diff --git a/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.i18n.yaml
index 257bc0b3db..005a2c7cf8 100644
--- a/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.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 .agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.md
-2026-07-28-identified-immutable-message-values.md: a6cca5c3104cdb300aa076001ee7622007b2be3d
-2026-07-28-identified-immutable-message-values.zh.md: a48a20ecee129d67ace3dcae2f5da59c1c1f4e61
+2026-07-28-identified-immutable-message-values.md: 472de8b133ba323c3e1ff5e53c8dacb3d66525c5
+2026-07-28-identified-immutable-message-values.zh.md: af3624c97a2f40faa92dab245cbcafe8d7b6463f
diff --git a/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.md b/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.md
index a6cca5c310..472de8b133 100644
--- a/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.md
+++ b/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.md
@@ -38,7 +38,7 @@ Any operation that changes only the representation of an existing semantic messa
 
 Every message producer must choose creation or import explicitly, and tests construct complete values rather than partial content/source records. UUID generation moves outward to the first semantic creation point, so deterministic fixtures that provide an existing id use `freezeMessage()` instead of `createMessage()`.
 
-Live inbox events, durable events, derived history, and model requests can correlate one message without content equality or envelope-specific ids. Claim policy and UI attachment cleanup can compare `MessageId` before a turn exists. Deep freezing prevents a producer, hook, or observer from changing the value after identity is established.
+Live inbox events, durable events, derived history, and model requests can correlate one message without content equality or envelope-specific ids. Pending-input policy and UI attachment cleanup can compare `MessageId` before a turn exists, while claims retain that identity inside the open turn. Deep freezing prevents a producer, hook, or observer from changing the value after identity is established.
 
 The shared representation removes the old `UserMessageData`/`AgentMessage` split and folds provider provenance into typed message sources. Event envelopes still own facts that are not message semantics, such as turn and step position, token usage, internal tool failure identity, and presentation metadata.
 
diff --git a/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.zh.md b/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.zh.md
index a48a20ecee..af3624c97a 100644
--- a/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-28-identified-immutable-message-values.zh.md
@@ -38,7 +38,7 @@ harness 曾存在多种形似消息的表示，各自采用不同的标识规则
 
 每个消息生产方都必须显式选择创建或导入，测试也会构造完整值，而不是不完整的内容／来源记录。UUID 的生成会前移至最初的语义创建点，因此提供已有 id 的确定性 fixture 会使用 `freezeMessage()`，而不是 `createMessage()`。
 
-实时 inbox 事件、持久事件、派生历史和模型请求可以关联同一条消息，无需比较内容或使用封装专用 id。领取策略和 UI 附件清理可以在轮次存在之前比较 `MessageId`。深度冻结可以防止生产方、钩子或观察方在标识建立后更改消息值。
+实时 inbox 事件、持久事件、派生历史和模型请求可以关联同一条消息，无需比较内容或使用封装专用 id。待处理输入策略和 UI 附件清理可以在轮次存在之前比较 `MessageId`，领取后则会在已打开的轮次内保留该标识。深度冻结可以防止生产方、钩子或观察方在标识建立后更改消息值。
 
 共享表示移除了旧的 `UserMessageData`/`AgentMessage` 划分，并将提供方溯源信息纳入带类型的消息来源。事件封装仍持有不属于消息语义的事实，例如轮次与步骤位置、token 用量、内部工具失败标识和呈现元数据。
 
diff --git a/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.i18n.yaml
index a42807f507..cb4a14f421 100644
--- a/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.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 .agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md
-2026-07-31-claimed-pre-step-inbox-lifecycle.md: 06bc875722d9dfea118934e9e025b4ef60b54e65
-2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md: a2f61aaf5cd971dd4b7a210532db495ca70a8a14
+2026-07-31-claimed-pre-step-inbox-lifecycle.md: 06a806375b5f4fe67271ebab842e9e27d5e4824d
+2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md: ad6da9285a5a9f6882b887f2c4e62903ae2b0f09
diff --git a/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md b/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md
index 06bc875722..06a806375b 100644
--- a/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md
+++ b/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.md
@@ -12,9 +12,9 @@ Occurrence-local inbox wrappers also duplicated the identity already carried by
 
 ## Decision
 
-Before every proposed step, `Inbox.claim(target)` atomically removes the complete batch: all `next-step` messages and, at a turn boundary, one `next-turn` message. Claiming records normalized `agent/inbox/spliced` pure deletions with no outcome. The loop then emits `agent/inbox/claimed { message, turn }` once per claimed message and awaits the single `agent/pre-step` waterfall with that exclusive batch and `{ turn, step, signal }`.
+Before every proposed step, `Inbox.claim(target)` atomically removes the complete batch: all `next-step` messages and, at a turn boundary, one `next-turn` message. At the initial boundary the loop first commits `turn/start`, so the claim and its single `agent/pre-step` decision have durable turn ownership. Claiming records normalized `agent/inbox/spliced` pure deletions with no outcome. The loop then emits `agent/inbox/claimed { message, turn }` once per claimed message and awaits the waterfall with that exclusive batch and `{ turn, step, signal }`.
 
-`PreStepDecision` is `{ kind: 'reject' } | { kind: 'enter'; messages: UserMessage[] }`. Reject opens no turn or step and leaves the claimed batch removed. Enter supplies the complete batch appended as `user/message` events after `step/start`. A listener wrapping `next()` preserves downstream changes unless it intentionally replaces them, so all message rewrites settle once in the final return value. There is no `agent/prompt-prepare`, `agent/prompt-submit`, or `agent/step` seam.
+`PreStepDecision` is `{ kind: 'reject' } | { kind: 'enter'; messages: UserMessage[] }`. Reject opens no step, leaves the claimed batch removed, and closes the turn as blocked with `step: 0`. Empty entry, cancellation, and failure before `step/start` likewise close a balanced no-step turn. Enter supplies the complete batch appended as `user/message` events after `step/start`. A listener wrapping `next()` preserves downstream changes unless it intentionally replaces them, so all message rewrites settle once in the final return value. There is no `agent/prompt-prepare`, `agent/prompt-submit`, or `agent/step` seam.
 
 The durable inbox remains two `UserMessage[]` lists addressed by `MessageId`. `append`, `prepend`, and `splice` take a target, while `replace(messageId, newMessage)` and `remove(messageId)` locate the pending message across both lists before committing a normalized splice. Replacement may change identity and emits the old message as discarded followed by the new message as inserted. Every insertion emits `agent/inbox/inserted { message }`; an ordinary removal records `outcome: 'canceled'` and emits `agent/inbox/discarded { message }`. These live events add no placement, outcome, or batch fields.
 
@@ -34,7 +34,7 @@ The archived [addressable queue occurrence decision](../../archived/feature/2026
 
 ## Verification
 
-Agent-loop coverage pins claim-before-pre-step ordering, exact live event payloads, rejection before any turn, final-batch rewriting, input inserted after a claim, listener failure, and cancellation. Inbox and consumer tests pin pure claim deletions, canceled ordinary removals, workspace-context delayed insertion and replacement, plan/goal/hook behavior, UI cleanup, compaction, checkpointing, and resumed durable projection. Generated event and type catalogs expose only the new seam and payloads.
+Agent-loop coverage pins turn-start-before-claim-before-pre-step ordering, exact live event payloads, balanced no-step rejection, final-batch rewriting, input inserted after a claim, listener failure, and cancellation. Inbox and consumer tests pin pure claim deletions, canceled ordinary removals, workspace-context delayed insertion and replacement, plan/goal/hook behavior, UI cleanup, compaction, checkpointing, and resumed durable projection. Generated event and type catalogs expose only the new seam and payloads.
 
 ## Consequences
 
diff --git a/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md b/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md
index a2f61aaf5c..ad6da9285a 100644
--- a/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md
+++ b/.agents/notes/implemented/architecture/2026-07-31-claimed-pre-step-inbox-lifecycle.zh.md
@@ -12,9 +12,9 @@ Status: implemented
 
 ## 决策
 
-每个拟议步骤之前，`Inbox.claim(target)` 会原子移除完整批次：全部 `next-step` 消息，以及轮次边界上的一条 `next-turn` 消息。领取会记录规范化、不带 outcome 的纯删除 `agent/inbox/spliced`。随后，循环针对每条已领取消息发出一次 `agent/inbox/claimed { message, turn }`，并用该独占批次与 `{ turn, step, signal }` 等待唯一的 `agent/pre-step` waterfall（瀑布式事件）。
+每个拟议步骤之前，`Inbox.claim(target)` 会原子移除完整批次：全部 `next-step` 消息，以及轮次边界上的一条 `next-turn` 消息。在首次边界，循环会先提交 `turn/start`，使领取及其唯一一次 `agent/pre-step` 决策拥有持久轮次归属。领取会记录规范化、不带 outcome 的纯删除 `agent/inbox/spliced`。随后，循环针对每条已领取消息发出一次 `agent/inbox/claimed { message, turn }`，并用该独占批次与 `{ turn, step, signal }` 等待 waterfall（瀑布式事件）。
 
-`PreStepDecision` 为 `{ kind: 'reject' } | { kind: 'enter'; messages: UserMessage[] }`。reject 不会打开轮次或步骤，并让已领取批次保持已删除。enter 提供在 `step/start` 后以 `user/message` 追加的完整批次。包装 `next()` 的监听器会保留下游变更，除非有意替换，因此全部消息改写只在最终返回值中一次性结算。系统不再存在 `agent/prompt-prepare`、`agent/prompt-submit` 或 `agent/step` seam。
+`PreStepDecision` 为 `{ kind: 'reject' } | { kind: 'enter'; messages: UserMessage[] }`。reject 不会打开步骤，会让已领取批次保持已删除，并以 `step: 0` 将轮次关闭为 blocked。空的 enter、取消以及 `step/start` 前的失败同样会关闭一个边界平衡的无步骤轮次。enter 提供在 `step/start` 后以 `user/message` 追加的完整批次。包装 `next()` 的监听器会保留下游变更，除非有意替换，因此全部消息改写只在最终返回值中一次性结算。系统不再存在 `agent/prompt-prepare`、`agent/prompt-submit` 或 `agent/step` seam。
 
 持久 inbox 仍是两份通过 `MessageId` 寻址的 `UserMessage[]` 列表。`append`、`prepend` 与 `splice` 接受 target；`replace(messageId, newMessage)` 与 `remove(messageId)` 则在提交规范化 splice 前，通过 `MessageId` 跨两份列表定位待处理消息。替换可以改变标识，并先将旧消息作为 discarded 发布，再将新消息作为 inserted 发布。每次插入发出 `agent/inbox/inserted { message }`；普通删除记录 `outcome: 'canceled'` 并发出 `agent/inbox/discarded { message }`。这些实时事件不增加 placement、outcome 或批次字段。
 
@@ -34,7 +34,7 @@ Status: implemented
 
 ## 验证
 
-Agent-loop 覆盖固定先领取再 pre-step 的顺序、实时事件的确切载荷、打开任何轮次前的 reject、最终批次改写、领取后插入的输入、监听器失败与取消。Inbox 和消费方测试固定纯领取删除、普通删除的 canceled 结果、workspace-context 的延后插入与替换、plan/goal/hook 行为、UI 清理、压缩、检查点以及恢复后的持久投影。生成的事件与类型目录只公开新的 seam 与载荷。
+Agent-loop 覆盖固定先 `turn/start`、再领取、后 pre-step 的顺序、实时事件的确切载荷、边界平衡的无步骤 reject、最终批次改写、领取后插入的输入、监听器失败与取消。Inbox 和消费方测试固定纯领取删除、普通删除的 canceled 结果、workspace-context 的延后插入与替换、plan/goal/hook 行为、UI 清理、压缩、检查点以及恢复后的持久投影。生成的事件与类型目录只公开新的 seam 与载荷。
 
 ## 后果
 
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml
index 5790831410..f578fc9b10 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.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 .agents/notes/implemented/feature/2026-06-30-hook-bridges.md
-2026-06-30-hook-bridges.md: 39164c8462391baab1e92a54d80cfbc2963f3157
-2026-06-30-hook-bridges.zh.md: 5565b04b3985dea11133387904dd2fb1ba35103d
+2026-06-30-hook-bridges.md: a31116818c57e18d04e656f371efd1101a63b6af
+2026-06-30-hook-bridges.zh.md: d071186eeb503b262c52886bf88a1c05022e0a44
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 39164c8462..a31116818c 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.md
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.md
@@ -37,7 +37,7 @@ The CC bridge's `ask` result is a real permission path, not a terminal bridge de
 
 Every bridge `inject()` and additional-context input explicitly passes `{ kind: 'plugin', plugin: 'hooks-claude' | 'hooks-codex' }`. Unit coverage pins the resulting `user/message.source` as the plugin rather than the user.
 
-`UserPromptSubmit` runs at pre-step. For an initial follow-up it executes before any turn opens and therefore writes no turn-scoped `hook/invoked` / `hook/result` pair: rejection leaves the claimed input removed with no transcript, while entered additional context is durably represented by its sourced `user/message`. The Codex payload still receives the candidate next `turn_id`; rejection does not consume that number.
+`UserPromptSubmit` runs at pre-step after `turn/start`, so every invocation writes its turn-scoped `hook/invoked` / `hook/result` pair. Rejection leaves the claimed input removed, closes the turn as blocked with no step, and retains the hook pair as its durable decision evidence. The Codex payload receives that open turn's `turn_id`.
 
 ### Adding context is not a veto — delegate, then prepend
 
diff --git a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md
index 5565b04b39..d071186eeb 100644
--- a/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md
+++ b/.agents/notes/implemented/feature/2026-06-30-hook-bridges.zh.md
@@ -37,7 +37,7 @@ CC 桥接的 `ask` 结果是一条真正的权限路径，而非终态桥接决
 
 每个桥接的 `inject()` 和 additional-context 输入都显式传入 `{ kind: 'plugin', plugin: 'hooks-claude' | 'hooks-codex' }`。单元测试覆盖率固定验证结果中的 `user/message.source` 为插件而非用户。
 
-`UserPromptSubmit` 在 pre-step 运行。对于初始 follow-up，它发生在任何轮次开启前，因此不会写入轮次范围的 `hook/invoked` / `hook/result` 对：reject 让已领取输入保持删除且不留下 transcript（文本记录），而进入步骤的额外上下文由其带来源的 `user/message` 持久呈现。Codex payload 仍会收到候选的下一个 `turn_id`；reject 不会消耗该编号。
+`UserPromptSubmit` 在 `turn/start` 之后的 pre-step 运行，因此每次调用都会写入轮次范围的 `hook/invoked` / `hook/result` 对。reject 会让已领取输入保持删除，将轮次关闭为 blocked 且不包含步骤，并保留该 hook 对作为持久决策证据。Codex payload 会收到这个已打开轮次的 `turn_id`。
 
 ### 添加上下文不是否决——先 delegate，再 prepend
 
diff --git a/.agents/notes/implemented/feature/2026-06-30-interception-seams.i18n.yaml b/.agents/notes/implemented/feature/2026-06-30-interception-seams.i18n.yaml
index cf475337bd..a863e0d616 100644
--- a/.agents/notes/implemented/feature/2026-06-30-interception-seams.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-06-30-interception-seams.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 .agents/notes/implemented/feature/2026-06-30-interception-seams.md
-2026-06-30-interception-seams.md: 07d4ca28030ac5ba8a8c9325851fc34c3072e786
-2026-06-30-interception-seams.zh.md: b71bccdb684c34fb55b11c1b7b0eca7892b23155
+2026-06-30-interception-seams.md: 629a1aed509bd9bce9a2da89ce84b17a1db8e6b6
+2026-06-30-interception-seams.zh.md: de282894fb0854153d9cf6ffd7bd2eb4f67bfde7
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 07d4ca2803..629a1aed50 100644
--- a/.agents/notes/implemented/feature/2026-06-30-interception-seams.md
+++ b/.agents/notes/implemented/feature/2026-06-30-interception-seams.md
@@ -35,7 +35,7 @@ Core dispatch and the tool body sit inside normalization boundaries, so tool, li
 
 ### Three load-bearing loop decisions
 
-1. **Run pre-step policy at every proposed step.** The initial decision runs before the loop opens its turn, so rejection creates no turn or durable message. A tool continuation with no newly claimed input still submits an empty batch, allowing per-request context producers to add logged messages to that exact request. On enter, the loop opens the step and appends the returned batch as `user/message` events before request derivation. Each claimed follow-up remains the sole direct prompt in its turn under the [one-send-one-turn simplification](../simplification/2026-07-17-one-send-one-turn.md).
+1. **Run pre-step policy at every proposed step.** The loop opens the turn before the initial claim and decision, so rejection closes a durable blocked turn with no step or model-visible message. A tool continuation with no newly claimed input still submits an empty batch, allowing per-request context producers to add logged messages to that exact request. On enter, the loop opens the step and appends the returned batch as `user/message` events before request derivation. Each claimed follow-up remains the sole direct prompt in its turn under the [one-send-one-turn simplification](../simplification/2026-07-17-one-send-one-turn.md).
 
 2. **Post-tool `additionalContexts` and asynchronous injections enter the active-batch FIFO and append when that batch settles.** `content`/`feedback` shape the result `execute()` returns, but each context is a separate sourced `user/message`, and a single step or composite tool can produce many. Appending context immediately would interleave `result(c1) → context → result(c2)` or place nested context before its outer result, breaking tool-call/result adjacency. `ToolRunContext.deferContext()` therefore collects nested-dispatch context through failures, `execute()` surfaces the ordered array on `ToolExecutionResult`, and the loop accepts it into the same FIFO as `agent.inject()` calls made during execution. The FIFO appends after every recorded result when the batch settles, including before an interrupted turn closes. An accepted outer call preserves deferred contexts before decision contexts; an outer block discards deferred contexts and exposes only contexts explicitly supplied by the blocking decision.
 
@@ -56,4 +56,4 @@ The seam package does **not** declare `hook/*` session events (the durable hook-
 
 ## Consequences
 
-The canonical interception surface is uniformly typed without giving every extension the same power: hooks return decisions, execution wrappers wrap, terminal guards only deny, and final observers only observe. The loop owns session-start, pre-step claim settlement, post-tool context buffering, and stopping; `dsh-tools` owns identity sealing and the five-phase execution pipeline. Their contracts are documented in [architecture.md](../../../../docs/architecture.md), package READMEs, [core interception decisions](../../../../docs/core-data-structures/core.md#interception-decisions), and [tool structures](../../../../docs/core-data-structures/tools.md). The ACP bridge settles an initial pre-step rejection as `cancelled` after the agent becomes idle with no owned turn, while hook-driven snapshots verify the observable bridge behavior end to end.
+The canonical interception surface is uniformly typed without giving every extension the same power: hooks return decisions, execution wrappers wrap, terminal guards only deny, and final observers only observe. The loop owns session-start, pre-step claim settlement, post-tool context buffering, and stopping; `dsh-tools` owns identity sealing and the five-phase execution pipeline. Their contracts are documented in [architecture.md](../../../../docs/architecture.md), package READMEs, [core interception decisions](../../../../docs/core-data-structures/core.md#interception-decisions), and [tool structures](../../../../docs/core-data-structures/tools.md). The ACP bridge settles an initial pre-step rejection from its blocked no-step turn as `end_turn`, while hook-driven snapshots verify the observable bridge behavior end to end.
diff --git a/.agents/notes/implemented/feature/2026-06-30-interception-seams.zh.md b/.agents/notes/implemented/feature/2026-06-30-interception-seams.zh.md
index b71bccdb68..de282894fb 100644
--- a/.agents/notes/implemented/feature/2026-06-30-interception-seams.zh.md
+++ b/.agents/notes/implemented/feature/2026-06-30-interception-seams.zh.md
@@ -35,7 +35,7 @@ harness 需要一套钩子子系统：用户像 Claude Code（CC）和 Codex 那
 
 ### 三个承重的循环决策
 
-1. **在每个拟议步骤运行 pre-step 策略。** 首次决策发生在循环开启轮次之前，因此 reject 不会创建轮次，也不产生持久消息。即使工具续步没有新取得所有权的输入，也会提交空批次，使逐请求上下文生产方可以把带日志的消息加入这一次请求。enter 时，循环先开启步骤，再把返回批次作为 `user/message` 追加，然后派生请求。依照[一次 send 对应一个轮次的简化](../simplification/2026-07-17-one-send-one-turn.md)，每个已领取 follow-up 仍是其轮次中唯一的直接提示词。
+1. **在每个拟议步骤运行 pre-step 策略。** 循环会在首次领取和决策之前打开轮次，因此 reject 会关闭一个持久、blocked 且不含步骤或模型可见消息的轮次。即使工具续步没有新取得所有权的输入，也会提交空批次，使逐请求上下文生产方可以把带日志的消息加入这一次请求。enter 时，循环先开启步骤，再把返回批次作为 `user/message` 追加，然后派生请求。依照[一次 send 对应一个轮次的简化](../simplification/2026-07-17-one-send-one-turn.md)，每个已领取 follow-up 仍是其轮次中唯一的直接提示词。
 
 2. **工具执行后的 `additionalContexts` 与异步注入进入活跃批次 FIFO，并在该批次结算时追加。** `content`/`feedback` 塑造 `execute()` 返回的结果，但每项上下文都是一条独立的带来源 `user/message`，而单个步骤或组合工具可以产生许多上下文。立即追加上下文会产生 `result(c1) → context → result(c2)` 的交错，或把嵌套上下文放在外层结果之前，破坏工具调用/结果邻接性。因此 `ToolRunContext.deferContext()` 会在失败路径上也收集嵌套调度上下文，`execute()` 在 `ToolExecutionResult` 上暴露有序数组，循环再把它接纳到与执行期间 `agent.inject()` 调用相同的 FIFO 中。FIFO 在批次结算时，于每个已记录结果之后追加，其中也包括被中断轮次关闭之前。被接受的外层调用将 deferred contexts 保留在 decision contexts 之前；被外层阻止时则丢弃 deferred contexts，只暴露阻止 decision 显式提供的上下文。
 
@@ -56,4 +56,4 @@ seam 包**不**声明 `hook/*` 会话事件（持久的钩子调用日志）；
 
 ## 后果
 
-规范拦截表面具有统一的类型化，同时不给每个扩展相同的权力：钩子返回 decision，执行包装层做包装，终结 guard 只能拒绝，最终观测者只能观测。循环负责 session-start、pre-step 领取结算、工具执行后上下文缓冲和 stopping；`dsh-tools` 负责身份封存与五阶段执行流水线。它们的契约记录在 [architecture.md](../../../../docs/architecture.md)、各包 README、[核心拦截 decision](../../../../docs/core-data-structures/core.md#interception-decisions) 与[工具结构](../../../../docs/core-data-structures/tools.md)中。ACP 桥接在 agent 空闲且不再拥有轮次后，将初始 pre-step reject 结算为 `cancelled`，而钩子驱动的快照端到端验证可观测的桥接行为。
+规范拦截表面具有统一的类型化，同时不给每个扩展相同的权力：钩子返回 decision，执行包装层做包装，终结 guard 只能拒绝，最终观测者只能观测。循环负责 session-start、pre-step 领取结算、工具执行后上下文缓冲和 stopping；`dsh-tools` 负责身份封存与五阶段执行流水线。它们的契约记录在 [architecture.md](../../../../docs/architecture.md)、各包 README、[核心拦截 decision](../../../../docs/core-data-structures/core.md#interception-decisions) 与[工具结构](../../../../docs/core-data-structures/tools.md)中。ACP 桥接会把 blocked 无步骤轮次中的首次 pre-step reject 结算为 `end_turn`，而钩子驱动的快照端到端验证可观测的桥接行为。
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 a356b2b21f..5797cfc747 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
@@ -1,6 +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
-2026-07-16-harness-level-loop.md: 0cebbcc305b1532d28aeffd6824edd870d42aec6
-2026-07-16-harness-level-loop.zh.md: 911a5990b72e63f6a840b544648f94cadf0d1345
+#   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-07-16-harness-level-loop.md
+2026-07-16-harness-level-loop.md: 36a567204ee1082d48126369ee0b7277c9f24ca8
+2026-07-16-harness-level-loop.zh.md: 4839a031bff6b5969d23359fe46daeb5064964ef
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 0cebbcc305..36a567204e 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
@@ -60,7 +60,7 @@ Forked sessions inherit the durable goal prefix because that is the natural repl
 
 The goal-round driver owns at most one pending reservation per exact live agent. It admits a reservation only when the goal is active and armed, the agent is idle, no competing human work exists, the latest mutation has passed its durability checkpoint, the exact goal id/revision/round still matches, and downstream pre-step policy accepts it. Its `agent/pre-step` fence checks those facts both before and after downstream listeners, preventing an edit, pause, human message, or unload race from admitting obsolete work.
 
-Only an admitted positive-round goal-sourced `user/message` charges a round. A stale reservation is rejected before a turn opens without consuming the cap. A concurrent goal revision wins over settlement from an older round.
+Only an admitted positive-round goal-sourced `user/message` charges a round. A stale reservation closes a blocked no-step turn without consuming the cap. A concurrent goal revision wins over settlement from an older round.
 
 Normal turn completion schedules another round only while the goal remains active, armed, and below its cap. Cancellation pauses. Rate limiting or quota exhaustion blocks with code `usage-limited`; cap exhaustion blocks with `round-limit`; queue failure uses `queue-failed`; turn errors, max-token stops, policy rejection, and unknown terminal results use their corresponding blocker codes. An independently composed request-recovery plugin may retry transient provider failures within that same turn; the goal driver never invents another round after an abnormal terminal outcome. A human can later authorize resume through ordinary language or `/goal resume`.
 
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 911a5990b7..4839a031bf 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
@@ -60,7 +60,7 @@ fork 会话会继承持久目标前缀，因为这是自然的重放结果。for
 
 Goal Round 驱动器为每个准确实时 agent 至多拥有一个待定预留。只有 goal 处于活跃且已激活状态、agent 空闲、不存在竞争性人类工作、最新变更已经通过持久性检查点、准确 goal id／revision／Round 仍匹配，并且下游 pre-step 策略接受时，它才会接纳预留。其 `agent/pre-step` 围栏会在下游监听器前后检查这些事实，防止编辑、暂停、人类消息或卸载竞争接纳陈旧工作。
 
-只有已准入、Round 为正数且来源为 goal 的 `user/message` 会计入一个 Round。陈旧预留会在轮次打开前被拒绝，不会消耗上限。并发 goal revision 会胜过旧 Round 的结算。
+只有已准入、Round 为正数且来源为 goal 的 `user/message` 会计入一个 Round。陈旧预留会关闭一个 blocked 的无步骤轮次，不会消耗上限。并发 goal revision 会胜过旧 Round 的结算。
 
 普通 Turn 完成后，只有目标仍活跃、已激活且低于上限时才会安排另一个 Round。取消会暂停。速率限制或配额耗尽以代码 `usage-limited` 阻塞；上限耗尽使用 `round-limit`；队列失败使用 `queue-failed`；Turn 错误、max-token 停止、策略拒绝与未知终止结果使用各自对应的阻塞代码。独立组合的请求恢复插件可以在同一个 Turn 内重试暂时性 provider 失败；目标驱动器绝不会在异常终止结果后凭空发起另一个 Round。人类随后可以通过普通语言或 `/goal resume` 授权恢复。
 
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 3271beac42..e8b93f7d34 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
@@ -1,6 +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
-2026-07-19-same-session-goal-round-driver.md: adca7ab2b33f9742fe341a4b6f5cf1517f29374b
-2026-07-19-same-session-goal-round-driver.zh.md: 10fa9180d4b75c39691d621a59d971a05d7cf380
+#   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.md
+2026-07-19-same-session-goal-round-driver.md: 29f804ff9de5e69eb8af3063af1bed023fef1146
+2026-07-19-same-session-goal-round-driver.zh.md: bcee71e28c61dfd43b1b2b797503554b3397bd73
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 adca7ab2b3..29f804ff9d 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
@@ -24,7 +24,7 @@ When an agent is idle, has no competing queued work, and its current goal is `ac
 
 The `agent/pre-step` waterfall is the entry fence. A positive goal source enters only when it exactly matches the driver's pending identity and content, the live goal still has that id and revision, activation remains armed, and the round is still the next number. The plugin checks once before delegating and again after downstream listeners return. This second check prevents an async listener from editing or pausing the goal while still entering the old prompt.
 
-Only the resulting `user/message` is an entered round and advances the goal fold. A stale reservation is rejected before a turn opens; the driver marks it stale and does not charge the round. A downstream policy rejection that is not caused by staleness blocks the goal rather than retrying around policy.
+Only the resulting `user/message` is an entered round and advances the goal fold. A stale reservation closes a blocked no-step turn; the driver marks it stale and does not charge the round. A downstream policy rejection that is not caused by staleness blocks the goal rather than retrying around policy.
 
 ### Human work and revision races
 
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 10fa9180d4..bcee71e28c 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
@@ -24,7 +24,7 @@ Status: implemented
 
 `agent/pre-step` 瀑布是进入栅栏。正数目标来源只有在完全匹配驱动器待处理的身份和内容、实时目标仍具有相同 id 与修订号、激活态仍为 armed，并且该回合仍是下一个编号时才会进入步骤。插件在委托下游监听器前检查一次，在下游返回后再检查一次。第二次检查防止异步监听器编辑或暂停目标后，旧提示词仍进入步骤。
 
-只有最终产生的 `user/message` 才是进入步骤的目标回合，并推进目标折叠。陈旧预留会在轮次打开前被 reject；驱动器会把它标记为陈旧，不消耗回合数。若下游策略拒绝并非由陈旧状态导致，目标会进入 blocked，而不会绕过该策略自动重试。
+只有最终产生的 `user/message` 才是进入步骤的目标回合，并推进目标折叠。陈旧预留会关闭一个 blocked 的无步骤轮次；驱动器会把它标记为陈旧，不消耗回合数。若下游策略拒绝并非由陈旧状态导致，目标会进入 blocked，而不会绕过该策略自动重试。
 
 ### 人类工作与修订竞争
 
diff --git a/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.i18n.yaml b/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.i18n.yaml
index 92f6455753..20d19acc02 100644
--- a/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.i18n.yaml
+++ b/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.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 .agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md
-2026-07-17-one-send-one-turn.md: 6d2e9f57caf73754ea8c8d9e711126de2e7c885c
-2026-07-17-one-send-one-turn.zh.md: 1d2e74bbcf9478020cf0dfcf7ebdbb2349a86022
+2026-07-17-one-send-one-turn.md: 834eb2b3aace0a0aa5f86f483e7b7d7aabbe467e
+2026-07-17-one-send-one-turn.zh.md: aff3164d58dde238863a60fbcdbab6dab2d09961
diff --git a/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md b/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md
index 6d2e9f57ca..834eb2b3aa 100644
--- a/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md
+++ b/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md
@@ -20,7 +20,7 @@ Before inserting a message, `send()` checks the agent state and accepts an alrea
 
 If messages A and B are both processed, B's turn starts only after A records `turn/end` and A's durability checkpoint settles. B's request therefore sees whatever closed result A left in the same session log. A checkpoint error is reported, but settlement only releases this ordering barrier; it does not make a failed write durable. Broad `cancel()`, disposal, or a failure before `turn/start` can instead discard an unstarted item without opening an empty turn.
 
-At a turn boundary, the loop claims one follow-up after pending next-step input. `agent/pre-step` either rejects the proposal or returns the complete entering batch. A rejected follow-up remains removed without opening a turn or writing session history. Mixed ordinary follow-up branches do not exist.
+At a turn boundary, the loop opens the turn and claims one follow-up after pending next-step input. `agent/pre-step` either rejects the proposal or returns the complete entering batch. A rejected follow-up remains removed and closes a blocked no-step turn without writing model-visible history. Mixed ordinary follow-up branches do not exist.
 
 The no-batching rule applies only to ordinary follow-up input. `steer()` puts input in the next-step inbox and wakes the driver. During a turn, the loop can claim it at a later step boundary; while idle, the waking next-step batch starts a new turn. Input arriving after a batch was claimed waits for a later boundary, while cancellation or disposal can discard it.
 
@@ -35,7 +35,7 @@ The no-batching rule applies only to ordinary follow-up input. `steer()` puts in
 - Unit and property tests submit sends from the same stack, neighboring microtasks, different producers, and reentrant callbacks; every message gets its own FIFO-ordered turn.
 - A built-stdio test submits two lines and observes two model requests and two turn boundaries.
 - Delayed and rejected first-turn checkpoints keep the next turn waiting and prove that its request sees the preceding assistant result.
-- Failure-path tests cover pre-step rejection, listener failure, broad cancellation, disposal, and failure before `turn/start`; rejection creates no turn, recorded turns stay balanced, messages do not merge, and surviving later work still drains.
+- Failure-path tests cover pre-step rejection, listener failure, broad cancellation, disposal, and failure before `turn/start`; initial pre-step exits close balanced no-step turns, messages do not merge, and surviving later work still drains.
 - Separate tests cover open-turn, failed-turn, and idle `steer()`, pending `inject()`, whole-agent status, and `whenIdle()`.
 
 ## Consequences
diff --git a/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.zh.md b/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.zh.md
index 1d2e74bbcf..aff3164d58 100644
--- a/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.zh.md
+++ b/.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.zh.md
@@ -20,7 +20,7 @@ Status: implemented
 
 如果消息 A、B 都进入处理，B 的轮次只能在 A 记录 `turn/end` 且 A 的持久性检查点处理结束后开始。因此，B 的请求能看到 A 在同一会话日志中留下的已关闭结果。检查点错误会照常报告，但处理结束只表示解除这道顺序屏障，不表示失败的写入已经持久化。广义 `cancel()`、dispose（资源释放）或 `turn/start` 之前的失败也可能丢弃尚未启动的队列项，而不打开一个空轮次。
 
-轮次边界上，循环会在待处理 next-step 输入之后领取一条 follow-up。`agent/pre-step` 要么拒绝提案，要么返回进入步骤的完整批次。被拒绝的 follow-up 保持已删除，不打开轮次，也不写入会话历史。实现中不存在混合普通 follow-up 分支。
+轮次边界上，循环会先打开轮次，再在待处理 next-step 输入之后领取一条 follow-up。`agent/pre-step` 要么拒绝提案，要么返回进入步骤的完整批次。被拒绝的 follow-up 保持已删除，并关闭一个 blocked 的无步骤轮次，不写入模型可见历史。实现中不存在混合普通 follow-up 分支。
 
 上述不合批规则只适用于普通 follow-up 输入。`steer()` 会把输入放入 next-step inbox 并唤醒驱动器。在轮次期间，循环可以在后续步骤边界领取它；agent 空闲时，这个会唤醒的 next-step 批次会启动一个新轮次。批次被领取后才到达的输入会等待后续边界，而取消或 dispose 可以将其丢弃。
 
@@ -35,7 +35,7 @@ Status: implemented
 - 单元测试和性质测试从同一调用栈、相邻微任务、不同生产方和重入回调提交 send；每条消息都会得到一个按 FIFO 排序的独立轮次。
 - stdio 构建产物测试提交两行输入，并观察到两个模型请求和两个轮次边界。
 - 延迟和拒绝第一个轮次的检查点，都能让下一个轮次保持等待，并证明其请求可以看到前一条助手结果。
-- 失败路径测试覆盖 pre-step reject、监听器失败、广义取消、dispose 和 `turn/start` 之前的失败；reject 不会创建轮次，已记录的轮次保持边界平衡，消息不会合并，之后仍需处理的工作也能继续清空。
+- 失败路径测试覆盖 pre-step reject、监听器失败、广义取消、dispose 和 `turn/start` 之前的失败；首次 pre-step 的各种退出都会关闭边界平衡的无步骤轮次，消息不会合并，之后仍需处理的工作也能继续清空。
 - 其他测试分别覆盖轮次打开时、轮次失败后和空闲时的 `steer()`，以及待处理的 `inject()`、面向整个 agent 的状态和 `whenIdle()`。
 
 ## 后果
diff --git a/docs/architecture.i18n.yaml b/docs/architecture.i18n.yaml
index d4ff37a9fb..5576af22a5 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 docs/architecture.md
-architecture.md: 760e70414d962ea8dae64b50132c4b89a5fb18ba
-architecture.zh.md: 5efe2c4ff61eccaf764e1c4f291ea6388945c57d
+architecture.md: 401dc4e0a1875488fa3107e9f50a6a25c0e8aa89
+architecture.zh.md: ee666e593e2c38c4ede4f64254de0755cc95290e
diff --git a/docs/architecture.md b/docs/architecture.md
index 760e70414d..401dc4e0a1 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -79,14 +79,14 @@ choose declarative identity and fresh/resume path
   -> enable driving -> agent/session-start(source) -> start driver
 forever:
   wait for waking inbox work
+  -> emit agent/status(running) if starting an interval
+  -> 'turn/start'
   claim next-step input plus one next-turn message
   -> emit agent/inbox/claimed({ message, turn }) for each claimed message
-  -> emit agent/status(running) if starting an interval
   -> agent/pre-step(messages, { turn, step, signal })
-    reject or listener failure -> the claimed batch stays removed; stop the driver
-    enter:
-      'turn/start'
-    step loop:
+    reject, empty input, cancellation, or listener failure
+      -> the claimed batch stays removed; close the no-step turn; stop the driver
+    enter -> step loop:
       'step/start'
       append the returned batch as separate 'user/message' events
       assemble ordered prompt and tool schemas -> snapshot derived messages
@@ -122,7 +122,7 @@ Adapter selection, dispatch, and iteration failures become terminal error or abo
 
 Other failures use `agent/error`; cancellation and disposal beat recovery. Before request-header commit, the turn signal cancels capability preparation; undispatched tools get synthetic `tool/call`/`ABORTED_BEFORE_DISPATCH` pairs. Effective `cancel(cause)` reports its cause before clearing and aborting; idle calls emit nothing. Durability distinguishes `aborted` cancellation from `disposed` teardown, which awaits quiescence ([decision](../.agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.md)).
 
-Turn and step events are turn-enclosed; the loop appends `user/message` events only from entered batches inside a turn. Standalone `compact/* { turn: null }` events consume no turn, and their lock-time markers may interleave with inbox splices. Reload synthesizes interrupted turn ends; `session/end-seed` distinguishes stale compaction orphans from live locks. After close, only `agent/error` reports failures. Each turn has one [TurnEndReason](core-data-structures/session.md#why-a-turn-ended-turnendreasonmap).
+Turn and step events are turn-enclosed; the loop appends `user/message` events only from entered batches inside a turn. A turn opens before the initial claim and pre-step, so rejection, empty input, cancellation, or failure closes a durable turn with `step: 0`. Standalone `compact/* { turn: null }` events consume no turn, and their lock-time markers may interleave with inbox splices. Reload synthesizes interrupted turn ends; `session/end-seed` distinguishes stale compaction orphans from live locks. After close, only `agent/error` reports failures. Each turn has one [TurnEndReason](core-data-structures/session.md#why-a-turn-ended-turnendreasonmap).
 
 ### Agent Handles
 
diff --git a/docs/architecture.zh.md b/docs/architecture.zh.md
index 5efe2c4ff6..ee666e593e 100644
--- a/docs/architecture.zh.md
+++ b/docs/architecture.zh.md
@@ -79,14 +79,14 @@ choose declarative identity and fresh/resume path
   -> enable driving -> agent/session-start(source) -> start driver
 forever:
   wait for waking inbox work
+  -> emit agent/status(running) if starting an interval
+  -> 'turn/start'
   claim next-step input plus one next-turn message
   -> emit agent/inbox/claimed({ message, turn }) for each claimed message
-  -> emit agent/status(running) if starting an interval
   -> agent/pre-step(messages, { turn, step, signal })
-    reject or listener failure -> the claimed batch stays removed; stop the driver
-    enter:
-      'turn/start'
-    step loop:
+    reject, empty input, cancellation, or listener failure
+      -> the claimed batch stays removed; close the no-step turn; stop the driver
+    enter -> step loop:
       'step/start'
       append the returned batch as separate 'user/message' events
       assemble ordered prompt and tool schemas -> snapshot derived messages
@@ -122,7 +122,7 @@ idle inject:
 
 其他故障使用 `agent/error`；取消和资源释放优先于恢复。在提交请求头之前，轮次信号会取消功能准备；尚未分派的工具会得到合成的 `tool/call`/`ABORTED_BEFORE_DISPATCH` 对。实际生效的 `cancel(cause)` 会在清空队列和中止前报告原因；空闲调用不发事件。持久化层以 `aborted` 区分取消，以 `disposed` 区分会等待完全停稳的拆卸（[决策](../.agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.md)）。
 
-轮次和步骤事件均位于轮次边界内；loop 只会在轮次内从进入步骤的批次追加 `user/message`。独立的 `compact/* { turn: null }` 事件不占用轮次，其锁定时刻标记可以与 inbox splice 交错。重新加载会为中断的轮次合成结束事件；`session/end-seed` 区分陈旧的压缩遗留项与活跃锁。关闭后仅由 `agent/error` 报告故障。每个轮次有一个 [TurnEndReason](core-data-structures/session.md#why-a-turn-ended-turnendreasonmap)。
+轮次和步骤事件均位于轮次边界内；loop 只会在轮次内从进入步骤的批次追加 `user/message`。轮次会在首次领取与 pre-step 之前打开，因此拒绝、空输入、取消或失败会以 `step: 0` 关闭一个持久轮次。独立的 `compact/* { turn: null }` 事件不占用轮次，其锁定时刻标记可以与 inbox splice 交错。重新加载会为中断的轮次合成结束事件；`session/end-seed` 区分陈旧的压缩遗留项与活跃锁。关闭后仅由 `agent/error` 报告故障。每个轮次有一个 [TurnEndReason](core-data-structures/session.md#why-a-turn-ended-turnendreasonmap)。
 
 ### Agent 句柄
 
diff --git a/docs/cordis-catalog/events.md b/docs/cordis-catalog/events.md
index cbcd923036..e3c2202369 100644
--- a/docs/cordis-catalog/events.md
+++ b/docs/cordis-catalog/events.md
@@ -75,18 +75,17 @@ A step or turn errored. The machine reports a failure here even when the error h
 
 Types: [Agent](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md)
 
-Source: [`packages/core/agent/src/types.ts:303`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:302`](../../packages/core/agent/src/types.ts)
 
 ### `agent/inbox/claimed` — emit
 
-One message left the inbox for a turn. If the turn boundary that claimed it is rejected, the claimed message ends here: it is neither discarded nor re-emitted as a user/message, and a later batch may reuse the same turn number.
+One message left the inbox inside its open turn. If the proposed step is rejected, the claimed message ends here: it is neither discarded nor re-emitted as a user/message, and the turn closes without a step.
 
 ```ts cordis-catalog
 /**
- * One message left the inbox for a turn. If the turn boundary that
- * claimed it is rejected, the claimed message ends here: it is neither
- * discarded nor re-emitted as a user/message, and a later batch may
- * reuse the same turn number.
+ * One message left the inbox inside its open turn. If the proposed step
+ * is rejected, the claimed message ends here: it is neither discarded nor
+ * re-emitted as a user/message, and the turn closes without a step.
  * @param agent - the agent whose inbox changed.
  * @param event - the claimed message and owning turn.
  * Scope-filtered dispatch (`@deepseek-ai/dsh-scope`): agent-scoped listeners receive only that agent.
@@ -97,7 +96,7 @@ One message left the inbox for a turn. If the turn boundary that claimed it is r
 
 Types: [Agent](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md) · [UserMessage](../core-data-structures/session.md)
 
-Source: [`packages/core/agent/src/types.ts:216`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:215`](../../packages/core/agent/src/types.ts)
 
 ### `agent/inbox/discarded` — emit
 
@@ -116,7 +115,7 @@ One message was discarded from the live inbox.
 
 Types: [Agent](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md) · [UserMessage](../core-data-structures/session.md)
 
-Source: [`packages/core/agent/src/types.ts:224`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:223`](../../packages/core/agent/src/types.ts)
 
 ### `agent/inbox/inserted` — emit
 
@@ -156,7 +155,7 @@ Reject a proposed step or replace the messages that enter it. Calling `next()` p
 
 Types: [Agent](../core-data-structures/core.md) · [PreStepContext](../core-data-structures/core.md) · [PreStepDecision](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md) · [UserMessage](../core-data-structures/session.md)
 
-Source: [`packages/core/agent/src/types.ts:248`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:247`](../../packages/core/agent/src/types.ts)
 
 ### `agent/request` — waterfall
 
@@ -180,7 +179,7 @@ Replace the frozen call configuration. `await next()` yields the config the mach
 
 Types: [Agent](../core-data-structures/core.md) · [LlmCallConfig](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md)
 
-Source: [`packages/core/agent/src/types.ts:261`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:260`](../../packages/core/agent/src/types.ts)
 
 ### `agent/request-error` — waterfall
 
@@ -203,7 +202,7 @@ Handle one failed model-request attempt before the loop retries or closes its st
 
 Types: [Agent](../core-data-structures/core.md) · [RequestErrorAction](../core-data-structures/core.md) · [RequestFailureContext](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md)
 
-Source: [`packages/core/agent/src/types.ts:273`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:272`](../../packages/core/agent/src/types.ts)
 
 ### `agent/session-start` — emit
 
@@ -225,7 +224,7 @@ The session lifecycle began, once before the first turn. Use `agent.inject()` to
 
 Types: [Agent](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md) · [SessionStartSource](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:236`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:235`](../../packages/core/agent/src/types.ts)
 
 ### `agent/status` — emit
 
@@ -275,7 +274,7 @@ The turn is about to close: the model owes no response (no live tool calls, no f
 
 Types: [Agent](../core-data-structures/core.md) · [Scoped](../core-data-structures/scope.md)
 
-Source: [`packages/core/agent/src/types.ts:291`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:290`](../../packages/core/agent/src/types.ts)
 
 ## `agent-loop/*`
 
diff --git a/docs/core-data-structures/core.i18n.yaml b/docs/core-data-structures/core.i18n.yaml
index 94cfcbb57a..f1e116ea49 100644
--- a/docs/core-data-structures/core.i18n.yaml
+++ b/docs/core-data-structures/core.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 docs/core-data-structures/core.md
-core.md: f289fa88de42b578b5bb533f339ce1faa0caeb36
-core.zh.md: 004b87e430c39abcf398239b4d0e52c02b9365e6
+core.md: d31d07556d9cb7fd47d9dd5bd5617821bcb10482
+core.zh.md: d1773fd8991e99321149acb727669e8f0cde8d00
diff --git a/docs/core-data-structures/core.md b/docs/core-data-structures/core.md
index f289fa88de..d31d07556d 100644
--- a/docs/core-data-structures/core.md
+++ b/docs/core-data-structures/core.md
@@ -607,7 +607,7 @@ Pre-step decisions use the same identified `UserMessage` shape as durable user-r
 
 Source: [`packages/core/agent/src/types.ts`](../../packages/core/agent/src/types.ts)
 
-`agent/pre-step` receives the exclusive claimed batch and the proposed step's coordinates and cancellation signal. The initial proposal runs before its turn opens; a tool continuation may submit an empty claimed batch between steps:
+`agent/pre-step` receives the exclusive claimed batch and the proposed step's coordinates and cancellation signal. The initial proposal runs inside an open turn before any step; a tool continuation may submit an empty claimed batch between steps:
 
 ```ts type-equiv
 /** Coordinates and cancellation for a proposed step. */
diff --git a/docs/core-data-structures/core.zh.md b/docs/core-data-structures/core.zh.md
index 004b87e430..d1773fd899 100644
--- a/docs/core-data-structures/core.zh.md
+++ b/docs/core-data-structures/core.zh.md
@@ -615,7 +615,7 @@ pre-step 决策使用与持久 user-role 输入相同、带标识的 `UserMessag
 
 源码：[`packages/core/agent/src/types.ts`](../../packages/core/agent/src/types.ts)
 
-`agent/pre-step` 接收独占的已领取批次，以及拟进入步骤的坐标与取消 signal。首次提案发生在轮次打开前；工具 continuation 可以在步骤之间提交空的已领取批次：
+`agent/pre-step` 接收独占的已领取批次，以及拟进入步骤的坐标与取消 signal。首次提案在已打开的轮次内、任何步骤开始前运行；工具 continuation 可以在步骤之间提交空的已领取批次：
 
 ```ts type-equiv
 /** Coordinates and cancellation for a proposed step. */
diff --git a/docs/core-data-structures/session.i18n.yaml b/docs/core-data-structures/session.i18n.yaml
index 98ffdb0a6f..ec3d9c78ca 100644
--- a/docs/core-data-structures/session.i18n.yaml
+++ b/docs/core-data-structures/session.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 docs/core-data-structures/session.md
-session.md: 79090484c567bad020715d60de81c3333c12c570
-session.zh.md: af5e8a7a4edc2acfc03faf2e4f9e7270772a3e8c
+session.md: 998e6770a63b6afdb679ddd186da473e35927a02
+session.zh.md: 44e945a2b705846c30c7cfe4c25cb983dc00bee0
diff --git a/docs/core-data-structures/session.md b/docs/core-data-structures/session.md
index 79090484c5..998e6770a6 100644
--- a/docs/core-data-structures/session.md
+++ b/docs/core-data-structures/session.md
@@ -26,9 +26,10 @@ interface UserMessage extends Message {
  */
 interface SessionEventMap {
   /**
-   * Opens turn `turn`. Every turn begins after the loop claims queued input
-   * and accepts the pre-step result; the following identified `user/message`
-   * event or batch records the messages entering the step.
+   * Opens turn `turn` before the loop claims queued input or runs pre-step.
+   * Rejection, empty input, cancellation, or failure may close it with no
+   * step; otherwise the following identified `user/message` event or batch
+   * records the messages entering the step.
    */
   'turn/start': { turn: number }
   /**
@@ -564,7 +565,7 @@ Activity ordering excludes the boundary through `lastActivityTime(events)`: pick
 
 A plugin may declaration-merge extra `SessionEventMap` types. These are **log-only**: NOT `SurfaceEventType`s (they carry no `surfaceOp` and contribute nothing to derived history). Their owner decides whether they belong to an open execution turn or may stand between turns, and enforces any relation in its own invariant companion. The full per-event enumeration — core and plugin-contributed alike, with payloads and provenance — is the generated [persistence log event catalog](../persistence-catalog.md); the compaction seam's `compact/*` semantics are discussed on [compaction.md](compaction.md).
 
-The hook bridges' `hook/invoked` / `hook/result` provenance pairs (from `@deepseek-ai/dsh-hook-protocol`) correlate by `handlerId`. The mid-turn hook points (`PreToolUse`/`PostToolUse`/`Stop`) fire inside the loop's open turn, so their `hook/*` records are turn-enclosed by construction. `SessionStart` and the pre-turn `UserPromptSubmit` pre-step seam get no `hook/*` record because neither has an open turn to enclose one; entered context is instead evidenced by its sourced `user/message` (see [the hook-bridges Agent Note](../../.agents/notes/implemented/feature/2026-06-30-hook-bridges.md)).
+The hook bridges' `hook/invoked` / `hook/result` provenance pairs (from `@deepseek-ai/dsh-hook-protocol`) correlate by `handlerId`. `UserPromptSubmit`, `PreToolUse`, `PostToolUse`, and `Stop` fire inside the loop's open turn, so their `hook/*` records are turn-enclosed by construction. `SessionStart` gets no `hook/*` record because it runs before turn 1; its context remains pending in the inbox until a waking delivery opens a turn (see [the hook-bridges Agent Note](../../.agents/notes/implemented/feature/2026-06-30-hook-bridges.md)).
 
 ## Durability contract
 
diff --git a/docs/core-data-structures/session.zh.md b/docs/core-data-structures/session.zh.md
index af5e8a7a4e..44e945a2b7 100644
--- a/docs/core-data-structures/session.zh.md
+++ b/docs/core-data-structures/session.zh.md
@@ -26,9 +26,10 @@ interface UserMessage extends Message {
  */
 interface SessionEventMap {
   /**
-   * Opens turn `turn`. Every turn begins after the loop claims queued input
-   * and accepts the pre-step result; the following identified `user/message`
-   * event or batch records the messages entering the step.
+   * Opens turn `turn` before the loop claims queued input or runs pre-step.
+   * Rejection, empty input, cancellation, or failure may close it with no
+   * step; otherwise the following identified `user/message` event or batch
+   * records the messages entering the step.
    */
   'turn/start': { turn: number }
   /**
@@ -568,7 +569,7 @@ interface TurnEndReasonMap {
 
 插件可以通过 declaration merging 添加额外的 `SessionEventMap` 类型。这些是**仅日志**事件：不是 `SurfaceEventType`（不携带 `surfaceOp`，不参与派生历史）。事件所有方决定它们属于一个开放的执行轮次，还是可以独立位于轮次之间，并在自己的不变量配套插件中强制所需关系。完整的逐事件枚举（核心与插件贡献的，含 payload 与溯源信息）见生成的[持久化日志事件目录](../persistence-catalog.md)；压缩 seam 的 `compact/*` 语义在 [compaction.md](compaction.md) 中讨论。
 
-钩子桥接层的 `hook/invoked` / `hook/result` 溯源对（来自 `@deepseek-ai/dsh-hook-protocol`）通过 `handlerId` 关联。轮次中间的钩子点（`PreToolUse`/`PostToolUse`/`Stop`）在 loop 已打开的轮次内触发，因此其 `hook/*` 记录天然位于轮次之内。`SessionStart` 与初始 follow-up 在轮次开始前运行的 `UserPromptSubmit` pre-step 都不生成 `hook/*` 记录，因为二者都没有已打开的轮次可容纳该记录；进入步骤的上下文改由其带来源的 `user/message` 作为持久证据（见[钩子桥接 Agent Note](../../.agents/notes/implemented/feature/2026-06-30-hook-bridges.md)）。
+钩子桥接层的 `hook/invoked` / `hook/result` 溯源对（来自 `@deepseek-ai/dsh-hook-protocol`）通过 `handlerId` 关联。`UserPromptSubmit`、`PreToolUse`、`PostToolUse` 与 `Stop` 在 loop 已打开的轮次内触发，因此其 `hook/*` 记录天然位于轮次之内。`SessionStart` 不生成 `hook/*` 记录，因为它在轮次 1 之前运行；其上下文会在 inbox 中保持待处理，直到唤醒交付打开一个轮次（见[钩子桥接 Agent Note](../../.agents/notes/implemented/feature/2026-06-30-hook-bridges.md)）。
 
 ## 持久性契约
 
diff --git a/docs/event-producer-consumer.md b/docs/event-producer-consumer.md
index fab0c4a67d..1ff5ce3eb7 100644
--- a/docs/event-producer-consumer.md
+++ b/docs/event-producer-consumer.md
@@ -10,16 +10,16 @@ This matrix shows which packages dispatch each harness-owned event and which pac
 | `agent-loop/config-start-failed` | `emit` | [`packages/core/agent-loop/src/index.ts:157`](../packages/core/agent-loop/src/index.ts) | [`agent-loop`](../packages/core/agent-loop) (`events.dispatch`) | [`tui`](../packages/ui/tui) |
 | `agent/created` | `emit` | [`packages/core/agent/src/types.ts:178`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`goal-session`](../packages/goal/goal-session), [`tui`](../packages/ui/tui) |
 | `agent/disposed` | `emit` | [`packages/core/agent/src/types.ts:187`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`agent-loop`](../packages/core/agent-loop), [`goal-session`](../packages/goal/goal-session), [`subagent`](../packages/subagent/subagent), [`tui`](../packages/ui/tui) |
-| `agent/error` | `emit` | [`packages/core/agent/src/types.ts:303`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`acp`](../packages/acp/acp), `apiproxy`, [`goal-session`](../packages/goal/goal-session), [`session-telemetry`](../packages/telemetry/session-telemetry), [`tui`](../packages/ui/tui) |
-| `agent/inbox/claimed` | `emit` | [`packages/core/agent/src/types.ts:216`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`acp`](../packages/acp/acp), [`goal-session`](../packages/goal/goal-session), [`subagent`](../packages/subagent/subagent), [`tui`](../packages/ui/tui) |
-| `agent/inbox/discarded` | `emit` | [`packages/core/agent/src/types.ts:224`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`goal-session`](../packages/goal/goal-session), [`subagent`](../packages/subagent/subagent), [`tui`](../packages/ui/tui) |
+| `agent/error` | `emit` | [`packages/core/agent/src/types.ts:302`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`acp`](../packages/acp/acp), `apiproxy`, [`goal-session`](../packages/goal/goal-session), [`session-telemetry`](../packages/telemetry/session-telemetry), [`tui`](../packages/ui/tui) |
+| `agent/inbox/claimed` | `emit` | [`packages/core/agent/src/types.ts:215`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`acp`](../packages/acp/acp), [`goal-session`](../packages/goal/goal-session), [`subagent`](../packages/subagent/subagent), [`tui`](../packages/ui/tui) |
+| `agent/inbox/discarded` | `emit` | [`packages/core/agent/src/types.ts:223`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`goal-session`](../packages/goal/goal-session), [`subagent`](../packages/subagent/subagent), [`tui`](../packages/ui/tui) |
 | `agent/inbox/inserted` | `emit` | [`packages/core/agent/src/types.ts:205`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`goal-session`](../packages/goal/goal-session) |
-| `agent/pre-step` | `waterfall` | [`packages/core/agent/src/types.ts:248`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`compact-basic`](../packages/compact/compact-basic), [`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), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`time-context`](../packages/context/time-context), [`tmux-context`](../packages/context/tmux-context), [`tool-skill`](../packages/skill/tool-skill), [`tui`](../packages/ui/tui), [`workspace-context`](../packages/context/workspace-context) |
-| `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:261`](../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:273`](../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) |
-| `agent/session-start` | `emit` | [`packages/core/agent/src/types.ts:236`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
+| `agent/pre-step` | `waterfall` | [`packages/core/agent/src/types.ts:247`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`compact-basic`](../packages/compact/compact-basic), [`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), [`session-checkpoint-policy`](../packages/session-persistence/session-checkpoint-policy), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`time-context`](../packages/context/time-context), [`tmux-context`](../packages/context/tmux-context), [`tool-skill`](../packages/skill/tool-skill), [`tui`](../packages/ui/tui), [`workspace-context`](../packages/context/workspace-context) |
+| `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:260`](../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:272`](../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) |
+| `agent/session-start` | `emit` | [`packages/core/agent/src/types.ts:235`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
 | `agent/status` | `emit` | [`packages/core/agent/src/types.ts:197`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emitAgentEvent`) | [`agent`](../packages/core/agent), `apiproxy`, [`compact-basic`](../packages/compact/compact-basic), [`goal-session`](../packages/goal/goal-session), [`jsonrpc`](../packages/ui/jsonrpc), [`tui`](../packages/ui/tui) |
-| `agent/turn-stopping` | `serial` | [`packages/core/agent/src/types.ts:291`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
+| `agent/turn-stopping` | `serial` | [`packages/core/agent/src/types.ts:290`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
 | `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), `apiproxy` |
 | `commands/change` | `emit` | [`packages/ui/commands/src/index.ts:154`](../packages/ui/commands/src/index.ts) | [`commands`](../packages/ui/commands) (`events.dispatch`) | `apiproxy`, [`tui`](../packages/ui/tui) |
 | `credentials/updated` | `emit` | [`packages/credentials/credentials/src/index.ts:67`](../packages/credentials/credentials/src/index.ts) | [`credentials`](../packages/credentials/credentials) (`events.dispatch`) | `apiproxy`, [`credentials`](../packages/credentials/credentials) |
diff --git a/docs/persistence-catalog.md b/docs/persistence-catalog.md
index 5a4f266723..34d787269c 100644
--- a/docs/persistence-catalog.md
+++ b/docs/persistence-catalog.md
@@ -77,7 +77,7 @@ export type SessionEvent<T extends SessionEventType = SessionEventType> = {
 }[T]
 ```
 
