Merge pull request #1103 from deepseek-harness/feature/session-export-command

feat(session-export): add /export command and Web UI
2026-08-12 20:36:19 +08:00
parent a995fc2706 648dc66e50
commit e7dbf6b9cf
125 changed files with 1653 additions and 391 deletions
@@ -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 .agents/notes/implemented/feature/2026-08-10-telemetry-default-off.md
-2026-08-10-telemetry-default-off.md: 4bda346c2b05a94106eb5658c3ee558a4b32407f
-2026-08-10-telemetry-default-off.zh.md: 706f2c18fbbf226e0357fa99bf3fd61c39fce08a
+2026-08-10-telemetry-default-off.md: 8163079eb5f8d6170e329c164141364681030793
+2026-08-10-telemetry-default-off.zh.md: c8e16f84248bde5bdc2c1d4bdb814f0d80fcf77e
@@ -12,7 +12,7 @@ DeepSeek Harness has two outbound telemetry feeds. During internal testing, the

 Both feeds use `DSH_TELEMETRY_MODE` as their positive consent setting. Unset and empty values resolve to `DISABLED`. `@deepseek-ai/dsh-session-telemetry-otel` also resolves an omitted `mode` to `DISABLED`, which constructs no OTel provider, processor, or exporter and leaves feedback in the local session log. The shared dsh base keeps the backend row mounted so disabled feedback can still explain that nothing was shared. A deployment opts into Session Log sharing through `FULL` or `FEEDBACK_ONLY`; only `FULL` also permits dsh-sdk launcher reporting. Any non-empty `DSH_TELEMETRY_DISABLED` remains an authoritative pre-load hard opt-out. The [default-mount decision](2026-07-31-web-telemetry-default-mount.md) continues to own the endpoint, batching cadence, and exit-drain settings.

-The dsh-sdk launcher reads the same variable without parsing `cordis.yml` or booting Cordis. `FULL` permits reporting; `FEEDBACK_ONLY`, `DISABLED`, unset, and empty values deny it. Consent is frozen from the launching environment before the command runs, because `dsh-sdk start` loads a project `.env` and project code can mutate `process.env`: resolving afterwards would let a project grant reporting of its own configuration, which the [configuration source ownership decision](../architecture/2026-08-04-configuration-source-ownership.md) denies for the whole `DSH_*` namespace. An unsupported mode denies rather than throwing at that boundary, since telemetry may never change a command's result. This rule supersedes only the default-on launcher consent in the [SDK follow-up proposal](../../proposed/feature/2026-07-17-sdk-follow-up-capabilities.md); its other capabilities remain proposed.
+The dsh-sdk launcher reads the same variable without parsing `cordis.yml` or booting Cordis. `FULL` permits reporting; `FEEDBACK_ONLY`, `DISABLED`, unset, and empty values deny it. Consent is frozen from the launching environment before the command runs, because `dsh-sdk start` loads a project `.env` and project code can mutate `process.env`: resolving afterwards would let a project grant reporting of its own configuration, which the [configuration source ownership decision](../architecture/2026-08-04-configuration-source-ownership.md) denies for the whole `DSH_*` namespace. An unsupported mode denies rather than throwing at that boundary, since telemetry may never change a command's result. Telemetry consent is owned here; no SDK project configuration or toolchain may opt in on the launching environment's behalf.

 The versioned Web welcome notice states that Session Log upload is off by default, names `DSH_TELEMETRY_MODE=FEEDBACK_ONLY` and `DSH_TELEMETRY_MODE=FULL` as the two opt-in choices, and discloses that `FULL` also enables dsh-sdk command telemetry. Its version changes with that material privacy statement so every profile acknowledges the current copy.

@@ -12,7 +12,7 @@ DeepSeek Harness 有两路出站遥测数据流。在内测阶段，共享基础

 两路数据流都使用 `DSH_TELEMETRY_MODE` 作为正向授权配置。未设置和空值都解析为 `DISABLED`。`@deepseek-ai/dsh-session-telemetry-otel` 也将省略的 `mode` 解析为 `DISABLED`；该模式不构造 OTel 提供方、处理器或导出器，并将反馈留在本地会话日志中。dsh 共享基础配置继续挂载后端配置行，使禁用模式仍可在记录反馈时说明没有共享任何内容。部署方通过 `FULL` 或 `FEEDBACK_ONLY` 显式启用 Session Log 共享；只有 `FULL` 还允许 dsh-sdk 启动器上报。任何非空 `DSH_TELEMETRY_DISABLED` 仍是具有最高优先级的加载前硬性退出开关。[默认挂载决策](2026-07-31-web-telemetry-default-mount.md)继续负责 endpoint、批处理节奏和退出排空设置。

-dsh-sdk 启动器读取同一变量，不解析 `cordis.yml`，也不启动 Cordis。`FULL` 允许上报；`FEEDBACK_ONLY`、`DISABLED`、未设置和空值都会拒绝。授权在命令执行前从启动环境冻结：`dsh-sdk start` 会加载项目 `.env`，项目代码也能修改 `process.env`，若在执行后解析，项目便能自行授权上报其自身配置，而[配置来源所有权决策](../architecture/2026-08-04-configuration-source-ownership.md)对整个 `DSH_*` 命名空间禁止这种行为。在该边界上，不受支持的模式按拒绝处理而非抛出，因为遥测不得改变命令结果。此规则仅取代 [SDK 后续功能提案](../../proposed/feature/2026-07-17-sdk-follow-up-capabilities.md)中启动器默认允许上报的规则；其余能力仍处于提案状态。
+dsh-sdk 启动器读取同一变量，不解析 `cordis.yml`，也不启动 Cordis。`FULL` 允许上报；`FEEDBACK_ONLY`、`DISABLED`、未设置和空值都会拒绝。授权在命令执行前从启动环境冻结：`dsh-sdk start` 会加载项目 `.env`，项目代码也能修改 `process.env`，若在执行后解析，项目便能自行授权上报其自身配置，而[配置来源所有权决策](../architecture/2026-08-04-configuration-source-ownership.md)对整个 `DSH_*` 命名空间禁止这种行为。在该边界上，不受支持的模式按拒绝处理而非抛出，因为遥测不得改变命令结果。遥测授权由本说明持有；SDK 项目配置或工具链不得代替启动环境显式启用遥测。

