148 lines
5.3 KiB
Markdown
148 lines
5.3 KiB
Markdown
# 同会话目标
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[English](goal.md) | 中文
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事件溯源目标领域及其策略消费方共享的类型。[目标领域 Agent Note](../../.agents/notes/implemented/feature/2026-07-19-persisted-same-session-goal-domain.md)负责记录持久化与激活决策；本页记录 [`packages/goal/goal/src/types.ts`](../../packages/goal/goal/src/types.ts) 中的字面形态。
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## 标识与生命周期
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`GoalId` 是[品牌化 id](core.md#branded-ids)。调用方通过 `GoalRef` 修改一个确切修订版本；每次获准的持久变更都会递增修订号。
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```ts type-equiv
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/** Compare-and-set identity for one exact goal revision. */
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interface GoalRef {
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/** Stable goal identity. */
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readonly id: GoalId
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/** Positive revision; every durable mutation increments it. */
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readonly revision: number
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}
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```
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持久阶段回答目标发生了什么。进程本地激活状态则另行回答续跑消费方能否开始另一个 Round。
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```ts type-equiv
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/** Durable continuation phase. Activation is process-local and separate. */
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type GoalPhase =
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| 'active'
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| 'paused'
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| 'blocked'
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| 'complete'
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```
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阻塞是唯一表示「因问题而停止」的持久状态。由策略负责的阻塞原因会携带一个用于路由、稳定且采用 lower-kebab-case 的代码，以及一段供人和模型阅读的自由文本说明。
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```ts type-equiv
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/** Machine-routable and human-readable explanation for a blocked goal. */
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interface GoalBlockReason {
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/** Stable lower-kebab-case classification chosen by the blocking policy. */
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readonly code: string
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/** Non-empty explanation shown to humans and models. */
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readonly message: string
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}
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```
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```ts type-equiv
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/** Full durable state written by every non-clear goal mutation. */
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interface GoalSnapshot extends GoalRef {
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/** Human-requested completion objective. */
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readonly objective: string
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/** Durable lifecycle phase. */
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readonly phase: GoalPhase
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/** Present exactly while `phase` is `blocked`. */
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readonly blockedReason?: GoalBlockReason
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/** Total admitted goal-round cap. */
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readonly maxGoalRounds: number
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}
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```
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```ts type-equiv
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/** Current goal projection, including values derived from the session log. */
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interface GoalView extends GoalSnapshot {
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/** Highest admitted round number for this goal. */
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readonly roundsStarted: number
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/** Epoch milliseconds of the create mutation. */
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readonly createdAt: number
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/** Epoch milliseconds of the latest mutation. */
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readonly updatedAt: number
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/** Process-local continuation eligibility; never persisted. */
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readonly activation: GoalActivation
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}
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```
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## 持久变更
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每次变更都是 Round 编号为 0、来源为目标的 `user/message`，其元数据要么是完整快照，要么是清除墓碑。版本、元数据、目标来源和原样渲染的内容共同构成一项回放不变量。
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```ts type-equiv
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/** Full-snapshot goal mutation retained in a model-visible context event. */
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interface GoalSnapshotChangeMeta {
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readonly kind: 'goal/change'
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readonly version: 1
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readonly operation: Exclude<GoalOperation, 'clear'>
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readonly goal: GoalSnapshot
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readonly roundsStarted: number
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readonly createdAt: number
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readonly updatedAt: number
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}
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```
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```ts type-equiv
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/** Tombstone retained when the current goal is cleared. */
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interface GoalClearChangeMeta {
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readonly kind: 'goal/change'
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readonly version: 1
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readonly operation: 'clear'
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readonly cleared: GoalRef
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readonly clearedAt: number
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}
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```
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目标状态变更使用 Round `0`。续跑消费方会为每个获准的用户消息轮次标注正数且连续的 Round 编号和当前修订号；回放会拒绝编号缺口、陈旧修订号、已停止阶段和超出上限。
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```ts type-equiv
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/** Message attribution for durable goal state and continuation rounds. */
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interface GoalMessageSource {
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readonly kind: 'goal'
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readonly goalId: GoalId
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readonly revision: number
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/** Zero for state changes; positive for admitted continuation rounds. */
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readonly round: number
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/** Complete durable mutation carried only by round-zero state-change messages. */
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readonly change?: GoalChangeMeta
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}
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```
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## 请求与通知
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创建操作会区分调用方省略字段与采用部署配置值这两种情况，`create()` 会在内部解析后者。编辑是局部替换，其运行时校验器要求至少提供一个字段。每条变更通知都会携带获准的操作和确切修订号；清除操作不带 `goal`。
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```ts type-equiv
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/** Input whose omitted round cap is resolved by the service configuration. */
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interface CreateGoalRequest {
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readonly objective: string
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readonly maxGoalRounds?: number
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}
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```
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```ts type-equiv
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/** Fields changed by an edit; at least one must be present. */
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interface EditGoalRequest {
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readonly objective?: string
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readonly maxGoalRounds?: number
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}
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```
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```ts type-equiv
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/** Live notification after one goal mutation has been accepted for logging. */
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interface GoalChanged {
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readonly operation: GoalOperation
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readonly ref: GoalRef
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/** Absent for a clear tombstone. */
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readonly goal?: GoalView
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}
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```
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## 服务行为
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[`GoalService`](../../packages/goal/goal/src/index.ts) 解析创建默认值、执行严格回放折叠、校验确切的活跃 agent 身份、以比较并设置方式执行变更、叠加待处理的注入变更，并发出 `goal/changed` 通知；监听器故障会被隔离。包 [README](../../packages/goal/goal/README.md) 负责记录可调用契约和面向模型的契约。
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