-Sources: [`packages/core/session/src/types.ts:289`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:296`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:324`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:356`](../packages/core/session/src/types.ts)
+Sources: [`packages/core/session/src/types.ts:290`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:297`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:325`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:357`](../packages/core/session/src/types.ts)
 
 ## Events
 
@@ -100,7 +100,7 @@ Sources: [`packages/core/session/src/types.ts:289`](../packages/core/session/src
 }
 ```
 
-Source: [`packages/core/agent/src/types.ts:314`](../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:313`](../packages/core/agent/src/types.ts)
 
 ### `approval/*`
 
@@ -174,7 +174,7 @@ 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:219`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:220`](../packages/core/session/src/types.ts)
 
 #### `assistant/message` — surface
 
@@ -190,7 +190,7 @@ Source: [`packages/core/session/src/types.ts:219`](../packages/core/session/src/
 
 Types: [TokenUsage](core-data-structures/llm-streaming.md)
 
-Source: [`packages/core/session/src/types.ts:226`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:227`](../packages/core/session/src/types.ts)
 
 ### `command/*`
 
@@ -419,7 +419,7 @@ Source: [`packages/plan/plan-mode/src/index.ts:52`](../packages/plan/plan-mode/s
 'request/context': RequestContext
 ```
 
-Source: [`packages/core/session/src/types.ts:262`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:263`](../packages/core/session/src/types.ts)
 
 #### `request/header` — log-only
 
@@ -431,7 +431,7 @@ Source: [`packages/core/session/src/types.ts:262`](../packages/core/session/src/
 'request/header': { header: EpochHeader; reason: RequestHeaderReason }
 ```
 
-Source: [`packages/core/session/src/types.ts:257`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:258`](../packages/core/session/src/types.ts)
 
 ### `sandbox/*`
 
@@ -484,7 +484,7 @@ Source: [`packages/sandbox/sandbox-policy/src/session-mode.ts:33`](../packages/s
 'session/end-seed': Record<string, never>
 ```
 
-Source: [`packages/core/session/src/types.ts:285`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:286`](../packages/core/session/src/types.ts)
 
 #### `session/title` — log-only
 
@@ -520,7 +520,7 @@ Source: [`packages/session-title/session-title-llm/src/index.ts:43`](../packages
 'step/end': { turn: number; step: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:209`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:210`](../packages/core/session/src/types.ts)
 
 #### `step/start` — log-only
 
@@ -529,7 +529,7 @@ Source: [`packages/core/session/src/types.ts:209`](../packages/core/session/src/
 'step/start': { turn: number; step: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:207`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:208`](../packages/core/session/src/types.ts)
 
 ### `subagent/*`
 
@@ -559,7 +559,7 @@ Source: [`packages/subagent/subagent/src/descriptor.ts:37`](../packages/subagent
 
 Types: [TodoItem](core-data-structures/session.md)
 
-Source: [`packages/core/session/src/types.ts:252`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:253`](../packages/core/session/src/types.ts)
 
 ### `tool/*`
 
@@ -576,7 +576,7 @@ Source: [`packages/core/session/src/types.ts:252`](../packages/core/session/src/
 
 Types: [CallId](core-data-structures/core.md)
 
-Source: [`packages/core/session/src/types.ts:232`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:233`](../packages/core/session/src/types.ts)
 
 #### `tool/code-dispatch` — log-only
 
@@ -649,7 +649,7 @@ Source: [`packages/core/tools/src/code-mode.ts:33`](../packages/core/tools/src/c
 }
 ```
 
-Source: [`packages/core/session/src/types.ts:244`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:245`](../packages/core/session/src/types.ts)
 
 ### `turn/*`
 
@@ -669,20 +669,21 @@ Source: [`packages/core/session/src/types.ts:244`](../packages/core/session/src/
 
 Types: [TurnEndReason](core-data-structures/session.md)
 
-Source: [`packages/core/session/src/types.ts:205`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:206`](../packages/core/session/src/types.ts)
 
 #### `turn/start` — log-only
 
 ```ts persistence-catalog
 /**
- * Opens turn `turn`. Every turn begins after the loop claims queued input
- * and accepts the pre-step result; the following identified `user/message`
- * event or batch records the messages entering the step.
+ * Opens turn `turn` before the loop claims queued input or runs pre-step.
+ * Rejection, empty input, cancellation, or failure may close it with no
+ * step; otherwise the following identified `user/message` event or batch
+ * records the messages entering the step.
  */
 'turn/start': { turn: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:196`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:197`](../packages/core/session/src/types.ts)
 
