Merge remote-tracking branch 'origin/master' into scoped-layers-store

# Conflicts:
#	docs/architecture.md

.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.md

@@ -26,7 +26,7 @@ Each step rebuilds prompt assembly. On the instance's first step, `agent/session
 
 **`step/start` is the reconstruction boundary.** A step derives messages from events before that sequence. Injection after the snapshot joins the next request, and reentrant appends are rejected during event publication. `agent/pre-step(agent, turn, step, signal)` remains the generic seam for content needed by the current request. Header reconstruction selects the step's `request/header`, or carries the prior snapshot when no new header is written.
 
-**Enforcement.** The `dsh-agent-loop/invariant` companion registers with `ctx.invariants` and, when selected, independently rebuilds each loop request through a fresh `Session`, so the live cache cannot vouch for itself, then compares messages and folded header fields at `llm/stream`. The loop applies an internal non-enumerable identity before freezing each request; the independently built companion recognizes that identity, while direct one-shots remain excluded regardless of their frozen shape or session id. Correctness depends on sequence-bounded reconstruction rather than listener order. A with-key e2e requires positive cache-read tokens after the first request; per-step usage is the production signal, and a header change or compaction appears as a cache-read drop on the next step.
+**Enforcement.** The `dsh-agent-loop/invariant` companion registers with `ctx.invariants` and, when selected, independently rebuilds each loop request through a fresh `Session`, so the live cache cannot vouch for itself, then compares messages and folded header fields at `llm/stream`. The loop records the exact frozen request through `markAgentLoopRequest()` in `dsh-llm`; the process-local identity lets the companion and other request observers recognize conversation work, while direct one-shots remain excluded regardless of their frozen shape or session id. Correctness depends on sequence-bounded reconstruction rather than listener order. A with-key e2e requires positive cache-read tokens after the first request; per-step usage is the production signal, and a header change or compaction appears as a cache-read drop on the next step.
 
 ### The MiniCode shape: adopted, with the provenance arrow inverted
 

.agents/notes/implemented/architecture/2026-07-05-windows-fs-permissions.md

@@ -0,0 +1,31 @@
+# Agent Note: Windows write-permission semantics — inherited DACLs, not mode bits
+
+Status: implemented
+
+The replacement-file decision in this record is superseded by [Windows DACL preservation](../bug-fix/2026-07-19-windows-atomic-write-dacl-preservation.md).
+
+## Problem
+
+`writeFileAtomic` in `@deepseek-ai/dsh-fs-local` protects write-in-progress content with POSIX mode bits: the staging directory is created `0o700`, the temp file is opened `0o600`, and new files default to `0o600`. On POSIX this keeps temporary content owner-only regardless of the parent directory's permissions.
+
+Windows has no working equivalent behind the same API. Node's `chmod` there drives only the read-only attribute (every mode this package passes carries owner-write, so the calls are benign no-ops), and `stat().mode` reports synthetic `0o666`/`0o444` bits. The real security state is the file's DACL: a newly created file or directory inherits from its parent, while replacement needs the explicit handling owned by the superseding Agent Note.
+
+## Decision
+
+New Windows files use directory inheritance rather than synthetic mode bits: the staging directory is created inside the target's parent directory (`dirname(absolutePath)`), so it and the temp file inherit the destination directory's DACL. Replacement files follow the stricter [DACL preservation contract](../bug-fix/2026-07-19-windows-atomic-write-dacl-preservation.md).
+
+Tests assert mode bits on POSIX only. Native Windows coverage pins the package-owned replacement behavior; new-file inheritance remains an operating-system contract rather than a machine-specific ACL allowlist.
+
+## Alternatives considered
+
+**Explicit owner-only DACLs for new files.** Rejected because they would break inheritance and surprise users whose project directories are deliberately shared. Replacement writes copy the target's existing DACL rather than inventing an owner-only policy.
+
+**Test-side ACL verification.** A `Get-Acl` SID allowlist or `icacls` would verify Windows inheritance and the machine's `%TEMP%` ACL rather than package behavior; `icacls` also localizes well-known account names, making parsing locale-fragile.
+
+**Skip `chmod` on Windows.** Platform-guarding benign no-op calls adds branches without changing behavior.
+
+## Consequences
+
+POSIX keeps owner-only temp content regardless of the parent directory. A new Windows target inside a broadly accessible directory inherits that accessibility by design; a replacement retains the target's narrower DACL when one exists.
+
+Mode preservation across a replace degenerates to a no-op on Windows: a writable file probes as `0o666`, and replaying that through `chmod` leaves the read-only attribute clear. A read-only target cannot be replaced there because publication fails before the synthetic mode would matter.

.agents/notes/implemented/architecture/2026-07-05-windows-jsonl-durable-publish.md

@@ -0,0 +1,33 @@
+# Agent Note: Windows-native durable JSONL publication
+
+Status: implemented
+
+## Problem
+
+`dsh-session-persistence-jsonl` publishes a session log lazily on the first append. The POSIX protocol writes a temp file, fsyncs it, links it to the final name, fsyncs the parent directory, and then removes the temp link. The parent-directory fsync is part of the durability contract: a crash after the namespace change must not lose the committed final name while leaving callers believing the session log materialized.
+
+Windows has atomic namespace operations, but Node does not expose a POSIX-equivalent parent-directory fsync contract there. Treating Windows directory sync failures as success would silently weaken a durable backend. The Windows path therefore needs a different publication primitive rather than a conditional inside the POSIX `syncDir` helper.
+
+## Decision
+
+The JSONL backend forks inside `materialize()` before any namespace mutation. Shared code computes the session directory, final log path, and encoded header plus initial event batch; POSIX and Windows then run separate publication protocols.
+
+POSIX keeps the existing protocol: create the root and cwd bucket with parent directory fsyncs, write and fsync a temp file, publish with `link()` so an existing final log is never overwritten, fsync the bucket directory, then remove the redundant temp hard link.
+
+Windows creates missing directories through a durable staging publish: create a random sibling directory, then publish it to the final directory name with `MoveFileExW(..., MOVEFILE_WRITE_THROUGH)` without `MOVEFILE_REPLACE_EXISTING` or `MOVEFILE_COPY_ALLOWED`. File materialization writes and fsyncs the temp log, then publishes that temp file to the final path with the same write-through `MoveFileExW` call and no replacement. `koffi` is the minimal Win32 bridge for this API surface; its install script is allowed in `pnpm-workspace.yaml` because the package ships the native loader and prebuilt platform modules.
+
+## Alternatives considered
+
+**Ignore Windows directory-sync failures.** Rejected because it reports a first append as durable without forcing the published namespace entry to stable storage.
+
+**Use `CreateHardLinkW`.** Rejected because hard links are filesystem-dependent, do not publish directories, and expose no write-through option.
+
+**Use replacement or transactional APIs.** `ReplaceFileW` has replacement semantics that conflict with same-id collision rejection, and Transactional NTFS is not recommended for new application designs.
+
+## Consequences
+
+The backend keeps one external contract across platforms: first append either publishes a complete log at the final name or fails without overwriting an existing log. The platform split is an implementation detail; `SessionPersistence` APIs and the logical JSONL record format do not change. The later [Zstandard encoding decision](2026-07-19-zstandard-jsonl-session-logs.md) applies before either platform publishes the opaque bytes.
+
+Windows tests exercise the real Win32 publish path on native Windows. Power-loss behavior remains an API-contract property rather than something unit tests can prove; the testable invariants are that directory fsync is not called on Windows materialization, final-path collisions fail, temp logs are fsync'd before publication, and the resulting log loads normally.
+
+Append and repair still use ordinary file-handle fsyncs on both platforms. A failed append closes its append-only handle, reopens the log read/write, truncates it to the pre-append size, and fsyncs the rollback because Windows rejects `ftruncate` on append-only handles.

.agents/notes/implemented/architecture/2026-07-15-replay-token-meter-service.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
-2026-07-15-replay-token-meter-service.md: 4bedbb0cb9fa383108a688dbbb32546c7f39bd20
+2026-07-15-replay-token-meter-service.md: 3496364663c1f73b8161461d1a229b19d9730c6d
-2026-07-15-replay-token-meter-service.zh.md: ccf1b014cd86d16ef498b4209818e78be562e66f
+2026-07-15-replay-token-meter-service.zh.md: 0bc4d9decac36bd5674cd0fb04f82fdcd277554e

.agents/notes/implemented/architecture/2026-07-15-replay-token-meter-service.md

@@ -32,7 +32,7 @@ Usage sums the disjoint input, cache-read, cache-write, and output buckets. Reas
 
 `dsh-compact-basic` requires `ctx.tokenMeter`; `CompactService` gains no token methods or types. Configuration, the region transaction, and summarization stay in separate modules; the service registers automatic listeners itself, while `summarize()` remains its sole subclass hook. The singleton meter consistently prices pressure, retention, shadowed content, provenance, and non-shrinking-summary rejection.
 
-Automatic compaction uses one unified measurement for each threshold-and-retention decision. The region transaction measures after appending its durable `compact/start` lock and again after asynchronous summarization; any intervening durable append changes `logRevision` and prevents replacement.
+Automatic compaction uses one unified measurement for each threshold-and-retention decision. The region transaction measures after appending its durable `compact/start` lock and again after asynchronous summarization, then compares the detached surface-node vectors. An intervening surface mutation prevents replacement; `logRevision` may advance for unrelated log-only facts without invalidating an unchanged selected span.
 
 Compact policy has service-wide defaults: threshold ratio `0.8`, retained-tail ratio `0.16`, `summarizationProvider: ''`, `summarizationModel: ''`, `maxTokens: 8192`, `compactionRetries: 1`, `maxOverflowRetries: 1`, and `auto: true`. Top-level fields apply to every routed target; exact provider/model entries in `modelPolicies` partially override them. Pressure scales ratios against capacity resolved from the owning adapter, and `retainTokens` may replace `retainRatio`; retention must remain below the resulting threshold. The summarization provider and model must both be set or both be empty; an empty pair resolves the latest logged request target, then the `AgentOptions` pair.
 

.agents/notes/implemented/architecture/2026-07-15-replay-token-meter-service.zh.md

@@ -32,7 +32,7 @@ Usage 会对互不重叠的输入、缓存读取、缓存写入与输出 bucket
 
 `dsh-compact-basic` 要求 `ctx.tokenMeter`；`CompactService` 不增加 token 方法或类型。配置、区域事务与摘要器分别保留在独立模块中，服务自身注册自动监听器，而 `summarize()` 仍是唯一的子类 hook。单例计量器一致用于压力、保留、被遮蔽内容、来源以及非缩小摘要拒绝的定价。
 
-自动压缩的每次阈值与保留联合决策只使用一次统一计量。区域事务先追加持久 `compact/start` 锁，再执行一次计量，并在异步摘要完成后再次计量；期间任何持久追加都会改变 `logRevision`，从而阻止替换。
+自动压缩的每次阈值与保留联合决策只使用一次统一计量。区域事务会在追加持久 `compact/start` 锁后执行计量，在异步摘要完成后再次计量，随后比较分离的表层节点向量。期间发生的表层变更会阻止替换；`logRevision` 可以因无关的纯日志事实而推进，而不会使未变的选定范围失效。
 
 压缩策略采用服务级默认值：阈值比例 `0.8`、保留尾部比例 `0.16`、`summarizationProvider: ''`、`summarizationModel: ''`、`maxTokens: 8192`、`compactionRetries: 1`、`maxOverflowRetries: 1` 与 `auto: true`。顶层字段适用于每个路由目标；`modelPolicies` 中的精确提供方/模型项可以部分覆盖这些字段。压力检查根据所属适配器解析的容量缩放比例，`retainTokens` 可以替代 `retainRatio`；保留值必须小于最终阈值。摘要提供方与模型必须同时设置或同时为空；空组合先解析最近记录的请求目标，再使用 `AgentOptions` 中的组合。
 

.agents/notes/implemented/architecture/2026-07-19-zstandard-jsonl-session-logs.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
-2026-07-19-zstandard-jsonl-session-logs.md: 09d30594fe31eed138a128dabc1947b15857808d
+2026-07-19-zstandard-jsonl-session-logs.md: ccfc81dd47504e6a9e9b19cda7c4b9fc40accecc
-2026-07-19-zstandard-jsonl-session-logs.zh.md: 131531d9dba7cb01407191bf937f8b0ee3c6860a
+2026-07-19-zstandard-jsonl-session-logs.zh.md: de5436a6eaefcb45e52e0ff4fea8592c7efcd127

.agents/notes/implemented/architecture/2026-07-19-zstandard-jsonl-session-logs.md

@@ -24,7 +24,7 @@ The compressed artifact is a standard concatenation of independent [Zstandard fr
 
 Compression uses Node's built-in [`zstdCompress` and `zstdDecompress`](https://nodejs.org/download/release/v22.19.0/docs/api/zlib.html), available at the repository's Node 22.19 floor. The backend enables `ZSTD_c_checksumFlag`, otherwise accepts Node's defaults, and exposes neither a compression-level knob nor a new dependency. The API is marked experimental by Node, so the Node 22.19, 24, and 26 compatibility gate exercises the exact helper.
 
-First materialization compresses the two initial frames before opening the temporary file, then keeps the existing write, file `fsync`, collision-safe hard-link publication, and directory `fsync` sequence. Later batches are compressed before opening the destination and appended at EOF. A caught write or file-sync failure truncates to the prior byte length, syncs the rollback, and rethrows so the coordinator can retry the unchanged batch.
+First materialization compresses the two initial frames before opening the temporary file, then writes and `fsync`s that file. POSIX publishes it through a collision-safe hard link and directory `fsync`; Windows publishes it without replacement through `MoveFileExW(..., MOVEFILE_WRITE_THROUGH)`. Later batches are compressed before opening the destination and appended at EOF. A caught write or file-sync failure closes the append handle, reopens the log read/write, truncates to the prior byte length, syncs the rollback, and rethrows so the coordinator can retry the unchanged batch on both platforms.
 
 ### Read, listing, and crash recovery
 

.agents/notes/implemented/architecture/2026-07-19-zstandard-jsonl-session-logs.zh.md

@@ -24,7 +24,7 @@ JSONL 持久化后端会逐字保留每个 `SessionEvent`，其中包括数量
 
 压缩使用 Node 内置的 [`zstdCompress` 与 `zstdDecompress`](https://nodejs.org/download/release/v22.19.0/docs/api/zlib.html)，仓库最低支持的 Node 22.19 已提供这些 API。后端启用 `ZSTD_c_checksumFlag`，其余采用 Node 默认值，不公开压缩级别调节项，也不增加依赖。Node 将该 API 标记为实验性，因此 Node 22.19、24 与 26 兼容性门禁会执行同一个辅助实现。
 
-首次物化会在打开临时文件之前压缩两个初始帧，然后保留既有的写入、文件 `fsync`、避免冲突的硬链接发布与目录 `fsync` 顺序。后续批次也会先压缩，再打开目标并在 EOF 追加。捕获到写入或文件同步失败时，后端会截断到原有字节长度，同步回滚结果，再重新抛出错误，让协调器重试未变化的批次。
+首次物化会在打开临时文件之前压缩两个初始帧，然后写入该文件并执行 `fsync`。POSIX 通过避免冲突的硬链接和目录 `fsync` 发布该文件；Windows 通过 `MoveFileExW(..., MOVEFILE_WRITE_THROUGH)` 在不替换目标文件的情况下发布。后续批次也会先压缩，再打开目标并在 EOF 追加。捕获到写入或文件同步失败时，后端会关闭追加句柄，以读写方式重新打开日志，截断到原有字节长度，同步回滚结果，再重新抛出错误，让协调器能够在两个平台上重试未变化的批次。
 
 ### 读取、列举与崩溃恢复
 

.agents/notes/implemented/architecture/2026-07-24-single-harness-home-resolver.i18n.yaml

@@ -0,0 +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
+2026-07-24-single-harness-home-resolver.md: 10ed0e9f1fd6ac4630d92a66953fdf1d52b3b5f1
+2026-07-24-single-harness-home-resolver.zh.md: 1ce56281357595de134ddea285c8c2e0c1801ce9

.agents/notes/implemented/architecture/2026-07-24-single-harness-home-resolver.md

@@ -0,0 +1,41 @@
+# Agent Note: One harness home resolver
+
+Status: implemented
+
+English | [中文](2026-07-24-single-harness-home-resolver.zh.md)
+
+## Problem
+
+The harness had three inconsistent conventions for "where does DeepSeek Harness user data live":
+
+- `@deepseek-ai/dsh-home` resolved `configured ?? $DSH_HOME ?? ~/.dsh`.
+- `@deepseek-ai/dsh-paths` shipped a **second** `resolveDshHome` with the same precedence plus tilde expansion — a near-duplicate of `dsh-home` that no gate flagged because the two lived in different packages and had already drifted (only one expanded tildes).
+- `@deepseek-ai/dsh-telemetry`'s `globalConfigDir` used a *different* policy entirely: `DSH_CONFIG_HOME > $XDG_CONFIG_HOME/deepseek-harness > %APPDATA%/deepseek-harness > ~/.config/deepseek-harness`.
+
+So most of the product parked everything under one `~/.dsh` root while telemetry alone stored its anonymous id elsewhere, under a `deepseek-harness` namespace that contradicts the repo-wide `dsh` shorthand (`DSH_HOME`, `@deepseek-ai/dsh-*`, `~/.dsh`). Two resolvers plus a divergent third policy means no single home fact.
+
+## Decision
+
+One resolver owns the harness home, in `@deepseek-ai/dsh-paths`, single-root:
+
+```
+explicit configured path  >  $DSH_HOME  >  ~/.dsh
+```
+
+An empty or whitespace-only `$DSH_HOME` is treated as unset, matching the guard telemetry's old resolver carried: without it `resolve('')` would silently place the home at the current working directory. The harness keeps all user data under one root; there is no XDG config/data/cache split. `dshHomeDisplay()` names a resolved root symbolically for user-facing paths — `~/.dsh` for the default home, `$DSH_HOME` for any configured home — so the user-global `AGENTS.md` label never leaks an absolute machine path. It replaces workspace-context's bespoke default-vs-`$DSH_HOME` check.
+
+`@deepseek-ai/dsh-home` is deleted. Its three importers (`dsh-tool-bash`, `dsh-skill-local`, `dsh-agent-spine-demo`) now import `resolveDshHome` from `dsh-paths`. `dsh-telemetry`'s `globalConfigDir` delegates to `resolveDshHome`, dropping its second resolver, the `DSH_CONFIG_HOME` override, the XDG/`%APPDATA%` branches, and the `deepseek-harness` namespace; the anonymous id now lives directly under the harness home.
+
+## Alternatives considered
+
+**Leave the two `resolveDshHome` copies in place.** They had already drifted (one expands tildes, one didn't) and encode the same cross-cutting fact twice. Consolidation is the point of the `util/` layer; a duplicate resolver is a latent divergence bug.
+
+**Adopt XDG (honor `$XDG_CONFIG_HOME`, or split config/data/cache into separate trees).** Considered and dropped in favor of one obvious root. A single `$DSH_HOME || ~/.dsh` ground truth matches `~/.claude` / `~/.aws`, needs no per-kind reclassification of every `~/.dsh` consumer, and leaves no resolver asymmetry to reconcile. Telemetry aligning onto the same root — rather than keeping its own XDG path — is precisely the divergence this removes.
+
+**Keep telemetry's own config dir.** Its `deepseek-harness` namespace and separate XDG policy were the lone exception to the `dsh`/`~/.dsh` convention. Folding it onto the shared resolver is what makes "one home fact" true. The cost is that the anonymous id becomes scoped to `$DSH_HOME` rather than the machine: a project that points `DSH_HOME` at a repo-local path (or a command that loads a project `.env` before telemetry) gets a home-local id, so the id counts harness homes, not machines. This is accepted as the intended meaning of single-root — a relocated `$DSH_HOME` moves *all* harness state, telemetry identity included — and the module contract is stated as per-harness-home rather than per-machine. A machine-global identity that ignored `$DSH_HOME` would reintroduce exactly the second home policy this Note removes.
+
+## Consequences
+
+- One home fact, one resolver. `dsh-paths` is the sole owner; the `util/` group loses the `home` package.
+- Telemetry's anonymous id moves from `~/.config/deepseek-harness/telemetry.json` to the harness home (`~/.dsh/telemetry.json` by default). Under the pre-release "backends reject old formats" stance this needs no migration: an orphaned old id simply regenerates once, and the id is anonymous by construction.
+- Telemetry drops Windows `%APPDATA%` handling. `resolveDshHome` uses `os.homedir()`, which is correct on Windows; the harness does not special-case `%APPDATA%` for its single root.

