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# Conflicts:
#	docs/cookbook/extension-cookbook.i18n.yaml
#	docs/cookbook/extension-cookbook.zh.md
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Tianyi Cui
2026-07-24 21:20:17 +08:00
parent 199f59dc5e aef844e2e6
commit 2584f029bc
203 changed files with 2997 additions and 1263 deletions
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docs/core-data-structures/session.zh.md
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@@ -11,7 +11,13 @@
仅追加的事件类型。可通过声明合并扩展：插件通过 declaration merging 声明额外的事件类型。例如[压缩（compaction） seam](compaction.md) 添加了 `compact/start` / `compact/summary` / `compact/end`，`@deepseek-ai/dsh-hook-protocol` 添加了仅记录日志的 `hook/invoked` / `hook/result` 溯源事件，用于钩子桥接。与 `compact/*` 一样，这些都不是 `SurfaceEventType`（没有 `surfaceOp`）。生成的[持久化日志事件目录](../persistence-catalog.md)列举了所有成员（核心与合并扩展的），包含其 payload、surface 标记与声明位置。
```ts type-equiv
/** Shared payload for ordinary and steering prompt messages. */
/**
* Shared payload for user, injected-context, and steering prompt messages. A
* direct human prompt, a synthetic `agent.inject()` context, and mid-turn
* steering all project into the model transcript as verbatim user-role content;
* they are told apart by `source` (a non-`user` kind marks injected context),
* not by event type. `meta` carries durable model-hidden producer state.
*/
interface PromptMessageData {
/** Exact model-facing blocks, including any baked prompt-prefix contexts. */
content: ContentBlock[]
@@ -19,6 +25,15 @@ interface PromptMessageData {
source: MessageSource
/** Present only when prompt-prefix contexts were baked into `content`. */
envelope?: PromptMessageEnvelope
/**
* Opaque durable JSON state retained on the event but hidden from the model
* projection. It is the intended channel for a future framing directive (a
* producer declares the frame, a dedicated renderer applies it — see the
* deferred note in
* ../../../../.agents/notes/implemented/simplification/2026-07-20-unwrap-injected-content-envelopes.md),
* so the surface keeps projecting `content` verbatim rather than wrapping it.
*/
meta?: JsonValue
}
```
@@ -48,29 +63,21 @@ interface SessionEventMap {
'step/start': { turn: number; step: number }
/** Closes step `step` of turn `turn`. */
'step/end': { turn: number; step: number }
/** A user-visible prompt (the queued message claimed for this turn). */
/**
* A user-role message on the model-visible surface: a direct human prompt
* (the queued message claimed for this turn), a synthetic `agent.inject()`
* context (file-change notices, subdir AGENTS.md, skill content, cron
* notifications, …), or an admitted goal continuation round. All three
* project their `content` verbatim; `source` (with a non-`user` kind marking
* injected context) is the only channel that tells them apart. An idle
* injection wraps this event in a one-shot turn so the log stays turn-enclosed.
*/
'user/message': PromptMessageData
/**
* Durable record of a prompt veto and its reason. It is log-only: the blocked
* prompt never enters the model-visible surface, and its turn runs zero steps.
*/
'prompt/blocked': { content: ContentBlock[]; source: MessageSource; reason: string }
/**
* In-session context injection (file-change notices, subdir AGENTS.md,
* skill content, cron notifications, …). Rendered into the derived history
* as a synthetic user-role message carrying `content` verbatim — NOT a
* user prompt. `meta` is durable JSON state omitted from the model
* projection; it is also the intended channel for any future framing
* directive (a producer declares the frame, a dedicated renderer applies it —
* see the deferred note in
* ../../../../.agents/notes/implemented/simplification/2026-07-20-unwrap-injected-content-envelopes.md),
* so the surface keeps projecting `content` verbatim rather than wrapping it.
