Merge branch 'worktree-simplify-snapshot-goldens' into worktree-simplify-extract-examples
This commit is contained in:
Tianyi Cui
@@ -113,7 +113,7 @@ Tool schemas are deliberately **part of the assembly**: "what the model is told
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- `steer(content)` — mid-turn injection, drained **between steps**; behaves like `send` when idle
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- `inject(content)` — in-session context (`context/message` event); the next request sees it (Claude Code attachment / system-reminder analog). An inject made while the agent is *running* joins the open turn; an inject while *idle* is wrapped in a one-shot turn (`turn/start{trigger:injection}` → `context/message` → `turn/end`) so every event stays turn-enclosed (see [the turn-enclosure invariant](rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md)).
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- `cancel(reason)` — the single public stop primitive: clears queued + steering work, aborts the in-flight step, and drops a turn about to start (the pre-step window) so a queued-but-not-started prompt never runs and cannot be batched into the cancelled turn. A UI/ACP `session/cancel` maps to it.
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- `whenIdle()` — resolves once the agent reaches quiescence after settling out of `running` (resolves immediately when already idle; awaits the loop exit when disposed). The teardown signal: `cancel()` then `await whenIdle()` guarantees the in-flight turn has fully stopped. Observes the transition without disposing the agent.
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- `whenIdle()` — resolves once the agent reaches quiescence after settling out of `running` (resolves immediately when already idle; awaits the loop exit when disposed). A non-owner's quiescence-observation hook: it lets a consumer await the current work settling **without** disposing the agent. It is NOT teardown — it does not stop queued work, unregister the agent, or detach the session; a lifecycle owner tears an agent down with `await AgentHandle.dispose()` (which stops the loop, awaits its exit, and unregisters).
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- `session`, `status`, `options`
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**TODO(sub-agents)**: `spawn`/`fork` land on `AgentLoop.create()` — fork seeds the child Session with the parent's event log, spawn starts fresh; children are ordinary `Agent` handles so `steer()` and event subscription work uniformly. Inter-agent channels beyond these primitives are deliberately deferred.
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@@ -56,7 +56,7 @@ export function apply(ctx: Context) {
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## A client-driver plugin (external protocol bridge)
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A *client driver* is a UI plugin whose "user" is another program speaking a wire protocol rather than a human at a terminal. It owns the process's stdio (so it must run with **no stdout logger** — every non-protocol byte corrupts the stream), creates/resumes agents on demand through the `dsh-agent` factory seam, translates harness events (`session/event`, `agent/*`) into outbound protocol messages, and translates inbound requests back into `agent.send()` / `agent.cancel()`. Two harness-specific contracts make it correct: resolve each request exactly once off a settle signal (the turn can end without its `agent/turn-end` event firing — fall back through the logged `turn/end` record), and on disposal reach quiescence (handle disposal aborts in-flight work then `await`s `agent.whenIdle()`), not just request it.
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A *client driver* is a UI plugin whose "user" is another program speaking a wire protocol rather than a human at a terminal. It owns the process's stdio (so it must run with **no stdout logger** — every non-protocol byte corrupts the stream), creates/resumes agents on demand through the `dsh-agent` factory seam, translates harness events (`session/event`, `agent/*`) into outbound protocol messages, and translates inbound requests back into `agent.send()` / `agent.cancel()`. Two harness-specific contracts make it correct: resolve each request exactly once off a settle signal (the turn can end without its `agent/turn-end` event firing — fall back through the logged `turn/end` record), and tear each agent down through its `AgentHandle.dispose()` (which stops the loop, `await`s its exit, and unregisters), not just `cancel()` — disposal must *reach* quiescence, not merely request it.
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`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 deferred-permission-gate note.
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@@ -77,7 +77,7 @@ export function apply(ctx: Context) {
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}
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})
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// Inbound "prompt": create/resume an agent and feed it; settle on turn end.
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// Disposal awaits quiescence: handle disposal aborts, then await agent.whenIdle().
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// Teardown reaches quiescence via AgentHandle.dispose() (stop + await exit).
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}
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```
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@@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages.