.agents/notes/implemented/architecture/2026-07-24-single-harness-home-resolver.zh.md

@@ -0,0 +1,41 @@
+# Agent Note：单一 harness home 解析器
+
+Status: implemented
+
+[English](2026-07-24-single-harness-home-resolver.md) | 中文
+
+## 问题
+
+对于"DeepSeek Harness 用户数据存放在哪里"，harness 里存在三套互不一致的约定：
+
+- `@deepseek-ai/dsh-home` 按 `configured ?? $DSH_HOME ?? ~/.dsh` 解析。
+- `@deepseek-ai/dsh-paths` 又提供了**第二个** `resolveDshHome`，优先级相同但额外做了波浪号展开——它几乎是 `dsh-home` 的重复实现，却没有任何门禁发现，因为两者分属不同的包，而且早已漂移（只有一个会展开波浪号）。
+- `@deepseek-ai/dsh-telemetry` 的 `globalConfigDir` 采用了*完全不同*的策略：`DSH_CONFIG_HOME > $XDG_CONFIG_HOME/deepseek-harness > %APPDATA%/deepseek-harness > ~/.config/deepseek-harness`。
+
+于是产品的大部分内容都停放在同一个 `~/.dsh` 根目录下，唯独 telemetry 把匿名 id 存到别处，落在一个 `deepseek-harness` 命名空间里，这与全仓库通行的 `dsh` 简写（`DSH_HOME`、`@deepseek-ai/dsh-*`、`~/.dsh`）相冲突。两个解析器再加上一个各行其是的第三套策略，意味着不存在单一的 home 事实。
+
+## 决策
+
+由一个解析器统一掌管 harness home，落在 `@deepseek-ai/dsh-paths`，采用单一根目录：
+
+```
+explicit configured path  >  $DSH_HOME  >  ~/.dsh
+```
+
+空或仅含空白的 `$DSH_HOME` 被当作未设置处理，这与 telemetry 旧解析器所带的保护一致：若无此保护，`resolve('')` 会悄悄把 home 落在当前工作目录。harness 把所有用户数据都放在同一个根目录下；不存在 XDG 的 config/data/cache 拆分。`dshHomeDisplay()` 为面向用户的路径以符号形式命名已解析的根目录——默认 home 显示为 `~/.dsh`，任何已配置的 home 显示为 `$DSH_HOME`——这样面向用户全局的 `AGENTS.md` 标签就绝不会泄露机器上的绝对路径。它取代了 workspace-context 中自定义的"默认值 vs `$DSH_HOME`"判断。
+
+`@deepseek-ai/dsh-home` 被删除。它的三个引用方（`dsh-tool-bash`、`dsh-skill-local`、`dsh-agent-spine-demo`）现在从 `dsh-paths` 导入 `resolveDshHome`。`dsh-telemetry` 的 `globalConfigDir` 转而委托给 `resolveDshHome`，去掉了它的第二个解析器、`DSH_CONFIG_HOME` 覆盖项、XDG/`%APPDATA%` 分支以及 `deepseek-harness` 命名空间；匿名 id 现在直接存放在 harness home 之下。
+
+## 备选方案
+
+**保留两份 `resolveDshHome` 副本。** 它们早已漂移（一个展开波浪号，一个不展开），并把同一条横切事实编码了两遍。`util/` 层的意义正是在于合并，重复的解析器是一个潜在的分歧 bug。
+
+**采用 XDG（遵从 `$XDG_CONFIG_HOME`，或把 config/data/cache 拆分到各自的目录树）。** 经过考虑后放弃，转而采用一个显而易见的根目录。单一的 `$DSH_HOME || ~/.dsh` 基准事实与 `~/.claude` / `~/.aws` 一致，无需对每个 `~/.dsh` 消费方按类别重新归类，也不留下任何需要协调的解析器不对称。telemetry 对齐到同一根目录——而不是保留自己的 XDG 路径——正是本决策所要消除的那种分歧。
+
+**保留 telemetry 自己的 config 目录。** 它的 `deepseek-harness` 命名空间和独立的 XDG 策略是唯一违背 `dsh`/`~/.dsh` 约定的例外。把它折叠到共享解析器上，才让"单一 home 事实"成真。代价是匿名 id 的作用域从机器变成了 `$DSH_HOME`：若某个项目把 `DSH_HOME` 指向仓库本地路径（或某条命令在 telemetry 之前加载了项目的 `.env`），得到的就是 home 本地的 id，因此该 id 统计的是 harness home，而非机器。这被接受为单一根目录的应有含义——重定位 `$DSH_HOME` 会移动*全部* harness 状态，telemetry 身份也在其中——模块契约据此表述为 per-harness-home 而非 per-machine。一个忽略 `$DSH_HOME` 的机器级全局身份，恰恰会重新引入本 Note 所要消除的那第二套 home 策略。
+
+## 影响
+
+- 单一 home 事实，单一解析器。`dsh-paths` 是唯一归属方；`util/` 组失去了 `home` 包。
+- telemetry 的匿名 id 从 `~/.config/deepseek-harness/telemetry.json` 移到 harness home（默认为 `~/.dsh/telemetry.json`）。在预发布的"后端拒绝旧格式"立场下，这无需迁移：一个遗留的旧 id 只会重新生成一次，而且该 id 本就是匿名构造的。
+- telemetry 去掉了 Windows `%APPDATA%` 处理。`resolveDshHome` 使用 `os.homedir()`，这在 Windows 上是正确的；harness 不会为它的单一根目录对 `%APPDATA%` 做特殊处理。

.agents/notes/implemented/bug-fix/2026-07-19-windows-atomic-write-dacl-preservation.i18n.yaml

@@ -0,0 +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-windows-atomic-write-dacl-preservation.md: 013119508da9be426c417797cf7a0ec14e276814
+2026-07-19-windows-atomic-write-dacl-preservation.zh.md: 8ae82884c3b80409d07d3bbcfc8c273e8b227dc8

.agents/notes/implemented/bug-fix/2026-07-19-windows-atomic-write-dacl-preservation.md

@@ -0,0 +1,27 @@
+# Agent Note: Preserve Windows DACLs during atomic file replacement
+
+Status: implemented
+
+English | [中文](2026-07-19-windows-atomic-write-dacl-preservation.zh.md)
+
+## Problem
+
+On Windows, creating the staging directory and temp file under the target's parent and relying only on inherited DACLs is sufficient for a new file, but not for replacing an existing file whose explicit or protected DACL is narrower than its parent: content is written under the broader parent DACL, and rename carries that staging descriptor onto the replacement.
+
+## Decision
+
+`dsh-fs-local` reads an existing target's DACL with `GetFileSecurityW`, applies it to the empty temp file with inheritance protected before writing content, and publishes the closed temp with `ReplaceFileW`. The protected staging descriptor prevents the temp directory's inherited entries from broadening access; `ReplaceFileW` preserves the original target access policy and other replacement metadata. Its ACL merge may reserialize auto-inheritance state or duplicate equivalent ACEs, so self-relative descriptor buffers are not a stable equality contract. New files have no prior descriptor to preserve and continue to inherit the destination directory's DACL.
+
+Native Windows coverage protects a target DACL, inspects the written staging file, and compares the final replacement's ordered, de-duplicated ACE policy. Host-independent binding tests cover Win32 error translation and every native call boundary.
+
+## Alternatives considered
+
+**Rely on directory inheritance for replacements.** Rejected because a target may carry a narrower explicit or protected DACL than its parent, so inheritance neither protects staged content nor preserves the target access policy.
+
+**Use `ReplaceFileW` without protecting the temp.** Rejected because it repairs the final descriptor only after the content has already been written under the staging file's inherited DACL.
+
+**Install an owner-only DACL for every write.** Rejected because it would discard deliberate project sharing. Copying the target DACL preserves the deployment's existing access policy instead of inventing one.
+
+## Consequences
+
+Replacing a Windows file now requires permission to read the target DACL and set the temp DACL; failure is loud before content is written. The package carries Koffi for the narrow Win32 calls, loaded only on Windows replacement paths. New-file behavior remains directory-inherited, and POSIX mode behavior is unchanged.

.agents/notes/implemented/bug-fix/2026-07-19-windows-atomic-write-dacl-preservation.zh.md

@@ -0,0 +1,27 @@
+# Agent Note: Windows 原子文件替换期间保留 DACL
+
+Status: implemented
+
+[English](2026-07-19-windows-atomic-write-dacl-preservation.md) | 中文
+
+## 问题
+
+在 Windows 上，在目标文件的父目录下创建暂存目录和临时文件，并且只依赖继承的 DACL，足以满足新建文件的需要，但无法安全替换显式或受保护 DACL 比父目录更严格的现有文件：内容会在权限更宽松的父目录 DACL 下写入，而重命名又会把这个暂存安全描述符带到替换后的文件上。
+
+## 决策
+
+`dsh-fs-local` 通过 `GetFileSecurityW` 读取现有目标文件的 DACL，在写入内容前将其以禁止继承的形式应用到空临时文件，并通过 `ReplaceFileW` 发布已关闭的临时文件。受保护的暂存安全描述符可防止暂存目录中的继承条目扩大访问权限；`ReplaceFileW` 会保留原目标文件的访问策略及其他替换元数据。其 ACL 合并过程可能重新序列化自动继承状态或复制等价 ACE，因此不能把自相对安全描述符缓冲区的逐字节相等作为稳定契约。新建文件没有既有描述符需要保留，因此仍继承目标目录的 DACL。
+
+Windows 原生覆盖率测试会保护目标文件的 DACL、检查写入完成的暂存文件，并对比最终替换文件中保持顺序且去重后的 ACE 策略。与宿主平台无关的绑定测试覆盖 Win32 错误转换以及每个原生调用边界。
+
+## 备选方案
+
+**替换文件时依赖目录继承。** 不予采用，因为目标文件可能带有比父目录更严格的显式或受保护 DACL；目录继承既无法保护暂存内容，也无法保留目标文件的访问策略。
+
+**使用 `ReplaceFileW`，但不保护临时文件。** 不予采用，因为这只能在内容已经按暂存文件继承的 DACL 写入之后修复最终描述符。
+
+**每次写入都设置仅所有者可访问的 DACL。** 不予采用，因为这会破坏项目有意设置的共享权限。复制目标文件的 DACL 可以保留部署中已有的访问策略，无需另行创设策略。
+
+## 影响
+
+替换 Windows 文件现在要求调用方有权读取目标 DACL 并设置临时文件 DACL；如果权限不足，系统会在写入内容前明确失败。该包（package）引入 Koffi 以执行少量 Win32 调用，并且只在 Windows 替换路径上加载。新建文件仍按目录继承，POSIX mode 行为保持不变。

.agents/notes/implemented/feature/2026-06-18-compaction-capability-seam.md

@@ -93,6 +93,8 @@ The `compact/start … compact/end` bracket is justified, in order of what now d
 1. **Crash-detectable orphan + provenance** (primary). Summarization is a slow model call persisted *after* `compact/start`. A crash mid-summarization leaves a `compact/start` with no matching `compact/end` — a detectable orphan. Releasing the lock last (rather than first) converts the crash window from *silent corruption* into that detectable orphan.
 2. **Prevents concurrent compaction.** `compactRegion` refuses to start if the current turn holds an unmatched `compact/start`. (The loop is single-threaded across either awaited automatic seam, so this is also a re-entry tripwire — a thrown "already in progress" signals a real bug.)
 
+The lock excludes another compaction, not unrelated log-only facts. The basic backend snapshots the token meter's surface nodes after `compact/start` and compares them again after asynchronous summarization; any surface mutation rejects before replacement, while a title or other log-only append leaves the selected span valid.
+
 Two failure paths, both documented:
 
 - **Crash** (the loop dies mid-summarization): a dangling `compact/start`, no closer. Because `compact/*` are **log-only**, the orphan is **inert** — no summary replacement lands. The derived surface remains the durable surface present at `compact/start`: full history when pruning made no replacement, or the already-pruned history when it did. Generic turn-repair (`interruptedTurnClosers`) closes the turn with a synthetic `turn/end`; the orphan sits *before* that `turn/end`, so the turn-scoped in-progress check never sees it and a crash cannot wedge future compaction.

.agents/notes/implemented/feature/2026-07-10-agent-session-identity-and-log-location.md

@@ -31,7 +31,7 @@ The model-facing bash package owns a `ctx.bashEnv` registry. A contributor decla
 
 The registry rebuilds a trusted overlay for every foreground and background bash `ToolExecution`:
 
-- `DSH_HOME` is always the absolute configured Harness home. The standalone [`@deepseek-ai/dsh-home`](../../../../packages/util/home/README.md) utility owns its precedence: explicit `dshHome`, then ambient `$DSH_HOME`, then `~/.dsh`.
+- `DSH_HOME` is always the absolute configured Harness home. The standalone [`@deepseek-ai/dsh-paths`](../../../../packages/util/paths/README.md) utility owns its precedence: explicit `dshHome`, then ambient `$DSH_HOME`, then `~/.dsh`.
 - `DSH_SHELL=1` is always present and identifies a model bash child managed by DeepSeek Harness.
 - `DSH_SESSION_ID` is present when the execution has an agent and equals `agent.session.header.id`.
 - The built-in persistence translator contributes `DSH_SESSION_JSONL` only when `ctx.sessionPersistence.locate(header)` returns `kind: 'jsonl'`.
@@ -54,7 +54,7 @@ A fresh session receives its id before the first turn, so its first bash call ca
 
 Resume reuses the loaded header and therefore the same id and location. Fork and spawn create new session ids and locations. Parent and child calls resolve from their own `ToolExecution.agent`; each command receives an immutable snapshot even when calls overlap. A persistence service replacement affects later collections because the translator queries `ctx.get('sessionPersistence')` at execution time; the registry itself is effect-scoped and HMR-safe.
 
-`dshHome` is session-independent deployment context. Agent-core resolves one value through `@deepseek-ai/dsh-home` and routes it to both tool-bash and local skill discovery; standalone consumers call the same resolver. If top-level `dshHome` and `skills.local.dshHome` are both supplied and resolve differently, composition fails instead of exposing contradictory homes. Persistence may change independently without freezing its facts into the session prefix.
+`dshHome` is session-independent deployment context. Agent-core resolves one value through `@deepseek-ai/dsh-paths` and routes it to both tool-bash and local skill discovery; standalone consumers call the same resolver. If top-level `dshHome` and `skills.local.dshHome` are both supplied and resolve differently, composition fails instead of exposing contradictory homes. Persistence may change independently without freezing its facts into the session prefix.
 
 ## Testing
 

.agents/notes/implemented/feature/2026-07-14-cross-family-fs-sandbox.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
-2026-07-14-cross-family-fs-sandbox.md: 9b6312e5994469606bd1645902fc798f70258580
+2026-07-14-cross-family-fs-sandbox.md: 0897695cc14b7573ebb53f3ffa6a460652882b37
-2026-07-14-cross-family-fs-sandbox.zh.md: d4816e03d94bdf12b2db875d71dccb7db3a2c0d7
+2026-07-14-cross-family-fs-sandbox.zh.md: 15de061a0d2b18392f839c927e9b0f5d0cacf28b

.agents/notes/implemented/feature/2026-07-14-cross-family-fs-sandbox.md

@@ -31,7 +31,7 @@ Three coordinated pieces, all composed from the leaf `cordis.yml`, none touching
 `packages/fs/fs-sandbox/` (`@deepseek-ai/dsh-fs-sandbox`) mirrors the `bash-local`/`bash-sandbox` split: `SandboxedFileSystem extends LocalFileSystem`, registered as `ctx.fs`, injecting `sandboxPolicy`. Reads (`resolve`/`stat`/`readText`/`streamText`/`listDir`) pass through untouched — every mode permits reading. The two mutations enforce by mode before delegating to the inherited atomic write:
 
 - `read-only` denies `writeText`/`editText` outright.
-- `workspace-write` fences the canonicalized target against the writable-root set — `writableRoots(policy)` in `dsh-sandbox`: the workspace root plus the platform temp areas (`/tmp`, `os.tmpdir()`), each realpathed — the SAME set the Seatbelt profile grants, so the fs fence is the fourth dialect of one mode meaning alongside the bwrap/Landlock/Seatbelt profiles, and "the write tool cannot write `/tmp` but bash can" asymmetries cannot arise. Containment is prefix-inclusion on real paths; the target is re-canonicalized (`resolve` realpaths the deepest existing ancestor) immediately before delegating, so an ancestor symlink swapped since the tool resolved it is caught.
+- `workspace-write` fences the canonicalized target against the writable-root set — `writableRoots(policy)` in `dsh-sandbox`: the workspace root plus the platform temp areas (`/tmp`, `os.tmpdir()`), each realpathed — the SAME set the Seatbelt profile grants, so the fs fence is the fourth dialect of one mode meaning alongside the bwrap/Landlock/Seatbelt profiles, and "the write tool cannot write `/tmp` but bash can" asymmetries cannot arise. Canonical spellings take a lexical containment fast path; when Windows exposes one directory through different casing or long-name/8.3 spellings, an ancestor walk compares filesystem identity rather than weakening the boundary to textual prefix guesses. The target is re-canonicalized (`resolve` realpaths the deepest existing ancestor) immediately before delegating, so an ancestor symlink swapped since the tool resolved it is caught.
 - `danger-full-access` delegates unfenced.
 
 A denial is the structured `FS_SANDBOX_DENIED` carrying the effective mode — distinct from `FS_PERMISSION_DENIED` (a host EACCES is the world refusing; this is policy refusing). No text inference: an in-process fence knows exactly what it denied. The per-call carrier is a trailing optional `sandboxMode` on `writeText`/`editText` (the filesystem twin of `BashExecRequest.sandboxMode`); the seam stays session-free (the caller stamps, exactly as `resolve` takes a cwd), and the bare local backend carries-and-ignores it. `FileSystem.sandboxMode` is the capability fact (`undefined` on the base and `fs-local`, the default on `SandboxedFileSystem`), so the tool layer advertises escalation from composition truth.
@@ -74,7 +74,7 @@ The sandbox Agent Note's original cross-family sketch put fs enforcement on the
 What shipped — the tiers in § Testing hold each:
 
 - Under `read-only`, `write`/`edit` return the `[sandbox: file access denied under read-only mode]` marker and the disk is untouched; `read`/`listDir` behave identically to `dsh-fs-local`.
-- Under `workspace-write`, mutations land under the workspace root and the temp areas and are denied outside; the containment matrix — `..` traversal, absolute paths outside, a pre-existing symlinked directory inside pointing out, and a new file created under such a symlink — denies every escape on real disks.
+- Under `workspace-write`, mutations land under the workspace root and the temp areas and are denied outside; the containment matrix — `..` traversal, absolute paths outside, a pre-existing symlinked directory inside pointing out, a new file created under such a symlink, and alias-equivalent root spellings — denies every escape while admitting the same directory identity on real disks.
 - A denied fs mutation retried once with `sandbox_permissions` + `justification` prompts through the composed approval chain; a grant runs exactly that call under the wider mode and the write lands; rejected/cancelled/unavailable each produce their verbatim fail-closed text and mutate nothing.
 - One `permission` preset switch governs both families: after a session switches modes, the next bash call and the next fs mutation both honor the new mode from the same `sandbox/mode` fold.
 - A direct `ctx.fs.writeText` with no per-call stamp is confined at the deployment default.
@@ -90,5 +90,5 @@ Costs and accepted limits:
 
 ## Testing
 
-- Unit: `dsh-sandbox` pins the escalation ladder, the marker builders, the argument-pairing validation, and `approveEscalation`'s ordered fail-closed sequence (non-widening, no-approval, no-agent, each outcome), plus `writableRoots`/`canonicalPath`. `dsh-sandbox-policy` pins the default accessors, the fold/setter, the load-time mode rejection, and HMR safety. `dsh-fs-sandbox` pins the per-mode fence and the containment matrix (inside, temp area, absolute-outside, `..`, symlinked-out directory, new file under one, path-equals-root, root-ending-in-separator) on a real filesystem, plus the per-call override and HMR safety. `dsh-tool-fs` pins advertisement gating, the mode stamp, the fold, denial-marker mapping, and the full escalation matrix (grant, reject, no-service, no-agent, pairing, non-confining guard). `dsh-tool-bash`, `dsh-bash-sandbox`, and `dsh-permission` migrate to the relocated policy/kit.
+- Unit: `dsh-sandbox` pins the escalation ladder, the marker builders, the argument-pairing validation, and `approveEscalation`'s ordered fail-closed sequence (non-widening, no-approval, no-agent, each outcome), plus `writableRoots`/`canonicalPath`. `dsh-sandbox-policy` pins the default accessors, the fold/setter, the load-time mode rejection, and HMR safety. `dsh-fs-sandbox` pins the per-mode fence and the containment matrix (inside, temp area, absolute-outside, `..`, symlinked-out directory, new file under one, path-equals-root, filesystem-root, and alias-equivalent spelling) on a real filesystem, plus the per-call override and HMR safety. `dsh-tool-fs` pins advertisement gating, the mode stamp, the fold, denial-marker mapping, and the full escalation matrix (grant, reject, no-service, no-agent, pairing, non-confining guard). `dsh-tool-bash`, `dsh-bash-sandbox`, and `dsh-permission` migrate to the relocated policy/kit.
 - Snapshot: the acp-agent example composes `dsh-sandbox-policy` + `dsh-fs-sandbox`; the pinned header carries the fs escalation fields and the `sandbox/mode` event name, re-recorded once.

