService from '@deepseek-ai/dsh-user-interaction'
-import SessionQueryService from '@deepseek-ai/dsh-session-query'
-import SessionReferenceService from '@deepseek-ai/dsh-session-reference'
-import * as ToolAskUser from '@deepseek-ai/dsh-tool-ask-user'
-import * as AcpPlugin from '../src/index.ts'
-import { type AcpConfig } from '../src/index.ts'
-
-class TestSessionQueryService extends SessionQueryService {
-  override searchSessions(
-    ..._args: Parameters<SessionQueryService['searchSessions']>
-  ): ReturnType<SessionQueryService['searchSessions']> {
-    return Promise.resolve({ items: [] })
-  }
-
-  override searchEvents(
-    ..._args: Parameters<SessionQueryService['searchEvents']>
-  ): ReturnType<SessionQueryService['searchEvents']> {
-    return Promise.resolve({ items: [] })
-  }
-}
-
-/** A scripted mock adapter (mirrors the agent-loop test adapter). */
-class MockAdapter extends LlmAdapter {
-  requests: GenerateOptions[] = []
-  constructor(
-    private script: (StreamChunk[] | 'hang')[],
-    private readonly providers: readonly LlmProviderInfo[],
-    private readonly models: readonly LlmModelInfo[],
-  ) {
-    super()
-  }
-
-  override providerInfo(provider: string): LlmProviderInfo {
-    const info = this.providers.find(entry => entry.id === provider)
-    if (info === undefined) throw new Error(`MockAdapter: unknown provider ${provider}`)
-    return info
-  }
-
-  override listModels(provider: string): Promise<readonly LlmModelInfo[]> {
-    return Promise.resolve(this.models.filter(model => model.provider === provider))
-  }
-
-  async * stream(options: GenerateOptions): AsyncIterable<StreamChunk> {
-    this.requests.push(options)
-    const entry = this.script.shift()
-    if (!entry) throw new Error('MockAdapter: script exhausted')
-    if (entry === 'hang') {
-      yield { type: 'block-start', index: 0, blockType: 'text' }
-      yield { type: 'text-delta', index: 0, text: 'partial' }
-      await new Promise<void>((_resolve, reject) => {
-        if (options.signal?.aborted) { reject(new Error('aborted')); return }
-        options.signal?.addEventListener('abort', () => { reject(new Error('aborted')) }, { once: true })
-      })
-      return
-    }
-    for (const chunk of entry) {
-      if (options.signal?.aborted) throw new Error('aborted')
-      yield chunk
-    }
-  }
-}
-
-/** Scripted text response ending in a clean `stop` finish. */
-export function textResponse(text: string): StreamChunk[] {
-  return [
-    { type: 'block-start', index: 0, blockType: 'text' },
-    ...Array.from(text, (char): StreamChunk => ({ type: 'text-delta', index: 0, text: char })),
-    { type: 'block-end', index: 0, block: { type: 'text', text } },
-    { type: 'usage', usage: { inputTokens: 5, outputTokens: text.length } },
-    { type: 'finish', reason: { kind: 'stop' } },
-  ]
-}
-
-/** Scripted response ending at the output-token ceiling (max-tokens finish). */
-export function maxTokensResponse(text: string): StreamChunk[] {
-  return [
-    { type: 'block-start', index: 0, blockType: 'text' },
-    ...Array.from(text, (char): StreamChunk => ({ type: 'text-delta', index: 0, text: char })),
-    { type: 'block-end', index: 0, block: { type: 'text', text } },
-    { type: 'finish', reason: { kind: 'max-tokens' } },
-  ]
-}
-
-/** Scripted response that fails mid-turn with a finish-error chunk. */
-export function errorResponse(message: string): StreamChunk[] {
-  return [
-    { type: 'block-start', index: 0, blockType: 'text' },
-    { type: 'text-delta', index: 0, text: 'partial' },
-    { type: 'finish', reason: { kind: 'error', failure: { message, code: 'PROVIDER_ERROR' } } },
-  ]
-}
-
-/** Scripted single tool call (no follow-up step scripted by default). */
-export function toolCallResponse(rawCallId: string, name: string, args: object): StreamChunk[] {
-  const argumentsJson = JSON.stringify(args)
-  const id = CallId(rawCallId)
-  return [
-    { type: 'block-start', index: 0, blockType: 'tool-call' },
-    { type: 'tool-call-delta', index: 0, id, name, argumentsDelta: argumentsJson },
-    { type: 'block-end', index: 0, block: { type: 'tool-call', id, name, arguments: argumentsJson } },
-    { type: 'finish', reason: { kind: 'tool-calls' } },
-  ]
-}
-
-/** A captured `session/update` notification (the update payload only). */
-export type CapturedUpdate = SessionNotification['update']
-
-export interface BridgeHarness {
-  ctx: Context
-  client: ClientSideConnection
-  adapter: MockAdapter
-  /** Every `session/update` the bridge pushed, in order (payload only). */
-  updates: CapturedUpdate[]
-  /** Same, but tagged with each update's `sessionId` (for multi-session demux assertions). */
-  sessionUpdates: { sessionId: string; update: CapturedUpdate }[]
-  /** Permission requests the bridge issued (none until the gate lands). */
-  permissionRequests: RequestPermissionRequest[]
-  /** Decide each permission request's outcome (default: cancelled). */
-  onPermission: (req: RequestPermissionRequest) => RequestPermissionResponse
-  /** Elicitation requests the bridge issued for ask_user_question. */
-  elicitationRequests: CreateElicitationRequest[]
-  /** Decide each elicitation response (default: cancel). */
-  onElicitation: (req: CreateElicitationRequest) => CreateElicitationResponse | Promise<CreateElicitationResponse>
-  /** If set, the client's sessionUpdate throws this (tests notify error path). */
-  onSessionUpdateError: (() => void) | undefined
-  /**
-   * Sever the client→agent transport (close the writable the agent reads),
-   * which ends the agent-side stream and resolves the bridge's `conn.closed` —
-   * simulating an editor disconnecting. Returns once the close is requested.
-   */
-  closeClientTransport: () => Promise<void>
-  /**
-   * The child fiber the ACP bridge is mounted in. Disposing it tears down JUST
-   * the bridge (its `ctx.on` listeners + effect) while the rest of the harness
-   * stays up — an ACP-only HMR reload.
-   */
-  acpFiber: Awaited<ReturnType<Context['plugin']>>
-  dispose: () => Promise<void>
-  storageDir: string
-}
-
-/** Test-only overrides preserve explicit undefined to suppress harness defaults. */
-type AcpConfigOverrides = { [K in keyof AcpConfig]?: AcpConfig[K] | undefined }
-
-/**
- * Build the bridge + a connected client over an in-memory transport pair.
- *
- * Two identity `TransformStream`s cross-wired (agent writes → client reads,
- * client writes → agent reads) give a faithful bidirectional JSON-RPC channel.
- * The bridge's `apply` receives the agent-side `Stream` via `config.stream`;
- * the test holds the `ClientSideConnection`.
- *
- * Pass an explicit undefined route field to suppress its mock default.
- */
-export async function makeBridgeHarness(options: {
-  script?: (StreamChunk[] | 'hang')[]
-  config?: AcpConfigOverrides
-  /** Provider-neutral directory exposed to ACP model-selection tests. */
-  catalog?: { providers: LlmProviderInfo[]; models: LlmModelInfo[] }
-  /** Deployment persona for the tree (the system-prompt plugin's config). */
-  persona?: string
-  storageDir: string
-  /**
-   * Plug the REAL `dsh-bash-local` executor + `dsh-tool-bash` tools (instead of
-   * a test's own inline tool). Lets a test drive the actual `bash` tool — its
-   * real `presentCall`/`presentResult` — through the bridge, so tool-call UI
-   * tests verify the SHIPPING tool, not a stand-in (docs/testing.md "prefer the real
-   * implementation over a mock in tests").
-   */
-  withBash?: boolean
-  /** Plug the REAL `ask_user_question` tool and ACP user-interaction provider. */
-  withAskUser?: boolean
-  /**
-   * Plug the REAL `dsh-tool-todo` tool so a test can drive `todo_write` through
-   * the bridge and assert the resulting `plan` sessionUpdate — the shipping
-   * tool + the bridge's own todo/write→plan mapping, not a stand-in.
-   */
-  withTodo?: boolean
-  /** Mount exact session reads and cross-session snapshot preparation before ACP. */
-  withSessionReferences?: boolean
-  /** Plug the REAL `dsh-plan-mode` plugin so a test can drive the session-mode picker. */
-  withModes?: boolean
-  /**
-   * Plug the REAL filesystem stack (`dsh-fs-local` + `dsh-fs-policy` +
-   * `dsh-tool-fs`) so a test can drive `read`/`write`/`edit` through the bridge
-   * and assert their tool-owned presentation (title/kind/`locations`) on the
-   * wire — the shipping tools, not a stand-in. `fsCwd` sets the local backend's
-   * base directory (default: `storageDir`).
-   */
-  withFs?: boolean
-  fsCwd?: string
-} = { storageDir: '' }): Promise<BridgeHarness> {
-  const catalog = options.catalog ?? {
-    providers: [{ id: 'mock', name: 'Mock' }],
-    models: [{ provider: 'mock', id: 'mock', name: 'Mock' }],
-  }
-  const adapter = new MockAdapter(options.script ?? [], catalog.providers, catalog.models)
-
-  const ctx = new Context()
-  await mountAgentLoopTestDependencies(ctx, {
-    systemPrompt: { persona: options.persona ?? '' },
-  })
-  await ctx.plugin(CommandService)
-  await ctx.plugin(AgentLoop, { agents: [] })
-  await ctx.plugin(SessionPersistenceJsonl, { root: options.storageDir })
-  await ctx.plugin(TestSessionQueryService)
-  if (options.withSessionReferences) {
-    await ctx.plugin(SessionReferenceService)
-  }
-  await ctx.plugin(UserInteractionService)
-  if (options.withAskUser) {
-    await ctx.plugin(ToolAskUser)
-  }
-  if (options.withBash) {
-    await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
-    await ctx.plugin(ToolBash)
-  }
-  if (options.withTodo) {
-    await ctx.plugin(ToolTodo)
-  }
-  if (options.withModes) {
-    await ctx.plugin(PlanModeService, { section: 'Test plan mode instructions.' })
-  }
-  if (options.withFs) {
-    await ctx.plugin(LocalFileSystem, { cwd: options.fsCwd ?? options.storageDir })
-    await ctx.plugin(FsPolicy)
-    await ctx.plugin(ToolFs)
-  }
-  ctx.llm.registerAdapter(catalog.providers.map(provider => provider.id), adapter)
-
-  // Two identity byte pipes cross-wired into the two ndJsonStreams: bytes the agent writes flow
-  // to the client's reader and vice versa. (ndJsonStream takes (output, input): the agent
-  // writes to a2c and reads from c2a; the client writes to c2a and reads from a2c.) Holding the c2a
-  // writer lets tests EOF the agent reader and simulate editor disconnect.
-  const a2c = new TransformStream<Uint8Array, Uint8Array>()
-  const c2a = new TransformStream<Uint8Array, Uint8Array>()
-  const c2aWriter = c2a.writable.getWriter()
-  // A WritableStream the client writes into; each chunk is forwarded to the
-  // held c2a writer. `closeClientTransport` closes that writer directly.
-  const clientOutput = new WritableStream<Uint8Array>({
-    write: chunk => c2aWriter.write(chunk),
-  })
-
-  const agentStream: Stream = ndJsonStream(a2c.writable, c2a.readable)
-  const clientStream: Stream = ndJsonStream(clientOutput, a2c.readable)
-
-  const updates: CapturedUpdate[] = []
-  const sessionUpdates: { sessionId: string; update: CapturedUpdate }[] = []
-  const permissionRequests: RequestPermissionRequest[] = []
-  const elicitationRequests: CreateElicitationRequest[] = []
-  const harness: BridgeHarness = {
-    ctx,
-    adapter,
-    updates,
-    sessionUpdates,
-    permissionRequests,
-    onPermission: () => ({ outcome: { outcome: 'cancelled' } }),
-    elicitationRequests,
-    onElicitation: () => ({ action: 'cancel' }),
-    onSessionUpdateError: undefined,
-    client: undefined as unknown as ClientSideConnection,
-    acpFiber: undefined as unknown as BridgeHarness['acpFiber'],
-    // Close the writable the CLIENT writes to (c2a) — its readable, which the agent's
-    // ndJsonStream consumes, then EOFs cleanly, so the bridge's `conn.closed` resolves and it
-    // sees the client disconnect.
-    closeClientTransport: async () => { await c2aWriter.close() },
-    dispose: async () => { await ctx.fiber.dispose() },
-    storageDir: options.storageDir,
-  }
-
-  const makeClient = (_agent: AcpAgent): Client => ({
-    sessionUpdate(params: SessionNotification): Promise<void> {
-      updates.push(params.update)
-      sessionUpdates.push({ sessionId: params.sessionId, update: params.update })
-      // Let a test force the bridge's notify() error path.
-      if (harness.onSessionUpdateError) return Promise.reject(new Error('client update rejected'))
-      return Promise.resolve()
-    },
-    requestPermission(params: RequestPermissionRequest): Promise<RequestPermissionResponse> {
-      permissionRequests.push(params)
-      return Promise.resolve(harness.onPermission(params))
-    },
-    unstable_createElicitation(params: CreateElicitationRequest): Promise<CreateElicitationResponse> {
-      elicitationRequests.push(params)
-      return Promise.resolve(harness.onElicitation(params))
-    },
-  })
-
-  // Default route fields only when the caller omitted them; explicit undefined values must survive.
-  const cfg = { stream: agentStream, ...options.config } as AcpConfig
-  if (!(options.config && 'provider' in options.config)) cfg.provider = 'mock'
-  if (!(options.config && 'model' in options.config)) cfg.model = 'mock'
-  // Mount the bridge the way production does: as a cordis plugin (via `ctx.plugin` with the
-  // real `inject`), not `AcpPlugin.apply(ctx, cfg)` on the ungated root. Later JSON-RPC callbacks run
-  // outside apply's injection scope, matching production and exposing missing-inject failures.
-  harness.acpFiber = await ctx.plugin({
-    name: 'acp-test',
-    // Use the bridge's real exported `inject` so this never drifts from the plugin's actual
-    // dependency list (adding a service to the bridge must not require editing the harness — a
-    // hardcoded list silently broke when `tools` was added). The returned fiber permits ACP-only
-    // disposal while root services remain live for HMR assertions.
-    inject: [...AcpPlugin.inject],
-    apply: (inner: Context) => { AcpPlugin.apply(inner, cfg) },
-  })
-  harness.client = new ClientSideConnection(makeClient, clientStream)
-
-  return harness
-}
diff --git a/packages/ui/acp/tests/load.spec.ts b/packages/ui/acp/tests/load.spec.ts
deleted file mode 100644
index e8617a2b83..0000000000
--- a/packages/ui/acp/tests/load.spec.ts
+++ /dev/null
@@ -1,337 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { SESSION_FORMAT_VERSION, SessionId } from '@deepseek-ai/dsh-session'
-import type {} from '@deepseek-ai/dsh-session-title'
-import { makeBridgeHarness, textResponse, toolCallResponse, type BridgeHarness, type CapturedUpdate } from './harness.ts'
-
-/** Concatenate the text of all agent_message_chunk updates. */
-function messageText(updates: CapturedUpdate[]): string {
-  return updates
-    .filter(u => u.sessionUpdate === 'agent_message_chunk')
-    .map(u => (u.content.type === 'text' ? u.content.text : ''))
-    .join('')
-}
-
-describe('acp bridge — session/load replay', () => {
-  let storageDir: string
-  let live: BridgeHarness | undefined
-  let loader: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-load-')) })
-  afterEach(async () => {
-    if (live) await live.dispose()
-    if (loader) await loader.dispose()
-    live = loader = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('replays a persisted turn from the event log as session/update on load', async () => {
-    // 1. Create a session and run one turn — persistence writes the event log.
-    live = await makeBridgeHarness({ storageDir, script: [textResponse('remembered answer')] })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'remember this' }] })
-    // Dispose to flush + release; the on-disk log persists.
-    await live.dispose()
-    live = undefined
-
-    // 2. A fresh bridge loads the same session id and must replay the turn.
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const res = await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-    expect(res).toBeDefined()
-
-    // The replayed updates reconstruct the assistant text from the event log
-    // (assistant/chunk → agent_message_chunk), NOT from deriveMessages.
-    expect(messageText(loader.updates)).toBe('remembered answer')
-
-    // And the USER side of the turn replays too (user/message →
-    // user_message_chunk), so the editor transcript shows both sides.
-    const userText = loader.updates
-      .filter(u => u.sessionUpdate === 'user_message_chunk')
-      .map(u => (u.content.type === 'text' ? u.content.text : ''))
-      .join('')
-    expect(userText).toBe('remember this')
-  })
-
-  it('streams and replays the same persisted session_info_update for a title event', async () => {
-    live = await makeBridgeHarness({ storageDir, script: [] })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    const session = live.ctx.agents.get(SessionId(sessionId))!.session
-    const event = await live.ctx.sessions.appendOutOfBand(session, 'session/title', {
-      title: 'Durable ACP title',
-      messageSeqs: [1],
-      source: { kind: 'fallback' },
-    }, { kind: 'session-title' })
-    const expected = {
-      sessionUpdate: 'session_info_update' as const,
-      title: 'Durable ACP title',
-      updatedAt: new Date(event.time).toISOString(),
-    }
-    expect(live.updates).toContainEqual(expected)
-    await live.dispose()
-    live = undefined
-
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-    expect(loader.updates).toContainEqual(expected)
-  })
-
-  it('replays a persisted tool call with the TOOL-OWNED presentation (title/rawInput/console output)', async () => {
-    // Persist a real bash call, then replay it through a fresh bridge. A throwaway presenter pairs
-    // call and result in log order so replay uses the shipping tool's same cards as live streaming.
-    live = await makeBridgeHarness({
-      storageDir,
-      withBash: true,
-      script: [toolCallResponse('c1', 'bash', { command: 'echo hello', description: 'Print a greeting' }), textResponse('done')],
-    })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'greet' }] })
-    await live.dispose()
-    live = undefined
-
-    // A fresh bridge — also with the real bash tool, since the presentation is
-    // resolved from the live registry at replay time — loads the session.
-    loader = await makeBridgeHarness({ storageDir, withBash: true, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-
-    const call = loader.updates.find(u => u.sessionUpdate === 'tool_call')
-    expect(call).toMatchObject({ toolCallId: 'c1', title: 'echo hello', kind: 'execute', rawInput: 'echo hello' })
-    if (call?.sessionUpdate !== 'tool_call') throw new Error('expected a tool_call')
-    // Capability OFF on this loader: the description renders as a content block, no terminal block.
-    expect(call.content).toEqual([{ type: 'content', content: { type: 'text', text: 'Print a greeting' } }])
-    const update = loader.updates.find(u => u.sessionUpdate === 'tool_call_update')
-    expect(update?.sessionUpdate).toBe('tool_call_update')
-    if (update?.sessionUpdate !== 'tool_call_update') throw new Error('expected a tool_call_update')
-    expect(update).toMatchObject({ toolCallId: 'c1', status: 'completed' })
-    const content = update.content as { content: { text: string } }[]
-    expect(content[0]?.content.text).toBe('```console\nhello\n```')
-  })
-
-  it('replays a persisted todo/write as a plan sessionUpdate on load', async () => {
-    // A persisted `todo/write` must replay as an ACP plan update so a reopened editor sees the
-    // current plan, not just the tool transcript.
-    live = await makeBridgeHarness({
-      storageDir,
-      withTodo: true,
-      script: [
-        toolCallResponse('c1', 'todo_write', {
-          todos: [
-            { content: 'first step', status: 'in_progress' },
-            { content: 'second step', status: 'pending' },
-          ],
-        }),
-        textResponse('planned'),
-      ],
-    })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'plan it' }] })
-    await live.dispose()