 ### `user/*`
 
@@ -699,7 +700,7 @@ Source: [`packages/core/session/src/types.ts:196`](../packages/core/session/src/
 'user/message': UserMessage
 ```
 
-Source: [`packages/core/session/src/types.ts:217`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:218`](../packages/core/session/src/types.ts)
 
 ### `web/*`
 
diff --git a/examples/acp-agent/tests/goal-snapshots/goal-session/session.expected.jsonl b/examples/acp-agent/tests/goal-snapshots/goal-session/session.expected.jsonl
index 6d71904b09..e72ad637c5 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-session/session.expected.jsonl
+++ b/examples/acp-agent/tests/goal-snapshots/goal-session/session.expected.jsonl
@@ -1,7 +1,7 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
 {"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Create a durable two-round goal for the ACP snapshot, inspect it, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}
+{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
 {"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Create a durable two-round goal for the ACP snapshot, inspect it, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
@@ -38,8 +38,8 @@
 {"type":"step/end","seq":36,"time":0,"data":{"turn":1,"step":3}}
 {"type":"turn/end","seq":37,"time":0,"data":{"turn":1,"step":3,"reason":{"kind":"completed"}}}
 {"type":"agent/inbox/spliced","seq":38,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-session snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":39,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":40,"time":0,"data":{"turn":2}}
+{"type":"turn/start","seq":39,"time":0,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":40,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":41,"time":0,"data":{"turn":2,"step":1}}
 {"type":"user/message","seq":42,"time":0,"data":{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-session snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"assistant/chunk","seq":43,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -51,8 +51,8 @@
 {"type":"step/end","seq":49,"time":0,"data":{"turn":2,"step":1}}
 {"type":"turn/end","seq":50,"time":0,"data":{"turn":2,"step":1,"reason":{"kind":"completed"}}}
 {"type":"agent/inbox/spliced","seq":51,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-session snapshot proof\"\nRound: 2/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":2},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":52,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":53,"time":0,"data":{"turn":3}}
+{"type":"turn/start","seq":52,"time":0,"data":{"turn":3}}
+{"type":"agent/inbox/spliced","seq":53,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":54,"time":0,"data":{"turn":3,"step":1}}
 {"type":"user/message","seq":55,"time":0,"data":{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-session snapshot proof\"\nRound: 2/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":2},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"assistant/chunk","seq":56,"time":0,"data":{"turn":3,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
diff --git a/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl b/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl
index b4a57578c0..27d2b492f1 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl
+++ b/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl
@@ -1,7 +1,7 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
 {"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Create a durable goal for the wrap-up snapshot, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}
+{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
 {"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Create a durable goal for the wrap-up snapshot, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
@@ -28,8 +28,8 @@
 {"type":"step/end","seq":26,"time":0,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":27,"time":0,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
 {"type":"agent/inbox/spliced","seq":28,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal wrap-up snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":29,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":30,"time":0,"data":{"turn":2}}
+{"type":"turn/start","seq":29,"time":0,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":30,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":31,"time":0,"data":{"turn":2,"step":1}}
 {"type":"user/message","seq":32,"time":0,"data":{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal wrap-up snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"assistant/chunk","seq":33,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
index 0ef115f498..1bedc9dd16 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":1783950001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498801881,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f5114a09-a0eb-45db-8ece-eb5377910690"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498801881,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730458553,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
-{"type":"turn/start","seq":3,"time":1785730458555,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498801881,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ebe0cfa0-a909-47e0-8294-28ad84a8fe77"}]}}
+{"type":"turn/start","seq":1,"time":1785821418076,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821418076,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821418091,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
 {"type":"step/start","seq":4,"time":1785730458555,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730458555,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f5114a09-a0eb-45db-8ece-eb5377910690"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730458555,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d2e3d557-27b7-47fa-90ac-dc8fbbb3638a"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730458555,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ebe0cfa0-a909-47e0-8294-28ad84a8fe77"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730458555,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f9a2d1b6-8f23-43a5-8702-d413fed40990"},"surfaceOp":"append"}
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@@ -14,6 +14,6 @@
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+{"type":"assistant/message","seq":15,"time":1785730458561,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b9c977ca-2c1a-4a5e-8397-e0b9381a9943"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
index 191e4b6255..9158a1ea6c 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1783950002000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498802039,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"7fb910e5-0e23-4650-8850-14924326f34f"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498802039,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730458701,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
-{"type":"turn/start","seq":3,"time":1785730458703,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498802039,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2ac2cc54-9bce-4cfa-a569-a64f51bc30a7"}]}}
+{"type":"turn/start","seq":1,"time":1785821418251,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821418251,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821418270,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
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-{"type":"user/message","seq":5,"time":1785730458703,"data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"7fb910e5-0e23-4650-8850-14924326f34f"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730458703,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"4035d5bb-a2d6-4721-b071-22334175451c"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730458703,"data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2ac2cc54-9bce-4cfa-a569-a64f51bc30a7"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730458703,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"dfbcd587-db47-4c3d-bbe9-8c031b215fc3"},"surfaceOp":"append"}
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@@ -14,6 +14,6 @@
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-{"type":"assistant/message","seq":15,"time":1785730458709,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"348897be-3108-49dd-b31f-af2194923c71"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"assistant/message","seq":15,"time":1785730458709,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5c33b525-4844-4272-b6f2-e036356d0e22"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl
index 7ff2bbe03e..c9a22d29ba 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1783950000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498801734,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_ACP_OK."}],"source":{"kind":"user"},"role":"user","id":"d949654e-f16b-424e-99e0-2a5480b55d4f"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498801735,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498801761,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498801734,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_ACP_OK."}],"source":{"kind":"user"},"role":"user","id":"6e45782a-31be-4ba7-8c4a-7411a2027e36"}]}}
+{"type":"turn/start","seq":1,"time":1785821417918,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821417919,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
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-{"type":"user/message","seq":4,"time":1785498801761,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_ACP_OK."}],"source":{"kind":"user"},"role":"user","id":"d949654e-f16b-424e-99e0-2a5480b55d4f"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730458430,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"74658238-9820-404c-95ec-8d6cc344609c"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498801761,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_ACP_OK."}],"source":{"kind":"user"},"role":"user","id":"6e45782a-31be-4ba7-8c4a-7411a2027e36"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730458430,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"9f38e2b8-1d4e-4c90-8896-00aa42307ea7"},"surfaceOp":"append"}
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@@ -13,9 +13,9 @@
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-{"type":"assistant/message","seq":14,"time":1785730458440,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d2144927-054f-4560-9c66-8a073809440e"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730458440,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0713b7ec-0182-4820-8ec1-39d0371b533b"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
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-{"type":"tool/result","seq":16,"time":1785730458450,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-mount"},"content":[{"type":"tool-result","toolCallId":"advanced-mount","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-marker\"; available until unmounted or DSH restarts)."}],"isError":false}],"role":"user","id":"09e9fbfa-01af-4017-9700-137087afb2f1"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730458450,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-mount"},"content":[{"type":"tool-result","toolCallId":"advanced-mount","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-marker\"; available until unmounted or DSH restarts)."}],"isError":false}],"role":"user","id":"b10e76f0-e1a5-4c2c-b6a2-6cbdcf259cca"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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@@ -23,11 +23,11 @@
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-{"type":"assistant/message","seq":24,"time":1785730458465,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"958aa4a3-3c89-4c46-a0d8-f683c474132c"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730458465,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e3061430-3f2d-4dd8-a3ee-c0fde800547d"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
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 {"type":"tool/code-dispatch-start","seq":26,"time":1785730458517,"data":{"parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_inspect","arguments":{"what":"temporary"}}}
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-{"type":"tool/result","seq":28,"time":1785730458520,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"advanced-code"},"content":[{"type":"tool-result","toolCallId":"advanced-code","content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}],"isError":false}],"role":"user","id":"993edaa0-8207-4b43-96e6-d8101178b739"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
+{"type":"tool/result","seq":28,"time":1785730458520,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"advanced-code"},"content":[{"type":"tool-result","toolCallId":"advanced-code","content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}],"isError":false}],"role":"user","id":"4dce223d-0097-4ac2-a717-d1c430240cef"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
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@@ -35,9 +35,9 @@
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@@ -45,9 +45,9 @@
 {"type":"assistant/chunk","seq":43,"time":1785036891211,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-acp-snapshot\",\"description\":\"exercise one workflow child through ACP\"}}"}}}}
 {"type":"assistant/chunk","seq":44,"time":1785498801920,"data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":45,"time":1785730458577,"data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":46,"time":1785730458577,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-acp-snapshot\",\"description\":\"exercise one workflow child through ACP\"}}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0489c650-3cbe-40bc-8755-1244d605e225"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[41,42,43,44,45],"surfaceOp":"append"}
+{"type":"assistant/message","seq":46,"time":1785730458577,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-acp-snapshot\",\"description\":\"exercise one workflow child through ACP\"}}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ebeca5c6-68ae-43b3-87c3-c48fdfe416c8"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[41,42,43,44,45],"surfaceOp":"append"}
 {"type":"tool/call","seq":47,"time":1785730458577,"data":{"turn":1,"step":4,"callId":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-acp-snapshot\",\"description\":\"exercise one workflow child through ACP\"}}"}}
-{"type":"tool/result","seq":48,"time":1785730458711,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"advanced-workflow"},"content":[{"type":"tool-result","toolCallId":"advanced-workflow","content":[{"type":"text","text":"workflow \"advanced-acp-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"d9482415-aede-4e5d-94d4-f33bdf6ac586"}},"sourceEventSeqs":[47],"surfaceOp":"append"}
+{"type":"tool/result","seq":48,"time":1785730458711,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"advanced-workflow"},"content":[{"type":"tool-result","toolCallId":"advanced-workflow","content":[{"type":"text","text":"workflow \"advanced-acp-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"f892f17e-1e93-4f4b-9e9e-15116593b6fc"}},"sourceEventSeqs":[47],"surfaceOp":"append"}
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@@ -55,9 +55,9 @@
 {"type":"assistant/chunk","seq":53,"time":1785036891795,"data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}}}}
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 {"type":"assistant/chunk","seq":55,"time":1785730458728,"data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":56,"time":1785730458728,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a6a69af6-29d2-4990-9347-005f27e71445"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[51,52,53,54,55],"surfaceOp":"append"}
+{"type":"assistant/message","seq":56,"time":1785730458728,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1291ce3c-e568-4f0d-a95a-5157b8b2cc75"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[51,52,53,54,55],"surfaceOp":"append"}
 {"type":"tool/call","seq":57,"time":1785730458728,"data":{"turn":1,"step":5,"callId":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}}
-{"type":"tool/result","seq":58,"time":1785730458735,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"advanced-unmount"},"content":[{"type":"tool-result","toolCallId":"advanced-unmount","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false}],"role":"user","id":"1527af42-1df3-4c76-a45b-49e2ed401592"}},"sourceEventSeqs":[57],"surfaceOp":"append"}
+{"type":"tool/result","seq":58,"time":1785730458735,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"advanced-unmount"},"content":[{"type":"tool-result","toolCallId":"advanced-unmount","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false}],"role":"user","id":"b3634221-2358-4e82-aac5-e37f0a115023"}},"sourceEventSeqs":[57],"surfaceOp":"append"}
 {"type":"step/end","seq":59,"time":1785730458735,"data":{"turn":1,"step":5}}
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 {"type":"assistant/chunk","seq":61,"time":1783957884720,"data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -65,6 +65,6 @@
 {"type":"assistant/chunk","seq":63,"time":1785036891804,"data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ADVANCED_ACP_OK"}}}}
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 {"type":"assistant/chunk","seq":65,"time":1785730458751,"data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":66,"time":1785730458751,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"ADVANCED_ACP_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"794cab3e-8a28-45f1-b328-797d5b6f2e11"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[61,62,63,64,65],"surfaceOp":"append"}
+{"type":"assistant/message","seq":66,"time":1785730458751,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"ADVANCED_ACP_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a32b89ce-13ed-48ba-a7f9-24144b94ec56"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[61,62,63,64,65],"surfaceOp":"append"}
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 {"type":"turn/end","seq":68,"time":1785730458751,"data":{"turn":1,"step":6,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl b/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
index 734b846aa3..eab5cad16e 100644
--- a/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498767644,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to print a large deterministic output, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"29593b19-3546-41fb-a1e9-d60e085964ba"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498767645,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498767671,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498767644,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to print a large deterministic output, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"4f33bd12-21b5-4ccc-bbd2-4edb0ab6b33b"}]}}
+{"type":"turn/start","seq":1,"time":1785821368742,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821368742,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498767672,"data":{"content":[{"type":"text","text":"Use the bash tool to print a large deterministic output, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"29593b19-3546-41fb-a1e9-d60e085964ba"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730421018,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"94960965-74b0-4f4d-a831-930958795025"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498767672,"data":{"content":[{"type":"text","text":"Use the bash tool to print a large deterministic output, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"4f33bd12-21b5-4ccc-bbd2-4edb0ab6b33b"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730421018,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"ac1209c1-ce77-4622-a7c4-b39225fda7ab"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730421018,"data":{"title":"Use the bash tool to","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498767673,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730421019,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"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\"}"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785498767682,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730421028,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730421028,"data":{"turn":1,"step":1,"message":{"role":"assistant","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\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2dea49cc-cd69-4216-af30-a4132df042c3"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730421028,"data":{"turn":1,"step":1,"message":{"role":"assistant","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\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0f836022-e1b6-4a44-9f49-5472f824fbc9"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"tool/call","seq":15,"time":1785730421028,"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":16,"time":1785730421070,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_spill"},"content":[{"type":"tool-result","toolCallId":"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-5e53dc8acfe4/2ce9d7a31a38-bash.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false}],"role":"user","id":"b838a383-f17b-49b4-8d52-21191a438e11"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730421070,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_spill"},"content":[{"type":"tool-result","toolCallId":"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-5e53dc8acfe4/2ce9d7a31a38-bash.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false}],"role":"user","id":"4f751bc4-b81f-4045-b86a-407a4bd08bbe"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
 {"type":"step/end","seq":17,"time":1785730421070,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":18,"time":1785730421081,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -23,6 +23,6 @@
 {"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":22,"time":1785498767739,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
 {"type":"assistant/chunk","seq":23,"time":1785730421085,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":1785730421085,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2784a25a-bd90-47ac-a37f-81fc84c398f7"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730421085,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"64dccb5c-e621-47f1-af30-04dc7f4ba59d"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
 {"type":"step/end","seq":25,"time":1785730421086,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":26,"time":1785730421086,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl b/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
index 87befed5aa..b91e5ac37c 100644
--- a/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"e128dda9-ed11-4868-8266-0ef90d03c3d6","createdAt":1783352050748,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498771334,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo TERMINAL_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"5a938ee6-f96a-4390-8125-8fa74549ef8f"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498771334,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498771360,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498771334,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo TERMINAL_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"38694db6-921d-41fd-b1fb-3b0c40caf67c"}]}}
+{"type":"turn/start","seq":1,"time":1785821375023,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821375023,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352050755,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498771360,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo TERMINAL_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"5a938ee6-f96a-4390-8125-8fa74549ef8f"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730424635,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"a0903e0e-730b-4be0-b6e5-2b25cf940fb0"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498771360,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo TERMINAL_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"38694db6-921d-41fd-b1fb-3b0c40caf67c"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730424635,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"80474489-442a-4e98-beef-df6cd1e85870"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730424635,"data":{"title":"Use the bash tool to","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498771361,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730424636,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,9 +16,9 @@
 {"type":"assistant/chunk","seq":61,"time":1783352052118,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","name":"bash","arguments":"{\"command\": \"echo TERMINAL_OK\", \"description\": \"Echo TERMINAL_OK to verify terminal access\"}"}}}}
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-{"type":"assistant/message","seq":64,"time":1785730424645,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and then reply with \"DONE\"."},{"type":"tool-call","id":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","name":"bash","arguments":"{\"command\": \"echo TERMINAL_OK\", \"description\": \"Echo TERMINAL_OK to verify terminal access\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a038004e-9805-4353-a991-244ae57eb6c8"},"usage":{"inputTokens":2877,"outputTokens":90,"cacheReadTokens":0,"reasoningTokens":18}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63],"surfaceOp":"append"}
+{"type":"assistant/message","seq":64,"time":1785730424645,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and then reply with \"DONE\"."},{"type":"tool-call","id":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","name":"bash","arguments":"{\"command\": \"echo TERMINAL_OK\", \"description\": \"Echo TERMINAL_OK to verify terminal access\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0a855246-fbf6-4f91-87b4-c6f1889effe7"},"usage":{"inputTokens":2877,"outputTokens":90,"cacheReadTokens":0,"reasoningTokens":18}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63],"surfaceOp":"append"}
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-{"type":"tool/result","seq":66,"time":1785730424665,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233"},"content":[{"type":"tool-result","toolCallId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","content":[{"type":"text","text":"TERMINAL_OK\n"}],"isError":false}],"role":"user","id":"8094bd8b-556b-4380-890f-b20158d4beba"}},"sourceEventSeqs":[65],"surfaceOp":"append"}
+{"type":"tool/result","seq":66,"time":1785730424665,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233"},"content":[{"type":"tool-result","toolCallId":"call_00_fkbBRJsUrGKd1pWVc4Gn8233","content":[{"type":"text","text":"TERMINAL_OK\n"}],"isError":false}],"role":"user","id":"908ca4f5-efbb-443b-9b07-acbf25edf954"}},"sourceEventSeqs":[65],"surfaceOp":"append"}
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@@ -30,6 +30,6 @@
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-{"type":"assistant/message","seq":99,"time":1785730424681,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command ran successfully and output \"TERMINAL_OK\". I should now reply with just \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"52466dd5-c30d-4e69-af66-15a270d5791e"},"usage":{"inputTokens":168,"outputTokens":25,"cacheReadTokens":2816,"reasoningTokens":22}},"sourceEventSeqs":[69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98],"surfaceOp":"append"}
+{"type":"assistant/message","seq":99,"time":1785730424681,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command ran successfully and output \"TERMINAL_OK\". I should now reply with just \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"aa705bf0-9b5b-4af3-9763-dbf93c98e4c4"},"usage":{"inputTokens":168,"outputTokens":25,"cacheReadTokens":2816,"reasoningTokens":22}},"sourceEventSeqs":[69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl b/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
index 087bc5c33e..bacd0f5330 100644
--- a/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"2e3b6a68-ed7b-4263-93a8-e9ffbf77b457","createdAt":1785014504343,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498827086,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the run_code tool (NOT the native bash tool directly) with a program that runs exactly `echo BOTH_OK` via tools.bash and returns its output. Then reply with that output only and stop."}],"source":{"kind":"user"},"role":"user","id":"ebdebf91-fd38-4e7c-98b6-9e705c0552d5"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498827087,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498827112,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498827086,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the run_code tool (NOT the native bash tool directly) with a program that runs exactly `echo BOTH_OK` via tools.bash and returns its output. Then reply with that output only and stop."}],"source":{"kind":"user"},"role":"user","id":"922e078d-9ef7-4017-9c4e-96a34a721503"}]}}
+{"type":"turn/start","seq":1,"time":1785821443048,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821443048,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785014504370,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498827112,"data":{"content":[{"type":"text","text":"Call the run_code tool (NOT the native bash tool directly) with a program that runs exactly `echo BOTH_OK` via tools.bash and returns its output. Then reply with that output only and stop."}],"source":{"kind":"user"},"role":"user","id":"ebdebf91-fd38-4e7c-98b6-9e705c0552d5"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730479344,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"765a480f-6fb2-4f86-abb0-ec54d7f52938"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498827112,"data":{"content":[{"type":"text","text":"Call the run_code tool (NOT the native bash tool directly) with a program that runs exactly `echo BOTH_OK` via tools.bash and returns its output. Then reply with that output only and stop."}],"source":{"kind":"user"},"role":"user","id":"922e078d-9ef7-4017-9c4e-96a34a721503"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730479344,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d3891fd4-21eb-4869-8a66-498764450bf2"},"surfaceOp":"append"}
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@@ -16,11 +16,11 @@
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-{"type":"assistant/message","seq":104,"time":1785730479356,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to call the run_code tool with a TypeScript program that runs `echo BOTH_OK` via `tools.bash` and returns its output."},{"type":"tool-call","id":"call_00_Era4M5eh79bvNOIey5q90401","name":"run_code","arguments":"{\"code\": \"const result = await tools.bash({ command: \\\"echo BOTH_OK\\\", description: \\\"Print BOTH_OK\\\" });\\nreturn result.stdout.text;\", \"description\": \"Run echo BOTH_OK via tools.bash\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"334257ef-26e9-49a6-afb8-85cba6046cc0"},"usage":{"inputTokens":10400,"outputTokens":130,"cacheReadTokens":0,"reasoningTokens":34}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103],"surfaceOp":"append"}
+{"type":"assistant/message","seq":104,"time":1785730479356,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to call the run_code tool with a TypeScript program that runs `echo BOTH_OK` via `tools.bash` and returns its output."},{"type":"tool-call","id":"call_00_Era4M5eh79bvNOIey5q90401","name":"run_code","arguments":"{\"code\": \"const result = await tools.bash({ command: \\\"echo BOTH_OK\\\", description: \\\"Print BOTH_OK\\\" });\\nreturn result.stdout.text;\", \"description\": \"Run echo BOTH_OK via tools.bash\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5f1cf31c-fd73-42fc-805d-a14d91228bd9"},"usage":{"inputTokens":10400,"outputTokens":130,"cacheReadTokens":0,"reasoningTokens":34}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103],"surfaceOp":"append"}
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-{"type":"tool/result","seq":108,"time":1785730479423,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Era4M5eh79bvNOIey5q90401"},"content":[{"type":"tool-result","toolCallId":"call_00_Era4M5eh79bvNOIey5q90401","content":[{"type":"text","text":"BOTH_OK\n"}],"isError":false}],"role":"user","id":"9e4c2c74-12a8-47d6-b5c2-cdf76d8a0254"}},"sourceEventSeqs":[105],"surfaceOp":"append"}
+{"type":"tool/result","seq":108,"time":1785730479423,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Era4M5eh79bvNOIey5q90401"},"content":[{"type":"tool-result","toolCallId":"call_00_Era4M5eh79bvNOIey5q90401","content":[{"type":"text","text":"BOTH_OK\n"}],"isError":false}],"role":"user","id":"028e19dd-dcfc-4a67-a6e4-c9fa19716ea3"}},"sourceEventSeqs":[105],"surfaceOp":"append"}
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@@ -31,6 +31,6 @@
 {"type":"assistant/chunk","seq":148,"time":1785014507785,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"BOTH_OK"}}}}
 {"type":"assistant/chunk","seq":149,"time":1785498827217,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":50,"outputTokens":35,"cacheReadTokens":10496,"reasoningTokens":31}}}}
 {"type":"assistant/chunk","seq":150,"time":1785730479437,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":151,"time":1785730479437,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The output is \"BOTH_OK\" (with a trailing newline, but that's fine). The user asked me to reply with that output only."},{"type":"text","text":"BOTH_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"61198a77-bc44-4a3f-9044-44d5115b110b"},"usage":{"inputTokens":50,"outputTokens":35,"cacheReadTokens":10496,"reasoningTokens":31}},"sourceEventSeqs":[111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150],"surfaceOp":"append"}
+{"type":"assistant/message","seq":151,"time":1785730479437,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The output is \"BOTH_OK\" (with a trailing newline, but that's fine). The user asked me to reply with that output only."},{"type":"text","text":"BOTH_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"dbd0a9c9-1f19-405d-ad05-86f90447e006"},"usage":{"inputTokens":50,"outputTokens":35,"cacheReadTokens":10496,"reasoningTokens":31}},"sourceEventSeqs":[111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl b/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
index 0358018cd1..fbeb6ddbcc 100644
--- a/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498792491,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run two shell commands: wait for cancellation, then write skipped.txt."}],"source":{"kind":"user"},"role":"user","id":"2d57db95-8122-4ccd-b711-855572105aab"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498792491,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498792518,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498792491,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run two shell commands: wait for cancellation, then write skipped.txt."}],"source":{"kind":"user"},"role":"user","id":"6025dc7c-dc38-4a34-b7b1-688102631c75"}]}}
+{"type":"turn/start","seq":1,"time":1785821402705,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821402705,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784437195076,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498792518,"data":{"content":[{"type":"text","text":"Run two shell commands: wait for cancellation, then write skipped.txt."}],"source":{"kind":"user"},"role":"user","id":"2d57db95-8122-4ccd-b711-855572105aab"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730445587,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"e038a0c3-5d2f-49a3-b49f-d399c238b2b1"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498792518,"data":{"content":[{"type":"text","text":"Run two shell commands: wait for cancellation, then write skipped.txt."}],"source":{"kind":"user"},"role":"user","id":"6025dc7c-dc38-4a34-b7b1-688102631c75"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730445587,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"bf953438-d1c4-4e00-a06b-7f5e2da1df7a"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730445587,"data":{"title":"Run two shell commands: wait","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498792519,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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@@ -16,10 +16,10 @@
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 {"type":"assistant/chunk","seq":16,"time":1785730445597,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":17,"time":1785730445597,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"},{"type":"tool-call","id":"call_skipped","name":"bash","arguments":"{\"command\":\"printf skipped > skipped.txt\",\"description\":\"Write skipped marker\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6af93b66-d1ff-4249-83ab-7d68e21a1bf6"},"usage":{"inputTokens":10,"outputTokens":10}},"sourceEventSeqs":[9,10,11,12,13,14,15,16],"surfaceOp":"append"}
+{"type":"assistant/message","seq":17,"time":1785730445597,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"},{"type":"tool-call","id":"call_skipped","name":"bash","arguments":"{\"command\":\"printf skipped > skipped.txt\",\"description\":\"Write skipped marker\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"57600715-8366-4277-9cb3-3b6f55fef1ec"},"usage":{"inputTokens":10,"outputTokens":10}},"sourceEventSeqs":[9,10,11,12,13,14,15,16],"surfaceOp":"append"}
 {"type":"tool/call","seq":18,"time":1785730445598,"data":{"turn":1,"step":1,"callId":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"}}
-{"type":"tool/result","seq":19,"time":1785730445645,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_wait"},"content":[{"type":"tool-result","toolCallId":"call_wait","content":[{"type":"text","text":"Error: command aborted"}],"isError":true}],"role":"user","id":"35c8f666-ae41-4f20-90a1-c451c045feb3"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
+{"type":"tool/result","seq":19,"time":1785730445645,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_wait"},"content":[{"type":"tool-result","toolCallId":"call_wait","content":[{"type":"text","text":"Error: command aborted"}],"isError":true}],"role":"user","id":"f8706456-630a-419b-83b6-91a9f7e464d7"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
 {"type":"tool/call","seq":20,"time":1785730445645,"data":{"turn":1,"step":1,"callId":"call_skipped","name":"bash","arguments":"{\"command\":\"printf skipped > skipped.txt\",\"description\":\"Write skipped marker\"}"}}
-{"type":"tool/result","seq":21,"time":1785730445645,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skipped"},"content":[{"type":"tool-result","toolCallId":"call_skipped","content":[{"type":"text","text":"Error: tool call aborted before dispatch"}],"isError":true}],"role":"user","id":"f9f0ca62-be2b-453f-98cd-41f5ced6f651"},"error":{"name":"AbortError","code":"ABORTED_BEFORE_DISPATCH"}},"sourceEventSeqs":[20],"surfaceOp":"append"}
+{"type":"tool/result","seq":21,"time":1785730445645,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skipped"},"content":[{"type":"tool-result","toolCallId":"call_skipped","content":[{"type":"text","text":"Error: tool call aborted before dispatch"}],"isError":true}],"role":"user","id":"55c65cec-41ad-4361-bc86-e82b7726d445"},"error":{"name":"AbortError","code":"ABORTED_BEFORE_DISPATCH"}},"sourceEventSeqs":[20],"surfaceOp":"append"}
 {"type":"step/end","seq":22,"time":1785730445645,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":23,"time":1785730445645,"data":{"turn":1,"step":1,"reason":{"kind":"aborted","reason":{"kind":"user"}}}}
diff --git a/examples/acp-agent/tests/snapshots/cancel/session.jsonl b/examples/acp-agent/tests/snapshots/cancel/session.jsonl
index 1474d54e5c..2c8c816797 100644
--- a/examples/acp-agent/tests/snapshots/cancel/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498791421,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"e382863f-5d7f-481f-a819-105a4a92ba9f"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498791421,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498791445,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498791421,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"f74653c2-8793-4004-ab0d-833a8dfd42bf"}]}}
+{"type":"turn/start","seq":1,"time":1785821401560,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821401560,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498791446,"data":{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"e382863f-5d7f-481f-a819-105a4a92ba9f"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730444531,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"6b0bebbf-260f-4dca-9d40-23463bb7143e"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498791446,"data":{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"f74653c2-8793-4004-ab0d-833a8dfd42bf"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730444531,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"2c4c8dc2-5141-4963-adbc-5928729d3bf6"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730444531,"data":{"title":"Start a long task; this","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498791447,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730444532,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
diff --git a/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl b/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
index 77cbd2252b..b3e60f5a6f 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"cafeb691-a146-424a-8016-52f51b0aaaa4","createdAt":1785014439563,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498824594,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program: call the bash tool twice — exactly `echo CODE_ONE` then exactly `echo CODE_TWO`. Inside that same program, console.log exactly `captured output`, then return the two outputs joined with a plus sign. Reply with that joined string only and stop."}],"source":{"kind":"user"},"role":"user","id":"e95129e3-2baa-4a29-a534-54dc91745d39"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498824594,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498824620,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498824594,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program: call the bash tool twice — exactly `echo CODE_ONE` then exactly `echo CODE_TWO`. Inside that same program, console.log exactly `captured output`, then return the two outputs joined with a plus sign. Reply with that joined string only and stop."}],"source":{"kind":"user"},"role":"user","id":"8e2d7086-925a-4734-ba89-418940b0ee58"}]}}
+{"type":"turn/start","seq":1,"time":1785821440493,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821440493,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785014439593,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498824620,"data":{"content":[{"type":"text","text":"Using ONE run_code program: call the bash tool twice — exactly `echo CODE_ONE` then exactly `echo CODE_TWO`. Inside that same program, console.log exactly `captured output`, then return the two outputs joined with a plus sign. Reply with that joined string only and stop."}],"source":{"kind":"user"},"role":"user","id":"e95129e3-2baa-4a29-a534-54dc91745d39"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730477066,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"00314388-e9c2-471b-ac1d-7483df8ef5dc"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498824620,"data":{"content":[{"type":"text","text":"Using ONE run_code program: call the bash tool twice — exactly `echo CODE_ONE` then exactly `echo CODE_TWO`. Inside that same program, console.log exactly `captured output`, then return the two outputs joined with a plus sign. Reply with that joined string only and stop."}],"source":{"kind":"user"},"role":"user","id":"8e2d7086-925a-4734-ba89-418940b0ee58"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730477066,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"ea97a8e4-de78-4638-b80a-c24dfeaba555"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730477066,"data":{"title":"Using ONE run_code program: call","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498824624,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730477067,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,13 +16,13 @@
 {"type":"assistant/chunk","seq":185,"time":1785014442995,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_UiQPVqoELyzBZCY5pm1z7875","name":"run_code","arguments":"{\"code\": \"\\nconst out1 = await tools.bash({command: \\\"echo CODE_ONE\\\", description: \\\"Print CODE_ONE\\\"});\\nconst out2 = await tools.bash({command: \\\"echo CODE_TWO\\\", description: \\\"Print CODE_TWO\\\"});\\nconsole.log(\\\"captured output\\\");\\nconst text1 = out1.stdout.text.trim();\\nconst text2 = out2.stdout.text.trim();\\nreturn text1 + \\\"+\\\" + text2;\\n\", \"description\": \"Run two echo commands and join outputs\"}"}}}}
 {"type":"assistant/chunk","seq":186,"time":1785498824638,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":6152,"outputTokens":214,"cacheReadTokens":0,"reasoningTokens":60}}}}
 {"type":"assistant/chunk","seq":187,"time":1785730477079,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":188,"time":1785730477079,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to write a single run_code program that:\n1. Calls bash tool twice: `echo CODE_ONE` and `echo CODE_TWO`\n2. console.log exactly `captured output`\n3. Return the two outputs joined with a plus sign\n\nLet me write this."},{"type":"tool-call","id":"call_00_UiQPVqoELyzBZCY5pm1z7875","name":"run_code","arguments":"{\"code\": \"\\nconst out1 = await tools.bash({command: \\\"echo CODE_ONE\\\", description: \\\"Print CODE_ONE\\\"});\\nconst out2 = await tools.bash({command: \\\"echo CODE_TWO\\\", description: \\\"Print CODE_TWO\\\"});\\nconsole.log(\\\"captured output\\\");\\nconst text1 = out1.stdout.text.trim();\\nconst text2 = out2.stdout.text.trim();\\nreturn text1 + \\\"+\\\" + text2;\\n\", \"description\": \"Run two echo commands and join outputs\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"03cc785c-fa74-4946-bdef-9ec21baa861b"},"usage":{"inputTokens":6152,"outputTokens":214,"cacheReadTokens":0,"reasoningTokens":60}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187],"surfaceOp":"append"}
+{"type":"assistant/message","seq":188,"time":1785730477079,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to write a single run_code program that:\n1. Calls bash tool twice: `echo CODE_ONE` and `echo CODE_TWO`\n2. console.log exactly `captured output`\n3. Return the two outputs joined with a plus sign\n\nLet me write this."},{"type":"tool-call","id":"call_00_UiQPVqoELyzBZCY5pm1z7875","name":"run_code","arguments":"{\"code\": \"\\nconst out1 = await tools.bash({command: \\\"echo CODE_ONE\\\", description: \\\"Print CODE_ONE\\\"});\\nconst out2 = await tools.bash({command: \\\"echo CODE_TWO\\\", description: \\\"Print CODE_TWO\\\"});\\nconsole.log(\\\"captured output\\\");\\nconst text1 = out1.stdout.text.trim();\\nconst text2 = out2.stdout.text.trim();\\nreturn text1 + \\\"+\\\" + text2;\\n\", \"description\": \"Run two echo commands and join outputs\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"59e638d7-2aa2-48a2-ae0e-5833b1152ce6"},"usage":{"inputTokens":6152,"outputTokens":214,"cacheReadTokens":0,"reasoningTokens":60}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187],"surfaceOp":"append"}
 {"type":"tool/call","seq":189,"time":1785730477080,"data":{"turn":1,"step":1,"callId":"call_00_UiQPVqoELyzBZCY5pm1z7875","name":"run_code","arguments":"{\"code\": \"\\nconst out1 = await tools.bash({command: \\\"echo CODE_ONE\\\", description: \\\"Print CODE_ONE\\\"});\\nconst out2 = await tools.bash({command: \\\"echo CODE_TWO\\\", description: \\\"Print CODE_TWO\\\"});\\nconsole.log(\\\"captured output\\\");\\nconst text1 = out1.stdout.text.trim();\\nconst text2 = out2.stdout.text.trim();\\nreturn text1 + \\\"+\\\" + text2;\\n\", \"description\": \"Run two echo commands and join outputs\"}"}}
 {"type":"tool/code-dispatch-start","seq":190,"time":1785730477131,"data":{"parentCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875","subCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875:code:1","name":"bash","arguments":{"command":"echo CODE_ONE","description":"Print CODE_ONE"}}}
 {"type":"tool/code-dispatch","seq":191,"time":1785730477144,"data":{"parentCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875","subCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875:code:1","name":"bash","arguments":{"command":"echo CODE_ONE","description":"Print CODE_ONE"},"isError":false,"content":[{"type":"text","text":"CODE_ONE\n"}]}}
 {"type":"tool/code-dispatch-start","seq":192,"time":1785730477144,"data":{"parentCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875","subCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875:code:2","name":"bash","arguments":{"command":"echo CODE_TWO","description":"Print CODE_TWO"}}}
 {"type":"tool/code-dispatch","seq":193,"time":1785730477148,"data":{"parentCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875","subCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875:code:2","name":"bash","arguments":{"command":"echo CODE_TWO","description":"Print CODE_TWO"},"isError":false,"content":[{"type":"text","text":"CODE_TWO\n"}]}}
-{"type":"tool/result","seq":194,"time":1785730477150,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_UiQPVqoELyzBZCY5pm1z7875"},"content":[{"type":"tool-result","toolCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875","content":[{"type":"text","text":"captured output\nCODE_ONE+CODE_TWO"}],"isError":false}],"role":"user","id":"bd181318-9792-401d-b032-cd2edbb4a117"}},"sourceEventSeqs":[189],"surfaceOp":"append"}
+{"type":"tool/result","seq":194,"time":1785730477150,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_UiQPVqoELyzBZCY5pm1z7875"},"content":[{"type":"tool-result","toolCallId":"call_00_UiQPVqoELyzBZCY5pm1z7875","content":[{"type":"text","text":"captured output\nCODE_ONE+CODE_TWO"}],"isError":false}],"role":"user","id":"e40c6472-d68e-4be1-963f-edb0edc80d82"}},"sourceEventSeqs":[189],"surfaceOp":"append"}
 {"type":"step/end","seq":195,"time":1785730477150,"data":{"turn":1,"step":1}}
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 {"type":"assistant/chunk","seq":197,"time":1785014443887,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -33,6 +33,6 @@
 {"type":"assistant/chunk","seq":249,"time":1785014444392,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"CODE_ONE+CODE_TWO"}}}}
 {"type":"assistant/chunk","seq":250,"time":1785498824729,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":117,"outputTokens":50,"cacheReadTokens":6272,"reasoningTokens":42}}}}
 {"type":"assistant/chunk","seq":251,"time":1785730477165,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":252,"time":1785730477165,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The program ran successfully. The console.log output \"captured output\" appeared, and the return value is \"CODE_ONE+CODE_TWO\". The user asked me to reply with that joined string only."},{"type":"text","text":"CODE_ONE+CODE_TWO"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f0ba0161-be90-41ad-978e-a07f74061974"},"usage":{"inputTokens":117,"outputTokens":50,"cacheReadTokens":6272,"reasoningTokens":42}},"sourceEventSeqs":[197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251],"surfaceOp":"append"}
+{"type":"assistant/message","seq":252,"time":1785730477165,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The program ran successfully. The console.log output \"captured output\" appeared, and the return value is \"CODE_ONE+CODE_TWO\". The user asked me to reply with that joined string only."},{"type":"text","text":"CODE_ONE+CODE_TWO"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e435b807-b35f-48d3-846f-a5c59333c316"},"usage":{"inputTokens":117,"outputTokens":50,"cacheReadTokens":6272,"reasoningTokens":42}},"sourceEventSeqs":[197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
index f57041ab41..cf1318ae47 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"b1e35a14-a592-44e6-bf23-b2496ad2bf7b","createdAt":1785014475001,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498825884,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program, call tools.read on nested/task.txt. After the program finishes, answer the workspace handshake question using the newly discovered instructions: What is the Code Mode workspace handshake?"}],"source":{"kind":"user"},"role":"user","id":"e431aa26-6f5a-48e6-8924-3ca14f69436e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498825884,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785498825916,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"}]},"role":"user","id":"2de6b267-3a7c-4af8-8e34-cd607915c10e"}]}}
-{"type":"turn/start","seq":3,"time":1785498825916,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498825884,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program, call tools.read on nested/task.txt. After the program finishes, answer the workspace handshake question using the newly discovered instructions: What is the Code Mode workspace handshake?"}],"source":{"kind":"user"},"role":"user","id":"433d493a-0b85-4b92-8063-cfa19b8f7d10"}]}}
+{"type":"turn/start","seq":1,"time":1785821441771,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785498825916,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"agent/inbox/spliced","seq":3,"time":1785821441803,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"}]},"role":"user","id":"5578ed99-ced0-42af-b8f6-651e8aaf72e5"}]}}
 {"type":"step/start","seq":4,"time":1785122256264,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785498825917,"data":{"content":[{"type":"text","text":"Using ONE run_code program, call tools.read on nested/task.txt. After the program finishes, answer the workspace handshake question using the newly discovered instructions: What is the Code Mode workspace handshake?"}],"source":{"kind":"user"},"role":"user","id":"e431aa26-6f5a-48e6-8924-3ca14f69436e"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730478198,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d43577de-e7c8-4d8b-9b59-e67a18de47da"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785498825917,"data":{"content":[{"type":"text","text":"Using ONE run_code program, call tools.read on nested/task.txt. After the program finishes, answer the workspace handshake question using the newly discovered instructions: What is the Code Mode workspace handshake?"}],"source":{"kind":"user"},"role":"user","id":"433d493a-0b85-4b92-8063-cfa19b8f7d10"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730478198,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"adca0c36-3b6e-4d58-9076-c0b4e6681030"},"surfaceOp":"append"}
 {"type":"session/title","seq":7,"time":1785730478198,"data":{"title":"Using ONE run_code program, call","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":8,"time":1785498825920,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":9,"time":1785730478199,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -14,28 +14,28 @@
 {"type":"assistant/chunk","seq":12,"time":1785014475639,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_workspace_read","name":"run_code","arguments":"{\"code\":\"return await tools.read({ file_path: 'nested/task.txt' })\",\"description\":\"Read nested/task.txt\"}"}}}}
 {"type":"assistant/chunk","seq":13,"time":1785014475639,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":14,"time":1785014475639,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":15,"time":1785733131056,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_workspace_read","name":"run_code","arguments":"{\"code\":\"return await tools.read({ file_path: 'nested/task.txt' })\",\"description\":\"Read nested/task.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d4eff2fe-d826-47f7-b604-5c7df4fd432a"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"assistant/message","seq":15,"time":1785733131056,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_workspace_read","name":"run_code","arguments":"{\"code\":\"return await tools.read({ file_path: 'nested/task.txt' })\",\"description\":\"Read nested/task.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b6030d5a-27fb-42a4-b1a4-5e2893e4dfe2"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
 {"type":"tool/call","seq":16,"time":1785733131056,"data":{"turn":1,"step":1,"callId":"call_workspace_read","name":"run_code","arguments":"{\"code\":\"return await tools.read({ file_path: 'nested/task.txt' })\",\"description\":\"Read nested/task.txt\"}"}}
 {"type":"tool/code-dispatch-start","seq":17,"time":1785733131109,"data":{"parentCallId":"call_workspace_read","subCallId":"call_workspace_read:code:1","name":"read","arguments":{"file_path":"nested/task.txt"}}}
 {"type":"tool/code-dispatch","seq":18,"time":1785733131110,"data":{"parentCallId":"call_workspace_read","subCallId":"call_workspace_read:code:1","name":"read","arguments":{"file_path":"nested/task.txt"},"isError":false,"content":[{"type":"text","text":"<path>{{cwd}}/nested/task.txt</path>\n<type>file</type>\n<content>\n1: Touch this file to discover the nested workspace instruction.\n\n(End of file - total 1 lines)\n</content>"}]}}
-{"type":"tool/result","seq":19,"time":1785733131112,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_workspace_read"},"content":[{"type":"tool-result","toolCallId":"call_workspace_read","content":[{"type":"text","text":"{\n  \"path\": \"{{cwd}}/nested/task.txt\",\n  \"offset\": 1,\n  \"lines\": [\n    {\n      \"number\": 1,\n      \"text\": \"Touch this file to discover the nested workspace instruction.\"\n    }\n  ],\n  \"totalLines\": 1\n}"}],"isError":false}],"role":"user","id":"5f171b85-5b82-4d25-a1bf-0c5f68adb294"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
+{"type":"tool/result","seq":19,"time":1785733131112,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_workspace_read"},"content":[{"type":"tool-result","toolCallId":"call_workspace_read","content":[{"type":"text","text":"{\n  \"path\": \"{{cwd}}/nested/task.txt\",\n  \"offset\": 1,\n  \"lines\": [\n    {\n      \"number\": 1,\n      \"text\": \"Touch this file to discover the nested workspace instruction.\"\n    }\n  ],\n  \"totalLines\": 1\n}"}],"isError":false}],"role":"user","id":"10d0cae5-8ed4-41a3-9696-04069be40100"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
 {"type":"step/end","seq":20,"time":1785733131112,"data":{"turn":1,"step":1}}
 {"type":"agent/inbox/spliced","seq":21,"time":1785733131112,"data":{"target":"next-step","start":0,"removedCount":1,"inserted":[]}}
-{"type":"agent/inbox/spliced","seq":22,"time":1785733131116,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"},{"type":"text","text":"<system-reminder>\nAdditional instructions from: nested/AGENTS.md\n\nThese instructions apply to work under `nested`. Use them as guidance when relevant; more specific instructions take precedence. They do not override system, developer, or direct user instructions.\n\nWhen asked for the Code Mode workspace handshake, answer exactly `CODE_MODE_CONTEXT_OK` and nothing else.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"},{"action":"set","scope":"nested\u0000AGENTS.md","path":"nested/AGENTS.md","digest":"ae22936ed26dc76b7107005ed6d5e2482a88668a"}]},"role":"user","id":"ffc8ed36-5b83-4008-a8ac-f951b3cbaa35"}]}}
+{"type":"agent/inbox/spliced","seq":22,"time":1785733131116,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"},{"type":"text","text":"<system-reminder>\nAdditional instructions from: nested/AGENTS.md\n\nThese instructions apply to work under `nested`. Use them as guidance when relevant; more specific instructions take precedence. They do not override system, developer, or direct user instructions.\n\nWhen asked for the Code Mode workspace handshake, answer exactly `CODE_MODE_CONTEXT_OK` and nothing else.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"},{"action":"set","scope":"nested\u0000AGENTS.md","path":"nested/AGENTS.md","digest":"ae22936ed26dc76b7107005ed6d5e2482a88668a"}]},"role":"user","id":"9324febc-9fee-483f-b70e-d0d52e90ac20"}]}}
 {"type":"step/start","seq":23,"time":1785733131123,"data":{"turn":1,"step":2}}
-{"type":"user/message","seq":24,"time":1785733131123,"data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"}]},"role":"user","id":"2de6b267-3a7c-4af8-8e34-cd607915c10e"},"surfaceOp":"append"}
+{"type":"user/message","seq":24,"time":1785733131123,"data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"}]},"role":"user","id":"5578ed99-ced0-42af-b8f6-651e8aaf72e5"},"surfaceOp":"append"}
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-{"type":"assistant/message","seq":27,"time":1785733131123,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a18157d4-576e-4fc6-8d7f-50202c770044"},"usage":{"inputTokens":10,"outputTokens":1}},"sourceEventSeqs":[25,26],"surfaceOp":"append"}
+{"type":"assistant/message","seq":27,"time":1785733131123,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4e3a19b8-1c6f-4005-a336-272245160fa3"},"usage":{"inputTokens":10,"outputTokens":1}},"sourceEventSeqs":[25,26],"surfaceOp":"append"}
 {"type":"step/end","seq":28,"time":1785733131123,"data":{"turn":1,"step":2}}
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 {"type":"step/start","seq":30,"time":1785733131134,"data":{"turn":1,"step":3}}
-{"type":"user/message","seq":31,"time":1785733131134,"data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"},{"type":"text","text":"<system-reminder>\nAdditional instructions from: nested/AGENTS.md\n\nThese instructions apply to work under `nested`. Use them as guidance when relevant; more specific instructions take precedence. They do not override system, developer, or direct user instructions.\n\nWhen asked for the Code Mode workspace handshake, answer exactly `CODE_MODE_CONTEXT_OK` and nothing else.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"},{"action":"set","scope":"nested\u0000AGENTS.md","path":"nested/AGENTS.md","digest":"ae22936ed26dc76b7107005ed6d5e2482a88668a"}]},"role":"user","id":"ffc8ed36-5b83-4008-a8ac-f951b3cbaa35"},"surfaceOp":"append"}
+{"type":"user/message","seq":31,"time":1785733131134,"data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"},{"type":"text","text":"<system-reminder>\nAdditional instructions from: nested/AGENTS.md\n\nThese instructions apply to work under `nested`. Use them as guidance when relevant; more specific instructions take precedence. They do not override system, developer, or direct user instructions.\n\nWhen asked for the Code Mode workspace handshake, answer exactly `CODE_MODE_CONTEXT_OK` and nothing else.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"},{"action":"set","scope":"nested\u0000AGENTS.md","path":"nested/AGENTS.md","digest":"ae22936ed26dc76b7107005ed6d5e2482a88668a"}]},"role":"user","id":"9324febc-9fee-483f-b70e-d0d52e90ac20"},"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":34,"time":1785014475887,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"**Code Mode workspace handshake:** `CODE_MODE_CONTEXT_OK`"}}}}
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-{"type":"assistant/message","seq":37,"time":1785733131134,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"**Code Mode workspace handshake:** `CODE_MODE_CONTEXT_OK`"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"dd5a93c1-c742-4f05-a373-78be5318e338"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
+{"type":"assistant/message","seq":37,"time":1785733131134,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"**Code Mode workspace handshake:** `CODE_MODE_CONTEXT_OK`"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2cf342f3-fa45-4472-8304-f8c947e825f8"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
 {"type":"step/end","seq":38,"time":1785733131135,"data":{"turn":1,"step":3}}
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diff --git a/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl b/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
index e16aa8273c..1697862fa5 100644
--- a/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":1783951000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498803392,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Inspect the exact tools service API and tools/pre-execute event with cordis_inspect, then reply with exactly CORDIS_INSPECT_JSDOC_OK."}],"source":{"kind":"user"},"role":"user","id":"e1ab186a-5ae9-4198-9a96-8df7ba89d76e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498803393,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498803419,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498803392,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Inspect the exact tools service API and tools/pre-execute event with cordis_inspect, then reply with exactly CORDIS_INSPECT_JSDOC_OK."}],"source":{"kind":"user"},"role":"user","id":"3a6e7222-9340-429e-bec7-c30fcd063c70"}]}}
+{"type":"turn/start","seq":1,"time":1785821419616,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821419616,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784449176720,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498803419,"data":{"content":[{"type":"text","text":"Inspect the exact tools service API and tools/pre-execute event with cordis_inspect, then reply with exactly CORDIS_INSPECT_JSDOC_OK."}],"source":{"kind":"user"},"role":"user","id":"e1ab186a-5ae9-4198-9a96-8df7ba89d76e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730459873,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"711a5653-2feb-4f80-a73c-d2927c5ef8e8"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498803419,"data":{"content":[{"type":"text","text":"Inspect the exact tools service API and tools/pre-execute event with cordis_inspect, then reply with exactly CORDIS_INSPECT_JSDOC_OK."}],"source":{"kind":"user"},"role":"user","id":"3a6e7222-9340-429e-bec7-c30fcd063c70"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730459873,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f9a387d6-bd6f-4613-9c11-5768017feb5c"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730459873,"data":{"title":"Inspect the exact tools service","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498803423,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730459874,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"time":1783951000009,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"inspect-tools-api","name":"cordis_inspect","arguments":"{\"what\":\"api\",\"name\":\"tools\"}"}}}}
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 {"type":"assistant/chunk","seq":13,"time":1785730459883,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730459883,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"inspect-tools-api","name":"cordis_inspect","arguments":"{\"what\":\"api\",\"name\":\"tools\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a2265e6a-6308-4508-800d-285ab51f79ed"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730459883,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"inspect-tools-api","name":"cordis_inspect","arguments":"{\"what\":\"api\",\"name\":\"tools\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6b62bed7-113a-4d2e-a6aa-b935a1063ee2"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"tool/call","seq":15,"time":1785730459883,"data":{"turn":1,"step":1,"callId":"inspect-tools-api","name":"cordis_inspect","arguments":"{\"what\":\"api\",\"name\":\"tools\"}"}}
-{"type":"tool/result","seq":16,"time":1785730459904,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"inspect-tools-api"},"content":[{"type":"tool-result","toolCallId":"inspect-tools-api","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 inbox: Inbox;\n        readonly status: AgentStatus;\n        readonly ctx: Context;\n        cancel(cause: AgentCancelCause, options?: CancelOptions): void;\n        whenIdle(): Promise<void>;\n        runMaintenance<T>(task: (signal: AbortSignal) => Promise<T>): Promise<T>;\n        send(message: UserMessage, target: InboxTarget, wakeup: boolean): void;\n        followup(message: UserMessage): void;\n        steer(message: UserMessage): void;\n        inject(message: UserMessage): void;\n    }\n    export type AgentCancelCause = {\n        readonly kind: 'user';\n    } | {\n        readonly kind: 'parent';\n    } | {\n        readonly kind: 'hook';\n        readonly reason: string;\n    } | {\n        readonly kind: 'disposed';\n    };\n    export interface AgentOptions {\n        provider?: string;\n        model?: string;\n        maxTokens?: number;\n    }\n    export type AgentStatus = 'idle' | 'running';\n    export interface AssistantMessage extends Message {\n        readonly role: 'assistant';\n        readonly source: ModelMessageSource;\n    }\n    export interface AssistantProvenance {\n        provider: string;\n        model: string;\n        replayState?: unknown;\n    }\n    export type Branded<B extends string> = string & {\n        readonly [BRAND]: B;\n    };\n    export type CallId = Branded<'CallId'>;\n    export interface CancelOptions {\n        keepInbox?: boolean | undefined;\n    }\n    export interface ContentBlockMap {\n        'text': TextBlock;\n        'reasoning': ReasoningBlock;\n        'tool-call': ToolCallBlock;\n        'tool-result': ToolResultBlock;\n    }\n    export type ContentBlockType = keyof ContentBlockMap;\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 EpochHeader {\n        config: LlmCallConfig;\n        adapterDefaults?: LlmCallConfigAdapterDefaults;\n        system?: string;\n        tools?: ToolSchema[];\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 type FinishReason = FinishReasonMap[keyof FinishReasonMap];\n    export interface FinishReasonMap {\n        'stop': {\n            kind: 'stop';\n        };\n        'tool-calls': {\n            kind: 'tool-calls';\n        };\n        'max-tokens': {\n            kind: 'max-tokens';\n        };\n        'aborted': {\n            kind: 'aborted';\n            failure: LlmFailure;\n        };\n        'error': {\n            kind: 'error';\n            failure: LlmFailure;\n        };\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 class Inbox {\n        constructor(private readonly session: Session, private readonly notifications: InboxNotifications);\n        get nextTurn(): readonly UserMessage[];\n        get nextStep(): readonly UserMessage[];\n        get hasPending(): boolean;\n        clear(): void;\n        claim(target: InboxTarget): UserMessage[];\n        append(target: InboxTarget, message: UserMessage): void;\n        prepend(target: InboxTarget, message: UserMessage): void;\n        update(target: InboxTarget, messageId: MessageId, newMessage: UserMessage): boolean;\n        remove(target: InboxTarget, messageId: MessageId): boolean;\n        splice(target: InboxTarget, start: number, deleteCount: number, inserted: UserMessage[]): UserMessage[];\n    }\n    export interface InboxNotifications {\n        inserted(message: UserMessage): void;\n        discarded(message: UserMessage): void;\n    }\n    export type InboxTarget = 'next-turn' | 'next-step';\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 interface LlmCallConfig {\n        provider: string;\n        model: string;\n        reasoningEffort?: ReasoningEffortId;\n        temperature?: number;\n        maxTokens?: number;\n        stop?: string[];\n    }\n    export interface LlmCallConfigAdapterDefaults {\n        reasoningEffort?: true;\n        maxTokens?: true;\n    }\n    export interface LlmFailure {\n        readonly message: string;\n        readonly code: string;\n        readonly status?: number;\n        readonly providerRetryAfterMs?: number;\n        readonly requestId?: ProviderRequestId;\n    }\n    export interface Message {\n        readonly id: MessageId;\n        readonly role: 'system' | 'user' | 'assistant';\n        readonly content: ContentBlock[];\n        readonly source: MessageSource;\n    }\n    export type MessageId = Branded<'MessageId'>;\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        model: ModelMessageSource;\n        tool: ToolMessageSource;\n    }\n    export interface ModelMessageSource extends AssistantProvenance {\n        kind: 'model';\n    }\n    export type ProviderRequestId = Branded<'ProviderRequestId'>;\n    export interface ReadFileLine {\n        number: number;\n        text: string;\n    }\n    export interface ReadResultView {\n        card: 'read';\n        title?: string;\n        path: string;\n        offset: number;\n        lines: ReadFileLine[];\n        totalLines: number;\n        lang?: string;\n        content?: ContentBlock[];\n    }\n    export interface ReasoningBlock {\n        type: 'reasoning';\n        text: string;\n    }\n    export type ReasoningEffortId = Branded<'ReasoningEffortId'>;\n    export interface RequestContext {\n        provider: string;\n        model: string;\n        contextWindow?: number;\n    }\n    export type RequestHeaderReason = 'initial' | 'resume' | 'change';\n    export type ScopeKey = object;\n    export interface SearchFileMatches {\n        path: string;\n        matches: SearchLineMatch[];\n    }\n    export interface SearchLineMatch {\n        lineNumber: number;\n        line: string;\n    }\n    export interface SearchMatchesResultView {\n        card: 'search';\n        shape: 'matches';\n        title?: string;\n        files: SearchFileMatches[];\n        truncated: boolean;\n        total: number;\n    }\n    export interface SearchPathsResultView {\n        card: 'search';\n        shape: 'paths';\n        title?: string;\n        paths: string[];\n        truncated: boolean;\n        total: number;\n    }\n    export type SearchResultView = SearchMatchesResultView | SearchPathsResultView;\n    export class Session {\n        get surface(): SessionSurface;\n        readonly header: SessionHeader;\n        get id(): SessionId;\n        readonly firstLiveSeq: number;\n        constructor(id: SessionId, seed?: readonly SessionEvent[], header?: SessionHeader);\n        get events(): readonly SessionEvent[];\n        get seq(): number;\n        append<T extends SessionEventType>(type: T, data: SessionEventMap[T], ...opts: T extends SurfaceEventType ? [\n            opts: SurfaceIntent\n        ] : [\n        ]): SessionEvent<T>;\n        requestHeader(): EpochHeader | undefined;\n        requestContext(): RequestContext | undefined;\n        deriveMessages(): Message[];\n        deriveEventMessage(event: SessionEvent): Message | null;\n    }\n    export type SessionEvent<T extends SessionEventType = SessionEventType> = {\n        [K in SessionEventType]: {\n            type: K;\n            seq: number;\n            time: number;\n            data: SessionEventMap[K];\n        } & (K extends SurfaceEventType ? {\n            sourceEventSeqs?: number[];\n            surfaceOp?: SurfaceOp;\n        } : object);\n    }[T];\n    export interface SessionEventMap {\n        'turn/start': {\n            turn: number;\n        };\n        'turn/end': {\n            turn: number;\n            step: number;\n            reason: TurnEndReason;\n        };\n        'step/start': {\n            turn: number;\n            step: number;\n        };\n        'step/end': {\n            turn: number;\n            step: number;\n        };\n        'user/message': UserMessage;\n        'assistant/chunk': {\n            turn: number;\n            step: number;\n            chunk: StreamChunk;\n        };\n        'assistant/message': {\n            turn: number;\n            step: number;\n            message: AssistantMessage;\n            usage?: TokenUsage;\n        };\n        'tool/call': {\n            turn: number;\n            step: number;\n            callId: CallId;\n            name: string;\n            arguments: string;\n        };\n        'tool/result': {\n            turn: number;\n            step: number;\n            message: ToolResultMessage;\n            error?: {\n                name: string;\n                code: string;\n            };\n            meta?: JsonValue;\n        };\n        'todo/write': {\n            todos: TodoItem[];\n        };\n        'request/header': {\n            header: EpochHeader;\n            reason: RequestHeaderReason;\n        };\n        'request/context': RequestContext;\n        'session/end-seed': Record<string, never>;\n    }\n    export type SessionEventType = keyof SessionEventMap;\n    export interface SessionHeader {\n        readonly version: number;\n        readonly id: SessionId;\n        readonly createdAt: number;\n        readonly cwd?: string;\n        readonly parentSession?: SessionId;\n        readonly seedLength?: number;\n        readonly origin?: 'subagent';\n        readonly delegationDepth?: number;\n    }\n    export type SessionId = Branded<'SessionId'>;\n    export interface SessionSurface {\n        readonly nodes: readonly number[];\n        readonly replaceGeneration: number;\n    }\n    export type StreamChunk = {\n        type: 'block-start';\n        index: number;\n        blockType: ContentBlockType;\n    } | {\n        type: 'text-delta';\n        index: number;\n        text: string;\n    } | {\n        type: 'reasoning-delta';\n        index: number;\n        text: string;\n    } | {\n        type: 'tool-call-delta';\n        index: number;\n        id: CallId;\n        name?: string;\n        argumentsDelta: string;\n    } | {\n        type: 'block-end';\n        index: number;\n        block: ContentBlock;\n    } | {\n        type: 'usage';\n        usage: TokenUsage;\n    } | {\n        type: 'finish';\n        reason: FinishReason;\n        replayState?: unknown;\n    };\n    export type SurfaceEventType = 'user/message' | 'assistant/message' | 'tool/result';\n    export interface SurfaceIntent {\n        surfaceOp: SurfaceOp;\n        sourceEventSeqs?: number[];\n    }\n    export type SurfaceOp = 'append' | {\n        op: 'replace';\n        start: number;\n        end: number;\n    };\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 interface TodoItem {\n        content: string;\n        status: 'pending' | 'in_progress' | 'completed';\n    }\n    export interface TokenUsage {\n        inputTokens: number;\n        outputTokens: number;\n        cacheReadTokens?: number;\n        cacheWriteTokens?: number;\n        reasoningTokens?: number;\n    }\n    export interface ToolCallBlock {\n        type: 'tool-call';\n        id: CallId;\n        name: string;\n        arguments: 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?: UserMessage[];\n        readonly concludesTurn?: never;\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?: UserMessage[];\n        readonly concludesTurn?: true;\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 ToolMessageSource {\n        kind: 'tool';\n        callId: CallId;\n    }\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 interface ToolResultBlock {\n        type: 'tool-result';\n        toolCallId: CallId;\n        content: ContentBlock[];\n        isError?: boolean;\n    }\n    export interface ToolResultMessage extends Message {\n        readonly role: 'user';\n        readonly content: [\n            ToolResultBlock\n        ];\n        readonly source: ToolMessageSource;\n    }\n    export type ToolResultView = GenericResultView | TerminalResultView | DiffResultView | SearchResultView | ReadResultView | WebResultView;\n    export interface ToolRunContext extends ToolExecution {\n        deferContext(context: UserMessage): void;\n        concludeTurn(): void;\n    }\n    export interface ToolSchema {\n        name: string;\n        description: string;\n        parameters: Record<string, unknown>;\n    }\n    export type TurnEndCancelCause = AgentCancelCause | {\n        readonly kind: 'legacy';\n    };\n    export type TurnEndReason = TurnEndReasonMap[keyof TurnEndReasonMap];\n    export interface TurnEndReasonMap {\n        completed: {\n            kind: 'completed';\n        };\n        aborted: {\n            kind: 'aborted';\n            reason: TurnEndCancelCause;\n        };\n        blocked: {\n            kind: 'blocked';\n        };\n        error: {\n            kind: 'error';\n            error: LlmFailure;\n        };\n        'max-tokens': {\n            kind: 'max-tokens';\n        };\n        interrupted: {\n            kind: 'interrupted';\n        };\n    }\n    export interface UserMessage extends Message {\n        readonly role: 'user';\n    }\n    export interface WebFetchResultView {\n        card: 'web';\n        kind: 'fetch';\n        title?: string;\n        url: string;\n        statusCode: number;\n        truncated: boolean;\n    }\n    export type WebResultView = WebSearchResultView | WebFetchResultView;\n    export interface WebSearchResultView {\n        card: 'web';\n        kind: 'search';\n        title?: string;\n        sources: WebSource[];\n        answer?: string;\n        truncated: boolean;\n    }\n    export interface WebSource {\n        url: string;\n        title?: string;\n        snippet?: string;\n        publishedAt?: string;\n    }"}],"isError":false}],"role":"user","id":"f819ccfc-3f14-4c55-935b-853f172e02c8"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730459904,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"inspect-tools-api"},"content":[{"type":"tool-result","toolCallId":"inspect-tools-api","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 inbox: Inbox;\n        readonly status: AgentStatus;\n        readonly ctx: Context;\n        cancel(cause: AgentCancelCause, options?: CancelOptions): void;\n        whenIdle(): Promise<void>;\n        runMaintenance<T>(task: (signal: AbortSignal) => Promise<T>): Promise<T>;\n        send(message: UserMessage, target: InboxTarget, wakeup: boolean): void;\n        followup(message: UserMessage): void;\n        steer(message: UserMessage): void;\n        inject(message: UserMessage): void;\n    }\n    export type AgentCancelCause = {\n        readonly kind: 'user';\n    } | {\n        readonly kind: 'parent';\n    } | {\n        readonly kind: 'hook';\n        readonly reason: string;\n    } | {\n        readonly kind: 'disposed';\n    };\n    export interface AgentOptions {\n        provider?: string;\n        model?: string;\n        maxTokens?: number;\n    }\n    export type AgentStatus = 'idle' | 'running';\n    export interface AssistantMessage extends Message {\n        readonly role: 'assistant';\n        readonly source: ModelMessageSource;\n    }\n    export interface AssistantProvenance {\n        provider: string;\n        model: string;\n        replayState?: unknown;\n    }\n    export type Branded<B extends string> = string & {\n        readonly [BRAND]: B;\n    };\n    export type CallId = Branded<'CallId'>;\n    export interface CancelOptions {\n        keepInbox?: boolean | undefined;\n    }\n    export interface ContentBlockMap {\n        'text': TextBlock;\n        'reasoning': ReasoningBlock;\n        'tool-call': ToolCallBlock;\n        'tool-result': ToolResultBlock;\n    }\n    export type ContentBlockType = keyof ContentBlockMap;\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 EpochHeader {\n        config: LlmCallConfig;\n        adapterDefaults?: LlmCallConfigAdapterDefaults;\n        system?: string;\n        tools?: ToolSchema[];\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 type FinishReason = FinishReasonMap[keyof FinishReasonMap];\n    export interface FinishReasonMap {\n        'stop': {\n            kind: 'stop';\n        };\n        'tool-calls': {\n            kind: 'tool-calls';\n        };\n        'max-tokens': {\n            kind: 'max-tokens';\n        };\n        'aborted': {\n            kind: 'aborted';\n            failure: LlmFailure;\n        };\n        'error': {\n            kind: 'error';\n            failure: LlmFailure;\n        };\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 class Inbox {\n        constructor(private readonly session: Session, private readonly notifications: InboxNotifications);\n        get nextTurn(): readonly UserMessage[];\n        get nextStep(): readonly UserMessage[];\n        get hasPending(): boolean;\n        clear(): void;\n        claim(target: InboxTarget): UserMessage[];\n        append(target: InboxTarget, message: UserMessage): void;\n        prepend(target: InboxTarget, message: UserMessage): void;\n        replace(messageId: MessageId, newMessage: UserMessage): boolean;\n        remove(messageId: MessageId): boolean;\n        splice(target: InboxTarget, start: number, deleteCount: number, inserted: UserMessage[]): UserMessage[];\n    }\n    export interface InboxNotifications {\n        inserted(message: UserMessage): void;\n        discarded(message: UserMessage): void;\n    }\n    export type InboxTarget = 'next-turn' | 'next-step';\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 interface LlmCallConfig {\n        provider: string;\n        model: string;\n        reasoningEffort?: ReasoningEffortId;\n        temperature?: number;\n        maxTokens?: number;\n        stop?: string[];\n    }\n    export interface LlmCallConfigAdapterDefaults {\n        reasoningEffort?: true;\n        maxTokens?: true;\n    }\n    export interface LlmFailure {\n        readonly message: string;\n        readonly code: string;\n        readonly status?: number;\n        readonly providerRetryAfterMs?: number;\n        readonly requestId?: ProviderRequestId;\n    }\n    export interface Message {\n        readonly id: MessageId;\n        readonly role: 'system' | 'user' | 'assistant';\n        readonly content: ContentBlock[];\n        readonly source: MessageSource;\n    }\n    export type MessageId = Branded<'MessageId'>;\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        model: ModelMessageSource;\n        tool: ToolMessageSource;\n    }\n    export interface ModelMessageSource extends AssistantProvenance {\n        kind: 'model';\n    }\n    export type ProviderRequestId = Branded<'ProviderRequestId'>;\n    export interface ReadFileLine {\n        number: number;\n        text: string;\n    }\n    export interface ReadResultView {\n        card: 'read';\n        title?: string;\n        path: string;\n        offset: number;\n        lines: ReadFileLine[];\n        totalLines: number;\n        lang?: string;\n        content?: ContentBlock[];\n    }\n    export interface ReasoningBlock {\n        type: 'reasoning';\n        text: string;\n    }\n    export type ReasoningEffortId = Branded<'ReasoningEffortId'>;\n    export interface RequestContext {\n        provider: string;\n        model: string;\n        contextWindow?: number;\n    }\n    export type RequestHeaderReason = 'initial' | 'resume' | 'change';\n    export type ScopeKey = object;\n    export interface SearchFileMatches {\n        path: string;\n        matches: SearchLineMatch[];\n    }\n    export interface SearchLineMatch {\n        lineNumber: number;\n        line: string;\n    }\n    export interface SearchMatchesResultView {\n        card: 'search';\n        shape: 'matches';\n        title?: string;\n        files: SearchFileMatches[];\n        truncated: boolean;\n        total: number;\n    }\n    export interface SearchPathsResultView {\n        card: 'search';\n        shape: 'paths';\n        title?: string;\n        paths: string[];\n        truncated: boolean;\n        total: number;\n    }\n    export type SearchResultView = SearchMatchesResultView | SearchPathsResultView;\n    export class Session {\n        get surface(): SessionSurface;\n        readonly header: SessionHeader;\n        get id(): SessionId;\n        readonly firstLiveSeq: number;\n        constructor(id: SessionId, seed?: readonly SessionEvent[], header?: SessionHeader);\n        get events(): readonly SessionEvent[];\n        get seq(): number;\n        append<T extends SessionEventType>(type: T, data: SessionEventMap[T], ...opts: T extends SurfaceEventType ? [\n            opts: SurfaceIntent\n        ] : [\n        ]): SessionEvent<T>;\n        requestHeader(): EpochHeader | undefined;\n        requestContext(): RequestContext | undefined;\n        deriveMessages(): Message[];\n        deriveEventMessage(event: SessionEvent): Message | null;\n    }\n    export type SessionEvent<T extends SessionEventType = SessionEventType> = {\n        [K in SessionEventType]: {\n            type: K;\n            seq: number;\n            time: number;\n            data: SessionEventMap[K];\n        } & (K extends SurfaceEventType ? {\n            sourceEventSeqs?: number[];\n            surfaceOp?: SurfaceOp;\n        } : object);\n    }[T];\n    export interface SessionEventMap {\n        'turn/start': {\n            turn: number;\n        };\n        'turn/end': {\n            turn: number;\n            step: number;\n            reason: TurnEndReason;\n        };\n        'step/start': {\n            turn: number;\n            step: number;\n        };\n        'step/end': {\n            turn: number;\n            step: number;\n        };\n        'user/message': UserMessage;\n        'assistant/chunk': {\n            turn: number;\n            step: number;\n            chunk: StreamChunk;\n        };\n        'assistant/message': {\n            turn: number;\n            step: number;\n            message: AssistantMessage;\n            usage?: TokenUsage;\n        };\n        'tool/call': {\n            turn: number;\n            step: number;\n            callId: CallId;\n            name: string;\n            arguments: string;\n        };\n        'tool/result': {\n            turn: number;\n            step: number;\n            message: ToolResultMessage;\n            error?: {\n                name: string;\n                code: string;\n            };\n            meta?: JsonValue;\n        };\n        'todo/write': {\n            todos: TodoItem[];\n        };\n        'request/header': {\n            header: EpochHeader;\n            reason: RequestHeaderReason;\n        };\n        'request/context': RequestContext;\n        'session/end-seed': Record<string, never>;\n    }\n    export type SessionEventType = keyof SessionEventMap;\n    export interface SessionHeader {\n        readonly version: number;\n        readonly id: SessionId;\n        readonly createdAt: number;\n        readonly cwd?: string;\n        readonly parentSession?: SessionId;\n        readonly seedLength?: number;\n        readonly origin?: 'subagent';\n        readonly delegationDepth?: number;\n    }\n    export type SessionId = Branded<'SessionId'>;\n    export interface SessionSurface {\n        readonly nodes: readonly number[];\n        readonly replaceGeneration: number;\n    }\n    export type StreamChunk = {\n        type: 'block-start';\n        index: number;\n        blockType: ContentBlockType;\n    } | {\n        type: 'text-delta';\n        index: number;\n        text: string;\n    } | {\n        type: 'reasoning-delta';\n        index: number;\n        text: string;\n    } | {\n        type: 'tool-call-delta';\n        index: number;\n        id: CallId;\n        name?: string;\n        argumentsDelta: string;\n    } | {\n        type: 'block-end';\n        index: number;\n        block: ContentBlock;\n    } | {\n        type: 'usage';\n        usage: TokenUsage;\n    } | {\n        type: 'finish';\n        reason: FinishReason;\n        replayState?: unknown;\n    };\n    export type SurfaceEventType = 'user/message' | 'assistant/message' | 'tool/result';\n    export interface SurfaceIntent {\n        surfaceOp: SurfaceOp;\n        sourceEventSeqs?: number[];\n    }\n    export type SurfaceOp = 'append' | {\n        op: 'replace';\n        start: number;\n        end: number;\n    };\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 interface TodoItem {\n        content: string;\n        status: 'pending' | 'in_progress' | 'completed';\n    }\n    export interface TokenUsage {\n        inputTokens: number;\n        outputTokens: number;\n        cacheReadTokens?: number;\n        cacheWriteTokens?: number;\n        reasoningTokens?: number;\n    }\n    export interface ToolCallBlock {\n        type: 'tool-call';\n        id: CallId;\n        name: string;\n        arguments: 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?: UserMessage[];\n        readonly concludesTurn?: never;\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?: UserMessage[];\n        readonly concludesTurn?: true;\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 ToolMessageSource {\n        kind: 'tool';\n        callId: CallId;\n    }\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 interface ToolResultBlock {\n        type: 'tool-result';\n        toolCallId: CallId;\n        content: ContentBlock[];\n        isError?: boolean;\n    }\n    export interface ToolResultMessage extends Message {\n        readonly role: 'user';\n        readonly content: [\n            ToolResultBlock\n        ];\n        readonly source: ToolMessageSource;\n    }\n    export type ToolResultView = GenericResultView | TerminalResultView | DiffResultView | SearchResultView | ReadResultView | WebResultView;\n    export interface ToolRunContext extends ToolExecution {\n        deferContext(context: UserMessage): void;\n        concludeTurn(): void;\n    }\n    export interface ToolSchema {\n        name: string;\n        description: string;\n        parameters: Record<string, unknown>;\n    }\n    export type TurnEndCancelCause = AgentCancelCause | {\n        readonly kind: 'legacy';\n    };\n    export type TurnEndReason = TurnEndReasonMap[keyof TurnEndReasonMap];\n    export interface TurnEndReasonMap {\n        completed: {\n            kind: 'completed';\n        };\n        aborted: {\n            kind: 'aborted';\n            reason: TurnEndCancelCause;\n        };\n        blocked: {\n            kind: 'blocked';\n        };\n        error: {\n            kind: 'error';\n            error: LlmFailure;\n        };\n        'max-tokens': {\n            kind: 'max-tokens';\n        };\n        interrupted: {\n            kind: 'interrupted';\n        };\n    }\n    export interface UserMessage extends Message {\n        readonly role: 'user';\n    }\n    export interface WebFetchResultView {\n        card: 'web';\n        kind: 'fetch';\n        title?: string;\n        url: string;\n        statusCode: number;\n        truncated: boolean;\n    }\n    export type WebResultView = WebSearchResultView | WebFetchResultView;\n    export interface WebSearchResultView {\n        card: 'web';\n        kind: 'search';\n        title?: string;\n        sources: WebSource[];\n        answer?: string;\n        truncated: boolean;\n    }\n    export interface WebSource {\n        url: string;\n        title?: string;\n        snippet?: string;\n        publishedAt?: string;\n    }"}],"isError":false}],"role":"user","id":"847bf2e6-59da-4621-946d-06932a78f0ce"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