 带版本的 Web 欢迎通知说明会话日志上传默认关闭，将 `DSH_TELEMETRY_MODE=FEEDBACK_ONLY` 和 `DSH_TELEMETRY_MODE=FULL` 列为两种显式启用选项，并披露 `FULL` 同时会启用 dsh-sdk 命令遥测。其版本随这项重要的隐私声明一同变更，使每个 profile 都确认当前文案。

@@ -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 .agents/notes/implemented/feature/2026-08-10-web-session-log-export.md
-2026-08-10-web-session-log-export.md: 8fa62b877df1be55de2c373d4281672881dc2b9d
-2026-08-10-web-session-log-export.zh.md: 3040dda992492187245bfe92d29bc0812ef01ef2
+2026-08-10-web-session-log-export.md: 24703bd5c98a91bf8708ae243ef7a44df4afb8f1
+2026-08-10-web-session-log-export.zh.md: 36e008586ad8e93be9a6e6d590d0e21388d99913
@@ -12,8 +12,8 @@ The Trajectory view had no way to hand a debugging artifact to a human: the raw

 - **The export is a host-only download, not an RPC**: `GET /api/session.export?sessionId=…&includeDescendants=true` streams one ZIP attachment. Every file is a session's **stored artifact text verbatim**: `readRaw` on the persistence service reads the backend's own durable bytes (the JSONL backend decodes its physical zstd frames, or returns plaintext) — never a reconstruction from parsed events, so packed-chunk rows, key order, and line breaks survive byte-for-byte — under its original base name (`session.jsonl` at the root, `subagents/<id>/session.jsonl` for descendants). Compression runs on the host with fflate's streaming `Zip`/`ZipDeflate` API at validated `sessionExportCompressionLevel` 0–9 (default 6), letting deployments trade CPU and latency against archive size; each entry is deflated in bounded chunks as it is produced, so the response is chunked as it is generated and the host never holds the whole archive in one buffer (at most one descendant's artifact text beyond the preloaded root). At the 64 KiB response byte high-water mark, production waits for consumer pull to restore capacity; fflate's synchronous callback can add at most one bounded input push beyond that queue bound. No manifest is written — every file is byte-identical to the durable artifact and self-describing through its own header line.
 - **Error vocabulary is HTTP-native**: missing services → 500, a backend without per-session raw artifacts → 501, missing root session → 404 (all decided before any byte streams), and a descendant without a stored artifact → the stream errors (fail-loud, never silent under-export). Request abort remains cancellation instead of being rewritten as 500; request and response-consumer cancellation converge on the producer signal, which reaches lineage, persistence, and attachment reads and terminates the active compressor. The carrier (`toFetchHandler`) already applies the `/api` trust fence; the GET branch sits beside the existing SSE GET routes, and `ApiProxy.downloads.sessionLog` (host-only, no wire envelope, absent from `IApiClient`) implements it.
- **The UI just downloads**: the 导出 button hands the endpoint directly to the browser's native download manager, so JavaScript neither fetches nor buffers the ZIP; the `session.log` RPC that an earlier iteration shipped was removed — the download endpoint is its only consumer, and the repo rule is no public interface without a current owner. The client bundle carries no archive implementation.
- The 导出 button lives in the Trajectory toolbar; the plugin exposes `exportLog` through the view's inject face (components never touch ctx) and resolves the view tab label through the locale service (`轨迹` in Chinese, `Trajectory` in English). In-flight state disables the button during the handoff; a synchronous browser-handoff failure surfaces in a visible alert bar, while HTTP delivery is owned and reported by the browser.
+- **The UI just downloads**: browser consumers may issue a bodyless `HEAD` preflight for preparation errors, then hand the GET endpoint to the browser's native download manager, so JavaScript never buffers the ZIP. The `session.log` RPC that an earlier iteration shipped was removed — the download endpoint is its only consumer, and the repo rule is no public interface without a current owner. The client bundle carries no archive implementation.
+- The current Header and `/export` consumers are defined by the [Web export command and dialog decision](2026-08-11-web-export-command-and-dialog.md).

 ## Alternatives considered

@@ -12,8 +12,8 @@ Trajectory 视图没有任何方式把调试工件交到人手里：原始会话

 - **导出是宿主侧的下载面，不是 RPC**：`GET /api/session.export?sessionId=…&includeDescendants=true` 流式返回一个 ZIP 附件。每个文件都是会话**存储工件的逐字原文**：持久化服务新增的 `readRaw` 读取后端自己的持久化字节（jsonl 后端解码其物理 zstd 帧，或直接返回明文）——绝非从解析后事件重建，因此 chunk 打包、键序、换行全部逐字节保留——放在其原始基础文件名下（根为 `session.jsonl`，子代理为 `subagents/<id>/session.jsonl`）。压缩在宿主侧使用 fflate 流式 `Zip`/`ZipDeflate` API 和已验证的 `sessionExportCompressionLevel` 0–9（默认 6），使部署可以在 CPU／延迟与归档大小之间取舍；每个条目按有界分块边产出边压缩，响应随生成分块写出，宿主从不把整个归档放进单个缓冲区（除预载的根外，最多同时持有一条后代的工件文本）。到达 64 KiB 响应字节高水位后，生产会等待 Consumer pull 恢复容量；fflate 的同步回调最多只会在该队列界限外再增加一次有界输入 push。不写清单——每个文件都与持久化工件逐字节一致，并通过自身 header 行自描述。
 - **错误词汇是 HTTP 原生的**：服务缺失 → 500，后端不提供每会话原始工件 → 501，根会话缺失 → 404（三者都在任何字节流出前判定），后代缺少存储工件 → 流失败（fail-loud，绝不静默少导出）。请求中止会保持取消语义而不会改写成 500；请求取消与响应 Consumer 取消汇合到生产者 signal，该 signal 会传到血缘、持久化与附件读取，并终止活跃压缩器。载体（`toFetchHandler`）已对 `/api` 应用信任围栏；GET 分支与既有 SSE GET 路由并列，由 `ApiProxy.downloads.sessionLog`（host-only、无 wire 信封、不在 `IApiClient` 上）实现。
- **UI 只负责下载**：「导出」按钮将端点直接交给浏览器原生下载管理器，因此 JavaScript 既不会 fetch 也不会缓冲 ZIP；早先迭代发布的 `session.log` RPC 已删除——下载端点是它唯一的消费者，仓库规则是不留无当前所有者的公共接口。客户端 bundle 不包含任何归档实现。
- 「导出」按钮位于 Trajectory 工具栏；插件通过视图的 inject face 暴露 `exportLog`（组件从不接触 ctx），并通过 locale 服务解析视图标签页标题（中文「轨迹」、英文 "Trajectory"）。进行中状态会在交接期间禁用按钮；同步的浏览器交接失败会在可见警示条中显示，而 HTTP 交付由浏览器负责并报告。
+- **UI 只负责下载**：浏览器 Consumer 可以先发出不读取 body 的 `HEAD` 预检以取得准备阶段错误，再把 GET 端点交给浏览器原生下载管理器，因此 JavaScript 不会缓冲 ZIP。早先迭代发布的 `session.log` RPC 已删除——下载端点是它唯一的消费者，仓库规则是不留无当前所有者的公共接口。客户端 bundle 不包含任何归档实现。
+- 当前 Header 与 `/export` Consumer 由 [Web 导出命令与弹窗决策](2026-08-11-web-export-command-and-dialog.md)定义。