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:137`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:136`](../../packages/core/agent/src/types.ts)
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#### `agent/disposed` — emit
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@@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:143`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:142`](../../packages/core/agent/src/types.ts)
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#### `agent/error` — emit
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@@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:220`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:219`](../../packages/core/agent/src/types.ts)
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#### `agent/queued` — emit
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@@ -61,7 +61,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv
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Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:156`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:155`](../../packages/core/agent/src/types.ts)
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#### `agent/request` — waterfall
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@@ -73,7 +73,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo
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Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:189`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:188`](../../packages/core/agent/src/types.ts)
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#### `agent/status` — emit
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@@ -85,7 +85,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:150`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:149`](../../packages/core/agent/src/types.ts)
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#### `agent/steering` — emit
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@@ -97,7 +97,7 @@ Steering content was injected into a running turn.
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Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:214`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:213`](../../packages/core/agent/src/types.ts)
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#### `agent/step-end` — emit
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@@ -109,7 +109,7 @@ A step ended.
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:180`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:179`](../../packages/core/agent/src/types.ts)
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#### `agent/step-result` — waterfall
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@@ -121,7 +121,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va
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Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:195`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:194`](../../packages/core/agent/src/types.ts)
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#### `agent/step-start` — emit
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@@ -133,7 +133,7 @@ A step (one model call plus its tool dispatch) began. `step` is 1-based within t
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:175`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:174`](../../packages/core/agent/src/types.ts)
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#### `agent/stream-chunk` — emit
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@@ -145,7 +145,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed).
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Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md)
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Source: [`packages/core/agent/src/types.ts:209`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:208`](../../packages/core/agent/src/types.ts)
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#### `agent/turn-continuation` — waterfall
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@@ -157,7 +157,7 @@ Waterfall: override the turn-continuation decision. The default (computed by the
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:202`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:201`](../../packages/core/agent/src/types.ts)
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#### `agent/turn-end` — emit
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@@ -169,7 +169,7 @@ A turn ended. `reason` distinguishes a clean stop from a truncated or aborted on
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Types: [Agent](../core-data-structures/core.md) · [TurnEndReason](../core-data-structures/session.md)
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Source: [`packages/core/agent/src/types.ts:169`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:168`](../../packages/core/agent/src/types.ts)
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#### `agent/turn-start` — emit
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@@ -181,7 +181,7 @@ A turn began. `turn` is the 1-based turn number within the session.
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:163`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:162`](../../packages/core/agent/src/types.ts)
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### `llm/*`
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@@ -253,12 +253,15 @@ interface Agent {
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/**
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* Resolve once the agent has reached quiescence after settling out of
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* `running`, or immediately if it is already idle with no queued work. The
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* quiescence signal a teardown awaits: a lifecycle owner disposes the agent
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* through its `AgentHandle` (which aborts in-flight work then awaits this), so
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* the caller proceeds only after queued/running work has fully stopped (a
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* closing ACP connection, a disposing UI plugin) rather than returning while
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* the driver is still streaming or about to start a queued turn.
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* `running`, or immediately if it is already idle with no queued work. A
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* non-owner's quiescence-observation hook: a consumer that does NOT own the
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* agent's lifecycle awaits this to proceed only after queued/running work has
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* fully stopped, rather than returning while the driver is still streaming or
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* about to start a queued turn — without itself tearing the agent down. (A
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* lifecycle OWNER does not need it: `AgentHandle.dispose()` already awaits the
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* loop-exit promise directly as part of stopping and unregistering. So this is
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* for a non-owning observer — e.g. a test awaiting a turn to settle, or a
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* monitor — that wants the settle signal but must not dispose the agent.)
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*
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* "Quiescence", not merely "status changed": a disposed agent emits
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* `agent/status('disposed')` from inside its disposer, BEFORE the driver loop
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@@ -266,10 +269,6 @@ interface Agent {
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* to actually exit (the implementation chains the loop-exit promise), not just
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* observe the status flip. A mid-step disposal that never reaches `idle` still
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* unblocks the await this way.
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*
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* Distinct from disposal: `whenIdle()` observes the transition WITHOUT tearing
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* the agent down. A consumer that owns the agent's lifecycle disposes it
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* separately.