-    live = undefined
-
-    loader = await makeBridgeHarness({ storageDir, withTodo: true, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-
-    const plan = loader.updates.find(u => u.sessionUpdate === 'plan')
-    expect(plan).toEqual({
-      sessionUpdate: 'plan',
-      entries: [
-        { content: 'first step', priority: 'medium', status: 'in_progress' },
-        { content: 'second step', priority: 'medium', status: 'pending' },
-      ],
-    })
-  })
-
-  it('replays a persisted bash call as a TERMINAL card when the loader advertises the capability', async () => {
-    // The presentation is resolved at replay time, so a loader that advertised
-    // _meta.terminal_output must reconstruct the terminal card (content + _meta)
-    // from the persisted log — identical to how it would have streamed live.
-    live = await makeBridgeHarness({
-      storageDir,
-      withBash: true,
-      script: [toolCallResponse('c1', 'bash', { command: 'echo hi', description: 'Greet' }), textResponse('done')],
-    })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'greet' }] })
-    await live.dispose()
-    live = undefined
-
-    loader = await makeBridgeHarness({ storageDir, withBash: true, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: { _meta: { terminal_output: true } } })
-    await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-
-    const call = loader.updates.find(u => u.sessionUpdate === 'tool_call')
-    if (call?.sessionUpdate !== 'tool_call') throw new Error('expected a tool_call')
-    // Replay reconstructs the terminal card: description block, then terminal block.
-    expect(call.content).toEqual([
-      { type: 'content', content: { type: 'text', text: 'Greet' } },
-      { type: 'terminal', terminalId: 'c1' },
-    ])
-    expect((call._meta as { terminal_info?: unknown }).terminal_info).toEqual({ terminal_id: 'c1', cwd: process.cwd() })
-    const update = loader.updates.find(u => u.sessionUpdate === 'tool_call_update')
-    if (update?.sessionUpdate !== 'tool_call_update') throw new Error('expected a tool_call_update')
-    // Terminal mode: content omitted, output + exit on _meta — matching live.
-    expect(update.content).toBeUndefined()
-    const meta = update._meta as { terminal_output?: { data: string }; terminal_exit?: { exit_code?: number } }
-    expect(meta.terminal_output?.data).toBe('hi\n')
-    expect(meta.terminal_exit?.exit_code).toBe(0)
-  })
-
-  it('keeps one terminal completion live and on replay when a pruning replacement is logged', async () => {
-    live = await makeBridgeHarness({
-      storageDir,
-      withBash: true,
-      script: [toolCallResponse('c1', 'bash', { command: 'echo full', description: 'Print full output' }), textResponse('done')],
-    })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: { _meta: { terminal_output: true } } })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'run it' }] })
-
-    const session = live.ctx.agents.get(SessionId(sessionId))!.session
-    const original = session.events.find(event => event.type === 'tool/result')
-    if (original?.type !== 'tool/result') throw new Error('expected original tool/result')
-    const liveCompletions = () => live!.updates.filter(update =>
-      update.sessionUpdate === 'tool_call_update' && update.toolCallId === 'c1')
-    expect(liveCompletions()).toHaveLength(1)
-    expect((liveCompletions()[0] as { _meta?: { terminal_output?: { data: string } } })._meta?.terminal_output?.data)
-      .toBe('full\n')
-
-    session.append('turn/start', { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } })
-    session.append('tool/result', {
-      ...original.data,
-      content: [{ type: 'text', text: '[... tool result middle pruned ...]' }],
-    }, {
-      surfaceOp: { op: 'replace', start: original.seq, end: original.seq },
-      sourceEventSeqs: [original.seq],
-    })
-    session.append('turn/end', { turn: 2, reason: { kind: 'completed' } })
-
-    // The replacement is durable but is not another live completion.
-    expect(session.events.filter(event => event.type === 'tool/result')).toHaveLength(2)
-    expect(JSON.stringify(session.deriveMessages())).toContain('tool result middle pruned')
-    expect(liveCompletions()).toHaveLength(1)
-    await live.dispose()
-    live = undefined
-
-    loader = await makeBridgeHarness({ storageDir, withBash: true, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: { _meta: { terminal_output: true } } })
-    await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-
-    const replayed = loader.updates.filter(update =>
-      update.sessionUpdate === 'tool_call_update' && update.toolCallId === 'c1')
-    expect(replayed).toHaveLength(1)
-    expect((replayed[0] as { _meta?: { terminal_output?: { data: string } } })._meta?.terminal_output?.data)
-      .toBe('full\n')
-  })
-
-  it('a load whose resume finishes after a client disconnect leaks no live session', async () => {
-    // Stall persistence so transport closes while resume is pending. Whether the SDK rejects first
-    // or the bridge's post-await guard fires, no agent may survive for the dead connection.
-    live = await makeBridgeHarness({ storageDir, script: [textResponse('x')] })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'hi' }] })
-    await live.dispose()
-    live = undefined
-
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const realLoad = loader.ctx.sessionPersistence.load.bind(loader.ctx.sessionPersistence)
-    let release!: () => void
-    const gate = new Promise<void>((r) => { release = r })
-    loader.ctx.sessionPersistence.load = async (id) => { await gate; return realLoad(id) }
-
-    const loadResult = loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-      .then(() => 'resolved' as const, () => 'rejected' as const)
-    await loader.closeClientTransport() // teardown sets `closed` while load is gated
-    release()                            // resume() finishes AFTER teardown
-    expect(await loadResult).toBe('rejected')
-    // No live agent was installed for the closed connection.
-    expect(loader.ctx.agents.get(SessionId(sessionId))).toBeUndefined()
-  })
-
-  it('rejects load when the requested cwd does not match the persisted session cwd', async () => {
-    // Seed a session on disk whose header.cwd is a DIFFERENT absolute path than the server's
-    // launch dir. Resume must retain the header cwd and route bash there rather than reject the
-    // mismatch or substitute the server cwd.
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    const otherCwd = '/some/other/workspace'
-    await loader.ctx.sessionPersistence.create({
-      version: SESSION_FORMAT_VERSION, id: SessionId('elsewhere'), createdAt: 1, cwd: otherCwd,
-    })
-    await loader.ctx.sessionPersistence.append(SessionId('elsewhere'), [
-      { type: 'turn/start', seq: 0, time: 0, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
-      { type: 'turn/end', seq: 1, time: 0, data: { turn: 1, reason: { kind: 'completed' } } },
-    ])
-
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(loader.client.loadSession({ sessionId: 'elsewhere', cwd: process.cwd(), mcpServers: [] }))
-      .rejects.toThrow(/cwd mismatch/)
-    expect(loader.ctx.agents.get(SessionId('elsewhere'))).toBeUndefined()
-
-    const res = await loader.client.loadSession({ sessionId: 'elsewhere', cwd: `${otherCwd}/.`, mcpServers: [] })
-    expect(res).toBeDefined()
-    expect(loader.ctx.agents.get(SessionId('elsewhere'))!.session.header.cwd).toBe(otherCwd)
-  })
-
-  it('rejects load for a non-absolute cwd (still required to be absolute)', async () => {
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(loader.client.loadSession({ sessionId: 's', cwd: 'rel', mcpServers: [] }))
-      .rejects.toThrow(/absolute/)
-  })
-
-  it('lets persistence reject a load for an unknown id after metadata lookup misses', async () => {
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(loader.client.loadSession({ sessionId: 'missing', cwd: process.cwd(), mcpServers: [] }))
-      .rejects.toThrow(/Internal error/)
-  })
-
-  it('rejects loading a persisted session that has NO cwd (would silently run in the launch dir)', async () => {
-    // A legacy/external log without `header.cwd` must be rejected; the request cwd does not override
-    // it, and accepting would let bash silently fall back to the server launch directory.
-    loader = await makeBridgeHarness({ storageDir, script: [] })
-    await loader.ctx.sessionPersistence.create({
-      version: SESSION_FORMAT_VERSION, id: SessionId('legacy'), createdAt: 1, // no cwd
-    })
-    await loader.ctx.sessionPersistence.append(SessionId('legacy'), [
-      { type: 'turn/start', seq: 0, time: 0, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
-      { type: 'turn/end', seq: 1, time: 0, data: { turn: 1, reason: { kind: 'completed' } } },
-    ])
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(loader.client.loadSession({ sessionId: 'legacy', cwd: process.cwd(), mcpServers: [] }))
-      .rejects.toThrow(/no absolute persisted cwd/)
-    // Rejected BEFORE resume (metadata-only check) — no agent was registered, so
-    // the id is not wedged: a later attempt hits the same clean rejection, not a
-    // duplicate-registration error.
-    expect(loader.ctx.agents.get(SessionId('legacy'))).toBeUndefined()
-    await expect(loader.client.loadSession({ sessionId: 'legacy', cwd: process.cwd(), mcpServers: [] }))
-      .rejects.toThrow(/no absolute persisted cwd/)
-  })
-
-  it('allows loading alongside an existing session but rejects re-loading the SAME id', async () => {
-    // Multi-session: a load can coexist with a live session, but loading an id
-    // that is already live is rejected (it is already loaded).
-    live = await makeBridgeHarness({ storageDir, script: [textResponse('one')] })
-    await live.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await live.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'hi' }] })
-    // A different new session coexists.
-    const other = await live.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(other.sessionId).not.toBe(sessionId)
-    // Re-loading the already-live id is rejected.
-    await expect(live.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] }))
-      .rejects.toThrow(/already loaded/)
-  })
-})
diff --git a/packages/ui/acp/tests/modes.spec.ts b/packages/ui/acp/tests/modes.spec.ts
deleted file mode 100644
index 7680d611c4..0000000000
--- a/packages/ui/acp/tests/modes.spec.ts
+++ /dev/null
@@ -1,116 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import { makeBridgeHarness, textResponse, type BridgeHarness, type CapturedUpdate } from './harness.ts'
-
-/** The `current_mode_update` notifications, in order. */
-function modeUpdates(updates: CapturedUpdate[]): string[] {
-  return updates
-    .filter(update => update.sessionUpdate === 'current_mode_update')
-    .map(update => update.currentModeId)
-}
-
-describe('acp bridge — plan mode projection', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-  let loader: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-modes-')) })
-  afterEach(async () => {
-    if (harness) await harness.dispose()
-    if (loader) await loader.dispose()
-    harness = loader = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('advertises no mode surface and rejects session/set_mode when plan mode is not composed', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const res = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(res.modes).toBeUndefined()
-    await expect(harness.client.setSessionMode({ sessionId: res.sessionId, modeId: 'plan' }))
-      .rejects.toMatchObject({ message: expect.stringContaining('session modes are not composed') as string })
-  })
-
-  it('advertises availableModes/currentModeId on session/new', async () => {
-    harness = await makeBridgeHarness({ storageDir, withModes: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const res = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    expect(res.modes).toEqual({
-      availableModes: [
-        { id: 'default', name: 'default' },
-        { id: 'plan', name: 'plan' },
-      ],
-      currentModeId: 'default',
-    })
-  })
-
-  it('session/set_mode records the pending intent and echoes one optimistic current_mode_update', async () => {
-    harness = await makeBridgeHarness({ storageDir, withModes: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await harness.client.setSessionMode({ sessionId, modeId: 'plan' })
-    expect(modeUpdates(harness.updates)).toEqual(['plan'])
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    expect(harness.ctx.planMode.get(agent)).toEqual({ active: false, pending: true })
-  })
-
-  it('rejects an unknown ACP mode id at the adapter boundary', async () => {
-    harness = await makeBridgeHarness({ storageDir, withModes: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await expect(harness.client.setSessionMode({ sessionId, modeId: 'nope' }))
-      .rejects.toMatchObject({ message: expect.stringContaining('unknown session mode "nope"') as string })
-    expect(modeUpdates(harness.updates)).toEqual([])
-  })
-
-  it('does not re-notify when the boundary flush logs the mode the picker already showed', async () => {
-    harness = await makeBridgeHarness({ storageDir, withModes: true, script: [textResponse('planning')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await harness.client.setSessionMode({ sessionId, modeId: 'plan' })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go plan' }] })
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    expect(agent.session.events.some(event => event.type === 'plan/mode')).toBe(true)
-    expect(modeUpdates(harness.updates)).toEqual(['plan'])
-  })
-
-  it('re-notifies on a logged flip the picker has not seen (the tool-driven exit shape)', async () => {
-    harness = await makeBridgeHarness({ storageDir, withModes: true, script: [textResponse('planning')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await harness.client.setSessionMode({ sessionId, modeId: 'plan' })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go plan' }] })
-    // A writer other than the picker (exit_plan_mode's execute) appends the
-    // flip back; the bridge must re-notify the client off the logged event.
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    agent.session.append('plan/mode', { active: false })
-    // The notification crosses the in-memory JSON-RPC transport asynchronously.
-    await new Promise(resolve => setTimeout(resolve, 20))
-    expect(modeUpdates(harness.updates)).toEqual(['plan', 'default'])
-  })
-
-  it('advertises the folded mode on session/load', async () => {
-    harness = await makeBridgeHarness({ storageDir, withModes: true, script: [textResponse('planning')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    await harness.client.setSessionMode({ sessionId, modeId: 'plan' })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go plan' }] })
-    await harness.dispose()
-    harness = undefined
-
-    loader = await makeBridgeHarness({ storageDir, withModes: true, script: [] })
-    await loader.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const res = await loader.client.loadSession({ sessionId, cwd: process.cwd(), mcpServers: [] })
-    expect(res.modes).toEqual({
-      availableModes: [
-        { id: 'default', name: 'default' },
-        { id: 'plan', name: 'plan' },
-      ],
-      currentModeId: 'plan',
-    })
-  })
-})
diff --git a/packages/ui/acp/tests/multi-session.spec.ts b/packages/ui/acp/tests/multi-session.spec.ts
deleted file mode 100644
index efeb00f9ad..0000000000
--- a/packages/ui/acp/tests/multi-session.spec.ts
+++ /dev/null
@@ -1,129 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { makeBridgeHarness, textResponse, type BridgeHarness, type CapturedUpdate } from './harness.ts'
-import { SessionId } from '@deepseek-ai/dsh-session'
-
-/** Text of the agent_message_chunk updates scoped to one session id. */
-function messageTextFor(updates: { sessionId?: string; update: CapturedUpdate }[], sessionId: string): string {
-  return updates
-    .filter(u => u.sessionId === sessionId && u.update.sessionUpdate === 'agent_message_chunk')
-    .map(u => (u.update.sessionUpdate === 'agent_message_chunk' && u.update.content.type === 'text' ? u.update.content.text : ''))
-    .join('')
-}
-
-describe('acp bridge — multi-session isolation', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-multi-')) })
-  afterEach(async () => {
-    if (harness) await harness.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('two sessions stream concurrently without interleaving their updates', async () => {
-    // Each session's prompt answer must arrive only on its own sessionId. The
-    // scripted adapter answers in send order; both prompts run, and the bridge
-    // demuxes every chunk by session id.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('answer-A'), textResponse('answer-B')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-
-    const [ra, rb] = await Promise.all([
-      harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'go A' }] }),
-      harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'go B' }] }),
-    ])
-    expect(ra.stopReason).toBe('end_turn')
-    expect(rb.stopReason).toBe('end_turn')
-
-    // A's text landed only on A; B's only on B (strict id demux, no interleave).
-    expect(messageTextFor(harness.sessionUpdates, a)).toContain('answer-A')
-    expect(messageTextFor(harness.sessionUpdates, a)).not.toContain('answer-B')
-    expect(messageTextFor(harness.sessionUpdates, b)).toContain('answer-B')
-    expect(messageTextFor(harness.sessionUpdates, b)).not.toContain('answer-A')
-  })
-
-  it('cancel in one session leaves the other session untouched', async () => {
-    // Session A hangs; session B completes normally. Cancelling A settles ONLY
-    // A as cancelled and never disturbs B's stream or result.
-    harness = await makeBridgeHarness({ storageDir, script: ['hang', textResponse('B done')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-
-    const aPromise = harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'hang A' }] })
-    await new Promise(r => setTimeout(r, 30))
-    await harness.client.cancel({ sessionId: a })
-    expect((await aPromise).stopReason).toBe('cancelled')
-
-    // B runs to completion, unaffected by A's cancel.
-    const rb = await harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'go B' }] })
-    expect(rb.stopReason).toBe('end_turn')
-    expect(messageTextFor(harness.sessionUpdates, b)).toContain('B done')
-  })
-
-  it('enforces one in-flight prompt PER session independently', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: ['hang', 'hang'] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-
-    // One in-flight prompt in EACH session is allowed (independent limits).
-    const aPromise = harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'one A' }] })
-    const bPromise = harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'one B' }] })
-    await new Promise(r => setTimeout(r, 30))
-    // A second prompt in A is rejected, but B's in-flight prompt is unaffected.
-    await expect(harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'two A' }] }))
-      .rejects.toThrow(/already in flight/)
-
-    await harness.client.cancel({ sessionId: a })
-    await harness.client.cancel({ sessionId: b })
-    expect((await aPromise).stopReason).toBe('cancelled')
-    expect((await bPromise).stopReason).toBe('cancelled')
-  })
-
-  it('a cancel for a non-existent session id is a silent no-op (does not touch others)', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('A done')] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-    await expect(harness.client.cancel({ sessionId: 'ghost' })).resolves.toBeUndefined()
-    // A still works after a cancel for an unknown id.