.agents/notes/implemented/feature/2026-07-14-cross-family-fs-sandbox.zh.md

@@ -31,7 +31,7 @@ Status: implemented
 `packages/fs/fs-sandbox/`(`@deepseek-ai/dsh-fs-sandbox`)镜像 `bash-local`/`bash-sandbox` 的拆分:`SandboxedFileSystem extends LocalFileSystem`,注册为 `ctx.fs`,注入 `sandboxPolicy`。读取(`resolve`/`stat`/`readText`/`streamText`/`listDir`)原样透传——每种模式都允许读。两个变更操作在委托给继承来的原子写之前按模式执行:
 
 - `read-only` 直接拒绝 `writeText`/`editText`。
-- `workspace-write` 把规范化后的目标围栏于可写根集合——`dsh-sandbox` 中的 `writableRoots(policy)`:工作区根加上平台临时目录(`/tmp`、`os.tmpdir()`),各自 realpath——与 Seatbelt profile 授予的是同一个集合,所以 fs 围栏是这一个模式含义在 bwrap/Landlock/Seatbelt profile 之外的第四种方言,因此不会出现「write 工具不能写 `/tmp` 而 bash 能」的不对称。包含判定是对真实路径的前缀包含;目标在委托前被立即重新规范化(`resolve` 对最深的既有祖先做 realpath),因此自工具解析该目标以来被换出的祖先符号链接会被捕获。
+- `workspace-write` 把规范化后的目标围栏于可写根集合——`dsh-sandbox` 中的 `writableRoots(policy)`:工作区根加上平台临时目录(`/tmp`、`os.tmpdir()`),各自 realpath——与 Seatbelt profile 授予的是同一个集合,所以 fs 围栏是这一个模式含义在 bwrap/Landlock/Seatbelt profile 之外的第四种方言,因此不会出现「write 工具不能写 `/tmp` 而 bash 能」的不对称。规范化路径写法采用词法包含的快速路径；当 Windows 以大小写不同的路径、长文件名或 8.3 短文件名表示同一目录时，系统会逐级遍历祖先目录并比较文件系统身份，而不会把边界弱化为依据文本前缀猜测包含关系。目标在委托前被立即重新规范化(`resolve` 对最深的既有祖先做 realpath),因此自工具解析该目标以来被换出的祖先符号链接会被捕获。
 - `danger-full-access` 不加围栏地委托。
 
 拒绝是结构化的 `FS_SANDBOX_DENIED`,携带生效模式——区别于 `FS_PERMISSION_DENIED`(宿主 EACCES 是世界在拒绝;这里是策略在拒绝)。无文本推断:进程内围栏确切知道它拒绝了什么。per-call 载体是 `writeText`/`editText` 上一个末尾可选的 `sandboxMode`(文件系统侧对应 `BashExecRequest.sandboxMode`);该 seam 保持无会话依赖(由调用方盖章,正如 `resolve` 接收一个 cwd),而裸的本地后端携带并忽略它。`FileSystem.sandboxMode` 是能力事实(在基类与 `fs-local` 上为 `undefined`,在 `SandboxedFileSystem` 上为默认值),所以工具层按组合真相来宣告升级。
@@ -74,7 +74,7 @@ Status: implemented
 已交付的部分——§ Testing 的各层各自钉住:
 
 - 在 `read-only` 下,`write`/`edit` 返回 `[sandbox: file access denied under read-only mode]` 标记,磁盘不受触动;`read`/`listDir` 与 `dsh-fs-local` 行为一致。
-- 在 `workspace-write` 下,变更落在工作区根与临时目录下,其外被拒;包含矩阵——`..` 穿越、指向外部的绝对路径、一个既有的、指向外部的工作区内符号链接目录,以及在这样一个符号链接下新建的文件——在真实磁盘上拒绝每一种逃逸。
+- 在 `workspace-write` 下,变更落在工作区根与临时目录下,其外被拒;包含矩阵——`..` 穿越、指向外部的绝对路径、一个既有的、指向外部的工作区内符号链接目录、在这样一个符号链接下新建的文件,以及根路径的等价别名形式——在真实磁盘上拒绝每一种逃逸,同时允许文件系统认定为同一目录的路径。
 - 一个被拒的 fs 变更,携带 `sandbox_permissions` + `justification` 重试一次,会经组合的审批链提示;一次授权让恰好那一次调用在更宽的模式下运行且写入落盘;rejected/cancelled/unavailable 各自产生其逐字的 fail-closed 文案且不做任何变更。
 - 一次 `permission` 预设切换同时管辖两个家族:会话切换模式后,下一次 bash 调用与下一次 fs 变更都从同一个 `sandbox/mode` 折叠遵循新模式。
 - 一次无 per-call 盖章的直连 `ctx.fs.writeText` 会被围栏于部署默认值。
@@ -90,5 +90,5 @@ Status: implemented
 
 ## Testing
 
-- 单元:`dsh-sandbox` 钉住升级阶梯、标记构造器、参数配对校验,以及 `approveEscalation` 的有序 fail-closed 序列(非加宽、无 approval、无 agent、各结果),外加 `writableRoots`/`canonicalPath`。`dsh-sandbox-policy` 钉住默认访问器、折叠/setter、加载期模式拒绝,以及 HMR 安全。`dsh-fs-sandbox` 在真实文件系统上钉住 per-mode 围栏与包含矩阵(内部、临时目录、绝对路径-外部、`..`、指向外部的符号链接目录、其下的新建文件、路径等于根、以分隔符结尾的根),外加 per-call 覆盖与 HMR 安全。`dsh-tool-fs` 钉住宣告门控、模式盖章、折叠、拒绝标记映射,以及完整的升级矩阵(授权、拒绝、无服务、无 agent、配对、非受限守卫)。`dsh-tool-bash`、`dsh-bash-sandbox` 与 `dsh-permission` 迁移到迁移后的策略/工具集。
+- 单元:`dsh-sandbox` 钉住升级阶梯、标记构造器、参数配对校验,以及 `approveEscalation` 的有序 fail-closed 序列(非加宽、无 approval、无 agent、各结果),外加 `writableRoots`/`canonicalPath`。`dsh-sandbox-policy` 钉住默认访问器、折叠/setter、加载期模式拒绝,以及 HMR 安全。`dsh-fs-sandbox` 在真实文件系统上钉住 per-mode 围栏与包含矩阵(内部、临时目录、绝对路径-外部、`..`、指向外部的符号链接目录、其下的新建文件、路径等于根、文件系统根、等价别名形式),外加 per-call 覆盖与 HMR 安全。`dsh-tool-fs` 钉住宣告门控、模式盖章、折叠、拒绝标记映射,以及完整的升级矩阵(授权、拒绝、无服务、无 agent、配对、非受限守卫)。`dsh-tool-bash`、`dsh-bash-sandbox` 与 `dsh-permission` 迁移到迁移后的策略/工具集。
 - 快照:acp-agent 示例组合 `dsh-sandbox-policy` + `dsh-fs-sandbox`;被钉住的 header 携带 fs 升级字段与 `sandbox/mode` 事件名,一次性重录。

.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.i18n.yaml

@@ -0,0 +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
+2026-07-21-log-backed-session-titles.md: cd0d2a4bab9b6504c65e942c0e03bce79488364e
+2026-07-21-log-backed-session-titles.zh.md: b90ac6c59677e6542733210b91de38ef1169c760

.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md

@@ -0,0 +1,60 @@
+# Agent Note: Log-backed session titles
+
+Status: implemented
+
+English | [中文](2026-07-21-log-backed-session-titles.zh.md)
+
+## Problem
+
+A session needs a short human-facing title before an editor, terminal, or query consumer can present it usefully. The cheapest implementation can derive one from the first prompt, while higher-quality implementations may call a model over the first prompt or the whole conversation. Those strategies have different latency, cost, routing, and retry behavior, but every consumer needs one durable source of truth.
+
+Session identity metadata is immutable, the event log is the replay and fork boundary, and every event must remain turn-enclosed. A model-generated title often finishes after the main turn closes, so writing it synchronously would delay the agent response while writing it as mutable metadata would bypass ordinary persistence, replay, and lineage semantics. Concurrent prompts, provider HMR, cancellation, and ignored abort signals also make an unfenced background result capable of overwriting a newer title.
+
+## Decision
+
+The [`session-title` capability family](../../../../packages/session-title/README.md) owns title state and generation policy. `@deepseek-ai/dsh-session-title` provides `ctx.sessionTitle`, a deterministic first-message fallback, and a registry for at most one optional asynchronous provider. `@deepseek-ai/dsh-session-title-llm` owns the common auxiliary-model request policy; separate first-message and all-user-messages plugins choose input cadence. The shared agent spine mounts only the fallback service with overridable explicit example limits, leaving both model providers opt-in.
+
+### Event ownership and folding
+
+Every accepted revision is a log-only `session/title` event. Its payload contains normalized non-empty text, the exact eligible human `user/message` seqs used to derive it, and either fallback provenance or the registered provider id plus optional provider/model route. Before an auxiliary title-model dispatch, the shared helper appends a log-only `session/title-llm-request` event containing the title-provider id, exact source seqs, route, system prompt, messages, and output-token cap; a later generation failure leaves the request auditable. The dispatched envelope is deep-frozen to preserve exact agreement with that record but carries no process-local agent-loop request identity, so loop-only reconstruction checks do not compare it with the main conversation header. Validation failures that never reach dispatch create no request event. `foldSessionTitle()` selects the latest title event and adds that event's seq and timestamp as `SessionTitleSnapshot`. Neither event enters `session.surface` or `deriveMessages()`.
+
+The core session package exposes `ctx.sessions.appendOutOfBand()` only for plugin event types whose owners also declaration-merge an `OutOfBandSessionEventMap` marker. An open turn receives the log-only event directly and owns its normal checkpoint. A closed log receives `turn/start → event → turn/end` under the plugin's trigger, followed by an awaited flush. Once the synthetic turn opens, target-append failure still attempts to close and flush it; detach is deferred until the sequence settles. Session titles contribute the source-free `session-title` zero-step trigger and opt both title event types into this seam. No message caused that trigger, so consumers of the merge-extensible `TurnTriggerMap` discriminate `kind` before reading variant fields; goal-round admission, for example, ignores every non-`message` trigger.
+
+### Input and asynchronous timing
+
+Only text blocks from human-source `user/message` events are eligible. Empty, control-only, and non-text prompts wait for the next eligible message. The service schedules the first fallback without awaiting it from the prompt path, normalizes whitespace and control sequences, applies the configured word and UTF-8 byte limits without splitting a code point, and records the first message seq.
+
+Automatic provider work starts only after the main loop has a current logged provider/model route. A newly appended `request/header` starts pending work directly; when the header is unchanged, the marked loop-built `llm/stream` request starts it after matching the folded route. Generation then runs independently of the agent response, and a completion joins whichever turn is open at acceptance time or uses the zero-step append path. Explicit `refresh(session, signal?)` materializes any missing fallback and awaits the registered provider; without a provider it returns the fallback. Caller cancellation during fallback flush does not roll back the durable append, but `refresh()` rechecks the signal and rejects instead of returning success. Concurrent refreshes reserve their session-local revision before waiting for fallback durability, so a newer call supersedes an older call before either can invert provider completion order. Automatic work and concurrent refreshes share one session-local in-flight fallback promise, so the first fallback creates only one title event and zero-step turn. All title-capability out-of-band writes share a per-session settlement queue; a replacement model request waits for any earlier title write, while the superseded model call itself remains independently abortable and cannot commit stale output. A title accepted during asynchronous compaction remains log-only, so the compactor's post-summary surface-node check tolerates it; a concurrent surface mutation still invalidates the replacement.
+
+The first-message provider schedules once when a fresh session first creates its fallback. An automatic failure does not reschedule on later prompts; `refresh()` is the retry path. The all-messages provider schedules after every eligible human prompt and passes all eligible messages through that revision, including seeded history. Its newer revision aborts and supersedes older pending or active work.
+
+### Registration, routing, and failure policy
+
+`register(provider)` validates one branded stable id, cadence, and generation function, then returns an awaitable effect disposer. A second live registration throws immediately. Provider disposal marks the registration closing, aborts its pending and active work, and waits for every call to settle before removing the registration, so replacement cannot overlap a provider that ignores cancellation. Session disposal aborts its active work. Service teardown prevents queued fallback and provider microtasks from starting, aborts active work, and drains tracked promises before unloading completes. Every session-local generation has a monotonic revision and exact registration identity; acceptance rechecks revision, registration, session liveness, service liveness, and cancellation, so stale output cannot commit.
+
+Model providers require explicit word, CJK-character, input-byte, output-token, and timeout limits. Optional `provider` and `model` overrides are a pair; without them the helper uses the exact route from the logged main request header. Selected messages are framed as JSON under one fixed language-aware instruction. The input limit measures that final user prompt, including wrappers, seq fields, and JSON escaping, before the request is logged or dispatched. Oversized input is rejected rather than truncated because truncation would make the recorded source seqs falsely imply complete use. The fused deadline is checked while consuming each stream chunk and after completion, so a successful result returned after timeout cannot be accepted even when an interceptor or adapter ignores abort.
+
+Automatic provider failures are nonfatal warnings and retain the latest title. Explicit refresh failures reject to the caller. Output must be non-empty text with unique ordered seqs drawn from the fixed request; the service normalizes and byte-limits it before durable acceptance.
+
+### Forks and consumers
+
+A fork inherits seed title events unchanged, like the rest of its source log. The first-message provider does not automatically retitle a fork. The all-messages provider may append a child-owned revision after a later child prompt, using inherited and new eligible messages.
+
+`ctx.sessionQuery.readTitle()` folds one live-preferred or persisted log without loading titles during `listSessions()`. ACP maps the event to `session_info_update` during both live streaming and load replay, using the event timestamp for `updatedAt`. The TUI uses the latest title as its header subtitle and sets the terminal window title to `<session title> — <configured product title>` after terminal-safe rendering. A synthetic title turn remains a completed durability boundary for the metadata write; consumers reporting agent completion use the core `findLastMessageTurnEnd()` fold so a later title, injection, or other plugin-owned turn cannot replace the preceding message-triggered outcome.
+
+## Alternatives considered
+
+- **Mutable `SessionHeader` or side metadata** — rejected because it creates a second persistence mutation protocol, weakens immutable identity metadata, makes crash atomicity backend-specific, and gives forks ambiguous copy-versus-reference behavior. The append-only log already owns replayable latest-wins state.
+- **Await title generation before returning the agent response** — rejected because auxiliary provider latency and failure would sit on the main interaction's critical path. The deterministic fallback gives immediate useful state while a better title may arrive later.
+- **Put titles in derived history or the request prefix** — rejected because UI metadata would consume tokens, change cache identity, and make the main model observe its own label. A log-only event remains reconstructable without becoming model-visible.
+- **Permit multiple registered providers and resolve precedence after completion** — rejected because completion order is not product precedence and would make retries, HMR, and provenance nondeterministic. A deployment that needs a composite policy can register one provider that owns that policy.
+- **Silently truncate oversized auxiliary input** — rejected because the provider result would claim exact source-message provenance while receiving only partial text. Keeping the prior title and warning preserves truthful attribution.
+- **Index titles in `listSessions()` immediately** — rejected because the existing lightweight metadata list would need per-backend derived-index synchronization. Exact `readTitle()` establishes the read contract without precommitting search or indexing policy.
+
+## Consequences
+
+- Titles survive JSONL and SQLite persistence, replay through ACP, and follow fork inheritance without a separate mutable record.
+- A fallback appears without an auxiliary call; deployments choose whether better titles justify model cost and whether later prompts should retitle a session.
+- Auxiliary request records and late accepted titles consume event seqs and may create balanced zero-step turns, so persistence exposes both attempted dispatches and accepted updates even though model history and KV-cache identity do not change.
+- One provider and monotonic per-session revisions make disposal, supersession, and stale-result rejection explicit, at the cost of leaving multi-strategy precedence to a composite provider.
+- Manual rename, deletion, generated-versus-user precedence, search, and list indexing remain outside the capability.

.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.zh.md

@@ -0,0 +1,60 @@
+# Agent Note: 基于日志的会话标题
+
+Status: implemented
+
+[English](2026-07-21-log-backed-session-titles.md) | 中文
+
+## 问题
+
+会话需要一个面向用户的简短标题，编辑器、终端或查询消费方才能有效呈现它。成本最低的实现可以从第一条提示词派生标题，质量更高的实现则可以让模型处理第一条提示词或整个对话。这些策略在延迟、成本、路由和重试行为上各有不同，但所有消费方都需要一个持久的真源。
+
+会话身份元数据不可变，事件日志是回放和 fork 的边界，而且每个事件都必须包围在轮次内。模型生成的标题往往在主轮次结束后才完成，因此同步写入会延迟 agent（智能体）响应，而作为可变元数据写入则会绕过常规的持久化、回放和沿袭语义。并发提示词、提供方 HMR（热模块替换）、取消以及被忽略的中止信号，还可能让未受版本校验约束的后台结果覆盖更新的标题。
+
+## 决策
+
+[`session-title` 功能包族](../../../../packages/session-title/README.md)负责标题状态和生成策略。`@deepseek-ai/dsh-session-title` 提供 `ctx.sessionTitle`、确定性的首消息回退方案，以及一个至多接受单个可选异步提供方的注册表。`@deepseek-ai/dsh-session-title-llm` 负责通用的辅助模型请求策略；首消息插件和全部用户消息插件分别选择输入调度方式。共享 agent 主干只挂载回退服务，并为其显式设置可覆盖的示例限制；两种模型提供方均需按需启用。
+
+### 事件归属与折叠
+
+每个已接受的修订都是纯日志 `session/title` 事件。其载荷包含规范化后的非空文本、用于派生标题的所有合格且来源为人类的 `user/message` 的准确 seq，以及回退来源信息，或已注册的提供方 id 加可选的提供方和模型路由。辅助标题模型发起调用前，共享辅助组件会追加一个纯日志 `session/title-llm-request` 事件，其载荷包含标题提供方 id、准确的源 seq、路由、系统提示词、消息和输出 token 上限；即使后续生成失败，这次请求仍可审计。发送的请求信封经过深度冻结，以确保其与该记录精确一致，但它有意不携带进程本地的 agent loop（智能体循环）请求身份，因此仅针对 agent loop 的重建检查不会将它与主对话请求头进行比较。未进入调用阶段的验证失败不会创建请求事件。`foldSessionTitle()` 选择最新的标题事件，并将该事件的 seq 和时间戳加入 `SessionTitleSnapshot`。这两类事件都不会进入 `session.surface` 或 `deriveMessages()`。
+
+核心会话包通过 `ctx.sessions.appendOutOfBand()` 暴露这一接口，但只允许所属插件同时通过声明合并向 `OutOfBandSessionEventMap` 添加标记的插件事件类型使用。开放轮次会直接接收纯日志事件，并负责其常规检查点。已关闭的日志会在该插件的触发器下接收 `turn/start → event → turn/end`，随后等待刷写完成。合成轮次一旦开启，即使目标追加失败，系统仍会尝试将其关闭并刷写；整个序列完成前会延迟 detach。会话标题提供不带消息来源的 `session-title` 零步骤触发器，并让这两类标题事件都使用这一服务边界。该触发器并非由消息引起，因此可合并扩展的 `TurnTriggerMap` 的消费方在读取变体字段前，会先根据 `kind` 判别类型；例如，目标轮次准入会忽略所有非 `message` 触发器。
+
+### 输入与异步时序
+
+只有人类来源的 `user/message` 事件中的文本块才符合条件。空提示词、仅含控制字符的提示词和非文本提示词会等待下一条合格消息。服务从提示词路径调度首个回退标题而不等待其完成，随后规范化空白和控制序列，应用已配置的单词数和 UTF-8 字节限制且不拆分代码点，并记录第一条消息的 seq。
+
+仅当主循环存在已记录在日志中的当前提供方/模型路由时，自动提供方工作才会启动。`request/header` 新追加到日志时，会直接启动待执行工作；如果请求头没有变化，则由循环构建并带有标记的 `llm/stream` 请求会先与折叠所得的路由匹配，再启动该工作。随后，生成工作独立于 agent 响应运行；完成结果在被接受时加入当时开放的轮次，否则使用零步骤追加路径。显式调用 `refresh(session, signal?)` 会生成尚缺的回退标题并等待已注册的提供方；没有提供方时则返回回退标题。调用方在回退标题刷写期间取消调用不会回滚这次持久化追加，但 `refresh()` 会重新检查取消信号，并让调用以拒绝结束，而非返回成功。并发刷新会在等待回退标题持久化完成前预留会话本地修订号，因此在任何调用有机会造成提供方完成顺序倒置之前，较新的调用就会取代较早的调用。自动工作与并发刷新在每个会话内共用同一个进行中的回退 promise，因此首次回退只会创建一个标题事件和一个零步骤轮次。会话标题功能产生的所有带外写入在每个会话内共用一个结算队列；接替执行的模型请求会等待任何更早的标题写入完成，而被取代的模型调用本身仍可独立中止，且无法提交陈旧输出。异步压缩（compaction）期间接受的标题仍是纯日志事件，因此压缩器在摘要完成后执行的表层节点检查不会因该标题而失败；并发的表层变更仍会使替换失效。
+
+首消息提供方仅在新会话首次创建回退标题时调度一次。自动执行失败后，后续提示词不会重新调度；`refresh()` 是重试路径。全部消息提供方会在每条合格且由人类发出的提示词后调度，并传入截至该修订的所有合格消息，包括预置历史记录。较新的修订会中止并取代更早的待执行或活跃工作。
+
+### 注册、路由与失败策略
+
+`register(provider)` 会验证一个带品牌类型的稳定 id、执行时机和生成函数，然后返回一个可等待完成的 effect 资源释放函数。第二个活跃注册会立即抛出错误。提供方执行资源释放时，会将注册标记为正在关闭，中止其待执行和活跃工作，并等待所有调用结束后才移除注册，因此替代提供方不会与忽略取消的旧提供方重叠运行。会话资源释放会中止其活跃工作。服务卸载时，会阻止排队中的回退和提供方微任务启动，中止活跃工作，并且卸载完成前会等待所有已跟踪的 promise 结算。每项会话本地生成都有单调递增的修订号和对应的注册身份；接受结果时会重新检查修订号、注册、会话活跃状态、服务活跃状态和取消状态，因此陈旧输出无法提交。
+
+模型提供方必须显式配置单词数、CJK 字符数、输入字节数、输出 token 数和超时限制。可选的 `provider` 和 `model` 覆盖项必须成对提供；两者均未提供时，辅助组件会使用主请求已记录请求头中的准确路由。系统在一条固定且能区分语言的指令下，将选中的消息封装为 JSON。输入字节数按最终形成的用户提示词计算，其中包括包装文本、seq 字段和 JSON 转义；系统会在记录请求或发起调用前完成这项检查。过大输入会被拒绝而不是截断，因为截断会让记录的源消息 seq 错误地表示这些消息已被完整使用。系统在消费每个流分片时以及流完成后都会检查融合后的截止时间，因此即使拦截器或适配器忽略中止信号，超时后返回的成功结果也不会被接受。
+
+自动提供方故障只会发出非致命警告，并保留最新标题。显式刷新失败则会向调用方返回拒绝。输出必须是非空文本，并包含来自固定请求、唯一且有序的 seq；服务会在持久接受前对其进行规范化并施加字节限制。
+
+### Fork 与消费方
+
+与源日志的其他部分相同，fork 会原样继承作为种子的标题事件。首消息提供方不会自动为 fork 重新生成标题。全部消息提供方可以在子会话出现后续提示词后追加一项归子会话所有的修订，并使用继承的合格消息和新增的合格消息。
+
+`ctx.sessionQuery.readTitle()` 会折叠一份实时优先或已持久化的日志，而不会在 `listSessions()` 期间加载标题。ACP（Agent Client Protocol）会在实时流式输出和加载回放期间把该事件映射到 `session_info_update`，并使用事件时间戳作为 `updatedAt`。TUI 使用最新标题作为其标题栏副标题，并在完成终端安全渲染后，将终端窗口标题设置为 `<session title> — <configured product title>`。合成标题轮次本身仍会完成，并作为元数据写入的持久性边界；报告 agent 完成情况的消费方使用核心的 `findLastMessageTurnEnd()` 折叠逻辑，因此后续的标题轮次、注入轮次或其他归插件所有的轮次无法取代此前由消息触发的结果。
+
+## 考虑过的替代方案
+
+- **可变 `SessionHeader` 或独立元数据**：不予采纳，因为这会创建第二套持久化变更协议，削弱不可变身份元数据，让崩溃原子性因后端而异，并使 fork 的复制或引用行为产生歧义。仅追加日志已经负责可回放的后写覆盖状态。
+- **返回 agent 响应前等待标题生成**：不予采纳，因为辅助提供方的延迟和故障会进入主交互的关键路径。确定性回退方案可以立即提供可用状态，质量更高的标题则可稍后到达。
+- **将标题放入派生历史记录或请求前缀**：不予采纳，因为 UI 元数据会消耗 token、改变缓存标识，并让主模型观察到自己的标签。纯日志事件既保持可重建，又不会变得对模型可见。
+- **允许注册多个提供方，并在完成后解析优先级**：不予采纳，因为完成顺序并不等于产品优先级，而且会让重试、HMR 和来源信息变得不确定。需要组合策略的部署可以注册一个自行负责该策略的提供方。
+- **静默截断过大的辅助输入**：不予采纳，因为提供方结果会声明准确的源消息来源信息，实际却只接收了部分文本。保留原有标题并发出警告，可以保持归因真实。
+- **立即在 `listSessions()` 中索引标题**：不予采纳，因为现有的轻量元数据列表将需要逐后端同步派生索引。精确的 `readTitle()` 建立了读取契约，而没有提前锁定搜索或索引策略。
+
+## 后果
+
+- 标题可以在 JSONL 和 SQLite 持久化中存续，通过 ACP 回放，并遵循 fork 继承语义，而无需单独的可变记录。
+- 回退标题无需辅助调用即可出现；部署方可以自行决定更优标题是否值得模型成本，以及后续提示词是否需要重新生成会话标题。
+- 辅助请求记录和延迟接受的标题会占用事件 seq，并可能创建平衡的零步骤轮次，因此持久化会同时呈现尝试发起的调用与已接受的更新，尽管模型历史和 KV 缓存标识保持不变。
+- 单个提供方和每会话单调递增的修订号让释放、取代和陈旧结果拒绝行为明确可见，但多策略优先级必须由复合提供方负责。
+- 手动重命名、删除、生成标题与用户标题的优先级、搜索和列表索引不在此功能范围内。