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*/
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whenIdle(): Promise<void>
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@@ -16,7 +16,7 @@ The extra surface area made the loop carry a public verb that is mostly a teardo
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Keep `cancel()` as 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 abort controller, but it is not part of the plugin-facing `Agent` contract.
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`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, and it has live consumers (the ACP bridge's settle points).
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`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.
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Delete public `abort()`, the tests that exercise it as standalone API, and the docs that describe step-only abort as an embedding feature. Empty-queue abort tests migrate to `cancel(reason)` where they still prove cancellation behavior; tests whose subject is the loop's internal `AbortController` behavior drive that controller directly via an in-package typed cast to the private field; tests that only pin the removed no-arg `abort()` default go away with the method. The disposer remains async and still waits for the loop to stop.
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@@ -70,7 +70,7 @@ The replay plugin lives in its own package, `@deepseek-ai/dsh-llm-replay` (`pack
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### Two subcommands, replay in the default gate
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`pnpm run test:snapshot` runs replay (keyless) and is composed into the default `pnpm run test` gate so every PR gets the regression check (the main `vitest.config.ts` include stays narrow; the gate is `test && test:snapshot`). `pnpm run test:snapshot:record` requires `DEEPSEEK_API_KEY` (loaded from repo `.env` first), hits the real API, harvests the produced `session.jsonl` (the replay source AND the expected-log artifact), and `--update`s the stdout golden in one pass. Both forward a scenario filter. A missing fixture in replay **fails loud** with a "record first" message rather than self-skipping (the e2e self-skip rule is a CI-secret accommodation, not appropriate here — a committed-fixture test that silently vanishes is a coverage hole). A no-model scenario's `session.jsonl` simply has no `assistant/chunk` events (empty derived script); fail-loud still applies if a model call happens with no entry. An orphan-fixture guard test fails on a golden/fixture not referenced by any scenario (Vitest does not prune orphaned raw goldens), and a per-kind required-fixture guard asserts each scenario ships exactly the files its kind needs (`input.json` + `stdout.golden.jsonl` for all; `session.jsonl` for model scenarios; `replay.override.json` additionally for authored ones).
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`pnpm run test:snapshot` runs replay (keyless) and is composed into the default `pnpm run test` gate so every PR gets the regression check (the main `vitest.config.ts` include stays narrow; the gate is `test && test:snapshot`). `pnpm run test:snapshot:record` requires `DEEPSEEK_API_KEY` (loaded from repo `.env` first), hits the real API, harvests the produced `session.jsonl` (the replay source AND the expected-log artifact), and `--update`s the stdout golden in one pass. Both forward a scenario filter. A missing fixture in replay **fails loud** with a "record first" message rather than self-skipping (the e2e self-skip rule is a CI-secret accommodation, not appropriate here — a committed-fixture test that silently vanishes is a coverage hole). A no-model scenario's `session.jsonl` simply has no `assistant/chunk` events (empty derived script); fail-loud still applies if a model call happens with no entry. An orphan-fixture guard test fails on a golden/fixture not referenced by any scenario (Vitest does not prune orphaned raw goldens), and a per-kind required-fixture guard asserts each scenario ships exactly the files its kind needs (`input.json` + `stdout.golden.jsonl` + `session.jsonl` for ALL scenarios — the harness passes `<dir>/session.jsonl` to `llm-replay` unconditionally, so even a no-model scenario needs its header-only fixture or `loadReplayScript()` fails; `replay.override.json` additionally for authored model scenarios).
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## Consequences
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@@ -37,7 +37,7 @@ The mapping between ACP and existing harness seams — each row names the seam a
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The permission gate is the first real consumer of the `tools/execute` veto seam (the documented "single veto/sandbox/permission seam" plus the deferred "Permission system" TODO in [docs/architecture.md](../../../architecture.md)). It is a single global listener registered with `prepend: true` so it runs before any other tool wrapper. `ToolExecution.agent` is optional and the `Agent` interface carries no origin marker, so the bridge tracks ownership itself: it records each agent it creates in a `WeakMap<Agent, sessionId>` and the gate no-ops (calls `next()` immediately) for any `exec.agent` it does not own — non-ACP agents and the no-agent case pass straight through. For an owned agent it resolves the session, issues `session/request_permission`, and stores the pending resolver on that session's record so the outcome — or a `session/cancel`/connection-close — settles it exactly once.