-    const ra = await harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'go A' }] })
-    expect(ra.stopReason).toBe('end_turn')
-  })
-
-  it('disposing the whole bridge drains all live sessions to quiescence', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: ['hang', 'hang'] })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const a = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-    const b = (await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })).sessionId
-    const agentA = harness.ctx.agents.get(SessionId(a))!
-    const agentB = harness.ctx.agents.get(SessionId(b))!
-
-    // Wait deterministically for BOTH agents to enter `running` (not a fixed
-    // sleep — agent startup latency is unbounded on a loaded worker).
-    const running = (agent: typeof agentA) => agent.status === 'running'
-      ? Promise.resolve()
-      : new Promise<void>((resolve) => {
-        const dispose = harness!.ctx.on('agent/status', (subject, status) => {
-          if (subject === agent && status === 'running') { dispose(); resolve() }
-        })
-      })
-    void harness.client.prompt({ sessionId: a, prompt: [{ type: 'text', text: 'go A' }] }).catch(() => {})
-    void harness.client.prompt({ sessionId: b, prompt: [{ type: 'text', text: 'go B' }] }).catch(() => {})
-    await Promise.all([running(agentA), running(agentB)])
-    expect(agentA.status).toBe('running')
-    expect(agentB.status).toBe('running')
-
-    await harness.ctx.fiber.dispose()
-    // BOTH agents drained (not still running) — teardown reached quiescence
-    // across all sessions, not just one.
-    expect(agentA.status).not.toBe('running')
-    expect(agentB.status).not.toBe('running')
-  })
-})
diff --git a/packages/ui/acp/tests/properties.spec.ts b/packages/ui/acp/tests/properties.spec.ts
deleted file mode 100644
index af661d0eed..0000000000
--- a/packages/ui/acp/tests/properties.spec.ts
+++ /dev/null
@@ -1,112 +0,0 @@
-/**
- * Property-based protocol-shape tests for the ACP update stream (RFC 001 → ADR 0013
- * precedent). Fuzz arbitrary harness `SessionEvent` sequences through the pure
- * `streamSessionEventUpdate` translator and assert legal update variants, call-before-result order
- * per tool id, and deterministic event-to-update translation. Keeping this pure makes live and
- * replay equivalence deterministic rather than a timing property.
- */
-
-import { describe, expect, it } from 'vitest'
-import fc from 'fast-check'
-import { CallId } from '@deepseek-ai/dsh-llm'
-import { SessionId, type SessionEvent } from '@deepseek-ai/dsh-session'
-import type { SessionNotification } from '@agentclientprotocol/sdk'
-import { streamSessionEventUpdate } from '../src/index.ts'
-
-const LEGAL_UPDATE_KINDS = new Set([
-  'agent_message_chunk',
-  'agent_thought_chunk',
-  'tool_call',
-  'tool_call_update',
-])
-
-/**
- * Build a WELL-FORMED harness event sequence: a list of "actions" where a tool
- * result can only reference a call already opened earlier. This mirrors what
- * the loop actually appends (tool/call always precedes its tool/result), so the
- * ordering invariant is asserted over realistic logs, not arbitrary noise.
- */
-type Action =
-  | { kind: 'text'; text: string }
-  | { kind: 'reasoning'; text: string }
-  | { kind: 'call'; id: string; name: string }
-  | { kind: 'result'; idx: number; isError: boolean }
-  | { kind: 'ignored' }
-
-function actionsArb(): fc.Arbitrary<Action[]> {
-  const action: fc.Arbitrary<Action> = fc.oneof(
-    fc.string().map((text): Action => ({ kind: 'text', text })),
-    fc.string().map((text): Action => ({ kind: 'reasoning', text })),
-    fc.record({ id: fc.string({ minLength: 1 }), name: fc.string() }).map(({ id, name }): Action => ({ kind: 'call', id, name })),
-    fc.record({ idx: fc.nat(), isError: fc.boolean() }).map(({ idx, isError }): Action => ({ kind: 'result', idx, isError })),
-    fc.constant<Action>({ kind: 'ignored' }),
-  )
-  return fc.array(action, { maxLength: 30 })
-}
-
-/** Lower well-formed actions into a harness event sequence. */
-function actionsToEvents(actions: Action[]): SessionEvent[] {
-  const events: SessionEvent[] = []
-  const openCalls: string[] = []
-  for (const a of actions) {
-    switch (a.kind) {
-      case 'text':
-        events.push({ type: 'assistant/chunk', seq: 0, time: 0, data: { turn: 1, step: 1, chunk: { type: 'text-delta', index: 0, text: a.text } } })
-        break
-      case 'reasoning':
-        events.push({ type: 'assistant/chunk', seq: 0, time: 0, data: { turn: 1, step: 1, chunk: { type: 'reasoning-delta', index: 0, text: a.text } } })
-        break
-      case 'call':
-        openCalls.push(a.id)
-        events.push({ type: 'tool/call', seq: 0, time: 0, data: { turn: 1, step: 1, callId: CallId(a.id), name: a.name, arguments: '{}' } })
-        break
-      case 'result': {
-        // Only emit a result for an already-opened call (well-formedness).
-        if (openCalls.length === 0) break
-        const id = openCalls[a.idx % openCalls.length]!
-        events.push({ type: 'tool/result', seq: 0, time: 0, data: { turn: 1, step: 1, callId: CallId(id), content: [], isError: a.isError } })
-        break
-      }
-      case 'ignored':
-        events.push({ type: 'turn/end', seq: 0, time: 0, data: { turn: 1, reason: { kind: 'completed' } } })
-        break
-    }
-  }
-  return events
-}
-
-function runStream(events: SessionEvent[]): SessionNotification['update'][] {
-  const out: SessionNotification['update'][] = []
-  for (const event of events) streamSessionEventUpdate(SessionId('s1'), event, n => out.push(n.update))
-  return out
-}
-
-describe('ACP update-stream invariants (property-based)', () => {
-  it('every emitted update is a legal SessionUpdate variant', () => {
-    fc.assert(fc.property(actionsArb(), (actions) => {
-      for (const update of runStream(actionsToEvents(actions))) {
-        expect(LEGAL_UPDATE_KINDS.has(update.sessionUpdate)).toBe(true)
-      }
-    }))
-  })
-
-  it('never emits a tool_call_update for an id before that id\'s tool_call', () => {
-    fc.assert(fc.property(actionsArb(), (actions) => {
-      const seenCall = new Set<string>()
-      for (const update of runStream(actionsToEvents(actions))) {
-        if (update.sessionUpdate === 'tool_call') {
-          seenCall.add(update.toolCallId)
-        } else if (update.sessionUpdate === 'tool_call_update') {
-          expect(seenCall.has(update.toolCallId)).toBe(true)
-        }
-      }
-    }))
-  })
-
-  it('is a pure function of the event (replay equals live)', () => {
-    fc.assert(fc.property(actionsArb(), (actions) => {
-      const events = actionsToEvents(actions)
-      expect(runStream(events)).toEqual(runStream(events))
-    }))
-  })
-})
diff --git a/packages/ui/acp/tests/session-list.spec.ts b/packages/ui/acp/tests/session-list.spec.ts
deleted file mode 100644
index fe9e554e60..0000000000
--- a/packages/ui/acp/tests/session-list.spec.ts
+++ /dev/null
@@ -1,92 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import { SessionId } from '@deepseek-ai/dsh-session'
-import type {} from '@deepseek-ai/dsh-session-title'
-import { encodeSessionReferenceUri } from '@deepseek-ai/dsh-session-reference'
-import { ACP_SESSION_REFERENCE_META_KEY } from '../src/index.ts'
-import { makeBridgeHarness, type BridgeHarness } from './harness.ts'
-
-describe('acp bridge — session/list', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-list-')) })
-  afterEach(async () => {
-    await harness?.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('advertises title-aware listing and reference metadata for loadable sessions', async () => {
-    harness = await makeBridgeHarness({ storageDir, withSessionReferences: true })
-    const initialized = await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    expect(initialized.agentCapabilities?.sessionCapabilities?.list).toEqual({})
-
-    const cwd = process.cwd()
-    const { sessionId } = await harness.client.newSession({ cwd, mcpServers: [] })
-    const session = harness.ctx.agents.get(SessionId(sessionId))!.session
-    await harness.ctx.sessions.appendOutOfBand(session, 'session/title', {
-      title: 'Reference source title',
-      messageSeqs: [],
-      source: { kind: 'fallback' },
-    }, { kind: 'session-title' })
-    harness.ctx.sessions.create(SessionId('untitled'), { meta: { cwd: join(storageDir, 'other') } })
-    harness.ctx.sessions.create(SessionId('missing-cwd'))
-
-    const listed = await harness.client.listSessions({})
-    expect(listed.nextCursor).toBeUndefined()
-    expect(listed.sessions.map(item => item.sessionId)).toEqual(expect.arrayContaining([sessionId, 'untitled']))
-    expect(listed.sessions.map(item => item.sessionId)).not.toContain('missing-cwd')
-    const source = listed.sessions.find(item => item.sessionId === sessionId)
-    expect(source).toMatchObject({ cwd, title: 'Reference source title' })
-    expect(source?._meta?.[ACP_SESSION_REFERENCE_META_KEY]).toEqual({
-      uri: encodeSessionReferenceUri(SessionId(sessionId)),
-    })
-    expect(listed.sessions.find(item => item.sessionId === 'untitled')).not.toHaveProperty('title')
-  })
-
-  it('filters by normalized cwd and omits reference metadata without the optional capability', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const firstCwd = join(storageDir, 'first')
-    const secondCwd = join(storageDir, 'second')
-    const first = await harness.client.newSession({ cwd: firstCwd, mcpServers: [] })
-    await harness.client.newSession({ cwd: secondCwd, mcpServers: [] })
-
-    const listed = await harness.client.listSessions({ cursor: null, cwd: firstCwd })
-    expect(listed.sessions).toHaveLength(1)
-    expect(listed.sessions[0]).toMatchObject({ sessionId: first.sessionId, cwd: firstCwd })
-    expect(listed.sessions[0]?._meta).toBeUndefined()
-    await expect(harness.client.listSessions({ cwd: null })).resolves.toHaveProperty('sessions')
-  })
-
-  it('rejects unsupported cursors and relative cwd filters', async () => {
-    harness = await makeBridgeHarness({ storageDir })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(harness.client.listSessions({ cursor: 'next' })).rejects.toThrow('session/list does not paginate')
-    await expect(harness.client.listSessions({ cwd: 'relative' })).rejects.toThrow('session/list cwd must be absolute')
-  })
-
-  it('folds titles from persisted sessions in a fresh bridge', async () => {
-    harness = await makeBridgeHarness({ storageDir, withSessionReferences: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    const cwd = process.cwd()
-    const { sessionId } = await harness.client.newSession({ cwd, mcpServers: [] })
-    const session = harness.ctx.agents.get(SessionId(sessionId))!.session
-    await harness.ctx.sessions.appendOutOfBand(session, 'session/title', {
-      title: 'Persisted reference title',
-      messageSeqs: [],
-      source: { kind: 'fallback' },
-    }, { kind: 'session-title' })
-    await harness.dispose()
-
-    harness = await makeBridgeHarness({ storageDir, withSessionReferences: true })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await expect(harness.client.listSessions({ cwd })).resolves.toMatchObject({
-      sessions: [{ sessionId, cwd, title: 'Persisted reference title' }],
-    })
-  })
-})
diff --git a/packages/ui/acp/tests/stream-update.spec.ts b/packages/ui/acp/tests/stream-update.spec.ts
deleted file mode 100644
index 2585968b7e..0000000000
--- a/packages/ui/acp/tests/stream-update.spec.ts
+++ /dev/null
@@ -1,966 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import { join as pathJoin, resolve as pathResolve } from 'node:path'
-import { Context } from 'cordis'
-import { CallId } from '@deepseek-ai/dsh-llm'
-import { SessionId, type SessionEvent } from '@deepseek-ai/dsh-session'
-import type {} from '@deepseek-ai/dsh-session-title'
-import type { SessionNotification } from '@agentclientprotocol/sdk'
-import type { ToolDefinition, ToolRegistry as ToolRegistryType } from '@deepseek-ai/dsh-tools'
-import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
-import ToolRegistry from '@deepseek-ai/dsh-tools'
-import FsLocal from '@deepseek-ai/dsh-fs-local'
-import * as ToolFs from '@deepseek-ai/dsh-tool-fs'
-import { streamSessionEventUpdate, agentOptions, todosToPlan, ToolPresenter } from '../src/index.ts'
-
-const UNUSED_TOOL_OUTPUT: ToolDefinition['output'] = {
-  schema: { type: 'null' },
-  render: () => [],
-}
-
-/** Collect the updates a single event produces (no presenter → generic fallback). */
-function updatesFor(event: SessionEvent): SessionNotification['update'][] {
-  const out: SessionNotification['update'][] = []
-  streamSessionEventUpdate(SessionId('s1'), event, n => out.push(n.update))
-  return out
-}
-
-/** Collect the updates emitted by the live prompt stream (user echo suppressed). */
-function liveUpdatesFor(event: SessionEvent): SessionNotification['update'][] {
-  const out: SessionNotification['update'][] = []
-  streamSessionEventUpdate(SessionId('s1'), event, n => out.push(n.update), undefined, undefined, { includeUserMessages: false })
-  return out
-}
-
-/** A tiny tool registry stub exposing just `get` for {@link ToolPresenter}. */
-function registryOf(...tools: ToolDefinition[]): Pick<ToolRegistryType, 'get'> {
-  const map = new Map(tools.map(t => [t.name, t]))
-  return { get: name => map.get(name) }
-}
-
-function updatesWith(presenter: ToolPresenter, ...events: SessionEvent[]): SessionNotification['update'][] {
-  const out: SessionNotification['update'][] = []
-  for (const event of events) streamSessionEventUpdate(SessionId('s1'), event, n => out.push(n.update), presenter)
-  return out
-}
-
-async function fsCtx(): Promise<Context> {
-  const ctx = new Context()
-  await ctx.plugin(SystemPrompt)
-  await ctx.plugin(ToolRegistry)
-  await ctx.plugin(FsLocal)
-  await ctx.plugin(ToolFs)
-  return ctx
-}
-
-function evt<T extends SessionEvent['type']>(type: T, data: Extract<SessionEvent, { type: T }>['data']): SessionEvent {
-  return { type, seq: 0, time: 0, data } as SessionEvent
-}
-
-/** ACP path fields are filesystem paths; expectations use the host separator. */
-function nativePath(...segments: string[]): string {
-  return pathJoin(...segments)
-}
-
-/** Resolve root-relative fixtures the same way the bridge does on this host. */
-function nativeAbsolute(...segments: string[]): string {
-  return pathResolve(...segments)
-}
-
-describe('streamSessionEventUpdate', () => {
-  it('maps a title event to session_info_update with the event timestamp', () => {
-    expect(updatesFor({
-      type: 'session/title',
-      seq: 3,
-      time: 1_725_000_000_000,
-      data: {
-        title: 'Log-backed titles',
-        messageSeqs: [1],
-        source: { kind: 'fallback' },
-      },
-    })).toEqual([{
-      sessionUpdate: 'session_info_update',
-      title: 'Log-backed titles',
-      updatedAt: new Date(1_725_000_000_000).toISOString(),
-    }])
-  })
-
-  it('maps assistant/chunk text-delta to agent_message_chunk', () => {
-    expect(updatesFor(evt('assistant/chunk', { turn: 1, step: 1, chunk: { type: 'text-delta', index: 0, text: 'hi' } })))
-      .toEqual([{ sessionUpdate: 'agent_message_chunk', content: { type: 'text', text: 'hi' } }])
-  })
-
-  it('maps assistant/chunk reasoning-delta to agent_thought_chunk', () => {
-    expect(updatesFor(evt('assistant/chunk', { turn: 1, step: 1, chunk: { type: 'reasoning-delta', index: 0, text: 'mm' } })))
-      .toEqual([{ sessionUpdate: 'agent_thought_chunk', content: { type: 'text', text: 'mm' } }])
-  })
-
-  it('produces no update for a non-text/reasoning chunk (e.g. block-start)', () => {
-    expect(updatesFor(evt('assistant/chunk', { turn: 1, step: 1, chunk: { type: 'block-start', index: 0, blockType: 'text' } })))
-      .toEqual([])
-  })
-
-  it('marks retry and terminal model failure boundaries but not ordinary turn errors', () => {
-    expect(updatesFor(evt('llm/retry', {
-      turn: 1,
-      step: 1,
-      retry: 1,
-      maxRetries: 2,
-      delayMs: 500,
-      failure: { message: 'backend busy', code: 'SERVER' },
-    }))).toEqual([{
-      sessionUpdate: 'agent_message_chunk',
-      content: {
-        type: 'text',
-        text: '\n\n[Previous model attempt discarded; retrying 1/2 in 500ms: backend busy]\n\n',
-      },
-    }])
-    expect(updatesFor(evt('turn/end', {
-      turn: 1,
-      reason: { kind: 'error', step: 2, failure: { message: 'still busy', code: 'SERVER' } },
-    }))).toEqual([{
-      sessionUpdate: 'agent_message_chunk',
-      content: {
-        type: 'text',
-        text: '\n\n[Model attempt failed; any partial output above is discarded: still busy]\n\n',
-      },
-    }])
-    expect(updatesFor(evt('turn/end', {
-      turn: 1,
-      reason: { kind: 'error', step: 2, message: 'post-step failed' },
-    }))).toEqual([])
-  })
-
-  it('maps tool/call to an in_progress tool_call with kind other and parsed rawInput (generic fallback, no presenter)', () => {
-    const updates = updatesFor(evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'bash', arguments: '{"command":"ls"}' }))
-    expect(updates).toEqual([{
-      sessionUpdate: 'tool_call',
-      toolCallId: 'c1',
-      title: 'bash',
-      // The fallback never sniffs a kind from the tool name — even a name a
-      // first-party tool uses (`bash`) renders `other`; kinds are tool-owned
-      // via presentCall.
-      kind: 'other',
-      status: 'in_progress',
-      rawInput: { command: 'ls' },
-    }])
-  })
-
-  it('falls back to the raw argument string when tool arguments are not JSON', () => {
-    const update = updatesFor(evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'bash', arguments: 'not json' }))[0]
-    expect((update as { rawInput: unknown }).rawInput).toBe('not json')
-  })
-
-  it('parses EMPTY tool arguments to an empty-object rawInput (a zero-arg call, not the raw-string fallback)', () => {
-    // `JSON.parse('')` throws, so without the empty-string guard a zero-arg
-    // call would render `rawInput: ''` via the non-JSON fallback; the guard
-    // normalizes it to `{}`.
-    const update = updatesFor(evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'noop', arguments: '' }))[0]
-    expect((update as { rawInput: unknown }).rawInput).toEqual({})
-  })
-
-  it('maps tool/result to completed/failed tool_call_update with text content', () => {
-    const ok = updatesFor(evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'out' }], isError: false }))
-    expect(ok).toEqual([{
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      content: [{ type: 'content', content: { type: 'text', text: 'out' } }],
-    }])
-    const failed = updatesFor(evt('tool/result', { turn: 1, step: 1, callId: CallId('c2'), content: [], isError: true }))
-    expect((failed[0] as { status: string }).status).toBe('failed')
-  })
-
-  it('emits no execution update for a tool-result surface replacement', () => {
-    const replacement = {
-      ...evt('tool/result', {
-        turn: 1,
-        step: 1,
-        callId: CallId('c1'),
-        content: [{ type: 'text', text: '[... tool result middle pruned ...]' }],
-        isError: false,
-      }),
-      seq: 2,
-      surfaceOp: { op: 'replace', start: 1, end: 1 },
-      sourceEventSeqs: [1],
-    } as SessionEvent
-    expect(updatesFor(replacement)).toEqual([])
-  })
-
-  it('drops non-text tool-result content (text-only)', () => {
-    const update = updatesFor(evt('tool/result', {
-      turn: 1, step: 1, callId: CallId('c1'),
-      content: [{ type: 'reasoning', text: 'private' }],
-      isError: false,
-    }))[0]
-    expect((update as { content: unknown[] }).content).toEqual([])
-  })
-
-  it('maps user/message text blocks to user_message_chunk (load replays the user side)', () => {
-    // A text block surfaces; a non-text block (here a tool-call) is skipped, so
-    // only the text chunk is emitted.
-    expect(updatesFor(evt('user/message', {