 ## 考虑过的替代方案

@@ -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 .agents/notes/implemented/feature/2026-08-11-web-export-command-and-dialog.md
+2026-08-11-web-export-command-and-dialog.md: 385fc05f42af329e59d0989d5f4b2145a637db11
+2026-08-11-web-export-command-and-dialog.zh.md: a86c003211a83c90a264ab5f17c4357c8da3ccb3
@@ -0,0 +1,31 @@
+# Agent Note: Web `/export` shares the streamed Session ZIP download
+
+Status: implemented
+
+English | [中文](2026-08-11-web-export-command-and-dialog.zh.md)
+
+## Problem
+
+Session export needs a stable Session-level visible action and an equivalent slash-command path. A second backend reader or Host-path writer would duplicate the download implementation and introduce platform-specific file-permission and path-reveal problems.
+
+## Decision
+
+`@deepseek-ai/dsh-session-export` registers a Web-only `/export` human command and provides the browser `ctx.sessionExport` controller. The command records an ordinary `command/run` and `command/done`; after `command.execute` returns a successful result, `dsh-client-ui-command` emits a local acknowledgment that asks this browser's controller to download ApiProxy's existing `GET /api/session.export` ZIP. Other clients render the broadcast command nodes without repeating the browser side effect. The 111×32 `Session log` capsule in the Session Header calls that controller directly. Both paths use a `HEAD` preflight for preparation errors, then hand the GET URL to the browser download manager so JavaScript never buffers the ZIP; they share the same in-flight state and Modal.
+
+The Header contribution occupies the right-aligned `conversation.session.header.utilities` list and renders the `Session log` text capsule with its trailing download icon plus the shared Modal. The title-adjacent `conversation.session.header.actions` list continues to own mode, Subagent, and Task entries, so mounting Session export does not reorder or move them. The export contribution does not observe Session history. A per-Session controller collapses concurrent gestures, aborts active preflights when its plugin disposes, ignores late requests after disposal, and preserves a user's closed state when the request later completes.
+
+The ZIP endpoint and persistence `readRaw` capability remain owned by `dsh-host-apiproxy` and the persistence package. The endpoint flushes a live root Session before reading its artifact, so the local acknowledgment cannot race ahead of durable command lifecycle rows. This package does not serialize Session events, write Host files, deliver Host paths, or implement SQLite fallback.
+
+The package is an ordinary Client aggregate project. Its single `tsconfig.json` compiles the Node loader entries and browser contribution together; Host-side tests still exercise the command and invariant through their source entries.
+
+## Alternatives considered
+
+**Put the visible action in Trajectory.** Rejected because export is a Session-level operation and must remain discoverable without opening a diagnostic view.
+
+**Write a Host-side JSONL file from `/export`.** Rejected because it would diverge from the descendant-and-attachment ZIP, require Windows ACL handling, and return a Host path that may be meaningless to a remote browser.
+
+**Keep both Header and Trajectory buttons.** Rejected because two visible controls for the same Session operation create duplicate ownership and inconsistent placement.
+
+## Consequences
+