*/
'context/message': {
content: ContentBlock[]
source: MessageSource
meta?: JsonValue
}
/** Raw stream chunk — token-level replay fidelity. */
'assistant/chunk': { turn: number; step: number; chunk: StreamChunk }
/**
@@ -203,7 +210,7 @@ interface EpochHeader {
*
* The {@link sourceEventSeqs} and {@link surfaceOp} fields are conditional:
* they only exist on {@link SurfaceEventType} variants (`user/message`,
* `assistant/message`, `tool/result`, `context/message`, `steering/message`).
* `assistant/message`, `tool/result`, `steering/message`).
* Non-surface events (boundary markers, chunks, usage, errors) never carry
* surface metadata — the compiler enforces this at `Session.append()`
* call sites.
@@ -237,7 +244,7 @@ type SessionEvent<T extends SessionEventType = SessionEventType> = {
## Surface 类型
五种产生消息的类型（`SurfaceEventType`：`user/message`、`assistant/message`、`tool/result`、`context/message`、`steering/message`）携带 surface 元数据，用来声明它们如何加入有序的派生 surface。见 [session surface Agent Note](../../.agents/notes/implemented/architecture/2026-06-18-session-surface.md)。
四种产生消息的类型（`SurfaceEventType`：`user/message`、`assistant/message`、`tool/result`、`steering/message`）携带 surface 元数据，用来声明它们如何加入有序的派生 surface。见 [session surface Agent Note](../../.agents/notes/implemented/architecture/2026-06-18-session-surface.md)。
### `SurfaceEventType`：事件类型中产生消息的子集
@@ -251,7 +258,6 @@ type SurfaceEventType =
| 'user/message'
| 'assistant/message'
| 'tool/result'
| 'context/message'
| 'steering/message'
```
@@ -262,7 +268,7 @@ type SurfaceEventType =
* How a session event entered the ordered surface. Only valid on
* {@link SurfaceEventType} events.
*
* - `'append'`: added to the tail — normal path for user/assistant/tool/context
* - `'append'`: added to the tail — normal path for user/assistant/tool/steering
* messages.
* - `{ op: 'replace', start, end }`: replaces surface nodes from `start`
* (inclusive) through `end` (inclusive) with this node. Both must exist as
@@ -469,7 +475,7 @@ declare class Session {
- `user/message` → 一条携带确切 `content` 的 user 消息；可选 envelope 仅作为日志中的展示元数据保留。
- `assistant/message` → 一条 assistant 消息，包含事件的提供方/模型溯源信息和可选的适配器私有回放状态。原始 `assistant/chunk` 事件属于回放/UI 数据，在派生时会被**跳过**（组装后的消息才是权威）。**内容为空的** `assistant/message` 也会跳过：因 max-tokens 而截断且无内容的步骤仍会记录一条 `assistant/message` 以承载用量和溯源信息，但无内容的 assistant 轮次不得进入提供方 transcript。
- `tool/result` → 一条携带 `tool-result` 块的 user 消息。
- `context/message` → 按时间顺序在相应位置生成一条 user-role 消息，并原样承载其 `content`。可选的 JSON `meta` 保留在事件日志中，绝不渲染。
- `user/message`（注入上下文，即非 `user` 来源）→ 按时间顺序在相应位置生成一条 user-role 消息，并原样承载其 `content`。可选的 JSON `meta` 保留在事件日志中，绝不渲染。
- `steering/message` → 按时间顺序在相应位置生成一条携带确切 `content` 的 user-role 消息；可选 envelope 仅作为日志中的展示元数据保留。
其余所有事件（`turn/*`、`step/*`、插件所有的 `llm/retry`）均为结构信息，不会投影为消息。token 记账读取每个步骤的 `assistant/chunk { type: 'usage' }` 记录；如果没有用量分片，则将 `assistant/message.usage` 作为已提交步骤的后备。失败的模型请求尝试没有 assistant 消息，因此其用量分片是持久化的记账记录。操作错误的步骤号记录在 `turn/end.reason`（`kind: 'error'`）中；如果是最终模型请求失败，其中包含规范化的 `LlmFailure` 事实，其他实时错误则包含消息/代码。由于这一尚未发布的格式有意不提供兼容性承诺，seed/load 校验会拒绝缺少提供方和模型的请求头，以及缺少提供方/模型溯源信息的 assistant 消息，而不会猜测历史数据应走的提供方路由。
@@ -493,11 +499,12 @@ interface TurnTriggerMap {
message: { kind: 'message'; source: MessageSource }
/**
* An out-of-band context injection (`agent.inject()`) made while the agent
* was idle. The loop wraps the injected `context/message` in a one-shot turn
* (`turn/start` → `context/message` → `turn/end`) so every event in the log
* stays turn-enclosed — the durability/replay boundary is the turn, and a
* bare event between turns would otherwise be indistinguishable from a crash
* tail on reload.