-      content: [
-        { type: 'text', text: 'hi' },
-        { type: 'tool-call', id: CallId('c'), name: 'bash', arguments: '{}' },
-      ],
-      source: { kind: 'user' },
-    }))).toEqual([{ sessionUpdate: 'user_message_chunk', content: { type: 'text', text: 'hi' } }])
-    // A user/message with no text-bearing blocks produces no chunk.
-    expect(updatesFor(evt('user/message', { content: [], source: { kind: 'user' } }))).toEqual([])
-  })
-
-  it('replays only the direct prompt from a prefixed user message', () => {
-    expect(updatesFor(evt('user/message', {
-      content: [
-        { type: 'text', text: 'internal prefix' },
-        { type: 'text', text: '\n\n## My request:\n' },
-        { type: 'text', text: 'visible request' },
-      ],
-      source: { kind: 'user' },
-      envelope: {
-        displayContent: [{ type: 'text', text: 'visible request' }],
-        prefixContexts: [{ source: { kind: 'plugin', plugin: 'reference' } }],
-      },
-    }))).toEqual([{
-      sessionUpdate: 'user_message_chunk',
-      content: { type: 'text', text: 'visible request' },
-    }])
-  })
-
-  it('can suppress user/message chunks for live prompt turns', () => {
-    expect(liveUpdatesFor(evt('user/message', {
-      content: [{ type: 'text', text: 'hi' }],
-      source: { kind: 'user' },
-    }))).toEqual([])
-  })
-
-  it('produces no update for boundary/other event types', () => {
-    expect(updatesFor(evt('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } }))).toEqual([])
-    expect(updatesFor(evt('turn/end', { turn: 1, reason: { kind: 'completed' } }))).toEqual([])
-    expect(updatesFor(evt('step/start', { turn: 1, step: 1 }))).toEqual([])
-  })
-
-  it('maps todo/write to a plan sessionUpdate with priority synthesized as medium', () => {
-    expect(updatesFor(evt('todo/write', {
-      todos: [
-        { content: 'plan the work', status: 'in_progress' },
-        { content: 'write the code', status: 'pending' },
-        { content: 'run the tests', status: 'completed' },
-      ],
-    }))).toEqual([{
-      sessionUpdate: 'plan',
-      entries: [
-        { content: 'plan the work', priority: 'medium', status: 'in_progress' },
-        { content: 'write the code', priority: 'medium', status: 'pending' },
-        { content: 'run the tests', priority: 'medium', status: 'completed' },
-      ],
-    }])
-  })
-
-  it('maps an empty todo list to a plan with no entries', () => {
-    expect(updatesFor(evt('todo/write', { todos: [] }))).toEqual([{ sessionUpdate: 'plan', entries: [] }])
-  })
-})
-
-describe('todosToPlan', () => {
-  it('maps status 1:1 and stamps every entry priority medium', () => {
-    expect(todosToPlan([
-      { content: 'a', status: 'pending' },
-      { content: 'b', status: 'in_progress' },
-      { content: 'c', status: 'completed' },
-    ])).toEqual({
-      entries: [
-        { content: 'a', priority: 'medium', status: 'pending' },
-        { content: 'b', priority: 'medium', status: 'in_progress' },
-        { content: 'c', priority: 'medium', status: 'completed' },
-      ],
-    })
-  })
-})
-
-describe('ToolPresenter (tool-owned presentation via the tool registry)', () => {
-  /** A tool whose presentCall/presentResult return generic-card views. */
-  const bashLike: ToolDefinition = {
-    name: 'bash',
-    description: 'run a command',
-    parameters: {},
-    output: UNUSED_TOOL_OUTPUT,
-    execute: async () => [],
-    presentCall: (args: unknown) => {
-      const a = args as { command: string; description: string }
-      return { card: 'generic', title: a.description, kind: 'execute', rawInput: a.command }
-    },
-    presentResult: (_args: unknown, result: { content: { type: string }[] }) => ({
-      card: 'generic',
-      content: [{ type: 'text', text: `wrapped:${result.content.length}` }],
-    }),
-  }
-
-  it('tool/call uses the tool: description→title, command→rawInput, tool kind', () => {
-    const presenter = new ToolPresenter(registryOf(bashLike))
-    const [update] = updatesWith(presenter, evt('tool/call', {
-      turn: 1, step: 1, callId: CallId('c1'), name: 'bash',
-      arguments: JSON.stringify({ command: 'ls -la', description: 'List files' }),
-    }))
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call',
-      toolCallId: 'c1',
-      title: 'List files',
-      kind: 'execute',
-      status: 'in_progress',
-      rawInput: 'ls -la',
-    })
-  })
-
-  it('tool/result uses the tool to reformat content (resolved by the remembered tool/call)', () => {
-    const presenter = new ToolPresenter(registryOf(bashLike))
-    const updates = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'bash', arguments: JSON.stringify({ command: 'x', description: 'd' }) }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'out' }], isError: false }),
-    )
-    expect(updates[1]).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      content: [{ type: 'content', content: { type: 'text', text: 'wrapped:1' } }],
-    })
-  })
-
-  it('a result with NO preceding call (unknown callId) falls back to the raw content', () => {
-    const presenter = new ToolPresenter(registryOf(bashLike))
-    // No tool/call for c9 → presenter has nothing remembered → generic fallback.
-    const [update] = updatesWith(presenter, evt('tool/result', {
-      turn: 1, step: 1, callId: CallId('c9'), content: [{ type: 'text', text: 'raw' }], isError: false,
-    }))
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c9',
-      status: 'completed',
-      content: [{ type: 'content', content: { type: 'text', text: 'raw' } }],
-    })
-  })
-
-  it('a tool with no presentCall/presentResult gets the generic fallback (title = name)', () => {
-    const plain: ToolDefinition = { name: 'plain', description: 'p', parameters: {}, output: UNUSED_TOOL_OUTPUT, execute: async () => [] }
-    const presenter = new ToolPresenter(registryOf(plain))
-    const [update] = updatesWith(presenter, evt('tool/call', {
-      turn: 1, step: 1, callId: CallId('c1'), name: 'plain', arguments: '{"a":1}',
-    }))
-    expect(update).toMatchObject({ title: 'plain', kind: 'other', rawInput: { a: 1 } })
-  })
-
-  it('a presentation that omits kind/content/rawInput uses the defaults (kind other, raw result content kept)', () => {
-    // A minimal tool-owned presentation: presentCall returns only a title (no
-    // kind → defaults to `other`, no rawInput → omitted); presentResult returns
-    // only a title (no content → the raw result content is kept).
-    const minimal: ToolDefinition = {
-      name: 'mini',
-      description: 'm',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      presentCall: () => ({ card: 'generic', title: 'Doing a thing' }),
-      presentResult: () => ({ card: 'generic', title: 'Did the thing' }),
-    }
-    const presenter = new ToolPresenter(registryOf(minimal))
-    const updates = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'mini', arguments: '{}' }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'kept' }], isError: false }),
-    )
-    // No kind → 'other'; no rawInput key at all.
-    expect(updates[0]).toEqual({ sessionUpdate: 'tool_call', toolCallId: 'c1', title: 'Doing a thing', kind: 'other', status: 'in_progress' })
-    // Title replaced; content falls back to the raw result content.
-    expect(updates[1]).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      content: [{ type: 'content', content: { type: 'text', text: 'kept' } }],
-      title: 'Did the thing',
-    })
-  })
-
-  it('holds ONLY in-flight calls: the callId entry is removed once its result is presented', () => {
-    const presenter = new ToolPresenter(registryOf(bashLike))
-    updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'bash', arguments: JSON.stringify({ command: 'x', description: 'd' }) }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'o' }], isError: false }),
-    )
-    // A SECOND result for the same callId now finds nothing remembered, so it
-    // falls back to raw content (proving the first result consumed the entry —
-    // the map does not retain finished calls).
-    const [late] = updatesWith(presenter, evt('tool/result', {
-      turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'late' }], isError: false,
-    }))
-    expect(late).toMatchObject({ content: [{ type: 'content', content: { type: 'text', text: 'late' } }] })
-  })
-
-  it('a THROWING presentCall/presentResult is contained: generic fallback + onError, never propagates', () => {
-    // A buggy tool whose display callbacks throw must not fail a live turn or a session/load
-    // replay (docs/defensive-patterns.md "contain callback exceptions at the boundary"). The
-    // presenter reports the error and falls back to generic rendering.
-    const boom: ToolDefinition = {
-      name: 'boom',
-      description: 'b',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      presentCall: () => { throw new Error('call boom') },
-      presentResult: () => { throw new Error('result boom') },
-    }
-    const errors: string[] = []
-    const presenter = new ToolPresenter(registryOf(boom), msg => errors.push(msg))
-    const updates = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'boom', arguments: '{"a":1}' }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'raw' }], isError: false }),
-    )
-    // tool/call fell back to title=name, raw args as rawInput.
-    expect(updates[0]).toMatchObject({ sessionUpdate: 'tool_call', title: 'boom', kind: 'other', rawInput: { a: 1 } })
-    // tool/result fell back to the raw content.
-    expect(updates[1]).toMatchObject({ sessionUpdate: 'tool_call_update', content: [{ type: 'content', content: { type: 'text', text: 'raw' } }] })
-    // Both throws were reported, not propagated.
-    expect(errors).toHaveLength(2)
-    expect(errors[0]).toContain('presentCall threw')
-    expect(errors[1]).toContain('presentResult threw')
-  })
-
-  it('contains a throwing presenter even with the DEFAULT (no-op) onError sink', () => {
-    // Constructed without an onError sink (the default `() => {}`): a throwing
-    // presenter is still swallowed and falls back generically — the absence of a
-    // logger must not turn a display bug into a propagated exception.
-    const boom: ToolDefinition = {
-      name: 'boom',
-      description: 'b',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      presentCall: () => { throw new Error('call boom') },
-      presentResult: () => { throw new Error('result boom') },
-    }
-    const presenter = new ToolPresenter(registryOf(boom))
-    const updates = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'boom', arguments: '{}' }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'raw' }], isError: false }),
-    )
-    expect(updates[0]).toMatchObject({ sessionUpdate: 'tool_call', title: 'boom' })
-    expect(updates[1]).toMatchObject({ sessionUpdate: 'tool_call_update', content: [{ type: 'content', content: { type: 'text', text: 'raw' } }] })
-  })
-
-  it('an unknown render-intent card throws via the exhaustiveness guard (closed union)', () => {
-    // The bridge switches on `view.card` and ends with assertNever: a rogue card
-    // (only reachable by a cast — the union is closed) must throw, so adding a
-    // real variant later fails to compile at the switch instead of silently
-    // dropping the card.
-    const rogue: ToolDefinition = {
-      name: 'rogue',
-      description: 'r',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      // A card value outside the union — forced with a cast (no valid input reaches this).
-      presentCall: () => ({ card: 'chart', title: 'nope' }) as unknown as ReturnType<NonNullable<ToolDefinition['presentCall']>>,
-    }
-    const presenter = new ToolPresenter(registryOf(rogue))
-    expect(() => updatesWith(presenter, evt('tool/call', {
-      turn: 1, step: 1, callId: CallId('c1'), name: 'rogue', arguments: '{}',
-    }))).toThrow('unreachable variant')
-  })
-
-  it('an unknown render-intent RESULT card throws via the exhaustiveness guard (closed union)', () => {
-    // The result-side renderer is also an exhaustive switch + assertNever: a rogue
-    // result card (only reachable by a cast) must throw, so adding a real result
-    // variant later fails to compile at the switch.
-    const rogue: ToolDefinition = {
-      name: 'rogue',
-      description: 'r',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      presentCall: () => ({ card: 'generic', title: 'r' }),
-      presentResult: () => ({ card: 'chart' }) as unknown as ReturnType<NonNullable<ToolDefinition['presentResult']>>,
-    }
-    const presenter = new ToolPresenter(registryOf(rogue))
-    expect(() => updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'rogue', arguments: '{}' }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'x' }], isError: false }),
-    )).toThrow('unreachable variant')
-  })
-
-  it('forwards fs-tool render intents onto the wire (REAL read → generic locations, edit → diff content)', async () => {
-    // Use the SHIPPING fs tools (not a stand-in), booted through their real
-    // plugins, so the wire tool_call carries the actual presentCall output —
-    // read's follow-along `locations` and edit's `diff` content block. (docs/testing.md
-    // "prefer the real implementation over a mock".)
-    const ctx = new Context()
-    await ctx.plugin(SystemPrompt)
-    await ctx.plugin(ToolRegistry)
-    await ctx.plugin(FsLocal)
-    await ctx.plugin(ToolFs)
-    const presenter = new ToolPresenter(ctx.tools)
-
-    const [readCall] = updatesWith(presenter, evt('tool/call', {
-      turn: 1, step: 1, callId: CallId('r1'), name: 'read',
-      arguments: JSON.stringify({ file_path: 'src/a.ts', offset: 12 }),
-    }))
-    // A generic card: the read window is in the title, the offset drives the
-    // follow-along location line. No rawInput (the window lives in the title).
-    expect(readCall).toMatchObject({
-      sessionUpdate: 'tool_call', toolCallId: 'r1', title: 'Read src/a.ts (from line 12)', kind: 'read',
-      locations: [{ path: 'src/a.ts', line: 12 }],
-    })
-    expect((readCall as { rawInput?: unknown }).rawInput).toBeUndefined()
-
-    const [editCall] = updatesWith(presenter, evt('tool/call', {
-      turn: 1, step: 1, callId: CallId('e1'), name: 'edit',
-      arguments: JSON.stringify({ file_path: 'src/b.ts', old_string: 'x', new_string: 'y' }),
-    }))
-    // A diff card: `edit` kind, a `{ type: 'diff' }` content block carrying the
-    // literal old→new replacement, plus the follow-along location.
-    expect(editCall).toMatchObject({
-      sessionUpdate: 'tool_call', toolCallId: 'e1', title: 'Edit src/b.ts', kind: 'edit',
-      locations: [{ path: 'src/b.ts' }],
-      content: [{ type: 'diff', path: 'src/b.ts', oldText: 'x', newText: 'y' }],
-    })
-    await ctx.fiber.dispose()
-  })
-})
-
-describe('terminal-card mapping (capability-gated)', () => {
-  // A tool that renders as a terminal — a stand-in for tool-bash's shape, letting
-  // us drive the bridge's terminal mapping without the real executor. `callCard`
-  // selects a terminal call view (optionally with a cwd) or a generic one (for the
-  // orphan-guard test); `resultTerminal` is the terminal result view's output/exit.
-  type CallCard = { card: 'terminal'; cwd?: string } | { card: 'generic' }
-  type ResultTerm = { title?: string; output?: string; exitCode?: number; signal?: string }
-  const termTool = (callCard: CallCard, resultTerminal: ResultTerm): ToolDefinition => ({
-    name: 'bash',
-    description: 'run a command',
-    parameters: {},
-    output: UNUSED_TOOL_OUTPUT,
-    execute: async () => [],
-    presentCall: (args: unknown) => {
-      const command = (args as { command: string }).command
-      const description = (args as { description: string }).description
-      if (callCard.card === 'terminal') {
-        return { card: 'terminal', title: command, description, ...callCard.cwd !== undefined ? { cwd: callCard.cwd } : {} }
-      }
-      return { card: 'generic', title: command, kind: 'execute', rawInput: command, content: [{ type: 'text', text: description }] }
-    },
-    presentResult: () => ({ card: 'terminal', ...resultTerminal }),
-  })
-
-  const callEvent = evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'bash', arguments: JSON.stringify({ command: 'echo hi', description: 'Greet' }) })
-  const resultEvent = evt('tool/result', { turn: 1, step: 1, callId: CallId('c1'), content: [{ type: 'text', text: 'hi\n' }], isError: false })
-  const prunedResultEvent = {
-    ...resultEvent,
-    seq: 2,
-    data: {
-      ...resultEvent.data,
-      content: [{ type: 'text', text: '[... tool result middle pruned ...]' }],
-    },
-    surfaceOp: { op: 'replace', start: 1, end: 1 },
-    sourceEventSeqs: [1],
-  } as SessionEvent
-
-  function termUpdates(tool: ToolDefinition, enabled: boolean, cwd: string | undefined, ...events: SessionEvent[]): SessionNotification['update'][] {
-    const presenter = new ToolPresenter(registryOf(tool))
-    const out: SessionNotification['update'][] = []
-    for (const event of events) streamSessionEventUpdate(SessionId('s1'), event, n => out.push(n.update), presenter, { enabled, cwd })
-    return out
-  }
-
-  it('capability ON: description content THEN terminal block; cwd from the session header when the tool gives none', () => {
-    const [call, update] = termUpdates(termTool({ card: 'terminal' }, { output: 'hi\n', exitCode: 0 }), true, '/work/proj', callEvent, resultEvent)
-    expect(call).toMatchObject({
-      sessionUpdate: 'tool_call',
-      content: [
-        { type: 'content', content: { type: 'text', text: 'Greet' } },
-        { type: 'terminal', terminalId: 'c1' },
-      ],
-      _meta: { terminal_info: { terminal_id: 'c1', cwd: '/work/proj' } },
-    })
-    // The update OMITS content (it would clobber the terminal block) and carries output + exit.
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      _meta: { terminal_output: { terminal_id: 'c1', data: 'hi\n' }, terminal_exit: { terminal_id: 'c1', exit_code: 0 } },
-    })
-  })
-
-  it('live/replay translation preserves the original terminal completion across a pruning rewrite', () => {
-    const updates = termUpdates(
-      termTool({ card: 'terminal' }, { output: 'hi\n', exitCode: 0 }),
-      true,
-      '/work/proj',
-      callEvent,
-      resultEvent,
-      prunedResultEvent,
-    )
-    expect(updates).toHaveLength(2)
-    expect(updates[1]).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      _meta: {
-        terminal_output: { terminal_id: 'c1', data: 'hi\n' },
-        terminal_exit: { terminal_id: 'c1', exit_code: 0 },
-      },
-    })
-  })
-
-  it('capability ON: an ABSOLUTE tool cwd wins; a RELATIVE one resolves against the session cwd', () => {
-    const [absCall] = termUpdates(termTool({ card: 'terminal', cwd: '/explicit/abs' }, { output: 'x' }), true, '/work/proj', callEvent)
-    expect((absCall as unknown as { _meta: { terminal_info: { cwd: string } } })._meta.terminal_info.cwd).toBe('/explicit/abs')
-    const [relCall] = termUpdates(termTool({ card: 'terminal', cwd: nativePath('sub', 'dir') }, { output: 'x' }), true, nativeAbsolute('/work/proj'), callEvent)
-    // Relative workdir resolved against the session cwd — the card header matches
-    // where execution actually ran (tool-bash resolves the same way).
-    expect((relCall as unknown as { _meta: { terminal_info: { cwd: string } } })._meta.terminal_info.cwd).toBe(nativeAbsolute('/work/proj', 'sub', 'dir'))
-    // No session cwd to resolve against → the relative tool cwd is passed through as-is.
-    const [noSessionCwd] = termUpdates(termTool({ card: 'terminal', cwd: 'rel/only' }, { output: 'x' }), true, undefined, callEvent)
-    expect((noSessionCwd as unknown as { _meta: { terminal_info: { cwd: string } } })._meta.terminal_info.cwd).toBe('rel/only')
-  })
-
-  it('capability ON: a signal kill maps to terminal_exit.signal', () => {