+The Header action and `/export` download the same ZIP and show the same feedback. An executed command remains visible in the durable transcript without creating a model turn. The preflight reports failures found before streaming starts; failures while the browser consumes the GET remain browser-download failures. Deployments whose persistence backend has no raw per-Session artifact receive the endpoint's existing failure; SQLite support remains separate work. Command availability before a Session's first turn is separate work.
@@ -0,0 +1,31 @@
+# Agent Note: Web `/export` 共用流式 Session ZIP 下载
+
+Status: implemented
+
+[English](2026-08-11-web-export-command-and-dialog.md) | 中文
+
+## Problem
+
+Session 导出需要一个稳定的 Session 级外显入口，以及语义等价的斜杠命令路径。第二套后端读取器或 Host 路径写入器会重复下载实现，并引入平台相关的文件权限和路径公开问题。
+
+## Decision
+
+`@deepseek-ai/dsh-session-export` 注册 Web 专用的 `/export` 用户命令，并提供浏览器 `ctx.sessionExport` 控制器。该命令记录普通的 `command/run` 和 `command/done`；`command.execute` 返回成功结果后，`dsh-client-ui-command` 会发布本地确认，请求当前浏览器的控制器下载 ApiProxy 现有的 `GET /api/session.export` ZIP。其他客户端会渲染广播的命令节点，但不会重复执行浏览器副作用。Session Header 中 111×32 的 `Session log` 胶囊按钮会直接调用该控制器。两种入口通过 `HEAD` 预检获得准备阶段错误，再把 GET URL 交给浏览器下载管理器，因此 JavaScript 不会缓冲 ZIP；两种入口共用进行中状态和 Modal。
+
+Header 贡献占用最右侧的 `conversation.session.header.utilities` 列表，渲染带尾部下载图标的 `Session log` 文字 capsule 和共享 Modal。标题旁的 `conversation.session.header.actions` 列表继续承载模式、Subagent 和 Task 配置项，挂载 Session export 不会改变它们的顺序或位置。导出贡献不观察 Session 历史。逐 Session 控制器会折叠并发操作，在插件释放时取消活动预检，忽略释放后的迟到请求，并在请求后来完成时保留用户已经关闭弹窗的状态。
+
+ZIP 端点与持久化 `readRaw` 能力仍由 `dsh-host-apiproxy` 和持久化包拥有。端点会在读取工件前 flush 活动的根 Session，因此本地确认不会早于持久命令生命周期行。本包不序列化 Session 事件、不写 Host 文件、不交付 Host 路径，也不实现 SQLite 回退。
+
+本包是普通的 Client 聚合项目。单一 `tsconfig.json` 会一起编译 Node loader 入口与浏览器贡献；Host 侧测试仍通过源码入口验证命令与 invariant。
+
+## Alternatives considered
+
+**把外显入口放进 Trajectory。** 不采用，因为导出是 Session 级操作，用户不应先打开诊断视图才能发现它。
+
+**让 `/export` 写入 Host 侧 JSONL 文件。** 不采用，因为这会偏离包含子 Session 与附件的 ZIP，需要处理 Windows ACL，并返回对远程浏览器可能没有意义的 Host 路径。
+
+**同时保留 Header 与 Trajectory 按钮。** 不采用，因为两个外显控件执行同一项 Session 操作，会形成重复归属和不一致的位置。
+
+## Consequences
+
+Header 操作与 `/export` 会下载同一个 ZIP，并显示相同反馈。已执行命令保留在持久文本记录中，且不创建模型轮次。预检会报告流式传输开始前发现的失败；浏览器消费 GET 时发生的失败仍属于浏览器下载失败。持久化后端没有逐 Session 原始工件时，用户会收到端点现有的失败；SQLite 支持保留为独立工作。Session 首轮前的命令可用性属于独立工作。
@@ -283,6 +283,7 @@ describe('web e2e: agent-preset selection', () => {
    expect(snapshot).toContain('Minimal mode')
    expect(snapshot).toContain('button "1 subagent"')
    expect(snapshot.indexOf('Minimal mode')).toBeLessThan(snapshot.indexOf('button "1 subagent"'))
+    expect(snapshot.indexOf('button "1 subagent"')).toBeLessThan(snapshot.indexOf('button "Session log"'))
    // Static chrome, not a control: the header can only report a composition
    // the host would refuse to change.
    expect(snapshot).not.toContain('button "Minimal mode"')
@@ -43,6 +43,7 @@ const PLUGINS: readonly (WebBootEntry & { bundlePath: string })[] = [
      '@deepseek-ai/dsh-client-ui-sidebar',
    ],
  },
+  { id: '@deepseek-ai/dsh-session-export', bundlePath: 'packages/session-query/session-export/lib/client.js', url: '/plugins/session-export.js', rev: 'fx', inject: ['@deepseek-ai/dsh-client-ui-command', '@deepseek-ai/dsh-client-ui-conversation'] },
  { id: '@deepseek-ai/dsh-client-ui-trajectory', bundlePath: 'packages/client/ui-trajectory/lib/client.js', url: '/plugins/ui-trajectory.js', rev: 'fx', inject: ['@deepseek-ai/dsh-client-ui-conversation'] },
 ]