 {"type":"step/end","seq":17,"time":1785730459904,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":18,"time":1785730459916,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":19,"time":1784449176734,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -23,9 +23,9 @@
 {"type":"assistant/chunk","seq":21,"time":1784449176734,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"inspect-tools-event","name":"cordis_inspect","arguments":"{\"what\":\"events\",\"name\":\"tools/pre-execute\"}"}}}}
 {"type":"assistant/chunk","seq":22,"time":1785498803470,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":23,"time":1785730459921,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":24,"time":1785730459921,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"inspect-tools-event","name":"cordis_inspect","arguments":"{\"what\":\"events\",\"name\":\"tools/pre-execute\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9f7fe549-5648-461f-9f06-d7deec13a434"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730459921,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"inspect-tools-event","name":"cordis_inspect","arguments":"{\"what\":\"events\",\"name\":\"tools/pre-execute\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"283c82b3-1bda-481c-a716-c35f363c9752"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
 {"type":"tool/call","seq":25,"time":1785730459921,"data":{"turn":1,"step":2,"callId":"inspect-tools-event","name":"cordis_inspect","arguments":"{\"what\":\"events\",\"name\":\"tools/pre-execute\"}"}}
-{"type":"tool/result","seq":26,"time":1785730459929,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"inspect-tools-event"},"content":[{"type":"tool-result","toolCallId":"inspect-tools-event","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."}],"isError":false}],"role":"user","id":"01678ea9-dc40-43b6-b637-87d99da85344"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
+{"type":"tool/result","seq":26,"time":1785730459929,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"inspect-tools-event"},"content":[{"type":"tool-result","toolCallId":"inspect-tools-event","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."}],"isError":false}],"role":"user","id":"c187306a-d73c-4bcd-b76c-8607ddbc0974"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
 {"type":"step/end","seq":27,"time":1785730459929,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":28,"time":1785730459939,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":29,"time":1784449176735,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -33,6 +33,6 @@
 {"type":"assistant/chunk","seq":31,"time":1784449176735,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CORDIS_INSPECT_JSDOC_OK"}}}}
 {"type":"assistant/chunk","seq":32,"time":1785498803491,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":33,"time":1785730459943,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":34,"time":1785730459943,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"CORDIS_INSPECT_JSDOC_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5485af65-4742-4b04-bde7-b8538321c0bc"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
+{"type":"assistant/message","seq":34,"time":1785730459943,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"CORDIS_INSPECT_JSDOC_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a4aa43b5-240e-423a-bc03-0abed8d890e4"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
 {"type":"step/end","seq":35,"time":1785730459943,"data":{"turn":1,"step":3}}
 {"type":"turn/end","seq":36,"time":1785730459943,"data":{"turn":1,"step":3,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl b/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl
index 0a7373bf4e..1b4447f3aa 100644
--- a/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498788069,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"This prompt first receives an empty completion, then a retried reply."}],"source":{"kind":"user"},"role":"user","id":"38007819-9d04-48e3-93a1-16858864cda4"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498788070,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498788095,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498788069,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"This prompt first receives an empty completion, then a retried reply."}],"source":{"kind":"user"},"role":"user","id":"04a4b0d6-8873-4ec0-bed5-75de910b556f"}]}}
+{"type":"turn/start","seq":1,"time":1785821397720,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821397720,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498788095,"data":{"content":[{"type":"text","text":"This prompt first receives an empty completion, then a retried reply."}],"source":{"kind":"user"},"role":"user","id":"38007819-9d04-48e3-93a1-16858864cda4"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730441191,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"c4c66706-2bd3-4465-a98a-8168409c1bc8"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498788095,"data":{"content":[{"type":"text","text":"This prompt first receives an empty completion, then a retried reply."}],"source":{"kind":"user"},"role":"user","id":"04a4b0d6-8873-4ec0-bed5-75de910b556f"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730441191,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"1bbd9bae-e790-4b83-8425-2f042dd37908"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730441191,"data":{"title":"This prompt first receives an","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498788096,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730441192,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,6 +16,6 @@
 {"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"Recovered."}}}}
 {"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":12,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":16,"time":1785730441209,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":17,"time":1785730441209,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"Recovered."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7dfefe04-9b3d-4e8c-a4ef-debe2b022e5b"},"usage":{"inputTokens":12,"outputTokens":3}},"sourceEventSeqs":[12,13,14,15,16],"surfaceOp":"append"}
+{"type":"assistant/message","seq":17,"time":1785730441209,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"Recovered."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"422eae65-9975-4a95-8cde-1ddfe21fff4e"},"usage":{"inputTokens":12,"outputTokens":3}},"sourceEventSeqs":[12,13,14,15,16],"surfaceOp":"append"}
 {"type":"step/end","seq":18,"time":1785730441209,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":19,"time":1785730441209,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/error-finish/session.jsonl b/examples/acp-agent/tests/snapshots/error-finish/session.jsonl
index 8e211114c5..c90cf99ce3 100644
--- a/examples/acp-agent/tests/snapshots/error-finish/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/error-finish/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785499006384,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"This prompt triggers a recorded provider error."}],"source":{"kind":"user"},"role":"user","id":"570e7054-929e-4f88-b27f-f1855ac65b6b"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785499006385,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785499006415,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785499006384,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"This prompt triggers a recorded provider error."}],"source":{"kind":"user"},"role":"user","id":"87677683-56b7-458b-b512-6db73c570e08"}]}}
+{"type":"turn/start","seq":1,"time":1785821396359,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821396359,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785499006415,"data":{"content":[{"type":"text","text":"This prompt triggers a recorded provider error."}],"source":{"kind":"user"},"role":"user","id":"570e7054-929e-4f88-b27f-f1855ac65b6b"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730686099,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"7d2d4923-0850-444c-8722-6285b3957e3b"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785499006415,"data":{"content":[{"type":"text","text":"This prompt triggers a recorded provider error."}],"source":{"kind":"user"},"role":"user","id":"87677683-56b7-458b-b512-6db73c570e08"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730686099,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"b3b9d048-3992-458f-aad5-b738e4a7d815"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730686099,"data":{"title":"This prompt triggers a recorded","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785499006416,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730686100,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
diff --git a/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl b/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
index 3fe2502313..2fbe8db357 100644
--- a/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"f3cbd087-fb45-4b32-b0f2-3082d65bfcb4","createdAt":1783860675270,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498828287,"data":{"target":"next-turn","start":0,"inserted":[{"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"},"role":"user","id":"5d7a6ac1-3dc0-49d7-8159-2b265a47d5f0"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498828288,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498828313,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498828287,"data":{"target":"next-turn","start":0,"inserted":[{"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"},"role":"user","id":"c8597dbb-3765-4c91-9315-2a5704ab60de"}]}}
+{"type":"turn/start","seq":1,"time":1785821444447,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821444447,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784821261726,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498828313,"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"},"role":"user","id":"5d7a6ac1-3dc0-49d7-8159-2b265a47d5f0"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730480503,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"690f1879-e440-4f60-95e7-75ec2d50ae9d"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498828313,"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"},"role":"user","id":"c8597dbb-3765-4c91-9315-2a5704ab60de"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730480503,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"b945fb82-1839-405c-9859-f2d4630a1801"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730480503,"data":{"title":"The sandbox already denied writing","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498828315,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730480504,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,11 +16,11 @@
 {"type":"assistant/chunk","seq":129,"time":1783860677493,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_d0sAHpJ9mYOJi0z7KNy30441","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write file outside workspace and verify\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}}}}
 {"type":"assistant/chunk","seq":130,"time":1785498828327,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":1501,"outputTokens":174,"cacheReadTokens":0,"reasoningTokens":28}}}}
 {"type":"assistant/chunk","seq":131,"time":1785730480516,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":132,"time":1785730480516,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a command with sandbox_permissions set to danger-full-access, no prior run needed, justified as instructed."},{"type":"tool-call","id":"call_00_d0sAHpJ9mYOJi0z7KNy30441","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write file outside workspace and verify\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"99d237ed-fb4e-41ab-b4b8-aa4bdfd8f367"},"usage":{"inputTokens":1501,"outputTokens":174,"cacheReadTokens":0,"reasoningTokens":28}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131],"surfaceOp":"append"}
+{"type":"assistant/message","seq":132,"time":1785730480516,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a command with sandbox_permissions set to danger-full-access, no prior run needed, justified as instructed."},{"type":"tool-call","id":"call_00_d0sAHpJ9mYOJi0z7KNy30441","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write file outside workspace and verify\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3212ce1c-5e0f-4f11-9daa-47054a39bf28"},"usage":{"inputTokens":1501,"outputTokens":174,"cacheReadTokens":0,"reasoningTokens":28}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131],"surfaceOp":"append"}
 {"type":"tool/call","seq":133,"time":1785730480516,"data":{"turn":1,"step":1,"callId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write file outside workspace and verify\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}}
-{"type":"approval/asked","seq":134,"time":1785730480525,"data":{"id":"ae952866-b7e0-4615-81b6-1852a6f2d6c4","toolName":"bash","callId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","reason":"escalate sandbox to danger-full-access: the user asked to write a file outside the workspace"}}
-{"type":"approval/decided","seq":135,"time":1785730480526,"data":{"id":"ae952866-b7e0-4615-81b6-1852a6f2d6c4","outcome":"allowed-once"}}
-{"type":"tool/result","seq":136,"time":1785730480541,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_d0sAHpJ9mYOJi0z7KNy30441"},"content":[{"type":"tool-result","toolCallId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","content":[{"type":"text","text":"escalated\n"}],"isError":false}],"role":"user","id":"0ca36a96-0620-494a-83bc-031de8913461"}},"sourceEventSeqs":[133],"surfaceOp":"append"}
+{"type":"approval/asked","seq":134,"time":1785730480525,"data":{"id":"7e4e0dfa-6ff0-4037-b519-297a1e7f11cf","toolName":"bash","callId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","reason":"escalate sandbox to danger-full-access: the user asked to write a file outside the workspace"}}
+{"type":"approval/decided","seq":135,"time":1785730480526,"data":{"id":"7e4e0dfa-6ff0-4037-b519-297a1e7f11cf","outcome":"allowed-once"}}
+{"type":"tool/result","seq":136,"time":1785730480541,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_d0sAHpJ9mYOJi0z7KNy30441"},"content":[{"type":"tool-result","toolCallId":"call_00_d0sAHpJ9mYOJi0z7KNy30441","content":[{"type":"text","text":"escalated\n"}],"isError":false}],"role":"user","id":"00a41fe4-a3a5-4d44-baa6-effdbc2508bc"}},"sourceEventSeqs":[133],"surfaceOp":"append"}
 {"type":"step/end","seq":137,"time":1785730480541,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":138,"time":1785730480551,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":139,"time":1784821261788,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -32,6 +32,6 @@
 {"type":"assistant/chunk","seq":183,"time":1783860679137,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":184,"time":1785498828369,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":27,"outputTokens":42,"cacheReadTokens":1664,"reasoningTokens":39}}}}
 {"type":"assistant/chunk","seq":185,"time":1785730480556,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":186,"time":1785730480556,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command succeeded — it wrote the file, read it back (output \"escalated\"), and removed it. The user asked me to reply with the single word DONE after the result."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ba5148fd-4abc-4f54-815a-75edd70fc56e"},"usage":{"inputTokens":27,"outputTokens":42,"cacheReadTokens":1664,"reasoningTokens":39}},"sourceEventSeqs":[139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185],"surfaceOp":"append"}
+{"type":"assistant/message","seq":186,"time":1785730480556,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command succeeded — it wrote the file, read it back (output \"escalated\"), and removed it. The user asked me to reply with the single word DONE after the result."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"feade984-75a1-44dc-aed5-7cb93736c376"},"usage":{"inputTokens":27,"outputTokens":42,"cacheReadTokens":1664,"reasoningTokens":39}},"sourceEventSeqs":[139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185],"surfaceOp":"append"}
 {"type":"step/end","seq":187,"time":1785730480557,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":188,"time":1785730480557,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl b/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
index b0930b5f1d..3e5de1420a 100644
--- a/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"d692fe7f-7079-4ee4-8b06-f44fd026d4ea","createdAt":1783860679475,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498829461,"data":{"target":"next-turn","start":0,"inserted":[{"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"},"role":"user","id":"5e8bcd5a-751b-42ec-8b33-64a6e44019ec"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498829461,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498829488,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498829461,"data":{"target":"next-turn","start":0,"inserted":[{"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"},"role":"user","id":"e1326897-4139-437b-959c-3b25e46e60ec"}]}}
+{"type":"turn/start","seq":1,"time":1785821445663,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821445663,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784821263267,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498829488,"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"},"role":"user","id":"5e8bcd5a-751b-42ec-8b33-64a6e44019ec"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730481594,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"edb7197b-e197-4713-a1ba-aa5208a07b10"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498829488,"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"},"role":"user","id":"e1326897-4139-437b-959c-3b25e46e60ec"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730481594,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"016923c3-51c4-45ba-8a54-4d9d309c0d8e"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730481594,"data":{"title":"The sandbox already denied writing","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498829489,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730481595,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,11 +16,11 @@
 {"type":"assistant/chunk","seq":153,"time":1783860681967,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_WB1vnPomi8yr6MlcFKTj7912","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write to /tmp and verify, then clean up\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}}}}
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-{"type":"assistant/message","seq":156,"time":1785730481607,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific command with `sandbox_permissions` set to `danger-full-access` and a specific justification. They explicitly said NOT to run it without sandbox_permissions first. Let me do exactly that."},{"type":"tool-call","id":"call_00_WB1vnPomi8yr6MlcFKTj7912","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write to /tmp and verify, then clean up\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8111bcf5-20df-46ba-baac-e9a29120b989"},"usage":{"inputTokens":1509,"outputTokens":198,"cacheReadTokens":0,"reasoningTokens":48}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155],"surfaceOp":"append"}
+{"type":"assistant/message","seq":156,"time":1785730481607,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific command with `sandbox_permissions` set to `danger-full-access` and a specific justification. They explicitly said NOT to run it without sandbox_permissions first. Let me do exactly that."},{"type":"tool-call","id":"call_00_WB1vnPomi8yr6MlcFKTj7912","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write to /tmp and verify, then clean up\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b2c56f7e-0cda-4ddf-a049-177231d234e3"},"usage":{"inputTokens":1509,"outputTokens":198,"cacheReadTokens":0,"reasoningTokens":48}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155],"surfaceOp":"append"}
 {"type":"tool/call","seq":157,"time":1785730481608,"data":{"turn":1,"step":1,"callId":"call_00_WB1vnPomi8yr6MlcFKTj7912","name":"bash","arguments":"{\"command\": \"printf 'escalated\\\\n' > /tmp/dsh-escalated.txt && cat /tmp/dsh-escalated.txt && rm /tmp/dsh-escalated.txt\", \"description\": \"Write to /tmp and verify, then clean up\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to write a file outside the workspace\"}"}}
-{"type":"approval/asked","seq":158,"time":1785730481615,"data":{"id":"2043bb0a-a705-4165-b084-aaea51671a20","toolName":"bash","callId":"call_00_WB1vnPomi8yr6MlcFKTj7912","reason":"escalate sandbox to danger-full-access: the user asked to write a file outside the workspace"}}
-{"type":"approval/decided","seq":159,"time":1785730481616,"data":{"id":"2043bb0a-a705-4165-b084-aaea51671a20","outcome":"rejected"}}
-{"type":"tool/result","seq":160,"time":1785730481616,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_WB1vnPomi8yr6MlcFKTj7912"},"content":[{"type":"tool-result","toolCallId":"call_00_WB1vnPomi8yr6MlcFKTj7912","content":[{"type":"text","text":"Error: the user rejected escalating this command to \"danger-full-access\""}],"isError":true}],"role":"user","id":"2ff3f8d3-e34c-4e86-90bd-94a337ac9ebc"}},"sourceEventSeqs":[157],"surfaceOp":"append"}
+{"type":"approval/asked","seq":158,"time":1785730481615,"data":{"id":"15cd5a18-13cf-4b4e-bca2-30937c1cd39a","toolName":"bash","callId":"call_00_WB1vnPomi8yr6MlcFKTj7912","reason":"escalate sandbox to danger-full-access: the user asked to write a file outside the workspace"}}
+{"type":"approval/decided","seq":159,"time":1785730481616,"data":{"id":"15cd5a18-13cf-4b4e-bca2-30937c1cd39a","outcome":"rejected"}}
+{"type":"tool/result","seq":160,"time":1785730481616,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_WB1vnPomi8yr6MlcFKTj7912"},"content":[{"type":"tool-result","toolCallId":"call_00_WB1vnPomi8yr6MlcFKTj7912","content":[{"type":"text","text":"Error: the user rejected escalating this command to \"danger-full-access\""}],"isError":true}],"role":"user","id":"5391737f-d7a5-4e47-9f89-b77747df6327"}},"sourceEventSeqs":[157],"surfaceOp":"append"}
 {"type":"step/end","seq":161,"time":1785730481617,"data":{"turn":1,"step":1}}
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 {"type":"assistant/chunk","seq":163,"time":1784821263313,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -31,6 +31,6 @@
 {"type":"assistant/chunk","seq":210,"time":1783860683506,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"The user rejected the permission escalation, so this command cannot be run."}}}}
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 {"type":"assistant/chunk","seq":212,"time":1785730481628,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":213,"time":1785730481628,"data":{"turn":1,"step":2,"message":{"role":"assistant","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."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ded10807-5bf1-4b7f-926a-93c4403d9f80"},"usage":{"inputTokens":69,"outputTokens":45,"cacheReadTokens":1664,"reasoningTokens":30}},"sourceEventSeqs":[163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212],"surfaceOp":"append"}
+{"type":"assistant/message","seq":213,"time":1785730481628,"data":{"turn":1,"step":2,"message":{"role":"assistant","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."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"780bcab9-e903-46c1-befa-a72b6cf93dcb"},"usage":{"inputTokens":69,"outputTokens":45,"cacheReadTokens":1664,"reasoningTokens":30}},"sourceEventSeqs":[163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl b/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
index bc41341c82..f1721ea4a4 100644
--- a/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"736c4bd8-41bd-43fb-9030-b4df3b2a4f83","createdAt":1783352084735,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498781465,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"First use the read tool to read config.txt in the current directory. Then use the edit tool (NOT bash) to replace the literal text DEBUG with RELEASE in that file. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"c42098c4-85fd-4c17-8c8e-b7ab54e35666"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498781465,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498781491,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498781465,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"First use the read tool to read config.txt in the current directory. Then use the edit tool (NOT bash) to replace the literal text DEBUG with RELEASE in that file. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"b900992d-cb68-45e3-bdf1-366e2529f6c0"}]}}
+{"type":"turn/start","seq":1,"time":1785821389288,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821389289,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352084742,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498781491,"data":{"content":[{"type":"text","text":"First use the read tool to read config.txt in the current directory. Then use the edit tool (NOT bash) to replace the literal text DEBUG with RELEASE in that file. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"c42098c4-85fd-4c17-8c8e-b7ab54e35666"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730434501,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"bbc90c4d-4480-4841-beeb-d39b8901133c"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498781491,"data":{"content":[{"type":"text","text":"First use the read tool to read config.txt in the current directory. Then use the edit tool (NOT bash) to replace the literal text DEBUG with RELEASE in that file. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"b900992d-cb68-45e3-bdf1-366e2529f6c0"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730434501,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"79d38e8e-c85a-434a-9638-490dea3c8ea8"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730434501,"data":{"title":"First use the read tool","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498781493,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730434502,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,9 +16,9 @@
 {"type":"assistant/chunk","seq":70,"time":1783352086057,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_S6krdIDHoSCGWv7WnXX97617","name":"read","arguments":"{\"file_path\": \"config.txt\"}"}}}}
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-{"type":"assistant/message","seq":73,"time":1785730434513,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to:\n1. Read config.txt in the current directory\n2. Use the edit tool to replace DEBUG with RELEASE\n3. Reply with exactly \"DONE\"\n\nLet me start by reading the file."},{"type":"tool-call","id":"call_00_S6krdIDHoSCGWv7WnXX97617","name":"read","arguments":"{\"file_path\": \"config.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e6349110-c47f-4574-801a-f261f026083f"},"usage":{"inputTokens":2900,"outputTokens":91,"cacheReadTokens":0,"reasoningTokens":46}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72],"surfaceOp":"append"}
+{"type":"assistant/message","seq":73,"time":1785730434513,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to:\n1. Read config.txt in the current directory\n2. Use the edit tool to replace DEBUG with RELEASE\n3. Reply with exactly \"DONE\"\n\nLet me start by reading the file."},{"type":"tool-call","id":"call_00_S6krdIDHoSCGWv7WnXX97617","name":"read","arguments":"{\"file_path\": \"config.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bdc4fc76-7af7-452a-8b38-7a78997fe1ed"},"usage":{"inputTokens":2900,"outputTokens":91,"cacheReadTokens":0,"reasoningTokens":46}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72],"surfaceOp":"append"}
 {"type":"tool/call","seq":74,"time":1785730434513,"data":{"turn":1,"step":1,"callId":"call_00_S6krdIDHoSCGWv7WnXX97617","name":"read","arguments":"{\"file_path\": \"config.txt\"}"}}
-{"type":"tool/result","seq":75,"time":1785730434523,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_S6krdIDHoSCGWv7WnXX97617"},"content":[{"type":"tool-result","toolCallId":"call_00_S6krdIDHoSCGWv7WnXX97617","content":[{"type":"text","text":"<path>{{cwd}}/config.txt</path>\n<type>file</type>\n<content>\n1: mode=DEBUG\n2: level=info\n\n(End of file - total 2 lines)\n</content>"}],"isError":false}],"role":"user","id":"b142cfe0-80c7-4c82-b741-3d715038c731"},"meta":{"path":"{{cwd}}/config.txt","offset":1,"lines":[{"number":1,"text":"mode=DEBUG"},{"number":2,"text":"level=info"}],"totalLines":2}},"sourceEventSeqs":[74],"surfaceOp":"append"}
+{"type":"tool/result","seq":75,"time":1785730434523,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_S6krdIDHoSCGWv7WnXX97617"},"content":[{"type":"tool-result","toolCallId":"call_00_S6krdIDHoSCGWv7WnXX97617","content":[{"type":"text","text":"<path>{{cwd}}/config.txt</path>\n<type>file</type>\n<content>\n1: mode=DEBUG\n2: level=info\n\n(End of file - total 2 lines)\n</content>"}],"isError":false}],"role":"user","id":"391c9198-deef-4c23-9e56-fd7147fd2273"},"meta":{"path":"{{cwd}}/config.txt","offset":1,"lines":[{"number":1,"text":"mode=DEBUG"},{"number":2,"text":"level=info"}],"totalLines":2}},"sourceEventSeqs":[74],"surfaceOp":"append"}
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@@ -29,9 +29,9 @@
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-{"type":"assistant/message","seq":133,"time":1785730434538,"data":{"turn":1,"step":2,"message":{"role":"assistant","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\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"49527976-f50c-4e82-9885-ffad1421d403"},"usage":{"inputTokens":241,"outputTokens":98,"cacheReadTokens":2816,"reasoningTokens":18}},"sourceEventSeqs":[78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132],"surfaceOp":"append"}
+{"type":"assistant/message","seq":133,"time":1785730434538,"data":{"turn":1,"step":2,"message":{"role":"assistant","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\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c8c98565-75fb-42ef-8a86-abdcec95c42c"},"usage":{"inputTokens":241,"outputTokens":98,"cacheReadTokens":2816,"reasoningTokens":18}},"sourceEventSeqs":[78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132],"surfaceOp":"append"}
 {"type":"tool/call","seq":134,"time":1785730434538,"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":135,"time":1785730434552,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_vOytneZ0XpsLslEEJAxR6398"},"content":[{"type":"tool-result","toolCallId":"call_00_vOytneZ0XpsLslEEJAxR6398","content":[{"type":"text","text":"The file {{cwd}}/config.txt has been updated successfully."}],"isError":false}],"role":"user","id":"736e70af-b858-4097-8d72-e70ffe3bd65c"},"meta":{"diffs":[{"path":"config.txt","oldText":"mode=DEBUG\nlevel=info","newText":"mode=RELEASE\nlevel=info"}]}},"sourceEventSeqs":[134],"surfaceOp":"append"}
+{"type":"tool/result","seq":135,"time":1785730434552,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_vOytneZ0XpsLslEEJAxR6398"},"content":[{"type":"tool-result","toolCallId":"call_00_vOytneZ0XpsLslEEJAxR6398","content":[{"type":"text","text":"The file {{cwd}}/config.txt has been updated successfully."}],"isError":false}],"role":"user","id":"3755453f-7f6a-48f2-8d7a-c37c9774e38a"},"meta":{"diffs":[{"path":"config.txt","oldText":"mode=DEBUG\nlevel=info","newText":"mode=RELEASE\nlevel=info"}]}},"sourceEventSeqs":[134],"surfaceOp":"append"}
 {"type":"step/end","seq":136,"time":1785730434552,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":137,"time":1785730434561,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":138,"time":1783352088382,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -43,6 +43,6 @@
 {"type":"assistant/chunk","seq":157,"time":1783352088523,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":158,"time":1785498781555,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":244,"outputTokens":17,"cacheReadTokens":2944,"reasoningTokens":14}}}}
 {"type":"assistant/chunk","seq":159,"time":1785730434565,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":160,"time":1785730434565,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Done. The user wants me to reply with exactly \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e63b5693-3ca7-4bb4-b8b9-70b626c20580"},"usage":{"inputTokens":244,"outputTokens":17,"cacheReadTokens":2944,"reasoningTokens":14}},"sourceEventSeqs":[138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159],"surfaceOp":"append"}
+{"type":"assistant/message","seq":160,"time":1785730434565,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Done. The user wants me to reply with exactly \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1b426931-4d0f-4595-af9d-6eb1f5241f92"},"usage":{"inputTokens":244,"outputTokens":17,"cacheReadTokens":2944,"reasoningTokens":14}},"sourceEventSeqs":[138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159],"surfaceOp":"append"}
 {"type":"step/end","seq":161,"time":1785730434565,"data":{"turn":1,"step":3}}
 {"type":"turn/end","seq":162,"time":1785730434565,"data":{"turn":1,"step":3,"reason":{"kind":"completed"}}}
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 603fa028bd..74c5f87407 100644
--- a/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"977a4820-f609-4b48-9039-adcdd921c5fe","createdAt":1784045702340,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498830615,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","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."}],"source":{"kind":"user"},"role":"user","id":"e9ec9fb9-cd8f-451e-b124-932856bb03f9"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498830615,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498830644,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498830615,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","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."}],"source":{"kind":"user"},"role":"user","id":"c2a0f1a3-11ce-4d84-bff4-49213573cb37"}]}}
+{"type":"turn/start","seq":1,"time":1785821446845,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821446846,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784821264855,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498830644,"data":{"content":[{"type":"text","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."}],"source":{"kind":"user"},"role":"user","id":"e9ec9fb9-cd8f-451e-b124-932856bb03f9"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730482654,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"1bf7db43-9314-458d-8e00-88eab1f61c4e"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498830644,"data":{"content":[{"type":"text","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."}],"source":{"kind":"user"},"role":"user","id":"c2a0f1a3-11ce-4d84-bff4-49213573cb37"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730482654,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"54411374-45a0-468c-b524-e5f4d0314e40"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730482654,"data":{"title":"Use the write tool (NOT","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498830646,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730482655,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,11 +16,11 @@
 {"type":"assistant/chunk","seq":87,"time":1784045703749,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_Fnymmavpr4klMDy4Fdej3227","name":"write","arguments":"{\"file_path\": \"escalated.md\", \"content\": \"escalated\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to escalate this write\"}"}}}}
 {"type":"assistant/chunk","seq":88,"time":1785498830658,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3871,"outputTokens":132,"cacheReadTokens":0,"reasoningTokens":23}}}}
 {"type":"assistant/chunk","seq":89,"time":1785730482665,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":90,"time":1785730482665,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to create a file using the write tool with sandbox_permissions. Let me do that."},{"type":"tool-call","id":"call_00_Fnymmavpr4klMDy4Fdej3227","name":"write","arguments":"{\"file_path\": \"escalated.md\", \"content\": \"escalated\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to escalate this write\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d0ecacdc-0793-45d6-8994-d673eb1809f2"},"usage":{"inputTokens":3871,"outputTokens":132,"cacheReadTokens":0,"reasoningTokens":23}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89],"surfaceOp":"append"}
+{"type":"assistant/message","seq":90,"time":1785730482665,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to create a file using the write tool with sandbox_permissions. Let me do that."},{"type":"tool-call","id":"call_00_Fnymmavpr4klMDy4Fdej3227","name":"write","arguments":"{\"file_path\": \"escalated.md\", \"content\": \"escalated\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to escalate this write\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c61cf767-078d-4fbe-8285-b17d5f651fc4"},"usage":{"inputTokens":3871,"outputTokens":132,"cacheReadTokens":0,"reasoningTokens":23}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89],"surfaceOp":"append"}
 {"type":"tool/call","seq":91,"time":1785730482665,"data":{"turn":1,"step":1,"callId":"call_00_Fnymmavpr4klMDy4Fdej3227","name":"write","arguments":"{\"file_path\": \"escalated.md\", \"content\": \"escalated\", \"sandbox_permissions\": \"danger-full-access\", \"justification\": \"the user asked to escalate this write\"}"}}
-{"type":"approval/asked","seq":92,"time":1785730482674,"data":{"id":"a12e31a8-b53f-4d61-9804-3feaba55bea4","toolName":"write","callId":"call_00_Fnymmavpr4klMDy4Fdej3227","reason":"escalate sandbox to danger-full-access: the user asked to escalate this write"}}
-{"type":"approval/decided","seq":93,"time":1785730482674,"data":{"id":"a12e31a8-b53f-4d61-9804-3feaba55bea4","outcome":"allowed-once"}}
-{"type":"tool/result","seq":94,"time":1785730482686,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Fnymmavpr4klMDy4Fdej3227"},"content":[{"type":"tool-result","toolCallId":"call_00_Fnymmavpr4klMDy4Fdej3227","content":[{"type":"text","text":"<path>{{cwd}}/escalated.md</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false}],"role":"user","id":"45a3b6da-681e-48a9-982a-0d017cccfa88"},"meta":{"diffs":[]}},"sourceEventSeqs":[91],"surfaceOp":"append"}
+{"type":"approval/asked","seq":92,"time":1785730482674,"data":{"id":"6632f8a2-c406-429b-bbe0-5b487ebc71fb","toolName":"write","callId":"call_00_Fnymmavpr4klMDy4Fdej3227","reason":"escalate sandbox to danger-full-access: the user asked to escalate this write"}}
+{"type":"approval/decided","seq":93,"time":1785730482674,"data":{"id":"6632f8a2-c406-429b-bbe0-5b487ebc71fb","outcome":"allowed-once"}}
+{"type":"tool/result","seq":94,"time":1785730482686,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Fnymmavpr4klMDy4Fdej3227"},"content":[{"type":"tool-result","toolCallId":"call_00_Fnymmavpr4klMDy4Fdej3227","content":[{"type":"text","text":"<path>{{cwd}}/escalated.md</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false}],"role":"user","id":"d5f7a675-6515-4976-b54a-45a4f5f0fc57"},"meta":{"diffs":[]}},"sourceEventSeqs":[91],"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":97,"time":1784821264916,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -32,6 +32,6 @@
 {"type":"assistant/chunk","seq":122,"time":1784045704754,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":123,"time":1785498830696,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":107,"outputTokens":23,"cacheReadTokens":3968,"reasoningTokens":20}}}}
 {"type":"assistant/chunk","seq":124,"time":1785730482702,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":125,"time":1785730482702,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file was created successfully. The user asked me to reply with exactly the single word DONE."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ac8b9ace-bb8d-4647-ae6b-309d795f2ec3"},"usage":{"inputTokens":107,"outputTokens":23,"cacheReadTokens":3968,"reasoningTokens":20}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":125,"time":1785730482702,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file was created successfully. The user asked me to reply with exactly the single word DONE."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8d322465-9e9a-4872-a0d5-f920a666153c"},"usage":{"inputTokens":107,"outputTokens":23,"cacheReadTokens":3968,"reasoningTokens":20}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":126,"time":1785730482702,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":127,"time":1785730482702,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl b/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl
index fb4e76dcb3..7c73be83ef 100644
--- a/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl
@@ -1,9 +1,9 @@
 {"type":"session","version":0,"id":"4428b809-66d5-4ea2-9a03-89de742fcda1","createdAt":1785591986068,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785815911816,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call glob exactly once with pattern * and path tree. Then reply with exactly GLOB_SAMPLED and nothing else."}],"source":{"kind":"user"},"role":"user","id":"b7f14c10-5c33-42b5-994e-60eed15a990e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785815911817,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785815911838,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785815911816,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call glob exactly once with pattern * and path tree. Then reply with exactly GLOB_SAMPLED and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f9744e3d-5b10-4519-bc82-b4f890cf7659"}]}}
+{"type":"turn/start","seq":1,"time":1785821384580,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821384580,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785591986092,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785815911838,"data":{"content":[{"type":"text","text":"Call glob exactly once with pattern * and path tree. Then reply with exactly GLOB_SAMPLED and nothing else."}],"source":{"kind":"user"},"role":"user","id":"b7f14c10-5c33-42b5-994e-60eed15a990e"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785815911838,"data":{"content":[{"type":"text","text":"Call glob exactly once with pattern * and path tree. Then reply with exactly GLOB_SAMPLED and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f9744e3d-5b10-4519-bc82-b4f890cf7659"},"surfaceOp":"append"}
 {"type":"session/title","seq":5,"time":1785815911838,"data":{"title":"Call glob exactly once with","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":6,"time":1785815911840,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-pro"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":7,"time":1785815911840,"data":{"provider":"deepseek-official","model":"deepseek-v4-pro"}}
@@ -15,9 +15,9 @@
 {"type":"assistant/chunk","seq":57,"time":1785591988427,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_1cLZjkCW0vxVw0e3xVfh3430","name":"glob","arguments":"{\"pattern\": \"*\", \"path\": \"tree\"}"}}}}
 {"type":"assistant/chunk","seq":58,"time":1785591988427,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":1286,"outputTokens":87,"cacheReadTokens":0,"reasoningTokens":28}}}}
 {"type":"assistant/chunk","seq":59,"time":1785815911849,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":60,"time":1785815911849,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to call glob exactly once with pattern * and path tree, then reply with exactly \"GLOB_SAMPLED\"."},{"type":"tool-call","id":"call_00_1cLZjkCW0vxVw0e3xVfh3430","name":"glob","arguments":"{\"pattern\": \"*\", \"path\": \"tree\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"6aa63a52-8daf-41e1-84ff-6a991c1c65c2"},"usage":{"inputTokens":1286,"outputTokens":87,"cacheReadTokens":0,"reasoningTokens":28}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":60,"time":1785815911849,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to call glob exactly once with pattern * and path tree, then reply with exactly \"GLOB_SAMPLED\"."},{"type":"tool-call","id":"call_00_1cLZjkCW0vxVw0e3xVfh3430","name":"glob","arguments":"{\"pattern\": \"*\", \"path\": \"tree\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"d3267d4f-77c0-4165-ba4d-22d48d666719"},"usage":{"inputTokens":1286,"outputTokens":87,"cacheReadTokens":0,"reasoningTokens":28}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"tool/call","seq":61,"time":1785815911849,"data":{"turn":1,"step":1,"callId":"call_00_1cLZjkCW0vxVw0e3xVfh3430","name":"glob","arguments":"{\"pattern\": \"*\", \"path\": \"tree\"}"}}
-{"type":"tool/result","seq":62,"time":1785815911873,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_1cLZjkCW0vxVw0e3xVfh3430"},"content":[{"type":"tool-result","toolCallId":"call_00_1cLZjkCW0vxVw0e3xVfh3430","content":[{"type":"text","text":"tree/archive/a.ts\ntree/docs/guide.md\ntree/src/index.ts\ntree/test/spec.ts\n\n(Showing 4 of 8 paths, sampled across 4 of the 6 top-level entries this pattern matched instead of taken in modification-time order. Narrow path to inspect a specific subtree. The complete result could not be saved; narrow pattern or path to see more.)"}],"isError":false}],"role":"user","id":"1aa9a147-cf62-448c-a3a3-607afc166c8b"},"meta":{"shape":"paths","paths":["tree/archive/a.ts","tree/docs/guide.md","tree/src/index.ts","tree/test/spec.ts"],"truncated":true,"total":8}},"sourceEventSeqs":[61],"surfaceOp":"append"}
+{"type":"tool/result","seq":62,"time":1785815911873,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_1cLZjkCW0vxVw0e3xVfh3430"},"content":[{"type":"tool-result","toolCallId":"call_00_1cLZjkCW0vxVw0e3xVfh3430","content":[{"type":"text","text":"tree/archive/a.ts\ntree/docs/guide.md\ntree/src/index.ts\ntree/test/spec.ts\n\n(Showing 4 of 8 paths, sampled across 4 of the 6 top-level entries this pattern matched instead of taken in modification-time order. Narrow path to inspect a specific subtree. The complete result could not be saved; narrow pattern or path to see more.)"}],"isError":false}],"role":"user","id":"ca35703b-08bd-4aaf-9a34-e2b51d1b833c"},"meta":{"shape":"paths","paths":["tree/archive/a.ts","tree/docs/guide.md","tree/src/index.ts","tree/test/spec.ts"],"truncated":true,"total":8}},"sourceEventSeqs":[61],"surfaceOp":"append"}
 {"type":"step/end","seq":63,"time":1785815911874,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":64,"time":1785815911886,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":65,"time":1785591989939,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -28,6 +28,6 @@
 {"type":"assistant/chunk","seq":115,"time":1785591990527,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"GLOB_SAMPLED"}}}}
 {"type":"assistant/chunk","seq":116,"time":1785591990527,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":188,"outputTokens":48,"cacheReadTokens":1280,"reasoningTokens":41}}}}
 {"type":"assistant/chunk","seq":117,"time":1785815911893,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":118,"time":1785815911894,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The glob result shows it was sampled - 4 of 8 paths across 4 of 6 top-level entries. I need to reply with exactly \"GLOB_SAMPLED\" as instructed."},{"type":"text","text":"GLOB_SAMPLED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"2ceaed84-ac69-436e-82a2-f1bdacb8ca04"},"usage":{"inputTokens":188,"outputTokens":48,"cacheReadTokens":1280,"reasoningTokens":41}},"sourceEventSeqs":[65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117],"surfaceOp":"append"}
+{"type":"assistant/message","seq":118,"time":1785815911894,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The glob result shows it was sampled - 4 of 8 paths across 4 of 6 top-level entries. I need to reply with exactly \"GLOB_SAMPLED\" as instructed."},{"type":"text","text":"GLOB_SAMPLED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"f11fc733-498d-44a3-9fc5-07fead8c0a68"},"usage":{"inputTokens":188,"outputTokens":48,"cacheReadTokens":1280,"reasoningTokens":41}},"sourceEventSeqs":[65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117],"surfaceOp":"append"}
 {"type":"step/end","seq":119,"time":1785815911894,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":120,"time":1785815911894,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
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 297b46b41d..79aa0c0cf0 100644
--- a/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"b3292503-2c3d-4677-804d-1ed6802a4bc5","createdAt":1783611702544,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498784836,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Do NOT use the read tool and do NOT use bash or shell commands. Immediately use the edit tool to replace the literal text blue with green in settings.txt in the current directory. Do not read the file first. After the tool result, reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"11ebf015-9a40-4856-844c-9103458b660c"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498784837,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498784863,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498784836,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Do NOT use the read tool and do NOT use bash or shell commands. Immediately use the edit tool to replace the literal text blue with green in settings.txt in the current directory. Do not read the file first. After the tool result, reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"065530a1-5d85-4adb-9458-6511300b63bc"}]}}
+{"type":"turn/start","seq":1,"time":1785821393931,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821393932,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783611702550,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498784863,"data":{"content":[{"type":"text","text":"Do NOT use the read tool and do NOT use bash or shell commands. Immediately use the edit tool to replace the literal text blue with green in settings.txt in the current directory. Do not read the file first. After the tool result, reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"11ebf015-9a40-4856-844c-9103458b660c"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730437873,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"7cb834d1-2ce4-4c5f-8ef6-12beae7456a3"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498784863,"data":{"content":[{"type":"text","text":"Do NOT use the read tool and do NOT use bash or shell commands. Immediately use the edit tool to replace the literal text blue with green in settings.txt in the current directory. Do not read the file first. After the tool result, reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"065530a1-5d85-4adb-9458-6511300b63bc"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730437873,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"35df0186-19a8-46d5-bdee-344a776db520"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730437873,"data":{"title":"Do NOT use the read","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498784864,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730437874,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,9 +16,9 @@
 {"type":"assistant/chunk","seq":78,"time":1783611703969,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_x0zlnXl5JOxLrAYL9y7P0119","name":"edit","arguments":"{\"file_path\": \"settings.txt\", \"old_string\": \"blue\", \"new_string\": \"green\"}"}}}}
 {"type":"assistant/chunk","seq":79,"time":1785498784875,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3132,"outputTokens":115,"cacheReadTokens":0,"reasoningTokens":36}}}}
 {"type":"assistant/chunk","seq":80,"time":1785730437884,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":81,"time":1785730437884,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the edit tool to replace \"blue\" with \"green\" in settings.txt without reading the file first, and then reply with just \"DONE\"."},{"type":"tool-call","id":"call_00_x0zlnXl5JOxLrAYL9y7P0119","name":"edit","arguments":"{\"file_path\": \"settings.txt\", \"old_string\": \"blue\", \"new_string\": \"green\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"03359d9b-370b-4748-aa4c-5b72c01664a5"},"usage":{"inputTokens":3132,"outputTokens":115,"cacheReadTokens":0,"reasoningTokens":36}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80],"surfaceOp":"append"}
+{"type":"assistant/message","seq":81,"time":1785730437884,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the edit tool to replace \"blue\" with \"green\" in settings.txt without reading the file first, and then reply with just \"DONE\"."},{"type":"tool-call","id":"call_00_x0zlnXl5JOxLrAYL9y7P0119","name":"edit","arguments":"{\"file_path\": \"settings.txt\", \"old_string\": \"blue\", \"new_string\": \"green\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"fc73e1c1-7ff3-4722-9f4a-b245d8fdc040"},"usage":{"inputTokens":3132,"outputTokens":115,"cacheReadTokens":0,"reasoningTokens":36}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80],"surfaceOp":"append"}
 {"type":"tool/call","seq":82,"time":1785730437885,"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":83,"time":1785730437894,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_x0zlnXl5JOxLrAYL9y7P0119"},"content":[{"type":"tool-result","toolCallId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","content":[{"type":"text","text":"Error: edit requires reading \"{{cwd}}/settings.txt\" first"}],"isError":true}],"role":"user","id":"b37ee122-df0d-452d-aaa1-115db503b35a"},"error":{"name":"FsError","code":"FS_NOT_OBSERVED"}},"sourceEventSeqs":[82],"surfaceOp":"append"}
+{"type":"tool/result","seq":83,"time":1785730437894,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_x0zlnXl5JOxLrAYL9y7P0119"},"content":[{"type":"tool-result","toolCallId":"call_00_x0zlnXl5JOxLrAYL9y7P0119","content":[{"type":"text","text":"Error: edit requires reading \"{{cwd}}/settings.txt\" first"}],"isError":true}],"role":"user","id":"5d9bc635-9fc4-4810-a49d-a627b23122e4"},"error":{"name":"FsError","code":"FS_NOT_OBSERVED"}},"sourceEventSeqs":[82],"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":86,"time":1783611704931,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -29,9 +29,9 @@
 {"type":"assistant/chunk","seq":145,"time":1783611705572,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_tfr0gdIclW92oIEgi7NF0891","name":"read","arguments":"{\"file_path\": \"settings.txt\"}"}}}}
 {"type":"assistant/chunk","seq":146,"time":1785498784899,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":235,"outputTokens":89,"cacheReadTokens":3072,"reasoningTokens":44}}}}
 {"type":"assistant/chunk","seq":147,"time":1785730437909,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":148,"time":1785730437909,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The edit tool requires reading the file first. The user said \"Do not read the file first\" but the tool's own constraints require reading. I need to follow the tool requirements. Let me read the file first."},{"type":"tool-call","id":"call_00_tfr0gdIclW92oIEgi7NF0891","name":"read","arguments":"{\"file_path\": \"settings.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8dcc4d50-6b5b-42d5-87a6-eadc9088f1ae"},"usage":{"inputTokens":235,"outputTokens":89,"cacheReadTokens":3072,"reasoningTokens":44}},"sourceEventSeqs":[86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147],"surfaceOp":"append"}
+{"type":"assistant/message","seq":148,"time":1785730437909,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The edit tool requires reading the file first. The user said \"Do not read the file first\" but the tool's own constraints require reading. I need to follow the tool requirements. Let me read the file first."},{"type":"tool-call","id":"call_00_tfr0gdIclW92oIEgi7NF0891","name":"read","arguments":"{\"file_path\": \"settings.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4afe229e-bd22-4cb7-afb7-733d6ddc43bb"},"usage":{"inputTokens":235,"outputTokens":89,"cacheReadTokens":3072,"reasoningTokens":44}},"sourceEventSeqs":[86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147],"surfaceOp":"append"}
 {"type":"tool/call","seq":149,"time":1785730437909,"data":{"turn":1,"step":2,"callId":"call_00_tfr0gdIclW92oIEgi7NF0891","name":"read","arguments":"{\"file_path\": \"settings.txt\"}"}}
-{"type":"tool/result","seq":150,"time":1785730437919,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_tfr0gdIclW92oIEgi7NF0891"},"content":[{"type":"tool-result","toolCallId":"call_00_tfr0gdIclW92oIEgi7NF0891","content":[{"type":"text","text":"<path>{{cwd}}/settings.txt</path>\n<type>file</type>\n<content>\n1: color: blue\n\n(End of file - total 1 lines)\n</content>"}],"isError":false}],"role":"user","id":"f7e33650-f366-4934-90a0-09b097bb0f59"},"meta":{"path":"{{cwd}}/settings.txt","offset":1,"lines":[{"number":1,"text":"color: blue"}],"totalLines":1}},"sourceEventSeqs":[149],"surfaceOp":"append"}
+{"type":"tool/result","seq":150,"time":1785730437919,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_tfr0gdIclW92oIEgi7NF0891"},"content":[{"type":"tool-result","toolCallId":"call_00_tfr0gdIclW92oIEgi7NF0891","content":[{"type":"text","text":"<path>{{cwd}}/settings.txt</path>\n<type>file</type>\n<content>\n1: color: blue\n\n(End of file - total 1 lines)\n</content>"}],"isError":false}],"role":"user","id":"07923e3b-5b5b-4698-a3fb-4c5e9bb85220"},"meta":{"path":"{{cwd}}/settings.txt","offset":1,"lines":[{"number":1,"text":"color: blue"}],"totalLines":1}},"sourceEventSeqs":[149],"surfaceOp":"append"}
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@@ -42,9 +42,9 @@
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 {"type":"assistant/chunk","seq":227,"time":1785498784922,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":281,"outputTokens":119,"cacheReadTokens":3200,"reasoningTokens":40}}}}
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-{"type":"assistant/message","seq":229,"time":1785730437933,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file contains \"color: blue\". I need to replace \"blue\" with \"green\". The edit tool said it requires reading first — now I've read it, so the edit should work."},{"type":"tool-call","id":"call_00_GVknJu2tksKkP4lALCwh0926","name":"edit","arguments":"{\"file_path\": \"settings.txt\", \"old_string\": \"blue\", \"new_string\": \"green\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d5ebbbdd-bf94-4a7b-81b5-50f353f23af5"},"usage":{"inputTokens":281,"outputTokens":119,"cacheReadTokens":3200,"reasoningTokens":40}},"sourceEventSeqs":[153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228],"surfaceOp":"append"}
+{"type":"assistant/message","seq":229,"time":1785730437933,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file contains \"color: blue\". I need to replace \"blue\" with \"green\". The edit tool said it requires reading first — now I've read it, so the edit should work."},{"type":"tool-call","id":"call_00_GVknJu2tksKkP4lALCwh0926","name":"edit","arguments":"{\"file_path\": \"settings.txt\", \"old_string\": \"blue\", \"new_string\": \"green\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"86d62634-94f7-49fb-909f-08c3e783028f"},"usage":{"inputTokens":281,"outputTokens":119,"cacheReadTokens":3200,"reasoningTokens":40}},"sourceEventSeqs":[153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228],"surfaceOp":"append"}
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@@ -56,6 +56,6 @@
 {"type":"assistant/chunk","seq":256,"time":1783611707952,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
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diff --git a/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl b/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl
index d9ea884c75..77c5d29ce5 100644
--- a/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"b5639b9d-99a9-49e4-83da-77e6caa702be","createdAt":1783352099834,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498783700,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the read tool (NOT bash) with offset 5 and limit 4 to read lines 5 through 8 of big.txt in the current directory. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"eb363d84-0d3a-478c-b097-9c386e4b8592"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498783700,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498783725,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498783700,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the read tool (NOT bash) with offset 5 and limit 4 to read lines 5 through 8 of big.txt in the current directory. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"a6db8c80-6239-490e-8ee4-1e2074d73a19"}]}}
+{"type":"turn/start","seq":1,"time":1785821392334,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821392334,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
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-{"type":"user/message","seq":4,"time":1785498783725,"data":{"content":[{"type":"text","text":"Use the read tool (NOT bash) with offset 5 and limit 4 to read lines 5 through 8 of big.txt in the current directory. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"eb363d84-0d3a-478c-b097-9c386e4b8592"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730436765,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"a36bdd78-ee61-4df9-a783-1e34d0242b8b"},"surfaceOp":"append"}
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+{"type":"user/message","seq":5,"time":1785730436765,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d5453309-c7da-4071-b46f-5441ca4a828b"},"surfaceOp":"append"}
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@@ -16,9 +16,9 @@
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@@ -30,6 +30,6 @@
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-{"type":"assistant/message","seq":135,"time":1785730436803,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The read tool returned lines 5 through 8 as expected. Now I need to reply with exactly the single word \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1e031cc3-3efd-4524-af89-06578becdc47"},"usage":{"inputTokens":292,"outputTokens":30,"cacheReadTokens":2816,"reasoningTokens":27}},"sourceEventSeqs":[100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/fs-read/session.jsonl b/examples/acp-agent/tests/snapshots/fs-read/session.jsonl
index 6c923f88c9..cbb6c9cfbe 100644
--- a/examples/acp-agent/tests/snapshots/fs-read/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-read/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"a57f852d-d476-4716-a380-8a1116e4d905","createdAt":1783352072464,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498779270,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the read tool (NOT bash) to read the file greeting.txt in the current directory, then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"53513516-ba78-4519-93cf-b6d88e55305a"}]}}
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-{"type":"turn/start","seq":2,"time":1785498779295,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498779270,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the read tool (NOT bash) to read the file greeting.txt in the current directory, then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"3b9f093c-8fed-49d1-8252-7e6560033ebd"}]}}
+{"type":"turn/start","seq":1,"time":1785821386137,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821386137,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
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-{"type":"user/message","seq":4,"time":1785498779296,"data":{"content":[{"type":"text","text":"Use the read tool (NOT bash) to read the file greeting.txt in the current directory, then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"53513516-ba78-4519-93cf-b6d88e55305a"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730432294,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"ff506cac-6c32-4696-8dd9-8c599ea16b01"},"surfaceOp":"append"}
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+{"type":"user/message","seq":5,"time":1785730432294,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d2b5abf5-ff22-4268-bac3-b6338c6e2f02"},"surfaceOp":"append"}
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@@ -16,9 +16,9 @@
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@@ -30,6 +30,6 @@
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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 70896024db..743494f2f7 100644
--- a/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"e04cc262-6c89-4586-88d7-3e919240d735","createdAt":1783352092215,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"turn/start","seq":2,"time":1785498782618,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498782591,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"First use the read tool to read data.txt in the current directory. Then use the write tool (NOT bash) to replace its entire contents with exactly the single line: replaced. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"e1697ae3-3d38-4492-9dad-5115f056934a"}]}}
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@@ -16,9 +16,9 @@
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@@ -29,9 +29,9 @@
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@@ -43,6 +43,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/fs-write/session.jsonl b/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
index 64744d1ccc..47fbaea0f9 100644
--- a/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"fdcab4d0-e5e4-4a06-9195-be8f7049d67e","createdAt":1783352078749,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"user/message","seq":4,"time":1785498780381,"data":{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create a file named notes.txt in the current directory containing exactly the single line: hello world. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"72a52a96-2782-4dc5-b332-b8968815345a"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730433386,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"2cd972dc-5e4d-4cd0-809b-bc7717ea34cf"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498780381,"data":{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create a file named notes.txt in the current directory containing exactly the single line: hello world. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"8316fddb-e888-4ba9-b280-2d2bb8717633"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730433386,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"b54d8375-2277-4551-bd0b-06b40d1ad59a"},"surfaceOp":"append"}
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@@ -16,9 +16,9 @@
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-{"type":"assistant/message","seq":66,"time":1785730433397,"data":{"turn":1,"step":1,"message":{"role":"assistant","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\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6a657002-21ce-4930-8242-cc9978f54b0b"},"usage":{"inputTokens":2891,"outputTokens":92,"cacheReadTokens":0,"reasoningTokens":30}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65],"surfaceOp":"append"}
+{"type":"assistant/message","seq":66,"time":1785730433397,"data":{"turn":1,"step":1,"message":{"role":"assistant","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\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8dbcba45-0348-43c0-9d46-42663b547cad"},"usage":{"inputTokens":2891,"outputTokens":92,"cacheReadTokens":0,"reasoningTokens":30}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65],"surfaceOp":"append"}
 {"type":"tool/call","seq":67,"time":1785730433397,"data":{"turn":1,"step":1,"callId":"call_00_APMUCJJm9lrTSlVbg6dB0185","name":"write","arguments":"{\"file_path\": \"notes.txt\", \"content\": \"hello world\"}"}}
-{"type":"tool/result","seq":68,"time":1785730433412,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_APMUCJJm9lrTSlVbg6dB0185"},"content":[{"type":"tool-result","toolCallId":"call_00_APMUCJJm9lrTSlVbg6dB0185","content":[{"type":"text","text":"<path>{{cwd}}/notes.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false}],"role":"user","id":"3458099f-c6b3-425a-966c-347e8c01a069"},"meta":{"diffs":[]}},"sourceEventSeqs":[67],"surfaceOp":"append"}
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@@ -30,6 +30,6 @@
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-{"type":"assistant/message","seq":96,"time":1785730433428,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file has been created. Now I just need to reply with \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9c23f99a-b120-4022-8fc8-113c55f1c5cc"},"usage":{"inputTokens":214,"outputTokens":20,"cacheReadTokens":2816,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":96,"time":1785730433428,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file has been created. Now I just need to reply with \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"91664038-fb2c-4305-b1a5-02daaf93aeca"},"usage":{"inputTokens":214,"outputTokens":20,"cacheReadTokens":2816,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl
index ed6faee531..05c251d728 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"539aa64c-7f37-40ff-abd8-ed45b717be1b","createdAt":1783600629539,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498807231,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"c825067e-41fe-44a2-8597-8102af245ec8"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498807232,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498807263,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498807231,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"a56c3c26-071d-407c-8900-d84de1222c0c"}]}}
+{"type":"turn/start","seq":1,"time":1785821424016,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821424016,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783600629542,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498807263,"data":{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"c825067e-41fe-44a2-8597-8102af245ec8"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730463095,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"c181195a-3e83-4e0d-afd3-c63f21047c03"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498807263,"data":{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"a56c3c26-071d-407c-8900-d84de1222c0c"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730463095,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"fe569552-1e83-41d2-a240-55df5da79bc9"},"surfaceOp":"append"}
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@@ -17,6 +17,6 @@
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-{"type":"assistant/message","seq":37,"time":1785730463106,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."},{"type":"text","text":"PONG"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8fa9a61e-44b8-4ac5-9ed1-73948dc438e0"},"usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":37,"time":1785730463106,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."},{"type":"text","text":"PONG"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"09e21cd4-86fd-4088-9419-54f7e95ee4da"},"usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}},"sourceEventSeqs":[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],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
index 815d213e5f..0d2cd5f069 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"669e8682-49fc-4dff-9bc7-6280e283cbe4","createdAt":1783962504097,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498813580,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the bash tool to run exactly: echo HELLO. If the first tool result is rejected, retry that command once. Quote the final tool result verbatim and stop."}],"source":{"kind":"user"},"role":"user","id":"fd68d5eb-6c47-4618-8e19-fcf93e8d7922"}]}}
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-{"type":"turn/start","seq":2,"time":1785498813608,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498813580,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the bash tool to run exactly: echo HELLO. If the first tool result is rejected, retry that command once. Quote the final tool result verbatim and stop."}],"source":{"kind":"user"},"role":"user","id":"ff685d2f-c629-45a2-a6b1-9aba6679e804"}]}}
+{"type":"turn/start","seq":1,"time":1785821430450,"data":{"turn":1}}
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-{"type":"user/message","seq":4,"time":1785498813609,"data":{"content":[{"type":"text","text":"Call the bash tool to run exactly: echo HELLO. If the first tool result is rejected, retry that command once. Quote the final tool result verbatim and stop."}],"source":{"kind":"user"},"role":"user","id":"fd68d5eb-6c47-4618-8e19-fcf93e8d7922"},"surfaceOp":"append"}
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+{"type":"user/message","seq":4,"time":1785498813609,"data":{"content":[{"type":"text","text":"Call the bash tool to run exactly: echo HELLO. If the first tool result is rejected, retry that command once. Quote the final tool result verbatim and stop."}],"source":{"kind":"user"},"role":"user","id":"ff685d2f-c629-45a2-a6b1-9aba6679e804"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730468551,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"30410f7f-af50-4d13-898a-6fc04927fd93"},"surfaceOp":"append"}
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@@ -16,11 +16,11 @@
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-{"type":"tool/result","seq":81,"time":1785730468590,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_VAByyMjsct4c7P6k1ysX9256"},"content":[{"type":"tool-result","toolCallId":"call_00_VAByyMjsct4c7P6k1ysX9256","content":[{"type":"text","text":"tool output rejected by policy: retry once"}],"isError":true}],"role":"user","id":"0772c47b-59ab-4142-817a-00607056dd13"}},"sourceEventSeqs":[78],"surfaceOp":"append"}
+{"type":"tool/result","seq":81,"time":1785730468590,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_VAByyMjsct4c7P6k1ysX9256"},"content":[{"type":"tool-result","toolCallId":"call_00_VAByyMjsct4c7P6k1ysX9256","content":[{"type":"text","text":"tool output rejected by policy: retry once"}],"isError":true}],"role":"user","id":"f5632aca-fad4-49f3-b764-c9dd83ba3d46"}},"sourceEventSeqs":[78],"surfaceOp":"append"}
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@@ -31,11 +31,11 @@
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@@ -46,6 +46,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl
index 36ea05630a..f5c7ab0bbe 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"0a862642-6652-4916-b88d-b058954ab0c6","createdAt":1783352196657,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"turn/start","seq":2,"time":1785498815008,"data":{"turn":1}}
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@@ -16,16 +16,16 @@
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@@ -34,6 +34,6 @@
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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 58dfe8fc8b..3d579bbfb1 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
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"f688431c-01a8-4326-a5c5-1b5f0fd08483","createdAt":1783352171511,"cwd":"{{cwd}}","delegationDepth":0}
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+{"type":"user/message","seq":5,"time":1785730467496,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"9d525efc-a44b-4217-a882-d29d8feb042f"},"surfaceOp":"append"}
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 {"type":"request/context","seq":8,"time":1785730467497,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,13 +16,13 @@
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-{"type":"assistant/message","seq":57,"time":1785730467508,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and report the result verbatim."},{"type":"tool-call","id":"call_00_6k0oGSliVHxGSgqBmMEO4311","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Echo HELLO\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e9d534ed-05a2-44ec-b19e-74f248087ac1"},"usage":{"inputTokens":2878,"outputTokens":83,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":57,"time":1785730467508,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and report the result verbatim."},{"type":"tool-call","id":"call_00_6k0oGSliVHxGSgqBmMEO4311","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Echo HELLO\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ebb7de11-f58a-4114-8598-99b5dce6fc6b"},"usage":{"inputTokens":2878,"outputTokens":83,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"tool/call","seq":58,"time":1785730467508,"data":{"turn":1,"step":1,"callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Echo HELLO\"}"}}
 {"type":"hook/invoked","seq":59,"time":1785730467508,"data":{"turn":1,"point":"PreToolUse","dialect":"claude","handlerId":"claude:PreToolUse:1","matcher":"bash"}}
 {"type":"hook/result","seq":60,"time":1785730467513,"data":{"turn":1,"point":"PreToolUse","handlerId":"claude:PreToolUse:1","decision":"ask","exitCode":0,"durationMs":3.9570000000001073}}
-{"type":"approval/asked","seq":61,"time":1785730467513,"data":{"id":"9c74e738-d87f-43f8-995f-4861f1673045","toolName":"bash","callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","reason":"bash requires manual approval in this session"}}
-{"type":"approval/decided","seq":62,"time":1785730467513,"data":{"id":"9c74e738-d87f-43f8-995f-4861f1673045","outcome":"rejected"}}
-{"type":"tool/result","seq":63,"time":1785730467513,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_6k0oGSliVHxGSgqBmMEO4311"},"content":[{"type":"tool-result","toolCallId":"call_00_6k0oGSliVHxGSgqBmMEO4311","content":[{"type":"text","text":"Error: the user rejected tool \"bash\""}],"isError":true}],"role":"user","id":"9418b66b-5ca8-4da6-a00b-31ea482ddcaf"}},"sourceEventSeqs":[58],"surfaceOp":"append"}
