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feat(agent-loop): give each send its own turn

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pku-xht
2026-07-17 17:14:52 +08:00
parent 97c5ca940d
commit aa4e629874
26 changed files with 372 additions and 209 deletions
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12
docs/core-data-structures/session.md
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@@ -19,9 +19,8 @@ interface SessionEventMap {
/**
* A queued prompt an `agent/prompt-submit` listener VETOED — the durable
* record of a blocked prompt and why. Appended in place of the `user/message`
* the prompt would have become, so the block survives replay even in a MIXED
* batch where another queued prompt is allowed (there the turn does not end
* `rejected`, so the boundary reason alone would not preserve it). `content`
* the prompt would have become; that one-message turn runs zero steps and
* ends `rejected`. `content`
* is the original prompt the listener rejected; `reason` is the veto text
* ({@link PromptDecision} `block.reason`). NOT a {@link SurfaceEventType}: a
* blocked prompt produces no LLM message and never reaches `deriveMessages()`.
@@ -268,9 +267,8 @@ interface TurnEndReasonMap {
disposed: { kind: 'disposed' }
'max-tokens': { kind: 'max-tokens' }
/**
* The turn's entire prompt batch was BLOCKED before any step ran — every
* drained queued message was vetoed by an `agent/prompt-submit` listener (a
* hook). The turn still opened (so the boundary stays balanced and the block
* The turn's claimed prompt was BLOCKED before any step ran by an
* `agent/prompt-submit` listener (a hook). The turn still opened (so the boundary stays balanced and the block
* is a durable in-turn fact), but ran zero steps. `reason` carries the block
* message from the vetoing decision. Distinct from `aborted` (a user-driven
* cancel) and `error` (a failure): the prompt was rejected by policy, not
@@ -291,7 +289,7 @@ interface TurnEndReasonMap {
}
```
`max-tokens` mirrors the model-call `FinishReason` of the same name: any `max-tokens` step in a turn makes the whole turn end `max-tokens` rather than `completed` (the cut-short fact wins over a later continuation), so a consumer can tell a clean stop from a truncated one — but only over `completed`: the `disposed`/`aborted`/`error` outcomes take precedence. `rejected` is a zero-step turn whose whole prompt batch an `agent/prompt-submit` hook blocked (the ACP bridge maps it to `cancelled`). `interrupted` is the one reason no loop emits — it is synthesized by crash recovery (see [persistence.md](persistence.md)). Both maps are merge-extensible.
`max-tokens` mirrors the model-call `FinishReason` of the same name: any `max-tokens` step in a turn makes the whole turn end `max-tokens` rather than `completed` (the cut-short fact wins over a later continuation), so a consumer can tell a clean stop from a truncated one — but only over `completed`: the `disposed`/`aborted`/`error` outcomes take precedence. `rejected` is a zero-step turn whose claimed prompt an `agent/prompt-submit` hook blocked (the ACP bridge maps it to `cancelled`). `interrupted` is the one reason no loop emits — it is synthesized by crash recovery (see [persistence.md](persistence.md)). Both maps are merge-extensible.
## The turn-enclosure invariant