@@ -52,6 +52,11 @@ async function assertBaselineSucceeded(response: Response, method: string): Prom
 }

 async function ensureSeedOpen(page: Page): Promise<void> {
+  const welcome = page.locator('[class*="onboardingOverlay"]')
+  if (await welcome.count() > 0) {
+    await welcome.getByRole('button').click()
+    await welcome.waitFor({ state: 'detached', timeout: 15_000 })
+  }
  const chat = page.getByRole('tab', { name: 'Chat', exact: true })
  // Search is a collapsed header action; expand it so the input is actionable.
  const searchButton = page.getByRole('button', { name: 'Search sessions' })
@@ -283,14 +288,30 @@ describe('web e2e: navigation & panes over a rich seeded session', () => {
    await details.getByRole('button', { name: 'Close details' }).click()
  }, 60_000)

-  it.skipIf(MODE === 'record')('downloads the session-log ZIP from the trajectory toolbar', async () => {
+  it.skipIf(MODE === 'record')('downloads through the Session Header and /export with one dialog', async () => {
    onTestFailed(() => saveFailureShot(page, 'web-e2e-navigation-export'))
    await ensureSeedOpen(page)
-    await page.getByRole('tab', { name: 'Trajectory' }).click()
+    const exportButton = page.getByRole('button', { name: 'Session log' })
+    expect(await exportButton.isDisabled()).toBe(false)
+    const header = exportButton.locator('xpath=ancestor::header[1]')
+    const [buttonBox, headerBox] = await Promise.all([
+      exportButton.boundingBox(), header.boundingBox(),
+    ])
+    if (buttonBox === null || headerBox === null) {
+      throw new Error('Session Header export geometry is unavailable')
+    }
+    expect(headerBox.x + headerBox.width - (buttonBox.x + buttonBox.width)).toBeLessThanOrEqual(32)
+    const responsePromise = page.waitForResponse(response =>
+      response.request().method() === 'HEAD'
+      && new URL(response.url()).pathname === '/api/session.export', { timeout: 30_000 })
    const downloadPromise = page.waitForEvent('download', { timeout: 30_000 })
-    await page.getByRole('button', { name: 'Export session log' }).click()
+    await exportButton.click()
+    const response = await responsePromise
+    expect(response.status()).toBe(200)
    const download = await downloadPromise
    expect(download.suggestedFilename()).toMatch(/^dsh-session-.+\.zip$/)
+    const dialog = page.getByRole('dialog', { name: 'Session download started' })
+    await dialog.waitFor({ timeout: 30_000 })
    // The real host streamed the ZIP; its root entry is the persisted log
    // text verbatim (the assembled seam: real route, real persistence read).
    const files = unzipSync(await readFile(await download.path()))
@@ -298,7 +319,63 @@ describe('web e2e: navigation & panes over a rich seeded session', () => {
    const content = strFromU8(files['session.jsonl'] as Uint8Array)
    expect(content.split('\n')[0]).toContain(SEED_ID)
    expect(content).toContain('FIRST_DONE')
-  }, 60_000)
+    await dialog.getByText('Close', { exact: true }).click()
+
+    const observer = await newEnglishPage(browser)
+    const observerTripwire = watchConsole(observer)
+    const observerSlotErrors: string[] = []
+    let observerDownloads = 0
+    observer.on('download', () => { observerDownloads += 1 })
+    observer.on('console', (message) => {
+      if (message.type() === 'error' && /slot entry crashed/i.test(message.text())) {
+        observerSlotErrors.push(message.text())
+      }
+    })
+    const observerSessionBaseline = baselineResponse(observer, 'session.list')
+    const observerWorkspaceBaseline = baselineResponse(observer, 'workspace.list')
+    const [, observerSessionResponse, observerWorkspaceResponse] = await Promise.all([
+      observer.goto(scaffold.baseUrl, { waitUntil: 'load' }),
+      observerSessionBaseline,
+      observerWorkspaceBaseline,
+    ])
+    await Promise.all([
+      assertBaselineSucceeded(observerSessionResponse, 'observer session.list'),
+      assertBaselineSucceeded(observerWorkspaceResponse, 'observer workspace.list'),
+    ])
+    await observer.getByText('Ungrouped', { exact: true }).waitFor({ timeout: 30_000 })
+    await ensureSeedOpen(observer)
+
+    try {
+      const input = page.locator('textarea').first()
+      const slashDownloadPromise = page.waitForEvent('download', { timeout: 30_000 })
+      await input.fill('/export')
+      await page.getByRole('option', { name: /export/u }).waitFor({ timeout: 10_000 })
+      await input.press('Enter')
+      const slashDownload = await slashDownloadPromise
+      expect(slashDownload.suggestedFilename()).toBe(download.suggestedFilename())
+      const slashFiles = unzipSync(await readFile(await slashDownload.path()))
+      const slashContent = strFromU8(slashFiles['session.jsonl'] as Uint8Array)
+      const slashEvents = parseSessionLog(slashContent)
+      const exportRun = slashEvents.findLast(event => event.type === 'command/run' && event.data.name === 'export')
+      if (exportRun?.type !== 'command/run') throw new Error('slash ZIP has no export command/run')
+      const exportDone = slashEvents.find(event =>
+        event.type === 'command/done' && event.data.commandId === exportRun.data.commandId)
+      expect(exportDone?.type).toBe('command/done')
+      await page.getByRole('dialog', { name: 'Session download started' }).waitFor({ timeout: 30_000 })
+      await page.getByRole('dialog', { name: 'Session download started' })
+        .getByText('Close', { exact: true }).click()
+      await observer.getByText('Session log download requested.', { exact: true }).waitFor({ timeout: 30_000 })
+      expect(observerDownloads).toBe(0)
+      expect(await observer.getByRole('dialog', { name: 'Session download started' }).count()).toBe(0)
+      expect({
+        pageErrors: observerTripwire.pageErrors,
+        slotErrors: observerSlotErrors,
+        warnings: observerTripwire.warnings,
+      }).toEqual({ pageErrors: [], slotErrors: [], warnings: [] })
+    } finally {
+      await observer.close()
+    }
+  }, 120_000)

  it.skipIf(MODE === 'record')('focuses the ledger by dragging an overview interval', async () => {
    onTestFailed(() => saveFailureShot(page, 'web-e2e-navigation-timeline'))
@@ -51,7 +51,7 @@ import { dshHomePath } from '@deepseek-ai/dsh-paths'
 // } from '@deepseek-ai/dsh-client-ui-settings-general'
 export const WELCOME_NOTICE_SETTINGS_NAMESPACE = 'ui-onboarding'
 export const WELCOME_NOTICE_ACK_FIELD = 'welcomeNoticeVersion'
-export const WELCOME_NOTICE_VERSION = '2026-07-30.7'
+export const WELCOME_NOTICE_VERSION = '2026-08-11.1'
 export const WELCOME_NOTICE_COPY = { zh: { title: '内测声明', continueLabel: '继续' } } as const

 import { settingsNamespace } from '@deepseek-ai/dsh-settings'
@@ -421,7 +421,14 @@ export async function launchWebScaffold(options: LaunchOptions = {}): Promise<We
    // disclosure passes a local dead endpoint instead of disabling the row.
    options.telemetryUrl === undefined
      ? { id: 'telemetry-otel', disabled: true }
-      : { id: 'telemetry-otel', config: { exporter: { url: options.telemetryUrl }, shutdownTimeoutMillis: 1_000 } },
+      : {
+        id: 'telemetry-otel',
+        config: {
+          mode: 'FULL',
+          exporter: { url: options.telemetryUrl },
+          shutdownTimeoutMillis: 1_000,
+        },
+      },
    {
      id: 'webserver',
      config: { host: '127.0.0.1', port: 0 },
@@ -138,13 +138,13 @@ async function detailsTrack(page: Page): Promise<number> {
  return Number(cols.split(' ').pop()!.replace('px', ''))
 }