.github/AGENTS.md

@@ -0,0 +1,3 @@
+# AGENTS.md — GitHub Actions
+
+Run Windows jobs under native `pwsh`.

.github/workflows/ci.yml

@@ -182,11 +182,9 @@ jobs:
       - name: Build (tsc -b + tsdown)
         run: pnpm run build
 
-  # Observational, non-blocking Windows static, lint, and artifact lanes. Coverage
+  # Observational, non-blocking Windows mirror of the Linux gate lanes. Run the
-  # and snapshot stay Linux-only until their platform-specific runtime failures
+  # gates from native PowerShell: an MSYS parent would change the environment
-  # have dedicated support. Run the gates from native PowerShell: an MSYS parent
+  # being measured. This job intentionally stays out of all-checks-passed.needs.
-  # would change the environment being measured. This job intentionally stays
-  # out of all-checks-passed.needs.
   windows-gates:
     continue-on-error: true
     runs-on: windows-2025
@@ -194,6 +192,7 @@ jobs:
     env:
       DSH_GATE_CONCURRENCY: ${{ matrix.gate_concurrency }}
       DSH_PUBLINT_CONCURRENCY: ${{ matrix.publint_concurrency }}
+      DSH_COVERAGE_MAX_WORKERS: ${{ matrix.coverage_max_workers }}
       DSH_ESLINT_CACHE: ${{ matrix.eslint_cache }}
     strategy:
       fail-fast: false
@@ -203,16 +202,31 @@ jobs:
             command: pnpm run check:ci:static
             gate_concurrency: '4'
             publint_concurrency: '8'
+            coverage_max_workers: ''
             eslint_cache: ''
           - lane: lint
             command: pnpm run check:ci:lint
             gate_concurrency: '1'
             publint_concurrency: '8'
+            coverage_max_workers: ''
             eslint_cache: '1'
+          - lane: coverage
+            command: pnpm run check:ci:coverage
+            gate_concurrency: '1'
+            publint_concurrency: '8'
+            coverage_max_workers: '4'
+            eslint_cache: ''
+          - lane: snapshot
+            command: pnpm run check:ci:snapshot
+            gate_concurrency: '1'
+            publint_concurrency: '8'
+            coverage_max_workers: ''
+            eslint_cache: ''
           - lane: artifacts
             command: pnpm run check:ci:artifacts
             gate_concurrency: '3'
             publint_concurrency: '8'
+            coverage_max_workers: ''
             eslint_cache: ''
     steps:
       - uses: actions/checkout@v6

docs/architecture.i18n.yaml

@@ -0,0 +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
+architecture.md: b3e2db14727c299562f9b061459547d147ec1d70
+architecture.zh.md: 6fd2a7e161a10ac5f2dcee6859b0d6251671676f

docs/architecture.md

@@ -1,12 +1,14 @@
 # DeepSeek Harness Architecture
 
-The **DeepSeek Harness SDK** builds on Cordis: **everything is a plugin**, including the shipped loop.
+English | [中文](architecture.zh.md)
+
+**DeepSeek Harness SDK** uses Cordis: **everything is a plugin**, including the loop.
 
 ## Overview
 
-Harnesses are [Cordis](cordis-primer.md) contexts whose packages contribute disposable services, events, and registrations.
+Harnesses are [Cordis](cordis-primer.md) contexts whose packages contribute services, typed events, and disposable registrations.
 
-`packages/core/` groups the default agent flow.
+`packages/core/` groups the default agent flow; capabilities remain plugins.
 
 ### Default Services
 
@@ -40,6 +42,7 @@ Harnesses are [Cordis](cordis-primer.md) contexts whose packages contribute disp
 | `ctx.goals` | [`goal/`](../packages/goal/README.md) | persisted same-session goals |
 | `ctx.sessionPersistence` | [`session-persistence/`](../packages/session-persistence/README.md) | durable storage for session logs |
 | `ctx.sessionQuery` | [`session-query/`](../packages/session-query/README.md) | live-preferred logical-corpus exact reads and relationship traces |
+| `ctx.sessionTitle` | [`session-title/`](../packages/session-title/README.md) | log-backed fallback titles and one optional asynchronous provider |
 | `ctx.invariants` | [`support/invariants`](../packages/support/invariants/README.md) | registry and package-name selection for package-owned runtime checks |
 
 ## Event
@@ -48,9 +51,9 @@ Events form the service extension API; see the exhaustive [events catalog](cordi
 
 ### Event Domains
 
-- **Session events** are durable, replayable facts: boundaries, messages, tool activity, steering, compaction, and tool-owned records append to the log and flow through `session/event`.
+- **Session events** are durable facts appended to the log and emitted through `session/event`.
-- **Agent events** carry the live `Agent` handle for status, diagnostics, prompt admission, request shaping, result validation, and continuation policy.
+- **Agent events** carry the live `Agent` for status, prompt admission, request shaping, validation, and continuation.
-- **Capability events** belong to their owning seam; `tools/*`, `llm/*`, `system-prompt/*`, `fs/*`, and `subagent/*` attach policy and adapters without importing the loop.
+- **Capability events** let owning seams attach policy and adapters without importing the loop.
 
 ### Interception Semantics
 
@@ -60,9 +63,9 @@ Waterfall events behave like around-middleware: a listener delegates by calling
 
 The shipped loop drains prompt-to-checkpoint work through plugin-visible services and events.
 
-A **session** is an append-only log. Each ordinary **turn** claims one queued `send()` item; injection claims none. A claimed `send()` successor awaits the preceding claimed ordinary turn's checkpoint but may share its `running` interval ([decision](../.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md)). A turn ends when model and plugins stop it. A **step** is one model request plus tools. Below ([sequence companion](agent-lifecycle.md)), quotes mark durable events; other names are extension points.
+A **session** is append-only. Each ordinary **turn** claims one queued `send()` item; injection claims none. A successor awaits the preceding claimed turn's checkpoint but may share its `running` interval ([decision](../.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md)). A turn ends when model and plugins stop it; a **step** is one model request plus tools. In the [sequence below](agent-lifecycle.md), quotes mark durable events.
 
-No id mints `<config-id>-session-<uuid>`; `sessionId` resumes/creates; `resumeSessionId` needs history. Resume restores lineage, seeds, and delegation depth pre-publication. Failures emit `agent-loop/config-start-failed(sessionId, error)`; front doors reject; teardown stays silent.
+Without an id, creation mints `<config-id>-session-<uuid>`; `sessionId` resumes or creates, while `resumeSessionId` requires history. Resume restores lineage and delegation depth before publication. Setup failures emit `agent-loop/config-start-failed`; teardown is silent.
 