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Lifecycle and disposal: the connection, listeners, and in-flight permission promises register via `ctx.effect`/`ctx.on`; teardown is async and awaits quiescence — close the connection, settle/reject pending permissions, `agent.cancel()`, and wait for the agent to settle. The disposal-settle signal must come from the `dsh-agent` interface, not the loop: `agent.done` exists only on the concrete `ReactLoopAgent`, so the bridge instead observes `agent/status` reaching `idle`/`disposed` (or the RFC lifts a quiescence promise onto the `Agent` interface). Every listener contains its `send()` exceptions (log, never reject the turn) because stream chunks are emitted inside the model step, so a throwing listener would corrupt the turn.
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Lifecycle and disposal: the connection, listeners, and in-flight permission promises register via `ctx.effect`/`ctx.on`; teardown is async and must *reach* quiescence, not just request it — close the connection, settle/reject pending permissions, and dispose each owned agent through its `AgentHandle.dispose()` (which stops the loop, `await`s its exit, and unregisters). Owner teardown goes through that handle seam, not the loop's concrete `agent.done` (which exists only on `ReactLoopAgent`); a non-owner that merely wants to *observe* the current work settling without tearing the agent down awaits the interface-level `agent.whenIdle()`. Every listener contains its `send()` exceptions (log, never reject the turn) because stream chunks are emitted inside the model step, so a throwing listener would corrupt the turn.
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**Dependency note (architecture rule).** [docs/architecture.md](../../../architecture.md) states "plugins depend on interface packages, never on `dsh-agent-loop`." Creating and resuming agents is currently only on the concrete `AgentLoop` (`ctx.agentLoop`), so this RFC proposes adding an **abstract create/resume factory** to the `dsh-agent` interface (registry-level `create({ sessionId, meta })` / `resume(...)`), implemented by the loop, so `dsh-acp` injects only `agents` (the interface) and the dependency rule holds. The alternative — injecting the concrete `agentLoop` and recording a documented exception in the architecture doc — is explicitly the non-preferred fallback.
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@@ -67,7 +67,7 @@ New third-party runtime dependency plus protocol drift: `@agentclientprotocol/sd
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Turn-settle and prompt-correlation hazards: honor "queued messages batch into one turn" and "`send()` does not synchronously flip to running" (see `stdio-chat.ts` and the defensive-patterns section of [docs/architecture.md](../../../architecture.md)); gate resolution on an observed running→idle transition and handle the empty-prompt / no-work branch so an RPC can't hang.
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Permission-await and disposal hangs: a pending `request_permission` whose connection closes or whose turn aborts must settle exactly once; disposal must reach quiescence (observe the interface-level settle signal — `agent/status` reaching `idle`/`disposed`, since `agent.done` is `ReactLoopAgent`-only), not orphan awaits on a closed pipe.
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Permission-await and disposal hangs: a pending `request_permission` whose connection closes or whose turn aborts must settle exactly once; disposal must reach quiescence — tear each owned agent down through `AgentHandle.dispose()` (which stops the loop and awaits its exit), rather than orphaning awaits on a closed pipe.
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The 100% per-file coverage gate (repo policy) makes a branch-heavy protocol bridge real work. Accepted deliberately, surfaced so it isn't a surprise at PR time.
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|
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|
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@@ -228,8 +228,10 @@ export class ReactLoopAgent implements Agent {
|
||||
* internal waiter (see {@link idleWaiters}) released on the next
|
||||
* running→idle/disposed transition, resolving on `idle` directly (the turn
|
||||
* fully ended) or chaining {@link done} on `disposed` (wait for the loop to
|
||||
* actually exit). Implements the {@link Agent.whenIdle} contract used by
|
||||
* teardown (handle disposal aborts in-flight work, then awaits `whenIdle()`).