-// Readiness gate: `dsh web` serves all ten production manifest plugins; until every UI
+// Readiness gate: `dsh web` serves every production manifest plugin; until every UI
 // plugin's client bundle exists and exports apply, the loader fail-louds and
 // the frame never appears.
 const UI_PLUGIN_DIRS = [
  'connection', 'runtime', 'ui-theme', 'locale', 'ui-layout', 'ui-sidebar',
  'ui-settings', 'ui-settings-general', 'ui-models', 'ui-conversation',
-  'ui-model', 'ui-question', 'ui-trajectory',
+  'ui-model', 'ui-question', 'ui-trajectory', '../session-query/session-export',
 ]
 const ROUND_DONE_MARKER = 'WEB_ROUND_DONE'
 const notReady = UI_PLUGIN_DIRS.filter((dir) => {
@@ -5,3 +5,6 @@
 - button "1 subagent":
  - text: 1 subagent
  - img
+- button "Session log":
+  - text: Session log
+  - img
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - 'button "Run two shell commands: wait" [disabled]'
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - 'button "Using ONE run_code program: run" [disabled]'
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use only Cordis tools. First" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with the single word" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use the bash tool to" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "workspace" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "workspace" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,7 @@
 - listbox "Trigger suggestions":
  - text: Commands
  - option "compact Compact older conversation history" [selected]
+  - option "export Download this Session log as a ZIP archive"
  - option "feedback record feedback about this session"
  - option "goal set or view the goal for a long-running task"
  - option "permission Switch the permission preset (sandbox mode + approval policy)"
@@ -3,6 +3,9 @@
    - button "Reply with the single word" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "CJK strong emphasis" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Markdown image policy" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Inline code links" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Math rendering" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Use the read tool twice" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -2,7 +2,6 @@
  - button "Use actual duration": Duration
  - button "Collapse turns": Turns
  - button "Collapse calls": Calls
-  - button "Export session log": Export
  - img
  - searchbox "Search trajectory"
 - region "Trajectory timeline":
@@ -3,6 +3,9 @@
    - 'button "Plan a small change: add" [disabled]'
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use the ask_user_question tool to" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "workspace" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Reply with a one-sentence description" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Use the read tool twice" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Use the read tool twice" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Use the read tool twice" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -1,6 +1,9 @@
 - banner:
  - navigation "Session hierarchy":
    - button "Load the snapshot-skill skill with" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "/user-invoke-demo and confirm the fixtur" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use the ask_user_question tool to" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use the ask_user_question tool to" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use the ask_user_question tool to" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use the ask_user_question tool to" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -5,6 +5,9 @@
    - button "event-sourcing researcher"
    - text: /
    - button "example editor" [disabled]
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -8,6 +8,9 @@
  - button "1 subagent":
    - text: 1 subagent
    - img
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -5,6 +5,9 @@
    - button "event-sourcing researcher" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Begin your reply with the" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Begin your reply with the" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -3,6 +3,9 @@
    - button "Use web_search to search exactly" [disabled]
  - img
  - text: Standard mode
+  - button "Session log":
+    - text: Session log
+    - img
  - tablist:
    - tab "Chat" [selected]
    - tab "Trajectory"
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/config-catalog.md
-config-catalog.md: 369490ec41480b8c46355f0edc3eb97f2f0c76cb
-config-catalog.zh.md: a735d7021d44dda3cffa49c31430249f70431720
+config-catalog.md: 3eb59072b712c4386072042ba1c6f4f1f54423ca
+config-catalog.zh.md: 63f421f944fcfd69de9235ba09c78b1afe93f952
@@ -2846,6 +2846,7 @@ These load from a `cordis.yml` entry with no `config:` block; they declare no co
 - `@deepseek-ai/dsh-pty` ([`packages/pty/pty/src/index.ts`](../packages/pty/pty/src/index.ts))
 - `@deepseek-ai/dsh-session` ([`packages/core/session/src/index.ts`](../packages/core/session/src/index.ts))
 - `@deepseek-ai/dsh-session-checkpoint-policy` — requires `llm` · `sessionPersistence` · `sessions` · `tools` ([`packages/session/session-checkpoint-policy/src/index.ts`](../packages/session/session-checkpoint-policy/src/index.ts))
+- `@deepseek-ai/dsh-session-export` — requires `commands` ([`packages/session-query/session-export/src/index.ts`](../packages/session-query/session-export/src/index.ts))
 - `@deepseek-ai/dsh-session-projection` ([`packages/session/session-projection/src/index.ts`](../packages/session/session-projection/src/index.ts))
 - `@deepseek-ai/dsh-skill-badge` — requires `skills` ([`packages/skill/skill-badge/src/index.ts`](../packages/skill/skill-badge/src/index.ts))
 - `@deepseek-ai/dsh-storage` ([`packages/storage/storage/src/index.ts`](../packages/storage/storage/src/index.ts))
@@ -2847,6 +2847,7 @@ export interface Config {
 - `@deepseek-ai/dsh-pty`（[`packages/pty/pty/src/index.ts`](../packages/pty/pty/src/index.ts)）
 - `@deepseek-ai/dsh-session`（[`packages/core/session/src/index.ts`](../packages/core/session/src/index.ts)）
 - `@deepseek-ai/dsh-session-checkpoint-policy` — 需要 `llm` · `sessionPersistence` · `sessions` · `tools`（[`packages/session/session-checkpoint-policy/src/index.ts`](../packages/session/session-checkpoint-policy/src/index.ts)）
+- `@deepseek-ai/dsh-session-export` — 需要 `commands`（[`packages/session-query/session-export/src/index.ts`](../packages/session-query/session-export/src/index.ts)）
 - `@deepseek-ai/dsh-session-projection`（[`packages/session/session-projection/src/index.ts`](../packages/session/session-projection/src/index.ts)）
 - `@deepseek-ai/dsh-skill-badge` — 需要 `skills`（[`packages/skill/skill-badge/src/index.ts`](../packages/skill/skill-badge/src/index.ts)）
 - `@deepseek-ai/dsh-storage`（[`packages/storage/storage/src/index.ts`](../packages/storage/storage/src/index.ts)）
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/module-graph.md
-module-graph.md: 56e029df192f28a787748b12074ee4dfe67d1c58
-module-graph.zh.md: 839c5edf758a3076874643cb6bdbd91954ca369e
+module-graph.md: 371699d8a4aab83eb8603ce1623373fe56871dd3
+module-graph.zh.md: 381a387ff77ef36dda31655bb9c0e4d5b931e544
@@ -108,6 +108,7 @@ flowchart TD
    pkg_hooks_codex["hooks-codex"]
  end
  subgraph group_session_query["packages/session-query"]
+    pkg_session_export["session-export"]
    pkg_session_query["session-query"]