 ### Turn Flow
 
@@ -110,9 +113,9 @@ forever:
     checkpoint persistence and notify idle/running status
 ```
 
-Each step assembles ordered prompt sections, tool schemas, and `{{name}}` variables; unknown or valueless references fail the turn. `dsh-system-prompt` owns the harness identity and default persona, which an agent scope may shadow. The loop supplies `model` and `cwd` ([prompt ownership](../.agents/notes/implemented/architecture/2026-07-05-prompt-variables-and-tool-guidance-ownership.md)).
+Each step assembles ordered prompt sections, tool schemas, and variables; unknown references fail the turn. `dsh-system-prompt` owns identity and persona, while the loop supplies `model` and `cwd` ([prompt ownership](../.agents/notes/implemented/architecture/2026-07-05-prompt-variables-and-tool-guidance-ownership.md)).
 
-Tool-time context—including async `agent.inject()` notices and post-tool `additionalContexts`—settles after results. Steering drains; before signal closure, `agent/post-step` observes durable output, results, context, and steering. Leftovers queue. Terminal `agent/turn-stop` runs after continuation and steering folding, remains authoritative through close/flush, and discards later steering while preserving queued prompts.
+Tool-time context—including async `inject()` and post-tool `additionalContexts`—settles after results. Steering drains before `agent/post-step`, which sees durable output, results, context, and steering. Leftovers queue. Terminal `agent/turn-stop` remains authoritative through close/flush; later steering is discarded while queued prompts remain.
 
 Pruning precedes summaries; overflow retries require durable progress. Bounded transient retries compose on `agent/request-error`; cancellation wins ([compaction](../.agents/notes/implemented/architecture/2026-07-10-after-call-compaction-pressure-and-overflow-recovery.md), [retry](../.agents/notes/implemented/architecture/2026-06-21-bounded-llm-request-recovery.md)).
 
@@ -120,33 +123,35 @@ Pruning precedes summaries; overflow retries require durable progress. Bounded t
 
 The turn contains failures. Adapter failures close the step before `agent/request-error`, which receives exact `Error`, `LlmFailure`, and history. Retry opens another step; success clears history; exhaustion stores failure on `turn/end`. Failed chunks commit no message/tool.
 
-Other failures use `agent/error`. Cancellation and disposal beat recovery; undispatched model tool calls get synthetic `tool/call`/`ABORTED_BEFORE_DISPATCH` pairs. One turn signal retires before `turn/end`. Effective `cancel()` emits its typed `user | parent` cause before clearing queues and aborting; observers cannot veto, idle calls emit nothing, and durability records only `aborted`. Disposal awaits quiescence before unregistering ([decision](../.agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.md)).
+Other failures use `agent/error`. Cancellation and disposal beat recovery; undispatched tool calls get synthetic `tool/call`/`ABORTED_BEFORE_DISPATCH` pairs. The turn signal retires before `turn/end`. Effective `cancel()` emits its typed cause before clearing queues and aborting; observers cannot veto, idle calls emit nothing, and durability records `aborted`. Disposal awaits quiescence ([decision](../.agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.md)).
 
 Every session event is turn-enclosed. Reloading preserves an interrupted tail and closes it with a synthetic `interrupted` turn end. Failures after durable turn close report only through `agent/error` because no safe in-turn position remains. Each turn has one `TurnEndReason`; [TurnEndReasonMap](core-data-structures/session.md#why-a-turn-ended-turnendreasonmap) owns the variants.
 
 ### Agent Handles
 
-`ctx.agents` owns live agents and returns `AgentHandle { agent, dispose() }`. Plugins drive `Agent` through `send()`, `steer()`, `inject()`, `cancel()`, and `whenIdle()`. The caller fiber and factory provider structurally co-own programmatic lifecycles; the consumer handle is the only other teardown capability. All owners await one disposer.
+`ctx.agents` owns live agents and returns `AgentHandle { agent, dispose() }`. Plugins use `send()`, `steer()`, `inject()`, `cancel()`, and `whenIdle()`. The caller fiber, factory provider, and consumer handle co-own teardown through one awaited disposer.
 
 ### Agent Scope
 
-`agent.ctx` owns each live agent's scoped registrations; shared storage overlays global tool, prompt, and command entries while preserving domain views ([decision](../.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md)). Listeners match the agent; cleanup is awaited. `CreateAgentOptions.setup(agentCtx)` composes the scope before publication. Typed resolvers derive carrier checks from merged `Events` signatures and `scopeTarget` ([semantic gates](../.agents/notes/implemented/process/2026-07-14-typescript-program-backed-semantic-gates.md)). See [agent scope](../.agents/notes/implemented/architecture/2026-07-08-agent-scope-contexts.md) and [subagent composition controls](../.agents/notes/implemented/feature/2026-07-12-subagent-persona-tool-filter-and-depth.md). `AgentLoop` runs drivers inside `ctx.agents.withInitiator()`; private orchestration derives `agent.session`; turn, step, signal, cwd, and authority stay explicit ([decision](../.agents/notes/implemented/architecture/2026-07-15-agent-initiator-scope.md)).
+Each agent owns a scoped `agent.ctx`; shared storage overlays global tool, prompt, and command entries while preserving domain views ([decision](../.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md)). Scoped listeners filter dispatch, and every scoped contribution unwinds with awaited cleanup. `CreateAgentOptions.setup(agentCtx)` composes before publication. Typed resolvers derive carrier checks from merged `Events` and `scopeTarget` ([semantic gates](../.agents/notes/implemented/process/2026-07-14-typescript-program-backed-semantic-gates.md)). See [agent scope](../.agents/notes/implemented/architecture/2026-07-08-agent-scope-contexts.md) and [subagent composition](../.agents/notes/implemented/feature/2026-07-12-subagent-persona-tool-filter-and-depth.md). `AgentLoop` runs inside `ctx.agents.withInitiator()`; private orchestration derives `agent.session`, while turn, step, signal, cwd, and authority remain explicit ([decision](../.agents/notes/implemented/architecture/2026-07-15-agent-initiator-scope.md)).
 
 ## State
 
 ### Session Log
 
-The session log is the source of truth. `deriveMessages()` projects session events into the `Message[]` sent to the model; raw `assistant/chunk` events stay in the log for replay and UI fidelity. Replay, fork, resume, transcript rendering, telemetry, and persistence all derive from the same event stream.
+The session log is authoritative. `deriveMessages()` projects model history; raw `assistant/chunk` events remain for replay and UI fidelity. Fork, resume, transcript rendering, telemetry, and persistence derive from the same stream.
 
 **Model-visible ⟺ logged**: the log reconstructs every request — messages at `step/start` fronted by the header's session prefix, and headers by folding `request/header` — and the package-owned `dsh-agent-loop/invariant` can assert it through `ctx.invariants` ([reconstructability](../.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.md)).
 
 Durability is a plugin concern. Backends buffer synchronous `session/event` notifications; the loop awaits a turn-end checkpoint. `SessionPersistence` stores `SessionEvent` directly and metadata in `SessionHeader`; JSONL defaults to checksummed Zstandard, with SQLite under one contract.
 
+`ctx.sessions.appendOutOfBand()` joins 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 the agent response. Forks inherit titles ([decision](../.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md)).
+
 ### Model Content
 
-Messages contain typed blocks (`text`, `reasoning`, `tool-call`, `tool-result`) derived from merge-extensible `ContentBlockMap`; the same pattern types `MessageSource`, `FinishReason`, `TurnTrigger`, and `TurnEndReason`. New block types coordinate adapters, UI bridges, compaction pricing, token metering, and persistence as one repo-wide contract; replay measurement types live in [token-meter.md](core-data-structures/token-meter.md).
+Messages use typed blocks from merge-extensible `ContentBlockMap`; the same pattern types `MessageSource`, `FinishReason`, `TurnTrigger`, and `TurnEndReason`. New blocks coordinate adapters, UI, compaction, token metering, and persistence; replay measurements live in [token-meter.md](core-data-structures/token-meter.md).
 
-Streaming uses raw chunks and `BlockAssembler`. One `LlmAdapter.stream()` is one provider attempt; adapters report facts, while recovery policy lives on `agent/request-error`. The loop logs chunks and successful provenance/replay state. Remote adapters stop stalled transport with per-read idle watchdogs. Replay state reaches targets only when routes share an adapter instance ([contract](core-data-structures/llm-streaming.md)).
+Streaming uses raw chunks and `BlockAssembler`. Each `LlmAdapter.stream()` is one provider attempt; adapters report facts and `agent/request-error` owns recovery. The loop logs chunks and successful provenance/replay state. Remote adapters use per-read idle watchdogs. Replay state crosses routes only when they share an adapter instance ([contract](core-data-structures/llm-streaming.md)).
 
 ## Extension And Composition
 
@@ -160,7 +165,7 @@ Exceptions combine layers: LLM interface/consumer; filesystem policy; web regist
 
 ### Bundles And Apps
 
-`dsh-agent-spine-demo` bundles the default spine and an opt-in persisted-goal stack ([README](../packages/examples/agent-spine-demo/README.md)). `dsh-tui-demo` owns the interactive full-screen terminal and enables goals plus `/goal` by default; `dsh-cli-demo` runs one persisted headless turn with format-pure stdout; `dsh-acp-demo` adds stdout-pure ACP over JSON-RPC and enables the same goal and command stack ([ui/](../packages/ui/README.md)). `dsh-jsonrpc-agent` boots external `cordis.yml`; the Python SDK supplies its default only without an explicit config channel and drives `dsh-jsonrpc` over line-delimited JSON-RPC ([Python SDK](../python/README.md)). Deployments remain thin leaves with swappable backends and optional product tools ([examples/](../examples/AGENTS.md), [runnable wirings](cookbook/extension-cookbook.md#runnable-wirings), [graph atlas](graph-atlas.md)).
+`dsh-agent-spine-demo` bundles a spine and optional goals. App packages own the TUI, one-shot CLI, and ACP/JSON-RPC front doors ([README](../packages/examples/agent-spine-demo/README.md), [ui/](../packages/ui/README.md)). `dsh-jsonrpc-agent` boots external `cordis.yml`; the Python SDK supplies a default only without explicit config ([Python SDK](../python/README.md)). Thin deployments use swappable backends and optional tools ([examples/](../examples/AGENTS.md), [runnable wirings](cookbook/extension-cookbook.md#runnable-wirings), [graph atlas](graph-atlas.md)).
 
 ### Where New Behavior Goes
 
@@ -179,6 +184,7 @@ New behavior attaches to a documented extension point; a loop change updates thi
 | Add a session-stable prefix outside history | compose `agent/session-prefix`; the request header logs it |
 | Add UI or editor integration | drive `ctx.agents` and render from `session/event` |
 | Add durable session state | add a `SessionEventMap` member and render/replay from the log |
+| Add asynchronous session-title generation | register the sole provider on `ctx.sessionTitle` |
 | Manage a same-session objective | use `ctx.goals`; continue through `Agent` and `agent/*` |
 | Fork a live session | use `ctx.sessions.fork(source, boundary?, childSessionId?)` |
 | Scope a registration to one agent | use that agent's `agent.ctx` (see Agent Scope) |
@@ -188,7 +194,6 @@ The [extension cookbook](cookbook/extension-cookbook.md) carries plugin skeleton
 ## Quick Reference
 - Domain terms in the [glossary](glossary.md)
 - Type definitions in [core-data-structures/](core-data-structures/core.md)
-- Exact event and service signatures in [events](cordis-catalog/events.md)
+- Exact signatures in the [event](cordis-catalog/events.md) and [service](cordis-catalog/services.md) catalogs
-- [services](cordis-catalog/services.md) catalogs
 - package contracts in the [package map](../packages/README.md)
 - [Agent Notes](../.agents/notes/README.md)

docs/architecture.zh.md

@@ -0,0 +1,199 @@
+# DeepSeek Harness 架构
+
+[English](architecture.md) | 中文
+
+**DeepSeek Harness SDK** 使用 Cordis：**一切皆插件**，循环也不例外。
+
+## 概览
+
+每个 harness 都是一个 [Cordis](cordis-primer.md) 上下文，由各包（package）贡献服务、类型化事件和可释放的注册项。
+
+`packages/core/` 汇集默认的 agent（智能体）流程；各项功能仍以插件形式存在。
+
+### 默认服务
+
+| ctx 键 | 包 | 职责 |
+|---|---|---|
+| — | [`dsh-scope`](../packages/core/scope/README.md) | 作用域上下文注册与共享层存储（库） |
+| `ctx.sessions` | `dsh-session` | 内存中的事件溯源会话 |
+| `ctx.systemPrompt` | `dsh-system-prompt` | 有序提示词片段、工具 schema 和提示词变量 |
+| `ctx.tools` | `dsh-tools` | 工具注册表和[执行流水线](tool-execution-pipeline.md) |
+| `ctx.agents` | `dsh-agent` | 活跃 agent、委托创建、`agent/*` 事件和进程内发起方作用域 |
+| `ctx.agentLoop` | `dsh-agent-loop` | 实体 `Agent` 驱动器 |
+
+### 功能服务
+
+| ctx 键 | 包族 | 职责 |
+|---|---|---|
+| `ctx.llm` | [`llm/`](../packages/llm/README.md) | 适配器注册表和模型流式调用 |
+| `ctx.tokenMeter` | [`llm/token-meter`](../packages/llm/token-meter/README.md) | 感知回放的单实例请求压力和会话表面压力 |
+| `ctx.bash` | [`bash/`](../packages/bash/README.md) | 前台和后台命令执行 |
+| `ctx.sandbox` | [`sandbox/`](../packages/sandbox/README.md) | 同一执行环境内的进程限制（argv 包装、逐调用策略） |
+| `ctx.sandboxPolicy` | [`sandbox/`](../packages/sandbox/README.md) | 共享沙箱策略归属点 |
+| `ctx.codeRuntime` | [`code-runtime/`](../packages/code-runtime/README.md) | 执行模型编写的程序 |
+| `ctx.fs` | [`fs/`](../packages/fs/README.md) | 文件系统提供方原语和策略事件 |
+| `ctx.lsp` | [`lsp/`](../packages/lsp/README.md) | 语义导航注册表 |
+| `ctx.skills` | [`skill/`](../packages/skill/README.md) | skill（技能）提供方注册表和渐进式披露 |
+| `ctx.web` | [`web/`](../packages/web/README.md) | 搜索与抓取提供方注册表 |
+| `ctx.compact`，`ctx.toolResultPrune` | [`compact/`](../packages/compact/README.md)/[`compact-tool-result-prune`](../packages/compact/compact-tool-result-prune/README.md) | 摘要压缩（compaction）；可选的无模型结果裁剪 |
+| `ctx.subagents` | [`subagent/`](../packages/subagent/README.md) | 具名委托提供方 |
+| `ctx.tasks` | [`tasks/`](../packages/tasks/README.md) | 后台任务注册表和通用 `task_*` 控制工具 |
+| `ctx.workflows` | [`workflow/`](../packages/workflow/README.md) | 脚本驱动的多 agent 编排 |
+| `ctx.goals` | [`goal/`](../packages/goal/README.md) | 持久化的同会话目标 |
+| `ctx.sessionPersistence` | [`session-persistence/`](../packages/session-persistence/README.md) | 会话日志的持久存储 |
+| `ctx.sessionQuery` | [`session-query/`](../packages/session-query/README.md) | 实时优先的逻辑语料精确读取和关系追踪 |
+| `ctx.sessionTitle` | [`session-title/`](../packages/session-title/README.md) | 基于日志的回退标题和单个可选异步提供方 |
+| `ctx.invariants` | [`support/invariants`](../packages/support/invariants/README.md) | 按包名选择包自有运行时检查的注册表 |
+
+## 事件
+
+事件构成服务的扩展 API；完整清单见[事件目录](cordis-catalog/events.md)和[生产方与消费方映射](event-producer-consumer.md)。
+
+### 事件域
+
+- **会话事件**是追加到日志并通过 `session/event` 发出的持久事实。
+- **Agent 事件**携带活跃 `Agent`，用于状态、提示词准入、请求塑形、验证和续跑。
+- **功能事件**让所属服务边界无需导入循环即可附加策略和适配器。
+
+### 拦截语义
+
+waterfall（瀑布式事件）的行为类似环绕中间件：监听器调用 `next()` 即表示委托，直接返回而不调用它则会否决或接管。完整规则见 [Cordis waterfall 语义](cordis-primer.md#cordis-waterfall-semantics)。
+
+## 默认循环生命周期
+
+已交付的循环通过插件可见的服务和事件，持续处理从提示词到检查点的工作。
+
+**会话**采用仅追加方式。每个普通**轮次**领取一项已排队的 `send()` 输入；注入不领取输入。后续轮次会等待前一个已领取轮次的检查点，但可以与其共用同一个 `running` 区间（[决策](../.agents/notes/implemented/simplification/2026-07-17-one-send-one-turn.md)）。模型和插件停止轮次时，该轮次结束；一个**步骤**包含一次模型请求及其工具。在[下文时序](agent-lifecycle.md)中，引号标记持久事件。
+
+未提供 id 时，创建流程会生成 `<config-id>-session-<uuid>`；`sessionId` 用于恢复或创建会话，而 `resumeSessionId` 要求已有历史。恢复流程在发布前还原沿袭关系和委托深度。初始化失败会发出 `agent-loop/config-start-failed`；拆卸过程保持静默。
+
+### 轮次流程
+
+```text
+choose declarative identity and fresh/resume path
+  -> prepare private session + agent.ctx -> await unpublished setup
+  -> enter session + agent -> session/created -> agent/created
+  -> enable driving -> agent/session-start(source) -> start driver
+forever:
+  wait for a queued message
+  emit agent/status(running)
+  TURN:
+    'turn/start'
+    claimed message -> agent/prompt-submit
+      allowed prompt -> 'user/message' plus injected context
+      blocked prompt -> 'prompt/blocked' -> 'turn/end'(rejected)
+    STEP loop:
+      drain steering
+      assemble system prompt and tool schemas
+      agent/session-prefix (first step)
+      agent/pre-step
+      snapshot the derived messages (the reconstruction boundary)
+      'step/start'
+      agent/request (config only) -> log request/header -> llm/stream (frozen)
+      on final adapter-path or terminal in-band failure:
+        'step/end'
+        agent/request-error(original error, failure facts, immutable prior failures, signal)
+        retry in the next numbered step or preserve the original error
+      otherwise:
+        'assistant/chunk'
+        agent/step-result
+        'assistant/message' (transformed content or empty success anchor after step-result rejection)
+        schedule tool calls by ctx.tools.executionMode:
+          exclusive -> one-call barrier
+          parallel -> rolling pool, <= maxParallelToolCalls in flight; reclassify before start
+          each start -> 'tool/call' -> ordered tools/pre-execute -> concurrent tools/execute
+          each model-order result -> ordered tools/post-execute -> 'tool/result'
+        append accepted tool-batch context after all recorded results, then steering
+        agent/post-step
+        'step/end'
+        agent/turn-continuation
+        agent/turn-stop (terminal policy)
+        stop unless tools or continuation policy ask for another step
+    'turn/end'
+    checkpoint persistence and notify idle/running status
+```
+
+每个步骤都会组装有序提示词片段、工具 schema 和变量；未知引用会使该轮次失败。`dsh-system-prompt` 负责身份和角色设定，循环则提供 `model` 和 `cwd`（[提示词归属](../.agents/notes/implemented/architecture/2026-07-05-prompt-variables-and-tool-guidance-ownership.md)）。
+
+工具执行阶段的上下文，包括异步 `inject()` 和工具执行后的 `additionalContexts`，会在结果产生后稳定。steering（中途引导）会在 `agent/post-step` 前排空；该事件会观察持久输出、结果、上下文和 steering。余留内容进入队列。终止型 `agent/turn-stop` 在关闭和刷写期间始终具有最终决定权；后续 steering 会被丢弃，排队提示词仍予保留。
+
+裁剪先于摘要；溢出重试必须取得持久进展。有界的瞬态重试在 `agent/request-error` 上组合；取消优先（[压缩](../.agents/notes/implemented/architecture/2026-07-10-after-call-compaction-pressure-and-overflow-recovery.md)、[重试](../.agents/notes/implemented/architecture/2026-06-21-bounded-llm-request-recovery.md)）。
+
+### 失败边界
+
+轮次负责隔离故障。适配器故障会先关闭步骤，再进入 `agent/request-error`；该事件会收到准确的 `Error`、`LlmFailure` 和历史记录。重试会开启另一个步骤；成功会清除历史记录；重试耗尽后，故障存入 `turn/end`。失败分片不会提交消息或工具。
+
+其他故障使用 `agent/error`。取消和资源释放均优先于恢复；尚未分派的工具调用会得到合成的 `tool/call`/`ABORTED_BEFORE_DISPATCH` 对。轮次信号会在 `turn/end` 前失效。实际生效的 `cancel()` 会在清空队列和中止前发出类型化原因；观察方不能否决该操作，空闲状态下的调用不发出任何事件，持久化会记录 `aborted`。dispose（资源释放）会等待系统停稳（[决策](../.agents/notes/implemented/architecture/2026-07-16-explicit-turn-cancellation.md)）。
+
+每个会话事件都包围在轮次内。重新加载会保留中断的日志尾部，并用合成的 `interrupted` 轮次结束事件将其闭合。持久轮次关闭后的故障只通过 `agent/error` 报告，因为此时已没有安全的轮次内位置。每个轮次有一个 `TurnEndReason`；各变体由 [TurnEndReasonMap](core-data-structures/session.md#why-a-turn-ended-turnendreasonmap) 统一定义。
+
+### Agent 句柄
+
+`ctx.agents` 拥有活跃 agent，并返回 `AgentHandle { agent, dispose() }`。插件使用 `send()`、`steer()`、`inject()`、`cancel()` 和 `whenIdle()`。调用方 fiber、工厂提供方和消费方句柄通过同一个需等待完成的 disposer 共同拥有拆卸过程。
+
+### Agent 作用域
+
+每个 agent 都拥有一个作用域化的 `agent.ctx`；共享存储会在全局工具、提示词和命令条目之上叠加作用域条目，同时保留各领域视图（[决策](../.agents/notes/implemented/architecture/2026-07-12-scoped-layers-store.md)）。作用域监听器会过滤分派，每项作用域贡献都会在撤销时等待清理完成。`CreateAgentOptions.setup(agentCtx)` 在发布前完成组合。类型化解析器从合并后的 `Events` 和 `scopeTarget` 推导载体检查（[语义门禁](../.agents/notes/implemented/process/2026-07-14-typescript-program-backed-semantic-gates.md)）。参见 [agent 作用域](../.agents/notes/implemented/architecture/2026-07-08-agent-scope-contexts.md)和 [subagent 组合](../.agents/notes/implemented/feature/2026-07-12-subagent-persona-tool-filter-and-depth.md)。`AgentLoop` 在 `ctx.agents.withInitiator()` 内运行；私有编排会派生 `agent.session`，而轮次、步骤、信号、cwd 和权限仍保持显式（[决策](../.agents/notes/implemented/architecture/2026-07-15-agent-initiator-scope.md)）。
+
+## 状态
+
+### 会话日志
+
+会话日志是权威依据。`deriveMessages()` 投影出模型历史；原始 `assistant/chunk` 事件留在日志中，以保证回放和 UI 保真。fork、恢复、transcript（文本记录）渲染、遥测和持久化均派生自同一个事件流。
+
+**模型可见 ⟺ 已记录**：日志可以重建每个请求，包括由请求头会话前缀置于开头的 `step/start` 时消息，以及通过折叠 `request/header` 得到的请求头；开发期不变量会断言这一点（[可重建性](../.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.md)）。
+
+持久性由插件负责。后端会缓冲同步的 `session/event` 通知；循环等待轮次结束检查点。`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 则遵循同一契约。
+
+`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 agent 响应。fork 会继承标题（[决策](../.agents/notes/implemented/feature/2026-07-21-log-backed-session-titles.md)）。
+
+### 模型内容
+
+消息使用从可合并扩展的 `ContentBlockMap` 派生的类型化块；`MessageSource`、`FinishReason`、`TurnTrigger` 和 `TurnEndReason` 也采用同一模式定义类型。新增块会协调适配器、UI、压缩、token 计量和持久化；回放计量见 [token-meter.md](core-data-structures/token-meter.md)。
+
+流式输出使用原始分片和 `BlockAssembler`。每次 `LlmAdapter.stream()` 调用代表一次提供方尝试；适配器报告事实，`agent/request-error` 负责恢复。循环会记录分片及成功结果的来源信息和回放状态。远程适配器使用逐次读取空闲看门狗。只有当路由共用同一个适配器实例时，回放状态才会跨路由传递（[契约](core-data-structures/llm-streaming.md)）。
+
+## 扩展与组合
+
+### 功能模式
+
+可替换功能通常拆分为**接口／实现／消费方**：服务和事件、后端，以及面向模型的工具和提示词。Bash 是参考实现；[功能图](capability-seams.md)映射了每个包族。
+
+例外情况会合并不同层次：LLM（大语言模型）合并接口和消费方，文件系统整合策略，web 使用注册表，skill 和 subagent 使用具名提供方。subagent 可以通过 spawn 创建全新实例、fork 一个已完成轮次的前缀，或使用 ACP（Agent Client Protocol）子 agent（[subagent.md](core-data-structures/subagent.md)）。
+
+`dsh-workspace-context` 在 `agent/session-prefix` 上组合基线，并在通过 `ctx.fs` 发现嵌套变更后，于 `tools/post-execute` 追加这些变更；其[决策](../.agents/notes/implemented/feature/2026-06-24-workspace-context.md)记录了隔离方式。`dsh-paths` 负责共享路径。
+
+### 组合包与应用
+
+`dsh-agent-spine-demo` 组合一套主干和可选目标。应用包负责 TUI、单次运行的 CLI（命令行界面）以及 ACP/JSON-RPC 入口（[README](../packages/examples/agent-spine-demo/README.md)、[ui/](../packages/ui/README.md)）。`dsh-jsonrpc-agent` 启动外部 `cordis.yml`；Python SDK 仅在没有显式配置时提供默认项（[Python SDK](../python/README.md)）。轻量部署使用可替换后端和可选工具（[examples/](../examples/AGENTS.md)、[可运行接线](cookbook/extension-cookbook.md#runnable-wirings)、[图谱](graph-atlas.md)）。
+
+### 新行为的归属位置
+
+新行为附加到已有文档记录的扩展点；循环发生变更时，本架构图随之更新。
+
+| 目标 | 机制 |
+|---|---|
+| 添加模型提供方 | 在 `ctx.llm` 上注册适配器 |
+| 添加面向模型的功能 | 在 `ctx.tools` 上注册；schema 进入提示词组装流程 |
+| 添加 shell 执行 | 实现并注册 `ctx.bash` 后端 |
+| 添加用户命令 | 在 `ctx.commands` 上注册；适配器无需模型轮次即可发现并分派该命令 |
+| 添加后台工作 | 在 `ctx.tasks` 上注册；通用 `task_*` 工具负责收集或停止 |
+| 添加文件系统访问或策略 | 实现 `ctx.fs` 提供方，或监听 `fs/*` 策略事件 |
+| 限制生成的进程 | 使用 `ctx.sandbox` 后端；消费方在生成进程前包装 argv |
+| 拦截请求、工具或轮次 | 使用相应的 `agent/*` 或 `tools/*` 事件；`agent/turn-stop` 是串行终止判定点 |
+| 添加历史记录之外的会话稳定前缀 | 组合 `agent/session-prefix`；请求头会记录该前缀 |
+| 添加 UI 或编辑器集成 | 驱动 `ctx.agents` 并从 `session/event` 渲染 |
+| 添加持久会话状态 | 添加一个 `SessionEventMap` 成员，并从日志渲染和回放 |
+| 添加异步会话标题生成 | 在 `ctx.sessionTitle` 上注册唯一提供方 |
+| 管理同会话目标 | 使用 `ctx.goals`；通过 `Agent` 和 `agent/*` 续跑 |
+| fork 活跃会话 | 使用 `ctx.sessions.fork(source, boundary?, childSessionId?)` |
+| 将注册项限定到单个 agent | 使用该 agent 的 `agent.ctx`（参见 Agent 作用域） |
+
+[扩展实操手册（cookbook）](cookbook/extension-cookbook.md)提供插件骨架和功能到服务边界的映射；分步指南涵盖[包](cookbook/adding-a-package.md)、[工具](cookbook/adding-a-tool.md)、[LLM 适配器](cookbook/adding-an-llm-adapter.md)和 [vendored 包](cookbook/adding-a-vendored-package.md)。
+
+## 快速参考
+- [术语表](glossary.md)中的领域术语
+- [core-data-structures/](core-data-structures/core.md) 中的类型定义
+- [事件](cordis-catalog/events.md)和[服务](cordis-catalog/services.md)目录中的准确签名
+- [包索引](../packages/README.md)中的包契约
+- [Agent Note（agent 决策记录）](../.agents/notes/README.md)

docs/capability-seams.md

@@ -36,6 +36,10 @@ flowchart LR
   pkg_hooks_codex["hooks-codex"]
   pkg_acp["acp"]
   svc_sessionQuery["ctx.sessionQuery<br/>Exact session-history reads and traces"]
+  pkg_session_title["session-title"]
+  svc_sessionTitle["ctx.sessionTitle<br/>Log-backed session titles"]
+  pkg_session_title_first_message_llm["session-title-first-message-llm"]
+  pkg_session_title_all_messages_llm["session-title-all-messages-llm"]
   pkg_system_prompt["system-prompt"]
   svc_systemPrompt["ctx.systemPrompt<br/>System prompt assembly registry"]
   pkg_tools["tools"]
@@ -140,6 +144,9 @@ flowchart LR
   pkg_session_persistence_jsonl --> svc_sessionPersistence
   pkg_session_persistence_sqlite --> svc_sessionPersistence
   pkg_session_query --> svc_sessionQuery
+  pkg_session_title --> svc_sessionTitle
+  pkg_session_title_all_messages_llm --> svc_sessionTitle
+  pkg_session_title_first_message_llm --> svc_sessionTitle
   pkg_skill --> svc_skills
   pkg_skill_local --> svc_skills
   pkg_spill --> svc_spillStore
@@ -241,6 +248,7 @@ flowchart LR
 | `ctx.invariants` | `core` | [`invariants`](../packages/support/invariants) | - | [`session`](../packages/core/session), [`agent`](../packages/core/agent), [`scope`](../packages/core/scope), [`agent-loop`](../packages/core/agent-loop) | - | Companion subpaths register owner-local checks; the service owns selection, uniqueness, child fibers, and package-attributed failures. |
 | `ctx.sessionPersistence` | `seam` | [`session-persistence`](../packages/session-persistence/session-persistence) | [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`session-persistence-sqlite`](../packages/session-persistence/session-persistence-sqlite) | [`agent-loop`](../packages/core/agent-loop), [`tool-bash`](../packages/bash/tool-bash), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`acp`](../packages/ui/acp), [`session-query`](../packages/session-query/session-query) | - | Backends persist the same SessionEvent vocabulary; apps choose a backend at composition time. |
 | `ctx.sessionQuery` | `seam` | [`session-query`](../packages/session-query/session-query) | - | - | - | Resolves live and optional persisted logs into one logical corpus for exact reads and relationship traces. |
+| `ctx.sessionTitle` | `seam` | [`session-title`](../packages/session-title/session-title) | [`session-title-first-message-llm`](../packages/session-title/session-title-first-message-llm), [`session-title-all-messages-llm`](../packages/session-title/session-title-all-messages-llm) | - | - | Owns the deterministic fallback, latest-title fold, and sole optional asynchronous provider registration. |
 | `ctx.systemPrompt` | `core` | [`system-prompt`](../packages/core/system-prompt) | - | [`agent-loop`](../packages/core/agent-loop), [`tools`](../packages/core/tools), [`tool-fs`](../packages/fs/tool-fs), [`tool-web`](../packages/web/tool-web) | - | Collects prompt sections and model-facing tool schemas for each step. |
 | `ctx.tools` | `core` | [`tools`](../packages/core/tools) | - | [`agent-loop`](../packages/core/agent-loop), [`tool-ask-user`](../packages/ui/tool-ask-user), [`tool-bash`](../packages/bash/tool-bash), [`tool-cordis`](../packages/cordis/tool-cordis), [`tool-fs`](../packages/fs/tool-fs), [`tool-skill`](../packages/skill/tool-skill), [`tool-subagent`](../packages/subagent/tool-subagent), [`tool-todo`](../packages/todo/tool-todo), [`tool-web`](../packages/web/tool-web), [`acp`](../packages/ui/acp) | - | Registers capabilities, owns Code Mode transport, and routes calls through pre-policy, monotonic guards, around dispatch, post-policy, and final-result observation. |
 | `ctx.userInteraction` | `seam` | [`user-interaction`](../packages/ui/user-interaction) | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | [`tool-ask-user`](../packages/ui/tool-ask-user), [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | UI front doors provide the active human-answer provider; tool-ask-user pauses a tool call on the provider-neutral ask() promise. |

docs/config-catalog.md

@@ -27,7 +27,7 @@ export interface AcpConfig {
 
 Depends on: `Stream` (`@agentclientprotocol/sdk`)
 
-Source: [`packages/ui/acp/src/index.ts:252`](../packages/ui/acp/src/index.ts)
+Source: [`packages/ui/acp/src/index.ts:254`](../packages/ui/acp/src/index.ts)
 
 ## `@deepseek-ai/dsh-acp-demo`
 
@@ -56,6 +56,8 @@ export interface Config {
   tools?: ToolsConfig
   /** DeepSeek Harness home directory exposed to bash and used for local skill discovery. */
   dshHome?: string
+  /** Fallback session-title limits forwarded through agent-spine-demo. */
+  sessionTitle?: NonNullable<agentCore.Config['sessionTitle']>
   /** Directory the JSONL session backend writes under. Defaults to `./.sessions`. */
   persistenceRoot?: string
   /** JSONL artifact encoding; defaults to checksummed Zstandard frames. */
@@ -118,7 +120,8 @@ Source: [`packages/core/agent-loop/src/index.ts:360`](../packages/core/agent-loo
  * bridge, simply omits it), `persona` and `toolOrder` to the system-prompt
  * plugin (the deployment's persona section and the explicit model-facing tool
  * order), the `tools` object to the tool registry (its presentation `mode`),
- * `dshHome` to bash environment and local skill discovery, `skills` to the
+ * `dshHome` to bash environment and local skill discovery, `sessionTitle` to
+ * the fallback title service, `skills` to the
  * skill registry/local provider/tool consumer, `workspaceContext` to the
  * workspace-context loader, `llmRetry` to the bounded request-recovery policy,
  * and `toolBash`/`toolTasks` to the model-facing tool plugins this bundle owns.
@@ -143,6 +146,8 @@ export interface Config {
   tools?: ToolsConfig
   /** DeepSeek Harness home directory shared by shell context and local skill discovery. */
   dshHome?: string
+  /** Deterministic fallback and accepted-title limits; omission uses the bundle's example policy. */
+  sessionTitle?: SessionTitleConfig
   /** Workspace-context loader controls with an explicit byte budget; set `false` for hermetic prompts. */
   workspaceContext: workspaceContext.Config | false
   /** Skill registry, local provider, and model-facing consumer config. */
@@ -180,9 +185,9 @@ export interface GoalConfig {
 }
 ```
 