* was idle. The loop wraps the injected `user/message` (a non-`user` source,
* plugin by default) in a one-shot turn (`turn/start` → `user/message` →
* `turn/end`) so every event in the log stays turn-enclosed — the
* durability/replay boundary is the turn, and a bare event between turns would
* otherwise be indistinguishable from a crash tail on reload. The trigger's
* `source` mirrors that message's producer.
*/
injection: { kind: 'injection'; source: MessageSource }
}
@@ -548,13 +555,13 @@ interface TurnEndReasonMap {
## 轮次封闭不变式
每个会话事件都位于一个轮次**之内**（在 `turn/start` 和对应的 `turn/end` 之间）。loop 在 `turn/start` *之后*追加已排队的 `user/message` 事件；空闲时的 `agent.inject()` 会用一次性的 `injection` 轮次包住其 `context/message`；没有打开的轮次时，`appendOutOfBand()` 同样会用一个轮次包住符合条件的仅日志事件。这使轮次成为唯一的持久性/回放边界：后端可以将最后一个 `turn/end` 之后的任何内容视为崩溃中断尾部，而不会丢失合法记录在轮次之间的上下文。可选的 `dsh-session/invariant` 配套插件通过 `ctx.invariants` 在开发环境中强制此不变式（消息事件若位于打开的轮次之外便会抛出）。见[轮次封闭不变式 Agent Note](../../.agents/notes/implemented/architecture/2026-06-15-turn-enclosure-invariant.md)。
每个会话事件都位于一个轮次**之内**（在 `turn/start` 和对应的 `turn/end` 之间）。loop 在 `turn/start` *之后*追加已排队的 `user/message` 事件；空闲时的 `agent.inject()` 会用一次性的 `injection` 轮次包住其 `user/message`；没有打开的轮次时，`appendOutOfBand()` 同样会用一个轮次包住符合条件的仅日志事件。这使轮次成为唯一的持久性/回放边界：后端可以将最后一个 `turn/end` 之后的任何内容视为崩溃中断尾部，而不会丢失合法记录在轮次之间的上下文。可选的 `dsh-session/invariant` 配套插件通过 `ctx.invariants` 在开发环境中强制此不变式（消息事件若位于打开的轮次之外便会抛出）。见[轮次封闭不变式 Agent Note](../../.agents/notes/implemented/architecture/2026-06-15-turn-enclosure-invariant.md)。
## 插件贡献的仅日志事件
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），但与所有事件一样，必须位于一个打开的轮次内。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`/`UserPromptSubmit`/`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：它注入的 `context/message` 已是持久证据，而且当时没有已打开的轮次可容纳该记录（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。轮次中间的钩子点（`PreToolUse`/`PostToolUse`/`UserPromptSubmit`/`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：它注入的 `user/message` 已是持久证据，而且当时没有已打开的轮次可容纳该记录（见[钩子桥接 Agent Note](../../.agents/notes/implemented/feature/2026-06-30-hook-bridges.md)）。
## 持久性契约