-    const [, update] = termUpdates(termTool({ card: 'terminal' }, { output: 'gone', signal: 'SIGKILL' }), true, '/w', callEvent, resultEvent)
-    expect((update as unknown as { _meta: { terminal_exit: unknown } })._meta.terminal_exit).toEqual({ terminal_id: 'c1', signal: 'SIGKILL' })
-  })
-
-  it('capability ON: a terminal result with output but NO exit/signal emits terminal_output and NO exit pill', () => {
-    // A terminal-rendering tool that reports no structured exit (neither exitCode
-    // nor signal) — the card shows output but no exit pill.
-    const [, update] = termUpdates(termTool({ card: 'terminal' }, { output: 'partial' }), true, '/w', callEvent, resultEvent)
-    const meta = (update as unknown as { _meta: { terminal_output?: unknown; terminal_exit?: unknown } })._meta
-    expect(meta.terminal_output).toEqual({ terminal_id: 'c1', data: 'partial' })
-    expect(meta.terminal_exit).toBeUndefined()
-  })
-
-  it('capability OFF: no terminal block or _meta; the description content and the bridge-derived fenced result render', () => {
-    const [call, update] = termUpdates(termTool({ card: 'terminal' }, { output: 'hi\n' }), false, '/work/proj', callEvent, resultEvent)
-    expect(call).toEqual({
-      sessionUpdate: 'tool_call',
-      toolCallId: 'c1',
-      title: 'echo hi',
-      kind: 'execute',
-      status: 'in_progress',
-      rawInput: 'echo hi',
-      content: [{ type: 'content', content: { type: 'text', text: 'Greet' } }],
-    })
-    // The bridge derives the fenced ```console fallback from the terminal output.
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      content: [{ type: 'content', content: { type: 'text', text: '```console\nhi\n```' } }],
-    })
-  })
-
-  it('orphan guard: a result-side terminal with a GENERIC call is dropped (no orphan terminal_output)', () => {
-    // presentCall is a generic card, but presentResult returns a terminal view —
-    // the bridge must not emit _meta.terminal_output for a terminal Zed never made.
-    const [call, update] = termUpdates(termTool({ card: 'generic' }, { output: 'hi\n', exitCode: 0 }), true, '/w', callEvent, resultEvent)
-    // The call was generic → ordinary tool_call (description content, no _meta).
-    expect((call as { _meta?: unknown })._meta).toBeUndefined()
-    expect((call as { content: unknown }).content).toEqual([{ type: 'content', content: { type: 'text', text: 'Greet' } }])
-    // The result falls back to the RAW result content (the tool/result event's text); NO terminal _meta.
-    expect((update as { _meta?: unknown })._meta).toBeUndefined()
-    expect((update as { content: unknown }).content).toEqual([{ type: 'content', content: { type: 'text', text: 'hi\n' } }])
-  })
-
-  it('capability ON: a terminal result title replaces the completed-card title; missing output emits empty data', () => {
-    // A terminal result MAY carry a replacement title and MAY omit output (a run
-    // that produced nothing) — the _meta carries empty data, not a dropped key.
-    const [, update] = termUpdates(termTool({ card: 'terminal' }, { title: 'Ran echo', exitCode: 0 }), true, '/w', callEvent, resultEvent)
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      title: 'Ran echo',
-      _meta: { terminal_output: { terminal_id: 'c1', data: '' }, terminal_exit: { terminal_id: 'c1', exit_code: 0 } },
-    })
-  })
-
-  it('capability OFF: a terminal result title rides on the fenced fallback update', () => {
-    const [, update] = termUpdates(termTool({ card: 'terminal' }, { title: 'Ran echo', output: 'hi\n' }), false, '/w', callEvent, resultEvent)
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'c1',
-      status: 'completed',
-      content: [{ type: 'content', content: { type: 'text', text: '```console\nhi\n```' } }],
-      title: 'Ran echo',
-    })
-  })
-
-  it('a terminal call with NO description and NO capability is a bare execute card (no content key)', () => {
-    // A terminal view whose presentCall omits `description`, with the capability
-    // OFF: no description block and no terminal block → the card carries no content.
-    const noDesc: ToolDefinition = {
-      name: 'bash',
-      description: 'run a command',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      presentCall: (args: unknown) => ({ card: 'terminal', title: (args as { command: string }).command }),
-    }
-    const [call] = termUpdates(noDesc, false, undefined, callEvent)
-    expect(call).toEqual({
-      sessionUpdate: 'tool_call',
-      toolCallId: 'c1',
-      title: 'echo hi',
-      kind: 'execute',
-      status: 'in_progress',
-      rawInput: 'echo hi',
-    })
-  })
-})
-
-describe('diff-card mapping', () => {
-  // A stand-in diff tool, letting us drive the bridge's diff arm across shapes
-  // the shipping fs tools don't emit (no locations, empty diffs).
-  const diffTool = (view: unknown): ToolDefinition => ({
-    name: 'writer',
-    description: 'writes a file',
-    parameters: {},
-    output: UNUSED_TOOL_OUTPUT,
-    execute: async () => [],
-    presentCall: () => view as ReturnType<NonNullable<ToolDefinition['presentCall']>>,
-  })
-  function callUpdate(tool: ToolDefinition, cwd: string | undefined): SessionNotification['update'] {
-    const presenter = new ToolPresenter(registryOf(tool))
-    const out: SessionNotification['update'][] = []
-    streamSessionEventUpdate(
-      SessionId('s1'),
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name: 'writer', arguments: '{}' }),
-      n => out.push(n.update),
-      presenter,
-      { enabled: false, cwd },
-    )
-    return out[0]!
-  }
-
-  it('a diff with NO locations relativizes the title off the first diff path; omits the locations key', () => {
-    const update = callUpdate(diffTool({ card: 'diff', title: 'Write /work/proj/a.txt', diffs: [{ path: '/work/proj/a.txt', oldText: null, newText: 'x' }] }), '/work/proj')
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call',
-      toolCallId: 'c1',
-      title: 'Write a.txt',
-      kind: 'edit',
-      status: 'in_progress',
-      content: [{ type: 'diff', path: '/work/proj/a.txt', oldText: null, newText: 'x' }],
-    })
-  })
-
-  it('a diff with an EMPTY diffs array omits the content key (no diff blocks to send)', () => {
-    const update = callUpdate(diffTool({ card: 'diff', title: 'Write nothing', diffs: [] }), undefined)
-    expect(update).toEqual({
-      sessionUpdate: 'tool_call',
-      toolCallId: 'c1',
-      title: 'Write nothing',
-      kind: 'edit',
-      status: 'in_progress',
-    })
-  })
-})
-
-describe('result-time diff card (REAL fs edit tool → tool_call_update diff blocks)', () => {
-  // Drive the SHIPPING fs edit tool through the bridge: the pending tool/call installs the
-  // call-time snippet, then the tool/result carries the tool's computed applied-hunk `meta`,
-  // which presentResult narrows into a `diff` result card the bridge forwards as `{ type:
-  // 'diff' }` content blocks. The real tool is required because its result metadata is the contract.
-  it('live/replay translation keeps the applied diff when a pruning rewrite follows', async () => {
-    const ctx = await fsCtx()
-    const presenter = new ToolPresenter(ctx.tools)
-    const args = JSON.stringify({ file_path: 'src/b.ts', old_string: 'OLD', new_string: 'NEW' })
-    // The applied hunk the tool would compute and persist on the result meta.
-    const meta = { diffs: [{ path: 'src/b.ts', oldText: 'a\nOLD\nb', newText: 'a\nNEW\nb' }] }
-    const originalResult = evt('tool/result', {
-      turn: 1,
-      step: 1,
-      callId: CallId('e1'),
-      content: [{ type: 'text', text: 'ok' }],
-      isError: false,
-      meta,
-    })
-    const replacement = {
-      ...originalResult,
-      seq: 3,
-      data: {
-        ...originalResult.data,
-        content: [{ type: 'text', text: '[... tool result middle pruned ...]' }],
-      },
-      surfaceOp: { op: 'replace', start: 2, end: 2 },
-      sourceEventSeqs: [2],
-    } as SessionEvent
-    const updates = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('e1'), name: 'edit', arguments: args }),
-      originalResult,
-      replacement,
-    )
-    expect(updates).toHaveLength(2)
-    const resultUpdate = updates[1]
-    expect(resultUpdate).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'e1',
-      status: 'completed',
-      title: 'Edit src/b.ts',
-      content: [{ type: 'diff', path: 'src/b.ts', oldText: 'a\nOLD\nb', newText: 'a\nNEW\nb' }],
-    })
-    await ctx.fiber.dispose()
-  })
-
-  it('an error result carries NO diff card (falls back to raw content)', async () => {
-    const ctx = await fsCtx()
-    const presenter = new ToolPresenter(ctx.tools)
-    const args = JSON.stringify({ file_path: 'src/b.ts', old_string: 'OLD', new_string: 'NEW' })
-    const [, resultUpdate] = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('e1'), name: 'edit', arguments: args }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('e1'), content: [{ type: 'text', text: 'Error: boom' }], isError: true }),
-    )
-    expect(resultUpdate).toMatchObject({ sessionUpdate: 'tool_call_update', status: 'failed' })
-    expect(resultUpdate).not.toHaveProperty('content', expect.arrayContaining([expect.objectContaining({ type: 'diff' })]))
-    await ctx.fiber.dispose()
-  })
-
-  it('the completed diff TITLE relativizes against the session cwd (the result title replaces the card header)', async () => {
-    // A `tool_call_update.title` replaces the card header, so the result-side diff must
-    // relativize its title exactly as the pending card did — otherwise a completed
-    // absolute-path edit flips `Edit src/b.ts` back to the raw absolute path. Diff and location
-    // paths remain absolute so the editor can open the real file.
-    const ctx = await fsCtx()
-    const presenter = new ToolPresenter(ctx.tools)
-    const workspace = nativeAbsolute('/work/proj')
-    const file = nativeAbsolute('/work/proj', 'src', 'b.ts')
-    const args = JSON.stringify({ file_path: file, old_string: 'OLD', new_string: 'NEW' })
-    const meta = { diffs: [{ path: file, oldText: 'a\nOLD\nb', newText: 'a\nNEW\nb' }] }
-    const out: SessionNotification['update'][] = []
-    const rendering = { enabled: false, cwd: workspace }
-    for (const event of [
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('e1'), name: 'edit', arguments: args }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('e1'), content: [{ type: 'text', text: 'ok' }], isError: false, meta }),
-    ]) streamSessionEventUpdate(SessionId('s1'), event, n => out.push(n.update), presenter, rendering)
-    expect(out[1]).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'e1',
-      status: 'completed',
-      title: `Edit ${nativePath('src', 'b.ts')}`,
-      content: [{ type: 'diff', path: file, oldText: 'a\nOLD\nb', newText: 'a\nNEW\nb' }],
-    })
-    await ctx.fiber.dispose()
-  })
-
-  it('a diff result with an EMPTY diffs array and no title omits both keys (nothing to send)', () => {
-    // Shipping edit always has a hunk and write falls back to a whole-file diff, so a synthetic
-    // tool is required to cover both absent-title and empty-content result branches.
-    const emptyDiffTool: ToolDefinition = {
-      name: 'writer',
-      description: 'writes a file',
-      parameters: {},
-      output: UNUSED_TOOL_OUTPUT,
-      execute: async () => [],
-      presentCall: () => ({ card: 'diff', title: 'Write x', diffs: [{ path: 'x', oldText: null, newText: 'y' }] }),
-      presentResult: () => ({ card: 'diff', diffs: [] }),
-    }
-    const presenter = new ToolPresenter(registryOf(emptyDiffTool))
-    const [, resultUpdate] = updatesWith(
-      presenter,
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('w1'), name: 'writer', arguments: '{}' }),
-      evt('tool/result', { turn: 1, step: 1, callId: CallId('w1'), content: [{ type: 'text', text: 'ok' }], isError: false }),
-    )
-    expect(resultUpdate).toEqual({
-      sessionUpdate: 'tool_call_update',
-      toolCallId: 'w1',
-      status: 'completed',
-    })
-    expect(resultUpdate).not.toHaveProperty('content')
-    expect(resultUpdate).not.toHaveProperty('title')
-  })
-})
-
-describe('relative-path display titles (bridge relativizes the title against the session cwd)', () => {
-  // The bridge relativizes a file card's TITLE against the session workspace cwd (mirroring the
-  // reference adapter's `toDisplayPath`), while leaving location/diff paths raw. Use real fs tools
-  // and the absolute paths an editor supplies; presentation itself is args-only and lacks cwd.
-  function callUpdate(ctx: Context, sessionCwd: string | undefined, name: string, args: unknown): SessionNotification['update'] {
-    const presenter = new ToolPresenter(ctx.tools)
-    const out: SessionNotification['update'][] = []
-    streamSessionEventUpdate(
-      SessionId('s1'),
-      evt('tool/call', { turn: 1, step: 1, callId: CallId('c1'), name, arguments: JSON.stringify(args) }),
-      n => out.push(n.update),
-      presenter,
-      { enabled: false, cwd: sessionCwd },
-    )
-    return out[0]!
-  }
-
-  it('read: an absolute path inside the workspace relativizes the TITLE; the location path stays absolute', async () => {
-    const ctx = await fsCtx()
-    const workspace = nativeAbsolute('/work/proj')
-    const file = nativeAbsolute('/work/proj', 'src', 'a.ts')
-    const update = callUpdate(ctx, workspace, 'read', { file_path: file, offset: 5 })
-    expect(update).toMatchObject({
-      title: `Read ${nativePath('src', 'a.ts')} (from line 5)`,
-      locations: [{ path: file, line: 5 }],
-    })
-    await ctx.fiber.dispose()
-  })
-
-  it('edit: the diff TITLE relativizes; the diff/location paths stay absolute (the editor opens the real path)', async () => {
-    const ctx = await fsCtx()
-    const workspace = nativeAbsolute('/work/proj')
-    const file = nativeAbsolute('/work/proj', 'src', 'b.ts')
-    const update = callUpdate(ctx, workspace, 'edit', { file_path: file, old_string: 'x', new_string: 'y' })
-    expect(update).toMatchObject({
-      title: `Edit ${nativePath('src', 'b.ts')}`,
-      locations: [{ path: file }],
-      content: [{ type: 'diff', path: file, oldText: 'x', newText: 'y' }],
-    })
-    await ctx.fiber.dispose()
-  })
-
-  it('a path OUTSIDE the workspace is left as-is (no `..` title)', async () => {
-    const ctx = await fsCtx()
-    const update = callUpdate(ctx, '/work/proj', 'read', { file_path: '/etc/passwd' })
-    expect((update as { title: string }).title).toBe('Read /etc/passwd')
-    await ctx.fiber.dispose()
-  })
-
-  it('an in-workspace file whose relative form starts with `..` chars (a sibling name) still relativizes', async () => {
-    // `/work/proj/..cache/x` is inside the workspace — its relative form `..cache/x` begins
-    // with the chars `..` but is not a parent segment. Segment-aware guarding must relativize it,
-    // matching targets under `cwd + sep` in the reference adapter.
-    const ctx = await fsCtx()
-    const update = callUpdate(ctx, nativeAbsolute('/work/proj'), 'read', { file_path: nativeAbsolute('/work/proj', '..cache', 'x.ts') })
-    expect((update as { title: string }).title).toBe(`Read ${nativePath('..cache', 'x.ts')}`)
-    await ctx.fiber.dispose()
-  })
-
-  it('no session cwd → the absolute title is left unchanged', async () => {
-    const ctx = await fsCtx()
-    const update = callUpdate(ctx, undefined, 'read', { file_path: '/work/proj/src/a.ts' })
-    expect((update as { title: string }).title).toBe('Read /work/proj/src/a.ts')
-    await ctx.fiber.dispose()
-  })
-
-  it('a relative path is passed through unchanged (already display-friendly)', async () => {
-    const ctx = await fsCtx()
-    const update = callUpdate(ctx, nativeAbsolute('/work/proj'), 'read', { file_path: nativePath('src', 'a.ts') })
-    expect((update as { title: string }).title).toBe(`Read ${nativePath('src', 'a.ts')}`)
-    await ctx.fiber.dispose()
-  })
-})
-
-describe('agentOptions', () => {
-  it('includes only the fields present in config', () => {
-    expect(agentOptions({})).toEqual({})
-    expect(agentOptions({ model: 'm' })).toEqual({ model: 'm' })
-    expect(agentOptions({ provider: 'p', model: 'm' })).toEqual({ provider: 'p', model: 'm' })
-  })
-})
diff --git a/packages/ui/acp/tests/turns.spec.ts b/packages/ui/acp/tests/turns.spec.ts
deleted file mode 100644
index 2535102405..0000000000
--- a/packages/ui/acp/tests/turns.spec.ts
+++ /dev/null
@@ -1,406 +0,0 @@
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
-import { mkdtemp, rm } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
-import { join } from 'node:path'
-import { defineContentToolFixture } from '@deepseek-ai/dsh-tools'
-import { PROTOCOL_VERSION } from '@agentclientprotocol/sdk'
-import {
-  errorResponse,
-  makeBridgeHarness,
-  maxTokensResponse,
-  textResponse,
-  toolCallResponse,
-  type BridgeHarness,
-} from './harness.ts'
-import { SessionId } from '@deepseek-ai/dsh-session'
-
-/** Boilerplate: initialize + create one session, returning its id. */
-async function newSession(h: BridgeHarness, clientCapabilities: Record<string, unknown> = {}): Promise<string> {
-  await h.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities })
-  const { sessionId } = await h.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-  return sessionId
-}
-
-describe('acp bridge — turn outcomes', () => {
-  let storageDir: string
-  let harness: BridgeHarness | undefined
-
-  beforeEach(async () => { storageDir = await mkdtemp(join(tmpdir(), 'acp-test-')) })
-  afterEach(async () => {
-    if (harness) await harness.dispose()
-    harness = undefined
-    await rm(storageDir, { recursive: true, force: true })
-  })
-
-  it('maps a max-tokens turn to stopReason max_tokens', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [maxTokensResponse('cut off')] })
-    const sessionId = await newSession(harness)
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(res.stopReason).toBe('max_tokens')
-  })
-
-  it('rejects the prompt RPC when a turn fails (no misleading end_turn)', async () => {
-    // ACP has no "error" stop reason; a failed turn must surface as a rejected
-    // session/prompt, not a normal end_turn that hides the failure from the
-    // client. The bridge rejects via the turn/end{error} log record.
-    harness = await makeBridgeHarness({ storageDir, script: [errorResponse('provider boom')] })
-    const sessionId = await newSession(harness)
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
-      .rejects.toThrow(/turn failed: provider boom/)
-  })
-
-  it('rejects an ordinary plugin turn failure through the same ACP boundary', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('must not run')] })
-    harness.ctx.on('agent/pre-step', () => { throw new Error('plugin pre-step failed') })
-    const sessionId = await newSession(harness)
-
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
-      .rejects.toThrow(/turn failed: plugin pre-step failed/)
-  })
-
-  it('streams a tool call as tool_call then tool_call_update', async () => {
-    harness = await makeBridgeHarness({
-      storageDir,
-      script: [toolCallResponse('c1', 'bash', { command: 'echo hi' }), textResponse('done')],
-    })
-    harness.ctx.tools.register(defineContentToolFixture({
-      name: 'bash',
-      description: 'run a command',
-      parameters: { command: { type: 'string' } },
-      async execute() { return [{ type: 'text', text: 'hi\n' }] },
-    }))
-    const sessionId = await newSession(harness)
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'run it' }] })
-
-    const toolCalls = harness.updates.filter(u => u.sessionUpdate === 'tool_call')
-    const toolUpdates = harness.updates.filter(u => u.sessionUpdate === 'tool_call_update')
-    expect(toolCalls).toHaveLength(1)
-    // The inline stand-in declares no presentCall, so the generic fallback