-Depends on: [`AgentLoopConfig`](#deepseek-aidsh-agent-loop) · [`GoalDomainConfig`](#deepseek-aidsh-goal) · [`InvariantConfig`](#deepseek-aidsh-invariants) · [`llmRetry`](../packages/llm/llm-retry/src/index.ts) · [`SkillLocal`](../packages/skill/skill-local/src/index.ts) · [`SkillRegistryConfig`](#deepseek-aidsh-skill) · [`SystemPromptConfig`](#deepseek-aidsh-system-prompt) · [`toolBash`](../packages/bash/tool-bash/src/index.ts) · [`toolGoal`](../packages/goal/tool-goal/src/index.ts) · [`ToolsConfig`](#deepseek-aidsh-tools) · [`toolSkill`](../packages/skill/tool-skill/src/index.ts) · [`toolTasks`](../packages/tasks/tool-tasks/src/index.ts) · [`workspaceContext`](../packages/context/workspace-context/src/index.ts)
+Depends on: [`AgentLoopConfig`](#deepseek-aidsh-agent-loop) · [`GoalDomainConfig`](#deepseek-aidsh-goal) · [`InvariantConfig`](#deepseek-aidsh-invariants) · [`llmRetry`](../packages/llm/llm-retry/src/index.ts) · [`SessionTitleConfig`](#deepseek-aidsh-session-title) · [`SkillLocal`](../packages/skill/skill-local/src/index.ts) · [`SkillRegistryConfig`](#deepseek-aidsh-skill) · [`SystemPromptConfig`](#deepseek-aidsh-system-prompt) · [`toolBash`](../packages/bash/tool-bash/src/index.ts) · [`toolGoal`](../packages/goal/tool-goal/src/index.ts) · [`ToolsConfig`](#deepseek-aidsh-tools) · [`toolSkill`](../packages/skill/tool-skill/src/index.ts) · [`toolTasks`](../packages/tasks/tool-tasks/src/index.ts) · [`workspaceContext`](../packages/context/workspace-context/src/index.ts)
 
-Source: [`packages/examples/agent-spine-demo/src/index.ts:78`](../packages/examples/agent-spine-demo/src/index.ts)
+Source: [`packages/examples/agent-spine-demo/src/index.ts:87`](../packages/examples/agent-spine-demo/src/index.ts)
 
 ## `@deepseek-ai/dsh-bash-local`
 
@@ -245,6 +250,8 @@ export interface Config {
   tools?: ToolsConfig
   /** DeepSeek Harness home directory exposed to bash and used for local skill discovery. */
   dshHome?: string
+  /** Fallback session-title limits forwarded through agent-spine-demo. */
+  sessionTitle?: NonNullable<agentCore.Config['sessionTitle']>
   /** Directory the JSONL session backend writes under. Defaults to `./.sessions`. */
   persistenceRoot?: string
   /** JSONL artifact encoding; defaults to checksummed Zstandard frames. */
@@ -885,7 +892,7 @@ export interface Config {
 export type JsonlCompression = 'zstd' | 'none'
 ```
 
-Source: [`packages/session-persistence/session-persistence-jsonl/src/index.ts:36`](../packages/session-persistence/session-persistence-jsonl/src/index.ts)
+Source: [`packages/session-persistence/session-persistence-jsonl/src/index.ts:37`](../packages/session-persistence/session-persistence-jsonl/src/index.ts)
 
 ## `@deepseek-ai/dsh-session-persistence-sqlite`
 
@@ -940,6 +947,50 @@ export interface Config {
 
 Source: [`packages/session-query/session-query/src/config.ts:9`](../packages/session-query/session-query/src/config.ts)
 
+## `@deepseek-ai/dsh-session-title`
+
+Requires: `sessions`
+
+```ts config-catalog
+/** Required deterministic fallback and accepted-title limits. */
+export interface Config {
+  /** Maximum whitespace-delimited words in the built-in fallback. */
+  readonly fallbackMaxWords: number
+  /** Maximum UTF-8 bytes in the built-in fallback. */
+  readonly fallbackMaxBytes: number
+  /** Maximum UTF-8 bytes in any accepted title. */
+  readonly maxTitleBytes: number
+}
+```
+
+Source: [`packages/session-title/session-title/src/index.ts:69`](../packages/session-title/session-title/src/index.ts)
+
+## `@deepseek-ai/dsh-session-title-all-messages-llm`
+
+Requires: `sessionTitle` · `llm` · `sessions`
+
+```ts config-catalog
+/** Required LLM policy; this plugin adds no defaults. */
+export type Config = SessionTitleLlmConfig
+```
+
+Depends on: [`SessionTitleLlmConfig`](../packages/session-title/session-title-llm/src/index.ts)
+
+Source: [`packages/session-title/session-title-all-messages-llm/src/index.ts:15`](../packages/session-title/session-title-all-messages-llm/src/index.ts)
+
+## `@deepseek-ai/dsh-session-title-first-message-llm`
+
+Requires: `sessionTitle` · `llm` · `sessions`
+
+```ts config-catalog
+/** Required LLM policy; this plugin adds no defaults. */
+export type Config = SessionTitleLlmConfig
+```
+
+Depends on: [`SessionTitleLlmConfig`](../packages/session-title/session-title-llm/src/index.ts)
+
+Source: [`packages/session-title/session-title-first-message-llm/src/index.ts:15`](../packages/session-title/session-title-first-message-llm/src/index.ts)
+
 ## `@deepseek-ai/dsh-skill`
 
 ```ts config-catalog
@@ -1044,7 +1095,7 @@ export interface Config {
    * before the parent escalates to a signal.
    */
   disposeEofGraceMs?: number
-  /** Grace period (ms) between `SIGTERM` and the `SIGKILL` escalation on dispose. */
+  /** Termination confirmation window (ms), including forced exit on every platform. */
   disposeGraceMs?: number
 }
 
@@ -1442,7 +1493,7 @@ export interface TuiConfig {
 }
 ```
 
-Source: [`packages/ui/tui/src/index.ts:127`](../packages/ui/tui/src/index.ts)
+Source: [`packages/ui/tui/src/index.ts:128`](../packages/ui/tui/src/index.ts)
 
 ## `@deepseek-ai/dsh-tui-demo`
 
@@ -1463,6 +1514,8 @@ export interface Config {
   tools?: ToolsConfig
   /** DeepSeek Harness home directory exposed to bash and used for local skill discovery. */
   dshHome?: string
+  /** Fallback session-title limits forwarded through agent-spine-demo. */
+  sessionTitle?: NonNullable<agentCore.Config['sessionTitle']>
   /** Directory the JSONL session backend writes under. Defaults to `./.sessions`. */
   persistenceRoot?: string
   /** JSONL artifact encoding; defaults to checksummed Zstandard frames. */
@@ -1722,7 +1775,6 @@ Imported as libraries by other packages; a `cordis.yml` cannot load them.
 - `@deepseek-ai/dsh-app-boot` ([`packages/ui/app-boot/src/index.ts`](../packages/ui/app-boot/src/index.ts))
 - `@deepseek-ai/dsh-brand` ([`packages/util/brand/src/index.ts`](../packages/util/brand/src/index.ts))
 - `@deepseek-ai/dsh-helper` ([`packages/sdk/helper/src/index.ts`](../packages/sdk/helper/src/index.ts))
-- `@deepseek-ai/dsh-home` ([`packages/util/home/src/index.ts`](../packages/util/home/src/index.ts))
 - `@deepseek-ai/dsh-hook-protocol` ([`packages/hooks/hook-protocol/src/index.ts`](../packages/hooks/hook-protocol/src/index.ts))
 - `@deepseek-ai/dsh-jsonrpc-demo` ([`packages/examples/jsonrpc-demo/src/index.ts`](../packages/examples/jsonrpc-demo/src/index.ts))
 - `@deepseek-ai/dsh-loader-smoke` ([`packages/support/loader-smoke/src/index.ts`](../packages/support/loader-smoke/src/index.ts))
@@ -1730,6 +1782,7 @@ Imported as libraries by other packages; a `cordis.yml` cannot load them.
 - `@deepseek-ai/dsh-retention` ([`packages/util/retention/src/index.ts`](../packages/util/retention/src/index.ts))
 - `@deepseek-ai/dsh-scope` ([`packages/core/scope/src/index.ts`](../packages/core/scope/src/index.ts))
 - `@deepseek-ai/dsh-scripts` ([`packages/sdk/scripts/src/index.ts`](../packages/sdk/scripts/src/index.ts))
+- `@deepseek-ai/dsh-session-title-llm` ([`packages/session-title/session-title-llm/src/index.ts`](../packages/session-title/session-title-llm/src/index.ts))
 - `@deepseek-ai/dsh-subagent-inprocess` ([`packages/subagent/subagent-inprocess/src/index.ts`](../packages/subagent/subagent-inprocess/src/index.ts))
 - `@deepseek-ai/dsh-subagent-subprocess` ([`packages/subagent/subagent-subprocess/src/index.ts`](../packages/subagent/subagent-subprocess/src/index.ts))
 - `@deepseek-ai/dsh-telemetry` ([`packages/sdk/telemetry/src/index.ts`](../packages/sdk/telemetry/src/index.ts))

docs/cordis-catalog/events.md

@@ -532,11 +532,11 @@ Waterfall around every streaming model call (retry, replay, routing). Bound to t
  * Waterfall around every streaming model call (retry, replay, routing).
  * Bound to the {@link LlmService}; call `next()` to reach the resolved
  * adapter's stream, or yield your own chunks to short-circuit.
- * @param options - the full request. A LOOP-built request arrives
+ * @param options - the full request. A LOOP-built request carries the
- *   deep-frozen (mutation throws): its content is a pure function of the
+ *   process-local {@link markAgentLoopRequest} identity and arrives deep-frozen
- *   session log (the reconstructability Agent Note), so listeners read it, never
+ *   (mutation throws): its content is a pure function of the session log (the
- *   rewrite it. A hand-built one-shot (compaction summarize) is the
+ *   reconstructability Agent Note), so listeners read it, never rewrite it.
- *   caller's own object and stays mutable here.
+ *   Hand-built calls own their mutability policy and do not carry that marker.
  * @mode waterfall
  */
 'llm/stream'(this: LlmService, options: GenerateOptions, next: () => AsyncIterable<StreamChunk>): AsyncIterable<StreamChunk>
@@ -569,7 +569,7 @@ Creation announcement during session publication. A synchronous throw vetoes and
 
 Types: [Scoped](../core-data-structures/scope.md) · [Session](../core-data-structures/session.md)
 
-Source: [`packages/core/session/src/index.ts:47`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:68`](../../packages/core/session/src/index.ts)
 
 ### `session/disposed` — emit
 
@@ -590,7 +590,7 @@ Emitted once when an announced session leaves the store, including publication r
 
 Types: [Scoped](../core-data-structures/scope.md) · [Session](../core-data-structures/session.md)
 
-Source: [`packages/core/session/src/index.ts:57`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:78`](../../packages/core/session/src/index.ts)
 
 ### `session/event` — emit
 
@@ -613,7 +613,7 @@ Post-commit, fire-and-forget append feed. The listener snapshot resolves before
 
 Types: [Scoped](../core-data-structures/scope.md) · [Session](../core-data-structures/session.md) · [SessionEvent](../core-data-structures/core.md)
 
-Source: [`packages/core/session/src/index.ts:69`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:90`](../../packages/core/session/src/index.ts)
 
 ### `session/flush` — parallel
 
@@ -634,7 +634,7 @@ Awaited parallel durability checkpoint: every listener runs and the caller await
 
 Types: [Scoped](../core-data-structures/scope.md) · [Session](../core-data-structures/session.md)
 
-Source: [`packages/core/session/src/index.ts:79`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:100`](../../packages/core/session/src/index.ts)
 
 ## `subagent/*`
 

docs/cordis-catalog/services.md

@@ -828,6 +828,13 @@ Live-preferred logical-corpus exact-read and relationship-tracing service.
  */
 listSessions(): Promise<SessionRecord[]>
 
+/**
+ * Fold the latest log-backed title from one live-preferred logical session.
+ * @param sessionId - live or persisted session id to read.
+ * @returns latest title snapshot, or `undefined` when the log has no title event.
+ */
+async readTitle(sessionId: SessionId): Promise<SessionTitleSnapshot | undefined>
+
 /**
  * List lightweight raw-log event records for one logical session.
  * @param sessionId - live-preferred session id to read.
@@ -859,9 +866,9 @@ async traceEvent(request: SessionEventTraceRequest): Promise<SessionEventTrace>
 async readEvent(request: SessionEventReadRequest): Promise<SessionEventWindow>
 ```
 
-Types: [SessionEventReadRequest](../core-data-structures/session-query.md) · [SessionEventRecord](../core-data-structures/session-query.md) · [SessionEventTrace](../core-data-structures/session-query.md) · [SessionEventTraceRequest](../core-data-structures/session-query.md) · [SessionEventWindow](../core-data-structures/session-query.md) · [SessionId](../core-data-structures/core.md) · [SessionLineageTrace](../core-data-structures/session-query.md) · [SessionRecord](../core-data-structures/session-query.md)
+Types: [SessionEventReadRequest](../core-data-structures/session-query.md) · [SessionEventRecord](../core-data-structures/session-query.md) · [SessionEventTrace](../core-data-structures/session-query.md) · [SessionEventTraceRequest](../core-data-structures/session-query.md) · [SessionEventWindow](../core-data-structures/session-query.md) · [SessionId](../core-data-structures/core.md) · [SessionLineageTrace](../core-data-structures/session-query.md) · [SessionRecord](../core-data-structures/session-query.md) · [SessionTitleSnapshot](../core-data-structures/session-title.md)
 
-Source: [`packages/session-query/session-query/src/index.ts:38`](../../packages/session-query/session-query/src/index.ts)
+Source: [`packages/session-query/session-query/src/index.ts:40`](../../packages/session-query/session-query/src/index.ts)
 
 ## `ctx.sessions` — `SessionStore`
 
@@ -957,6 +964,28 @@ announce(session: Session): void
  */
 async flush(session: Session): Promise<void>
 