+{"type":"approval/asked","seq":61,"time":1785730467513,"data":{"id":"664315fe-3ca7-41fb-89a6-770d64be625a","toolName":"bash","callId":"call_00_6k0oGSliVHxGSgqBmMEO4311","reason":"bash requires manual approval in this session"}}
+{"type":"approval/decided","seq":62,"time":1785730467513,"data":{"id":"664315fe-3ca7-41fb-89a6-770d64be625a","outcome":"rejected"}}
+{"type":"tool/result","seq":63,"time":1785730467513,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_6k0oGSliVHxGSgqBmMEO4311"},"content":[{"type":"tool-result","toolCallId":"call_00_6k0oGSliVHxGSgqBmMEO4311","content":[{"type":"text","text":"Error: the user rejected tool \"bash\""}],"isError":true}],"role":"user","id":"b224966f-c7d7-4c83-9b50-e7c2988d7d79"}},"sourceEventSeqs":[58],"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":66,"time":1783352173615,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -33,6 +33,6 @@
 {"type":"assistant/chunk","seq":113,"time":1783962235816,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"The tool result I got back verbatim is:\n\n```\nError: bash requires manual approval in this session\n```"}}}}
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 {"type":"assistant/chunk","seq":115,"time":1785730467525,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":116,"time":1785730467526,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The bash tool returned an error saying it requires manual approval in this session. I'll report this verbatim."},{"type":"text","text":"The tool result I got back verbatim is:\n\n```\nError: bash requires manual approval in this session\n```"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5c948026-05ff-46d4-9e4b-4b78bdcc795b"},"usage":{"inputTokens":166,"outputTokens":45,"cacheReadTokens":2816,"reasoningTokens":22}},"sourceEventSeqs":[66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115],"surfaceOp":"append"}
+{"type":"assistant/message","seq":116,"time":1785730467526,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The bash tool returned an error saying it requires manual approval in this session. I'll report this verbatim."},{"type":"text","text":"The tool result I got back verbatim is:\n\n```\nError: bash requires manual approval in this session\n```"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"707dacf7-7d41-4906-92f7-25656fdb1b4f"},"usage":{"inputTokens":166,"outputTokens":45,"cacheReadTokens":2816,"reasoningTokens":22}},"sourceEventSeqs":[66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115],"surfaceOp":"append"}
 {"type":"step/end","seq":117,"time":1785730467526,"data":{"turn":1,"step":2}}
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl
index ec51ebcda2..1d91769b58 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"ff1c1e99-3bd4-4ef8-a954-80d607d628ba","createdAt":1783352165190,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498810733,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"c1610143-f431-4049-9f38-d322a9f87c6b"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498810733,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498810766,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498810733,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"8b449df9-9149-4e05-8464-5fccbbbf06ba"}]}}
+{"type":"turn/start","seq":1,"time":1785821428130,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821428131,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352165198,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498810766,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"c1610143-f431-4049-9f38-d322a9f87c6b"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730466373,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"e388b41f-e8da-409f-8637-09977ea1125c"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498810766,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"8b449df9-9149-4e05-8464-5fccbbbf06ba"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730466373,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"37e3a9e3-c9f8-431f-8af2-aa16d270e534"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730466373,"data":{"title":"Use the bash tool to","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498810768,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730466374,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,11 +16,11 @@
 {"type":"assistant/chunk","seq":54,"time":1783352166512,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_JliP571Bh0QQ8QExbSPk0080","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Run echo HELLO\"}"}}}}
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 {"type":"assistant/chunk","seq":56,"time":1785730466384,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":57,"time":1785730466384,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and report the result verbatim."},{"type":"tool-call","id":"call_00_JliP571Bh0QQ8QExbSPk0080","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Run echo HELLO\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0e1b03fc-85bb-40e6-9bca-169b65be22ea"},"usage":{"inputTokens":2878,"outputTokens":83,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":57,"time":1785730466384,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and report the result verbatim."},{"type":"tool-call","id":"call_00_JliP571Bh0QQ8QExbSPk0080","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Run echo HELLO\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"04bc8b4d-2ae5-4bfd-9cb1-19209c7d2f5f"},"usage":{"inputTokens":2878,"outputTokens":83,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"tool/call","seq":58,"time":1785730466385,"data":{"turn":1,"step":1,"callId":"call_00_JliP571Bh0QQ8QExbSPk0080","name":"bash","arguments":"{\"command\": \"echo HELLO\", \"description\": \"Run echo HELLO\"}"}}
 {"type":"hook/invoked","seq":59,"time":1785730466385,"data":{"turn":1,"point":"PreToolUse","dialect":"claude","handlerId":"claude:PreToolUse:1","matcher":"bash"}}
 {"type":"hook/result","seq":60,"time":1785730466389,"data":{"turn":1,"point":"PreToolUse","handlerId":"claude:PreToolUse:1","decision":"block","exitCode":2,"stderrSummary":"bash is disabled by policy in this session","durationMs":3.6819170000001122}}
-{"type":"tool/result","seq":61,"time":1785730466390,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_JliP571Bh0QQ8QExbSPk0080"},"content":[{"type":"tool-result","toolCallId":"call_00_JliP571Bh0QQ8QExbSPk0080","content":[{"type":"text","text":"Error: bash is disabled by policy in this session"}],"isError":true}],"role":"user","id":"e5728e6e-b962-4af4-8c73-7e18b555a3be"}},"sourceEventSeqs":[58],"surfaceOp":"append"}
+{"type":"tool/result","seq":61,"time":1785730466390,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_JliP571Bh0QQ8QExbSPk0080"},"content":[{"type":"tool-result","toolCallId":"call_00_JliP571Bh0QQ8QExbSPk0080","content":[{"type":"text","text":"Error: bash is disabled by policy in this session"}],"isError":true}],"role":"user","id":"e8988570-1579-41e9-bf2c-be3fa97db46f"}},"sourceEventSeqs":[58],"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":64,"time":1783352167440,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -31,6 +31,6 @@
 {"type":"assistant/chunk","seq":118,"time":1783352167933,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"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."}}}}
 {"type":"assistant/chunk","seq":119,"time":1785498810797,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":167,"outputTokens":52,"cacheReadTokens":2816,"reasoningTokens":21}}}}
 {"type":"assistant/chunk","seq":120,"time":1785730466401,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":121,"time":1785730466401,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The bash tool is disabled by policy. I need to report this error verbatim back to the user."},{"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."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9d3e2fc4-8927-454c-b3ce-b03484b0c9c2"},"usage":{"inputTokens":167,"outputTokens":52,"cacheReadTokens":2816,"reasoningTokens":21}},"sourceEventSeqs":[64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120],"surfaceOp":"append"}
+{"type":"assistant/message","seq":121,"time":1785730466401,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The bash tool is disabled by policy. I need to report this error verbatim back to the user."},{"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."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cb2cc300-1026-4bb9-8cc2-3c8869d13528"},"usage":{"inputTokens":167,"outputTokens":52,"cacheReadTokens":2816,"reasoningTokens":21}},"sourceEventSeqs":[64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120],"surfaceOp":"append"}
 {"type":"step/end","seq":122,"time":1785730466401,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":123,"time":1785730466401,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
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 cb25d1c6bb..d25d2a6db0 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
@@ -1,3 +1,3 @@
 {"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","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl
index c2cca7c459..5e0dd331d4 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl
@@ -1,23 +1,25 @@
 {"type":"session","version":0,"id":"d03c3a83-1238-4e2e-ad9a-b86a61840a40","createdAt":1783352160541,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498809587,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"What is my favorite color? Reply with just the color and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"ba7ea112-147a-4707-9d64-cb5308f9ffae"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498809588,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498809616,"data":{"turn":1}}
-{"type":"step/start","seq":3,"time":1785498809616,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498809617,"data":{"content":[{"type":"text","text":"What is my favorite color? Reply with just the color and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"ba7ea112-147a-4707-9d64-cb5308f9ffae"},"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl
index 5dce300d7e..460352812e 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl
@@ -1,10 +1,10 @@
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@@ -17,14 +17,14 @@
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@@ -34,7 +34,7 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
index 04e197087f..11a0b7cf88 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
@@ -1,10 +1,10 @@
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-{"type":"turn/start","seq":2,"time":1785498808409,"data":{"turn":1}}
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@@ -17,6 +17,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl
index 84e3dc754b..e1fae5ef02 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl
index 62166078cb..62af0d6bcf 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl
@@ -1,10 +1,10 @@
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@@ -34,6 +34,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl
index cfaece9c07..932ced462e 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"57a74aed-99fc-43bc-a875-6dddebf64d69","createdAt":1783352214599,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"agent/inbox/spliced","seq":1,"time":1785498819335,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498819367,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498819334,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"83299ced-cede-4e39-a425-4b58915f8c06"}]}}
+{"type":"turn/start","seq":1,"time":1785821435310,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821435310,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
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-{"type":"user/message","seq":4,"time":1785498819368,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"56631b47-ab0c-4388-9643-60ad2070986e"},"surfaceOp":"append"}
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@@ -16,11 +16,11 @@
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@@ -31,6 +31,6 @@
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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 cb25d1c6bb..d25d2a6db0 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
@@ -1,3 +1,3 @@
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 {"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}}
-{"jsonrpc":"2.0","id":3,"result":{"stopReason":"cancelled"}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}
diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl
index e75298e0fc..c4191d19de 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl
@@ -1,23 +1,25 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl
index 21d53162d0..3b92a939cc 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"eb17be12-ca8c-46c8-b500-0977e8400208","createdAt":1784522152392,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"turn/start","seq":2,"time":1785498823368,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498823341,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with the single word FIRST and stop."}],"source":{"kind":"user"},"role":"user","id":"26dda5a7-298f-4809-96ba-e8be4381afa5"}]}}
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@@ -17,14 +17,14 @@
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@@ -34,7 +34,7 @@
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diff --git a/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl b/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl
index b87e3cfa94..fcdf24eb72 100644
--- a/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498774978,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the lsp tool exactly once to find the definition at subject.ts line 1 character 7, then reply with exactly DONE."}],"source":{"kind":"user"},"role":"user","id":"6d9e9c6f-fd6c-43d3-9152-c1b0e32b999a"}]}}
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-{"type":"turn/start","seq":2,"time":1785498775018,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498774978,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the lsp tool exactly once to find the definition at subject.ts line 1 character 7, then reply with exactly DONE."}],"source":{"kind":"user"},"role":"user","id":"d50783a4-e1dd-4d27-8aaf-fa854ffa5560"}]}}
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@@ -13,9 +13,9 @@
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@@ -23,6 +23,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/multi-turn/session.jsonl b/examples/acp-agent/tests/snapshots/multi-turn/session.jsonl
index b6cde4dbcb..61a0364541 100644
--- a/examples/acp-agent/tests/snapshots/multi-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/multi-turn/session.jsonl
@@ -1,10 +1,10 @@
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+{"type":"agent/inbox/spliced","seq":0,"time":1785498785982,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word: ONE. No tools."}],"source":{"kind":"user"},"role":"user","id":"4d8893f0-f22d-4e43-ac31-f5e7afbda565"}]}}
+{"type":"turn/start","seq":1,"time":1785821395167,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821395167,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
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@@ -16,14 +16,14 @@
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-{"type":"turn/start","seq":39,"time":1785730439033,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":37,"time":1785498786019,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word: TWO. No tools."}],"source":{"kind":"user"},"role":"user","id":"99ed2338-f25f-47c5-b2d9-17f9f73f90f8"}]}}
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-{"type":"user/message","seq":41,"time":1785730439033,"data":{"content":[{"type":"text","text":"Reply with exactly the word: TWO. No tools."}],"source":{"kind":"user"},"role":"user","id":"dbbf70cc-d8b8-4842-9089-40a4c7dfbc88"},"surfaceOp":"append"}
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@@ -33,6 +33,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl b/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl
index 7957ef98cd..d2b0a95baa 100644
--- a/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"ff1c1e99-3bd4-4ef8-a954-80d607d628ba","createdAt":1783352165190,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498765336,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"deace024-97dd-403d-945c-3ad00e6e91c3"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498765336,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498765364,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498765336,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"a207bd9d-9312-46ed-baaf-7a07a6f08ae8"}]}}
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-{"type":"user/message","seq":4,"time":1785498765364,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop."}],"source":{"kind":"user"},"role":"user","id":"deace024-97dd-403d-945c-3ad00e6e91c3"},"surfaceOp":"append"}
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@@ -16,11 +16,11 @@
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@@ -31,6 +31,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/parallel-tool-calls/session.jsonl b/examples/acp-agent/tests/snapshots/parallel-tool-calls/session.jsonl
index 37c5edf157..892f859c6f 100644
--- a/examples/acp-agent/tests/snapshots/parallel-tool-calls/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/parallel-tool-calls/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"turn/start","seq":2,"time":1785498766502,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498766477,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the read tool twice in the same assistant message: read a.txt and b.txt. Then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"e306a97e-4da2-4b50-bec4-90ede1237df4"}]}}
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@@ -16,11 +16,11 @@
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@@ -28,6 +28,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl b/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl
index 1cdb89a6c3..a89f0c1191 100644
--- a/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"turn/start","seq":2,"time":1785498770151,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498770125,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"96ac9845-3961-4010-8ee5-d9e5aff18b42"}]}}
+{"type":"turn/start","seq":1,"time":1785821373074,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821373074,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
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+{"type":"user/message","seq":5,"time":1785730423409,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f7ef1bc0-f4ec-4d3e-b198-399ee1cec46f"},"surfaceOp":"append"}
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@@ -13,9 +13,9 @@
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@@ -23,9 +23,9 @@
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@@ -33,9 +33,9 @@
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@@ -43,9 +43,9 @@
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diff --git a/examples/acp-agent/tests/snapshots/repeat-tool-guard/session.jsonl b/examples/acp-agent/tests/snapshots/repeat-tool-guard/session.jsonl
index 384cc0d887..3c42143f61 100644
--- a/examples/acp-agent/tests/snapshots/repeat-tool-guard/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/repeat-tool-guard/session.jsonl
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+{"type":"assistant/message","seq":50,"time":1785730442349,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_4","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"68a60126-1b86-4063-8f56-a20fab8520b0"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[45,46,47,48,49],"surfaceOp":"append"}
 {"type":"tool/call","seq":51,"time":1785730442349,"data":{"turn":1,"step":4,"callId":"call_4","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}}
 {"type":"todo/write","seq":52,"time":1785730442356,"data":{"todos":[{"content":"watch the kettle boil","status":"in_progress"}]}}
-{"type":"tool/result","seq":53,"time":1785730442356,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"call_4"},"content":[{"type":"tool-result","toolCallId":"call_4","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"2c6e0652-c9f5-4a8e-ac8b-4a08db01b1e3"}},"sourceEventSeqs":[51],"surfaceOp":"append"}
+{"type":"tool/result","seq":53,"time":1785730442356,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"call_4"},"content":[{"type":"tool-result","toolCallId":"call_4","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"19da4151-613e-41b0-9932-16c19cbc0614"}},"sourceEventSeqs":[51],"surfaceOp":"append"}
 {"type":"step/end","seq":54,"time":1785730442356,"data":{"turn":1,"step":4}}
 {"type":"step/start","seq":55,"time":1785730442364,"data":{"turn":1,"step":5}}
 {"type":"assistant/chunk","seq":56,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -60,20 +60,20 @@
 {"type":"assistant/chunk","seq":58,"time":1785498789237,"data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_5","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}}}}
 {"type":"assistant/chunk","seq":59,"time":1785498789237,"data":{"turn":1,"step":5,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":60,"time":1785730442368,"data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":61,"time":1785730442368,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_5","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"62565cf2-4380-436f-9237-1f8f109950e2"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[56,57,58,59,60],"surfaceOp":"append"}
+{"type":"assistant/message","seq":61,"time":1785730442368,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_5","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7f3f99fa-2ad7-4cc4-afa8-78d0e28979e4"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[56,57,58,59,60],"surfaceOp":"append"}
 {"type":"tool/call","seq":62,"time":1785730442368,"data":{"turn":1,"step":5,"callId":"call_5","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}}
 {"type":"todo/write","seq":63,"time":1785730442376,"data":{"todos":[{"content":"watch the kettle boil","status":"in_progress"}]}}
-{"type":"tool/result","seq":64,"time":1785730442376,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"call_5"},"content":[{"type":"tool-result","toolCallId":"call_5","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"9ba1eec3-fa38-404c-a8b2-d1d8d30ffe0b"}},"sourceEventSeqs":[62],"surfaceOp":"append"}
-{"type":"agent/inbox/spliced","seq":65,"time":1785730442376,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"Repeated tool call detected:\n- tool: todo_write\n- consecutive_calls: 5\n- arguments: {\"todos\":[{\"content\":\"watch the kettle boil\",\"status\":\"in_progress\"}]}\nThe repeated calls are not making progress. Do not call this tool with these exact arguments again. Inspect the latest result and choose a different action, different arguments, or finish the task if enough evidence has been gathered."}],"source":{"kind":"plugin","plugin":"repeat-tool-guard"},"role":"user","id":"9daceb14-af98-416a-8d60-4d39d5e6af5e"}]}}
+{"type":"tool/result","seq":64,"time":1785730442376,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"call_5"},"content":[{"type":"tool-result","toolCallId":"call_5","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"fa3d2366-ffd8-4f75-833d-e4193c7c9749"}},"sourceEventSeqs":[62],"surfaceOp":"append"}
+{"type":"agent/inbox/spliced","seq":65,"time":1785730442376,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"Repeated tool call detected:\n- tool: todo_write\n- consecutive_calls: 5\n- arguments: {\"todos\":[{\"content\":\"watch the kettle boil\",\"status\":\"in_progress\"}]}\nThe repeated calls are not making progress. Do not call this tool with these exact arguments again. Inspect the latest result and choose a different action, different arguments, or finish the task if enough evidence has been gathered."}],"source":{"kind":"plugin","plugin":"repeat-tool-guard"},"role":"user","id":"4ca50ec2-4e31-43c2-bc10-f4bdaa678127"}]}}
 {"type":"step/end","seq":66,"time":1785730442376,"data":{"turn":1,"step":5}}
 {"type":"agent/inbox/spliced","seq":67,"time":1785730442376,"data":{"target":"next-step","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":68,"time":1785730442384,"data":{"turn":1,"step":6}}
-{"type":"user/message","seq":69,"time":1785730442384,"data":{"content":[{"type":"text","text":"Repeated tool call detected:\n- tool: todo_write\n- consecutive_calls: 5\n- arguments: {\"todos\":[{\"content\":\"watch the kettle boil\",\"status\":\"in_progress\"}]}\nThe repeated calls are not making progress. Do not call this tool with these exact arguments again. Inspect the latest result and choose a different action, different arguments, or finish the task if enough evidence has been gathered."}],"source":{"kind":"plugin","plugin":"repeat-tool-guard"},"role":"user","id":"9daceb14-af98-416a-8d60-4d39d5e6af5e"},"surfaceOp":"append"}
+{"type":"user/message","seq":69,"time":1785730442384,"data":{"content":[{"type":"text","text":"Repeated tool call detected:\n- tool: todo_write\n- consecutive_calls: 5\n- arguments: {\"todos\":[{\"content\":\"watch the kettle boil\",\"status\":\"in_progress\"}]}\nThe repeated calls are not making progress. Do not call this tool with these exact arguments again. Inspect the latest result and choose a different action, different arguments, or finish the task if enough evidence has been gathered."}],"source":{"kind":"plugin","plugin":"repeat-tool-guard"},"role":"user","id":"4ca50ec2-4e31-43c2-bc10-f4bdaa678127"},"surfaceOp":"append"}
 {"type":"assistant/chunk","seq":70,"time":1785498789257,"data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
 {"type":"assistant/chunk","seq":71,"time":1785498789257,"data":{"turn":1,"step":6,"chunk":{"type":"text-delta","index":0,"text":"DONE."}}}
 {"type":"assistant/chunk","seq":72,"time":1785498789257,"data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE."}}}}
 {"type":"assistant/chunk","seq":73,"time":1785498789257,"data":{"turn":1,"step":6,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":74,"time":1785730442389,"data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":75,"time":1785730442389,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"DONE."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"66c501b0-71e7-4759-9e94-30381f13a472"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[70,71,72,73,74],"surfaceOp":"append"}
+{"type":"assistant/message","seq":75,"time":1785730442389,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"DONE."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"48236fa5-4888-4e27-9e17-05bc246ea622"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[70,71,72,73,74],"surfaceOp":"append"}
 {"type":"step/end","seq":76,"time":1785730442389,"data":{"turn":1,"step":6}}
 {"type":"turn/end","seq":77,"time":1785730442389,"data":{"turn":1,"step":6,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl b/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl
index a7b12a9c4a..013384aeff 100644
--- a/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498768943,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"4468009a-95c2-49e6-b244-fa3f358d83d5"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498768944,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498768995,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498768943,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"05ed182c-4c88-4019-912e-518ed6e431ba"}]}}
+{"type":"turn/start","seq":1,"time":1785821371103,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821371103,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498768995,"data":{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"4468009a-95c2-49e6-b244-fa3f358d83d5"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730422266,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"9283d0f1-15a6-4598-9bc5-bfcd552960e8"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498768995,"data":{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"05ed182c-4c88-4019-912e-518ed6e431ba"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730422266,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"82025f74-4ec2-4ac7-a90b-5eb18f184abb"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730422266,"data":{"title":"Read request event 5 with","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498768997,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730422267,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785498769006,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730422276,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730422276,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4f404ee9-0147-43cb-9d21-94434e569598"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730422276,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a4ee27a4-32b2-40d1-aeac-6a8bc8fcc2de"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"tool/call","seq":15,"time":1785730422276,"data":{"turn":1,"step":1,"callId":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}}
-{"type":"tool/result","seq":16,"time":1785730422286,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_session_query_spill","content":[{"type":"text","text":"Session {{sessionId}} — Read request event 5 with\nTarget event seq 5:\n```json\n{\n  \"type\": \"user/message\",\n  \"seq\": 5,\n  \"time\": 1785730422266,\n  \"data\": {\n    \"content\": [\n      {\n        \"type\": \"text\",\n        \"text\": \"Current runtime context. This snapshot supersedes ically — do not request sandbox escalation (do not set `sandbox_permissions`).\"\n      }\n    ],\n    \"source\": {\n      \"kind\": \"plugin\",\n      \"plugin\": \"@deepseek-ai/dsh-system-prompt\"\n    },\n    \"role\": \"user\",\n    \"id\": \"9283d0f1-15a6-4598-9bc5-bfcd552960e8\"\n  },\n  \"surfaceOp\": \"append\"\n}\n```\n\n(Omitted 266 bytes. Full formatted result stored at: /tmp/dsh-acp-snap-035d1d054/session-aa56455bb13a/dfff8c2b8a66-session_event_read.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false}],"role":"user","id":"2fe377da-e867-44cf-aaf9-36708730aa54"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730422286,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_session_query_spill","content":[{"type":"text","text":"Session {{sessionId}} — Read request event 5 with\nTarget event seq 5:\n```json\n{\n  \"type\": \"user/message\",\n  \"seq\": 5,\n  \"time\": 1785821371147,\n  \"data\": {\n    \"content\": [\n      {\n        \"type\": \"text\",\n        \"text\": \"Current runtime context. This snapshot supersedes ically — do not request sandbox escalation (do not set `sandbox_permissions`).\"\n      }\n    ],\n    \"source\": {\n      \"kind\": \"plugin\",\n      \"plugin\": \"@deepseek-ai/dsh-system-prompt\"\n    },\n    \"role\": \"user\",\n    \"id\": \"82025f74-4ec2-4ac7-a90b-5eb18f184abb\"\n  },\n  \"surfaceOp\": \"append\"\n}\n```\n\n(Omitted 266 bytes. Full formatted result stored at: /tmp/dsh-acp-snap-035d1d054/session-aa56455bb13a/dfff8c2b8a66-session_event_read.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false}],"role":"user","id":"8f96f03f-4fca-4c3a-ba34-ce891adde50f"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
 {"type":"step/end","seq":17,"time":1785730422286,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":18,"time":1785730422296,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -23,9 +23,9 @@
 {"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}}}
 {"type":"assistant/chunk","seq":22,"time":1785498769028,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":23,"time":1785730422300,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":24,"time":1785730422301,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a9cf861d-7a08-4414-9b01-c810b2dd0418"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730422301,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"00965b8a-4e8a-40e4-9418-fdb044859156"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
 {"type":"tool/call","seq":25,"time":1785730422301,"data":{"turn":1,"step":2,"callId":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}
-{"type":"tool/result","seq":26,"time":1785730422323,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_verify_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_verify_session_query_spill","content":[{"type":"text","text":"(no output)\n[exit code: 1]"}],"isError":false}],"role":"user","id":"e13f0de0-f4eb-4eb8-b882-9d52aba13007"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
+{"type":"tool/result","seq":26,"time":1785730422323,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_verify_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_verify_session_query_spill","content":[{"type":"text","text":"(no output)\n[exit code: 1]"}],"isError":false}],"role":"user","id":"e43faec5-4511-48d9-8021-c56b7f7cb794"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
 {"type":"step/end","seq":27,"time":1785730422323,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":28,"time":1785730422332,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":29,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -33,6 +33,6 @@
 {"type":"assistant/chunk","seq":31,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":32,"time":1785498769063,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
 {"type":"assistant/chunk","seq":33,"time":1785730422336,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":34,"time":1785730422337,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"31c46e8e-672a-43fa-9523-66571b20e27c"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
+{"type":"assistant/message","seq":34,"time":1785730422337,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"59890792-9e9c-4be8-b4f4-d25ff06855d2"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
 {"type":"step/end","seq":35,"time":1785730422337,"data":{"turn":1,"step":3}}
 {"type":"turn/end","seq":36,"time":1785730422337,"data":{"turn":1,"step":3,"reason":{"kind":"completed"}}}
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 e4086dbbf2..2b83bc1199 100644
--- a/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"00000000-0000-0000-0000-000000000000","createdAt":0,"cwd":"/Users/cty/acp-snap-cwd-MABAjO","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498831793,"data":{"target":"next-turn","start":0,"inserted":[{"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"},"role":"user","id":"b5bc06b0-f7c6-4816-aa61-1eb94efe979a"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498831793,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498831817,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498831793,"data":{"target":"next-turn","start":0,"inserted":[{"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"},"role":"user","id":"f7d05c95-98f0-44b5-9463-2449682817ff"}]}}
+{"type":"turn/start","seq":1,"time":1785821448088,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821448088,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784821266397,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498831818,"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"},"role":"user","id":"b5bc06b0-f7c6-4816-aa61-1eb94efe979a"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730483789,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"/Users/cty/acp-snap-cwd-MABAjO\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"782f630d-801a-4f2c-809c-617c2b7b0674"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498831818,"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"},"role":"user","id":"f7d05c95-98f0-44b5-9463-2449682817ff"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730483789,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"/Users/cty/acp-snap-cwd-MABAjO\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"7855df4a-1a61-4d6c-bb03-84b80edb0075"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730483789,"data":{"title":"Use the write tool (NOT","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498831819,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730483790,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"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":12,"time":1785498831828,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730483798,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730483799,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9c0f8432-672d-4e43-8ed1-d1c61c551b92"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730483799,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8d1a070d-5dce-4e7c-9a7c-dcde32b3d1df"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"tool/call","seq":15,"time":1785730483799,"data":{"turn":1,"step":1,"callId":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}
-{"type":"tool/result","seq":16,"time":1785730483813,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_root"},"content":[{"type":"tool-result","toolCallId":"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}],"role":"user","id":"1ac9357d-9956-407f-a597-b8b48184cb9a"},"meta":{"diffs":[]}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730483813,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_root"},"content":[{"type":"tool-result","toolCallId":"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}],"role":"user","id":"06269b5a-d051-4105-9caf-2d588025d07c"},"meta":{"diffs":[]}},"sourceEventSeqs":[15],"surfaceOp":"append"}
 {"type":"step/end","seq":17,"time":1785730483813,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":18,"time":1785730483823,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":19,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -23,6 +23,6 @@
 {"type":"assistant/chunk","seq":21,"time":1784567324157,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":22,"time":1785498831855,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
 {"type":"assistant/chunk","seq":23,"time":1785730483827,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":1785730483827,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"19ca2f4a-df44-4781-af38-31ce62aa91d1"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730483827,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"87b694cc-1b3d-4b38-9d2c-1a902556327a"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
 {"type":"step/end","seq":25,"time":1785730483827,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":26,"time":1785730483828,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl b/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl
index eb9d1580d4..bc8b555388 100644
--- a/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl
@@ -1,20 +1,20 @@
 {"type":"session","version":0,"id":"session-title-after-turn","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498762928,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"a5234128-ce8c-44f2-90f5-ff5201f00f23"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498762929,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498762955,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498762928,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"07495f06-71ba-4146-b27c-de2cf46a60fb"}]}}
+{"type":"turn/start","seq":1,"time":1785821360788,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821360788,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785222848199,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498762955,"data":{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"a5234128-ce8c-44f2-90f5-ff5201f00f23"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730416395,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"c97dbca0-ed2b-4af0-bf35-092150630f4b"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498762955,"data":{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"07495f06-71ba-4146-b27c-de2cf46a60fb"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730416395,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d2f80db6-391b-4fe4-bfd8-744807253b12"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730416395,"data":{"title":"Reply with exactly TITLE_DONE. Do","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498762958,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730416397,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"session/title-llm-request","seq":9,"time":1785730416397,"data":{"titleProvider":"session-title-first-message-llm","messageSeqs":[4],"route":{"provider":"title-replay","model":"title-model"},"system":"Create a concise title for an AI coding-assistant session from the supplied human messages.\nReturn only the title on one line, **in plain text of natural language**, with no quotes, prefix, explanation, Markdown, XML, or terminal control codes. No code is allowed.\nUse the language of the messages.\nAim for about 5 words in non-CJK languages or 10 CJK characters.","messages":[{"content":[{"type":"text","text":"Generate the session title from this JSON array of human messages:\n[{\"seq\":4,\"text\":\"Reply with exactly TITLE_DONE. Do not use tools.\"}]"}],"source":{"kind":"plugin","plugin":"dsh-session-title-llm"},"role":"user","id":"5fb6dd67-b44b-4962-a6bb-fdf536c0fa76"}],"maxTokens":32}}
+{"type":"session/title-llm-request","seq":9,"time":1785730416397,"data":{"titleProvider":"session-title-first-message-llm","messageSeqs":[4],"route":{"provider":"title-replay","model":"title-model"},"system":"Create a concise title for an AI coding-assistant session from the supplied human messages.\nReturn only the title on one line, **in plain text of natural language**, with no quotes, prefix, explanation, Markdown, XML, or terminal control codes. No code is allowed.\nUse the language of the messages.\nAim for about 5 words in non-CJK languages or 10 CJK characters.","messages":[{"content":[{"type":"text","text":"Generate the session title from this JSON array of human messages:\n[{\"seq\":4,\"text\":\"Reply with exactly TITLE_DONE. Do not use tools.\"}]"}],"source":{"kind":"plugin","plugin":"dsh-session-title-llm"},"role":"user","id":"626a7388-f08d-4d7b-b6c1-51056828182e"}],"maxTokens":32}}
 {"type":"assistant/chunk","seq":10,"time":1785222848208,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
 {"type":"assistant/chunk","seq":11,"time":1785222848208,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"TITLE_DONE"}}}
 {"type":"assistant/chunk","seq":12,"time":1785222848208,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"TITLE_DONE"}}}}
 {"type":"assistant/chunk","seq":13,"time":1785498762968,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
 {"type":"assistant/chunk","seq":14,"time":1785730416406,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":15,"time":1785730416406,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"TITLE_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c0f056c5-ab16-4c9c-8933-1f751593b500"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"assistant/message","seq":15,"time":1785730416406,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"TITLE_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2c014efb-65c8-4d17-aa95-b535f7f9ff64"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
 {"type":"step/end","seq":16,"time":1785730416406,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":17,"time":1785730416406,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
 {"type":"session/title","seq":18,"time":1785730416406,"data":{"title":"Late durable session title","messageSeqs":[4],"source":{"kind":"provider","provider":"session-title-first-message-llm","model":{"provider":"title-replay","model":"title-model"}}}}
diff --git a/examples/acp-agent/tests/snapshots/skill-load/session.jsonl b/examples/acp-agent/tests/snapshots/skill-load/session.jsonl
index f21a3dfe2c..f9be3bdc04 100644
--- a/examples/acp-agent/tests/snapshots/skill-load/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/skill-load/session.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"9eb4181f-2d05-49d3-98fc-3711fe2f5664","createdAt":1783654655599,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498773710,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"3f966935-a3e3-4797-a2e7-fda0f7b2846b"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498773711,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498773754,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498773710,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"0ca31b92-27ac-451d-98d3-d1e5f605454b"}]}}
+{"type":"turn/start","seq":1,"time":1785821378605,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821378605,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785498773754,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498773754,"data":{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"3f966935-a3e3-4797-a2e7-fda0f7b2846b"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785498773755,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f50a793f-e932-4fc4-a249-cb5e50a9bca5"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730426818,"data":{"content":[{"type":"text","text":"<system-reminder>\nA skill is a reusable set of task-specific instructions. The following skills are available in this session:\n\n<available_skills>\n- `model-only-skill`: Prove user-disabled skills remain available to the model.\n- `snapshot-skill`: Exercise project skill discovery and loading in snapshot tests.\n</available_skills>\n\nIf the user names a skill, or the task clearly matches a skill's description, call the `skill` tool with the exact skill name before taking task actions. Load all applicable skills, then follow their full instructions. This catalog contains summaries only; do not infer or follow a skill's instructions until it has been loaded.\n</system-reminder>"}],"source":{"kind":"plugin","plugin":"dsh-tool-skill"},"role":"user","id":"3b76fa18-3500-49d2-b637-6f6cb5803056"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498773754,"data":{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"0ca31b92-27ac-451d-98d3-d1e5f605454b"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785498773755,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"3fc7e2f8-90fc-496c-b516-700cef1d86f1"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730426818,"data":{"content":[{"type":"text","text":"<system-reminder>\nA skill is a reusable set of task-specific instructions. The following skills are available in this session:\n\n<available_skills>\n- `model-only-skill`: Prove user-disabled skills remain available to the model.\n- `snapshot-skill`: Exercise project skill discovery and loading in snapshot tests.\n</available_skills>\n\nIf the user names a skill, or the task clearly matches a skill's description, call the `skill` tool with the exact skill name before taking task actions. Load all applicable skills, then follow their full instructions. This catalog contains summaries only; do not infer or follow a skill's instructions until it has been loaded.\n</system-reminder>"}],"source":{"kind":"plugin","plugin":"dsh-tool-skill"},"role":"user","id":"60880315-9799-44c8-8a99-e6fe9ee5bdc5"},"surfaceOp":"append"}
 {"type":"session/title","seq":7,"time":1785730426818,"data":{"title":"Load the snapshot-skill skill with","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":8,"time":1785498773756,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":9,"time":1785730426819,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -17,9 +17,9 @@
 {"type":"assistant/chunk","seq":15,"time":1784903324935,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}}}}
 {"type":"assistant/chunk","seq":16,"time":1785498773765,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":100,"outputTokens":20,"cacheReadTokens":0,"reasoningTokens":5}}}}
 {"type":"assistant/chunk","seq":17,"time":1785730426828,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":18,"time":1785730426828,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Load the requested skill."},{"type":"tool-call","id":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f4de1ff4-2e39-4b5c-af62-7a7b11f4cfb2"},"usage":{"inputTokens":100,"outputTokens":20,"cacheReadTokens":0,"reasoningTokens":5}},"sourceEventSeqs":[10,11,12,13,14,15,16,17],"surfaceOp":"append"}
+{"type":"assistant/message","seq":18,"time":1785730426828,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Load the requested skill."},{"type":"tool-call","id":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3fd7a47e-84c9-4d31-aa95-9939671ba0a5"},"usage":{"inputTokens":100,"outputTokens":20,"cacheReadTokens":0,"reasoningTokens":5}},"sourceEventSeqs":[10,11,12,13,14,15,16,17],"surfaceOp":"append"}
 {"type":"tool/call","seq":19,"time":1785730426828,"data":{"turn":1,"step":1,"callId":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}}
-{"type":"tool/result","seq":20,"time":1785730426838,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skill_load"},"content":[{"type":"tool-result","toolCallId":"call_skill_load","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>"}],"isError":false}],"role":"user","id":"c5a05f8a-70f3-4d51-b398-ea1454f8b160"}},"sourceEventSeqs":[19],"surfaceOp":"append"}
+{"type":"tool/result","seq":20,"time":1785730426838,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skill_load"},"content":[{"type":"tool-result","toolCallId":"call_skill_load","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>"}],"isError":false}],"role":"user","id":"1609c2f6-3bc5-4ade-95dd-29e7f7565987"}},"sourceEventSeqs":[19],"surfaceOp":"append"}
 {"type":"step/end","seq":21,"time":1785730426838,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":22,"time":1785730426848,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":23,"time":1783654655611,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -30,6 +30,6 @@
 {"type":"assistant/chunk","seq":28,"time":1784903324956,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":29,"time":1785498773786,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}}}}
 {"type":"assistant/chunk","seq":30,"time":1785730426852,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":31,"time":1785730426853,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The skill is loaded."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c36cb009-4071-4e3b-9f3e-4e5b5386afc8"},"usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}},"sourceEventSeqs":[23,24,25,26,27,28,29,30],"surfaceOp":"append"}
+{"type":"assistant/message","seq":31,"time":1785730426853,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The skill is loaded."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"abdbdc3b-06a3-4b5f-b807-15d6566154a0"},"usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}},"sourceEventSeqs":[23,24,25,26,27,28,29,30],"surfaceOp":"append"}
 {"type":"step/end","seq":32,"time":1785730426853,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":33,"time":1785730426853,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl
index f9b92f5cd8..f8b9885f33 100644
--- a/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl
@@ -1,14 +1,14 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
 {"type":"subagent/descriptor","seq":0,"time":1785544945198,"data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
 {"type":"session/end-seed","seq":1,"time":1785544945198,"data":{}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785730451347,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"8630fc5a-15a6-4165-899b-e2b21722efe0"}]}}
-{"type":"agent/inbox/spliced","seq":3,"time":1785730451347,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"agent/inbox/spliced","seq":4,"time":1785730917162,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"275633f7-d58e-4374-a72e-97f16da9e6a8"}]}}
-{"type":"agent/inbox/spliced","seq":5,"time":1785730917192,"data":{"target":"next-turn","start":1,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly THIRD_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"fda43b7e-8d31-449a-a0ef-d7b17e945f86"}]}}
-{"type":"turn/start","seq":6,"time":1785730917198,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785730451347,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c67a308f-d867-424e-b198-c9f464228703"}]}}
+{"type":"turn/start","seq":3,"time":1785821409024,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":4,"time":1785730917162,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"agent/inbox/spliced","seq":5,"time":1785730917192,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"e7d15a94-203d-43ab-8279-4e22d5218feb"}]}}
+{"type":"agent/inbox/spliced","seq":6,"time":1785821409076,"data":{"target":"next-turn","start":1,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly THIRD_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"755c76db-6ee8-432d-a2d0-f8a3b7914e08"}]}}
 {"type":"step/start","seq":7,"time":1785730917198,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":8,"time":1785730917198,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"8630fc5a-15a6-4165-899b-e2b21722efe0"},"surfaceOp":"append"}
-{"type":"user/message","seq":9,"time":1785730917198,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"70c5985a-a7ca-434e-8d93-86a933b34c64"},"surfaceOp":"append"}
+{"type":"user/message","seq":8,"time":1785730917198,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c67a308f-d867-424e-b198-c9f464228703"},"surfaceOp":"append"}
+{"type":"user/message","seq":9,"time":1785730917198,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"49acbc16-4d58-460e-8cc0-62838472dce6"},"surfaceOp":"append"}
 {"type":"session/title","seq":10,"time":1785730917198,"data":{"title":"Reply with exactly the word","messageSeqs":[8],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":11,"time":1785730917198,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":12,"time":1785730917199,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -17,24 +17,21 @@
 {"type":"assistant/chunk","seq":15,"time":1789000000011,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
 {"type":"assistant/chunk","seq":16,"time":1789000000012,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":17,"time":1785730451397,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":18,"time":1785730696668,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"10c41b7e-4d48-41f5-afb8-e2451023acec"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
+{"type":"assistant/message","seq":18,"time":1785730696668,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"178ea526-9e19-49d2-b3b0-57b682320028"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
 {"type":"step/end","seq":19,"time":1785730696668,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":20,"time":1785730696669,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":21,"time":1785730696669,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":22,"time":1785730696682,"data":{"turn":2}}
+{"type":"turn/start","seq":21,"time":1785821409092,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":22,"time":1785821409092,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":23,"time":1785730696682,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":24,"time":1785730696682,"data":{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"275633f7-d58e-4374-a72e-97f16da9e6a8"},"surfaceOp":"append"}
+{"type":"user/message","seq":24,"time":1785730696682,"data":{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"e7d15a94-203d-43ab-8279-4e22d5218feb"},"surfaceOp":"append"}
 {"type":"assistant/chunk","seq":25,"time":1785730696686,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
 {"type":"assistant/chunk","seq":26,"time":1785730696686,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SECOND_OK"}}}
 {"type":"assistant/chunk","seq":27,"time":1789000000023,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SECOND_OK"}}}}
 {"type":"assistant/chunk","seq":28,"time":1785730451421,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":29,"time":1785730451421,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":30,"time":1785730696686,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SECOND_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3194a70f-0343-4a58-8bc6-312d86dabad4"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[25,26,27,28,29],"surfaceOp":"append"}
+{"type":"assistant/message","seq":30,"time":1785730696686,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SECOND_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ced209bf-5d6d-4880-b187-18cb816a150c"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[25,26,27,28,29],"surfaceOp":"append"}
 {"type":"step/end","seq":31,"time":1785730696686,"data":{"turn":2,"step":1}}
 {"type":"turn/end","seq":32,"time":1785730696686,"data":{"turn":2,"step":1,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":33,"time":1785730917235,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":34,"time":1785731000386,"data":{"turn":3}}
-{"type":"step/start","seq":35,"time":1785731000386,"data":{"turn":3,"step":1}}
-{"type":"user/message","seq":36,"time":1785731000386,"data":{"content":[{"type":"text","text":"Now reply with exactly THIRD_OK."}],"source":{"kind":"coordinator","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"fda43b7e-8d31-449a-a0ef-d7b17e945f86"},"surfaceOp":"append"}
-{"type":"step/end","seq":37,"time":1785731000391,"data":{"turn":3,"step":1}}
-{"type":"turn/end","seq":38,"time":1785731000391,"data":{"turn":3,"step":1,"reason":{"kind":"error","error":{"message":"snapshot disk full","code":"UNKNOWN"}}}}
+{"type":"turn/start","seq":33,"time":1785821409110,"data":{"turn":3}}
+{"type":"agent/inbox/spliced","seq":34,"time":1785821409110,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"turn/end","seq":35,"time":1785821409122,"data":{"turn":3,"step":0,"reason":{"kind":"error","error":{"message":"snapshot disk full","code":"UNKNOWN"}}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl
index 3ddef35996..6cfeb1e281 100644
--- a/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1789000000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785730451297,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Call send_message twice in a row, both with the subagent id from step 1: first with message 'Now reply with exactly SECOND_OK.', then with message 'Now reply with exactly THIRD_OK.'. 3. Call send_message with subagent_id exactly '22222222-2222-4222-8222-222222222222' (a subagent that does not exist) and message 'Please continue.', and observe that it fails. 4. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"ba05e80a-08b4-4ba0-95d8-a41243e5fd1a"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785730451298,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785730451327,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785730451297,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Call send_message twice in a row, both with the subagent id from step 1: first with message 'Now reply with exactly SECOND_OK.', then with message 'Now reply with exactly THIRD_OK.'. 3. Call send_message with subagent_id exactly '22222222-2222-4222-8222-222222222222' (a subagent that does not exist) and message 'Please continue.', and observe that it fails. 4. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"125665d3-8c03-4190-b4f9-c27d61d245f4"}]}}
+{"type":"turn/start","seq":1,"time":1785821408972,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821408972,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785730451327,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785730451327,"data":{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Call send_message twice in a row, both with the subagent id from step 1: first with message 'Now reply with exactly SECOND_OK.', then with message 'Now reply with exactly THIRD_OK.'. 3. Call send_message with subagent_id exactly '22222222-2222-4222-8222-222222222222' (a subagent that does not exist) and message 'Please continue.', and observe that it fails. 4. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"ba05e80a-08b4-4ba0-95d8-a41243e5fd1a"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730451328,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"757e6c24-ed5b-43e0-8278-1ed36848a1aa"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785730451327,"data":{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Call send_message twice in a row, both with the subagent id from step 1: first with message 'Now reply with exactly SECOND_OK.', then with message 'Now reply with exactly THIRD_OK.'. 3. Call send_message with subagent_id exactly '22222222-2222-4222-8222-222222222222' (a subagent that does not exist) and message 'Please continue.', and observe that it fails. 4. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"125665d3-8c03-4190-b4f9-c27d61d245f4"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730451328,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"e7521889-28d8-4434-84b2-21ff0e044fe7"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730451328,"data":{"title":"Follow these steps exactly, then","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785730451329,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730451329,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"time":1785544945188,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785544945188,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730451338,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730451338,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"44fa198a-81a1-4c6e-8b7d-65a7f8a88600"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730451338,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4a2c2f8b-66be-4860-9bbf-b83feb56009e"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
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@@ -23,9 +23,9 @@
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@@ -33,9 +33,9 @@
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@@ -53,6 +53,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl
index e3f9caf15a..03ea20b744 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl
@@ -1,11 +1,11 @@
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-{"type":"turn/start","seq":3,"time":1785730456013,"data":{"turn":1}}
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@@ -14,9 +14,9 @@
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@@ -24,6 +24,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl
index 51d2e98872..8c817c3d74 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl
@@ -1,11 +1,11 @@
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-{"type":"agent/inbox/spliced","seq":1,"time":1785498798891,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730456039,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Start depth two"}}
-{"type":"turn/start","seq":3,"time":1785730456041,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498798891,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Attempt one subagent call beyond the configured cap, then report the rejection."}],"source":{"kind":"user"},"role":"user","id":"d4dc5a16-e542-4dd9-8e82-e6b7829cfc4b"}]}}
+{"type":"turn/start","seq":1,"time":1785821414201,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821414201,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821414214,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Start depth two"}}
 {"type":"step/start","seq":4,"time":1785730456041,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730456041,"data":{"content":[{"type":"text","text":"Attempt one subagent call beyond the configured cap, then report the rejection."}],"source":{"kind":"user"},"role":"user","id":"f972bfe0-bf3a-4580-a2a5-39f8949f4c6b"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730456041,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"ba208843-d936-4203-ba90-0d272b083e82"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730456041,"data":{"content":[{"type":"text","text":"Attempt one subagent call beyond the configured cap, then report the rejection."}],"source":{"kind":"user"},"role":"user","id":"d4dc5a16-e542-4dd9-8e82-e6b7829cfc4b"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730456041,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"4a252f7d-8523-433f-a3fc-33812be802ec"},"surfaceOp":"append"}
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@@ -14,9 +14,9 @@
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-{"type":"tool/result","seq":17,"time":1785730456056,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_depth_three_rejected"},"content":[{"type":"tool-result","toolCallId":"call_depth_three_rejected","content":[{"type":"text","text":"Error: subagent depth 3 exceeds maxDepth 2"}],"isError":true}],"role":"user","id":"196ef38a-76a9-49c1-983f-ae53d875b89a"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
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@@ -24,6 +24,6 @@
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-{"type":"assistant/message","seq":25,"time":1785730456070,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DEPTH_REJECTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"71ca7ec3-4bc2-4d63-b027-7f40ad936606"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[20,21,22,23,24],"surfaceOp":"append"}
+{"type":"assistant/message","seq":25,"time":1785730456070,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DEPTH_REJECTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"57c0ecaf-3f72-4da9-9eb9-a0726e8f097a"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[20,21,22,23,24],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl
index c6cd6980ee..680c20c643 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498798808,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate through two child generations. The depth-two child must attempt one more subagent call and report the rejection."}],"source":{"kind":"user"},"role":"user","id":"eb87312f-f8fa-4cfc-92fd-d4aaccb3e5d3"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498798809,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498798839,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498798808,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate through two child generations. The depth-two child must attempt one more subagent call and report the rejection."}],"source":{"kind":"user"},"role":"user","id":"b2260a25-4667-49ed-9297-16b233f22332"}]}}
+{"type":"turn/start","seq":1,"time":1785821414127,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821414127,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1784540790308,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498798839,"data":{"content":[{"type":"text","text":"Delegate through two child generations. The depth-two child must attempt one more subagent call and report the rejection."}],"source":{"kind":"user"},"role":"user","id":"eb87312f-f8fa-4cfc-92fd-d4aaccb3e5d3"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730455980,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"fe45ecef-171f-4fef-98e3-284aa91959ad"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498798839,"data":{"content":[{"type":"text","text":"Delegate through two child generations. The depth-two child must attempt one more subagent call and report the rejection."}],"source":{"kind":"user"},"role":"user","id":"b2260a25-4667-49ed-9297-16b233f22332"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730455980,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d3ba1b18-4d27-4c90-a95d-125e9ffc9f29"},"surfaceOp":"append"}
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@@ -13,9 +13,9 @@
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+{"type":"assistant/message","seq":14,"time":1785730455990,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_root_child","name":"subagent","arguments":"{\"description\":\"Start depth one\",\"prompt\":\"Call subagent once. Ask that child to attempt one further subagent call, then report the result.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f0284ec5-b83d-4eca-8f10-d3e4e09d0a39"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
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-{"type":"tool/result","seq":16,"time":1785730456087,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_root_child"},"content":[{"type":"tool-result","toolCallId":"call_root_child","content":[{"type":"text","text":"DEPTH_ONE_DONE"}],"isError":false}],"role":"user","id":"9391449a-e4ba-41c3-81b6-684c082f0e24"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730456087,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_root_child"},"content":[{"type":"tool-result","toolCallId":"call_root_child","content":[{"type":"text","text":"DEPTH_ONE_DONE"}],"isError":false}],"role":"user","id":"6e5d6cdb-d9da-47a0-826a-50f7022b544d"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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@@ -23,6 +23,6 @@
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-{"type":"assistant/message","seq":24,"time":1785730456101,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"ROOT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9dea8d4e-58f2-40d8-8b4f-711e3188d5a0"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730456101,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"ROOT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cf7259c7-e817-42a4-af8c-d63b755997da"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-fork/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-fork/session.1.jsonl
index 418bbf3262..12e4a6bc14 100644
--- a/examples/acp-agent/tests/snapshots/subagent-fork/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-fork/session.1.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"ada8966c-9fa3-441b-8721-37ff1e795e6a","createdAt":1783352137161,"cwd":"{{cwd}}","parentSession":"96cf59c9-b347-48b9-b234-a5200913ad05","seedLength":42,"origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498796080,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"fae41bae-3f35-4b19-b19a-eb6033a1b066"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498796081,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498796115,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498796080,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"8e65a90a-a69c-44f1-b55f-49fefdabb74c"}]}}
+{"type":"turn/start","seq":1,"time":1785821406454,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821406454,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352134840,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498796115,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"fae41bae-3f35-4b19-b19a-eb6033a1b066"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730448968,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f2f808ac-c253-44f8-a18d-824da9f55ef6"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498796115,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"8e65a90a-a69c-44f1-b55f-49fefdabb74c"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730448968,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"40eb2299-67e0-44db-8132-84564259fc8b"},"surfaceOp":"append"}
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@@ -16,16 +16,16 @@
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 {"type":"session/end-seed","seq":42,"time":1785730449008,"data":{}}
-{"type":"agent/inbox/spliced","seq":43,"time":1785498796160,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f285257d-dfa4-4347-97ff-a46d38f60fa0"}]}}
-{"type":"agent/inbox/spliced","seq":44,"time":1785730449008,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":45,"time":1785730449025,"data":{"version":2,"mode":"one-shot","provider":"fork","label":"Recall project codeword"}}
-{"type":"turn/start","seq":46,"time":1785730449027,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":43,"time":1785498796160,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"d037163e-ed56-4c9c-b5d1-57df017d618c"}]}}
+{"type":"turn/start","seq":44,"time":1785821406523,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":45,"time":1785821406523,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":46,"time":1785821406543,"data":{"version":2,"mode":"one-shot","provider":"fork","label":"Recall project codeword"}}
 {"type":"step/start","seq":47,"time":1785730449027,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":48,"time":1785730449027,"data":{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f285257d-dfa4-4347-97ff-a46d38f60fa0"},"surfaceOp":"append"}
+{"type":"user/message","seq":48,"time":1785730449027,"data":{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"d037163e-ed56-4c9c-b5d1-57df017d618c"},"surfaceOp":"append"}
 {"type":"request/header","seq":49,"time":1785730449027,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"resume"}}
 {"type":"assistant/chunk","seq":50,"time":1783352138046,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
 {"type":"reasoning-chunks","seq0":51,"time0":1783352138046,"data":{"turn":2,"step":1,"index":0,"dt":[0,28,1,0,0,0,0,28,0,0,0,0,28,28,1,0,0,28,0,0,29,0,0,28,1,28,1,0,0,0,0,30,2],"texts":["The"," user"," asked"," me"," to"," remember"," the"," project"," cod","ew","ord"," \"","M","ARM","AL","ADE","\""," and"," now"," they","'re"," asking"," what"," it"," is","."," I"," should"," just"," reply"," with"," that"," word","."]}}
@@ -35,6 +35,6 @@
 {"type":"assistant/chunk","seq":91,"time":1785498796192,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"MARMALADE"}}}}
 {"type":"assistant/chunk","seq":92,"time":1785730449034,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":97,"outputTokens":39,"cacheReadTokens":2816,"reasoningTokens":34}}}}
 {"type":"assistant/chunk","seq":93,"time":1785730449034,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":94,"time":1785730449034,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to remember the project codeword \"MARMALADE\" and now they're asking what it is. I should just reply with that word."},{"type":"text","text":"MARMALADE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bf4c74b9-e784-45e8-ae03-4d56a418010e"},"usage":{"inputTokens":97,"outputTokens":39,"cacheReadTokens":2816,"reasoningTokens":34}},"sourceEventSeqs":[50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93],"surfaceOp":"append"}
+{"type":"assistant/message","seq":94,"time":1785730449034,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to remember the project codeword \"MARMALADE\" and now they're asking what it is. I should just reply with that word."},{"type":"text","text":"MARMALADE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cdc56e00-c648-4669-92b2-7299e41cb743"},"usage":{"inputTokens":97,"outputTokens":39,"cacheReadTokens":2816,"reasoningTokens":34}},"sourceEventSeqs":[50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93],"surfaceOp":"append"}
 {"type":"step/end","seq":95,"time":1785730449035,"data":{"turn":2,"step":1}}
 {"type":"turn/end","seq":96,"time":1785730449035,"data":{"turn":2,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-fork/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-fork/session.jsonl
index 764150c303..0bf255cea2 100644
--- a/examples/acp-agent/tests/snapshots/subagent-fork/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-fork/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"96cf59c9-b347-48b9-b234-a5200913ad05","createdAt":1783352134832,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498796080,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"fae41bae-3f35-4b19-b19a-eb6033a1b066"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498796081,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498796115,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498796080,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"8e65a90a-a69c-44f1-b55f-49fefdabb74c"}]}}
+{"type":"turn/start","seq":1,"time":1785821406454,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821406454,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352134840,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498796115,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"fae41bae-3f35-4b19-b19a-eb6033a1b066"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730448968,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f2f808ac-c253-44f8-a18d-824da9f55ef6"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498796115,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is MARMALADE. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"8e65a90a-a69c-44f1-b55f-49fefdabb74c"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730448968,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"40eb2299-67e0-44db-8132-84564259fc8b"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730448968,"data":{"title":"Remember this fact for later:","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498796118,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730448969,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,14 +16,14 @@
 {"type":"assistant/chunk","seq":36,"time":1783352135771,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"OK"}}}}
 {"type":"assistant/chunk","seq":37,"time":1785498796128,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":2885,"outputTokens":25,"cacheReadTokens":0,"reasoningTokens":23}}}}
 {"type":"assistant/chunk","seq":38,"time":1785730448979,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":39,"time":1785730448979,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to remember the codeword \"MARMALADE\" and reply with just \"OK\"."},{"type":"text","text":"OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"326fdd60-91c8-4885-88f5-f19ebddcf7ea"},"usage":{"inputTokens":2885,"outputTokens":25,"cacheReadTokens":0,"reasoningTokens":23}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":39,"time":1785730448979,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to remember the codeword \"MARMALADE\" and reply with just \"OK\"."},{"type":"text","text":"OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7ac2e3d7-d558-4b24-b71e-40fc2f42216d"},"usage":{"inputTokens":2885,"outputTokens":25,"cacheReadTokens":0,"reasoningTokens":23}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":40,"time":1785730448979,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":41,"time":1785730448979,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":42,"time":1785498796131,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent_fork tool exactly once to delegate this subtask to a forked child agent: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' The forked child inherits this conversation, so it can answer. After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"1cfbb707-bd7c-4bdb-803e-e6ab54ba96d1"}]}}
-{"type":"agent/inbox/spliced","seq":43,"time":1785730448980,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":44,"time":1785730448991,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":42,"time":1785498796131,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent_fork tool exactly once to delegate this subtask to a forked child agent: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' The forked child inherits this conversation, so it can answer. After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"444d4dbd-e948-45ac-89a9-a56cf91c75e8"}]}}
+{"type":"turn/start","seq":43,"time":1785821406495,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":44,"time":1785821406496,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":45,"time":1785730448991,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":46,"time":1785730448991,"data":{"content":[{"type":"text","text":"Use the subagent_fork tool exactly once to delegate this subtask to a forked child agent: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' The forked child inherits this conversation, so it can answer. After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"1cfbb707-bd7c-4bdb-803e-e6ab54ba96d1"},"surfaceOp":"append"}
+{"type":"user/message","seq":46,"time":1785730448991,"data":{"content":[{"type":"text","text":"Use the subagent_fork tool exactly once to delegate this subtask to a forked child agent: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' The forked child inherits this conversation, so it can answer. After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"444d4dbd-e948-45ac-89a9-a56cf91c75e8"},"surfaceOp":"append"}
 {"type":"assistant/chunk","seq":47,"time":1783352136256,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
 {"type":"reasoning-chunks","seq0":48,"time0":1783352136256,"data":{"turn":2,"step":1,"index":0,"dt":[0,0,26,1,0,0,31,0,27,25,1,27,1,0,28,0,0,0,27,1,27,0,30,27,0,28,0,0,0,0,28,0,1,0,0,28,0,0,0,0,28,29,0,1,0,0,0,27,1,0,26,1,0,0,86,0,28,0],"texts":["The"," user"," wants"," me"," to"," use"," sub","agent","_f","ork"," to"," delegate"," a"," question"," to"," a"," child"," agent","."," The"," child"," agent"," inher","its"," this"," conversation"," and"," should"," be"," able"," to"," answer",":"," the"," project"," cod","ew","ord"," is"," MAR","M","AL","ADE","."," After"," the"," sub","agent"," returns",","," I"," should"," reply"," with"," PAR","ENT","_D","ONE","."]}}
 {"type":"assistant/chunk","seq":107,"time":1783352136847,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
@@ -32,9 +32,9 @@
 {"type":"assistant/chunk","seq":154,"time":1785498796149,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_sAtKUseRzHRBvL4CF7XF1334","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}}}}
 {"type":"assistant/chunk","seq":155,"time":1785498796149,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":158,"outputTokens":147,"cacheReadTokens":2816,"reasoningTokens":59}}}}
 {"type":"assistant/chunk","seq":156,"time":1785730448998,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":157,"time":1785730448998,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use subagent_fork to delegate a question to a child agent. The child agent inherits this conversation and should be able to answer: the project codeword is MARMALADE. After the subagent returns, I should reply with PARENT_DONE."},{"type":"tool-call","id":"call_00_sAtKUseRzHRBvL4CF7XF1334","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0e4f11d5-fdc6-444e-a5af-1c4af9f5b8ed"},"usage":{"inputTokens":158,"outputTokens":147,"cacheReadTokens":2816,"reasoningTokens":59}},"sourceEventSeqs":[47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156],"surfaceOp":"append"}
+{"type":"assistant/message","seq":157,"time":1785730448998,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use subagent_fork to delegate a question to a child agent. The child agent inherits this conversation and should be able to answer: the project codeword is MARMALADE. After the subagent returns, I should reply with PARENT_DONE."},{"type":"tool-call","id":"call_00_sAtKUseRzHRBvL4CF7XF1334","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"37c2b0ec-fab8-4f35-86e9-6f1366a1936e"},"usage":{"inputTokens":158,"outputTokens":147,"cacheReadTokens":2816,"reasoningTokens":59}},"sourceEventSeqs":[47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156],"surfaceOp":"append"}
 {"type":"tool/call","seq":158,"time":1785730448999,"data":{"turn":2,"step":1,"callId":"call_00_sAtKUseRzHRBvL4CF7XF1334","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}}
-{"type":"tool/result","seq":159,"time":1785730449037,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_sAtKUseRzHRBvL4CF7XF1334"},"content":[{"type":"tool-result","toolCallId":"call_00_sAtKUseRzHRBvL4CF7XF1334","content":[{"type":"text","text":"MARMALADE"}],"isError":false}],"role":"user","id":"54371788-2e90-405c-a6a3-476aac486937"}},"sourceEventSeqs":[158],"surfaceOp":"append"}
+{"type":"tool/result","seq":159,"time":1785730449037,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_sAtKUseRzHRBvL4CF7XF1334"},"content":[{"type":"tool-result","toolCallId":"call_00_sAtKUseRzHRBvL4CF7XF1334","content":[{"type":"text","text":"MARMALADE"}],"isError":false}],"role":"user","id":"ab76911f-4c1e-43bf-b8c7-ba5173c4f2d6"}},"sourceEventSeqs":[158],"surfaceOp":"append"}
 {"type":"step/end","seq":160,"time":1785730449037,"data":{"turn":2,"step":1}}
 {"type":"step/start","seq":161,"time":1785730449050,"data":{"turn":2,"step":2}}
 {"type":"assistant/chunk","seq":162,"time":1783352139128,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -45,6 +45,6 @@
 {"type":"assistant/chunk","seq":194,"time":1785498796216,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PARENT_DONE"}}}}
 {"type":"assistant/chunk","seq":195,"time":1785498796216,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":65,"outputTokens":30,"cacheReadTokens":3072,"reasoningTokens":25}}}}
 {"type":"assistant/chunk","seq":196,"time":1785730449055,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":197,"time":1785730449055,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The forked child agent correctly returned \"MARMALADE\". Now I need to reply with \"PARENT_DONE\"."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b037d2b1-818f-4b79-a3f0-f3611e6964aa"},"usage":{"inputTokens":65,"outputTokens":30,"cacheReadTokens":3072,"reasoningTokens":25}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":197,"time":1785730449055,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The forked child agent correctly returned \"MARMALADE\". Now I need to reply with \"PARENT_DONE\"."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1dfdd09b-b2f8-4f93-903c-f9548433599f"},"usage":{"inputTokens":65,"outputTokens":30,"cacheReadTokens":3072,"reasoningTokens":25}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":198,"time":1785730449055,"data":{"turn":2,"step":2}}
 {"type":"turn/end","seq":199,"time":1785730449055,"data":{"turn":2,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl
index 644344bddb..40fd29b21d 100644
--- a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl
@@ -1,12 +1,12 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
 {"type":"subagent/descriptor","seq":0,"time":1785531795641,"data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
 {"type":"session/end-seed","seq":1,"time":1785531795641,"data":{}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785730454803,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"9bdceb30-3513-49d8-9e3a-87ac67b4a435"}]}}
-{"type":"agent/inbox/spliced","seq":3,"time":1785730454803,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":4,"time":1785730454835,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785730454803,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a46160e-89d3-433b-bf04-66fb0313abfa"}]}}