    pkg_session_query_sqlite["session-query-sqlite"]
    pkg_tool_session_query["tool-session-query"]
@@ -1326,6 +1327,14 @@ flowchart TD
  pkg_host_directory_picker_auto --> pkg_host_directory_picker_native
  pkg_host_directory_picker_auto --> pkg_host_webserver
  pkg_host_directory_picker_auto --> pkg_invariants
+  pkg_session_export --> pkg_client_locale
+  pkg_session_export --> pkg_client_runtime
+  pkg_session_export --> pkg_client_ui_command
+  pkg_session_export --> pkg_client_ui_conversation
+  pkg_session_export --> pkg_client_ui_primitives
+  pkg_session_export --> pkg_client_ui_slots
+  pkg_session_export --> pkg_commands
+  pkg_session_export --> pkg_invariants
  pkg_client_ui_model --> pkg_api_remotes
  pkg_client_ui_model --> pkg_client_connection
  pkg_client_ui_model --> pkg_client_locale
@@ -1572,6 +1581,7 @@ flowchart TD
 | [`client-ui-tool`](../packages/client/ui-tool) | `client` | [`api-remotes`](../packages/api/remotes), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants) |
 | [`client-ui-workflow-run`](../packages/client/ui-workflow-run) | `client` | [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`tool-workflow`](../packages/workflow/tool-workflow), [`workflow`](../packages/workflow/workflow) |
 | [`host-directory-picker-auto`](../packages/host/directory-picker-auto) | `host` | [`client-ui-directory-picker`](../packages/client/ui-directory-picker), [`client-ui-directory-picker-native`](../packages/client/ui-directory-picker-native), [`host-directory-picker-browse`](../packages/host/directory-picker-browse), [`host-directory-picker-native`](../packages/host/directory-picker-native), [`host-webserver`](../packages/host/webserver), [`invariants`](../packages/support/invariants) |
+| [`session-export`](../packages/session-query/session-export) | `session-query` | [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-command`](../packages/client/ui-command), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slots`](../packages/client/ui-slots), [`commands`](../packages/interaction/commands), [`invariants`](../packages/support/invariants) |
 | [`client-ui-model`](../packages/client/ui-model) | `client` | [`api-remotes`](../packages/api/remotes), [`client-connection`](../packages/client/connection), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-command`](../packages/client/ui-command), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slash`](../packages/client/ui-slash), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants) |
 | [`client-ui-permission`](../packages/client/ui-permission) | `client` | [`api-remotes`](../packages/api/remotes), [`client-connection`](../packages/client/connection), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-schema-form`](../packages/client/schema-form), [`client-ui-command`](../packages/client/ui-command), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-settings`](../packages/client/ui-settings), [`client-ui-slash`](../packages/client/ui-slash), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants), [`permission`](../packages/interaction/permission) |
 | [`client-ui-skill`](../packages/client/ui-skill) | `client` | [`api-remotes`](../packages/api/remotes), [`client-connection`](../packages/client/connection), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slash`](../packages/client/ui-slash), [`client-ui-slots`](../packages/client/ui-slots), [`client-ui-tool`](../packages/client/ui-tool), [`invariants`](../packages/support/invariants) |
@@ -110,6 +110,7 @@ flowchart TD
    pkg_hooks_codex["hooks-codex"]
  end
  subgraph group_session_query["packages/session-query"]
+    pkg_session_export["session-export"]
    pkg_session_query["session-query"]
    pkg_session_query_sqlite["session-query-sqlite"]
    pkg_tool_session_query["tool-session-query"]
@@ -1328,6 +1329,14 @@ flowchart TD
  pkg_host_directory_picker_auto --> pkg_host_directory_picker_native
  pkg_host_directory_picker_auto --> pkg_host_webserver
  pkg_host_directory_picker_auto --> pkg_invariants
+  pkg_session_export --> pkg_client_locale
+  pkg_session_export --> pkg_client_runtime
+  pkg_session_export --> pkg_client_ui_command
+  pkg_session_export --> pkg_client_ui_conversation
+  pkg_session_export --> pkg_client_ui_primitives
+  pkg_session_export --> pkg_client_ui_slots
+  pkg_session_export --> pkg_commands
+  pkg_session_export --> pkg_invariants
  pkg_client_ui_model --> pkg_api_remotes
  pkg_client_ui_model --> pkg_client_connection
  pkg_client_ui_model --> pkg_client_locale
@@ -1574,6 +1583,7 @@ flowchart TD
 | [`client-ui-tool`](../packages/client/ui-tool) | `client` | [`api-remotes`](../packages/api/remotes), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants) |
 | [`client-ui-workflow-run`](../packages/client/ui-workflow-run) | `client` | [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants), [`session`](../packages/core/session), [`tool-workflow`](../packages/workflow/tool-workflow), [`workflow`](../packages/workflow/workflow) |
 | [`host-directory-picker-auto`](../packages/host/directory-picker-auto) | `host` | [`client-ui-directory-picker`](../packages/client/ui-directory-picker), [`client-ui-directory-picker-native`](../packages/client/ui-directory-picker-native), [`host-directory-picker-browse`](../packages/host/directory-picker-browse), [`host-directory-picker-native`](../packages/host/directory-picker-native), [`host-webserver`](../packages/host/webserver), [`invariants`](../packages/support/invariants) |
+| [`session-export`](../packages/session-query/session-export) | `session-query` | [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-command`](../packages/client/ui-command), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slots`](../packages/client/ui-slots), [`commands`](../packages/interaction/commands), [`invariants`](../packages/support/invariants) |
 | [`client-ui-model`](../packages/client/ui-model) | `client` | [`api-remotes`](../packages/api/remotes), [`client-connection`](../packages/client/connection), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-command`](../packages/client/ui-command), [`client-ui-conversation`](../packages/client/ui-conversation), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slash`](../packages/client/ui-slash), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants) |
 | [`client-ui-permission`](../packages/client/ui-permission) | `client` | [`api-remotes`](../packages/api/remotes), [`client-connection`](../packages/client/connection), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-schema-form`](../packages/client/schema-form), [`client-ui-command`](../packages/client/ui-command), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-settings`](../packages/client/ui-settings), [`client-ui-slash`](../packages/client/ui-slash), [`client-ui-slots`](../packages/client/ui-slots), [`invariants`](../packages/support/invariants), [`permission`](../packages/interaction/permission) |
 | [`client-ui-skill`](../packages/client/ui-skill) | `client` | [`api-remotes`](../packages/api/remotes), [`client-connection`](../packages/client/connection), [`client-locale`](../packages/client/locale), [`client-runtime`](../packages/client/runtime), [`client-ui-primitives`](../packages/client/ui-primitives), [`client-ui-slash`](../packages/client/ui-slash), [`client-ui-slots`](../packages/client/ui-slots), [`client-ui-tool`](../packages/client/ui-tool), [`invariants`](../packages/support/invariants) |
@@ -65,6 +65,10 @@
      config:
        maxNoteBytes: 8192