+/**
+ * Append one plugin-declared log-only event without borrowing the agent
+ * loop's lifecycle. An open turn receives the event directly and remains
+ * responsible for its ordinary checkpoint. A closed log receives one
+ * zero-step turn around the event, followed by an awaited flush.
+ *
+ * Once the synthetic `turn/start` commits, this method always attempts its
+ * matching `turn/end` and flush, including when the target append fails.
+ * Detachment requested by an event or flush listener is deferred until that
+ * sequence settles, so publication cannot switch from a live scoped session
+ * to an unobserved bare `Session` halfway through the update.
+ *
+ * @param session - exact live session that owns the target log.
+ * @param type - event type opted into {@link OutOfBandSessionEventMap} by its owner.
+ * @param data - typed JSON payload for the target event.
+ * @param trigger - plugin-owned turn trigger used only when the log is closed.
+ * @returns the accepted target event with its assigned sequence and timestamp.
+ * @throws when the session is detached, another out-of-band append is active,
+ *   event acceptance fails, the synthetic turn cannot close, or flushing fails.
+ */
+async appendOutOfBand<T extends OutOfBandSessionEventType>( session: Session, type: T, data: SessionEventMap[T], trigger: TurnTrigger, ): Promise<SessionEvent<T>>
+
 /**
  * Look up a live session.
  * @param id - the session id to look up.
@@ -986,9 +1015,43 @@ list(): Session[]
 fork(source: SessionForkSource, boundary?: number, childSessionId?: SessionId): Session
 ```
 
-Types: [CreateSessionOptions](../core-data-structures/persistence.md) · [Session](../core-data-structures/session.md) · [SessionId](../core-data-structures/core.md)
+Types: [CreateSessionOptions](../core-data-structures/persistence.md) · [OutOfBandSessionEventType](../core-data-structures/session.md) · [Session](../core-data-structures/session.md) · [SessionEvent](../core-data-structures/core.md) · [SessionEventMap](../core-data-structures/session.md) · [SessionId](../core-data-structures/core.md) · [TurnTrigger](../core-data-structures/session.md)
 
-Source: [`packages/core/session/src/index.ts:570`](../../packages/core/session/src/index.ts)
+Source: [`packages/core/session/src/index.ts:592`](../../packages/core/session/src/index.ts)
+
+## `ctx.sessionTitle` — `SessionTitleService`
+
+Log-backed title fold plus asynchronous fallback generation.
+
+```ts cordis-catalog
+/**
+ * Read the latest folded title from one live or replayed session.
+ * @param session - session whose log is the title source of truth.
+ * @returns latest title snapshot, or `undefined` before eligible input.
+ */
+get(session: Session): SessionTitleSnapshot | undefined
+
+/**
+ * Explicitly retry the registered provider, or materialize the built-in
+ * fallback when no provider is registered.
+ * @param session - exact live session to refresh.
+ * @param signal - optional caller cancellation; an in-progress fallback append may finish durably before rejection.
+ * @returns latest accepted title, or `undefined` when no eligible text exists.
+ */
+async refresh(session: Session, signal?: AbortSignal): Promise<SessionTitleSnapshot | undefined>
+
+/**
+ * Register the sole optional title provider. Disposal aborts its pending and
+ * active work before another provider may register.
+ * @param provider - provider identity, cadence, and generation function.
+ * @returns exact Cordis effect disposer, which settles after active calls quiesce.
+ */
+register(provider: SessionTitleProvider): () => Promise<void>
+```
+
+Types: [Session](../core-data-structures/session.md) · [SessionTitleProvider](../core-data-structures/session-title.md) · [SessionTitleSnapshot](../core-data-structures/session-title.md)
+
+Source: [`packages/session-title/session-title/src/index.ts:282`](../../packages/session-title/session-title/src/index.ts)
 
 ## `ctx.skills` — `SkillService`
 

docs/core-data-structures/core.md

@@ -23,6 +23,7 @@ Everything else is documented on a **sub-page**, not here. The rule that draws t
 | [session.md](session.md) | the full `SessionEventMap` variant catalog, `TurnTrigger`/`TurnEndReason`, `deriveMessages()`, the turn-enclosure invariant |
 | [persistence.md](persistence.md) | the durability seam: `SessionPersistence`, JSONL + SQLite backends, `session/flush`, crash recovery, `SessionHeader` |
 | [session-query.md](session-query.md) | logical records, bounded exact-event reads, and relationship traces |
+| [session-title.md](session-title.md) | durable title snapshots, source provenance, and the asynchronous provider contract |
 | [system-prompt.md](system-prompt.md) | per-assembly context, tool-provider results, prompt sections, and cooperative assembly |
 | [tools.md](tools.md) | `ToolDefinition` full fields, the schema DSL, `ToolExecution`/`ToolResult`, tool-presentation UI types, and the guarded execution pipeline |
 | [user-interaction.md](user-interaction.md) | the UI-backed human question/answer seam: `AskUserQuestionRequest`, answer/options vocabulary, provider API, error taxonomy |
@@ -279,7 +280,7 @@ The model-facing `ToolSchema` is the wire shape; the registered `ToolDefinition`
 
 The loop builds each request from logged state. `EpochHeader` records call config, rendered prompt, authoritative returned tool order (configured by `toolOrder`, or lexicographic when unset), and session prefix through full `request/header` snapshots. Together with derived history, this makes the request reconstructable from the session log. See [session.md](session.md#the-request-header-event-requestheader) and the [reconstructability Agent Note](../../.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.md).
 
-`agent/request` receives a frozen call-config seed and may return a replacement to switch provider, model, or sampling. `agent/session-prefix` composes request-only prefix messages once per loop instance, and the header records the exact result used. Requests reaching `llm/stream` are deep-frozen, so mutation throws.
+`agent/request` receives a frozen call-config seed and may return a replacement to switch provider, model, or sampling. `agent/session-prefix` composes request-only prefix messages once per loop instance, and the header records the exact result used. Requests reaching `llm/stream` are deep-frozen, so mutation throws, and carry a process-local loop identity so observers do not confuse separately logged frozen auxiliary calls with conversation requests.
 
 On the wire, a loop-built request reads in this order: the `system` slot (the rendered prompt assembly) → `messagePrefix` (the frozen session prefix) → the derived history — the boundary snapshot, whose tail is the newest `user/message` on a turn's first step and the previous step's tool results on later steps. The prefix never enters the derived history; its durable record is the header events, and the dev invariant recomputes exactly this equation against every loop-built request.
 

docs/core-data-structures/session-title.md

@@ -0,0 +1,140 @@
+# Session Titles
+
+Durable latest-wins title state and the optional asynchronous provider vocabulary owned by [`@deepseek-ai/dsh-session-title`](../../packages/session-title/session-title). The shared LLM helper owns the exact auxiliary request record. Package READMEs own timing, fallback, failure, and fork behavior; the generated [persistence catalog](../persistence-catalog.md) owns the complete event declarations.
+
+Sources: [`packages/session-title/session-title/src/index.ts`](../../packages/session-title/session-title/src/index.ts), [`packages/session-title/session-title-llm/src/index.ts`](../../packages/session-title/session-title-llm/src/index.ts)
+
+## Durable title state
+
+`SessionTitleProviderId` is recorded for provider-produced revisions. `SessionTitleEventData` carries exact human-message provenance, while `SessionTitleSnapshot` adds the durable event envelope facts selected by `foldSessionTitle()`.
+
+```ts type-equiv
+/** Identifies one session-title provider registration. */
+type SessionTitleProviderId = Branded<'SessionTitleProviderId'>
+```
+
+```ts type-equiv
+/** Exact auxiliary model route that produced a title. */
+interface SessionTitleModelProvenance {
+  /** Registered LLM provider route. */
+  readonly provider: string
+  /** Provider model id. */
+  readonly model: string
+}
+```
+
+```ts type-equiv
+/** Durable ownership record for an accepted session title. */
+type SessionTitleSource =
+  | { readonly kind: 'fallback' }
+  | {
+    readonly kind: 'provider'
+    readonly provider: SessionTitleProviderId
+    readonly model?: SessionTitleModelProvenance
+  }
+```
+
+```ts type-equiv
+/** Payload of the log-only `session/title` event. */
+interface SessionTitleEventData {
+  /** Normalized non-empty title text. */
+  readonly title: string
+  /** Exact human `user/message` seqs used to derive this title. */
+  readonly messageSeqs: number[]
+  /** Built-in fallback or registered-provider provenance. */
+  readonly source: SessionTitleSource
+}
+```
+
+```ts type-equiv
+/** Latest folded title plus the title event's durable envelope facts. */
+interface SessionTitleSnapshot extends SessionTitleEventData {
+  /** Seq of the latest `session/title` event. */
+  readonly eventSeq: number
+  /** Timestamp of the latest `session/title` event. */
+  readonly updatedAt: number
+}
+```
+
+## Auxiliary request record
+
+The shared LLM helper records each validated, dispatchable title request before calling the model. The payload reproduces the model-visible system and message input, routing, output limit, provider ownership, and source-message attribution even when generation later fails.
+
+```ts type-equiv
+/** Exact model-visible request recorded before one auxiliary title dispatch. */
+interface SessionTitleLlmRequestEventData {
+  /** Registered title-provider identity responsible for the request. */
+  readonly titleProvider: SessionTitleProviderId
+  /** Exact human `user/message` seqs represented in `messages`. */
+  readonly messageSeqs: number[]
+  /** Exact auxiliary LLM route. */
+  readonly route: SessionTitleModelProvenance
+  /** Exact auxiliary system prompt. */
+  readonly system: string
+  /** Exact auxiliary message list. */
+  readonly messages: Message[]
+  /** Exact auxiliary output-token cap. */
+  readonly maxTokens: number
+}
+```
+
+## Provider input and output
+
+The service snapshots eligible messages through one revision. A provider returns only seqs from that request; service-owned acceptance verifies ordering, normalizes the title, enforces the byte limit, and appends provenance.
+
+```ts type-equiv
+/** One eligible human text message exposed to title providers. */
+interface SessionTitleUserMessage {
+  /** Source `user/message` event seq. */
+  readonly seq: number
+  /** Exact concatenated text-block content. */
+  readonly text: string
+}
+```
+
+```ts type-equiv
+/** Automatic generation cadence owned by a registered provider. */
+type SessionTitleAutomaticMode = 'first-message' | 'all-user-messages'
+```
+
+```ts type-equiv
+/** Immutable input supplied to one title-provider call. */
+interface SessionTitleProviderRequest {
+  /** Live session being titled. */
+  readonly session: Session
+  /** All eligible human messages through this generation revision. */
+  readonly messages: readonly SessionTitleUserMessage[]
+  /** Exact current logged main-request route, when one has been recorded. */
+  readonly route?: SessionTitleModelProvenance
+  /** Cancellation for supersession, disposal, timeout composition, or the explicit caller. */
+  readonly signal: AbortSignal
+}
+```
+
+```ts type-equiv
+/** Provider output before service-owned normalization and durable acceptance. */
+interface SessionTitleProviderResult {
+  /** Proposed title text. */
+  readonly title: string
+  /** Exact seqs from `request.messages` used by this result. */
+  readonly messageSeqs: readonly number[]
+  /** Auxiliary LLM route, when generation used a model. */
+  readonly model?: SessionTitleModelProvenance
+}
+```
+
+```ts type-equiv
+/** One optional asynchronous title implementation registered with the service. */
+interface SessionTitleProvider {
+  /** Stable provider identity recorded in title provenance. */
+  readonly id: SessionTitleProviderId
+  /** When new human prompts start automatic generation. */
+  readonly automatic: SessionTitleAutomaticMode
+  /**
+   * Produce one title revision.
+   * @param request - message snapshot, current route, session, and cancellation.
+   * @returns proposed title plus exact input seqs and optional model provenance.
+   */
+  generate(request: SessionTitleProviderRequest): Promise<SessionTitleProviderResult>
+}
+```

docs/core-data-structures/session.md

@@ -94,6 +94,20 @@ interface SessionEventMap {
 }
 ```
 
+### `OutOfBandSessionEventMap` — narrow late-append opt-in
+
+`SessionEventMap` membership alone does not authorize an event outside the agent loop's ordinary lifecycle. An event owner declaration-merges the same key into this empty marker map before `ctx.sessions.appendOutOfBand()` accepts it; the derived type additionally excludes every surface event. An accepted update joins an open turn or receives a balanced, flushed zero-step turn.
+
+```ts type-equiv
+/**
+ * Marker map for plugin-owned log-only events accepted by
+ * `SessionStore.appendOutOfBand()`. A plugin extends this map with the same key
+ * it adds to {@link SessionEventMap}; surface and lifecycle events stay
+ * ineligible unless their owner explicitly opts them into this narrow seam.
+ */
+interface OutOfBandSessionEventMap {}
+```
+
 ### `TodoItem` — one todo-list entry
 
 The unit of the `todo/write` event's whole-list snapshot. Deliberately minimal — a `content` line and a three-state `status` (no id, priority, or `activeForm`): the list is replaced wholesale on every write, so entries need no stable identity, and the status triple is exactly the ACP `PlanEntryStatus`, so a UI bridge can map a todo list onto an ACP `plan` 1:1 (synthesizing the priority ACP additionally requires). See the [todo_write Agent Note](../../.agents/notes/implemented/feature/2026-06-29-todo-write-tool.md).
@@ -504,7 +518,7 @@ interface TurnEndReasonMap {
 
 ## The turn-enclosure invariant
 
-Every session event lives **inside** a turn (between a `turn/start` and its `turn/end`). The loop appends queued `user/message` events *after* `turn/start`, and an idle `agent.inject()` wraps its `context/message` in a one-shot `injection` turn. This makes the turn the single durability/replay boundary: a backend can treat anything after the last `turn/end` as an interrupted-crash tail without risking the loss of legitimately-recorded between-turn context. The optional `dsh-session/invariant` companion enforces it in dev through `ctx.invariants` (a message event outside an open turn throws). See [the turn-enclosure invariant Agent Note](../../.agents/notes/implemented/architecture/2026-06-15-turn-enclosure-invariant.md).
+Every session event lives **inside** a turn (between a `turn/start` and its `turn/end`). The loop appends queued `user/message` events *after* `turn/start`, an idle `agent.inject()` wraps its `context/message` in a one-shot `injection` turn, and `appendOutOfBand()` similarly wraps an eligible log-only event when no turn is open. This makes the turn the single durability/replay boundary: a backend can treat anything after the last `turn/end` as an interrupted-crash tail without risking the loss of legitimately-recorded between-turn context. The optional `dsh-session/invariant` companion enforces it in dev through `ctx.invariants` (a message event outside an open turn throws). See [the turn-enclosure invariant Agent Note](../../.agents/notes/implemented/architecture/2026-06-15-turn-enclosure-invariant.md).
 
 ## Plugin-contributed log-only events
 

docs/event-producer-consumer.md

@@ -30,11 +30,11 @@ This matrix shows which packages dispatch each harness-owned event and which pac
 | `fs/observed` | `emit` | [`packages/fs/fs/src/index.ts:71`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`emit`) | [`fs-policy`](../packages/fs/fs-policy) |
 | `fs/write-intent` | `waterfall` | [`packages/fs/fs/src/index.ts:54`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`waterfall`) | [`fs-policy`](../packages/fs/fs-policy) |
 | `goal/changed` | `emit` | [`packages/goal/goal/src/types.ts:167`](../packages/goal/goal/src/types.ts) | [`goal`](../packages/goal/goal) (`emit`) | [`goal-session`](../packages/goal/goal-session) |
-| `llm/stream` | `waterfall` | [`packages/llm/llm/src/index.ts:52`](../packages/llm/llm/src/index.ts) | [`llm`](../packages/llm/llm) (`waterfall`) | [`agent-loop`](../packages/core/agent-loop), [`llm`](../packages/llm/llm), [`llm-replay`](../packages/support/llm-replay) |
+| `llm/stream` | `waterfall` | [`packages/llm/llm/src/index.ts:52`](../packages/llm/llm/src/index.ts) | [`llm`](../packages/llm/llm) (`waterfall`) | [`agent-loop`](../packages/core/agent-loop), [`llm`](../packages/llm/llm), [`llm-replay`](../packages/support/llm-replay), [`session-title`](../packages/session-title/session-title) |
-| `session/created` | `emit` | [`packages/core/session/src/index.ts:47`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), [`llm-retry`](../packages/llm/llm-retry), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`user-approval`](../packages/ui/user-approval) |
+| `session/created` | `emit` | [`packages/core/session/src/index.ts:68`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), [`llm-retry`](../packages/llm/llm-retry), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`user-approval`](../packages/ui/user-approval) |
-| `session/disposed` | `emit` | [`packages/core/session/src/index.ts:57`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`agent-loop`](../packages/core/agent-loop), [`session-persistence`](../packages/session-persistence/session-persistence) |
+| `session/disposed` | `emit` | [`packages/core/session/src/index.ts:78`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`agent-loop`](../packages/core/agent-loop), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title) |
-| `session/event` | `emit` | [`packages/core/session/src/index.ts:69`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`acp`](../packages/ui/acp), [`cli-demo`](../packages/examples/cli-demo), [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`token-meter`](../packages/llm/token-meter), [`tui`](../packages/ui/tui), [`user-approval`](../packages/ui/user-approval), [`workspace-context`](../packages/context/workspace-context) |
+| `session/event` | `emit` | [`packages/core/session/src/index.ts:90`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`acp`](../packages/ui/acp), [`cli-demo`](../packages/examples/cli-demo), [`compact`](../packages/compact/compact), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`hook-protocol`](../packages/hooks/hook-protocol), [`jsonrpc`](../packages/ui/jsonrpc), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title), [`token-meter`](../packages/llm/token-meter), [`tui`](../packages/ui/tui), [`user-approval`](../packages/ui/user-approval), [`workspace-context`](../packages/context/workspace-context) |
-| `session/flush` | `parallel` | [`packages/core/session/src/index.ts:79`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`session-persistence`](../packages/session-persistence/session-persistence) |
+| `session/flush` | `parallel` | [`packages/core/session/src/index.ts:100`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`session-persistence`](../packages/session-persistence/session-persistence) |
 | `subagent/end` | `emit` | [`packages/subagent/subagent/src/index.ts:139`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`jsonrpc`](../packages/ui/jsonrpc), [`subagent`](../packages/subagent/subagent) |
 | `subagent/provider-added` | `emit` | [`packages/subagent/subagent/src/index.ts:113`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`emit`) | [`subagent`](../packages/subagent/subagent), [`tool-subagent`](../packages/subagent/tool-subagent) |
 | `subagent/provider-removed` | `emit` | [`packages/subagent/subagent/src/index.ts:119`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`subagent`](../packages/subagent/subagent), [`tool-subagent`](../packages/subagent/tool-subagent) |