|
||||
* actually exit). Implements the {@link Agent.whenIdle} contract: a non-owner
|
||||
* quiescence-observation hook, distinct from teardown (a lifecycle owner stops
|
||||
* and unregisters via `AgentHandle.dispose()`, which awaits {@link done}
|
||||
* directly, not through this).
|
||||
*/
|
||||
whenIdle(): Promise<void> {
|
||||
if (this._status === 'disposed') return this.done
|
||||
|
||||
@@ -57,7 +57,7 @@ The handle every plugin programs against:
|
||||
- `agent.steer(content, options?)` — steer a running turn (inject between steps); behaves like `send` when idle
|
||||
- `agent.inject(content, options?)` — inject in-session context (context/message event); the next request sees it. Does not run the model. While a turn is open it joins that turn; while idle it is wrapped in a one-shot `injection` turn so every event stays turn-enclosed ([the turn-enclosure invariant](../../../docs/rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md))
|
||||
- `agent.cancel(reason?)` — cancel ALL pending work: clears the queued + steering FIFOs, aborts the in-flight step, and drops a turn about to start (the pre-step window) so a queued-but-not-started prompt never runs. A UI/ACP `session/cancel` maps to this. The single public stop primitive. Idle with nothing pending → a safe no-op.
|
||||
- `agent.whenIdle()` — resolve once the agent reaches quiescence after settling out of `running` (idle → immediately; disposed → awaits the loop exit), the signal a teardown awaits (a lifecycle owner disposes the handle, which aborts in-flight work then awaits this). Observes the transition without disposing the agent.
|
||||
- `agent.whenIdle()` — resolve once the agent reaches quiescence after settling out of `running` (idle → immediately; disposed → awaits the loop exit). A non-owner's quiescence-observation hook: it observes the work settling WITHOUT tearing the agent down. Teardown is separate — a lifecycle owner stops and unregisters via `AgentHandle.dispose()`, which awaits the loop exit directly.
|
||||
- `agent.session`, `agent.status`, `agent.options`, `agent.id`
|
||||
|
||||
### Extension points
|
||||
|
||||
@@ -99,12 +99,15 @@ export interface Agent {
|
||||
|
||||
/**
|
||||
* Resolve once the agent has reached quiescence after settling out of
|
||||
* `running`, or immediately if it is already idle with no queued work. The
|
||||
* quiescence signal a teardown awaits: a lifecycle owner disposes the agent
|
||||
* through its `AgentHandle` (which aborts in-flight work then awaits this), so
|
||||
* the caller proceeds only after queued/running work has fully stopped (a
|
||||
* closing ACP connection, a disposing UI plugin) rather than returning while
|
||||
* the driver is still streaming or about to start a queued turn.
|
||||
* `running`, or immediately if it is already idle with no queued work. A
|
||||
* non-owner's quiescence-observation hook: a consumer that does NOT own the
|
||||
* agent's lifecycle awaits this to proceed only after queued/running work has
|
||||
* fully stopped, rather than returning while the driver is still streaming or
|
||||
* about to start a queued turn — without itself tearing the agent down. (A
|
||||
* lifecycle OWNER does not need it: `AgentHandle.dispose()` already awaits the
|
||||
* loop-exit promise directly as part of stopping and unregistering. So this is
|
||||
* for a non-owning observer — e.g. a test awaiting a turn to settle, or a
|
||||
* monitor — that wants the settle signal but must not dispose the agent.)
|
||||
*
|
||||
* "Quiescence", not merely "status changed": a disposed agent emits
|
||||
* `agent/status('disposed')` from inside its disposer, BEFORE the driver loop
|
||||
@@ -112,10 +115,6 @@ export interface Agent {
|
||||
* to actually exit (the implementation chains the loop-exit promise), not just
|
||||
* observe the status flip. A mid-step disposal that never reaches `idle` still
|
||||
* unblocks the await this way.
|
||||
*
|
||||
* Distinct from disposal: `whenIdle()` observes the transition WITHOUT tearing
|
||||
* the agent down. A consumer that owns the agent's lifecycle disposes it
|
||||
* separately.
|
||||
*/
|
||||
whenIdle(): Promise<void>
|
||||
|
||||
|
||||
Reference in New Issue
Block a user