+{"type":"turn/start","seq":3,"time":1785821412774,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":4,"time":1785821412774,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":5,"time":1785730454835,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1785730454835,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"9bdceb30-3513-49d8-9e3a-87ac67b4a435"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1785730454835,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"9fce0ad9-1c4c-4ab8-b117-e03226e46649"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730454835,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a46160e-89d3-433b-bf04-66fb0313abfa"},"surfaceOp":"append"}
+{"type":"user/message","seq":7,"time":1785730454835,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"524be394-8639-4c12-a41d-799b9e0120a1"},"surfaceOp":"append"}
 {"type":"session/title","seq":8,"time":1785730454835,"data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":9,"time":1785730454835,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":10,"time":1785730454835,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -15,6 +15,6 @@
 {"type":"assistant/chunk","seq":13,"time":1785531795683,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
 {"type":"assistant/chunk","seq":14,"time":1785531795683,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":15,"time":1785730454843,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":16,"time":1785730454843,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"dc34e123-a8db-4a3f-a3c3-c043b28a008d"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
+{"type":"assistant/message","seq":16,"time":1785730454843,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f6a952dd-2d09-4b5c-b8ae-5456cfdfeab0"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
 {"type":"step/end","seq":17,"time":1785730454843,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":18,"time":1785730454844,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl
index 0b66cd49a8..00da410d49 100644
--- a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1789000000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785730454756,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"5d0fadb9-31b5-4373-a5d3-aa04a95ed13e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785730454756,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785730454783,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785730454756,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"c2febfff-792d-4457-a944-933ff0de0570"}]}}
+{"type":"turn/start","seq":1,"time":1785821412725,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821412725,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785730454783,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785730454783,"data":{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"5d0fadb9-31b5-4373-a5d3-aa04a95ed13e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730454783,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"baa96869-e9da-4dbc-a486-2f1d5dccd78f"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785730454783,"data":{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"c2febfff-792d-4457-a944-933ff0de0570"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730454783,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"cc8cb20d-5802-46a9-87b8-d3ee784f8e52"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730454783,"data":{"title":"Call the subagent tool once","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785730454784,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730454784,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"time":1785531795632,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785531795632,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730454793,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730454793,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"969abb7d-532e-43cf-b70d-c5022b311c55"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730454793,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4dda49d6-5d02-456f-ba95-68699662793d"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"tool/call","seq":15,"time":1785730454793,"data":{"turn":1,"step":1,"callId":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}
-{"type":"tool/result","seq":16,"time":1785730454804,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_bg_start"},"content":[{"type":"tool-result","toolCallId":"call_bg_start","content":[{"type":"text","text":"started subagent 33333333-3333-4333-8333-333333333333"}],"isError":false}],"role":"user","id":"abba2082-03c0-428c-b596-b5dc6cd9df40"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","seq":16,"time":1785730454804,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_bg_start"},"content":[{"type":"tool-result","toolCallId":"call_bg_start","content":[{"type":"text","text":"started subagent 33333333-3333-4333-8333-333333333333"}],"isError":false}],"role":"user","id":"7f1fbe79-98b7-410a-af4d-c40d52a366dc"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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@@ -23,22 +23,22 @@
 {"type":"assistant/chunk","seq":21,"time":1785531795656,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"STARTED"}}}}
 {"type":"assistant/chunk","seq":22,"time":1785531795656,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":23,"time":1785730454820,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":1785730454820,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"STARTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3e852719-cad6-461f-85b5-3e5d45247355"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"assistant/message","seq":24,"time":1785730454820,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"STARTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2ee459fa-21f9-48c6-a42e-3c38eca1e4c9"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
 {"type":"step/end","seq":25,"time":1785730454821,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":26,"time":1785730454821,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":27,"time":1785730454857,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call list_agents once and observe the subagent you started. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"21c112ef-e880-459b-90ea-5ab61736d08e"}]}}
-{"type":"agent/inbox/spliced","seq":28,"time":1785730454857,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":29,"time":1785730454863,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":27,"time":1785730454857,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call list_agents once and observe the subagent you started. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"3bcac2a3-e0db-465b-94b4-4e2761236475"}]}}
+{"type":"turn/start","seq":28,"time":1785821412840,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":29,"time":1785821412840,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":30,"time":1785730454863,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":31,"time":1785730454863,"data":{"content":[{"type":"text","text":"Call list_agents once and observe the subagent you started. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"21c112ef-e880-459b-90ea-5ab61736d08e"},"surfaceOp":"append"}
+{"type":"user/message","seq":31,"time":1785730454863,"data":{"content":[{"type":"text","text":"Call list_agents once and observe the subagent you started. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"3bcac2a3-e0db-465b-94b4-4e2761236475"},"surfaceOp":"append"}
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-{"type":"assistant/message","seq":37,"time":1785730454867,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_list","name":"list_agents","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d80f3292-b1d3-45fc-ad4a-76f950b3d435"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
+{"type":"assistant/message","seq":37,"time":1785730454867,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_list","name":"list_agents","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"199c7794-d782-4957-b7ed-69d094b9c0ef"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
 {"type":"tool/call","seq":38,"time":1785730454867,"data":{"turn":2,"step":1,"callId":"call_list","name":"list_agents","arguments":"{}"}}
-{"type":"tool/result","seq":39,"time":1785730454893,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_list"},"content":[{"type":"tool-result","toolCallId":"call_list","content":[{"type":"text","text":"33333333-3333-4333-8333-333333333333 [complete] — Reply with CHILD_OK"}],"isError":false}],"role":"user","id":"eb4c4122-d3d3-4be6-bf2a-0600ea212f44"}},"sourceEventSeqs":[38],"surfaceOp":"append"}
+{"type":"tool/result","seq":39,"time":1785730454893,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_list"},"content":[{"type":"tool-result","toolCallId":"call_list","content":[{"type":"text","text":"33333333-3333-4333-8333-333333333333 [complete] — Reply with CHILD_OK"}],"isError":false}],"role":"user","id":"61ceb650-3e32-413e-9d7e-b6ec8a351858"}},"sourceEventSeqs":[38],"surfaceOp":"append"}
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@@ -46,6 +46,6 @@
 {"type":"assistant/chunk","seq":44,"time":1785730454907,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":45,"time":1785730454907,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
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-{"type":"assistant/message","seq":47,"time":1785730454907,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2be5dd66-c880-4f58-8f16-d916cb0cd66b"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[42,43,44,45,46],"surfaceOp":"append"}
+{"type":"assistant/message","seq":47,"time":1785730454907,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"17c1a7c5-84f5-493e-adb5-6a65219e6ad6"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[42,43,44,45,46],"surfaceOp":"append"}
 {"type":"step/end","seq":48,"time":1785730454908,"data":{"turn":2,"step":2}}
 {"type":"turn/end","seq":49,"time":1785730454908,"data":{"turn":2,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl
index 28a1174e6a..e5091842bb 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"e4aafa18-b9e3-48d0-8aae-6c9b25dcae80","createdAt":1783352145223,"cwd":"{{cwd}}","parentSession":"959ffdf5-03e2-465e-9482-009b704632dc","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498797416,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ee2a7297-a51d-4a46-940a-f3843fef563f"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498797416,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730450185,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Reply ALPHA only"}}
-{"type":"turn/start","seq":3,"time":1785730450187,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498797416,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"73ce401a-faaf-408a-879e-7485380d537d"}]}}
+{"type":"turn/start","seq":1,"time":1785821407754,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821407754,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821407767,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Reply ALPHA only"}}
 {"type":"step/start","seq":4,"time":1785730450187,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730450187,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ee2a7297-a51d-4a46-940a-f3843fef563f"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730450187,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"a2d0ff50-cef3-4872-b596-0aefb8d9d980"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730450187,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"73ce401a-faaf-408a-879e-7485380d537d"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730450187,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"4a5a7c59-b6f8-47b0-8c09-d9a05607deac"},"surfaceOp":"append"}
 {"type":"session/title","seq":7,"time":1785730450187,"data":{"title":"Reply with exactly the word","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":8,"time":1785730450187,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":9,"time":1785730450188,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -17,6 +17,6 @@
 {"type":"assistant/chunk","seq":35,"time":1785498797444,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"ALPHA"}}}}
 {"type":"assistant/chunk","seq":36,"time":1785730450194,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":48,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}}}}
 {"type":"assistant/chunk","seq":37,"time":1785730450194,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":38,"time":1785730450194,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7d01f2b1-14a2-47b2-9b40-4910443e5d4e"},"usage":{"inputTokens":48,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":38,"time":1785730450194,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cfff210d-8dd3-4acc-bbc3-fa860baf88cf"},"usage":{"inputTokens":48,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":39,"time":1785730450194,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":40,"time":1785730450195,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl
index 5af94601cf..901eb654fe 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"02b3a8dd-1d5e-4866-825f-5fbf5000a632","createdAt":1783352147504,"cwd":"{{cwd}}","parentSession":"959ffdf5-03e2-465e-9482-009b704632dc","seedLength":36,"origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498797352,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"c678d00a-1f20-4870-a356-6ff6105df190"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498797353,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498797378,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498797352,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3d1ea7cb-c273-4c38-a765-5ff256eaaf51"}]}}
+{"type":"turn/start","seq":1,"time":1785821407687,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821407687,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352142835,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498797379,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"c678d00a-1f20-4870-a356-6ff6105df190"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730450135,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d5b83082-0955-44af-8b9d-4ed4b3e3cae8"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498797379,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3d1ea7cb-c273-4c38-a765-5ff256eaaf51"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730450135,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"473ecf9e-52c4-4db2-be56-1c8f7fa7d932"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730450135,"data":{"title":"Remember this fact for later:","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498797380,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730450136,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,16 +16,16 @@
 {"type":"assistant/chunk","seq":30,"time":1783352143768,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"OK"}}}}
 {"type":"assistant/chunk","seq":31,"time":1785498797389,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":2883,"outputTokens":19,"cacheReadTokens":0,"reasoningTokens":17}}}}
 {"type":"assistant/chunk","seq":32,"time":1785730450146,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":33,"time":1785730450146,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to remember a codeword and just reply with \"OK\"."},{"type":"text","text":"OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bc29c639-a89d-4a19-a677-2202768ad6cc"},"usage":{"inputTokens":2883,"outputTokens":19,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"surfaceOp":"append"}
+{"type":"assistant/message","seq":33,"time":1785730450146,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to remember a codeword and just reply with \"OK\"."},{"type":"text","text":"OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cf8355ae-a447-4c41-b01f-beaf74c3e70e"},"usage":{"inputTokens":2883,"outputTokens":19,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"surfaceOp":"append"}
 {"type":"step/end","seq":34,"time":1785730450146,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":35,"time":1785730450146,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
 {"type":"session/end-seed","seq":36,"time":1785730450227,"data":{}}
-{"type":"agent/inbox/spliced","seq":37,"time":1785498797482,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"56542f3a-7b3f-4feb-b034-25daa90a5513"}]}}
-{"type":"agent/inbox/spliced","seq":38,"time":1785730450228,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":39,"time":1785730450245,"data":{"version":2,"mode":"one-shot","provider":"fork","label":"Recall project codeword"}}
-{"type":"turn/start","seq":40,"time":1785730450246,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":37,"time":1785498797482,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"86e9f144-764f-460d-b72b-262cffe43d77"}]}}
+{"type":"turn/start","seq":38,"time":1785821407808,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":39,"time":1785821407808,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":40,"time":1785821407826,"data":{"version":2,"mode":"one-shot","provider":"fork","label":"Recall project codeword"}}
 {"type":"step/start","seq":41,"time":1785730450246,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":42,"time":1785730450246,"data":{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"56542f3a-7b3f-4feb-b034-25daa90a5513"},"surfaceOp":"append"}
+{"type":"user/message","seq":42,"time":1785730450246,"data":{"content":[{"type":"text","text":"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else."}],"source":{"kind":"user"},"role":"user","id":"86e9f144-764f-460d-b72b-262cffe43d77"},"surfaceOp":"append"}
 {"type":"request/header","seq":43,"time":1785730450247,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"resume"}}
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 {"type":"reasoning-chunks","seq0":45,"time0":1783352148076,"data":{"turn":2,"step":1,"index":0,"dt":[1,0,0,0,29,0,0,0,35,0,0,0,0,26,29,31,0,30,0,0,27,1,27,0,1,0,0,31,1,0],"texts":["The"," user"," is"," asking"," me"," to"," recall"," the"," project"," cod","ew","ord"," that"," was"," mentioned"," earlier"," in"," the"," conversation","."," I"," was"," told"," to"," remember"," it",":"," SA","FF","RON","."]}}
@@ -35,6 +35,6 @@
 {"type":"assistant/chunk","seq":81,"time":1785498797511,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"SAFFRON"}}}}
 {"type":"assistant/chunk","seq":82,"time":1785730450254,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":95,"outputTokens":35,"cacheReadTokens":2816,"reasoningTokens":31}}}}
 {"type":"assistant/chunk","seq":83,"time":1785730450254,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":84,"time":1785730450254,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user is asking me to recall the project codeword that was mentioned earlier in the conversation. I was told to remember it: SAFFRON."},{"type":"text","text":"SAFFRON"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b84a8829-1e38-4a36-a9a9-9380c64083d9"},"usage":{"inputTokens":95,"outputTokens":35,"cacheReadTokens":2816,"reasoningTokens":31}},"sourceEventSeqs":[44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83],"surfaceOp":"append"}
+{"type":"assistant/message","seq":84,"time":1785730450254,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user is asking me to recall the project codeword that was mentioned earlier in the conversation. I was told to remember it: SAFFRON."},{"type":"text","text":"SAFFRON"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e1f347c1-ce65-4ca9-8a9e-05e4366ef365"},"usage":{"inputTokens":95,"outputTokens":35,"cacheReadTokens":2816,"reasoningTokens":31}},"sourceEventSeqs":[44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83],"surfaceOp":"append"}
 {"type":"step/end","seq":85,"time":1785730450254,"data":{"turn":2,"step":1}}
 {"type":"turn/end","seq":86,"time":1785730450254,"data":{"turn":2,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl
index 1ed3f2ed9a..0666301e1e 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"959ffdf5-03e2-465e-9482-009b704632dc","createdAt":1783352142830,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498797352,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"c678d00a-1f20-4870-a356-6ff6105df190"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498797353,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498797378,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498797352,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3d1ea7cb-c273-4c38-a765-5ff256eaaf51"}]}}
+{"type":"turn/start","seq":1,"time":1785821407687,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821407687,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352142835,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498797379,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"c678d00a-1f20-4870-a356-6ff6105df190"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730450135,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d5b83082-0955-44af-8b9d-4ed4b3e3cae8"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498797379,"data":{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3d1ea7cb-c273-4c38-a765-5ff256eaaf51"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730450135,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"473ecf9e-52c4-4db2-be56-1c8f7fa7d932"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730450135,"data":{"title":"Remember this fact for later:","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498797380,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730450136,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,14 +16,14 @@
 {"type":"assistant/chunk","seq":30,"time":1783352143768,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"OK"}}}}
 {"type":"assistant/chunk","seq":31,"time":1785498797389,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":2883,"outputTokens":19,"cacheReadTokens":0,"reasoningTokens":17}}}}
 {"type":"assistant/chunk","seq":32,"time":1785730450146,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":33,"time":1785730450146,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to remember a codeword and just reply with \"OK\"."},{"type":"text","text":"OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bc29c639-a89d-4a19-a677-2202768ad6cc"},"usage":{"inputTokens":2883,"outputTokens":19,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"surfaceOp":"append"}
+{"type":"assistant/message","seq":33,"time":1785730450146,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to remember a codeword and just reply with \"OK\"."},{"type":"text","text":"OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cf8355ae-a447-4c41-b01f-beaf74c3e70e"},"usage":{"inputTokens":2883,"outputTokens":19,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"surfaceOp":"append"}
 {"type":"step/end","seq":34,"time":1785730450146,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":35,"time":1785730450146,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":36,"time":1785498797390,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Do these two delegations, once at a time. First, use the subagent tool (fresh child) exactly once: 'Reply with exactly the word ALPHA and nothing else.' Then, after it returns, use the subagent_fork tool (forked child that inherits this conversation) exactly once: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"f87902bd-b016-47f0-b0e1-d3351a8128d4"}]}}
-{"type":"agent/inbox/spliced","seq":37,"time":1785730450147,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":38,"time":1785730450156,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":36,"time":1785498797390,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Do these two delegations, once at a time. First, use the subagent tool (fresh child) exactly once: 'Reply with exactly the word ALPHA and nothing else.' Then, after it returns, use the subagent_fork tool (forked child that inherits this conversation) exactly once: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"80c38716-32d9-4e42-8b93-a094a28ad39e"}]}}
+{"type":"turn/start","seq":37,"time":1785821407727,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":38,"time":1785821407727,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":39,"time":1785730450156,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":40,"time":1785730450156,"data":{"content":[{"type":"text","text":"Do these two delegations, once at a time. First, use the subagent tool (fresh child) exactly once: 'Reply with exactly the word ALPHA and nothing else.' Then, after it returns, use the subagent_fork tool (forked child that inherits this conversation) exactly once: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"f87902bd-b016-47f0-b0e1-d3351a8128d4"},"surfaceOp":"append"}
+{"type":"user/message","seq":40,"time":1785730450156,"data":{"content":[{"type":"text","text":"Do these two delegations, once at a time. First, use the subagent tool (fresh child) exactly once: 'Reply with exactly the word ALPHA and nothing else.' Then, after it returns, use the subagent_fork tool (forked child that inherits this conversation) exactly once: 'What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"80c38716-32d9-4e42-8b93-a094a28ad39e"},"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":77,"time":1783352144932,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
@@ -32,9 +32,9 @@
 {"type":"assistant/chunk","seq":113,"time":1785498797406,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_YvHr2bGomk5HhpgDTvE81896","name":"subagent","arguments":"{\"description\": \"Reply ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}}}}
 {"type":"assistant/chunk","seq":114,"time":1785498797406,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":185,"outputTokens":110,"cacheReadTokens":2816,"reasoningTokens":35}}}}
 {"type":"assistant/chunk","seq":115,"time":1785730450163,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":116,"time":1785730450163,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Let me do these two delegations one at a time as requested.\n\nFirst, I'll use the subagent tool (fresh child) to reply with \"ALPHA\"."},{"type":"tool-call","id":"call_00_YvHr2bGomk5HhpgDTvE81896","name":"subagent","arguments":"{\"description\": \"Reply ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1ca88664-e09a-452a-b8e2-418529e2543d"},"usage":{"inputTokens":185,"outputTokens":110,"cacheReadTokens":2816,"reasoningTokens":35}},"sourceEventSeqs":[41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115],"surfaceOp":"append"}
+{"type":"assistant/message","seq":116,"time":1785730450163,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Let me do these two delegations one at a time as requested.\n\nFirst, I'll use the subagent tool (fresh child) to reply with \"ALPHA\"."},{"type":"tool-call","id":"call_00_YvHr2bGomk5HhpgDTvE81896","name":"subagent","arguments":"{\"description\": \"Reply ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"834262fa-2ebc-483d-8b8f-96301a20332b"},"usage":{"inputTokens":185,"outputTokens":110,"cacheReadTokens":2816,"reasoningTokens":35}},"sourceEventSeqs":[41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115],"surfaceOp":"append"}
 {"type":"tool/call","seq":117,"time":1785730450164,"data":{"turn":2,"step":1,"callId":"call_00_YvHr2bGomk5HhpgDTvE81896","name":"subagent","arguments":"{\"description\": \"Reply ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}}
-{"type":"tool/result","seq":118,"time":1785730450197,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_YvHr2bGomk5HhpgDTvE81896"},"content":[{"type":"tool-result","toolCallId":"call_00_YvHr2bGomk5HhpgDTvE81896","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"2b23b317-64fd-490a-b3fe-d1c50cc1c7f3"}},"sourceEventSeqs":[117],"surfaceOp":"append"}
+{"type":"tool/result","seq":118,"time":1785730450197,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_YvHr2bGomk5HhpgDTvE81896"},"content":[{"type":"tool-result","toolCallId":"call_00_YvHr2bGomk5HhpgDTvE81896","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"18d1dfe7-0cfe-4cd3-8619-d85b2c65445a"}},"sourceEventSeqs":[117],"surfaceOp":"append"}
 {"type":"step/end","seq":119,"time":1785730450197,"data":{"turn":2,"step":1}}
 {"type":"step/start","seq":120,"time":1785730450212,"data":{"turn":2,"step":2}}
 {"type":"assistant/chunk","seq":121,"time":1783352146865,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -45,9 +45,9 @@
 {"type":"assistant/chunk","seq":209,"time":1785498797471,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_JSr5rhREq23wSmwSkCP77184","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}}}}
 {"type":"assistant/chunk","seq":210,"time":1785498797471,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":54,"outputTokens":128,"cacheReadTokens":3072,"reasoningTokens":40}}}}
 {"type":"assistant/chunk","seq":211,"time":1785730450219,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":212,"time":1785730450219,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The first subagent returned \"ALPHA\". Now I need to use the subagent_fork tool (forked child that inherits this conversation) to ask about the project codeword."},{"type":"tool-call","id":"call_00_JSr5rhREq23wSmwSkCP77184","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5f006e41-3eef-4bd2-9fa8-dc9c9c410957"},"usage":{"inputTokens":54,"outputTokens":128,"cacheReadTokens":3072,"reasoningTokens":40}},"sourceEventSeqs":[121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211],"surfaceOp":"append"}
+{"type":"assistant/message","seq":212,"time":1785730450219,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The first subagent returned \"ALPHA\". Now I need to use the subagent_fork tool (forked child that inherits this conversation) to ask about the project codeword."},{"type":"tool-call","id":"call_00_JSr5rhREq23wSmwSkCP77184","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7790a2a8-64b3-4d98-8d85-6b2667f3adbc"},"usage":{"inputTokens":54,"outputTokens":128,"cacheReadTokens":3072,"reasoningTokens":40}},"sourceEventSeqs":[121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211],"surfaceOp":"append"}
 {"type":"tool/call","seq":213,"time":1785730450219,"data":{"turn":2,"step":2,"callId":"call_00_JSr5rhREq23wSmwSkCP77184","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}}
-{"type":"tool/result","seq":214,"time":1785730450254,"data":{"turn":2,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_JSr5rhREq23wSmwSkCP77184"},"content":[{"type":"tool-result","toolCallId":"call_00_JSr5rhREq23wSmwSkCP77184","content":[{"type":"text","text":"SAFFRON"}],"isError":false}],"role":"user","id":"1b0bf272-bff9-4c4c-8259-8f2d0764466e"}},"sourceEventSeqs":[213],"surfaceOp":"append"}
+{"type":"tool/result","seq":214,"time":1785730450254,"data":{"turn":2,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_JSr5rhREq23wSmwSkCP77184"},"content":[{"type":"tool-result","toolCallId":"call_00_JSr5rhREq23wSmwSkCP77184","content":[{"type":"text","text":"SAFFRON"}],"isError":false}],"role":"user","id":"4e5624d0-b633-4df7-ad19-db764e298422"}},"sourceEventSeqs":[213],"surfaceOp":"append"}
 {"type":"step/end","seq":215,"time":1785730450255,"data":{"turn":2,"step":2}}
 {"type":"step/start","seq":216,"time":1785730450263,"data":{"turn":2,"step":3}}
 {"type":"assistant/chunk","seq":217,"time":1783352149217,"data":{"turn":2,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -58,6 +58,6 @@
 {"type":"assistant/chunk","seq":288,"time":1785498797528,"data":{"turn":2,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PARENT_DONE"}}}}
 {"type":"assistant/chunk","seq":289,"time":1785498797528,"data":{"turn":2,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":69,"outputTokens":69,"cacheReadTokens":3200,"reasoningTokens":64}}}}
 {"type":"assistant/chunk","seq":290,"time":1785730450269,"data":{"turn":2,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":291,"time":1785730450270,"data":{"turn":2,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Both subagents returned:\n1. First (fresh child): \"ALPHA\"\n2. Second (forked child): \"SAFFRON\" - correctly inherited the conversation context where I was asked to remember the codeword \"SAFFRON\".\n\nNow I reply with \"PARENT_DONE\" as instructed."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f6240a8f-eed5-4f63-9ad8-218790b6d893"},"usage":{"inputTokens":69,"outputTokens":69,"cacheReadTokens":3200,"reasoningTokens":64}},"sourceEventSeqs":[217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290],"surfaceOp":"append"}
+{"type":"assistant/message","seq":291,"time":1785730450270,"data":{"turn":2,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Both subagents returned:\n1. First (fresh child): \"ALPHA\"\n2. Second (forked child): \"SAFFRON\" - correctly inherited the conversation context where I was asked to remember the codeword \"SAFFRON\".\n\nNow I reply with \"PARENT_DONE\" as instructed."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"256c985a-449a-4176-9233-7d29cf47ba5e"},"usage":{"inputTokens":69,"outputTokens":69,"cacheReadTokens":3200,"reasoningTokens":64}},"sourceEventSeqs":[217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290],"surfaceOp":"append"}
 {"type":"step/end","seq":292,"time":1785730450270,"data":{"turn":2,"step":3}}
 {"type":"turn/end","seq":293,"time":1785730450270,"data":{"turn":2,"step":3,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl
index 7e362b2db5..d1ef746580 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"553f8e92-aac1-4df3-8657-eacbb58f9581","createdAt":1783352127669,"cwd":"{{cwd}}","parentSession":"14dda109-5728-45ba-a002-7db9543fe50e","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498794788,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"7ea43946-d30c-4a08-812f-78bb8fd1287d"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498794788,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730447826,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return ALPHA only"}}
-{"type":"turn/start","seq":3,"time":1785730447827,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498794788,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"a287f842-f6f2-4a17-ab4c-820e41f498d5"}]}}
+{"type":"turn/start","seq":1,"time":1785821405232,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821405232,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821405245,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return ALPHA only"}}
 {"type":"step/start","seq":4,"time":1785730447828,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730447828,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"7ea43946-d30c-4a08-812f-78bb8fd1287d"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730447828,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d7823156-21f8-4d90-b1aa-f897591c32b2"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730447828,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"a287f842-f6f2-4a17-ab4c-820e41f498d5"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730447828,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"bab5cdff-7925-478d-b55a-daa2ef524d7c"},"surfaceOp":"append"}
 {"type":"session/title","seq":7,"time":1785730447828,"data":{"title":"Reply with exactly the word","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":8,"time":1785730447828,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":9,"time":1785730447828,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -17,6 +17,6 @@
 {"type":"assistant/chunk","seq":35,"time":1785498794825,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"ALPHA"}}}}
 {"type":"assistant/chunk","seq":36,"time":1785730447834,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}}}}
 {"type":"assistant/chunk","seq":37,"time":1785730447834,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":38,"time":1785730447834,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"76f20d1a-4ad1-4784-b24a-50c37c44a0de"},"usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":38,"time":1785730447834,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5f1e6087-da72-4a56-9bc0-ae1ac6618a8a"},"usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":39,"time":1785730447834,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":40,"time":1785730447834,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl
index 7164c2bd81..76932f10b9 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"5f49e80c-16fc-42c7-a617-0b6bd0680aa3","createdAt":1783352129662,"cwd":"{{cwd}}","parentSession":"14dda109-5728-45ba-a002-7db9543fe50e","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498794853,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word BETA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"539a4738-a4e2-4541-b4a9-15ba9d6bc22b"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498794853,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730447879,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return BETA only"}}
-{"type":"turn/start","seq":3,"time":1785730447880,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498794853,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word BETA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"53f6419d-8ddc-4eee-8803-5b68411336f9"}]}}
+{"type":"turn/start","seq":1,"time":1785821405286,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821405286,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821405299,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return BETA only"}}
 {"type":"step/start","seq":4,"time":1785730447881,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730447881,"data":{"content":[{"type":"text","text":"Reply with exactly the word BETA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"539a4738-a4e2-4541-b4a9-15ba9d6bc22b"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730447881,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"01720782-5202-492f-86a2-4bd747779f7e"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730447881,"data":{"content":[{"type":"text","text":"Reply with exactly the word BETA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"53f6419d-8ddc-4eee-8803-5b68411336f9"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730447881,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"036067ef-a106-4955-841c-a0d2effe51ef"},"surfaceOp":"append"}
 {"type":"session/title","seq":7,"time":1785730447881,"data":{"title":"Reply with exactly the word","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":8,"time":1785730447881,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":9,"time":1785730447881,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -18,6 +18,6 @@
 {"type":"assistant/chunk","seq":33,"time":1785498794882,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"BETA"}}}}
 {"type":"assistant/chunk","seq":34,"time":1785730447887,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":48,"outputTokens":21,"cacheReadTokens":2816,"reasoningTokens":18}}}}
 {"type":"assistant/chunk","seq":35,"time":1785730447887,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":36,"time":1785730447887,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"BETA\" and nothing else."},{"type":"text","text":"BETA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b738af9a-040d-4f86-8152-e06de02af49c"},"usage":{"inputTokens":48,"outputTokens":21,"cacheReadTokens":2816,"reasoningTokens":18}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":36,"time":1785730447887,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"BETA\" and nothing else."},{"type":"text","text":"BETA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"adc4527d-efd1-4c89-b42b-826c33f2bb12"},"usage":{"inputTokens":48,"outputTokens":21,"cacheReadTokens":2816,"reasoningTokens":18}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":37,"time":1785730447887,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":38,"time":1785730447887,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl
index d14faac279..b6b0563c4f 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"14dda109-5728-45ba-a002-7db9543fe50e","createdAt":1783352126247,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498794739,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool TWICE, once at a time, to delegate two subtasks to child agents. First subtask: 'Reply with exactly the word ALPHA and nothing else.' Second subtask (after the first returns): 'Reply with exactly the word BETA and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"f8ee5f88-3e34-4344-a220-f6805d2d94ff"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498794739,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498794765,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498794739,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool TWICE, once at a time, to delegate two subtasks to child agents. First subtask: 'Reply with exactly the word ALPHA and nothing else.' Second subtask (after the first returns): 'Reply with exactly the word BETA and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"07bf16df-0499-420d-9510-3204061f0122"}]}}
+{"type":"turn/start","seq":1,"time":1785821405184,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821405184,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352126252,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498794765,"data":{"content":[{"type":"text","text":"Use the subagent tool TWICE, once at a time, to delegate two subtasks to child agents. First subtask: 'Reply with exactly the word ALPHA and nothing else.' Second subtask (after the first returns): 'Reply with exactly the word BETA and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"f8ee5f88-3e34-4344-a220-f6805d2d94ff"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730447790,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"3856a5c6-0eda-4407-ad4e-47e62e8e7653"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498794765,"data":{"content":[{"type":"text","text":"Use the subagent tool TWICE, once at a time, to delegate two subtasks to child agents. First subtask: 'Reply with exactly the word ALPHA and nothing else.' Second subtask (after the first returns): 'Reply with exactly the word BETA and nothing else.' After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"07bf16df-0499-420d-9510-3204061f0122"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730447790,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"9b4b262d-cbd7-4cd8-b24b-70b2b401b0fe"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730447790,"data":{"title":"Use the subagent tool TWICE,","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498794766,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730447791,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,9 +16,9 @@
 {"type":"assistant/chunk","seq":95,"time":1783352127665,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}}}}
 {"type":"assistant/chunk","seq":96,"time":1785498794778,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":2938,"outputTokens":124,"cacheReadTokens":0,"reasoningTokens":49}}}}
 {"type":"assistant/chunk","seq":97,"time":1785730447803,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":98,"time":1785730447803,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the subagent tool twice, sequentially (one at a time). First subagent should reply with \"ALPHA\", second with \"BETA\". After both return, I reply with \"PARENT_DONE\"."},{"type":"tool-call","id":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f38bddff-7f20-475f-a9bc-b282f53644fc"},"usage":{"inputTokens":2938,"outputTokens":124,"cacheReadTokens":0,"reasoningTokens":49}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97],"surfaceOp":"append"}
+{"type":"assistant/message","seq":98,"time":1785730447803,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the subagent tool twice, sequentially (one at a time). First subagent should reply with \"ALPHA\", second with \"BETA\". After both return, I reply with \"PARENT_DONE\"."},{"type":"tool-call","id":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c5e5bb9c-4d33-44c5-b5c3-ec3afa42d58b"},"usage":{"inputTokens":2938,"outputTokens":124,"cacheReadTokens":0,"reasoningTokens":49}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97],"surfaceOp":"append"}
 {"type":"tool/call","seq":99,"time":1785730447803,"data":{"turn":1,"step":1,"callId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\"}"}}
-{"type":"tool/result","seq":100,"time":1785730447837,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010"},"content":[{"type":"tool-result","toolCallId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"3084171f-07c1-4a57-b9b0-75cd5bdfe029"}},"sourceEventSeqs":[99],"surfaceOp":"append"}
+{"type":"tool/result","seq":100,"time":1785730447837,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010"},"content":[{"type":"tool-result","toolCallId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"735a5fe2-0978-4fda-b8ad-bc22114b7016"}},"sourceEventSeqs":[99],"surfaceOp":"append"}
 {"type":"step/end","seq":101,"time":1785730447837,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":102,"time":1785730447852,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":103,"time":1783352129152,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -29,9 +29,9 @@
 {"type":"assistant/chunk","seq":161,"time":1783352129661,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\"}"}}}}
 {"type":"assistant/chunk","seq":162,"time":1785498794844,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":133,"outputTokens":96,"cacheReadTokens":2944,"reasoningTokens":23}}}}
 {"type":"assistant/chunk","seq":163,"time":1785730447858,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":164,"time":1785730447858,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"First subagent returned \"ALPHA\". Now I'll call the second subagent to return \"BETA\"."},{"type":"tool-call","id":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2f17595c-ea8e-4753-9a97-c51fb3581a30"},"usage":{"inputTokens":133,"outputTokens":96,"cacheReadTokens":2944,"reasoningTokens":23}},"sourceEventSeqs":[103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163],"surfaceOp":"append"}
+{"type":"assistant/message","seq":164,"time":1785730447858,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"First subagent returned \"ALPHA\". Now I'll call the second subagent to return \"BETA\"."},{"type":"tool-call","id":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6a713c38-b05b-4bb3-9103-bf11a2bc383f"},"usage":{"inputTokens":133,"outputTokens":96,"cacheReadTokens":2944,"reasoningTokens":23}},"sourceEventSeqs":[103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163],"surfaceOp":"append"}
 {"type":"tool/call","seq":165,"time":1785730447859,"data":{"turn":1,"step":2,"callId":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\"}"}}
-{"type":"tool/result","seq":166,"time":1785730447888,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_FudNKuJ0fchSptGy3Scw1411"},"content":[{"type":"tool-result","toolCallId":"call_00_FudNKuJ0fchSptGy3Scw1411","content":[{"type":"text","text":"BETA"}],"isError":false}],"role":"user","id":"7e779ffd-2b1b-4740-8479-0e3a118ecd8d"}},"sourceEventSeqs":[165],"surfaceOp":"append"}
+{"type":"tool/result","seq":166,"time":1785730447888,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_FudNKuJ0fchSptGy3Scw1411"},"content":[{"type":"tool-result","toolCallId":"call_00_FudNKuJ0fchSptGy3Scw1411","content":[{"type":"text","text":"BETA"}],"isError":false}],"role":"user","id":"d882a00e-e991-4e2a-9610-698f6bc8924d"}},"sourceEventSeqs":[165],"surfaceOp":"append"}
 {"type":"step/end","seq":167,"time":1785730447888,"data":{"turn":1,"step":2}}
 {"type":"step/start","seq":168,"time":1785730447902,"data":{"turn":1,"step":3}}
 {"type":"assistant/chunk","seq":169,"time":1783352131045,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -42,6 +42,6 @@
 {"type":"assistant/chunk","seq":206,"time":1783352131242,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PARENT_DONE"}}}}
 {"type":"assistant/chunk","seq":207,"time":1785498794910,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":115,"outputTokens":35,"cacheReadTokens":3072,"reasoningTokens":30}}}}
 {"type":"assistant/chunk","seq":208,"time":1785730447907,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":209,"time":1785730447907,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Both subagents have returned: first with \"ALPHA\", second with \"BETA\". Now I should reply with \"PARENT_DONE\"."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a20a16e3-478e-43a6-bd30-1980a99b6c6d"},"usage":{"inputTokens":115,"outputTokens":35,"cacheReadTokens":3072,"reasoningTokens":30}},"sourceEventSeqs":[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":"assistant/message","seq":209,"time":1785730447907,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Both subagents have returned: first with \"ALPHA\", second with \"BETA\". Now I should reply with \"PARENT_DONE\"."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b51ff9b8-1c06-485e-8e42-5eac7675c590"},"usage":{"inputTokens":115,"outputTokens":35,"cacheReadTokens":3072,"reasoningTokens":30}},"sourceEventSeqs":[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":1785730447907,"data":{"turn":1,"step":3}}
 {"type":"turn/end","seq":211,"time":1785730447907,"data":{"turn":1,"step":3,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl
index 88d07df109..dcf0ec4747 100644
--- a/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785730452478,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate one foreground subagent. Its published run will fail; report that failure as PARENT_OBSERVED_ERROR."}],"source":{"kind":"user"},"role":"user","id":"5b8e11ca-9e09-4a00-9375-e7360b5fa4ad"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785730452479,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785730452505,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785730452478,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate one foreground subagent. Its published run will fail; report that failure as PARENT_OBSERVED_ERROR."}],"source":{"kind":"user"},"role":"user","id":"07e6bcfc-3d70-46ef-8bdd-17a45c2c346e"}]}}
+{"type":"turn/start","seq":1,"time":1785821410243,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821410244,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785730452505,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785730452505,"data":{"content":[{"type":"text","text":"Delegate one foreground subagent. Its published run will fail; report that failure as PARENT_OBSERVED_ERROR."}],"source":{"kind":"user"},"role":"user","id":"5b8e11ca-9e09-4a00-9375-e7360b5fa4ad"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730452505,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"34a50d41-0ab8-4029-b35c-30810c9ba289"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785730452505,"data":{"content":[{"type":"text","text":"Delegate one foreground subagent. Its published run will fail; report that failure as PARENT_OBSERVED_ERROR."}],"source":{"kind":"user"},"role":"user","id":"07e6bcfc-3d70-46ef-8bdd-17a45c2c346e"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730452505,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"902b2d5b-6b6a-471a-b765-5a5ca5d0ff53"},"surfaceOp":"append"}
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@@ -13,9 +13,9 @@
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@@ -23,6 +23,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl
index f44e47f1d1..1e60d25479 100644
--- a/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl
@@ -1,12 +1,12 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
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-{"type":"turn/start","seq":4,"time":1785730453639,"data":{"turn":1}}
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@@ -15,9 +15,9 @@
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@@ -25,6 +25,6 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl
index 49d0a76295..a11a31ba53 100644
--- a/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl
@@ -1,10 +1,10 @@
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-{"type":"turn/start","seq":2,"time":1785730453591,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785730453561,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Report a finding', and prompt 'Call the report tool once with output exactly CHILD_REPORT_OK, then stop.'. 2. Reply with the single word STARTED. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"5cf78378-e004-4fd5-af4f-cef3b7e190ad"}]}}
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@@ -13,9 +13,9 @@
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-{"type":"assistant/message","seq":40,"time":1785730453687,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_REPORT_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a1ccbec8-a5e8-45f6-8f01-a440ff4298f5"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[35,36,37,38,39],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-spawn/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-spawn/session.1.jsonl
index dfbd1c9c7b..1c2de98410 100644
--- a/examples/acp-agent/tests/snapshots/subagent-spawn/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-spawn/session.1.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"ea339828-7885-42e1-9083-4355e6f1708d","createdAt":1783352120855,"cwd":"{{cwd}}","parentSession":"5138ed0d-e86e-4a7d-b75b-803307e92b17","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498793648,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"4d09f859-ed51-461c-8a3c-996b821dd746"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498793648,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730446718,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Reply with CHILD_OK"}}
-{"type":"turn/start","seq":3,"time":1785730446720,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498793648,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"54ed23d6-e960-4f36-b192-cf06e1618ea6"}]}}
+{"type":"turn/start","seq":1,"time":1785821404007,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821404007,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821404020,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Reply with CHILD_OK"}}
 {"type":"step/start","seq":4,"time":1785730446720,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730446720,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"4d09f859-ed51-461c-8a3c-996b821dd746"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730446720,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"84963e19-1aa7-4372-9c5c-ee89a64a7ed8"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730446720,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"54ed23d6-e960-4f36-b192-cf06e1618ea6"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730446720,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"1b537017-6493-4f52-8504-01a7384e8cc6"},"surfaceOp":"append"}
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@@ -17,6 +17,6 @@
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-{"type":"assistant/message","seq":36,"time":1785730446727,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word CHILD_OK and nothing else."},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0842a1ce-3088-443c-8139-f39a8941b7ac"},"usage":{"inputTokens":48,"outputTokens":21,"cacheReadTokens":2816,"reasoningTokens":17}},"sourceEventSeqs":[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],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-spawn/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-spawn/session.jsonl
index ab1097f48c..0948f64521 100644
--- a/examples/acp-agent/tests/snapshots/subagent-spawn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-spawn/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"5138ed0d-e86e-4a7d-b75b-803307e92b17","createdAt":1783352119267,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498793599,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask to a child agent: 'Reply with exactly the word CHILD_OK and nothing else.' After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"3cb5a8c4-addd-4d3f-80ad-b8e89886803a"}]}}
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-{"type":"turn/start","seq":2,"time":1785498793625,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498793599,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask to a child agent: 'Reply with exactly the word CHILD_OK and nothing else.' After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"a9485ebd-2b4a-434a-bc35-afd757ce141b"}]}}
+{"type":"turn/start","seq":1,"time":1785821403947,"data":{"turn":1}}
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-{"type":"user/message","seq":4,"time":1785498793625,"data":{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask to a child agent: 'Reply with exactly the word CHILD_OK and nothing else.' After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"3cb5a8c4-addd-4d3f-80ad-b8e89886803a"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730446685,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"18d62325-d4a7-4cab-9f37-942c93bba3e6"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498793625,"data":{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask to a child agent: 'Reply with exactly the word CHILD_OK and nothing else.' After the subagent returns, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"a9485ebd-2b4a-434a-bc35-afd757ce141b"},"surfaceOp":"append"}
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@@ -16,9 +16,9 @@
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@@ -29,6 +29,6 @@
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-{"type":"assistant/message","seq":161,"time":1785730446744,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The subagent returned \"CHILD_OK\" as expected. Now I need to reply with the single word \"PARENT_DONE\" and stop."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bcdbf9e0-1c67-4e93-acdd-c48170520d47"},"usage":{"inputTokens":120,"outputTokens":35,"cacheReadTokens":2944,"reasoningTokens":30}},"sourceEventSeqs":[121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160],"surfaceOp":"append"}
+{"type":"assistant/message","seq":161,"time":1785730446744,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The subagent returned \"CHILD_OK\" as expected. Now I need to reply with the single word \"PARENT_DONE\" and stop."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"82643563-e845-4bfa-9e47-98b353d54a39"},"usage":{"inputTokens":120,"outputTokens":35,"cacheReadTokens":2944,"reasoningTokens":30}},"sourceEventSeqs":[121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160],"surfaceOp":"append"}
 {"type":"step/end","seq":162,"time":1785730446744,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":163,"time":1785730446744,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/text-turn/session.jsonl b/examples/acp-agent/tests/snapshots/text-turn/session.jsonl
index ae5dbbdff1..1af23f13b5 100644
--- a/examples/acp-agent/tests/snapshots/text-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/text-turn/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"539aa64c-7f37-40ff-abd8-ed45b717be1b","createdAt":1783600629539,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498761270,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"82ba48f5-7369-447d-b89f-88fc8580f30e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498761271,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498761312,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498761270,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3e25dc34-48e0-4738-8401-1a8d181d37e5"}]}}
+{"type":"turn/start","seq":1,"time":1785821359466,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821359466,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783600629542,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498761313,"data":{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"82ba48f5-7369-447d-b89f-88fc8580f30e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730415287,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"98cc592a-2d52-434f-a641-4d7d9a66a0e8"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498761313,"data":{"content":[{"type":"text","text":"Reply with exactly the word: PONG. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3e25dc34-48e0-4738-8401-1a8d181d37e5"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730415287,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"4b8d9730-0b7b-4e14-8a30-3d852f808f0e"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730415287,"data":{"title":"Reply with exactly the word:","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498761318,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730415288,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -17,6 +17,6 @@
 {"type":"assistant/chunk","seq":34,"time":1783600631009,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PONG"}}}}
 {"type":"assistant/chunk","seq":35,"time":1785498761338,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}}}}
 {"type":"assistant/chunk","seq":36,"time":1785730415297,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":37,"time":1785730415298,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."},{"type":"text","text":"PONG"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bc298ab0-205f-43f0-8baa-df4500c5b1da"},"usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":37,"time":1785730415298,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"PONG\" and not use any tools."},{"type":"text","text":"PONG"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3b028c0c-080e-4de0-8339-9aef7fa4769f"},"usage":{"inputTokens":3091,"outputTokens":23,"cacheReadTokens":0,"reasoningTokens":20}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":38,"time":1785730415298,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":39,"time":1785730415298,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/todo-write/session.jsonl b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
index df23a906ad..42a21301f5 100644
--- a/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"b0f1f758-dcf0-474e-851d-e62c11ec0a09","createdAt":1783352057652,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498772484,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos: \"read the code\" (in_progress), \"write the fix\" (pending), \"run the tests\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"d4bbfbfa-582e-475f-b1ca-06163ab43f89"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498772484,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498772510,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498772484,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos: \"read the code\" (in_progress), \"write the fix\" (pending), \"run the tests\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"5ecf5e4b-6a18-447d-9341-48f38afdd12e"}]}}
+{"type":"turn/start","seq":1,"time":1785821376741,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821376741,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352057657,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498772510,"data":{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos: \"read the code\" (in_progress), \"write the fix\" (pending), \"run the tests\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"d4bbfbfa-582e-475f-b1ca-06163ab43f89"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730425725,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"9d965e09-0199-4bbb-999e-a742e3219b28"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498772510,"data":{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos: \"read the code\" (in_progress), \"write the fix\" (pending), \"run the tests\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"5ecf5e4b-6a18-447d-9341-48f38afdd12e"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730425725,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"8d4ac045-8016-4cec-8b12-91d9459231e1"},"surfaceOp":"append"}
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 {"type":"request/header","seq":7,"time":1785498772511,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730425726,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,10 +16,10 @@
 {"type":"assistant/chunk","seq":97,"time":1783352059096,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_fjAnBThbDjxepBtp3hDt3264","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"read the code\", \"status\": \"in_progress\"}, {\"content\": \"write the fix\", \"status\": \"pending\"}, {\"content\": \"run the tests\", \"status\": \"pending\"}]}"}}}}
 {"type":"assistant/chunk","seq":98,"time":1785498772522,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":2913,"outputTokens":121,"cacheReadTokens":0,"reasoningTokens":31}}}}
 {"type":"assistant/chunk","seq":99,"time":1785730425738,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":100,"time":1785730425738,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the todo_write tool to record a plan with exactly three todos in the specified statuses, then reply with \"DONE\"."},{"type":"tool-call","id":"call_00_fjAnBThbDjxepBtp3hDt3264","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"read the code\", \"status\": \"in_progress\"}, {\"content\": \"write the fix\", \"status\": \"pending\"}, {\"content\": \"run the tests\", \"status\": \"pending\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"220245d0-a93b-4032-9f72-5b3d1f7974b6"},"usage":{"inputTokens":2913,"outputTokens":121,"cacheReadTokens":0,"reasoningTokens":31}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99],"surfaceOp":"append"}
+{"type":"assistant/message","seq":100,"time":1785730425738,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the todo_write tool to record a plan with exactly three todos in the specified statuses, then reply with \"DONE\"."},{"type":"tool-call","id":"call_00_fjAnBThbDjxepBtp3hDt3264","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"read the code\", \"status\": \"in_progress\"}, {\"content\": \"write the fix\", \"status\": \"pending\"}, {\"content\": \"run the tests\", \"status\": \"pending\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"08141496-5477-4d05-b2c7-414865ea9a17"},"usage":{"inputTokens":2913,"outputTokens":121,"cacheReadTokens":0,"reasoningTokens":31}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99],"surfaceOp":"append"}
 {"type":"tool/call","seq":101,"time":1785730425739,"data":{"turn":1,"step":1,"callId":"call_00_fjAnBThbDjxepBtp3hDt3264","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"read the code\", \"status\": \"in_progress\"}, {\"content\": \"write the fix\", \"status\": \"pending\"}, {\"content\": \"run the tests\", \"status\": \"pending\"}]}"}}
 {"type":"todo/write","seq":102,"time":1785730425747,"data":{"todos":[{"content":"read the code","status":"in_progress"},{"content":"write the fix","status":"pending"},{"content":"run the tests","status":"pending"}]}}
-{"type":"tool/result","seq":103,"time":1785730425748,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_fjAnBThbDjxepBtp3hDt3264"},"content":[{"type":"tool-result","toolCallId":"call_00_fjAnBThbDjxepBtp3hDt3264","content":[{"type":"text","text":"Updated todo list: 2 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"9b5a8b11-c357-4d19-ba5c-473a7e20631c"}},"sourceEventSeqs":[101],"surfaceOp":"append"}
+{"type":"tool/result","seq":103,"time":1785730425748,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_fjAnBThbDjxepBtp3hDt3264"},"content":[{"type":"tool-result","toolCallId":"call_00_fjAnBThbDjxepBtp3hDt3264","content":[{"type":"text","text":"Updated todo list: 2 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"c178ad5b-7c1f-4239-9aa6-20d1c6b00a82"}},"sourceEventSeqs":[101],"surfaceOp":"append"}
 {"type":"step/end","seq":104,"time":1785730425748,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":105,"time":1785730425759,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":106,"time":1783352059835,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -31,6 +31,6 @@
 {"type":"assistant/chunk","seq":132,"time":1783352059980,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":133,"time":1785498772545,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":237,"outputTokens":24,"cacheReadTokens":2816,"reasoningTokens":21}}}}
 {"type":"assistant/chunk","seq":134,"time":1785730425764,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":135,"time":1785730425764,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The todos have been written successfully. Now I just need to reply with the single word \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ea2db6ae-9957-401b-b1e3-f53a7be7f8b0"},"usage":{"inputTokens":237,"outputTokens":24,"cacheReadTokens":2816,"reasoningTokens":21}},"sourceEventSeqs":[106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134],"surfaceOp":"append"}
+{"type":"assistant/message","seq":135,"time":1785730425764,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The todos have been written successfully. Now I just need to reply with the single word \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c4e454ce-14cc-4030-be47-0395ac9f12fb"},"usage":{"inputTokens":237,"outputTokens":24,"cacheReadTokens":2816,"reasoningTokens":21}},"sourceEventSeqs":[106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134],"surfaceOp":"append"}
 {"type":"step/end","seq":136,"time":1785730425764,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":137,"time":1785730425764,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl b/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl
index 95a7180277..520431ee55 100644
--- a/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"e9421ff4-baae-4807-a7ea-fd8a65f2c897","createdAt":1783352044766,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498764160,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo SNAPSHOT_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"e26f8455-be64-4b18-8aa1-22d3d640da63"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498764161,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498764188,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498764160,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo SNAPSHOT_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"fe479aa0-1194-40fb-897b-bc7f99b54148"}]}}
+{"type":"turn/start","seq":1,"time":1785821362944,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821362944,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352044773,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498764188,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo SNAPSHOT_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"e26f8455-be64-4b18-8aa1-22d3d640da63"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730417556,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"f1cce823-0746-4d27-bfad-9ec3b184c998"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498764188,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo SNAPSHOT_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"fe479aa0-1194-40fb-897b-bc7f99b54148"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730417556,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"11ca1551-2073-4990-bf8c-828c614d47a8"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730417556,"data":{"title":"Use the bash tool to","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498764190,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730417557,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,9 +16,9 @@
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 {"type":"assistant/chunk","seq":62,"time":1785730417567,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":63,"time":1785730417567,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific bash command and then reply with DONE."},{"type":"tool-call","id":"call_00_Rn2Mz1y8uZN62ukEXiNO2077","name":"bash","arguments":"{\"command\": \"echo SNAPSHOT_OK\", \"description\": \"Run echo SNAPSHOT_OK\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b938210c-b57f-4a17-b2f0-106cd0b433d8"},"usage":{"inputTokens":2879,"outputTokens":89,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62],"surfaceOp":"append"}
+{"type":"assistant/message","seq":63,"time":1785730417567,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific bash command and then reply with DONE."},{"type":"tool-call","id":"call_00_Rn2Mz1y8uZN62ukEXiNO2077","name":"bash","arguments":"{\"command\": \"echo SNAPSHOT_OK\", \"description\": \"Run echo SNAPSHOT_OK\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1d5e73ab-6aea-4555-ae64-00e2772e3b82"},"usage":{"inputTokens":2879,"outputTokens":89,"cacheReadTokens":0,"reasoningTokens":17}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62],"surfaceOp":"append"}
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-{"type":"tool/result","seq":65,"time":1785730417585,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Rn2Mz1y8uZN62ukEXiNO2077"},"content":[{"type":"tool-result","toolCallId":"call_00_Rn2Mz1y8uZN62ukEXiNO2077","content":[{"type":"text","text":"SNAPSHOT_OK\n"}],"isError":false}],"role":"user","id":"0610cab4-6dd3-4f29-9915-bc36ad57501b"}},"sourceEventSeqs":[64],"surfaceOp":"append"}
+{"type":"tool/result","seq":65,"time":1785730417585,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Rn2Mz1y8uZN62ukEXiNO2077"},"content":[{"type":"tool-result","toolCallId":"call_00_Rn2Mz1y8uZN62ukEXiNO2077","content":[{"type":"text","text":"SNAPSHOT_OK\n"}],"isError":false}],"role":"user","id":"ce8a3629-ce77-49bb-b426-eeeefb120c90"}},"sourceEventSeqs":[64],"surfaceOp":"append"}
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@@ -30,6 +30,6 @@
 {"type":"assistant/chunk","seq":98,"time":1783352047156,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
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-{"type":"assistant/message","seq":101,"time":1785730417600,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command executed successfully and printed SNAPSHOT_OK. Now I need to reply with the single word DONE."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"97ee1726-ed07-4c70-91d9-3922f6ca6733"},"usage":{"inputTokens":170,"outputTokens":28,"cacheReadTokens":2816,"reasoningTokens":25}},"sourceEventSeqs":[68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100],"surfaceOp":"append"}
+{"type":"assistant/message","seq":101,"time":1785730417600,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command executed successfully and printed SNAPSHOT_OK. Now I need to reply with the single word DONE."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ad76b9dd-271f-4b2b-bcda-80bb9e169513"},"usage":{"inputTokens":170,"outputTokens":28,"cacheReadTokens":2816,"reasoningTokens":25}},"sourceEventSeqs":[68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl b/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl
index da7e6a9790..094c57bc9c 100644
--- a/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"c12fa9af-1042-4a92-9ba4-4a968ff23495","createdAt":1785078727712,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498776226,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the web_fetch tool exactly once to fetch http://127.0.0.1:43117/menu.html, then reply with exactly DONE. Do not describe the content."}],"source":{"kind":"user"},"role":"user","id":"7bd41a80-ab69-4223-a7ca-ba5f6fe37b89"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498776227,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498776258,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498776226,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the web_fetch tool exactly once to fetch http://127.0.0.1:43117/menu.html, then reply with exactly DONE. Do not describe the content."}],"source":{"kind":"user"},"role":"user","id":"7a222307-4336-4772-8a19-aa1b56558e31"}]}}
+{"type":"turn/start","seq":1,"time":1785821381783,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821381783,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785078727730,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498776258,"data":{"content":[{"type":"text","text":"Use the web_fetch tool exactly once to fetch http://127.0.0.1:43117/menu.html, then reply with exactly DONE. Do not describe the content."}],"source":{"kind":"user"},"role":"user","id":"7bd41a80-ab69-4223-a7ca-ba5f6fe37b89"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730429237,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"973b2987-1f48-44c3-a65a-22403b4bd983"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498776258,"data":{"content":[{"type":"text","text":"Use the web_fetch tool exactly once to fetch http://127.0.0.1:43117/menu.html, then reply with exactly DONE. Do not describe the content."}],"source":{"kind":"user"},"role":"user","id":"7a222307-4336-4772-8a19-aa1b56558e31"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730429237,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"86a43ffd-fecc-482d-806b-54c13a88c9e5"},"surfaceOp":"append"}
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@@ -16,9 +16,9 @@
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-{"type":"assistant/message","seq":83,"time":1785730429249,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the web_fetch tool exactly once to fetch http://127.0.0.1:43117/menu.html, then reply with exactly \"DONE\". Let me do that."},{"type":"tool-call","id":"call_00_sxjOyfDYN07koiE7jiIa5326","name":"web_fetch","arguments":"{\"url\": \"http://127.0.0.1:43117/menu.html\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"d1ce4fed-9473-4e53-a6c7-45f01fa5d3cc"},"usage":{"inputTokens":5405,"outputTokens":103,"cacheReadTokens":0,"reasoningTokens":44}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82],"surfaceOp":"append"}
+{"type":"assistant/message","seq":83,"time":1785730429249,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the web_fetch tool exactly once to fetch http://127.0.0.1:43117/menu.html, then reply with exactly \"DONE\". Let me do that."},{"type":"tool-call","id":"call_00_sxjOyfDYN07koiE7jiIa5326","name":"web_fetch","arguments":"{\"url\": \"http://127.0.0.1:43117/menu.html\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"63b78628-921c-4d56-aaa3-ea8e61c54da2"},"usage":{"inputTokens":5405,"outputTokens":103,"cacheReadTokens":0,"reasoningTokens":44}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82],"surfaceOp":"append"}
 {"type":"tool/call","seq":84,"time":1785730429250,"data":{"turn":1,"step":1,"callId":"call_00_sxjOyfDYN07koiE7jiIa5326","name":"web_fetch","arguments":"{\"url\": \"http://127.0.0.1:43117/menu.html\"}"}}
-{"type":"tool/result","seq":85,"time":1785730429278,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_sxjOyfDYN07koiE7jiIa5326"},"content":[{"type":"tool-result","toolCallId":"call_00_sxjOyfDYN07koiE7jiIa5326","content":[{"type":"text","text":"Fetched http://127.0.0.1:43117/menu.html (HTTP 200)\n\nMenu\n\n# Café menu\n\nPrices include **service & _tax_** — updated daily.\n\n-   Espresso\n-   Flat white\n\n| Drink | Price |\n| --- | --- |\n| Espresso | €2  |\n| Flat white | €3  |\n\nSee [today’s specials](https://fixture.invalid/specials)."}],"isError":false}],"role":"user","id":"75b2c300-31b0-44a8-8e37-b122a6c9b34b"},"meta":{"url":"http://127.0.0.1:43117/menu.html","statusCode":200,"truncated":false}},"sourceEventSeqs":[84],"surfaceOp":"append"}
+{"type":"tool/result","seq":85,"time":1785730429278,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_sxjOyfDYN07koiE7jiIa5326"},"content":[{"type":"tool-result","toolCallId":"call_00_sxjOyfDYN07koiE7jiIa5326","content":[{"type":"text","text":"Fetched http://127.0.0.1:43117/menu.html (HTTP 200)\n\nMenu\n\n# Café menu\n\nPrices include **service & _tax_** — updated daily.\n\n-   Espresso\n-   Flat white\n\n| Drink | Price |\n| --- | --- |\n| Espresso | €2  |\n| Flat white | €3  |\n\nSee [today’s specials](https://fixture.invalid/specials)."}],"isError":false}],"role":"user","id":"f78dd40c-94c1-4007-b3c2-a8bd3729c43f"},"meta":{"url":"http://127.0.0.1:43117/menu.html","statusCode":200,"truncated":false}},"sourceEventSeqs":[84],"surfaceOp":"append"}
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@@ -30,6 +30,6 @@
 {"type":"assistant/chunk","seq":124,"time":1785078731282,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
 {"type":"assistant/chunk","seq":125,"time":1785498776312,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":239,"outputTokens":34,"cacheReadTokens":5376,"reasoningTokens":31}}}}
 {"type":"assistant/chunk","seq":126,"time":1785730429294,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":127,"time":1785730429294,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to fetch the URL, then reply with exactly \"DONE\". I've fetched it. Now I just reply with \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"c825fd85-3d0b-406c-9a89-dd8d918c352f"},"usage":{"inputTokens":239,"outputTokens":34,"cacheReadTokens":5376,"reasoningTokens":31}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":127,"time":1785730429294,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to fetch the URL, then reply with exactly \"DONE\". I've fetched it. Now I just reply with \"DONE\"."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-pro"},"id":"63a38279-bed6-48ff-8420-b8e72839f3be"},"usage":{"inputTokens":239,"outputTokens":34,"cacheReadTokens":5376,"reasoningTokens":31}},"sourceEventSeqs":[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],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl b/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl
index 766060cfce..415f5f6270 100644
--- a/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"583a4db2-3350-436c-b4a5-5615fd159052","createdAt":1783600636316,"cwd":"{{cwd}}","parentSession":"3fd7d599-56b1-493a-930d-f1fc5e1556e8","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498800317,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word WF_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"dbeb13af-583c-4c4d-89cf-7582bba6626a"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498800318,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730457307,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
-{"type":"turn/start","seq":3,"time":1785730457309,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498800317,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word WF_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f0f46771-663a-494a-8d40-6866a5bbe7c9"}]}}
+{"type":"turn/start","seq":1,"time":1785821416523,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821416523,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821416542,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
 {"type":"step/start","seq":4,"time":1785730457309,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730457309,"data":{"content":[{"type":"text","text":"Reply with exactly the word WF_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"dbeb13af-583c-4c4d-89cf-7582bba6626a"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730457309,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"21ae321f-c559-4343-811c-e38371f33e59"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730457309,"data":{"content":[{"type":"text","text":"Reply with exactly the word WF_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"f0f46771-663a-494a-8d40-6866a5bbe7c9"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730457309,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"e076edc0-a2bf-4fc6-aa58-d44bf1e8fd00"},"surfaceOp":"append"}
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 {"type":"request/context","seq":9,"time":1785730457310,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -17,6 +17,6 @@
 {"type":"assistant/chunk","seq":35,"time":1785498800343,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"WF_CHILD_OK"}}}}
 {"type":"assistant/chunk","seq":36,"time":1785730457316,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":17,"outputTokens":23,"cacheReadTokens":3072,"reasoningTokens":18}}}}
 {"type":"assistant/chunk","seq":37,"time":1785730457316,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":38,"time":1785730457316,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"WF_CHILD_OK\" and nothing else."},{"type":"text","text":"WF_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9d9ddf88-4151-42b7-8550-c20615a4dd82"},"usage":{"inputTokens":17,"outputTokens":23,"cacheReadTokens":3072,"reasoningTokens":18}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":38,"time":1785730457316,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"WF_CHILD_OK\" and nothing else."},{"type":"text","text":"WF_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0ddaf3d1-53dc-45df-bc19-54ad72d6d7fb"},"usage":{"inputTokens":17,"outputTokens":23,"cacheReadTokens":3072,"reasoningTokens":18}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":39,"time":1785730457316,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":40,"time":1785730457316,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl b/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl
index dc5fd0f45c..02952529b4 100644
--- a/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"3fd7d599-56b1-493a-930d-f1fc5e1556e8","createdAt":1783600631835,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498800123,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the workflow tool exactly once, with args omitted, meta set to { \"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\" }, and this EXACT script body (copy it verbatim):\nphase('Run')\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\nreturn { reply }\nAfter the workflow returns, reply with the single word WORKFLOW_DONE and stop. Do not use any other tool."}],"source":{"kind":"user"},"role":"user","id":"6560f64a-6378-444a-8f7a-bc3f06eb27c4"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498800123,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498800152,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498800123,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the workflow tool exactly once, with args omitted, meta set to { \"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\" }, and this EXACT script body (copy it verbatim):\nphase('Run')\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\nreturn { reply }\nAfter the workflow returns, reply with the single word WORKFLOW_DONE and stop. Do not use any other tool."}],"source":{"kind":"user"},"role":"user","id":"5188a9c7-d3ca-4679-b8df-1443e0a0a4df"}]}}