-    // renders kind `other` (kinds are tool-owned; the bridge never sniffs the
-    // name — the REAL dsh-tool-bash test below covers the execute card).
-    expect(toolCalls[0]).toMatchObject({ toolCallId: 'c1', title: 'bash', kind: 'other', status: 'in_progress' })
-    expect(toolUpdates).toHaveLength(1)
-    expect(toolUpdates[0]).toMatchObject({ toolCallId: 'c1', status: 'completed' })
-
-    // Ordering invariant: the tool_call precedes its tool_call_update.
-    const callIdx = harness.updates.findIndex(u => u.sessionUpdate === 'tool_call')
-    const updIdx = harness.updates.findIndex(u => u.sessionUpdate === 'tool_call_update')
-    expect(callIdx).toBeLessThan(updIdx)
-  })
-
-  it('the REAL bash tool drives the tool-call UI end-to-end: command title + description block + console output', async () => {
-    // Use the SHIPPING tool (dsh-tool-bash + dsh-bash-local), not an inline
-    // stand-in, so this verifies the actual presentCall/presentResult the editor
-    // sees (docs/testing.md "prefer the real implementation over a mock").
-    // The mock MODEL still scripts the tool call (no real LLM needed), but the
-    // tool and executor are real: a real `echo` runs and its real output flows
-    // back through the bridge.
-    harness = await makeBridgeHarness({
-      storageDir,
-      withBash: true,
-      script: [
-        toolCallResponse('c1', 'bash', { command: 'echo hello', description: 'Print a greeting' }),
-        textResponse('done'),
-      ],
-    })
-    const sessionId = await newSession(harness)
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'greet' }] })
-
-    // presentCall: execute kind, title IS the command (an execute card hides
-    // rawInput, so the command is the title), the description rides as a content
-    // text block, the command is also rawInput for non-terminal UIs.
-    const call = harness.updates.find(u => u.sessionUpdate === 'tool_call')
-    expect(call).toMatchObject({
-      toolCallId: 'c1',
-      title: 'echo hello',
-      kind: 'execute',
-      rawInput: 'echo hello',
-      status: 'in_progress',
-    })
-    if (call?.sessionUpdate !== 'tool_call') throw new Error('expected a tool_call')
-    // Capability OFF: the description renders as the only content block (no terminal block).
-    expect(call.content).toEqual([{ type: 'content', content: { type: 'text', text: 'Print a greeting' } }])
-    // presentResult: the REAL command output, wrapped in a fenced console block.
-    const update = harness.updates.find(u => u.sessionUpdate === 'tool_call_update')
-    expect(update?.sessionUpdate).toBe('tool_call_update')
-    if (update?.sessionUpdate !== 'tool_call_update') throw new Error('expected a tool_call_update')
-    expect(update).toMatchObject({ toolCallId: 'c1', status: 'completed' })
-    const content = update.content as { content: { type: string; text: string } }[]
-    expect(content[0]?.content.text).toBe('```console\nhello\n```')
-    // Capability OFF (the default newSession): NO terminal _meta on either update.
-    expect((call as { _meta?: unknown })._meta).toBeUndefined()
-    expect((update as { _meta?: unknown })._meta).toBeUndefined()
-  })
-
-  it('with the terminal_output capability ON, a real bash call renders as a TERMINAL card (content + _meta + exit)', async () => {
-    // With terminal output advertised, a real bash call emits description then terminal content
-    // plus cwd metadata; its result uses terminal output/exit metadata and omits text that would
-    // clobber the card.
-    harness = await makeBridgeHarness({
-      storageDir,
-      withBash: true,
-      script: [toolCallResponse('c1', 'bash', { command: 'echo hi', description: 'Greet' }), textResponse('done')],
-    })
-    // Capability lives under clientCapabilities._meta.terminal_output.
-    const sessionId = await newSession(harness, { _meta: { terminal_output: true } })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'greet' }] })
-
-    const call = harness.updates.find(u => u.sessionUpdate === 'tool_call')
-    if (call?.sessionUpdate !== 'tool_call') throw new Error('expected a tool_call')
-    // The description content block FIRST (renders above the card), then a
-    // terminal content block keyed by the callId; terminal_info carries the
-    // session cwd (the bridge fills it from the session header).
-    expect(call.content).toEqual([
-      { type: 'content', content: { type: 'text', text: 'Greet' } },
-      { type: 'terminal', terminalId: 'c1' },
-    ])
-    expect((call._meta as { terminal_info?: unknown }).terminal_info).toEqual({ terminal_id: 'c1', cwd: process.cwd() })
-
-    const update = harness.updates.find(u => u.sessionUpdate === 'tool_call_update')
-    if (update?.sessionUpdate !== 'tool_call_update') throw new Error('expected a tool_call_update')
-    // In terminal mode the text content is OMITTED (a tool_call_update.content
-    // REPLACES the call's content — it would clobber the terminal block).
-    expect(update.content).toBeUndefined()
-    // Output rides on _meta.terminal_output; the parsed exit on _meta.terminal_exit.
-    const meta = update._meta as {
-      terminal_output?: { terminal_id: string; data: string }
-      terminal_exit?: { terminal_id: string; exit_code?: number; signal?: string }
-    }
-    expect(meta.terminal_output).toEqual({ terminal_id: 'c1', data: 'hi\n' })
-    expect(meta.terminal_exit).toEqual({ terminal_id: 'c1', exit_code: 0 })
-  })
-
-  it('the terminal capability is snapshotted per-session: a later initialize cannot desync a call/result', async () => {
-    // Create the session with terminal support, then disable it connection-wide. The session's
-    // snapshot must keep call and result rendering consistent instead of re-reading changed state.
-    harness = await makeBridgeHarness({
-      storageDir,
-      withBash: true,
-      script: [toolCallResponse('c1', 'bash', { command: 'echo hi', description: 'Greet' }), textResponse('done')],
-    })
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: { _meta: { terminal_output: true } } })
-    const { sessionId } = await harness.client.newSession({ cwd: process.cwd(), mcpServers: [] })
-    // A re-initialize that DROPS the capability after the session exists.
-    await harness.client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} })
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'greet' }] })
-
-    const call = harness.updates.find(u => u.sessionUpdate === 'tool_call')
-    if (call?.sessionUpdate !== 'tool_call') throw new Error('expected a tool_call')
-    // Still a terminal card (the session's snapshot, not the mutated connection cap).
-    expect((call._meta as { terminal_info?: unknown }).terminal_info).toBeDefined()
-    const update = harness.updates.find(u => u.sessionUpdate === 'tool_call_update')
-    if (update?.sessionUpdate !== 'tool_call_update') throw new Error('expected a tool_call_update')
-    // The result AGREES with the call: terminal output present, content omitted.
-    expect(update.content).toBeUndefined()
-    expect((update._meta as { terminal_output?: unknown }).terminal_output).toBeDefined()
-  })
-
-  it('a throwing tool presenter does not break the turn: the bridge falls back generically', async () => {
-    // A buggy tool whose presentCall throws must not fail the live turn — the
-    // bridge's presenter contains the throw (logging via its onError sink) and
-    // falls back to the generic title=name presentation. Exercises the real
-    // bridge wiring of the per-session presenter's error sink.
-    harness = await makeBridgeHarness({
-      storageDir,
-      script: [toolCallResponse('c1', 'kaboom', { x: 1 }), textResponse('done')],
-    })
-    harness.ctx.tools.register(defineContentToolFixture({
-      name: 'kaboom',
-      description: 'explodes when presented',
-      parameters: { x: { type: 'number' } },
-      async execute() { return [{ type: 'text', text: 'ok' }] },
-      presentCall: () => { throw new Error('present boom') },
-    }))
-    const sessionId = await newSession(harness)
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(res.stopReason).toBe('end_turn') // the turn completed despite the throw
-
-    const call = harness.updates.find(u => u.sessionUpdate === 'tool_call')
-    // Generic fallback: title is the tool name, raw args as rawInput.
-    expect(call).toMatchObject({ toolCallId: 'c1', title: 'kaboom', kind: 'other', rawInput: { x: 1 } })
-    const update = harness.updates.find(u => u.sessionUpdate === 'tool_call_update')
-    expect(update).toMatchObject({ toolCallId: 'c1', status: 'completed' })
-  })
-
-  it('a failing tool yields a failed tool_call_update', async () => {
-    harness = await makeBridgeHarness({
-      storageDir,
-      script: [toolCallResponse('c1', 'bash', { command: 'boom' }), textResponse('ok')],
-    })
-    harness.ctx.tools.register(defineContentToolFixture({
-      name: 'bash',
-      description: 'run a command',
-      parameters: { command: { type: 'string' } },
-      async execute() { throw new Error('command failed') },
-    }))
-    const sessionId = await newSession(harness)
-    await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'run it' }] })
-    const failed = harness.updates.filter(u => u.sessionUpdate === 'tool_call_update' && u.status === 'failed')
-    expect(failed).toHaveLength(1)
-  })
-
-  it('settles successfully when an earlier turn/end observer throws', async () => {
-    // Session contains each post-commit observer failure, so a prepended peer
-    // cannot starve the bridge's live turn/end delivery.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('answer')] })
-    harness.ctx.on('session/event', (_s, event) => {
-      if (event.type === 'turn/end') throw new Error('peer listener boom')
-    }, { prepend: true })
-    const sessionId = await newSession(harness)
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(res.stopReason).toBe('end_turn')
-  })
-
-  it('still rejects a failed turn when an earlier turn/end observer throws', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: [errorResponse('starved boom')] })
-    harness.ctx.on('session/event', (_s, event) => {
-      if (event.type === 'turn/end') throw new Error('peer listener boom')
-    }, { prepend: true })
-    const sessionId = await newSession(harness)
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
-      .rejects.toThrow(/turn failed: starved boom/)
-  })
-
-  it('captures and settles the owning turn when an earlier turn-start observer throws', async () => {
-    // Turn correlation still reaches the bridge after the throwing peer and
-    // captures inflight.turn via the live stream. A throwing turn/start listener
-    // Session contains post-commit callbacks independently.
-    // The model request and normal turn outcome therefore still occur.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('answer')] })
-    harness.ctx.on('session/event', (_s, event) => {
-      if (event.type === 'turn/start') throw new Error('peer listener boom on start')
-    }, { prepend: true })
-    const sessionId = await newSession(harness)
-    const result = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(result.stopReason).toBe('end_turn')
-  })
-
-  it('a between-turn injection does not settle the prompt early (message-trigger correlation)', async () => {
-    // A plugin injects context (a one-shot injection-triggered turn) right after
-    // the prompt is queued but before the prompt's own message turn runs. The
-    // bridge must NOT mistake the injection turn's turn/end for the prompt's —
-    // it correlates only to message-triggered turns. The prompt settles on its
-    // OWN turn with the real model answer.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('real answer')] })
-    const sessionId = await newSession(harness)
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    // On the queued prompt, synchronously inject a one-shot context turn (idle
-    // inject writes turn/start{injection} → context/message → turn/end). Fire
-    // once so it lands between install and the prompt turn.
-    let injected = false
-    harness.ctx.on('agent/queued', (subject) => {
-      if (subject === agent && !injected) {
-        injected = true
-        agent.inject([{ type: 'text', text: 'ctx note' }], { source: { kind: 'plugin', plugin: 'test' } })
-      }
-    })
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(res.stopReason).toBe('end_turn')
-    const text = harness.updates
-      .filter(u => u.sessionUpdate === 'agent_message_chunk')
-      .map(u => (u.content.type === 'text' ? u.content.text : ''))
-      .join('')
-    expect(text).toContain('real answer')
-  })
-
-  it('rejects a second prompt while one is in flight', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    const sessionId = await newSession(harness)
-    // Start the first prompt but do NOT await — it hangs in the model stream.
-    const first = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'one' }] })
-    // Give the loop a tick to install the settle + start running.
-    await new Promise(r => setTimeout(r, 30))
-    await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'two' }] }))
-      .rejects.toThrow(/already in flight/)
-    // Cancel to settle the first so the harness disposes cleanly.
-    await harness.client.cancel({ sessionId })
-    await first
-  })
-
-  it('session/cancel aborts a running turn and settles the prompt as cancelled', async () => {
-    harness = await makeBridgeHarness({ storageDir, script: ['hang'] })
-    const sessionId = await newSession(harness)
-    const promptDone = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    await new Promise(r => setTimeout(r, 30))
-    await harness.client.cancel({ sessionId })
-    const res = await promptDone
-    expect(res.stopReason).toBe('cancelled')
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    await agent.whenIdle()
-    const turnEnd = agent.session.events.findLast(event => event.type === 'turn/end')
-    expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toEqual({ kind: 'aborted' })
-  })
-
-  it('cancel right after prompt settles cancelled and leaves the agent idle, no leaked turn', async () => {
-    // JSON-RPC timing normally makes this a running mid-step cancellation; pre-step dropping is
-    // covered in agent-loop. Here the prompt must settle cancelled, return idle, and clear queued
-    // work so the scripted second response cannot leak into another turn.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('answer'), textResponse('leaked')] })
-    const sessionId = await newSession(harness)
-    const promptDone = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    await harness.client.cancel({ sessionId })
-    const res = await promptDone
-    expect(res.stopReason).toBe('cancelled')
-    const agent = harness.ctx.agents.get(SessionId(sessionId))!
-    await agent.whenIdle()
-    const turnStarts = agent.session.events.filter(e => e.type === 'turn/start').length
-    expect(turnStarts).toBeLessThanOrEqual(1)
-  })
-
-  it('idle session/cancel then session/prompt runs the prompt (no intervening whenIdle)', async () => {
-    // The bridge settles cancel synchronously, so exercise the production cancel→prompt race with
-    // no `whenIdle()`. An idle cancel must not mark or drop the following prompt.
-    harness = await makeBridgeHarness({ storageDir, script: [textResponse('real answer')] })
-    const sessionId = await newSession(harness)
-    // Cancel while idle (no prompt in flight) — a no-op.
-    await harness.client.cancel({ sessionId })
-    // Immediately prompt, no whenIdle() between.
-    const res = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] })
-    expect(res.stopReason).toBe('end_turn')
-    const text = harness.updates
-      .filter(u => u.sessionUpdate === 'agent_message_chunk')
-      .map(u => (u.content.type === 'text' ? u.content.text : ''))
-      .join('')
-    expect(text).toContain('real answer')
-  })
-
-  it('mid-stream cancel then an IMMEDIATE next prompt runs (no intervening whenIdle)', async () => {
-    // Cancel a running turn and immediately send another prompt without awaiting quiescence. The
-    // cancellation marker belongs only to the first turn and must not drop the next request.
-    harness = await makeBridgeHarness({ storageDir, script: ['hang', textResponse('next answer')] })
-    const sessionId = await newSession(harness)
-    const a = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'A' }] })
-    await new Promise(r => setTimeout(r, 30))
-    await harness.client.cancel({ sessionId })
-    expect((await a).stopReason).toBe('cancelled')
-    // Immediately — no whenIdle() — send the next prompt.
-    const b = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'B' }] })
-    expect(b.stopReason).toBe('end_turn')
-    const text = harness.updates
-      .filter(u => u.sessionUpdate === 'agent_message_chunk')
-      .map(u => (u.content.type === 'text' ? u.content.text : ''))
-      .join('')
-    expect(text).toContain('next answer')
-  })
-
-  it('a cancelled turn\'s late turn/end does not settle the NEXT prompt', async () => {
-    // Cancellation frees A's slot before its aborted turn/end is appended. Send B in that window;
-    // correlation by turn number must prevent A's late closer from settling B as cancelled.
-    harness = await makeBridgeHarness({ storageDir, script: ['hang', textResponse('B answer')] })
-    const sessionId = await newSession(harness)
-
-    const a = harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'A' }] })
-    await new Promise(r => setTimeout(r, 30)) // let A start running (turn 1)
-    await harness.client.cancel({ sessionId })
-    expect((await a).stopReason).toBe('cancelled')
-
-    // B owns the later turn and must complete on its own turn/end.
-    const b = await harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'B' }] })
-    expect(b.stopReason).toBe('end_turn')
-    const text = harness.updates
-      .filter(u => u.sessionUpdate === 'agent_message_chunk')
-      .map(u => (u.content.type === 'text' ? u.content.text : ''))
-      .join('')
-    expect(text).toContain('B answer')
-  })
-})
diff --git a/packages/ui/acp/tsconfig.json b/packages/ui/acp/tsconfig.json
deleted file mode 100644
index 409928f136..0000000000
--- a/packages/ui/acp/tsconfig.json
+++ /dev/null
@@ -1,72 +0,0 @@
-{
-  "extends": "../../../tsconfig.base.json",
-  "compilerOptions": {
-    "rootDir": "src",
-    "outDir": "lib/types"
-  },
-  "include": [
-    "src"
-  ],
-  "references": [
-    {
-      "path": "../../../vendor/cosmokit"
-    },
-    {
-      "path": "../../../vendor/cordis"
-    },
-    {
-      "path": "../../../vendor/schemastery"
-    },
-    {
-      "path": "../../llm/llm"
-    },
-    {
-      "path": "../../llm/llm-retry"
-    },
-    {
-      "path": "../../core/session"
-    },
-    {
-      "path": "../../context/session-reference"
-    },
-    {
-      "path": "../../session-query/session-query"
-    },
-    {
-      "path": "../../session-title/session-title"
-    },
-    {
-      "path": "../../core/agent"
-    },
-    {
-      "path": "../../core/tools"
-    },
-    {
-      "path": "../commands"
-    },
-    {
-      "path": "../user-interaction"
-    },
-    {
-      "path": "../../plan/plan-mode"
-    },
-    {
-      "path": "../../session-persistence/session-persistence"
-    },
-    {
-      "path": "../user-approval"
-    },
-    {
-      "path": "../permission"
-    },
-    {
-      "path": "../../sandbox/sandbox"
-    },
-    {
-      "path": "../../bash/bash"
-    },
-    {
-      "path": "../../support/invariants"
-    }
-  ]
-}
diff --git a/packages/ui/commands/README.md b/packages/ui/commands/README.md
index 0c9eb04267..e32513a563 100644
--- a/packages/ui/commands/README.md
+++ b/packages/ui/commands/README.md
@@ -1,10 +1,10 @@
 # @deepseek-ai/dsh-commands
 