docs/module-graph.md

@@ -9,7 +9,6 @@ Inter-package dependencies among the `@deepseek-ai/dsh-*` harness packages, deri
 flowchart TD
   subgraph group_util["packages/util"]
     pkg_brand["brand"]
-    pkg_home["home"]
     pkg_paths["paths"]
     pkg_retention["retention"]
     pkg_timeout["timeout"]
@@ -103,6 +102,12 @@ flowchart TD
   subgraph group_session_query["packages/session-query"]
     pkg_session_query["session-query"]
   end
+  subgraph group_session_title["packages/session-title"]
+    pkg_session_title["session-title"]
+    pkg_session_title_all_messages_llm["session-title-all-messages-llm"]
+    pkg_session_title_first_message_llm["session-title-first-message-llm"]
+    pkg_session_title_llm["session-title-llm"]
+  end
   subgraph group_support["packages/support"]
     pkg_acp_snapshot["acp-snapshot"]
     pkg_agent_loop_testkit["agent-loop-testkit"]
@@ -168,7 +173,6 @@ flowchart TD
     pkg_workflow_workerthread["workflow-workerthread"]
   end
   pkg_brand --> pkg_invariants
-  pkg_home --> pkg_invariants
   pkg_paths --> pkg_invariants
   pkg_retention --> pkg_invariants
   pkg_timeout --> pkg_invariants
@@ -190,6 +194,7 @@ flowchart TD
   pkg_scripts --> pkg_invariants
   pkg_telemetry --> pkg_brand
   pkg_telemetry --> pkg_invariants
+  pkg_telemetry --> pkg_paths
   pkg_llm_deepseek --> pkg_invariants
   pkg_llm_deepseek --> pkg_llm
   pkg_llm_deepseek --> pkg_timeout
@@ -246,6 +251,10 @@ flowchart TD
   pkg_spill --> pkg_session
   pkg_session_persistence --> pkg_invariants
   pkg_session_persistence --> pkg_session
+  pkg_session_title --> pkg_brand
+  pkg_session_title --> pkg_invariants
+  pkg_session_title --> pkg_llm
+  pkg_session_title --> pkg_session
   pkg_llm_replay --> pkg_invariants
   pkg_llm_replay --> pkg_llm
   pkg_llm_replay --> pkg_session
@@ -279,8 +288,8 @@ flowchart TD
   pkg_fs_policy --> pkg_fs
   pkg_fs_policy --> pkg_invariants
   pkg_skill_local --> pkg_fs
-  pkg_skill_local --> pkg_home
   pkg_skill_local --> pkg_invariants
+  pkg_skill_local --> pkg_paths
   pkg_skill_local --> pkg_skill
   pkg_compact_basic --> pkg_agent
   pkg_compact_basic --> pkg_compact
@@ -304,6 +313,12 @@ flowchart TD
   pkg_session_query --> pkg_llm
   pkg_session_query --> pkg_session
   pkg_session_query --> pkg_session_persistence
+  pkg_session_query --> pkg_session_title
+  pkg_session_title_llm --> pkg_invariants
+  pkg_session_title_llm --> pkg_llm
+  pkg_session_title_llm --> pkg_session
+  pkg_session_title_llm --> pkg_session_title
+  pkg_session_title_llm --> pkg_timeout
   pkg_commands --> pkg_agent
   pkg_commands --> pkg_invariants
   pkg_commands --> pkg_scope
@@ -356,6 +371,16 @@ flowchart TD
   pkg_fs_sandbox --> pkg_invariants
   pkg_fs_sandbox --> pkg_sandbox
   pkg_fs_sandbox --> pkg_sandbox_policy
+  pkg_session_title_all_messages_llm --> pkg_invariants
+  pkg_session_title_all_messages_llm --> pkg_llm
+  pkg_session_title_all_messages_llm --> pkg_session
+  pkg_session_title_all_messages_llm --> pkg_session_title
+  pkg_session_title_all_messages_llm --> pkg_session_title_llm
+  pkg_session_title_first_message_llm --> pkg_invariants
+  pkg_session_title_first_message_llm --> pkg_llm
+  pkg_session_title_first_message_llm --> pkg_session
+  pkg_session_title_first_message_llm --> pkg_session_title
+  pkg_session_title_first_message_llm --> pkg_session_title_llm
   pkg_permission --> pkg_bash
   pkg_permission --> pkg_invariants
   pkg_permission --> pkg_sandbox
@@ -379,9 +404,9 @@ flowchart TD
   pkg_tool_goal --> pkg_tools
   pkg_tool_bash --> pkg_agent
   pkg_tool_bash --> pkg_bash
-  pkg_tool_bash --> pkg_home
   pkg_tool_bash --> pkg_invariants
   pkg_tool_bash --> pkg_llm
+  pkg_tool_bash --> pkg_paths
   pkg_tool_bash --> pkg_sandbox
   pkg_tool_bash --> pkg_sandbox_policy
   pkg_tool_bash --> pkg_session_persistence
@@ -463,6 +488,7 @@ flowchart TD
   pkg_acp --> pkg_sandbox
   pkg_acp --> pkg_session
   pkg_acp --> pkg_session_persistence
+  pkg_acp --> pkg_session_title
   pkg_acp --> pkg_system_prompt
   pkg_acp --> pkg_tools
   pkg_acp --> pkg_user_approval
@@ -542,6 +568,7 @@ flowchart TD
   pkg_tui --> pkg_llm
   pkg_tui --> pkg_llm_retry
   pkg_tui --> pkg_session
+  pkg_tui --> pkg_session_title
   pkg_tui --> pkg_system_prompt
   pkg_tui --> pkg_token_meter
   pkg_tui --> pkg_tools
@@ -550,12 +577,13 @@ flowchart TD
   pkg_agent_spine_demo --> pkg_agent_loop
   pkg_agent_spine_demo --> pkg_goal
   pkg_agent_spine_demo --> pkg_goal_session
-  pkg_agent_spine_demo --> pkg_home
   pkg_agent_spine_demo --> pkg_invariants
   pkg_agent_spine_demo --> pkg_llm
   pkg_agent_spine_demo --> pkg_llm_retry
+  pkg_agent_spine_demo --> pkg_paths
   pkg_agent_spine_demo --> pkg_scope
   pkg_agent_spine_demo --> pkg_session
+  pkg_agent_spine_demo --> pkg_session_title
   pkg_agent_spine_demo --> pkg_skill
   pkg_agent_spine_demo --> pkg_skill_local
   pkg_agent_spine_demo --> pkg_system_prompt
@@ -629,7 +657,6 @@ flowchart TD
 | --- | --- | --- |
 | [`invariants`](../packages/support/invariants) | `support` | — |
 | [`brand`](../packages/util/brand) | `util` | [`invariants`](../packages/support/invariants) |
-| [`home`](../packages/util/home) | `util` | [`invariants`](../packages/support/invariants) |
 | [`paths`](../packages/util/paths) | `util` | [`invariants`](../packages/support/invariants) |
 | [`retention`](../packages/util/retention) | `util` | [`invariants`](../packages/support/invariants) |
 | [`timeout`](../packages/util/timeout) | `util` | [`invariants`](../packages/support/invariants) |
@@ -645,7 +672,7 @@ flowchart TD
 | [`code-runtime-worker`](../packages/code-runtime/code-runtime-worker) | `code-runtime` | [`code-runtime`](../packages/code-runtime/code-runtime), [`invariants`](../packages/support/invariants) |
 | [`helper`](../packages/sdk/helper) | `sdk` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants) |
 | [`scripts`](../packages/sdk/scripts) | `sdk` | [`app-boot`](../packages/ui/app-boot), [`invariants`](../packages/support/invariants) |
-| [`telemetry`](../packages/sdk/telemetry) | `sdk` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants) |
+| [`telemetry`](../packages/sdk/telemetry) | `sdk` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`paths`](../packages/util/paths) |
 | [`llm-deepseek`](../packages/llm/llm-deepseek) | `llm` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`timeout`](../packages/util/timeout) |
 | [`llm-pi-ai`](../packages/llm/llm-pi-ai) | `llm` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`timeout`](../packages/util/timeout) |
 | [`session`](../packages/core/session) | `core` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`scope`](../packages/core/scope) |
@@ -665,6 +692,7 @@ flowchart TD
 | [`web-search-perplexity`](../packages/web/web-search-perplexity) | `web` | [`invariants`](../packages/support/invariants), [`web`](../packages/web/web) |
 | [`spill`](../packages/spill/spill) | `spill` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`session-persistence`](../packages/session-persistence/session-persistence) | `session-persistence` | [`invariants`](../packages/support/invariants), [`session`](../packages/core/session) |
+| [`session-title`](../packages/session-title/session-title) | `session-title` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`llm-replay`](../packages/support/llm-replay) | `support` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`lsp-local`](../packages/lsp/lsp-local) | `lsp` | [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`lsp`](../packages/lsp/lsp), [`timeout`](../packages/util/timeout) |
 | [`sandbox-local`](../packages/sandbox/sandbox-local) | `sandbox` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox) |
@@ -674,13 +702,14 @@ flowchart TD
 | [`bash-local`](../packages/bash/bash-local) | `bash` | [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`timeout`](../packages/util/timeout) |
 | [`fs-local`](../packages/fs/fs-local) | `fs` | [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants) |
 | [`fs-policy`](../packages/fs/fs-policy) | `fs` | [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants) |
-| [`skill-local`](../packages/skill/skill-local) | `skill` | [`fs`](../packages/fs/fs), [`home`](../packages/util/home), [`invariants`](../packages/support/invariants), [`skill`](../packages/skill/skill) |
+| [`skill-local`](../packages/skill/skill-local) | `skill` | [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants), [`paths`](../packages/util/paths), [`skill`](../packages/skill/skill) |
 | [`compact-basic`](../packages/compact/compact-basic) | `compact` | [`agent`](../packages/core/agent), [`compact`](../packages/compact/compact), [`compact-tool-result-prune`](../packages/compact/compact-tool-result-prune), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`token-meter`](../packages/llm/token-meter) |
 | [`spill-local`](../packages/spill/spill-local) | `spill` | [`invariants`](../packages/support/invariants), [`spill`](../packages/spill/spill) |
 | [`hook-protocol`](../packages/hooks/hook-protocol) | `hooks` | [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session) |
 | [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl) | `session-persistence` | [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence) |
 | [`session-persistence-sqlite`](../packages/session-persistence/session-persistence-sqlite) | `session-persistence` | [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence) |
-| [`session-query`](../packages/session-query/session-query) | `session-query` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence) |
+| [`session-query`](../packages/session-query/session-query) | `session-query` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title) |
+| [`session-title-llm`](../packages/session-title/session-title-llm) | `session-title` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`timeout`](../packages/util/timeout) |
 | [`commands`](../packages/ui/commands) | `ui` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`scope`](../packages/core/scope) |
 | [`user-approval`](../packages/ui/user-approval) | `ui` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`system-prompt`](../packages/core/system-prompt) |
 | [`user-interaction`](../packages/ui/user-interaction) | `ui` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm) |
@@ -692,10 +721,12 @@ flowchart TD
 | [`goal-session`](../packages/goal/goal-session) | `goal` | [`agent`](../packages/core/agent), [`goal`](../packages/goal/goal), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`bash-sandbox`](../packages/bash/bash-sandbox) | `bash` | [`bash`](../packages/bash/bash), [`bash-local`](../packages/bash/bash-local), [`invariants`](../packages/support/invariants), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy) |
 | [`fs-sandbox`](../packages/fs/fs-sandbox) | `fs` | [`fs`](../packages/fs/fs), [`fs-local`](../packages/fs/fs-local), [`invariants`](../packages/support/invariants), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy) |
+| [`session-title-all-messages-llm`](../packages/session-title/session-title-all-messages-llm) | `session-title` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`session-title-llm`](../packages/session-title/session-title-llm) |
+| [`session-title-first-message-llm`](../packages/session-title/session-title-first-message-llm) | `session-title` | [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`session-title-llm`](../packages/session-title/session-title-llm) |
 | [`permission`](../packages/ui/permission) | `ui` | [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`session`](../packages/core/session), [`user-approval`](../packages/ui/user-approval) |
 | [`agent-loop`](../packages/core/agent-loop) | `core` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools) |
 | [`tool-goal`](../packages/goal/tool-goal) | `goal` | [`agent`](../packages/core/agent), [`goal`](../packages/goal/goal), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools) |
-| [`tool-bash`](../packages/bash/tool-bash) | `bash` | [`agent`](../packages/core/agent), [`bash`](../packages/bash/bash), [`home`](../packages/util/home), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`session-persistence`](../packages/session-persistence/session-persistence), [`system-prompt`](../packages/core/system-prompt), [`tasks`](../packages/tasks/tasks), [`tools`](../packages/core/tools), [`user-approval`](../packages/ui/user-approval) |
+| [`tool-bash`](../packages/bash/tool-bash) | `bash` | [`agent`](../packages/core/agent), [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`paths`](../packages/util/paths), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`session-persistence`](../packages/session-persistence/session-persistence), [`system-prompt`](../packages/core/system-prompt), [`tasks`](../packages/tasks/tasks), [`tools`](../packages/core/tools), [`user-approval`](../packages/ui/user-approval) |
 | [`tool-fs`](../packages/fs/tool-fs) | `fs` | [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`session`](../packages/core/session), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/ui/user-approval) |
 | [`tool-fs-search`](../packages/fs/tool-fs-search) | `fs` | [`bash`](../packages/bash/bash), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`retention`](../packages/util/retention), [`session`](../packages/core/session), [`spill`](../packages/spill/spill), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools) |
 | [`tool-skill`](../packages/skill/tool-skill) | `skill` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`skill`](../packages/skill/skill), [`tools`](../packages/core/tools) |
@@ -707,7 +738,7 @@ flowchart TD
 | [`tool-cordis`](../packages/cordis/tool-cordis) | `cordis` | [`invariants`](../packages/support/invariants), [`scope`](../packages/core/scope), [`tools`](../packages/core/tools) |
 | [`hooks-codex`](../packages/hooks/hooks-codex) | `hooks` | [`agent`](../packages/core/agent), [`hook-protocol`](../packages/hooks/hook-protocol), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`tools`](../packages/core/tools) |
 | [`agent-loop-testkit`](../packages/support/agent-loop-testkit) | `support` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools) |
-| [`acp`](../packages/ui/acp) | `ui` | [`agent`](../packages/core/agent), [`bash`](../packages/bash/bash), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`permission`](../packages/ui/permission), [`sandbox`](../packages/sandbox/sandbox), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/ui/user-approval), [`user-interaction`](../packages/ui/user-interaction) |
+| [`acp`](../packages/ui/acp) | `ui` | [`agent`](../packages/core/agent), [`bash`](../packages/bash/bash), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`permission`](../packages/ui/permission), [`sandbox`](../packages/sandbox/sandbox), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-title`](../packages/session-title/session-title), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/ui/user-approval), [`user-interaction`](../packages/ui/user-interaction) |
 | [`tool-ask-user`](../packages/ui/tool-ask-user) | `ui` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`tools`](../packages/core/tools), [`user-interaction`](../packages/ui/user-interaction) |
 | [`workspace-context`](../packages/context/workspace-context) | `context` | [`agent`](../packages/core/agent), [`fs`](../packages/fs/fs), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`paths`](../packages/util/paths), [`session`](../packages/core/session), [`tools`](../packages/core/tools) |
 | [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) | `guard` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`tools`](../packages/core/tools) |
@@ -720,8 +751,8 @@ flowchart TD
 | [`tool-subagent`](../packages/subagent/tool-subagent) | `subagent` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`subagent`](../packages/subagent/subagent), [`tasks`](../packages/tasks/tasks), [`tools`](../packages/core/tools) |
 | [`hooks-claude`](../packages/hooks/hooks-claude) | `hooks` | [`agent`](../packages/core/agent), [`hook-protocol`](../packages/hooks/hook-protocol), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`session-persistence`](../packages/session-persistence/session-persistence), [`subagent`](../packages/subagent/subagent), [`tools`](../packages/core/tools) |
 | [`jsonrpc`](../packages/ui/jsonrpc) | `ui` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-deepseek`](../packages/llm/llm-deepseek), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent) |
-| [`tui`](../packages/ui/tui) | `ui` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`session`](../packages/core/session), [`system-prompt`](../packages/core/system-prompt), [`token-meter`](../packages/llm/token-meter), [`tools`](../packages/core/tools), [`user-interaction`](../packages/ui/user-interaction) |
+| [`tui`](../packages/ui/tui) | `ui` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`commands`](../packages/ui/commands), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`system-prompt`](../packages/core/system-prompt), [`token-meter`](../packages/llm/token-meter), [`tools`](../packages/core/tools), [`user-interaction`](../packages/ui/user-interaction) |
-| [`agent-spine-demo`](../packages/examples/agent-spine-demo) | `examples` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`home`](../packages/util/home), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`skill`](../packages/skill/skill), [`skill-local`](../packages/skill/skill-local), [`system-prompt`](../packages/core/system-prompt), [`tasks`](../packages/tasks/tasks), [`tool-bash`](../packages/bash/tool-bash), [`tool-goal`](../packages/goal/tool-goal), [`tool-skill`](../packages/skill/tool-skill), [`tool-tasks`](../packages/tasks/tool-tasks), [`tools`](../packages/core/tools), [`workspace-context`](../packages/context/workspace-context) |
+| [`agent-spine-demo`](../packages/examples/agent-spine-demo) | `examples` | [`agent`](../packages/core/agent), [`agent-loop`](../packages/core/agent-loop), [`goal`](../packages/goal/goal), [`goal-session`](../packages/goal/goal-session), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`llm-retry`](../packages/llm/llm-retry), [`paths`](../packages/util/paths), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`session-title`](../packages/session-title/session-title), [`skill`](../packages/skill/skill), [`skill-local`](../packages/skill/skill-local), [`system-prompt`](../packages/core/system-prompt), [`tasks`](../packages/tasks/tasks), [`tool-bash`](../packages/bash/tool-bash), [`tool-goal`](../packages/goal/tool-goal), [`tool-skill`](../packages/skill/tool-skill), [`tool-tasks`](../packages/tasks/tool-tasks), [`tools`](../packages/core/tools), [`workspace-context`](../packages/context/workspace-context) |
 | [`tool-ralph`](../packages/workflow/tool-ralph) | `workflow` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`subagent`](../packages/subagent/subagent), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`workflow-workerthread`](../packages/workflow/workflow-workerthread) | `workflow` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/support/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`subagent-fork`](../packages/subagent/subagent-fork) | `subagent` | [`agent`](../packages/core/agent), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |

docs/persistence-catalog.md

@@ -79,7 +79,7 @@ export type SessionEvent<T extends SessionEventType = SessionEventType> = {
 }[T]
 ```
 
-Sources: [`packages/core/session/src/types.ts:268`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:275`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:305`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:337`](../packages/core/session/src/types.ts)
+Sources: [`packages/core/session/src/types.ts:276`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:289`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:319`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:351`](../packages/core/session/src/types.ts)
 
 ## Events
 
@@ -376,6 +376,33 @@ Source: [`packages/core/session/src/types.ts:264`](../packages/core/session/src/
 
 Source: [`packages/sandbox/sandbox-policy/src/session-mode.ts:34`](../packages/sandbox/sandbox-policy/src/session-mode.ts)
 
+### `session/*`
+
+#### `session/title` — log-only
+
+```ts persistence-catalog
+/**
+ * Latest-wins session title snapshot. Log-only: it never enters the model
+ * surface or derived history.
+ */
+'session/title': SessionTitleEventData
+```
+
+Types: [SessionTitleEventData](core-data-structures/session-title.md)
+
+Source: [`packages/session-title/session-title/src/index.ts:95`](../packages/session-title/session-title/src/index.ts)
+
+#### `session/title-llm-request` — log-only
+
+```ts persistence-catalog
+/** Log-only pre-dispatch record of one session-title model request. */
+'session/title-llm-request': SessionTitleLlmRequestEventData
+```
+
+Types: [SessionTitleLlmRequestEventData](core-data-structures/session-title.md)
+
+Source: [`packages/session-title/session-title-llm/src/index.ts:44`](../packages/session-title/session-title-llm/src/index.ts)
+
 ### `steering/*`
 
 #### `steering/message` — surface

examples/acp-agent/tests/acp.snapshot.ts

@@ -70,7 +70,12 @@ const SCENARIOS: Scenario[] = [
   { name: 'todo-plan', hasModelTurn: true, recorded: true },
   { name: 'skill-load', hasModelTurn: true, recorded: false, pinsHeader: true, headerClass: 'skill' },
   { name: 'lsp-definition', hasModelTurn: true, recorded: false, pinsHeader: true, headerClass: 'lsp', configPath: LSP_CONFIG },
-  { name: 'workspace-edit', hasModelTurn: true, recorded: true },
+  {
+    name: 'workspace-edit',
+    hasModelTurn: true,
+    recorded: true,
+    pinsNativeWindowsStdout: true,
+  },
   { name: 'fs-read', hasModelTurn: true, recorded: true },
   { name: 'fs-write', hasModelTurn: true, recorded: true },
   { name: 'fs-edit', hasModelTurn: true, recorded: true },
@@ -109,7 +114,9 @@ const SCENARIOS: Scenario[] = [
     configPath: WORKSPACE_CONTEXT_CONFIG,
   },
   { name: 'cancel', hasModelTurn: true, recorded: false, overridden: true },
-  { name: 'cancel-tool-calls', hasModelTurn: true, recorded: false, overridden: true },
+  // Cancelling a live bash call relies on POSIX process-group termination;
+  // Windows bash process-tree kill is deferred with the Bash execution domain.
+  { name: 'cancel-tool-calls', hasModelTurn: true, recorded: false, overridden: true, posixOnly: true },
   { name: 'subagent-spawn', hasModelTurn: true, recorded: true },
   { name: 'subagent-multi', hasModelTurn: true, recorded: true },
   { name: 'subagent-fork', hasModelTurn: true, recorded: true },

examples/acp-agent/tests/goal-snapshots/goal-session/session.expected.jsonl

@@ -1,53 +1,54 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
 {"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
 {"type":"user/message","seq":1,"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"}},"surfaceOp":"append"}
-{"type":"step/start","seq":2,"time":0,"data":{"turn":1,"step":1}}
+{"type":"session/title","seq":2,"time":0,"data":{"title":"Create a durable two-round goal","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":3,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"assistant/chunk","seq":4,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"request/header","seq":4,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":5,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_create","name":"create_goal","argumentsDelta":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}}}
+{"type":"assistant/chunk","seq":5,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":6,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}}}}
+{"type":"assistant/chunk","seq":6,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_create","name":"create_goal","argumentsDelta":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}}}
-{"type":"assistant/chunk","seq":7,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":8}}}}
+{"type":"assistant/chunk","seq":7,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}}}}
-{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":8}}}}
-{"type":"assistant/message","seq":9,"time":0,"data":{"turn":1,"step":1,"content":[{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":20,"outputTokens":8}},"sourceEventSeqs":[4,5,6,7,8],"surfaceOp":"append"}
+{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"tool/call","seq":10,"time":0,"data":{"turn":1,"step":1,"callId":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}}
+{"type":"assistant/message","seq":10,"time":0,"data":{"turn":1,"step":1,"content":[{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":20,"outputTokens":8}},"sourceEventSeqs":[5,6,7,8,9],"surfaceOp":"append"}
-{"type":"tool/result","seq":11,"time":0,"data":{"turn":1,"step":1,"callId":"call_goal_create","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}],"isError":false},"sourceEventSeqs":[10],"surfaceOp":"append"}
+{"type":"tool/call","seq":11,"time":0,"data":{"turn":1,"step":1,"callId":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-session snapshot proof\",\"max_goal_rounds\":2}"}}
-{"type":"context/message","seq":12,"time":0,"data":{"content":[{"type":"text","text":"<goal_state>{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"maxGoalRounds\":2},\"roundsStarted\":0,\"createdAt\":0,\"updatedAt\":0}</goal_state>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":0},"meta":{"kind":"goal/change","version":1,"operation":"create","goal":{"id":"goal-{{sessionId}}","revision":1,"objective":"Finish the ACP goal-session snapshot proof","phase":"active","maxGoalRounds":2},"roundsStarted":0,"createdAt":0,"updatedAt":0}},"surfaceOp":"append"}
+{"type":"tool/result","seq":12,"time":0,"data":{"turn":1,"step":1,"callId":"call_goal_create","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}],"isError":false},"sourceEventSeqs":[11],"surfaceOp":"append"}
-{"type":"step/end","seq":13,"time":0,"data":{"turn":1,"step":1}}
+{"type":"context/message","seq":13,"time":0,"data":{"content":[{"type":"text","text":"<goal_state>{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"maxGoalRounds\":2},\"roundsStarted\":0,\"createdAt\":0,\"updatedAt\":0}</goal_state>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":0},"meta":{"kind":"goal/change","version":1,"operation":"create","goal":{"id":"goal-{{sessionId}}","revision":1,"objective":"Finish the ACP goal-session snapshot proof","phase":"active","maxGoalRounds":2},"roundsStarted":0,"createdAt":0,"updatedAt":0}},"surfaceOp":"append"}
-{"type":"step/start","seq":14,"time":0,"data":{"turn":1,"step":2}}
+{"type":"step/end","seq":14,"time":0,"data":{"turn":1,"step":1}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"step/start","seq":15,"time":0,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_get","name":"get_goal","argumentsDelta":"{}"}}}
+{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_get","name":"get_goal","arguments":"{}"}}}}
+{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_get","name":"get_goal","argumentsDelta":"{}"}}}
-{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":4}}}}
+{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_get","name":"get_goal","arguments":"{}"}}}}
-{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":4}}}}
-{"type":"assistant/message","seq":20,"time":0,"data":{"turn":1,"step":2,"content":[{"type":"tool-call","id":"call_goal_get","name":"get_goal","arguments":"{}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":30,"outputTokens":4}},"sourceEventSeqs":[15,16,17,18,19],"surfaceOp":"append"}
+{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"tool/call","seq":21,"time":0,"data":{"turn":1,"step":2,"callId":"call_goal_get","name":"get_goal","arguments":"{}"}}
+{"type":"assistant/message","seq":21,"time":0,"data":{"turn":1,"step":2,"content":[{"type":"tool-call","id":"call_goal_get","name":"get_goal","arguments":"{}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-flash"},"usage":{"inputTokens":30,"outputTokens":4}},"sourceEventSeqs":[16,17,18,19,20],"surfaceOp":"append"}
-{"type":"tool/result","seq":22,"time":0,"data":{"turn":1,"step":2,"callId":"call_goal_get","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-session snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}],"isError":false},"sourceEventSeqs":[21],"surfaceOp":"append"}
+{"type":"tool/call","seq":22,"time":0,"data":{"turn":1,"step":2,"callId":"call_goal_get","name":"get_goal","arguments":"{}"}}
-{"type":"step/end","seq":23,"time":0,"data":{"turn":1,"step":2}}
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examples/acp-agent/tests/goal-snapshots/goal-session/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl

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examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl

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examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl

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examples/acp-agent/tests/snapshots/advanced-toolchain/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/bash-spill/session.jsonl

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examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl

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examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl

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examples/acp-agent/tests/snapshots/cancel/session.jsonl

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examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl

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examples/acp-agent/tests/snapshots/code-mode-workspace-context/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/error-finish/session.jsonl

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examples/acp-agent/tests/snapshots/error-finish/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl

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examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl

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examples/acp-agent/tests/snapshots/escalation-rejected/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/fs-edit/session.jsonl

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examples/acp-agent/tests/snapshots/fs-edit/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl

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examples/acp-agent/tests/snapshots/fs-policy-reject/stdout.expected.jsonl

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examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl

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