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fix(agent-loop): await final session flush

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Tianyi Cui
2026-07-27 23:41:27 +08:00
parent cb12fa7b90
commit fe22273e28
9 changed files with 100 additions and 17 deletions
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4
docs/architecture.i18n.yaml
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@@ -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: 3b0f72400ab1e6a9157aed2966b4a17c36e0c3ac
architecture.zh.md: fa21c82a686d88a9bbec02180feae1dd0dbf4e47
architecture.md: f00a8fd8f7fbda05579fa63cc4f09b29500af289
architecture.zh.md: b5d9507c02f752b23ab41a77a6fb5c266c577b66

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docs/architecture.md
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@@ -143,7 +143,7 @@ The session log is authoritative. `deriveMessages()` projects model history; raw
**Model-visible ⟺ logged**: messages at `step/start` plus the folded `request/header` reconstruct every request; package-owned `dsh-agent-loop/invariant` can assert this through `ctx.invariants` ([reconstructability](../.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.md)).
Durability is a plugin concern. Backends eagerly drain synchronous `session/event` notifications. `session/flush` barriers precede adapter dispatch, top-level tool dispatch, and the next request's `agent/step`. `SessionPersistence` stores `SessionEvent` directly and metadata in `SessionHeader`; JSONL defaults to checksummed Zstandard, while SQLite shares the contract ([decision](../.agents/notes/implemented/bug-fix/2026-07-21-semantic-session-checkpoints.md)).
Durability is a plugin concern. Backends eagerly drain synchronous `session/event` notifications. `session/flush` barriers precede each request and top-level tool dispatch, then follow `turn/end` before another queued turn or idle observation. `SessionPersistence` stores `SessionEvent` directly and metadata in `SessionHeader`; JSONL defaults to checksummed Zstandard, while SQLite shares the contract ([decision](../.agents/notes/implemented/bug-fix/2026-07-21-semantic-session-checkpoints.md)).
`ctx.sessions.appendOutOfBand()` adds plugin-owned log-only events to an open turn or creates a balanced, flushed zero-step turn. `session/title` folds latest-wins with source seqs and provenance; its immediate fallback and sole optional async provider never delay response. Forks inherit titles ([decision](../.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md)).

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docs/architecture.zh.md
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@@ -143,7 +143,7 @@ idle inject:
**模型可见 ⟺ 已记录**：`step/start` 时的消息与折叠后的 `request/header` 可以重建每个请求；该包的 `dsh-agent-loop/invariant` 可通过 `ctx.invariants` 断言这一点（[可重建性](../.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.md)）。
持久性由插件负责。后端会尽快排空同步的 `session/event` 通知。`session/flush` 屏障位于适配器分发前、顶层工具分发前，以及下一次请求的 `agent/step`。`SessionPersistence` 直接存储 `SessionEvent`，并将元数据存入 `SessionHeader`；JSONL 默认采用带校验和的 Zstandard，SQLite 遵循同一契约（[决策](../.agents/notes/implemented/bug-fix/2026-07-21-semantic-session-checkpoints.md)）。
持久性由插件负责。后端会尽快排空同步的 `session/event` 通知。`session/flush` 屏障位于每次请求与顶层工具分发之前，并在 `turn/end` 之后、处理另一个已排队轮次或观察到空闲状态之前执行。`SessionPersistence` 直接存储 `SessionEvent`，并将元数据存入 `SessionHeader`；JSONL 默认采用带校验和的 Zstandard，SQLite 遵循同一契约（[决策](../.agents/notes/implemented/bug-fix/2026-07-21-semantic-session-checkpoints.md)）。
`ctx.sessions.appendOutOfBand()` 会把插件所属的纯日志事件加入开放轮次，或创建一个平衡且已刷写的零步骤轮次。`session/title` 按后写覆盖方式折叠，并携带源 seq 和来源信息；其即时回退标题和唯一可选异步提供方都不会延迟响应。fork 会继承标题（[决策](../.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md)）。