-Plugin-owned human-command registry shared by the TUI and ACP adapters. The [plugin command registration Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) owns the boundary and protocol mapping.
+Plugin-owned human-command registry consumed by interactive UI adapters. The [plugin command registration Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) owns the boundary and dispatch contract.
 
 ## Service contract
 
-`ctx.commands.register(definition)` registers one lowercase command name, description, optional ACP-compatible unstructured-input hint, and abortable handler. A registered command is available to every composed command adapter; a plugin that is incompatible with a deployment does not register there. A plain-context registration is global. A command-producing plugin mounted beneath `agent.ctx` declares its own `commands` injection and creates an exact agent-scoped definition; it shadows a global definition with the same name. This child-injection shape preserves the agent scope without making the core agent loop depend on a UI service. Duplicate names within one layer fail during registration. Every disposer is the exact Cordis effect disposer, and registration or removal notifies every `commands/change` observer so live adapters can refresh discovery; observer failures are logged and cannot veto the registry mutation or starve later observers.
+`ctx.commands.register(definition)` registers one lowercase command name, description, optional unstructured-input hint, and abortable handler. A registered command is available to every composed command adapter; a plugin that is incompatible with a deployment does not register there. A plain-context registration is global. A command-producing plugin mounted beneath `agent.ctx` declares its own `commands` injection and creates an exact agent-scoped definition; it shadows a global definition with the same name. This child-injection shape preserves the agent scope without making the core agent loop depend on a UI service. Duplicate names within one layer fail during registration. Every disposer is the exact Cordis effect disposer, and registration or removal notifies every `commands/change` observer so live adapters can refresh discovery; observer failures are logged and cannot veto the registry mutation or starve later observers.
 
 `list(agent)` returns immutable, name-sorted descriptors after scoped shadowing. `find(agent, name)` returns the corresponding definition. `execute(agent, line, signal)` uses `parseCommand()` and runs only a known command, returning `undefined` for invalid syntax or unknown names.
 
@@ -14,7 +14,7 @@ Handlers return `success` or `error` plus optional UI text. Results are rendered
 
 ## Composition
 
-The terminal and ACP app bundles mount this service with their consuming front door; the UI-less agent spine does not. Custom compositions that use `dsh-tui`, `dsh-acp`, or a command producer mount `@deepseek-ai/dsh-commands` explicitly.
+The terminal app bundle mounts this service with `dsh-tui`; the UI-less agent spine and ACP automation app do not. Custom interactive compositions and command producers mount `@deepseek-ai/dsh-commands` explicitly.
 
 ## Model Experience
 
@@ -34,6 +34,6 @@ Registry metadata, command input, and direct output never enter a model request
 
 ## Known Limitations and Deferred Work
 
-- **Only unstructured text input** — the descriptor intentionally matches ACP's current unstructured command input; forms, completion schemas, and typed arguments remain command-owned parsing concerns.
+- **Only unstructured text input** — forms, completion schemas, and typed arguments remain command-owned parsing concerns.
 - **No persisted command output** — adapters display results live, but the generic registry does not add them to the session log or reconstruct them after reconnect.
 - **Cooperative side-effect cancellation** — dispatch stops awaiting on abort; handlers must honor the signal to stop work that has already escaped into external systems.
diff --git a/packages/ui/commands/src/index.ts b/packages/ui/commands/src/index.ts
index 56f88a9f20..ba8a519e4e 100644
--- a/packages/ui/commands/src/index.ts
+++ b/packages/ui/commands/src/index.ts
@@ -12,7 +12,7 @@ export const name = 'commands'
 
 const COMMAND_NAME = /^[a-z][a-z0-9_-]*$/u
 
-/** Immutable command input metadata compatible with ACP unstructured input. */
+/** Immutable metadata for a command's optional unstructured input. */
 export interface CommandInputDescriptor {
   /** Placeholder shown before the user supplies free-form input. */
   readonly hint: string
diff --git a/packages/ui/permission/README.md b/packages/ui/permission/README.md
index 12196d89a0..67eb1c5164 100644
--- a/packages/ui/permission/README.md
+++ b/packages/ui/permission/README.md
@@ -1,10 +1,10 @@
 # @deepseek-ai/dsh-permission
 
-User-facing permission presets through `ctx.permission` ([`PermissionService`](src/index.ts)). Each configured name bundles `sandbox/mode` with `approval/policy`; the defaults are `workspace-write` (`workspace-write` + `ask`) and `danger-full-access` (`danger-full-access` + `never`). The ACP bridge exposes them as one `Permissions` select, while sandbox execution and approval continue to consume their own knobs.
+User-facing permission presets through `ctx.permission` ([`PermissionService`](src/index.ts)). Each configured name bundles `sandbox/mode` with `approval/policy`; the defaults are `workspace-write` (`workspace-write` + `ask`) and `danger-full-access` (`danger-full-access` + `never`). UI adapters may expose the table as one selector, while sandbox execution and approval continue to consume their own knobs.
 
 `set(session, name)` records a changed selection in a log-only `permission/preset` event, then calls each knob's setter only when its effective value changes. The selection event precedes the knob events and preserves user intent when presets share a bundle; a net-zero selection appends nothing. `current(events)` prefers a still-matching recorded selection, then the first matching table entry, and otherwise returns `custom`. Clients may display `custom` as the current value, but cannot select it.
 
-The service requires a confining `ctx.bash` executor and `ctx.approval`. A table entry named `custom` throws at load; composition defaults outside the table instead make a zero-event session derive `custom`. See the [acp-agent composition](../../../examples/acp-agent/) and [sandbox switching design](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md).
+The service requires a confining `ctx.bash` executor and `ctx.approval`. A table entry named `custom` throws at load; composition defaults outside the table instead make a zero-event session derive `custom`. See the [sandbox switching design](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md).
 
 ## Model Experience
 
diff --git a/packages/ui/permission/src/index.ts b/packages/ui/permission/src/index.ts
index a92f3bc221..d44dff3df4 100644
--- a/packages/ui/permission/src/index.ts
+++ b/packages/ui/permission/src/index.ts
@@ -51,7 +51,7 @@ export interface PresetSpec {
 
 /** The select-option shape a presentation layer advertises for one preset (or for the derived `custom` state). */
 export interface PresetOption {
-  /** The machine value (`session/set_config_option` vocabulary): the table key, or `custom`. */
+  /** Stable option value: the table key, or `custom`. */
   value: string
   /** The display label. */
   name: string
diff --git a/packages/ui/user-approval/README.md b/packages/ui/user-approval/README.md
index 77b368fac3..f61e56b535 100644
--- a/packages/ui/user-approval/README.md
+++ b/packages/ui/user-approval/README.md
@@ -4,11 +4,11 @@ Channel-neutral one-shot approval seam. `ctx.approval.request(req)` returns `all
 
 Each request must belong to an open agent turn. The service appends a paired `approval/asked` and `approval/decided` audit record, while the model sees only the resulting logged tool outcome. An aborted request resolves `cancelled`; an audit append that fails before commit rejects rather than returning an unlogged decision.
 
-Answerers are `approval/request` waterfall listeners. Return an outcome to answer for an owned agent or call `next()` to delegate. Agent-scoped listeners receive only that agent's requests; compose one terminal answerer per deployment because sibling listener order is not a policy priority mechanism. The ACP bridge is the shipped human answerer.
+Answerers are `approval/request` waterfall listeners. Return an outcome to answer for an owned agent or call `next()` to delegate. Agent-scoped listeners receive only that agent's requests; compose one terminal answerer per deployment because sibling listener order is not a policy priority mechanism. The ACP automation bridge supplies one-shot machine decisions for sessions it owns.
 
 `ApprovalPolicy` is `'ask'` or `'never'`. The effective value is the last `approval/policy` event, falling back to config; `setApprovalPolicy()` is the write path. `'never'` rejects before interactive dispatch and is the only policy stated in the prompt. Switches produce at most one coalesced notice, attributed to the user when the override follows the last `request/header` and to operator/config otherwise.
 
-The tools pipeline routes `ask` decisions through this seam and fails closed when it is absent; the sandboxed bash tool also uses it for escalated retries. The ACP bridge is the shipped human answerer for calls it owns. Audit events remain log-only, so the model sees only the asking consumer's result. See the [approval-seam Agent Note](../../../.agents/notes/implemented/feature/2026-07-06-approval-seam.md) and [sandbox Agent Note](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md).
+The tools pipeline routes `ask` decisions through this seam and fails closed when it is absent; the sandboxed bash tool also uses it for escalated retries. The ACP automation bridge answers calls for its own agents through the client's machine policy. Audit events remain log-only, so the model sees only the asking consumer's result. See the [approval-seam Agent Note](../../../.agents/notes/implemented/feature/2026-07-06-approval-seam.md) and [sandbox Agent Note](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md).
 
 ## Model Experience
 
@@ -57,5 +57,5 @@ Append-only; newly visible content follows the reusable request prefix and does
 
 - **Requests are valid only inside an open turn** — an idle or between-turn caller throws before auditing; a durable out-of-turn approval workflow is deferred.
 - **Only one-shot grants exist** — the outcome vocabulary has `allowed-once` but no `allow-always`, remembered rule, revocation, or grant store; session policy is only `ask` / `never`.
-- **The request carries no tool arguments** — a UI must correlate `callId` with an already rendered tool call, and a call-less request cannot be presented by the shipped ACP answerer.
+- **The request carries no tool arguments** — an answerer sees the tool name, reason, and optional call id; the ACP machine channel requires a call id and delegates requests without one.
 - **No built-in answerer** — headless or incompletely composed deployments resolve `unavailable` and fail closed; the service itself never prompts a human.
diff --git a/packages/ui/user-interaction/README.md b/packages/ui/user-interaction/README.md
index f0e14b81bd..6e74d743c2 100644
--- a/packages/ui/user-interaction/README.md
+++ b/packages/ui/user-interaction/README.md
@@ -21,7 +21,7 @@ When an answer includes `custom`, `selected` is empty; custom text is an overrid
 
 ## Role
 
-This is the interface package. Model-facing consumers such as `@deepseek-ai/dsh-tool-ask-user` depend on this seam; the interactive `dsh-tui` and structured `dsh-acp` front doors provide the provider. The loop stays unchanged: a tool call awaits a promise, and the tool result resumes the normal agent loop.
+This is the interface package. Model-facing consumers such as `@deepseek-ai/dsh-tool-ask-user` depend on this seam; `dsh-tui` and the host runtime provide interactive implementations. The loop stays unchanged: a tool call awaits a promise, and the tool result resumes the normal agent loop.
 