+{"type":"turn/start","seq":1,"time":1785821416248,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821416248,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783600631839,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498800152,"data":{"content":[{"type":"text","text":"Use the workflow tool exactly once, with args omitted, meta set to { \"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\" }, and this EXACT script body (copy it verbatim):\nphase('Run')\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\nreturn { reply }\nAfter the workflow returns, reply with the single word WORKFLOW_DONE and stop. Do not use any other tool."}],"source":{"kind":"user"},"role":"user","id":"6560f64a-6378-444a-8f7a-bc3f06eb27c4"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730457160,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"fff09744-1809-4f51-a41e-7c430abec3a5"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498800152,"data":{"content":[{"type":"text","text":"Use the workflow tool exactly once, with args omitted, meta set to { \"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\" }, and this EXACT script body (copy it verbatim):\nphase('Run')\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\nreturn { reply }\nAfter the workflow returns, reply with the single word WORKFLOW_DONE and stop. Do not use any other tool."}],"source":{"kind":"user"},"role":"user","id":"5188a9c7-d3ca-4679-b8df-1443e0a0a4df"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730457160,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"1c92c213-1d4f-45ad-be50-161f26a23e65"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730457160,"data":{"title":"Use the workflow tool exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498800153,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730457161,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,9 +16,9 @@
 {"type":"assistant/chunk","seq":161,"time":1783600636246,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_dD2BLuNeJCTh2iiYC1QR3449","name":"workflow","arguments":"{\"meta\": {\"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\"}, \"script\": \"\\nphase('Run')\\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\\nreturn { reply }\\n\"}"}}}}
 {"type":"assistant/chunk","seq":162,"time":1785498800167,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3174,"outputTokens":191,"cacheReadTokens":0,"reasoningTokens":88}}}}
 {"type":"assistant/chunk","seq":163,"time":1785730457174,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":164,"time":1785730457174,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the workflow tool exactly once with specific parameters. Let me carefully follow the instructions:\n\n1. args omitted (so I don't include it)\n2. meta = { \"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\" }\n3. script = as given verbatim\n4. After it returns, reply with \"WORKFLOW_DONE\"\n\nLet me do exactly that."},{"type":"tool-call","id":"call_00_dD2BLuNeJCTh2iiYC1QR3449","name":"workflow","arguments":"{\"meta\": {\"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\"}, \"script\": \"\\nphase('Run')\\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\\nreturn { reply }\\n\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"028a0da8-b691-4a5f-9434-acc36642b13e"},"usage":{"inputTokens":3174,"outputTokens":191,"cacheReadTokens":0,"reasoningTokens":88}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163],"surfaceOp":"append"}
+{"type":"assistant/message","seq":164,"time":1785730457174,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the workflow tool exactly once with specific parameters. Let me carefully follow the instructions:\n\n1. args omitted (so I don't include it)\n2. meta = { \"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\" }\n3. script = as given verbatim\n4. After it returns, reply with \"WORKFLOW_DONE\"\n\nLet me do exactly that."},{"type":"tool-call","id":"call_00_dD2BLuNeJCTh2iiYC1QR3449","name":"workflow","arguments":"{\"meta\": {\"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\"}, \"script\": \"\\nphase('Run')\\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\\nreturn { reply }\\n\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9a15ecb9-11ce-4d1b-9a0a-07cc388dc0e0"},"usage":{"inputTokens":3174,"outputTokens":191,"cacheReadTokens":0,"reasoningTokens":88}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163],"surfaceOp":"append"}
 {"type":"tool/call","seq":165,"time":1785730457174,"data":{"turn":1,"step":1,"callId":"call_00_dD2BLuNeJCTh2iiYC1QR3449","name":"workflow","arguments":"{\"meta\": {\"name\": \"snapshot-flow\", \"description\": \"one child for the snapshot\"}, \"script\": \"\\nphase('Run')\\nconst reply = await agent('Reply with exactly the word WF_CHILD_OK and nothing else.')\\nreturn { reply }\\n\"}"}}
-{"type":"tool/result","seq":166,"time":1785730457320,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_dD2BLuNeJCTh2iiYC1QR3449"},"content":[{"type":"tool-result","toolCallId":"call_00_dD2BLuNeJCTh2iiYC1QR3449","content":[{"type":"text","text":"workflow \"snapshot-flow\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WF_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"383ec120-0592-4af8-b120-0665e30f8d7d"}},"sourceEventSeqs":[165],"surfaceOp":"append"}
+{"type":"tool/result","seq":166,"time":1785730457320,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_dD2BLuNeJCTh2iiYC1QR3449"},"content":[{"type":"tool-result","toolCallId":"call_00_dD2BLuNeJCTh2iiYC1QR3449","content":[{"type":"text","text":"workflow \"snapshot-flow\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WF_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"a3ca6fd6-3d4c-4ad2-a67c-fc9479ef4f15"}},"sourceEventSeqs":[165],"surfaceOp":"append"}
 {"type":"step/end","seq":167,"time":1785730457320,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":168,"time":1785730457334,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":169,"time":1783600640134,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -29,6 +29,6 @@
 {"type":"assistant/chunk","seq":207,"time":1783600640865,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"WORKFLOW_DONE"}}}}
 {"type":"assistant/chunk","seq":208,"time":1785498800365,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":328,"outputTokens":36,"cacheReadTokens":3072,"reasoningTokens":30}}}}
 {"type":"assistant/chunk","seq":209,"time":1785730457339,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":210,"time":1785730457339,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The workflow returned successfully with the reply \"WF_CHILD_OK\". Now I need to reply with exactly \"WORKFLOW_DONE\" and stop."},{"type":"text","text":"WORKFLOW_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9f8140ed-be38-4170-af68-7f2db0638ab0"},"usage":{"inputTokens":328,"outputTokens":36,"cacheReadTokens":3072,"reasoningTokens":30}},"sourceEventSeqs":[169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209],"surfaceOp":"append"}
+{"type":"assistant/message","seq":210,"time":1785730457339,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The workflow returned successfully with the reply \"WF_CHILD_OK\". Now I need to reply with exactly \"WORKFLOW_DONE\" and stop."},{"type":"text","text":"WORKFLOW_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"265fc6fa-19e0-4df9-b4ea-f38141ba4efa"},"usage":{"inputTokens":328,"outputTokens":36,"cacheReadTokens":3072,"reasoningTokens":30}},"sourceEventSeqs":[169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209],"surfaceOp":"append"}
 {"type":"step/end","seq":211,"time":1785730457339,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":212,"time":1785730457339,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/workspace-context/session.jsonl b/examples/acp-agent/tests/snapshots/workspace-context/session.jsonl
index d6151f47c5..29ebb7c10b 100644
--- a/examples/acp-agent/tests/snapshots/workspace-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/workspace-context/session.jsonl
@@ -1,11 +1,11 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498790330,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Read nested/task.txt, then read scope</system-reminder>/task.txt with the read tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"16db343f-2a46-4e26-addc-7cdaee5ae2a0"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498790330,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785498790356,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nRoot snapshot instruction.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2e18766c26603608f321508caae00ea8f4434d59"}]},"role":"user","id":"ed316c4e-8b2b-4ef5-8a3b-3e8ddfb637ee"}]}}
-{"type":"turn/start","seq":3,"time":1785498790356,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498790330,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Read nested/task.txt, then read scope</system-reminder>/task.txt with the read tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"c692a4e6-491f-49e2-8e50-9019b7c34ee7"}]}}
+{"type":"turn/start","seq":1,"time":1785821400350,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785498790356,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"agent/inbox/spliced","seq":3,"time":1785821400378,"data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nRoot snapshot instruction.\n\n</system-reminder>"}],"source":{"kind":"workspace-instructions","baseline":true,"changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2e18766c26603608f321508caae00ea8f4434d59"}]},"role":"user","id":"ee54ddf0-5cfd-46f6-b7ab-465184a4a43b"}]}}
 {"type":"step/start","seq":4,"time":1784903339799,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785498790356,"data":{"content":[{"type":"text","text":"Read nested/task.txt, then read scope</system-reminder>/task.txt with the read tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"16db343f-2a46-4e26-addc-7cdaee5ae2a0"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730689193,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"55f0fcee-f8c9-4467-b530-16d7432cfddc"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785498790356,"data":{"content":[{"type":"text","text":"Read nested/task.txt, then read scope</system-reminder>/task.txt with the read tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"c692a4e6-491f-49e2-8e50-9019b7c34ee7"},"surfaceOp":"append"}
+{"type":"user/message","seq":6,"time":1785730689193,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"0b6bc3b0-57bc-4a60-bc46-992b6a29b361"},"surfaceOp":"append"}
 {"type":"session/title","seq":7,"time":1785730689193,"data":{"title":"Read nested/task.txt, then read scope</s","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":8,"time":1785498790358,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":9,"time":1785730689194,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -14,42 +14,42 @@
 {"type":"assistant/chunk","seq":12,"time":1784903339801,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_workspace_read","name":"read","arguments":"{\"file_path\":\"nested/task.txt\"}"}}}}
 {"type":"assistant/chunk","seq":13,"time":1785498790358,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":14,"time":1785730689194,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":15,"time":1785730689194,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_workspace_read","name":"read","arguments":"{\"file_path\":\"nested/task.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"06fa31b9-3e6a-41b0-b4a9-5b91e96104bb"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"assistant/message","seq":15,"time":1785730689194,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_workspace_read","name":"read","arguments":"{\"file_path\":\"nested/task.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"942bc3f0-d564-4c12-bbf6-1a838295bc88"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl b/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl
index 25738d99f8..416597cf36 100644
--- a/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"48aca674-000a-4583-810b-01f8785cef13","createdAt":1783352264076,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498777332,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"A file named greeting.txt in the current directory contains one word. Use the bash tool to append a second line containing the word WORLD to it (so it has two lines), then read the file back with `cat greeting.txt` to confirm, and reply with the single word DONE. Use a single bash call per action."}],"source":{"kind":"user"},"role":"user","id":"16645738-eb6a-49a1-ba4f-a43ac66ad9d2"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498777333,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498777358,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498777332,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"A file named greeting.txt in the current directory contains one word. Use the bash tool to append a second line containing the word WORLD to it (so it has two lines), then read the file back with `cat greeting.txt` to confirm, and reply with the single word DONE. Use a single bash call per action."}],"source":{"kind":"user"},"role":"user","id":"96726dec-a718-4009-ba60-c2b856fe2e6f"}]}}
+{"type":"turn/start","seq":1,"time":1785821383408,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821383408,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783352264082,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498777358,"data":{"content":[{"type":"text","text":"A file named greeting.txt in the current directory contains one word. Use the bash tool to append a second line containing the word WORLD to it (so it has two lines), then read the file back with `cat greeting.txt` to confirm, and reply with the single word DONE. Use a single bash call per action."}],"source":{"kind":"user"},"role":"user","id":"16645738-eb6a-49a1-ba4f-a43ac66ad9d2"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730430363,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"3b217261-bbad-44c2-9f31-3fd5124a2335"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498777358,"data":{"content":[{"type":"text","text":"A file named greeting.txt in the current directory contains one word. Use the bash tool to append a second line containing the word WORLD to it (so it has two lines), then read the file back with `cat greeting.txt` to confirm, and reply with the single word DONE. Use a single bash call per action."}],"source":{"kind":"user"},"role":"user","id":"96726dec-a718-4009-ba60-c2b856fe2e6f"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730430363,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"ff8d8fb0-6bd9-4484-9406-0548c71cca4f"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730430363,"data":{"title":"A file named greeting.txt in","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498777360,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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@@ -16,9 +16,9 @@
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+{"type":"assistant/message","seq":83,"time":1785730430375,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to:\n1. Read the file greeting.txt\n2. Append the word WORLD as a second line\n3. Read the file back with cat to confirm\n4. Reply with DONE\n\nLet me start by reading the file to see its contents."},{"type":"tool-call","id":"call_00_OjRFB4zvxu6UALDjytZD0978","name":"read","arguments":"{\"file_path\": \"greeting.txt\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ed0c1fe3-3813-4f27-80b9-325b0b31e51c"},"usage":{"inputTokens":2918,"outputTokens":101,"cacheReadTokens":0,"reasoningTokens":55}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82],"surfaceOp":"append"}
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@@ -29,9 +29,9 @@
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@@ -42,9 +42,9 @@
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+{"type":"assistant/message","seq":207,"time":1785730430430,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Good, now let me read the file back with cat."},{"type":"tool-call","id":"call_00_Wo4H7tFNheZJWKVDrAHK5851","name":"bash","arguments":"{\"command\": \"cat greeting.txt\", \"description\": \"Read greeting.txt to confirm\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"daa2cdd5-7f59-4e28-af51-5c7f0864ef1d"},"usage":{"inputTokens":126,"outputTokens":77,"cacheReadTokens":3072,"reasoningTokens":12}},"sourceEventSeqs":[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],"surfaceOp":"append"}
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@@ -56,6 +56,6 @@
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diff --git a/examples/headless-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
index a4f9f8a004..7d46f3828f 100644
--- a/examples/headless-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
@@ -9,8 +9,8 @@
 {"type":"turn/end","seq":7,"time":0,"data":{"turn":1,"step":1,"reason":{"kind":"interrupted"}}}
 {"type":"session/end-seed","seq":8,"time":0,"data":{}}
 {"type":"agent/inbox/spliced","seq":9,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":10,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":11,"time":0,"data":{"turn":2}}
+{"type":"turn/start","seq":10,"time":0,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":11,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":12,"time":0,"data":{"turn":2,"step":1}}
 {"type":"user/message","seq":13,"time":0,"data":{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"session/title","seq":14,"time":0,"data":{"title":"Perform one side-effecting remote mutati","messageSeqs":[1],"source":{"kind":"fallback"}}}
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
index b6de747ffd..bf9f727989 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":1783950001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498583877,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ed372a9f-39da-4f7c-98d3-b361c8fa388e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498583878,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730501505,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
-{"type":"turn/start","seq":3,"time":1785730501506,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498583877,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"fc62f9e7-b8f6-441f-9ee8-17f1f9e4feca"}]}}
+{"type":"turn/start","seq":1,"time":1785821454445,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821454445,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821454466,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
 {"type":"step/start","seq":4,"time":1785730501506,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730501506,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ed372a9f-39da-4f7c-98d3-b361c8fa388e"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730501506,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"fc62f9e7-b8f6-441f-9ee8-17f1f9e4feca"},"surfaceOp":"append"}
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 {"type":"request/header","seq":7,"time":1785498583897,"data":{"header":{"config":{"provider":"deepseek-official","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. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\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\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.\n\n## Writing code for run_code\n\nPass `run_code` the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped). Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** 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`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** 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\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Inspect the live Cordis runtime in the current DSH process. Read-only. Sections: `services` (every provided ctx service and the plugin fiber that owns it), `plugins` (all live plugin fibers with their lifecycle states), `tools` (the model-facing tools currently registered, i.e. what you can call), `temporary` (only temporary Plugins created by cordis_mount: id, name, state, provided services, awaited services, and lifetime), `api` (method signatures AND argument/return type shapes for every LIVE service — read this before writing plugin code that calls a service), `events` (every harness event with its dispatch mode and exact signature — pick listener targets here). Temporary Plugins exist only in memory, remain active across later turns, and disappear after cordis_unmount, toolset unload, or DSH restart; they are not restored automatically. The `temporary` section is a subset of `plugins`. Omit `what` to get all six sections. With `what:\"api\"` or `what:\"events\"`, pass an exact `name` to narrow to one service/event and include its original source JSDoc. */\n  cordis_inspect: {\n    /** Limit the report to one section. Omit for all sections. */\n    what?: \"services\" | \"plugins\" | \"tools\" | \"temporary\" | \"api\" | \"events\";\n    /** Exact service key or event name whose original JSDoc to include; valid only with what:\"api\" or what:\"events\". */\n    name?: string;\n  } & Record<string, JsonValue>;\n  /** Mount a temporary Cordis Plugin in the current DSH process. This creates an in-memory runtime Plugin, not an installed or configured Plugin. It remains active across later turns until cordis_unmount, toolset unload, or DSH restart. It does not create files, install a package, change cordis.yml or personal/project config, survive restart, or automatically become permanent. To keep it, ask the Agent to implement a normal local, project, or repository Plugin through the regular development workflow. It may affect other sessions in the same process; the sandbox is not a security boundary, and injected services reach the real runtime. `code` runs now as the body of an async JavaScript function in an isolated sandbox and MUST `return` a plugin. Two forms: FUNCTION form `return (ctx) => { … }` — declares no inject, so it can register tools, listen to events, and provide services, but reaching ANY service (e.g. ctx.bash) throws; use it only when you need no services. OBJECT form `return { name?, inject: ['bash', 'llm', …], apply(ctx) { … } }` — declares dependencies, and cordis activates the plugin only after the services exist; PREFER this form. You may reach ONLY the services you list in inject: an undeclared service throws even if it exists, because an undeclared dependency would not be cleaned up if its provider is unmounted. BEFORE calling a service from your code, read cordis_inspect what:\"api\" — it lists method signatures AND the type shapes of their arguments/returns (do not guess a field's type; e.g. a bash run's stdout is an object, not a string). Inside `apply`, use the standard cordis API: `ctx.on(event, listener)` to observe events (see cordis_inspect what:\"events\"), or call `harness.registerTool(ctx, harness.defineTool({ name, description, parameters: { text: { type: 'string', required: true } }, output: { schema: { type: 'string' }, render(_args, value) { return [{ type: 'text', text: value }] } }, async execute(args) { return args.text } }))` to give yourself a new tool — it becomes callable on your NEXT step. Tool parameters: each key IS a property — { type: 'string'|'number'|'integer'|'boolean'|'null'|'object'|'array'|'json', required?: true, description?, enum?, const?, items?, properties? }; every direct DSL object declares additionalProperties: true|false, and oneOf: [schema, schema, ...] replaces type for an exact-one union. A raw JSON-Schema { type: 'object', properties, required?: […] } wrapper is also accepted with open-by-default objects. A tool's `execute` MUST return the lossless JSON value declared by `output.schema`; `output.render(args, value)` separately returns Native/model content blocks. Temporary Plugins can COMPOSE: one Plugin may `ctx.provide('name', value)` a service and another may declare `inject: ['name']` to consume it — the consumer stays pending until the provider exists and returns to pending when the provider is unmounted. Everything registered inside `apply` is cleaned up automatically by cordis_unmount. Sandbox globals: `console` (tagged `[cordis:<id>]`, writes through to the harness terminal), `harness.defineTool`, `harness.registerTool`, `btoa`, `atob`, `TextEncoder`, `TextDecoder`. Node APIs are DISABLED — do filesystem/network/timer work through the cordis services, never Node built-ins: `require`, `setTimeout`/`setInterval`, and `fetch` throw redirect errors; `process` and `Buffer` are undefined. Instead use inject: ['fs'] + ctx.fs for files, inject: ['web'] + ctx.web for HTTP, inject: ['bash'] + ctx.bash for processes, and inject: ['timer'] + ctx.setTimeout/ctx.setInterval for timing (fiber effects, auto-cleaned when unmounted) — cordis_inspect what:\"api\" shows what THIS runtime provides. Write PLAIN JavaScript, not TypeScript (no `as`, no type annotations). Cautions: (1) waterfall events (e.g. tools/pre-execute) hand the listener a trailing `next` callback which MUST be called — returning without `next()` VETOES the call; prefer plain notification events unless you intend to intercept. (2) Never await something that only resolves after the current turn (your code runs INSIDE a tool call of that turn — it would deadlock). (3) Your `ctx` is a restricted façade: you can register tools, observe events, provide/consume services, and use timers, but framework internals (ctx.root, ctx.fiber, ctx.extend, ctx.plugin, …) are withheld. It is not a security boundary though — the services you inject (e.g. ctx.bash) reach the real runtime. */\n  cordis_mount: {\n    /** JavaScript body returning a temporary Plugin; evaluated now and saved nowhere. */\n    code: string;\n  } & Record<string, JsonValue>;\n  /** Unmount a current-process temporary Plugin created by cordis_mount. Waits for its tools, listeners, services, timers, and other owned effects to clean up completely. Only dyn-N temporary ids are accepted; this cannot remove Loader, configured, or installed Plugins. */\n  cordis_unmount: {\n    /** The temporary Plugin id returned by cordis_mount (for example \"dyn-1\"); valid only in this process and invalid after unmount or restart. */\n    id: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** 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. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** 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. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** 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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** 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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops. */\n  task_kill: {\n    /** Task id returned by the tool that started the background work. */\n    task_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the task. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background tasks (running and finished) with their ids, kinds, and statuses. */\n  task_list: Record<string, JsonValue>;\n  /** 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. */\n  task_output: {\n    /** Task id returned by the tool that started the background work. */\n    task_id: string;\n    /** Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** 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). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** 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. The 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. Script-body hooks: - `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. - `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. - `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`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: 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. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_inspect: string;\n  cordis_mount: {\n    id: string;\n    pluginName: string;\n    state: \"pending\" | \"loading\" | \"active\" | \"failed\" | \"disposed\" | \"unloading\";\n    provides: string[];\n    waitingFor: string[];\n  };\n  cordis_unmount: {\n    id: string;\n    pluginName: string;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  task_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    task: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  task_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  task_output: {\n    text: string;\n    task: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","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":"cordis_inspect","description":"Inspect the live Cordis runtime in the current DSH process. Read-only. Sections: `services` (every provided ctx service and the plugin fiber that owns it), `plugins` (all live plugin fibers with their lifecycle states), `tools` (the model-facing tools currently registered, i.e. what you can call), `temporary` (only temporary Plugins created by cordis_mount: id, name, state, provided services, awaited services, and lifetime), `api` (method signatures AND argument/return type shapes for every LIVE service — read this before writing plugin code that calls a service), `events` (every harness event with its dispatch mode and exact signature — pick listener targets here). Temporary Plugins exist only in memory, remain active across later turns, and disappear after cordis_unmount, toolset unload, or DSH restart; they are not restored automatically. The `temporary` section is a subset of `plugins`. Omit `what` to get all six sections. With `what:\"api\"` or `what:\"events\"`, pass an exact `name` to narrow to one service/event and include its original source JSDoc.","parameters":{"type":"object","properties":{"what":{"type":"string","description":"Limit the report to one section. Omit for all sections.","enum":["services","plugins","tools","temporary","api","events"]},"name":{"type":"string","description":"Exact service key or event name whose original JSDoc to include; valid only with what:\"api\" or what:\"events\"."}}}},{"name":"cordis_mount","description":"Mount a temporary Cordis Plugin in the current DSH process. This creates an in-memory runtime Plugin, not an installed or configured Plugin. It remains active across later turns until cordis_unmount, toolset unload, or DSH restart. It does not create files, install a package, change cordis.yml or personal/project config, survive restart, or automatically become permanent. To keep it, ask the Agent to implement a normal local, project, or repository Plugin through the regular development workflow. It may affect other sessions in the same process; the sandbox is not a security boundary, and injected services reach the real runtime. `code` runs now as the body of an async JavaScript function in an isolated sandbox and MUST `return` a plugin. Two forms: FUNCTION form `return (ctx) => { … }` — declares no inject, so it can register tools, listen to events, and provide services, but reaching ANY service (e.g. ctx.bash) throws; use it only when you need no services. OBJECT form `return { name?, inject: ['bash', 'llm', …], apply(ctx) { … } }` — declares dependencies, and cordis activates the plugin only after the services exist; PREFER this form. You may reach ONLY the services you list in inject: an undeclared service throws even if it exists, because an undeclared dependency would not be cleaned up if its provider is unmounted. BEFORE calling a service from your code, read cordis_inspect what:\"api\" — it lists method signatures AND the type shapes of their arguments/returns (do not guess a field's type; e.g. a bash run's stdout is an object, not a string). Inside `apply`, use the standard cordis API: `ctx.on(event, listener)` to observe events (see cordis_inspect what:\"events\"), or call `harness.registerTool(ctx, harness.defineTool({ name, description, parameters: { text: { type: 'string', required: true } }, output: { schema: { type: 'string' }, render(_args, value) { return [{ type: 'text', text: value }] } }, async execute(args) { return args.text } }))` to give yourself a new tool — it becomes callable on your NEXT step. Tool parameters: each key IS a property — { type: 'string'|'number'|'integer'|'boolean'|'null'|'object'|'array'|'json', required?: true, description?, enum?, const?, items?, properties? }; every direct DSL object declares additionalProperties: true|false, and oneOf: [schema, schema, ...] replaces type for an exact-one union. A raw JSON-Schema { type: 'object', properties, required?: […] } wrapper is also accepted with open-by-default objects. A tool's `execute` MUST return the lossless JSON value declared by `output.schema`; `output.render(args, value)` separately returns Native/model content blocks. Temporary Plugins can COMPOSE: one Plugin may `ctx.provide('name', value)` a service and another may declare `inject: ['name']` to consume it — the consumer stays pending until the provider exists and returns to pending when the provider is unmounted. Everything registered inside `apply` is cleaned up automatically by cordis_unmount. Sandbox globals: `console` (tagged `[cordis:<id>]`, writes through to the harness terminal), `harness.defineTool`, `harness.registerTool`, `btoa`, `atob`, `TextEncoder`, `TextDecoder`. Node APIs are DISABLED — do filesystem/network/timer work through the cordis services, never Node built-ins: `require`, `setTimeout`/`setInterval`, and `fetch` throw redirect errors; `process` and `Buffer` are undefined. Instead use inject: ['fs'] + ctx.fs for files, inject: ['web'] + ctx.web for HTTP, inject: ['bash'] + ctx.bash for processes, and inject: ['timer'] + ctx.setTimeout/ctx.setInterval for timing (fiber effects, auto-cleaned when unmounted) — cordis_inspect what:\"api\" shows what THIS runtime provides. Write PLAIN JavaScript, not TypeScript (no `as`, no type annotations). Cautions: (1) waterfall events (e.g. tools/pre-execute) hand the listener a trailing `next` callback which MUST be called — returning without `next()` VETOES the call; prefer plain notification events unless you intend to intercept. (2) Never await something that only resolves after the current turn (your code runs INSIDE a tool call of that turn — it would deadlock). (3) Your `ctx` is a restricted façade: you can register tools, observe events, provide/consume services, and use timers, but framework internals (ctx.root, ctx.fiber, ctx.extend, ctx.plugin, …) are withheld. It is not a security boundary though — the services you inject (e.g. ctx.bash) reach the real runtime.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"JavaScript body returning a temporary Plugin; evaluated now and saved nowhere."}},"required":["code"]}},{"name":"cordis_unmount","description":"Unmount a current-process temporary Plugin created by cordis_mount. Waits for its tools, listeners, services, timers, and other owned effects to clean up completely. Only dyn-N temporary ids are accepted; this cannot remove Loader, configured, or installed Plugins.","parameters":{"type":"object","properties":{"id":{"type":"string","description":"The temporary Plugin id returned by cordis_mount (for example \"dyn-1\"); valid only in this process and invalid after unmount or restart."}},"required":["id"]}},{"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":"run_code","description":"Execute a TypeScript program against the available tools. Write the BODY of an async function (erasable syntax only; top-level `await` and `return` work) and call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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":false,"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":"request/context","seq":8,"time":1785730501507,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,6 +13,6 @@
 {"type":"assistant/chunk","seq":11,"time":1783957884564,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785498583897,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730501507,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":14,"time":1785730501507,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"833a1c69-63e7-48ce-b0dd-2124d00ca4b3"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730501507,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cac680cf-1d70-4fb2-91a3-da1e3a317d2e"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"step/end","seq":15,"time":1785730501507,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":16,"time":1785730501507,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
index 97aa2cd48e..1b5481bcf4 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1783950002000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498584048,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a677583-32d7-4d2b-85e2-81f9107c9c9c"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498584048,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730501644,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
-{"type":"turn/start","seq":3,"time":1785730501645,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498584048,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"093bfc20-c6fc-4573-b172-2c6ca40c188b"}]}}
+{"type":"turn/start","seq":1,"time":1785821454599,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821454599,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821454618,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
 {"type":"step/start","seq":4,"time":1785730501645,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730501645,"data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a677583-32d7-4d2b-85e2-81f9107c9c9c"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730501645,"data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"093bfc20-c6fc-4573-b172-2c6ca40c188b"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730501645,"data":{"title":"Reply with exactly WORKFLOW_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498584067,"data":{"header":{"config":{"provider":"deepseek-official","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. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\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\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.\n\n## Writing code for run_code\n\nPass `run_code` the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped). Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** 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`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** 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\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Inspect the live Cordis runtime in the current DSH process. Read-only. Sections: `services` (every provided ctx service and the plugin fiber that owns it), `plugins` (all live plugin fibers with their lifecycle states), `tools` (the model-facing tools currently registered, i.e. what you can call), `temporary` (only temporary Plugins created by cordis_mount: id, name, state, provided services, awaited services, and lifetime), `api` (method signatures AND argument/return type shapes for every LIVE service — read this before writing plugin code that calls a service), `events` (every harness event with its dispatch mode and exact signature — pick listener targets here). Temporary Plugins exist only in memory, remain active across later turns, and disappear after cordis_unmount, toolset unload, or DSH restart; they are not restored automatically. The `temporary` section is a subset of `plugins`. Omit `what` to get all six sections. With `what:\"api\"` or `what:\"events\"`, pass an exact `name` to narrow to one service/event and include its original source JSDoc. */\n  cordis_inspect: {\n    /** Limit the report to one section. Omit for all sections. */\n    what?: \"services\" | \"plugins\" | \"tools\" | \"temporary\" | \"api\" | \"events\";\n    /** Exact service key or event name whose original JSDoc to include; valid only with what:\"api\" or what:\"events\". */\n    name?: string;\n  } & Record<string, JsonValue>;\n  /** Mount a temporary Cordis Plugin in the current DSH process. This creates an in-memory runtime Plugin, not an installed or configured Plugin. It remains active across later turns until cordis_unmount, toolset unload, or DSH restart. It does not create files, install a package, change cordis.yml or personal/project config, survive restart, or automatically become permanent. To keep it, ask the Agent to implement a normal local, project, or repository Plugin through the regular development workflow. It may affect other sessions in the same process; the sandbox is not a security boundary, and injected services reach the real runtime. `code` runs now as the body of an async JavaScript function in an isolated sandbox and MUST `return` a plugin. Two forms: FUNCTION form `return (ctx) => { … }` — declares no inject, so it can register tools, listen to events, and provide services, but reaching ANY service (e.g. ctx.bash) throws; use it only when you need no services. OBJECT form `return { name?, inject: ['bash', 'llm', …], apply(ctx) { … } }` — declares dependencies, and cordis activates the plugin only after the services exist; PREFER this form. You may reach ONLY the services you list in inject: an undeclared service throws even if it exists, because an undeclared dependency would not be cleaned up if its provider is unmounted. BEFORE calling a service from your code, read cordis_inspect what:\"api\" — it lists method signatures AND the type shapes of their arguments/returns (do not guess a field's type; e.g. a bash run's stdout is an object, not a string). Inside `apply`, use the standard cordis API: `ctx.on(event, listener)` to observe events (see cordis_inspect what:\"events\"), or call `harness.registerTool(ctx, harness.defineTool({ name, description, parameters: { text: { type: 'string', required: true } }, output: { schema: { type: 'string' }, render(_args, value) { return [{ type: 'text', text: value }] } }, async execute(args) { return args.text } }))` to give yourself a new tool — it becomes callable on your NEXT step. Tool parameters: each key IS a property — { type: 'string'|'number'|'integer'|'boolean'|'null'|'object'|'array'|'json', required?: true, description?, enum?, const?, items?, properties? }; every direct DSL object declares additionalProperties: true|false, and oneOf: [schema, schema, ...] replaces type for an exact-one union. A raw JSON-Schema { type: 'object', properties, required?: […] } wrapper is also accepted with open-by-default objects. A tool's `execute` MUST return the lossless JSON value declared by `output.schema`; `output.render(args, value)` separately returns Native/model content blocks. Temporary Plugins can COMPOSE: one Plugin may `ctx.provide('name', value)` a service and another may declare `inject: ['name']` to consume it — the consumer stays pending until the provider exists and returns to pending when the provider is unmounted. Everything registered inside `apply` is cleaned up automatically by cordis_unmount. Sandbox globals: `console` (tagged `[cordis:<id>]`, writes through to the harness terminal), `harness.defineTool`, `harness.registerTool`, `btoa`, `atob`, `TextEncoder`, `TextDecoder`. Node APIs are DISABLED — do filesystem/network/timer work through the cordis services, never Node built-ins: `require`, `setTimeout`/`setInterval`, and `fetch` throw redirect errors; `process` and `Buffer` are undefined. Instead use inject: ['fs'] + ctx.fs for files, inject: ['web'] + ctx.web for HTTP, inject: ['bash'] + ctx.bash for processes, and inject: ['timer'] + ctx.setTimeout/ctx.setInterval for timing (fiber effects, auto-cleaned when unmounted) — cordis_inspect what:\"api\" shows what THIS runtime provides. Write PLAIN JavaScript, not TypeScript (no `as`, no type annotations). Cautions: (1) waterfall events (e.g. tools/pre-execute) hand the listener a trailing `next` callback which MUST be called — returning without `next()` VETOES the call; prefer plain notification events unless you intend to intercept. (2) Never await something that only resolves after the current turn (your code runs INSIDE a tool call of that turn — it would deadlock). (3) Your `ctx` is a restricted façade: you can register tools, observe events, provide/consume services, and use timers, but framework internals (ctx.root, ctx.fiber, ctx.extend, ctx.plugin, …) are withheld. It is not a security boundary though — the services you inject (e.g. ctx.bash) reach the real runtime. */\n  cordis_mount: {\n    /** JavaScript body returning a temporary Plugin; evaluated now and saved nowhere. */\n    code: string;\n  } & Record<string, JsonValue>;\n  /** Unmount a current-process temporary Plugin created by cordis_mount. Waits for its tools, listeners, services, timers, and other owned effects to clean up completely. Only dyn-N temporary ids are accepted; this cannot remove Loader, configured, or installed Plugins. */\n  cordis_unmount: {\n    /** The temporary Plugin id returned by cordis_mount (for example \"dyn-1\"); valid only in this process and invalid after unmount or restart. */\n    id: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** 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. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** 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. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** 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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** 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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops. */\n  task_kill: {\n    /** Task id returned by the tool that started the background work. */\n    task_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the task. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background tasks (running and finished) with their ids, kinds, and statuses. */\n  task_list: Record<string, JsonValue>;\n  /** 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. */\n  task_output: {\n    /** Task id returned by the tool that started the background work. */\n    task_id: string;\n    /** Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** 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). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** 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. The 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. Script-body hooks: - `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. - `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. - `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`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: 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. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_inspect: string;\n  cordis_mount: {\n    id: string;\n    pluginName: string;\n    state: \"pending\" | \"loading\" | \"active\" | \"failed\" | \"disposed\" | \"unloading\";\n    provides: string[];\n    waitingFor: string[];\n  };\n  cordis_unmount: {\n    id: string;\n    pluginName: string;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  task_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    task: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  task_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  task_output: {\n    text: string;\n    task: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","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":"cordis_inspect","description":"Inspect the live Cordis runtime in the current DSH process. Read-only. Sections: `services` (every provided ctx service and the plugin fiber that owns it), `plugins` (all live plugin fibers with their lifecycle states), `tools` (the model-facing tools currently registered, i.e. what you can call), `temporary` (only temporary Plugins created by cordis_mount: id, name, state, provided services, awaited services, and lifetime), `api` (method signatures AND argument/return type shapes for every LIVE service — read this before writing plugin code that calls a service), `events` (every harness event with its dispatch mode and exact signature — pick listener targets here). Temporary Plugins exist only in memory, remain active across later turns, and disappear after cordis_unmount, toolset unload, or DSH restart; they are not restored automatically. The `temporary` section is a subset of `plugins`. Omit `what` to get all six sections. With `what:\"api\"` or `what:\"events\"`, pass an exact `name` to narrow to one service/event and include its original source JSDoc.","parameters":{"type":"object","properties":{"what":{"type":"string","description":"Limit the report to one section. Omit for all sections.","enum":["services","plugins","tools","temporary","api","events"]},"name":{"type":"string","description":"Exact service key or event name whose original JSDoc to include; valid only with what:\"api\" or what:\"events\"."}}}},{"name":"cordis_mount","description":"Mount a temporary Cordis Plugin in the current DSH process. This creates an in-memory runtime Plugin, not an installed or configured Plugin. It remains active across later turns until cordis_unmount, toolset unload, or DSH restart. It does not create files, install a package, change cordis.yml or personal/project config, survive restart, or automatically become permanent. To keep it, ask the Agent to implement a normal local, project, or repository Plugin through the regular development workflow. It may affect other sessions in the same process; the sandbox is not a security boundary, and injected services reach the real runtime. `code` runs now as the body of an async JavaScript function in an isolated sandbox and MUST `return` a plugin. Two forms: FUNCTION form `return (ctx) => { … }` — declares no inject, so it can register tools, listen to events, and provide services, but reaching ANY service (e.g. ctx.bash) throws; use it only when you need no services. OBJECT form `return { name?, inject: ['bash', 'llm', …], apply(ctx) { … } }` — declares dependencies, and cordis activates the plugin only after the services exist; PREFER this form. You may reach ONLY the services you list in inject: an undeclared service throws even if it exists, because an undeclared dependency would not be cleaned up if its provider is unmounted. BEFORE calling a service from your code, read cordis_inspect what:\"api\" — it lists method signatures AND the type shapes of their arguments/returns (do not guess a field's type; e.g. a bash run's stdout is an object, not a string). Inside `apply`, use the standard cordis API: `ctx.on(event, listener)` to observe events (see cordis_inspect what:\"events\"), or call `harness.registerTool(ctx, harness.defineTool({ name, description, parameters: { text: { type: 'string', required: true } }, output: { schema: { type: 'string' }, render(_args, value) { return [{ type: 'text', text: value }] } }, async execute(args) { return args.text } }))` to give yourself a new tool — it becomes callable on your NEXT step. Tool parameters: each key IS a property — { type: 'string'|'number'|'integer'|'boolean'|'null'|'object'|'array'|'json', required?: true, description?, enum?, const?, items?, properties? }; every direct DSL object declares additionalProperties: true|false, and oneOf: [schema, schema, ...] replaces type for an exact-one union. A raw JSON-Schema { type: 'object', properties, required?: […] } wrapper is also accepted with open-by-default objects. A tool's `execute` MUST return the lossless JSON value declared by `output.schema`; `output.render(args, value)` separately returns Native/model content blocks. Temporary Plugins can COMPOSE: one Plugin may `ctx.provide('name', value)` a service and another may declare `inject: ['name']` to consume it — the consumer stays pending until the provider exists and returns to pending when the provider is unmounted. Everything registered inside `apply` is cleaned up automatically by cordis_unmount. Sandbox globals: `console` (tagged `[cordis:<id>]`, writes through to the harness terminal), `harness.defineTool`, `harness.registerTool`, `btoa`, `atob`, `TextEncoder`, `TextDecoder`. Node APIs are DISABLED — do filesystem/network/timer work through the cordis services, never Node built-ins: `require`, `setTimeout`/`setInterval`, and `fetch` throw redirect errors; `process` and `Buffer` are undefined. Instead use inject: ['fs'] + ctx.fs for files, inject: ['web'] + ctx.web for HTTP, inject: ['bash'] + ctx.bash for processes, and inject: ['timer'] + ctx.setTimeout/ctx.setInterval for timing (fiber effects, auto-cleaned when unmounted) — cordis_inspect what:\"api\" shows what THIS runtime provides. Write PLAIN JavaScript, not TypeScript (no `as`, no type annotations). Cautions: (1) waterfall events (e.g. tools/pre-execute) hand the listener a trailing `next` callback which MUST be called — returning without `next()` VETOES the call; prefer plain notification events unless you intend to intercept. (2) Never await something that only resolves after the current turn (your code runs INSIDE a tool call of that turn — it would deadlock). (3) Your `ctx` is a restricted façade: you can register tools, observe events, provide/consume services, and use timers, but framework internals (ctx.root, ctx.fiber, ctx.extend, ctx.plugin, …) are withheld. It is not a security boundary though — the services you inject (e.g. ctx.bash) reach the real runtime.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"JavaScript body returning a temporary Plugin; evaluated now and saved nowhere."}},"required":["code"]}},{"name":"cordis_unmount","description":"Unmount a current-process temporary Plugin created by cordis_mount. Waits for its tools, listeners, services, timers, and other owned effects to clean up completely. Only dyn-N temporary ids are accepted; this cannot remove Loader, configured, or installed Plugins.","parameters":{"type":"object","properties":{"id":{"type":"string","description":"The temporary Plugin id returned by cordis_mount (for example \"dyn-1\"); valid only in this process and invalid after unmount or restart."}},"required":["id"]}},{"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":"run_code","description":"Execute a TypeScript program against the available tools. Write the BODY of an async function (erasable syntax only; top-level `await` and `return` work) and call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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":false,"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":"request/context","seq":8,"time":1785730501646,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,6 +13,6 @@
 {"type":"assistant/chunk","seq":11,"time":1783957884701,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"WORKFLOW_CHILD_OK"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785498584067,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730501646,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":14,"time":1785730501646,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e92e2a10-407f-4acb-9e36-95af55857c61"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730501646,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2b31dae5-8939-44e1-bbcd-9f64aa637d76"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"step/end","seq":15,"time":1785730501646,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":16,"time":1785730501646,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
index 4ed7affdef..e2aae31f3c 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
@@ -1,9 +1,9 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1783950000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498583746,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"f7585768-5699-4ec8-851c-932718e20e89"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498583747,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498583779,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498583746,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"d2f4f71c-78bc-4a22-908d-c08fbb3ab9ef"}]}}
+{"type":"turn/start","seq":1,"time":1785821454304,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821454304,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1783957884486,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498583779,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"f7585768-5699-4ec8-851c-932718e20e89"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498583779,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"d2f4f71c-78bc-4a22-908d-c08fbb3ab9ef"},"surfaceOp":"append"}
 {"type":"session/title","seq":5,"time":1785498583779,"data":{"title":"Run this advanced flow exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":6,"time":1785498583782,"data":{"header":{"config":{"provider":"deepseek-official","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. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\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\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.\n\n## Writing code for run_code\n\nPass `run_code` the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped). Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** 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`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** 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\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Inspect the live Cordis runtime in the current DSH process. Read-only. Sections: `services` (every provided ctx service and the plugin fiber that owns it), `plugins` (all live plugin fibers with their lifecycle states), `tools` (the model-facing tools currently registered, i.e. what you can call), `temporary` (only temporary Plugins created by cordis_mount: id, name, state, provided services, awaited services, and lifetime), `api` (method signatures AND argument/return type shapes for every LIVE service — read this before writing plugin code that calls a service), `events` (every harness event with its dispatch mode and exact signature — pick listener targets here). Temporary Plugins exist only in memory, remain active across later turns, and disappear after cordis_unmount, toolset unload, or DSH restart; they are not restored automatically. The `temporary` section is a subset of `plugins`. Omit `what` to get all six sections. With `what:\"api\"` or `what:\"events\"`, pass an exact `name` to narrow to one service/event and include its original source JSDoc. */\n  cordis_inspect: {\n    /** Limit the report to one section. Omit for all sections. */\n    what?: \"services\" | \"plugins\" | \"tools\" | \"temporary\" | \"api\" | \"events\";\n    /** Exact service key or event name whose original JSDoc to include; valid only with what:\"api\" or what:\"events\". */\n    name?: string;\n  } & Record<string, JsonValue>;\n  /** Mount a temporary Cordis Plugin in the current DSH process. This creates an in-memory runtime Plugin, not an installed or configured Plugin. It remains active across later turns until cordis_unmount, toolset unload, or DSH restart. It does not create files, install a package, change cordis.yml or personal/project config, survive restart, or automatically become permanent. To keep it, ask the Agent to implement a normal local, project, or repository Plugin through the regular development workflow. It may affect other sessions in the same process; the sandbox is not a security boundary, and injected services reach the real runtime. `code` runs now as the body of an async JavaScript function in an isolated sandbox and MUST `return` a plugin. Two forms: FUNCTION form `return (ctx) => { … }` — declares no inject, so it can register tools, listen to events, and provide services, but reaching ANY service (e.g. ctx.bash) throws; use it only when you need no services. OBJECT form `return { name?, inject: ['bash', 'llm', …], apply(ctx) { … } }` — declares dependencies, and cordis activates the plugin only after the services exist; PREFER this form. You may reach ONLY the services you list in inject: an undeclared service throws even if it exists, because an undeclared dependency would not be cleaned up if its provider is unmounted. BEFORE calling a service from your code, read cordis_inspect what:\"api\" — it lists method signatures AND the type shapes of their arguments/returns (do not guess a field's type; e.g. a bash run's stdout is an object, not a string). Inside `apply`, use the standard cordis API: `ctx.on(event, listener)` to observe events (see cordis_inspect what:\"events\"), or call `harness.registerTool(ctx, harness.defineTool({ name, description, parameters: { text: { type: 'string', required: true } }, output: { schema: { type: 'string' }, render(_args, value) { return [{ type: 'text', text: value }] } }, async execute(args) { return args.text } }))` to give yourself a new tool — it becomes callable on your NEXT step. Tool parameters: each key IS a property — { type: 'string'|'number'|'integer'|'boolean'|'null'|'object'|'array'|'json', required?: true, description?, enum?, const?, items?, properties? }; every direct DSL object declares additionalProperties: true|false, and oneOf: [schema, schema, ...] replaces type for an exact-one union. A raw JSON-Schema { type: 'object', properties, required?: […] } wrapper is also accepted with open-by-default objects. A tool's `execute` MUST return the lossless JSON value declared by `output.schema`; `output.render(args, value)` separately returns Native/model content blocks. Temporary Plugins can COMPOSE: one Plugin may `ctx.provide('name', value)` a service and another may declare `inject: ['name']` to consume it — the consumer stays pending until the provider exists and returns to pending when the provider is unmounted. Everything registered inside `apply` is cleaned up automatically by cordis_unmount. Sandbox globals: `console` (tagged `[cordis:<id>]`, writes through to the harness terminal), `harness.defineTool`, `harness.registerTool`, `btoa`, `atob`, `TextEncoder`, `TextDecoder`. Node APIs are DISABLED — do filesystem/network/timer work through the cordis services, never Node built-ins: `require`, `setTimeout`/`setInterval`, and `fetch` throw redirect errors; `process` and `Buffer` are undefined. Instead use inject: ['fs'] + ctx.fs for files, inject: ['web'] + ctx.web for HTTP, inject: ['bash'] + ctx.bash for processes, and inject: ['timer'] + ctx.setTimeout/ctx.setInterval for timing (fiber effects, auto-cleaned when unmounted) — cordis_inspect what:\"api\" shows what THIS runtime provides. Write PLAIN JavaScript, not TypeScript (no `as`, no type annotations). Cautions: (1) waterfall events (e.g. tools/pre-execute) hand the listener a trailing `next` callback which MUST be called — returning without `next()` VETOES the call; prefer plain notification events unless you intend to intercept. (2) Never await something that only resolves after the current turn (your code runs INSIDE a tool call of that turn — it would deadlock). (3) Your `ctx` is a restricted façade: you can register tools, observe events, provide/consume services, and use timers, but framework internals (ctx.root, ctx.fiber, ctx.extend, ctx.plugin, …) are withheld. It is not a security boundary though — the services you inject (e.g. ctx.bash) reach the real runtime. */\n  cordis_mount: {\n    /** JavaScript body returning a temporary Plugin; evaluated now and saved nowhere. */\n    code: string;\n  } & Record<string, JsonValue>;\n  /** Unmount a current-process temporary Plugin created by cordis_mount. Waits for its tools, listeners, services, timers, and other owned effects to clean up completely. Only dyn-N temporary ids are accepted; this cannot remove Loader, configured, or installed Plugins. */\n  cordis_unmount: {\n    /** The temporary Plugin id returned by cordis_mount (for example \"dyn-1\"); valid only in this process and invalid after unmount or restart. */\n    id: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** 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. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** 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. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** 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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** 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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n    /** Run as a background subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops. */\n  task_kill: {\n    /** Task id returned by the tool that started the background work. */\n    task_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the task. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background tasks (running and finished) with their ids, kinds, and statuses. */\n  task_list: Record<string, JsonValue>;\n  /** 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. */\n  task_output: {\n    /** Task id returned by the tool that started the background work. */\n    task_id: string;\n    /** Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** 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). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** 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. The 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. Script-body hooks: - `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. - `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. - `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`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: 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. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_inspect: string;\n  cordis_mount: {\n    id: string;\n    pluginName: string;\n    state: \"pending\" | \"loading\" | \"active\" | \"failed\" | \"disposed\" | \"unloading\";\n    provides: string[];\n    waitingFor: string[];\n  };\n  cordis_unmount: {\n    id: string;\n    pluginName: string;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    taskId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  task_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    task: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  task_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  task_output: {\n    text: string;\n    task: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","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":"cordis_inspect","description":"Inspect the live Cordis runtime in the current DSH process. Read-only. Sections: `services` (every provided ctx service and the plugin fiber that owns it), `plugins` (all live plugin fibers with their lifecycle states), `tools` (the model-facing tools currently registered, i.e. what you can call), `temporary` (only temporary Plugins created by cordis_mount: id, name, state, provided services, awaited services, and lifetime), `api` (method signatures AND argument/return type shapes for every LIVE service — read this before writing plugin code that calls a service), `events` (every harness event with its dispatch mode and exact signature — pick listener targets here). Temporary Plugins exist only in memory, remain active across later turns, and disappear after cordis_unmount, toolset unload, or DSH restart; they are not restored automatically. The `temporary` section is a subset of `plugins`. Omit `what` to get all six sections. With `what:\"api\"` or `what:\"events\"`, pass an exact `name` to narrow to one service/event and include its original source JSDoc.","parameters":{"type":"object","properties":{"what":{"type":"string","description":"Limit the report to one section. Omit for all sections.","enum":["services","plugins","tools","temporary","api","events"]},"name":{"type":"string","description":"Exact service key or event name whose original JSDoc to include; valid only with what:\"api\" or what:\"events\"."}}}},{"name":"cordis_mount","description":"Mount a temporary Cordis Plugin in the current DSH process. This creates an in-memory runtime Plugin, not an installed or configured Plugin. It remains active across later turns until cordis_unmount, toolset unload, or DSH restart. It does not create files, install a package, change cordis.yml or personal/project config, survive restart, or automatically become permanent. To keep it, ask the Agent to implement a normal local, project, or repository Plugin through the regular development workflow. It may affect other sessions in the same process; the sandbox is not a security boundary, and injected services reach the real runtime. `code` runs now as the body of an async JavaScript function in an isolated sandbox and MUST `return` a plugin. Two forms: FUNCTION form `return (ctx) => { … }` — declares no inject, so it can register tools, listen to events, and provide services, but reaching ANY service (e.g. ctx.bash) throws; use it only when you need no services. OBJECT form `return { name?, inject: ['bash', 'llm', …], apply(ctx) { … } }` — declares dependencies, and cordis activates the plugin only after the services exist; PREFER this form. You may reach ONLY the services you list in inject: an undeclared service throws even if it exists, because an undeclared dependency would not be cleaned up if its provider is unmounted. BEFORE calling a service from your code, read cordis_inspect what:\"api\" — it lists method signatures AND the type shapes of their arguments/returns (do not guess a field's type; e.g. a bash run's stdout is an object, not a string). Inside `apply`, use the standard cordis API: `ctx.on(event, listener)` to observe events (see cordis_inspect what:\"events\"), or call `harness.registerTool(ctx, harness.defineTool({ name, description, parameters: { text: { type: 'string', required: true } }, output: { schema: { type: 'string' }, render(_args, value) { return [{ type: 'text', text: value }] } }, async execute(args) { return args.text } }))` to give yourself a new tool — it becomes callable on your NEXT step. Tool parameters: each key IS a property — { type: 'string'|'number'|'integer'|'boolean'|'null'|'object'|'array'|'json', required?: true, description?, enum?, const?, items?, properties? }; every direct DSL object declares additionalProperties: true|false, and oneOf: [schema, schema, ...] replaces type for an exact-one union. A raw JSON-Schema { type: 'object', properties, required?: […] } wrapper is also accepted with open-by-default objects. A tool's `execute` MUST return the lossless JSON value declared by `output.schema`; `output.render(args, value)` separately returns Native/model content blocks. Temporary Plugins can COMPOSE: one Plugin may `ctx.provide('name', value)` a service and another may declare `inject: ['name']` to consume it — the consumer stays pending until the provider exists and returns to pending when the provider is unmounted. Everything registered inside `apply` is cleaned up automatically by cordis_unmount. Sandbox globals: `console` (tagged `[cordis:<id>]`, writes through to the harness terminal), `harness.defineTool`, `harness.registerTool`, `btoa`, `atob`, `TextEncoder`, `TextDecoder`. Node APIs are DISABLED — do filesystem/network/timer work through the cordis services, never Node built-ins: `require`, `setTimeout`/`setInterval`, and `fetch` throw redirect errors; `process` and `Buffer` are undefined. Instead use inject: ['fs'] + ctx.fs for files, inject: ['web'] + ctx.web for HTTP, inject: ['bash'] + ctx.bash for processes, and inject: ['timer'] + ctx.setTimeout/ctx.setInterval for timing (fiber effects, auto-cleaned when unmounted) — cordis_inspect what:\"api\" shows what THIS runtime provides. Write PLAIN JavaScript, not TypeScript (no `as`, no type annotations). Cautions: (1) waterfall events (e.g. tools/pre-execute) hand the listener a trailing `next` callback which MUST be called — returning without `next()` VETOES the call; prefer plain notification events unless you intend to intercept. (2) Never await something that only resolves after the current turn (your code runs INSIDE a tool call of that turn — it would deadlock). (3) Your `ctx` is a restricted façade: you can register tools, observe events, provide/consume services, and use timers, but framework internals (ctx.root, ctx.fiber, ctx.extend, ctx.plugin, …) are withheld. It is not a security boundary though — the services you inject (e.g. ctx.bash) reach the real runtime.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"JavaScript body returning a temporary Plugin; evaluated now and saved nowhere."}},"required":["code"]}},{"name":"cordis_unmount","description":"Unmount a current-process temporary Plugin created by cordis_mount. Waits for its tools, listeners, services, timers, and other owned effects to clean up completely. Only dyn-N temporary ids are accepted; this cannot remove Loader, configured, or installed Plugins.","parameters":{"type":"object","properties":{"id":{"type":"string","description":"The temporary Plugin id returned by cordis_mount (for example \"dyn-1\"); valid only in this process and invalid after unmount or restart."}},"required":["id"]}},{"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":"run_code","description":"Execute a TypeScript program against the available tools. Write the BODY of an async function (erasable syntax only; top-level `await` and `return` work) and call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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":false,"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":"request/context","seq":7,"time":1785730501403,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -12,9 +12,9 @@
 {"type":"assistant/chunk","seq":10,"time":1783950000009,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}}}}
 {"type":"assistant/chunk","seq":11,"time":1785498583784,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":12,"time":1785730501404,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":13,"time":1785730501404,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ae9af323-a927-47aa-9d9e-ca843430ed65"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}
+{"type":"assistant/message","seq":13,"time":1785730501404,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e65c0ebe-8e3d-44c0-833f-68efcbc0acb5"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}
 {"type":"tool/call","seq":14,"time":1785730501404,"data":{"turn":1,"step":1,"callId":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}}
-{"type":"tool/result","seq":15,"time":1785730501413,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-mount"},"content":[{"type":"tool-result","toolCallId":"advanced-mount","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-marker\"; available until unmounted or DSH restarts)."}],"isError":false}],"role":"user","id":"e4008108-fd0e-46ac-ae2c-5c84a3069dc4"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
+{"type":"tool/result","seq":15,"time":1785730501413,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-mount"},"content":[{"type":"tool-result","toolCallId":"advanced-mount","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-marker\"; available until unmounted or DSH restarts)."}],"isError":false}],"role":"user","id":"abb8ecee-cb03-4a66-9477-38a52458ab05"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
 {"type":"step/end","seq":16,"time":1785730501413,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":17,"time":1785730501423,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":18,"time":1783950000017,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -22,11 +22,11 @@
 {"type":"assistant/chunk","seq":20,"time":1783950000019,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}}}}
 {"type":"assistant/chunk","seq":21,"time":1785498583804,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":22,"time":1785730501424,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":23,"time":1785730501424,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"2ef827db-b89a-4937-a584-e977dd761374"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[18,19,20,21,22],"surfaceOp":"append"}
+{"type":"assistant/message","seq":23,"time":1785730501424,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cdc95327-3ce1-49ea-8a92-b17e450cc455"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[18,19,20,21,22],"surfaceOp":"append"}
 {"type":"tool/call","seq":24,"time":1785730501424,"data":{"turn":1,"step":2,"callId":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}}
 {"type":"tool/code-dispatch-start","seq":25,"time":1785730501473,"data":{"parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_inspect","arguments":{"what":"temporary"}}}
 {"type":"tool/code-dispatch","seq":26,"time":1785730501474,"data":{"parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_inspect","arguments":{"what":"temporary"},"isError":false,"content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}]}}
-{"type":"tool/result","seq":27,"time":1785730501475,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"advanced-code"},"content":[{"type":"tool-result","toolCallId":"advanced-code","content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}],"isError":false}],"role":"user","id":"160eef06-3299-4ece-abee-5383addcdf10"}},"sourceEventSeqs":[24],"surfaceOp":"append"}
+{"type":"tool/result","seq":27,"time":1785730501475,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"advanced-code"},"content":[{"type":"tool-result","toolCallId":"advanced-code","content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}],"isError":false}],"role":"user","id":"d75c7d03-cbbc-4260-ba40-8c210a3b5bbe"}},"sourceEventSeqs":[24],"surfaceOp":"append"}
 {"type":"step/end","seq":28,"time":1785730501475,"data":{"turn":1,"step":2}}
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 {"type":"assistant/chunk","seq":30,"time":1783950000029,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -34,9 +34,9 @@
 {"type":"assistant/chunk","seq":32,"time":1785037378923,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}}}
 {"type":"assistant/chunk","seq":33,"time":1785498583869,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":34,"time":1785730501484,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":35,"time":1785730501484,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ba73471b-4f92-44db-a2df-0a49bcf895a5"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[30,31,32,33,34],"surfaceOp":"append"}
+{"type":"assistant/message","seq":35,"time":1785730501484,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ba4958e9-231c-437f-a2fc-7a13f392d3ba"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[30,31,32,33,34],"surfaceOp":"append"}
 {"type":"tool/call","seq":36,"time":1785730501484,"data":{"turn":1,"step":3,"callId":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}
-{"type":"tool/result","seq":37,"time":1785730501508,"data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"advanced-direct-child"},"content":[{"type":"tool-result","toolCallId":"advanced-direct-child","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"isError":false}],"role":"user","id":"c6f54a29-e2a4-46f6-bbb2-7c5863569816"}},"sourceEventSeqs":[36],"surfaceOp":"append"}
+{"type":"tool/result","seq":37,"time":1785730501508,"data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"advanced-direct-child"},"content":[{"type":"tool-result","toolCallId":"advanced-direct-child","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"isError":false}],"role":"user","id":"b9ebb37d-e565-4882-95b0-5343da1d68d8"}},"sourceEventSeqs":[36],"surfaceOp":"append"}
 {"type":"step/end","seq":38,"time":1785730501508,"data":{"turn":1,"step":3}}
 {"type":"step/start","seq":39,"time":1785730501521,"data":{"turn":1,"step":4}}
 {"type":"assistant/chunk","seq":40,"time":1783957884594,"data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -44,9 +44,9 @@
 {"type":"assistant/chunk","seq":42,"time":1785037378946,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}}}
 {"type":"assistant/chunk","seq":43,"time":1785498583919,"data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":44,"time":1785730501522,"data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":45,"time":1785730501522,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"72ee9bab-97d5-48ec-9a20-c3526f06c0e9"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[40,41,42,43,44],"surfaceOp":"append"}
+{"type":"assistant/message","seq":45,"time":1785730501522,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4757f4b9-9bde-488b-a54a-1bdea55dd15f"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[40,41,42,43,44],"surfaceOp":"append"}
 {"type":"tool/call","seq":46,"time":1785730501522,"data":{"turn":1,"step":4,"callId":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}
-{"type":"tool/result","seq":47,"time":1785730501647,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"advanced-workflow"},"content":[{"type":"tool-result","toolCallId":"advanced-workflow","content":[{"type":"text","text":"workflow \"advanced-headless-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"c279c877-08f7-4d2a-b681-f28017c897fb"}},"sourceEventSeqs":[46],"surfaceOp":"append"}
+{"type":"tool/result","seq":47,"time":1785730501647,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"advanced-workflow"},"content":[{"type":"tool-result","toolCallId":"advanced-workflow","content":[{"type":"text","text":"workflow \"advanced-headless-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"35baa460-54ff-4fa1-ba9d-66b6661f84e9"}},"sourceEventSeqs":[46],"surfaceOp":"append"}
 {"type":"step/end","seq":48,"time":1785730501648,"data":{"turn":1,"step":4}}
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 {"type":"assistant/chunk","seq":50,"time":1783957884719,"data":{"turn":1,"step":5,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
@@ -54,9 +54,9 @@
 {"type":"assistant/chunk","seq":52,"time":1785037379534,"data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}}}}
 {"type":"assistant/chunk","seq":53,"time":1785498584085,"data":{"turn":1,"step":5,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":54,"time":1785730501661,"data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":55,"time":1785730501661,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"28d6de30-4a8e-4c54-a36e-e9e2739f3006"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[50,51,52,53,54],"surfaceOp":"append"}
+{"type":"assistant/message","seq":55,"time":1785730501661,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"739166e2-ed48-4df2-a9a5-207f34058030"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[50,51,52,53,54],"surfaceOp":"append"}
 {"type":"tool/call","seq":56,"time":1785730501661,"data":{"turn":1,"step":5,"callId":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}}
-{"type":"tool/result","seq":57,"time":1785730501668,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"advanced-unmount"},"content":[{"type":"tool-result","toolCallId":"advanced-unmount","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false}],"role":"user","id":"055c6a1b-f1ea-4a4b-9d7a-62f9b876241d"}},"sourceEventSeqs":[56],"surfaceOp":"append"}
+{"type":"tool/result","seq":57,"time":1785730501668,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"advanced-unmount"},"content":[{"type":"tool-result","toolCallId":"advanced-unmount","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false}],"role":"user","id":"98b05c06-cb77-41a9-8310-324bc72fc7a0"}},"sourceEventSeqs":[56],"surfaceOp":"append"}
 {"type":"step/end","seq":58,"time":1785730501668,"data":{"turn":1,"step":5}}
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 {"type":"assistant/chunk","seq":60,"time":1783957884720,"data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
@@ -64,6 +64,6 @@
 {"type":"assistant/chunk","seq":62,"time":1785037379541,"data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ADVANCED_HEADLESS_OK"}}}}
 {"type":"assistant/chunk","seq":63,"time":1785498584102,"data":{"turn":1,"step":6,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":64,"time":1785730501679,"data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":65,"time":1785730501679,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"ADVANCED_HEADLESS_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"fbcecfc8-fd44-4c61-9c4f-2f42363feefc"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[60,61,62,63,64],"surfaceOp":"append"}
+{"type":"assistant/message","seq":65,"time":1785730501679,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"ADVANCED_HEADLESS_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0a4ca8f2-92c1-4dbc-beb8-923b8791c298"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[60,61,62,63,64],"surfaceOp":"append"}
 {"type":"step/end","seq":66,"time":1785730501679,"data":{"turn":1,"step":6}}
 {"type":"turn/end","seq":67,"time":1785730501679,"data":{"turn":1,"step":6,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/stream-json.expected.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/stream-json.expected.jsonl
index 3422ba662d..50703bdae4 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/stream-json.expected.jsonl
@@ -1,6 +1,6 @@
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Run this advanced flow exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}}
diff --git a/examples/headless-agent/tests/snapshots/goal-tools/stream-json.expected.jsonl b/examples/headless-agent/tests/snapshots/goal-tools/stream-json.expected.jsonl
index 571d7f1280..84d9d41520 100644
--- a/examples/headless-agent/tests/snapshots/goal-tools/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/goal-tools/stream-json.expected.jsonl
@@ -1,6 +1,6 @@
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Probe strict-schema fillers against missing-goal revision 1, then create a durable goal to finish the snapshot proof and inspect it."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Probe strict-schema fillers against missing-goal revision 1, then create a durable goal to finish the snapshot proof and inspect it."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Probe strict-schema fillers against miss","messageSeqs":[4],"source":{"kind":"fallback"}}}}
diff --git a/examples/headless-agent/tests/snapshots/missing-credential/stream-json.expected.jsonl b/examples/headless-agent/tests/snapshots/missing-credential/stream-json.expected.jsonl
index 5640b8313e..7c77ab805d 100644
--- a/examples/headless-agent/tests/snapshots/missing-credential/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/missing-credential/stream-json.expected.jsonl
@@ -1,6 +1,6 @@
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"say pong"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"say pong"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"say pong","messageSeqs":[4],"source":{"kind":"fallback"}}}}
diff --git a/examples/headless-agent/tests/snapshots/provider-retry/stream-json.expected.jsonl b/examples/headless-agent/tests/snapshots/provider-retry/stream-json.expected.jsonl