 ## Model Experience
 
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 6d7f049856..3f13a5e52e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -368,6 +368,46 @@ importers:
         specifier: 1.1.0
         version: 1.1.0
 
+  packages/acp/acp:
+    dependencies:
+      '@agentclientprotocol/sdk':
+        specifier: 0.25.1
+        version: 0.25.1(zod@4.4.3)
+      schemastery:
+        specifier: ^3.17.0
+        version: 3.18.0
+      zod:
+        specifier: ^4.0.0
+        version: 4.4.3
+    devDependencies:
+      '@deepseek-ai/dsh-agent':
+        specifier: workspace:^
+        version: link:../../core/agent
+      '@deepseek-ai/dsh-agent-loop':
+        specifier: workspace:^
+        version: link:../../core/agent-loop
+      '@deepseek-ai/dsh-agent-loop-testkit':
+        specifier: workspace:^
+        version: link:../../support/agent-loop-testkit
+      '@deepseek-ai/dsh-invariants':
+        specifier: workspace:^
+        version: link:../../support/invariants
+      '@deepseek-ai/dsh-llm':
+        specifier: workspace:^
+        version: link:../../llm/llm
+      '@deepseek-ai/dsh-session':
+        specifier: workspace:^
+        version: link:../../core/session
+      '@deepseek-ai/dsh-tools':
+        specifier: workspace:^
+        version: link:../../core/tools
+      '@deepseek-ai/dsh-user-approval':
+        specifier: workspace:^
+        version: link:../../ui/user-approval
+      cordis:
+        specifier: ^4.0.0-rc.7
+        version: 4.0.0-rc.7(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.5)
+
   packages/bash/bash:
     devDependencies:
       '@deepseek-ai/dsh-invariants':
@@ -1253,7 +1293,7 @@ importers:
         version: link:../../../vendor/loader
       '@deepseek-ai/dsh-acp':
         specifier: workspace:^
-        version: link:../../ui/acp
+        version: link:../../acp/acp
       '@deepseek-ai/dsh-agent':
         specifier: workspace:^
         version: link:../../core/agent
@@ -1263,12 +1303,6 @@ importers:
       '@deepseek-ai/dsh-app-boot':
         specifier: workspace:^
         version: link:../../ui/app-boot
-      '@deepseek-ai/dsh-command-goal':
-        specifier: workspace:^
-        version: link:../../goal/command-goal
-      '@deepseek-ai/dsh-commands':
-        specifier: workspace:^
-        version: link:../../ui/commands
       '@deepseek-ai/dsh-invariants':
         specifier: workspace:^
         version: link:../../support/invariants
@@ -1278,24 +1312,12 @@ importers:
       '@deepseek-ai/dsh-session-persistence-jsonl':
         specifier: workspace:^
         version: link:../../session-persistence/session-persistence-jsonl
-      '@deepseek-ai/dsh-session-query':
-        specifier: workspace:^
-        version: link:../../session-query/session-query
-      '@deepseek-ai/dsh-session-query-sqlite':
-        specifier: workspace:^
-        version: link:../../session-query/session-query-sqlite
-      '@deepseek-ai/dsh-session-reference':
-        specifier: workspace:^
-        version: link:../../context/session-reference
       '@deepseek-ai/dsh-system-prompt':
         specifier: workspace:^
         version: link:../../core/system-prompt
       '@deepseek-ai/dsh-tools':
         specifier: workspace:^
         version: link:../../core/tools
-      '@deepseek-ai/dsh-user-interaction':
-        specifier: workspace:^
-        version: link:../../ui/user-interaction
       '@deepseek-ai/dsh-workspace-context':
         specifier: workspace:^
         version: link:../../context/workspace-context
@@ -3546,106 +3568,6 @@ importers:
         specifier: ^4.0.0-rc.7
         version: 4.0.0-rc.7(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.5)
 
-  packages/ui/acp:
-    dependencies:
-      '@agentclientprotocol/sdk':
-        specifier: 0.25.1
-        version: 0.25.1(zod@4.4.3)
-      schemastery:
-        specifier: ^3.17.0
-        version: 3.18.0
-      zod:
-        specifier: ^4.0.0
-        version: 4.4.3
-    devDependencies:
-      '@deepseek-ai/dsh-agent':
-        specifier: workspace:^
-        version: link:../../core/agent
-      '@deepseek-ai/dsh-agent-loop':
-        specifier: workspace:^
-        version: link:../../core/agent-loop
-      '@deepseek-ai/dsh-agent-loop-testkit':
-        specifier: workspace:^
-        version: link:../../support/agent-loop-testkit
-      '@deepseek-ai/dsh-bash':
-        specifier: workspace:^
-        version: link:../../bash/bash
-      '@deepseek-ai/dsh-bash-local':
-        specifier: workspace:^
-        version: link:../../bash/bash-local
-      '@deepseek-ai/dsh-commands':
-        specifier: workspace:^
-        version: link:../commands
-      '@deepseek-ai/dsh-fs-local':
-        specifier: workspace:^
-        version: link:../../fs/fs-local
-      '@deepseek-ai/dsh-fs-policy':
-        specifier: workspace:^
-        version: link:../../fs/fs-policy
-      '@deepseek-ai/dsh-invariants':
-        specifier: workspace:^
-        version: link:../../support/invariants
-      '@deepseek-ai/dsh-llm':
-        specifier: workspace:^
-        version: link:../../llm/llm
-      '@deepseek-ai/dsh-llm-retry':
-        specifier: workspace:^
-        version: link:../../llm/llm-retry
-      '@deepseek-ai/dsh-permission':
-        specifier: workspace:^
-        version: link:../permission
-      '@deepseek-ai/dsh-plan-mode':
-        specifier: workspace:^
-        version: link:../../plan/plan-mode
-      '@deepseek-ai/dsh-sandbox':
-        specifier: workspace:^
-        version: link:../../sandbox/sandbox
-      '@deepseek-ai/dsh-session':
-        specifier: workspace:^
-        version: link:../../core/session
-      '@deepseek-ai/dsh-session-persistence':
-        specifier: workspace:^
-        version: link:../../session-persistence/session-persistence
-      '@deepseek-ai/dsh-session-persistence-jsonl':
-        specifier: workspace:^
-        version: link:../../session-persistence/session-persistence-jsonl
-      '@deepseek-ai/dsh-session-query':
-        specifier: workspace:^
-        version: link:../../session-query/session-query
-      '@deepseek-ai/dsh-session-reference':
-        specifier: workspace:^
-        version: link:../../context/session-reference
-      '@deepseek-ai/dsh-session-title':
-        specifier: workspace:^
-        version: link:../../session-title/session-title
-      '@deepseek-ai/dsh-system-prompt':
-        specifier: workspace:^
-        version: link:../../core/system-prompt
-      '@deepseek-ai/dsh-tool-ask-user':
-        specifier: workspace:^
-        version: link:../tool-ask-user
-      '@deepseek-ai/dsh-tool-bash':
-        specifier: workspace:^
-        version: link:../../bash/tool-bash
-      '@deepseek-ai/dsh-tool-fs':
-        specifier: workspace:^
-        version: link:../../fs/tool-fs
-      '@deepseek-ai/dsh-tool-todo':
-        specifier: workspace:^
-        version: link:../../todo/tool-todo
-      '@deepseek-ai/dsh-tools':
-        specifier: workspace:^
-        version: link:../../core/tools
-      '@deepseek-ai/dsh-user-approval':
-        specifier: workspace:^
-        version: link:../user-approval
-      '@deepseek-ai/dsh-user-interaction':
-        specifier: workspace:^
-        version: link:../user-interaction
-      cordis:
-        specifier: ^4.0.0-rc.7
-        version: 4.0.0-rc.7(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.5)
-
   packages/ui/app-boot:
     dependencies:
       js-yaml:
@@ -4243,7 +4165,7 @@ importers:
         version: link:../../vendor/timer
       '@deepseek-ai/dsh-acp':
         specifier: workspace:^
-        version: link:../../packages/ui/acp
+        version: link:../../packages/acp/acp
       '@deepseek-ai/dsh-agent':
         specifier: workspace:^
         version: link:../../packages/core/agent
diff --git a/scripts/gen-doc-graphs.ts b/scripts/gen-doc-graphs.ts
index 5cfa05bc2f..c99023339e 100644
--- a/scripts/gen-doc-graphs.ts
+++ b/scripts/gen-doc-graphs.ts
@@ -78,6 +78,7 @@ const GROUP_ORDER = [
   'session-query',
   'session-title',
   'support',
+  'acp',
   'ui',
 ]
 
@@ -129,7 +130,7 @@ const SERVICE_ROLES: ServiceRole[] = [
     title: 'Durable session persistence seam',
     mode: 'seam',
     implementations: ['session-persistence-jsonl', 'session-persistence-sqlite'],
-    consumers: ['agent-loop', 'tool-bash', 'hooks-claude', 'hooks-codex', 'acp', 'session-query', 'session-query-sqlite'],
+    consumers: ['agent-loop', 'tool-bash', 'hooks-claude', 'hooks-codex', 'session-query', 'session-query-sqlite'],
     note: 'Backends persist the same SessionEvent vocabulary; apps choose a backend at composition time.',
   },
   {
@@ -146,7 +147,7 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'session-reference',
     title: 'Cross-session snapshot preparation',
     mode: 'core',
-    consumers: ['tui', 'acp'],
+    consumers: ['tui'],
     note: 'Projects bounded current-surface conversation snapshots into durable untrusted message context; host adapters own mention syntax.',
   },
   {
@@ -170,7 +171,7 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'tools',
     title: 'Tool registry and guarded execution pipeline',
     mode: 'core',
-    consumers: ['agent-loop', 'tool-ask-user', 'tool-bash', 'tool-cordis', 'tool-fs', 'tool-pty', 'tool-skill', 'tool-subagent', 'tool-todo', 'tool-web', 'acp'],
+    consumers: ['agent-loop', 'tool-ask-user', 'tool-bash', 'tool-cordis', 'tool-fs', 'tool-pty', 'tool-skill', 'tool-subagent', 'tool-todo', 'tool-web'],
     note: 'Registers capabilities, owns Code Mode transport, and routes calls through pre-policy, monotonic guards, around dispatch, post-policy, and final-result observation.',
   },
   {
@@ -178,8 +179,8 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'user-interaction',
     title: 'Human question/answer seam',
     mode: 'seam',
-    implementations: ['tui', 'acp'],
-    consumers: ['tool-ask-user', 'tui', 'acp'],
+    implementations: ['tui'],
+    consumers: ['tool-ask-user', 'tui'],
     note: 'UI front doors provide the active human-answer provider; tool-ask-user pauses a tool call on the provider-neutral ask() promise.',
   },
   {
@@ -187,7 +188,6 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'plan-mode',
     title: 'Plan collaboration state',
     mode: 'core',
-    consumers: ['acp'],
     note: 'Folds logged plan/mode state, flushes user selections at turn boundaries, renders deployment-owned guidance, registers /plan, and keeps the plan-exit schema stable across transitions.',
   },
   {
@@ -195,8 +195,8 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'commands',
     title: 'Human command registry',
     mode: 'core',
-    consumers: ['tui', 'acp'],
-    note: 'Plugins register direct human commands; TUI and ACP consume the same effective per-agent catalog without sending invocations to the model.',
+    consumers: ['tui'],
+    note: 'Plugins register direct human commands; TUI consumes the effective per-agent catalog without sending invocations to the model.',
   },
   {
     key: 'tui',
@@ -295,7 +295,6 @@ const SERVICE_ROLES: ServiceRole[] = [
     title: 'Permission presets',
     mode: 'core',
     implementations: [],
-    consumers: ['acp'],
     note: 'User-facing preset table (`workspace-write`/`danger-full-access`) bundling the sandbox-mode and approval-policy knobs; a switch writes one `permission/preset` event through to both knob events.',
   },
   {
@@ -531,10 +530,10 @@ const APP_EXAMPLES = [
   {
     id: 'acp',
     rel: 'examples/acp-agent/composition.md',
-    title: 'ACP Agent App Composition',
+    title: 'ACP Automation App Composition',
     label: 'examples/acp-agent',
     config: 'examples/acp-agent/cordis.yml',
-    summary: 'The ACP demo exposes the same agent spine over JSON-RPC stdio, with no stdout logger and no pre-created agent; clients create sessions through the ACP bridge.',
+    summary: 'The ACP demo exposes fresh text-only agent sessions to programmatic clients over JSON-RPC stdio, with no stdout logger, human UI, or pre-created agent.',
   },
 ]
 
@@ -550,7 +549,7 @@ function renderAppExpansion(lines: string[], appNode: string, pluginName: string
   } else if (pluginName === '@deepseek-ai/dsh-cli-demo') {
     lines.push(`  ${appNode} --> ${nodeId('frontdoor', 'cli')}["one-shot driver<br/>format-pure stdout<br/>fresh top-level agent"]`)
   } else if (pluginName === '@deepseek-ai/dsh-acp-demo') {
-    lines.push(`  ${appNode} --> ${nodeId('frontdoor', 'acp')}["@deepseek-ai/dsh-acp<br/>JSON-RPC stdio bridge<br/>sessions created by client"]`)
+    lines.push(`  ${appNode} --> ${nodeId('frontdoor', 'acp')}["@deepseek-ai/dsh-acp<br/>automation-only JSON-RPC stdio<br/>fresh sessions created by client"]`)
   }
   lines.push(
     `  ${agentCore} --> ${nodeId('spine', 'llm')}["ctx.llm"]`,
@@ -1039,35 +1038,6 @@ function renderToolPipeline(): string {
   ].join('\n')
 }
 
-function renderSnapshotReplay(): string {
-  const maintenance = 'curated Mermaid sequence based on the snapshot test harness'
-  return [
-    ...generatedHeader('ACP Snapshot Replay'),
-    'This graph explains what a snapshot scenario proves: recorded real-model session logs are replayed keylessly, ACP stdout is normalized and diffed, and scenario workspaces preserve tool side effects that the UI stream alone cannot prove.',
-    '',
-    '```mermaid',
-    'sequenceDiagram',
-    '  participant Recorder as Real API recording',
-    '  participant Fixture as snapshot fixture',
-    '  participant Workspace',
-    '  participant Replay as llm-replay adapter',
-    '  participant ACP as acp-agent subprocess',
-    '  participant Expected as stdout expected output',
-    '  Recorder->>Fixture: session.jsonl + workspace inputs',
-    '  Fixture->>Workspace: seed files and hook configs',
-    '  Fixture->>Replay: recorded StreamChunk script',
-    `  Replay->>ACP: deterministic ${mermaidCode('llm/stream')} chunks`,
-    '  ACP->>Workspace: bash, fs, and hook side effects',
-    '  ACP->>Expected: normalized sessionUpdate stream',
-    '  Expected-->>ACP: diff must be empty',
-    '```',
-    '',
-    'The fs and hook snapshot matrix is valuable because it proves world state, hook decisions, and failed tool-card rendering, not just that replay returns text.',
-    '',
-    ...maintenanceFooter(maintenance),
-  ].join('\n')
-}
-
 function renderDocs(): GraphDoc[] {
   const pkgs = collectPackageGraph(root, GROUP_ORDER, 'gen-doc-graphs')
   const docs: GraphDoc[] = [
@@ -1076,7 +1046,6 @@ function renderDocs(): GraphDoc[] {
     { rel: 'docs/event-producer-consumer.md', content: renderEventRelations(pkgs) },
     { rel: 'docs/agent-lifecycle.md', content: renderLifecycle() },
     { rel: 'docs/tool-execution-pipeline.md', content: renderToolPipeline() },
-    { rel: 'packages/ui/acp/snapshot-replay.md', content: renderSnapshotReplay() },
   ]
   docs.unshift({ rel: 'docs/graph-atlas.md', content: renderIndex(docs) })
   return docs
@@ -1092,7 +1061,6 @@ function renderIndex(docs: GraphDoc[]): string {
     'docs/event-producer-consumer.md': 'event producer/consumer matrix',
     'docs/agent-lifecycle.md': 'agent turn and step lifecycle',
     'docs/tool-execution-pipeline.md': 'tool execution pipeline',
-    'packages/ui/acp/snapshot-replay.md': 'ACP snapshot replay',
   }
   const modes: Record<string, string> = {
     'docs/capability-seams.md': 'hybrid generated',
@@ -1103,7 +1071,6 @@ function renderIndex(docs: GraphDoc[]): string {
     'docs/event-producer-consumer.md': 'hybrid generated',
     'docs/agent-lifecycle.md': 'curated',
     'docs/tool-execution-pipeline.md': 'curated',
-    'packages/ui/acp/snapshot-replay.md': 'curated',
   }
   const rows = [
     '| [module dependency graph](module-graph.md) | `generated` |',
diff --git a/scripts/gen-module-graph.ts b/scripts/gen-module-graph.ts
index f2d7514d23..0d1b16588f 100644
--- a/scripts/gen-module-graph.ts
+++ b/scripts/gen-module-graph.ts
@@ -38,6 +38,7 @@ const GROUP_ORDER = [
   'session-query',
   'session-title',
   'support',
+  'acp',
   'ui',
 ]
 
diff --git a/scripts/gen-tool-catalog.ts b/scripts/gen-tool-catalog.ts
index cc85d48ba5..cebb61ae6b 100644
--- a/scripts/gen-tool-catalog.ts
+++ b/scripts/gen-tool-catalog.ts
@@ -354,7 +354,7 @@ const TOOL_PACKAGES: ToolPackage[] = [
       await ctx.plugin(ToolTodo)
     },
     note:
-      'todo_write is session-owned state; UIs render the latest todo/write event as a checklist or ACP plan.',
+      'todo_write is session-owned state; UIs render the latest todo/write event as a checklist.',
   },
   {
     pkg: '@deepseek-ai/dsh-tool-workflow',
diff --git a/tsconfig.base.json b/tsconfig.base.json
index d65dd9b05f..1c001b8814 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -74,6 +74,7 @@
         "./packages/hooks/*/src/invariant.ts",
         "./packages/session-persistence/*/src/invariant.ts",
         "./packages/session-query/*/src/invariant.ts",
+        "./packages/acp/*/src/invariant.ts",
         "./packages/sdk/*/src/invariant.ts",
         "./packages/ui/*/src/invariant.ts",
         "./packages/examples/*/src/invariant.ts",
@@ -141,6 +142,7 @@
         "./packages/session-persistence/*/src",
         "./packages/session-query/*/src",
         "./packages/session-title/*/src",
+        "./packages/acp/*/src",
         "./packages/sdk/*/src",
         "./packages/ui/*/src",
         "./packages/examples/*/src",
diff --git a/tsconfig.host.json b/tsconfig.host.json
index a13bcf35e3..db08a0632b 100644
--- a/tsconfig.host.json
+++ b/tsconfig.host.json
@@ -105,7 +105,7 @@
     { "path": "./packages/timeout/timeout-policy" },
     { "path": "./packages/support/invariants" },
     { "path": "./packages/support/agent-loop-testkit" },
-    { "path": "./packages/ui/acp" },
+    { "path": "./packages/acp/acp" },
     { "path": "./packages/examples/acp-demo" },
     { "path": "./packages/ui/app-boot" },
     { "path": "./packages/ui/jsonrpc" },