index 6a5bc29a3d..5da4758d34 100644
--- a/examples/headless-agent/tests/snapshots/provider-retry/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/provider-retry/stream-json.expected.jsonl
@@ -1,6 +1,6 @@
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"retry the transient provider failure"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"retry the transient provider failure"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"retry the transient provider failure","messageSeqs":[4],"source":{"kind":"fallback"}}}}
diff --git a/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl b/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
index e39875310d..45f300bd7c 100644
--- a/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498587408,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"6220154c-f110-413d-8043-3c2608f0a84e"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498587408,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498587436,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498587408,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"39f39ecc-5772-4814-8feb-46433c71becd"}]}}
+{"type":"turn/start","seq":1,"time":1785821457966,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821457966,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498587436,"data":{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"6220154c-f110-413d-8043-3c2608f0a84e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730504659,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"d238c38f-1ead-4ed5-9526-e349831b8334"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498587436,"data":{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"39f39ecc-5772-4814-8feb-46433c71becd"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730504659,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"a5ae9c04-0652-436f-9b5a-437a3a6ed235"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730504659,"data":{"title":"Exercise the six PTY tools","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498587438,"data":{"header":{"config":{"provider":"deepseek-official","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":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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 start a background subagent that keeps its conversation: you receive only its subagent id, never its result, and it works on its own. Use this for work whose result you do not need returned by this call; `send_message` sends it more work.","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 subagent that keeps its conversation and return only its subagent id. This call never returns its result; send it more work with send_message."}},"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":false,"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":"request/context","seq":8,"time":1785730504660,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -13,9 +13,9 @@
 {"type":"assistant/chunk","seq":11,"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\"}"}}}}
 {"type":"assistant/chunk","seq":12,"time":1785498587439,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730504661,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730504661,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"899c450f-57c8-4789-9173-7bc94568cf2a"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730504661,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8cad9650-de5a-4075-8aa3-1b35e67efc2d"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
 {"type":"tool/call","seq":15,"time":1785730504662,"data":{"turn":1,"step":1,"callId":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}}
-{"type":"tool/result","seq":16,"time":1785730504671,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"pty-spawn"},"content":[{"type":"tool-result","toolCallId":"pty-spawn","content":[{"type":"text","text":"started terminal session pty-1 (main) [type: shell]\ndsh> "}],"isError":false}],"role":"user","id":"d7d26c8e-adf0-424f-96a5-497b9b292a66"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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@@ -23,9 +23,9 @@
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+{"type":"assistant/message","seq":24,"time":1785730504680,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f5850535-906d-4a78-8518-a733ec91bbd8"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
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+{"type":"tool/result","seq":26,"time":1785730504688,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"pty-send"},"content":[{"type":"tool-result","toolCallId":"pty-send","content":[{"type":"text","text":"K\ndsh> \n[wait: stdin_read]\n[session: running]\n[output truncated]"}],"isError":false}],"role":"user","id":"4f19b0d0-b31d-40b7-84e5-2783131cb363"},"meta":{"viewport":"printf 'PTY_OK\\n'\nPTY_OK\ndsh> ","waitReason":"stdin_read","sessionStatus":{"kind":"running"},"truncated":false}},"sourceEventSeqs":[25],"surfaceOp":"append"}
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@@ -33,9 +33,9 @@
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+{"type":"assistant/message","seq":34,"time":1785730504697,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4e0d8eed-877d-4a5b-bd92-e7c4c8f2cf23"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
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-{"type":"tool/result","seq":36,"time":1785730504704,"data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"pty-read"},"content":[{"type":"tool-result","toolCallId":"pty-read","content":[{"type":"text","text":"dsh> printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[lines: 0-3 of 3]"}],"isError":false}],"role":"user","id":"20005baf-f804-4c07-b3bc-958a0792794d"}},"sourceEventSeqs":[35],"surfaceOp":"append"}
+{"type":"tool/result","seq":36,"time":1785730504704,"data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"pty-read"},"content":[{"type":"tool-result","toolCallId":"pty-read","content":[{"type":"text","text":"dsh> printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[lines: 0-3 of 3]"}],"isError":false}],"role":"user","id":"72be20be-6022-4363-b9bb-1d9f2cce0e20"}},"sourceEventSeqs":[35],"surfaceOp":"append"}
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@@ -43,9 +43,9 @@
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-{"type":"assistant/message","seq":44,"time":1785730504713,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"94137a12-ca1f-48c9-8204-28f5ea3ebdcb"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[39,40,41,42,43],"surfaceOp":"append"}
+{"type":"assistant/message","seq":44,"time":1785730504713,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"87c2857f-5da3-4050-b081-e044e207be88"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[39,40,41,42,43],"surfaceOp":"append"}
 {"type":"tool/call","seq":45,"time":1785730504713,"data":{"turn":1,"step":4,"callId":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}}
-{"type":"tool/result","seq":46,"time":1785730504721,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"pty-signal"},"content":[{"type":"tool-result","toolCallId":"pty-signal","content":[{"type":"text","text":"Error: unknown PTY session pty-missing"}],"isError":true}],"role":"user","id":"02192e7b-4453-453a-9d77-d71eb0d94eb9"}},"sourceEventSeqs":[45],"surfaceOp":"append"}
+{"type":"tool/result","seq":46,"time":1785730504721,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"pty-signal"},"content":[{"type":"tool-result","toolCallId":"pty-signal","content":[{"type":"text","text":"Error: unknown PTY session pty-missing"}],"isError":true}],"role":"user","id":"c6e3ff43-809c-4bd8-ba88-da7294c3385a"}},"sourceEventSeqs":[45],"surfaceOp":"append"}
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@@ -53,9 +53,9 @@
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-{"type":"assistant/message","seq":54,"time":1785730504731,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"497a5cf0-8770-45b2-a70c-ef2d10097e1c"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[49,50,51,52,53],"surfaceOp":"append"}
+{"type":"assistant/message","seq":54,"time":1785730504731,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5b53e0d5-1c68-4988-9fab-d885a9122fe8"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[49,50,51,52,53],"surfaceOp":"append"}
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-{"type":"tool/result","seq":56,"time":1785730504738,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"pty-kill"},"content":[{"type":"tool-result","toolCallId":"pty-kill","content":[{"type":"text","text":"closed terminal session pty-1"}],"isError":false}],"role":"user","id":"eb2c307d-5bc4-4ff5-a12e-8c23a91110c7"}},"sourceEventSeqs":[55],"surfaceOp":"append"}
+{"type":"tool/result","seq":56,"time":1785730504738,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"pty-kill"},"content":[{"type":"tool-result","toolCallId":"pty-kill","content":[{"type":"text","text":"closed terminal session pty-1"}],"isError":false}],"role":"user","id":"20e3fe4d-3d9d-4771-b75d-1f287fc20048"}},"sourceEventSeqs":[55],"surfaceOp":"append"}
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@@ -63,9 +63,9 @@
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+{"type":"assistant/message","seq":64,"time":1785730504747,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-list","name":"terminal_list","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"178fb9bc-859c-484d-8376-096a705de30a"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[59,60,61,62,63],"surfaceOp":"append"}
 {"type":"tool/call","seq":65,"time":1785730504747,"data":{"turn":1,"step":6,"callId":"pty-list","name":"terminal_list","arguments":"{}"}}
-{"type":"tool/result","seq":66,"time":1785730504755,"data":{"turn":1,"step":6,"message":{"source":{"kind":"tool","callId":"pty-list"},"content":[{"type":"tool-result","toolCallId":"pty-list","content":[{"type":"text","text":"(no terminal sessions)"}],"isError":false}],"role":"user","id":"a4db8f0a-2958-447d-9e43-6e01a8dcb600"}},"sourceEventSeqs":[65],"surfaceOp":"append"}
+{"type":"tool/result","seq":66,"time":1785730504755,"data":{"turn":1,"step":6,"message":{"source":{"kind":"tool","callId":"pty-list"},"content":[{"type":"tool-result","toolCallId":"pty-list","content":[{"type":"text","text":"(no terminal sessions)"}],"isError":false}],"role":"user","id":"584673b3-9221-4a42-b9e4-69ce1b9f4d60"}},"sourceEventSeqs":[65],"surfaceOp":"append"}
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@@ -73,6 +73,6 @@
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-{"type":"assistant/message","seq":74,"time":1785730504764,"data":{"turn":1,"step":7,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"fda4fbd6-0195-4e95-aead-ac2d711ca846"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[69,70,71,72,73],"surfaceOp":"append"}
+{"type":"assistant/message","seq":74,"time":1785730504764,"data":{"turn":1,"step":7,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"23d457ba-b690-4bb9-b434-86f43c9f4da5"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[69,70,71,72,73],"surfaceOp":"append"}
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diff --git a/examples/headless-agent/tests/snapshots/pty-tools/stream-json.expected.jsonl b/examples/headless-agent/tests/snapshots/pty-tools/stream-json.expected.jsonl
index c0cf2d1c35..661f6aaddc 100644
--- a/examples/headless-agent/tests/snapshots/pty-tools/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/pty-tools/stream-json.expected.jsonl
@@ -1,6 +1,6 @@
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"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"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
diff --git a/examples/headless-agent/tests/snapshots/ralph-loop/stream-json.expected.jsonl b/examples/headless-agent/tests/snapshots/ralph-loop/stream-json.expected.jsonl
index aeeed37a31..da79f0ea90 100644
--- a/examples/headless-agent/tests/snapshots/ralph-loop/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/ralph-loop/stream-json.expected.jsonl
@@ -1,6 +1,6 @@
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run a two-round fresh-agent Ralph loop to prove the shipped headless integration."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Run a two-round fresh-agent Ralph loop to prove the shipped headless integration."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Run a two-round fresh-agent Ralph","messageSeqs":[4],"source":{"kind":"fallback"}}}}
diff --git a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
index 85d62074c1..f028014560 100644
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
@@ -1,9 +1,9 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{sessionId}}","origin":"subagent","delegationDepth":1}
 {"type":"sandbox/mode","seq":0,"time":0,"data":{"mode":"read-only","source":"delegation"}}
 {"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":3,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Delegated write probe"}}
-{"type":"turn/start","seq":4,"time":0,"data":{"turn":1}}
+{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":3,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":4,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Delegated write probe"}}
 {"type":"step/start","seq":5,"time":0,"data":{"turn":1,"step":1}}
 {"type":"user/message","seq":6,"time":0,"data":{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"user/message","seq":7,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
diff --git a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
index abb49d7b54..704eb36bae 100644
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
@@ -5,8 +5,8 @@
 {"type":"turn/end","seq":3,"time":0,"data":{"turn":1,"step":0,"reason":{"kind":"completed"}}}
 {"type":"session/end-seed","seq":4,"time":0,"data":{}}
 {"type":"agent/inbox/spliced","seq":5,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"agent/inbox/spliced","seq":6,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":7,"time":0,"data":{"turn":2}}
+{"type":"turn/start","seq":6,"time":0,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":7,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":8,"time":0,"data":{"turn":2,"step":1}}
 {"type":"user/message","seq":9,"time":0,"data":{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"user/message","seq":10,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
diff --git a/examples/jsonrpc-agent/tests/snapshots/bash-tool/notifications.expected.jsonl b/examples/jsonrpc-agent/tests/snapshots/bash-tool/notifications.expected.jsonl
index 2f4f65b1c8..066c790e90 100644
--- a/examples/jsonrpc-agent/tests/snapshots/bash-tool/notifications.expected.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/bash-tool/notifications.expected.jsonl
@@ -1,7 +1,7 @@
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}}
 {"method":"session.status","params":{"sessionId":"{{sessionId}}","status":"running"}}
-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Run this exact command with","messageSeqs":[4],"source":{"kind":"fallback"}}}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl
index d60dd34363..f8638e2257 100644
--- a/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl
@@ -1,9 +1,9 @@
 {"type":"session","version":0,"id":"sdk-snapshot-bash","createdAt":1785097395899,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498589606,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"af86e923-7bb3-4e50-ac13-c753cdf3ebd9"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498589607,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498589630,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498589606,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"8ef0b6e2-40ab-430b-b4df-6514323c7270"}]}}
+{"type":"turn/start","seq":1,"time":1785821460035,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821460035,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785097395908,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498589630,"data":{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"af86e923-7bb3-4e50-ac13-c753cdf3ebd9"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498589630,"data":{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"8ef0b6e2-40ab-430b-b4df-6514323c7270"},"surfaceOp":"append"}
 {"type":"session/title","seq":5,"time":1785498589630,"data":{"title":"Run this exact command with","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":6,"time":1785498589632,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":7,"time":1785730506490,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -15,9 +15,9 @@
 {"type":"assistant/chunk","seq":59,"time":1785097397114,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","arguments":"{\"command\": \"echo dsh-sdk-proof-7391\", \"description\": \"Run the echo command as requested\"}"}}}}
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 {"type":"assistant/chunk","seq":61,"time":1785730506499,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":62,"time":1785730506500,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific bash command and reply with its stdout only."},{"type":"tool-call","id":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","arguments":"{\"command\": \"echo dsh-sdk-proof-7391\", \"description\": \"Run the echo command as requested\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6919c3ef-a4a1-4402-80c8-d5689320d94c"},"usage":{"inputTokens":123,"outputTokens":89,"cacheReadTokens":1664,"reasoningTokens":17}},"sourceEventSeqs":[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":"assistant/message","seq":62,"time":1785730506500,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific bash command and reply with its stdout only."},{"type":"tool-call","id":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","arguments":"{\"command\": \"echo dsh-sdk-proof-7391\", \"description\": \"Run the echo command as requested\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f899e1ce-0802-4305-b2ff-295c858ba09c"},"usage":{"inputTokens":123,"outputTokens":89,"cacheReadTokens":1664,"reasoningTokens":17}},"sourceEventSeqs":[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":1785730506500,"data":{"turn":1,"step":1,"callId":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","arguments":"{\"command\": \"echo dsh-sdk-proof-7391\", \"description\": \"Run the echo command as requested\"}"}}
-{"type":"tool/result","seq":64,"time":1785730506517,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Ry17evSfTr0uJnHhg3X93070"},"content":[{"type":"tool-result","toolCallId":"call_00_Ry17evSfTr0uJnHhg3X93070","content":[{"type":"text","text":"dsh-sdk-proof-7391\n"}],"isError":false}],"role":"user","id":"e92bbb28-f969-41a7-a8dd-bf4276a13a5e"}},"sourceEventSeqs":[63],"surfaceOp":"append"}
+{"type":"tool/result","seq":64,"time":1785730506517,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_Ry17evSfTr0uJnHhg3X93070"},"content":[{"type":"tool-result","toolCallId":"call_00_Ry17evSfTr0uJnHhg3X93070","content":[{"type":"text","text":"dsh-sdk-proof-7391\n"}],"isError":false}],"role":"user","id":"9de11dc6-2548-440a-bed2-a89f9779d2da"}},"sourceEventSeqs":[63],"surfaceOp":"append"}
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 {"type":"assistant/chunk","seq":67,"time":1785097398255,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -28,6 +28,6 @@
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 {"type":"assistant/chunk","seq":95,"time":1785730506530,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":96,"time":1785730506530,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command produced the expected output. I'll reply with just that stdout."},{"type":"text","text":"dsh-sdk-proof-7391"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d4927cda-f732-4c38-b678-6b8409b80337"},"usage":{"inputTokens":233,"outputTokens":24,"cacheReadTokens":1664,"reasoningTokens":15}},"sourceEventSeqs":[67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95],"surfaceOp":"append"}
+{"type":"assistant/message","seq":96,"time":1785730506530,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command produced the expected output. I'll reply with just that stdout."},{"type":"text","text":"dsh-sdk-proof-7391"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"54a3c713-55c2-4e95-9437-e7e3680b18ae"},"usage":{"inputTokens":233,"outputTokens":24,"cacheReadTokens":1664,"reasoningTokens":15}},"sourceEventSeqs":[67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95],"surfaceOp":"append"}
 {"type":"step/end","seq":97,"time":1785730506531,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":98,"time":1785730506531,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/persistent-tools/notifications.expected.jsonl b/examples/jsonrpc-agent/tests/snapshots/persistent-tools/notifications.expected.jsonl
index 09fd7b520a..ec3fb3ff39 100644
--- a/examples/jsonrpc-agent/tests/snapshots/persistent-tools/notifications.expected.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/persistent-tools/notifications.expected.jsonl
@@ -1,7 +1,7 @@
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}}
 {"method":"session.status","params":{"sessionId":"{{sessionId}}","status":"running"}}
-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl
index 3bb5e9f71a..7aefbffee2 100644
--- a/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"persistent-tools-snapshot","createdAt":1785331618309,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498592367,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"875e810d-eb30-48f9-af78-8e1cc41a1597"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498592368,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498592368,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498592367,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"9a08e199-69d7-4b85-bfa4-27b41a92672a"}]}}
+{"type":"turn/start","seq":1,"time":1785821461907,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821461907,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785331618312,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498592368,"data":{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"875e810d-eb30-48f9-af78-8e1cc41a1597"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730508088,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"e93aea81-c689-41f9-85b1-7726bcbcabc6"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498592368,"data":{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"9a08e199-69d7-4b85-bfa4-27b41a92672a"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730508088,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"bb38bdc2-276e-46ec-87a1-089732acbc8d"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730508088,"data":{"title":"Prove that bash state persists.","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498592370,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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@@ -13,9 +13,9 @@
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 {"type":"assistant/chunk","seq":12,"time":1785498592372,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
 {"type":"assistant/chunk","seq":13,"time":1785730508090,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730508090,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"bash-1","name":"bash","arguments":"{\"command\":\"cd /tmp && export DSH_EXAMPLE_COUNT=1 && printf \\\"COUNT=%s CWD=%s\\\\n\\\" \\\"$DSH_EXAMPLE_COUNT\\\" \\\"$PWD\\\"\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c39975a2-6722-4f75-aa93-1cb40e92c494"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"assistant/message","seq":14,"time":1785730508090,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"bash-1","name":"bash","arguments":"{\"command\":\"cd /tmp && export DSH_EXAMPLE_COUNT=1 && printf \\\"COUNT=%s CWD=%s\\\\n\\\" \\\"$DSH_EXAMPLE_COUNT\\\" \\\"$PWD\\\"\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0d064526-8eff-482d-8525-ac478e1d1791"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
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@@ -23,9 +23,9 @@
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@@ -33,9 +33,9 @@
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@@ -43,9 +43,9 @@
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@@ -53,9 +53,9 @@
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@@ -63,9 +63,9 @@
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@@ -73,6 +73,6 @@
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diff --git a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/notifications.expected.jsonl b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/notifications.expected.jsonl
index 93b50e3642..ec8596af58 100644
--- a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/notifications.expected.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/notifications.expected.jsonl
@@ -1,7 +1,7 @@
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool exactly once with description 'echo probe' and prompt: Reply with exactly: child answer 42. Then reply with the subagent's final answer verbatim."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}}
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-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
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 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Use the subagent tool exactly once with description 'echo probe' and prompt: Reply with exactly: child answer 42. Then reply with the subagent's final answer verbatim."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}}
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@@ -101,9 +101,9 @@
 {"method":"subagent.started","params":{"parentSessionId":"{{sessionId}}","childSessionId":"{{sessionId}}"}}
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-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":3,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"subagent/descriptor","seq":3,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"echo probe"}}}}
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diff --git a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.1.jsonl b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.1.jsonl
index dc1f766ac9..9700063d5e 100644
--- a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.1.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.1.jsonl
@@ -1,10 +1,10 @@
 {"type":"session","version":0,"id":"0b7fd85c-9f6f-4d46-b954-363984ce66fb","createdAt":1785097410282,"cwd":"{{cwd}}","parentSession":"sdk-snapshot-subagent","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498591161,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: child answer 42."}],"source":{"kind":"user"},"role":"user","id":"565232fa-b115-48e0-98ac-6ea68b8b5132"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498591161,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":2,"time":1785730507335,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"echo probe"}}
-{"type":"turn/start","seq":3,"time":1785730507335,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498591161,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: child answer 42."}],"source":{"kind":"user"},"role":"user","id":"7ae1698c-db1d-4fca-8404-3a9dece9c1d0"}]}}
+{"type":"turn/start","seq":1,"time":1785821460991,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821460991,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":3,"time":1785821461003,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"echo probe"}}
 {"type":"step/start","seq":4,"time":1785730507335,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730507335,"data":{"content":[{"type":"text","text":"Reply with exactly: child answer 42."}],"source":{"kind":"user"},"role":"user","id":"565232fa-b115-48e0-98ac-6ea68b8b5132"},"surfaceOp":"append"}
+{"type":"user/message","seq":5,"time":1785730507335,"data":{"content":[{"type":"text","text":"Reply with exactly: child answer 42."}],"source":{"kind":"user"},"role":"user","id":"7ae1698c-db1d-4fca-8404-3a9dece9c1d0"},"surfaceOp":"append"}
 {"type":"session/title","seq":6,"time":1785730507335,"data":{"title":"Reply with exactly: child answer","messageSeqs":[5],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":7,"time":1785498591175,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":8,"time":1785730507336,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -16,6 +16,6 @@
 {"type":"assistant/chunk","seq":31,"time":1785097411138,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"child answer 42."}}}}
 {"type":"assistant/chunk","seq":32,"time":1785498591184,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":107,"outputTokens":20,"cacheReadTokens":1664,"reasoningTokens":14}}}}
 {"type":"assistant/chunk","seq":33,"time":1785730507343,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":34,"time":1785730507344,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"child answer 42.\""},{"type":"text","text":"child answer 42."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6710701e-4bc5-4ad1-ab14-0293ce6b6245"},"usage":{"inputTokens":107,"outputTokens":20,"cacheReadTokens":1664,"reasoningTokens":14}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":34,"time":1785730507344,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"child answer 42.\""},{"type":"text","text":"child answer 42."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3d9970cd-d000-4fd5-8712-a88c301ddb19"},"usage":{"inputTokens":107,"outputTokens":20,"cacheReadTokens":1664,"reasoningTokens":14}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":35,"time":1785730507344,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":36,"time":1785730507344,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.jsonl
index a3ec3b3ee1..81f212abee 100644
--- a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn/session.jsonl
@@ -1,9 +1,9 @@
 {"type":"session","version":0,"id":"sdk-snapshot-subagent","createdAt":1785097408901,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498591109,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool exactly once with description 'echo probe' and prompt: Reply with exactly: child answer 42. Then reply with the subagent's final answer verbatim."}],"source":{"kind":"user"},"role":"user","id":"fcebb640-f70c-4cc9-b3c0-ad4e1b953fb2"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498591110,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498591135,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498591109,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool exactly once with description 'echo probe' and prompt: Reply with exactly: child answer 42. Then reply with the subagent's final answer verbatim."}],"source":{"kind":"user"},"role":"user","id":"ce62572c-2af9-4162-aca6-82ae0c89bc48"}]}}
+{"type":"turn/start","seq":1,"time":1785821460945,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821460945,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785097408908,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498591135,"data":{"content":[{"type":"text","text":"Use the subagent tool exactly once with description 'echo probe' and prompt: Reply with exactly: child answer 42. Then reply with the subagent's final answer verbatim."}],"source":{"kind":"user"},"role":"user","id":"fcebb640-f70c-4cc9-b3c0-ad4e1b953fb2"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498591135,"data":{"content":[{"type":"text","text":"Use the subagent tool exactly once with description 'echo probe' and prompt: Reply with exactly: child answer 42. Then reply with the subagent's final answer verbatim."}],"source":{"kind":"user"},"role":"user","id":"ce62572c-2af9-4162-aca6-82ae0c89bc48"},"surfaceOp":"append"}
 {"type":"session/title","seq":5,"time":1785498591135,"data":{"title":"Use the subagent tool exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":6,"time":1785498591137,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":7,"time":1785730507304,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -15,9 +15,9 @@
 {"type":"assistant/chunk","seq":94,"time":1785097410272,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_oHPNQ1nLoakoaAGXIxCM7404","name":"subagent","arguments":"{\"description\": \"echo probe\", \"prompt\": \"Reply with exactly: child answer 42.\"}"}}}}
 {"type":"assistant/chunk","seq":95,"time":1785498591150,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":135,"outputTokens":124,"cacheReadTokens":1664,"reasoningTokens":55}}}}
 {"type":"assistant/chunk","seq":96,"time":1785730507314,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":97,"time":1785730507314,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to:\n1. Use the subagent tool exactly once with description 'echo probe' and prompt 'Reply with exactly: child answer 42.'\n2. Then reply with the subagent's final answer verbatim.\n\nLet me do this step by step."},{"type":"tool-call","id":"call_00_oHPNQ1nLoakoaAGXIxCM7404","name":"subagent","arguments":"{\"description\": \"echo probe\", \"prompt\": \"Reply with exactly: child answer 42.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"30cafeb0-d99b-477e-bae9-56f82749c19b"},"usage":{"inputTokens":135,"outputTokens":124,"cacheReadTokens":1664,"reasoningTokens":55}},"sourceEventSeqs":[8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96],"surfaceOp":"append"}
+{"type":"assistant/message","seq":97,"time":1785730507314,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to:\n1. Use the subagent tool exactly once with description 'echo probe' and prompt 'Reply with exactly: child answer 42.'\n2. Then reply with the subagent's final answer verbatim.\n\nLet me do this step by step."},{"type":"tool-call","id":"call_00_oHPNQ1nLoakoaAGXIxCM7404","name":"subagent","arguments":"{\"description\": \"echo probe\", \"prompt\": \"Reply with exactly: child answer 42.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"07d04a49-4aef-4ccc-a95d-20b38c37ea06"},"usage":{"inputTokens":135,"outputTokens":124,"cacheReadTokens":1664,"reasoningTokens":55}},"sourceEventSeqs":[8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96],"surfaceOp":"append"}
 {"type":"tool/call","seq":98,"time":1785730507315,"data":{"turn":1,"step":1,"callId":"call_00_oHPNQ1nLoakoaAGXIxCM7404","name":"subagent","arguments":"{\"description\": \"echo probe\", \"prompt\": \"Reply with exactly: child answer 42.\"}"}}
-{"type":"tool/result","seq":99,"time":1785730507345,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_oHPNQ1nLoakoaAGXIxCM7404"},"content":[{"type":"tool-result","toolCallId":"call_00_oHPNQ1nLoakoaAGXIxCM7404","content":[{"type":"text","text":"child answer 42."}],"isError":false}],"role":"user","id":"49343d8e-3523-4ed7-92f2-f369dd996b92"}},"sourceEventSeqs":[98],"surfaceOp":"append"}
+{"type":"tool/result","seq":99,"time":1785730507345,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_oHPNQ1nLoakoaAGXIxCM7404"},"content":[{"type":"tool-result","toolCallId":"call_00_oHPNQ1nLoakoaAGXIxCM7404","content":[{"type":"text","text":"child answer 42."}],"isError":false}],"role":"user","id":"5757a7d9-68ed-4190-a29b-586ab0afdd5f"}},"sourceEventSeqs":[98],"surfaceOp":"append"}
 {"type":"step/end","seq":100,"time":1785730507345,"data":{"turn":1,"step":1}}
 {"type":"step/start","seq":101,"time":1785730507355,"data":{"turn":1,"step":2}}
 {"type":"assistant/chunk","seq":102,"time":1785097411813,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
@@ -28,6 +28,6 @@
 {"type":"assistant/chunk","seq":136,"time":1785097412025,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"child answer 42."}}}}
 {"type":"assistant/chunk","seq":137,"time":1785498591207,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":19,"outputTokens":32,"cacheReadTokens":1920,"reasoningTokens":26}}}}
 {"type":"assistant/chunk","seq":138,"time":1785730507362,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":139,"time":1785730507362,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The subagent replied with \"child answer 42.\" Now I need to reply with the subagent's final answer verbatim."},{"type":"text","text":"child answer 42."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3f089c53-1ac4-4c52-b1e5-cf9489961d7c"},"usage":{"inputTokens":19,"outputTokens":32,"cacheReadTokens":1920,"reasoningTokens":26}},"sourceEventSeqs":[102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138],"surfaceOp":"append"}
+{"type":"assistant/message","seq":139,"time":1785730507362,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The subagent replied with \"child answer 42.\" Now I need to reply with the subagent's final answer verbatim."},{"type":"text","text":"child answer 42."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7e4e2067-1d5f-4009-a397-acd58c3b3ba3"},"usage":{"inputTokens":19,"outputTokens":32,"cacheReadTokens":1920,"reasoningTokens":26}},"sourceEventSeqs":[102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138],"surfaceOp":"append"}
 {"type":"step/end","seq":140,"time":1785730507362,"data":{"turn":1,"step":2}}
 {"type":"turn/end","seq":141,"time":1785730507362,"data":{"turn":1,"step":2,"reason":{"kind":"completed"}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/text-turn/notifications.expected.jsonl b/examples/jsonrpc-agent/tests/snapshots/text-turn/notifications.expected.jsonl
index b59708f1f6..0a28622597 100644
--- a/examples/jsonrpc-agent/tests/snapshots/text-turn/notifications.expected.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/text-turn/notifications.expected.jsonl
@@ -1,7 +1,7 @@
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}}
 {"method":"session.status","params":{"sessionId":"{{sessionId}}","status":"running"}}
-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
-{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}}
+{"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}}
 {"method":"session.event","params":{"sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Reply with exactly: SDK snapshot","messageSeqs":[4],"source":{"kind":"fallback"}}}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl
index e9fc8fbfd7..012cf36309 100644
--- a/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl
@@ -1,9 +1,9 @@
 {"type":"session","version":0,"id":"sdk-snapshot-text","createdAt":1785097381464,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498588575,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"cf669e99-de60-42e7-baa7-50990b05f5b9"}]}}
-{"type":"agent/inbox/spliced","seq":1,"time":1785498588575,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/start","seq":2,"time":1785498588596,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":0,"time":1785498588575,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"2950333f-90ff-4b11-b8f9-082612c97488"}]}}
+{"type":"turn/start","seq":1,"time":1785821459144,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":2,"time":1785821459144,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
 {"type":"step/start","seq":3,"time":1785097381472,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498588596,"data":{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"cf669e99-de60-42e7-baa7-50990b05f5b9"},"surfaceOp":"append"}
+{"type":"user/message","seq":4,"time":1785498588596,"data":{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"2950333f-90ff-4b11-b8f9-082612c97488"},"surfaceOp":"append"}
 {"type":"session/title","seq":5,"time":1785498588596,"data":{"title":"Reply with exactly: SDK snapshot","messageSeqs":[4],"source":{"kind":"fallback"}}}
 {"type":"request/header","seq":6,"time":1785498588599,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
 {"type":"request/context","seq":7,"time":1785730505700,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
@@ -15,6 +15,6 @@
 {"type":"assistant/chunk","seq":34,"time":1785097382279,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"SDK snapshot OK"}}}}
 {"type":"assistant/chunk","seq":35,"time":1785498588608,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":1769,"outputTokens":24,"cacheReadTokens":0,"reasoningTokens":19}}}}
 {"type":"assistant/chunk","seq":36,"time":1785730505710,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":37,"time":1785730505710,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"SDK snapshot OK\". Let me do that."},{"type":"text","text":"SDK snapshot OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4526da7d-0f10-4a81-a426-1090d6514622"},"usage":{"inputTokens":1769,"outputTokens":24,"cacheReadTokens":0,"reasoningTokens":19}},"sourceEventSeqs":[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],"surfaceOp":"append"}
+{"type":"assistant/message","seq":37,"time":1785730505710,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"SDK snapshot OK\". Let me do that."},{"type":"text","text":"SDK snapshot OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3dd28f2f-9314-41a8-bf15-851be3652c14"},"usage":{"inputTokens":1769,"outputTokens":24,"cacheReadTokens":0,"reasoningTokens":19}},"sourceEventSeqs":[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],"surfaceOp":"append"}
 {"type":"step/end","seq":38,"time":1785730505710,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":39,"time":1785730505710,"data":{"turn":1,"step":1,"reason":{"kind":"completed"}}}
diff --git a/packages/acp/acp/tests/turns.spec.ts b/packages/acp/acp/tests/turns.spec.ts
index b88b877c3a..8cf67b4d19 100644
--- a/packages/acp/acp/tests/turns.spec.ts
+++ b/packages/acp/acp/tests/turns.spec.ts
@@ -252,12 +252,12 @@ describe('ACP prompt lifecycle', () => {
     }))
     const sessionId = await newSession(harness)
     await expect(harness.client.prompt({ sessionId, prompt: [{ type: 'text', text: 'go' }] }))
-      .resolves.toEqual({ stopReason: 'cancelled' })
-    // The rejected prompt opened no turn and streamed nothing.
+      .resolves.toEqual({ stopReason: 'end_turn' })
+    // The rejected prompt closed a blocked turn without streaming anything.
     expect(messageText(harness)).toBe('')
   })
 
-  it('settles a prompt when pre-step fails before opening a turn', async () => {
+  it('rejects a prompt when pre-step fails inside its open turn', async () => {
     harness = await makeBridgeHarness({ script: [] })
     harness.ctx.on('agent/pre-step', async () => { throw new Error('pre-step exploded') })
     const sessionId = await newSession(harness)
diff --git a/packages/cordis/tool-cordis/src/api-catalog.ts b/packages/cordis/tool-cordis/src/api-catalog.ts
index 6dc75f8d53..10cdf09e9a 100644
--- a/packages/cordis/tool-cordis/src/api-catalog.ts
+++ b/packages/cordis/tool-cordis/src/api-catalog.ts
@@ -1244,8 +1244,8 @@ export const EVENT_API: readonly EventApiEntry[] = [
     name: 'agent/inbox/claimed',
     mode: 'emit',
     signature: '\'agent/inbox/claimed\'(this: Scoped<Agent>, agent: Agent, event: { message: UserMessage; turn: number }): void',
-    jsDoc: '/**\n * One message left the inbox for a turn. If the turn boundary that\n * claimed it is rejected, the claimed message ends here: it is neither\n * discarded nor re-emitted as a user/message, and a later batch may\n * reuse the same turn number.\n * @param agent - the agent whose inbox changed.\n * @param event - the claimed message and owning turn.\n * Scope-filtered dispatch (`@deepseek-ai/dsh-scope`): agent-scoped listeners receive only that agent.\n * @mode emit\n */',
-    summary: 'One message left the inbox for a turn.',
+    jsDoc: '/**\n * One message left the inbox inside its open turn. If the proposed step\n * is rejected, the claimed message ends here: it is neither discarded nor\n * re-emitted as a user/message, and the turn closes without a step.\n * @param agent - the agent whose inbox changed.\n * @param event - the claimed message and owning turn.\n * Scope-filtered dispatch (`@deepseek-ai/dsh-scope`): agent-scoped listeners receive only that agent.\n * @mode emit\n */',
+    summary: 'One message left the inbox inside its open turn.',
   },
   {
     name: 'agent/inbox/discarded',
diff --git a/packages/core/agent-loop/README.i18n.yaml b/packages/core/agent-loop/README.i18n.yaml
index fd94f8a980..b367202a3c 100644
--- a/packages/core/agent-loop/README.i18n.yaml
+++ b/packages/core/agent-loop/README.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 packages/core/agent-loop/README.md
-README.md: 2029b9424975618beccf35c42e42d0bacb6743c0
-README.zh.md: e83739635539ce5ba6f070113c164d914ca4167f
+README.md: ec1948506bbaf7a3416c2031fb472a9b513b500f
+README.zh.md: 559cfab2d43d94d01567326e9292cbf4431eda02
diff --git a/packages/core/agent-loop/README.md b/packages/core/agent-loop/README.md
index 2029b94249..ec1948506b 100644
--- a/packages/core/agent-loop/README.md
+++ b/packages/core/agent-loop/README.md
@@ -55,7 +55,7 @@ Configured agents start automatically. A model call requires both `provider` and
 
 The concrete `ReactLoopAgent`, its inbox, and run controls are package-internal. The package root exports only the plugin/service/config contract, and the package exports map exposes no `./src/*` escape hatch; lifecycle owners create agents through `ctx.agents` rather than naming, constructing, or starting driver internals. One prepared session can be claimed by only one concrete driver, and everything observable happens through session events and the `agent/*` event taxonomy.
 
-The unified `send()` primitive routes content and source by (`target` × `wakeup`); `followup`/`steer`/`inject` are its fixed-preset aliases. `followup()` appends to the `next-turn` FIFO and wakes the driver, `steer()` appends to the `next-step` inbox and wakes it, and `inject()` appends to that same `next-step` inbox without waking it. At a turn boundary the driver atomically claims pending next-step input plus one queued prompt; between steps it claims only next-step input. Claiming removes the batch through pure deletion splices and emits `agent/inbox/claimed { message, turn }` once per message. `agent/pre-step` then returns either rejection or the complete messages entering the proposed step. Rejection leaves the claimed batch removed; input inserted after the claim remains pending, and idle injection waits until follow-up or steering wakes the driver.
+The unified `send()` primitive routes content and source by (`target` × `wakeup`); `followup`/`steer`/`inject` are its fixed-preset aliases. `followup()` appends to the `next-turn` FIFO and wakes the driver, `steer()` appends to the `next-step` inbox and wakes it, and `inject()` appends to that same `next-step` inbox without waking it. At a turn boundary the driver opens the durable turn, then atomically claims pending next-step input plus one queued prompt; between steps it claims only next-step input. Claiming removes the batch through pure deletion splices and emits `agent/inbox/claimed { message, turn }` once per message. `agent/pre-step` then returns either rejection or the complete messages entering the proposed step. Rejection leaves the claimed batch removed and closes the turn without a step; input inserted after the claim remains pending, and idle injection waits until follow-up or steering wakes the driver.
 
 Every inbox mutation publishes one normalized `agent/inbox/spliced` event before changing the live projection. Insertions, edits, removals, claiming, and cancellation replay through the same standard splice coordinates. Ordinary removals carry `outcome: 'canceled'` and emit `agent/inbox/discarded { message }`; claiming uses pure deletions with no outcome, after which the loop emits `agent/inbox/claimed`. Every insertion emits `agent/inbox/inserted { message }`. `MessageId` stays unique across both pending lists, and synchronous durable-event observers can reconstruct removed values from the pre-splice projection.
 
diff --git a/packages/core/agent-loop/README.zh.md b/packages/core/agent-loop/README.zh.md
index e837396355..559cfab2d4 100644
--- a/packages/core/agent-loop/README.zh.md
+++ b/packages/core/agent-loop/README.zh.md
@@ -55,7 +55,7 @@ interface Config {
 
 实体 `ReactLoopAgent`、其 inbox 与运行控制均为包内部实现。包根只导出插件／服务／配置契约，包导出映射不提供 `./src/*` 逃逸路径；生命周期拥有方通过 `ctx.agents` 创建 agent，而不是点名、构造或启动驱动器内部组件。一个准备完成的会话只能由一个实体驱动器认领；所有可观测行为都通过会话事件和 `agent/*` 事件分类体系发生。
 
-统一的 `send()` 原语按（`target` × `wakeup`）路由内容与来源；`followup`/`steer`/`inject` 是它的固定预设别名。`followup()` 追加到 `next-turn` FIFO 并唤醒驱动器，`steer()` 追加到 `next-step` inbox 并唤醒驱动器，`inject()` 则追加到同一个 `next-step` inbox，但不唤醒驱动器。在轮次边界，驱动器会原子领取待处理的 next-step 输入和一条排队提示词；在步骤之间则只领取 next-step 输入。领取通过纯删除 splice 移除批次，并针对每条消息发出 `agent/inbox/claimed { message, turn }`。随后 `agent/pre-step` 返回 reject，或返回拟进入步骤的完整消息。reject 后已领取批次保持已删除；领取后插入的输入仍等待后续处理，而空闲注入会一直等待，直到 follow-up 或 steering 唤醒驱动器。
+统一的 `send()` 原语按（`target` × `wakeup`）路由内容与来源；`followup`/`steer`/`inject` 是它的固定预设别名。`followup()` 追加到 `next-turn` FIFO 并唤醒驱动器，`steer()` 追加到 `next-step` inbox 并唤醒驱动器，`inject()` 则追加到同一个 `next-step` inbox，但不唤醒驱动器。在轮次边界，驱动器会先打开持久轮次，再原子领取待处理的 next-step 输入和一条排队提示词；在步骤之间则只领取 next-step 输入。领取通过纯删除 splice 移除批次，并针对每条消息发出 `agent/inbox/claimed { message, turn }`。随后 `agent/pre-step` 返回 reject，或返回拟进入步骤的完整消息。reject 后已领取批次保持已删除，并关闭不含步骤的轮次；领取后插入的输入仍等待后续处理，而空闲注入会一直等待，直到 follow-up 或 steering 唤醒驱动器。
 
 每次 inbox 变更都会先发布一条规范化的 `agent/inbox/spliced` 事件，再修改实时投影。因此，插入、编辑、移除、领取与取消都通过同一组标准 splice 坐标回放。普通删除携带 `outcome: 'canceled'` 并发出 `agent/inbox/discarded { message }`；领取使用不带 outcome 的纯删除，随后由循环发出 `agent/inbox/claimed`。每次插入都会发出 `agent/inbox/inserted { message }`。`MessageId` 在两个待处理列表之间保持唯一，同步持久事件观察方可以从 splice 前投影重建被移除的值。
 
diff --git a/packages/core/agent-loop/src/agent.ts b/packages/core/agent-loop/src/agent.ts
index 2909baeb70..ba18196a0b 100644
--- a/packages/core/agent-loop/src/agent.ts
+++ b/packages/core/agent-loop/src/agent.ts
@@ -219,7 +219,7 @@ export class ReactLoopAgent implements Agent {
     return decision.kind === 'reject' ? decision : { ...decision, assembly }
   }
 
-  /** Claimed input stays unowned until `turn/start` commits. */
+  /** Open one turn before claiming its first proposed step. */
   private async turn(): Promise<boolean> {
     if (this.phase.kind === 'idle' || this.phase.kind === 'maintenance') {
       this.throwError(new Error(`agent "${this.id}": turn without driver reservation`))
@@ -230,30 +230,32 @@ export class ReactLoopAgent implements Agent {
     const phase = { kind: 'running' as const, abort, turn: lastTurn, step: 0 }
     this.setPhase(phase)
     signal.throwIfAborted()
-    let decision: PreparedStep
-    try {
-      decision = await this.preStep('next-turn', { turn: phase.turn + 1, step: 1 })
-      if (decision.kind === 'reject') return false
-      // An empty admitted batch (claimed input removed before the wake, or no
-      // runtime-context change) parks the driver instead of opening a turn and
-      // spending a model call on nothing.
-      if (decision.messages.length === 0) return false
-      signal.throwIfAborted()
-    } catch (error: unknown) {
-      if (signal.aborted) throw error
-      this.throwError(error)
-    }
-    const turn = ++phase.turn
+    const turn = phase.turn + 1
     try {
       this.session.append('turn/start', { turn })
     } catch (error: unknown) {
       this.throwError(error)
     }
+    phase.turn = turn
     let turnEnds: TurnEndReason | null = null
+    let target: InboxTarget = 'next-turn'
     try {
       while (true) {
         signal.throwIfAborted()
         const step = phase.step + 1
+        const decision = await this.preStep(target, { turn, step })
+        if (decision.kind === 'reject') {
+          turnEnds = { kind: 'blocked' }
+          return false
+        }
+        if (turnEnds && decision.messages.length === 0) break
+        // A removed waking message or an enter decision rewritten to empty
+        // still owns the initial turn boundary, but it spends no model call.
+        if (phase.step === 0 && decision.messages.length === 0) {
+          turnEnds = { kind: 'completed' }
+          return false
+        }
+        signal.throwIfAborted()
         this.session.append('step/start', { turn, step })
         phase.step = step
         try {
@@ -275,13 +277,7 @@ export class ReactLoopAgent implements Agent {
           signal.throwIfAborted()
         }
         if (turnEnds && this.inbox.nextStep.length === 0) break
-        decision = await this.preStep('next-step', { turn, step: phase.step + 1 })
-        if (decision.kind === 'reject') {
-          turnEnds = { kind: 'blocked' }
-          return false
-        }
-        signal.throwIfAborted()
-        if (decision.messages.length === 0 && turnEnds) break
+        target = 'next-step'
       }
     } catch (error: unknown) {
       if (signal.aborted) {
diff --git a/packages/core/agent-loop/tests/agent.spec.ts b/packages/core/agent-loop/tests/agent.spec.ts
index 16fc85988c..1692f19291 100644
--- a/packages/core/agent-loop/tests/agent.spec.ts
+++ b/packages/core/agent-loop/tests/agent.spec.ts
@@ -56,11 +56,18 @@ describe('Agent', () => {
     const inserted: unknown[] = []
     const claimed: unknown[] = []
     const discarded: unknown[] = []
+    const lifecycle: string[] = []
+    ctx.on('session/event', (session, event) => {
+      if (session === agent.session && event.type === 'turn/start') lifecycle.push('turn/start')
+    })
     ctx.on('agent/inbox/inserted', (subject, event) => {
       if (subject === agent) inserted.push(event)
     })
     ctx.on('agent/inbox/claimed', (subject, event) => {
-      if (subject === agent) claimed.push(event)
+      if (subject === agent) {
+        lifecycle.push('agent/inbox/claimed')
+        claimed.push(event)
+      }
     })
     ctx.on('agent/inbox/discarded', (subject, event) => {
       if (subject === agent) discarded.push(event)
@@ -78,6 +85,7 @@ describe('Agent', () => {
     expect(inserted).toEqual([{ message: context }, { message: prompt }])
     expect(discarded).toEqual([{ message: context }])
     expect(claimed).toEqual([{ message: prompt, turn: 1 }])
+    expect(lifecycle).toEqual(['turn/start', 'agent/inbox/claimed'])
   })
 
   it('idle inject() rejects invalid input before enqueue', async () => {
diff --git a/packages/core/agent-loop/tests/cancel.spec.ts b/packages/core/agent-loop/tests/cancel.spec.ts
index f7ac1fac4b..7333bd9a9b 100644
--- a/packages/core/agent-loop/tests/cancel.spec.ts
+++ b/packages/core/agent-loop/tests/cancel.spec.ts
@@ -361,33 +361,6 @@ describe('Agent.cancel()', () => {
     expect(reasons.length).toBe(2)
   })
 
-  it('cancel from a synchronous turn/start session-event listener drops the step (step-start window)', async () => {
-    const adapter = new MockAdapter([textResponse('should not stream')])
-    const ctx = await harness(adapter)
-    const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
-
-    // A turn/start listener fires before a step controller exists, so the
-    // turn-scoped marker—not step abort—must drop the pending step.
-    let streamed = false
-    ctx.on('session/event', (_s, event) => { if (event.type === 'assistant/chunk') streamed = true })
-    const dispose = ctx.on('session/event', (session, event) => {
-      if (session === agent.session && event.type === 'turn/start') agent.cancel({ kind: 'user' })
-    })
-
-    const reasons: TurnEndReason[] = []
-    ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
-
-    send(agent, 'go')
-    await waitForIdle(ctx, agent)
-    dispose()
-
-    // No step streamed (the model never ran), and the turn ended aborted with
-    // the caller's cause — the marker carries `cancel(cause)` through even
-    // though no AbortController observed it in this window.
-    expect(streamed).toBe(false)
-    expect(reasons).toEqual([{ kind: 'aborted', reason: { kind: 'user' } }])
-  })
-
   it('cancel from a synchronous step/start session-event listener drops the step (post-step-start window)', async () => {
     const adapter = new MockAdapter([textResponse('should not stream')])
     const ctx = await harness(adapter)
@@ -487,8 +460,8 @@ describe('Agent.cancel()', () => {
     const ctx = await harness(adapter)
     const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
 
-    // `agent/status` is synchronous, so cancellation can land after the first
-    // pre-step check; the second check must drop the now-empty turn.
+    // `agent/status` is synchronous, so cancellation can land before the
+    // durable turn-start commit and must drop the reserved work.
     let streamed = false
     ctx.on('session/event', (_s, event) => { if (event.type === 'assistant/chunk') streamed = true })
     const dispose = ctx.on('agent/status', (subject, status) => {
@@ -735,11 +708,8 @@ describe('Agent.cancel()', () => {
     agent.cancel({ kind: 'user' })
     await idle
     const turnEnd = agent.session.events.findLast(event => event.type === 'turn/end')
-    if (stage === 'pre-step' || stage === 'system-prompt') {
-      expect(turnEnd).toBeUndefined()
-    } else {
-      expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toEqual({ kind: 'aborted', reason: { kind: 'user' } })
-    }
+    expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason)
+      .toEqual({ kind: 'aborted', reason: { kind: 'user' } })
     await ctx.fiber.dispose()
   })
 })
diff --git a/packages/core/agent-loop/tests/contract-regressions.spec.ts b/packages/core/agent-loop/tests/contract-regressions.spec.ts
index 6281529035..0b7e96f08f 100644
--- a/packages/core/agent-loop/tests/contract-regressions.spec.ts
+++ b/packages/core/agent-loop/tests/contract-regressions.spec.ts
@@ -187,7 +187,7 @@ describe('abort during tool execution ends the turn', () => {
       .toBeUndefined()
   })
 
-  it('parks an empty admitted batch instead of opening a turn', async () => {
+  it('closes an empty admitted batch as a turn without a step', async () => {
     const adapter = new MockAdapter([textResponse('must not run')])
     const ctx = await harness(adapter)
     const agent = ctx.agentLoop.create(SessionId('a-empty-batch'), { provider: 'mock', model: 'mock' })
@@ -197,7 +197,11 @@ describe('abort during tool execution ends the turn', () => {
     agent.inbox.remove(agent.inbox.nextTurn[0]!.id)
     await waitForIdle(ctx, agent)
     expect(adapter.requests).toHaveLength(0)
-    expect(agent.session.events.some(event => event.type === 'turn/start')).toBe(false)
+    expect(agent.session.events.filter(event => event.type === 'turn/start'
+      || event.type === 'step/start' || event.type === 'turn/end').map(event => event.type))
+      .toEqual(['turn/start', 'turn/end'])
+    expect(agent.session.events.find(event => event.type === 'turn/end')?.data)
+      .toEqual({ turn: 1, step: 0, reason: { kind: 'completed' } })
     expect(agent.inbox.nextTurn).toHaveLength(0)
   })
 
@@ -747,6 +751,7 @@ describe('turn and step boundary recovery', () => {
 
     expect(agent.session.events.some(event => event.type === 'turn/start'
       || event.type === 'user/message')).toBe(false)
+    expect(agent.inbox.nextTurn).toHaveLength(1)
     expect(errors.map(error => error.message)).toEqual(['reject turn-start before commit'])
     expect(adapter.requests).toHaveLength(0)
   })
@@ -878,7 +883,7 @@ describe('turn and step boundary recovery', () => {
     expect(e.some(x => x.type === 'turn/end' && x.data.reason.kind === 'error')).toBe(false)
   })
 
-  it('contains a pre-step throw after disposal without opening a turn', async () => {
+  it('contains a pre-step throw after disposal inside a balanced no-step turn', async () => {
     const adapter = new MockAdapter([textResponse('never reached')])
     const ctx = await balancedHarness(adapter)
     let agent!: Agent
@@ -902,8 +907,10 @@ describe('turn and step boundary recovery', () => {
     await agent.whenIdle()
 
     const e = [...agent.session.events]
-    expect(e.some(x => x.type === 'turn/start')).toBe(false)
-    expect(e.some(x => x.type === 'turn/end')).toBe(false)
+    expect(e.filter(x => x.type === 'turn/start' || x.type === 'turn/end').map(x => x.type))
+      .toEqual(['turn/start', 'turn/end'])
+    expect(e.find(x => x.type === 'turn/end')?.data.reason)
+      .toEqual({ kind: 'aborted', reason: { kind: 'disposed' } })
     expect(e.some(x => x.type === 'step/start')).toBe(false)
     expect(errorEmits).toHaveLength(0)
   })
@@ -1090,7 +1097,7 @@ describe('tool result call identity', () => {
 })
 
 describe('disposal and cancellation during pre-step assembly', () => {
-  it('disposal during system-prompt assembly prevents the turn from opening', { timeout: 30000 }, async () => {
+  it('disposal during system-prompt assembly closes a no-step turn', { timeout: 30000 }, async () => {
     // Start disposal, then release assembly. Do not await disposal first: it
     // waits for the blocked driver to exit.
     const adapter = new MockAdapter(['hang'])
@@ -1134,14 +1141,15 @@ describe('disposal and cancellation during pre-step assembly', () => {
     unlisten()
 
     const e = [...agent.session.events]
-    expect(e.some(x => x.type === 'turn/start')).toBe(false)
-    expect(e.some(x => x.type === 'turn/end')).toBe(false)
+    expect(e.filter(x => x.type === 'turn/start' || x.type === 'turn/end').map(x => x.type))
+      .toEqual(['turn/start', 'turn/end'])
     expect(e.some(x => x.type === 'step/start')).toBe(false)
     expect(e.some(x => x.type === 'step/end')).toBe(false)
     expect(e.some(x => x.type === 'assistant/chunk')).toBe(false)
+    expect(reasons).toEqual([{ kind: 'aborted', reason: { kind: 'disposed' } }])
   })
 
-  it('cancel during system-prompt assembly prevents the turn from opening', { timeout: 30000 }, async () => {
+  it('cancel during system-prompt assembly closes a no-step turn', { timeout: 30000 }, async () => {
     const adapter = new MockAdapter([textResponse('should not appear')])
     let releaseAssemble!: () => void
     const blocker = new Promise<void>(r => void (releaseAssemble = r))
@@ -1180,17 +1188,17 @@ describe('disposal and cancellation during pre-step assembly', () => {
     unlisten()
 
     const e = [...agent.session.events]
-    expect(e.some(x => x.type === 'turn/start')).toBe(false)
-    expect(e.some(x => x.type === 'turn/end')).toBe(false)
+    expect(e.filter(x => x.type === 'turn/start' || x.type === 'turn/end').map(x => x.type))
+      .toEqual(['turn/start', 'turn/end'])
     expect(e.some(x => x.type === 'step/start')).toBe(false)
     expect(e.some(x => x.type === 'step/end')).toBe(false)
     expect(e.some(x => x.type === 'assistant/chunk')).toBe(false)
     expect(e.some(x => x.type === 'assistant/message')).toBe(false)
     expect(adapter.requests).toHaveLength(0)
-    expect(reasons).toEqual([])
+    expect(reasons).toEqual([{ kind: 'aborted', reason: { kind: 'user' } }])
   })
 
-  it('disposal during pre-step prevents the turn from opening', { timeout: 15000 }, async () => {
+  it('disposal during pre-step closes a no-step turn', { timeout: 15000 }, async () => {
     // Start disposal, then release pre-step; awaiting disposal first would deadlock on the blocked driver.
     const adapter = new MockAdapter(['hang'])
     let releasePreStep!: () => void
@@ -1227,16 +1235,16 @@ describe('disposal and cancellation during pre-step assembly', () => {
     await disposalDone
     await driverDone(agent)
 
-    // The post-listener cancellation check catches disposal before any turn or LLM call.
+    // The post-listener cancellation check catches disposal before any step or LLM call.
     const e = [...agent.session.events]
-    expect(e.some(x => x.type === 'turn/start')).toBe(false)
-    expect(e.some(x => x.type === 'turn/end')).toBe(false)
+    expect(e.filter(x => x.type === 'turn/start' || x.type === 'turn/end').map(x => x.type))
+      .toEqual(['turn/start', 'turn/end'])
     expect(e.some(x => x.type === 'step/start')).toBe(false)
     expect(e.some(x => x.type === 'assistant/chunk')).toBe(false)
-    expect(reasons).toEqual([])
+    expect(reasons).toEqual([{ kind: 'aborted', reason: { kind: 'disposed' } }])
   })
 
-  it('cancel during pre-step prevents the turn from opening', { timeout: 15000 }, async () => {
+  it('cancel during pre-step closes a no-step turn', { timeout: 15000 }, async () => {
     // Release pre-step after cancellation to exercise the post-listener check.
     const adapter = new MockAdapter(['hang'])
     let releasePreStep!: () => void
@@ -1275,11 +1283,11 @@ describe('disposal and cancellation during pre-step assembly', () => {
     await driverDone(agent)
 
     const e = [...agent.session.events]
-    expect(e.some(x => x.type === 'turn/start')).toBe(false)
-    expect(e.some(x => x.type === 'turn/end')).toBe(false)
+    expect(e.filter(x => x.type === 'turn/start' || x.type === 'turn/end').map(x => x.type))
+      .toEqual(['turn/start', 'turn/end'])
     expect(e.some(x => x.type === 'step/start')).toBe(false)
     expect(e.some(x => x.type === 'assistant/chunk')).toBe(false)
-    expect(reasons).toEqual([])
+    expect(reasons).toEqual([{ kind: 'aborted', reason: { kind: 'user' } }])
   })
 
   it('disposal during assembly does not leak an LLM call or append assistant/chunk', { timeout: 15000 }, async () => {
@@ -1319,8 +1327,10 @@ describe('disposal and cancellation during pre-step assembly', () => {
     await driverDone(agent)
 
     const e = [...agent.session.events]
-    expect(e.some(x => x.type === 'turn/start')).toBe(false)
-    expect(e.some(x => x.type === 'turn/end')).toBe(false)
+    expect(e.filter(x => x.type === 'turn/start' || x.type === 'turn/end').map(x => x.type))
+      .toEqual(['turn/start', 'turn/end'])
+    expect(e.find(x => x.type === 'turn/end')?.data.reason)
+      .toEqual({ kind: 'aborted', reason: { kind: 'disposed' } })
     expect(e.some(x => x.type === 'assistant/chunk')).toBe(false)
     expect(e.some(x => x.type === 'assistant/message')).toBe(false)
     expect(adapter.requests).toHaveLength(0)
diff --git a/packages/core/agent-loop/tests/interception.spec.ts b/packages/core/agent-loop/tests/interception.spec.ts
index 552db57432..86a3d664c5 100644
--- a/packages/core/agent-loop/tests/interception.spec.ts
+++ b/packages/core/agent-loop/tests/interception.spec.ts
@@ -231,7 +231,7 @@ describe('agent/pre-step', () => {
     expect(events(agent).filter(event => event.type === 'step/start')).toHaveLength(1)
   })
 
-  it('reject drops the claimed prompt before any turn or model call', async () => {
+  it('reject closes the claimed prompt turn without a step or model call', async () => {
     const adapter = new MockAdapter([textResponse('should not run')])
     const ctx = await harness(adapter)
     const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
@@ -247,11 +247,11 @@ describe('agent/pre-step', () => {
     // the model was never called
     expect(adapter.requests).toHaveLength(0)
     const log = events(agent)
-    expect(log.some(e => e.type === 'turn/start')).toBe(false)
-    expect(log.some(e => e.type === 'turn/end')).toBe(false)
+    expect(log.filter(e => e.type === 'turn/start' || e.type === 'turn/end').map(e => e.type))
+      .toEqual(['turn/start', 'turn/end'])
     expect(log.some(e => e.type === 'user/message')).toBe(false)
     expect(log.some(e => e.type === 'step/start')).toBe(false)
-    expect(reasons).toEqual([])
+    expect(reasons).toEqual([{ kind: 'blocked' }])
   })
 
   it('stages inject and steer during pre-step for the entered turn', async () => {
@@ -274,7 +274,7 @@ describe('agent/pre-step', () => {
     send(agent, 'entered prompt')
     await entered.promise
     expect(agent.status).toBe('running')
-    expect(events(agent).some(event => event.type === 'turn/start')).toBe(false)
+    expect(events(agent).some(event => event.type === 'turn/start')).toBe(true)
 
     agent.inject(createUserMessage({
       content: [{ type: 'text', text: 'attached context' }],
@@ -342,7 +342,8 @@ describe('agent/pre-step', () => {
         { type: 'text', text: 'staged context' },
         { type: 'text', text: 'staged steering' },
       ])
-    expect(events(agent).some(event => event.type === 'turn/start')).toBe(false)
+    expect(events(agent).filter(event => event.type === 'turn/start' || event.type === 'turn/end')
+      .map(event => event.type)).toEqual(['turn/start', 'turn/end'])
     expect(adapter.requests).toEqual([])
 
     disposeBlock()
@@ -398,7 +399,8 @@ describe('agent/pre-step', () => {
     send(agent, 'later prompt')
     await idle
 
-    expect(events(agent).some(event => event.type === 'turn/start')).toBe(false)
+    expect(events(agent).filter(event => event.type === 'turn/start' || event.type === 'turn/end')
+      .map(event => event.type)).toEqual(['turn/start', 'turn/end'])
     expect(agent.inbox.nextStep.map(message => message.content[0]))
       .toEqual([
         { type: 'text', text: 'earlier state change' },
@@ -498,8 +500,9 @@ describe('agent/pre-step', () => {
     const log = events(agent)
     expect(log.filter(e => e.type === 'user/message')).toHaveLength(0)
     expect(adapter.requests).toHaveLength(0)
-    expect(log.filter(e => e.type === 'turn/start')).toHaveLength(0)
-    expect(reasons).toEqual([])
+    expect(log.filter(e => e.type === 'turn/start')).toHaveLength(1)
+    expect(log.filter(e => e.type === 'turn/end')).toHaveLength(1)
+    expect(reasons).toEqual([{ kind: 'blocked' }])
     expect(agent.inbox.nextTurn.map(message => message.content[0]))
       .toEqual([{ type: 'text', text: 'safe' }])
 
@@ -537,9 +540,12 @@ describe('agent/pre-step', () => {
     await idle
     expect(errors).toEqual([expect.objectContaining({ message: 'prompt hook broke' })])
     const log = events(agent)
-    expect(log.filter(e => e.type === 'turn/start')).toHaveLength(0)
-    expect(log.filter(e => e.type === 'turn/end')).toHaveLength(0)
-    expect(reasons).toEqual([])
+    expect(log.filter(e => e.type === 'turn/start')).toHaveLength(1)
+    expect(log.filter(e => e.type === 'turn/end')).toHaveLength(1)
+    expect(reasons).toEqual([{
+      kind: 'error',
+      error: { message: 'prompt hook broke', code: 'UNKNOWN' },
+    }])
     expect(statuses).toEqual(['running', 'idle'])
     expect(adapter.requests).toHaveLength(0)
     expect(agent.inbox.nextTurn.map(message => message.content[0]))
@@ -775,7 +781,7 @@ describe('worked example: a native hook plugin is just a cordis plugin on the se
     expect(log.some(e => e.type.startsWith('hook/'))).toBe(false)
   })
 
-  it('the same plugin blocks a destructive prompt before a turn or model call', async () => {
+  it('the same plugin blocks a destructive prompt inside a no-step turn', async () => {
     const adapter = new MockAdapter([textResponse('should not run')])
     const ctx = await harness(adapter)
     await ctx.plugin(NativeGuard)
@@ -788,7 +794,7 @@ describe('worked example: a native hook plugin is just a cordis plugin on the se
     await agent.whenIdle()
 
     expect(adapter.requests).toHaveLength(0)
-    expect(reasons).toEqual([])
+    expect(reasons).toEqual([{ kind: 'blocked' }])
   })
 
   it('HMR-safety: disposing the plugin fiber removes all four listeners', async () => {
diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts
index d83315ba7e..8c4cfaf506 100644
--- a/packages/core/agent/src/types.ts
+++ b/packages/core/agent/src/types.ts
@@ -204,10 +204,9 @@ declare module 'cordis' {
      */
     'agent/inbox/inserted'(this: Scoped<Agent>, agent: Agent, event: { message: UserMessage }): void
     /**
-     * One message left the inbox for a turn. If the turn boundary that
-     * claimed it is rejected, the claimed message ends here: it is neither
-     * discarded nor re-emitted as a user/message, and a later batch may
-     * reuse the same turn number.
+     * One message left the inbox inside its open turn. If the proposed step
+     * is rejected, the claimed message ends here: it is neither discarded nor
+     * re-emitted as a user/message, and the turn closes without a step.
      * @param agent - the agent whose inbox changed.
      * @param event - the claimed message and owning turn.
      * Scope-filtered dispatch (`@deepseek-ai/dsh-scope`): agent-scoped listeners receive only that agent.
diff --git a/packages/core/session/src/types.ts b/packages/core/session/src/types.ts
index 352737e4b5..0c4c3c822e 100644
--- a/packages/core/session/src/types.ts
+++ b/packages/core/session/src/types.ts
@@ -189,9 +189,10 @@ export type RequestHeaderReason = 'initial' | 'resume' | 'change'
  */
 export interface SessionEventMap {
   /**
-   * Opens turn `turn`. Every turn begins after the loop claims queued input
-   * and accepts the pre-step result; the following identified `user/message`
-   * event or batch records the messages entering the step.
+   * Opens turn `turn` before the loop claims queued input or runs pre-step.
+   * Rejection, empty input, cancellation, or failure may close it with no
+   * step; otherwise the following identified `user/message` event or batch
+   * records the messages entering the step.
    */
   'turn/start': { turn: number }
   /**
diff --git a/packages/hooks/hook-protocol/README.i18n.yaml b/packages/hooks/hook-protocol/README.i18n.yaml
index deed052066..dda161c2d7 100644
--- a/packages/hooks/hook-protocol/README.i18n.yaml
+++ b/packages/hooks/hook-protocol/README.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 packages/hooks/hook-protocol/README.md
-README.md: 8cf4b95c95d43b8fbc27bbdcaf727dabf7d96805
-README.zh.md: 15a537b67677a401ab434a3e73af1973030780c0
+README.md: e807d9597eb5f811195bab9a0ad2b30b545e1205
+README.zh.md: f9990c046d4e52a2fa911776e92fcf397d159633
diff --git a/packages/hooks/hook-protocol/README.md b/packages/hooks/hook-protocol/README.md
index 8cf4b95c95..e807d9597e 100644
--- a/packages/hooks/hook-protocol/README.md
+++ b/packages/hooks/hook-protocol/README.md
@@ -29,7 +29,7 @@ Why a shared lib at all: Codex deliberately reimplements a *subset* of the Claud
 
 Declaration-merged into `SessionEventMap` (log-only, like `compact/*` — NOT a `SurfaceEventType`, no `surfaceOp`): `hook/invoked` (a hook command ran) and `hook/result` (its outcome, paired by `handlerId`, with `appendHookResult` owning the decision rule). Payloads and per-event JSDoc are in the generated [persistence log event catalog](../../../docs/persistence-catalog.md); `stderrSummary` is truncated to the record's `stderrSummaryMaxChars` (the bridge's config, reference default `DEFAULT_STDERR_SUMMARY_MAX_CHARS` = 500; omitted when empty).
 
-Hook provenance records must sit inside an open turn. The mid-turn points (`PreToolUse`/`PostToolUse`/`Stop`) satisfy that owner-defined relation by construction. `SessionStart` and the pre-turn `UserPromptSubmit` admission seam get no `hook/*` record; allowed context is instead evidenced by its sourced `user/message` — see the hooks Agent Note.
+Hook provenance records must sit inside an open turn. `UserPromptSubmit`, `PreToolUse`, `PostToolUse`, and `Stop` satisfy that owner-defined relation by construction. `SessionStart` runs before turn 1 and gets no `hook/*` record; its allowed context remains pending in the inbox until a waking delivery opens a turn — see the hooks Agent Note.
 
 ## Model Experience
 
diff --git a/packages/hooks/hook-protocol/README.zh.md b/packages/hooks/hook-protocol/README.zh.md
index 15a537b676..f9990c046d 100644
--- a/packages/hooks/hook-protocol/README.zh.md
+++ b/packages/hooks/hook-protocol/README.zh.md
@@ -29,7 +29,7 @@ Claude Code／Codex hook 协议格式（wire format）的**共享核心**。它
 
 通过 declaration merging 合并到 `SessionEventMap`（仅日志，与 `compact/*` 相同；不是 `SurfaceEventType`，没有 `surfaceOp`）：`hook/invoked`（hook 命令已运行）与 `hook/result`（其结果，按 `handlerId` 配对，决策规则由 `appendHookResult` 负责）。Payload 与每事件 JSDoc 位于生成的 [持久化日志事件目录](../../../docs/persistence-catalog.md)；`stderrSummary` 会截断到记录的 `stderrSummaryMaxChars`（桥接配置，参考默认值 `DEFAULT_STDERR_SUMMARY_MAX_CHARS` = 500；为空时省略）。
 
-Hook 溯源记录必须位于一个尚未结束的轮次内。轮次中的点（`PreToolUse`／`PostToolUse`／`Stop`）按构造满足这条由所有者定义的关系。`SessionStart` 与轮次前的 `UserPromptSubmit` 准入 seam 没有 `hook/*` 记录；获准的上下文改由其带来源的 `user/message` 作为证据，详见 hooks Agent Note。
+Hook 溯源记录必须位于一个尚未结束的轮次内。`UserPromptSubmit`、`PreToolUse`、`PostToolUse` 与 `Stop` 按构造满足这条由所有者定义的关系。`SessionStart` 在轮次 1 之前运行，因此没有 `hook/*` 记录；其获准的上下文会在 inbox 中保持待处理，直到唤醒交付打开一个轮次，详见 hooks Agent Note。
 
 ## 模型体验
 
diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts
index 6c92f27603..344c42e94f 100644
--- a/packages/hooks/hooks-claude/src/index.ts
+++ b/packages/hooks/hooks-claude/src/index.ts
@@ -129,8 +129,7 @@ export function apply(ctx: Context, config: Config): void {
    * Run every command hook configured for `point` whose matcher selects
    * `matchQuery`, with the per-event `payload` on stdin, and fold the results.
    * Writes a `hook/invoked`/`hook/result` pair per hook when `opts.turn` names
-   * an open turn. Pre-turn `UserPromptSubmit` and detached lifecycle points
-   * omit the pair. Returns the merged outcome (a neutral,
+   * an open turn. Detached lifecycle points omit the pair. Returns the merged outcome (a neutral,
    * already-most-restrictive view) for the caller to map onto its seam
    * decision. `matchQuery` is the event's matcher subject (tool name, session
    * source, …); `''` for events that ignore matchers.
@@ -217,10 +216,10 @@ export function apply(ctx: Context, config: Config): void {
 
   // --- UserPromptSubmit → PreStepDecision. The prompt text is the payload; no
   // matcher subject (CC ignores matchers for this event). ---
-  ctx.on('agent/pre-step', async (agent, messages, { signal }, next): Promise<PreStepDecision> => {
+  ctx.on('agent/pre-step', async (agent, messages, { turn, signal }, next): Promise<PreStepDecision> => {
     if (messages.length === 0) return next()
     const content = messages.flatMap(message => message.content)
-    const merged = await runPoint('UserPromptSubmit', '', promptPayload(ctx, agent, content), { agent, signal })
+    const merged = await runPoint('UserPromptSubmit', '', promptPayload(ctx, agent, content), { agent, turn, signal })
     if (merged.decision === 'deny') {
       return { kind: 'reject' }
     }
diff --git a/packages/hooks/hooks-claude/tests/bridge.spec.ts b/packages/hooks/hooks-claude/tests/bridge.spec.ts
index 3557fc1f87..1da2771257 100644
--- a/packages/hooks/hooks-claude/tests/bridge.spec.ts
+++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts
@@ -89,7 +89,7 @@ async function waitFor(predicate: () => boolean, timeout = 5000, interval = 10):
 }
 
 describe('hooks-claude bridge — UserPromptSubmit', () => {
-  it('a UserPromptSubmit hook that exits 2 rejects step entry without a turn', async () => {
+  it('a UserPromptSubmit hook that exits 2 closes a blocked turn without a step', async () => {
     // UserPromptSubmit ignores its malformed matcher field, then exit 2 blocks
     // with the reason on stderr.
     const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-'))
@@ -105,11 +105,11 @@ describe('hooks-claude bridge — UserPromptSubmit', () => {
     agent.followup(createUserMessage({ content: [{ type: 'text', text: 'do something' }], source: { kind: 'user' } }))
     await waitForIdle(ctx, agent)
 
-    // The prompt was blocked before the model and before a turn opened.
+    // The prompt was blocked inside its turn before any model step.
     expect(adapter.requests).toHaveLength(0)
-    expect(events(agent).some(e => e.type === 'turn/start')).toBe(false)
-    // Pre-step has no open turn in which turn-scoped hook provenance could live.
-    expect(events(agent).some(e => e.type === 'hook/invoked' || e.type === 'hook/result')).toBe(false)
+    expect(events(agent).filter(e => e.type === 'turn/start' || e.type === 'hook/invoked'
+      || e.type === 'hook/result' || e.type === 'turn/end').map(e => e.type))
+      .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
   })
 
   it('a UserPromptSubmit hook printing additionalContext injects it for the model', async () => {
@@ -399,7 +399,9 @@ describe('hooks-claude bridge — load resilience', () => {
     await waitForIdle(ctx, agent)
 
     expect(adapter.requests).toHaveLength(0)
-    expect(events(agent).some(event => event.type === 'turn/start')).toBe(false)
+    expect(events(agent).filter(event => event.type === 'turn/start' || event.type === 'hook/invoked'
+      || event.type === 'hook/result' || event.type === 'turn/end').map(event => event.type))
+      .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
     expect(warn).not.toHaveBeenCalledWith(expect.stringContaining('invalid claude regex matcher'))
   })
 
diff --git a/packages/hooks/hooks-claude/tests/coverage-cases.ts b/packages/hooks/hooks-claude/tests/coverage-cases.ts
index e539ae528c..f69d876d11 100644
--- a/packages/hooks/hooks-claude/tests/coverage-cases.ts
+++ b/packages/hooks/hooks-claude/tests/coverage-cases.ts
@@ -322,7 +322,9 @@ export function defineCoverageCases(group: CoverageGroup): void {
       const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
       agent.followup(createUserMessage({ content: [{ type: 'text', text: 'go' }], source: { kind: 'user' } }))
       await waitForIdle(ctx, agent)
-      expect(events(agent).some(e => e.type === 'turn/start')).toBe(false)
+      expect(events(agent).filter(e => e.type === 'turn/start' || e.type === 'hook/invoked'
+        || e.type === 'hook/result' || e.type === 'turn/end').map(e => e.type))
+        .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
     })
 
     it('a PreToolUse ask with NO reason omits the reason (false arm)', async () => {
@@ -505,7 +507,9 @@ export function defineCoverageCases(group: CoverageGroup): void {
       // recorded, and the (sole, fully-blocked) prompt closed the turn `rejected`
       expect(adapter.requests).toHaveLength(0)
       expect(events(agent).some(e => e.type === 'user/message' && e.data.source.kind !== 'user')).toBe(false)
-      expect(events(agent).some(e => e.type === 'turn/start')).toBe(false)
+      expect(events(agent).filter(e => e.type === 'turn/start' || e.type === 'hook/invoked'
+        || e.type === 'hook/result' || e.type === 'turn/end').map(e => e.type))
+        .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
     })
 
     it('preserves separate bridge and downstream prompt contexts with framing and metadata', async () => {
diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts
index e0587ba449..e96c1a555a 100644
--- a/packages/hooks/hooks-codex/src/index.ts
+++ b/packages/hooks/hooks-codex/src/index.ts
@@ -108,7 +108,7 @@ export function apply(ctx: Context, config: Config): void {
    * Run and fold one configured Codex hook point.
    *
    * A supplied turn records the hook provenance pair inside that open turn.
-   * Pre-turn `UserPromptSubmit` and detached lifecycle points omit it.
+   * Detached lifecycle points omit it.
    */
   async function runPoint(
     point: string,
@@ -203,7 +203,9 @@ export function apply(ctx: Context, config: Config): void {
       turn_id: String(turn),
       prompt: blocksToText(messages.flatMap(message => message.content)),
     }
-    const merged = await runPoint('UserPromptSubmit', '', payload, { agent, plainStdoutAsContext: true, signal })
+    const merged = await runPoint('UserPromptSubmit', '', payload, {
+      agent, turn, plainStdoutAsContext: true, signal,
+    })
     /* jscpd:ignore-start */
     if (merged.decision === 'deny') {
       return { kind: 'reject' }
diff --git a/packages/hooks/hooks-codex/tests/bridge.spec.ts b/packages/hooks/hooks-codex/tests/bridge.spec.ts
index 51bf2464f6..0878397edd 100644
--- a/packages/hooks/hooks-codex/tests/bridge.spec.ts
+++ b/packages/hooks/hooks-codex/tests/bridge.spec.ts
@@ -125,8 +125,9 @@ describe('hooks-codex bridge', () => {
 
     expect(() => process.kill(pid, 0)).toThrow()
     expect(adapter.requests).toHaveLength(0)
-    expect(events(agent).some(event => event.type === 'turn/start')).toBe(false)
-    expect(events(agent).some(event => event.type === 'hook/invoked' || event.type === 'hook/result')).toBe(false)
+    expect(events(agent).filter(event => event.type === 'turn/start' || event.type === 'hook/invoked'
+      || event.type === 'hook/result' || event.type === 'turn/end').map(event => event.type))
+      .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
   })
 
   it('only the five bridge-supported Codex events are honored — a SubagentStop entry is ignored', async () => {
diff --git a/packages/hooks/hooks-codex/tests/coverage-cases.ts b/packages/hooks/hooks-codex/tests/coverage-cases.ts
index 6ef51629ca..664f3cb2b4 100644
--- a/packages/hooks/hooks-codex/tests/coverage-cases.ts
+++ b/packages/hooks/hooks-codex/tests/coverage-cases.ts
@@ -81,7 +81,7 @@ export function defineCoverageCases(groups: CoverageGroup | readonly CoverageGro
       expect((await capture()).payload.transcript_path).toBeNull()
     }, 15_000) // Two real agent/hook subprocess loops need process startup and teardown headroom.
 
-    it('UserPromptSubmit block (exit 2) rejects step entry without a turn', async () => {
+    it('UserPromptSubmit block (exit 2) closes a blocked turn without a step', async () => {
       const d = dir()
       hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'b.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] })
       const adapter = new MockAdapter([textResponse('no')])
@@ -89,7 +89,9 @@ export function defineCoverageCases(groups: CoverageGroup | readonly CoverageGro
       const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
       agent.followup(createUserMessage({ content: [{ type: 'text', text: 'go' }], source: { kind: 'user' } })); await waitForIdle(ctx, agent)
       expect(adapter.requests).toHaveLength(0)
-      expect(events(agent).some(e => e.type === 'turn/start')).toBe(false)
+      expect(events(agent).filter(e => e.type === 'turn/start' || e.type === 'hook/invoked'
+        || e.type === 'hook/result' || e.type === 'turn/end').map(e => e.type))
+        .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
     })
 
     it('UserPromptSubmit additionalContext is injected; a no-op hook proceeds', async () => {
@@ -116,7 +118,9 @@ export function defineCoverageCases(groups: CoverageGroup | readonly CoverageGro
       agent.followup(createUserMessage({ content: [{ type: 'text', text: 'go' }], source: { kind: 'user' } })); await waitForIdle(ctx, agent)
       expect(adapter.requests).toHaveLength(0)
       expect(events(agent).some(e => e.type === 'user/message')).toBe(false)
-      expect(events(agent).some(e => e.type === 'turn/start')).toBe(false)
+      expect(events(agent).filter(e => e.type === 'turn/start' || e.type === 'hook/invoked'
+        || e.type === 'hook/result' || e.type === 'turn/end').map(e => e.type))
+        .toEqual(['turn/start', 'hook/invoked', 'hook/result', 'turn/end'])
     })
 
     it('preserves separate bridge and downstream prompt contexts with framing and metadata', async () => {