+    # Browser Session export: `/export` command plus the shared download dialog.
+    - id: session-export
+      name: '@deepseek-ai/dsh-session-export'
+
    - id: workspace
      name: '@deepseek-ai/dsh-workspace'

@@ -92,6 +92,7 @@
    "@deepseek-ai/dsh-host-webserver": "workspace:^",
    "@deepseek-ai/dsh-message-feedback": "workspace:^",
    "@deepseek-ai/dsh-session-projection-cache": "workspace:^",
+    "@deepseek-ai/dsh-session-export": "workspace:^",
    "@deepseek-ai/dsh-storage": "workspace:^",
    "@deepseek-ai/dsh-storage-domain": "workspace:^",
    "@deepseek-ai/dsh-storage-json": "workspace:^",
@@ -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 packages/client/ui-command/README.md
-README.md: 60b70cfbc3784dd5b138f8857270c4bbdc0fd634
-README.zh.md: 639b7f997e967527232bb88116558c5457b4d497
+README.md: 0281df76fe601eaad86cefc0dcaecc6d8999df60
+README.zh.md: ace51230d6d250f4a3b09a5212182ccf434f9249
@@ -8,6 +8,8 @@ Client command API (`ctx.command`): the session-keyed command-directory cache, t

 `CommandDirectory` (`src/client/directory.ts`) is the one wire-derived cache, keyed by session. Ordinary sessions fetch through `command.list({sessionId})`, and the source's scope-birth `warm` hook prewarms the session's entry. Catalog-addressed continuable children resolve an empty command directory locally: `command.list` is Agent-bound, so prewarming it would activate a child merely to view persisted history. Entries are soft-invalidated by the forwarded `commands/change` owner event (old snapshots serve while the repull flies) and by forwarded `agent-preset/selected` for that one session (recomposing an agent registers nothing, so the registry-wide signal never fires for it), hard-invalidated by `connection/reset`, and epoch-guarded so a superseded pull can never overwrite a newer one. `matchSpace` answers synchronously from this cache only; `matchEnter` strong-waits it on the SubmitAttempt signal and rejects on warmup failure — a `/` line is never silently downgraded to a plain prompt.

+After `command.execute` returns a matched command result, this browser emits local `command/executed(sessionId, name, result)`. Other clients receive the durable command nodes through the Host event stream but never this acknowledgment, so a browser-only side effect can select successful results from the client that submitted the command without treating Session replay as an action request. Listener failures are logged and contained one by one; they cannot change the already-admitted command result or prevent later listeners from running.
+
 Menu queries fuzzy-match ordered, case-insensitive subsequences of command names. Prefixes rank first; separator boundaries, adjacent characters, and shorter gaps rank the remaining matches, with directory and contribution order breaking ties. This affects discovery only: space and Enter still require an exact command name. Rationale: [Web slash-command fuzzy discovery](../../../.agents/notes/implemented/feature/2026-08-04-web-slash-command-fuzzy-discovery.md).

 `PopupSelectController` (`src/client/popup.ts`) is the headless shell state: `PopupSelectView` self-registers into `conversation.input.overlay` (the SlotMap key is ui-conversation's; this package pulls the declaration in with a type-only import — no runtime edge). The shell is a transient layer holding focus while open; token-segment consumption after onSelect runs both branches through `consumeTokenSegment` (menu-path span CAS, enter-path bare-token equality) against the draft face the wiring layer binds via `bindDraft`.
@@ -8,6 +8,8 @@

 `CommandDirectory`（`src/client/directory.ts`）是唯一的 wire 派生缓存，以会话为 key。普通会话通过 `command.list({sessionId})` 拉取，source 的 scope 出生 `warm` 钩子会预热该会话的缓存项。由目录寻址的可继续子代理会在客户端解析为空命令目录：`command.list` 绑定 Agent，若预热它，就会仅因查看持久化历史而激活子代理。缓存项由转发的 owner 事件 `commands/change` 软失效（重拉在途期间旧快照继续服务），也由转发的 `agent-preset/selected` 对该会话单独软失效（重组 agent 不产生任何注册，注册表级信号不会为它触发），由 `connection/reset` 硬失效，并以 epoch 把关，被取代的旧拉取永远无法覆盖更新的结果。`matchSpace` 只凭该缓存同步应答；`matchEnter` 在 SubmitAttempt 信号上强等缓存，预热失败即拒绝——`/` 开头的一行绝不会被静默降级为普通提示词。

+`command.execute` 返回已匹配的命令结果后，当前浏览器会发布本地 `command/executed(sessionId, name, result)`。其他客户端只会通过 Host 事件流收到持久命令节点，不会收到这条确认，因此浏览器专属副作用可以筛选由实际提交命令的客户端收到的成功结果，而不会把 Session 回放当成操作请求。监听器失败会逐项记录并隔离，不会改变已经准入的命令结果，也不会阻止后续监听器运行。
+
 菜单查询会按顺序且不区分大小写地模糊匹配命令名的子序列。前缀排名最高；其余匹配项按分隔符边界优先、相邻字符优先、间隔越短越优先的规则排序，若仍同分，则以目录顺序和 contribution 顺序打破平局。此行为只影响命令发现：space 和 Enter 仍要求命令名精确匹配。原理：[Web 斜杠命令模糊发现](../../../.agents/notes/implemented/feature/2026-08-04-web-slash-command-fuzzy-discovery.md)。

 `PopupSelectController`（`src/client/popup.ts`）是无头的壳状态：`PopupSelectView` 自行注册进 `conversation.input.overlay`（SlotMap key 归 ui-conversation 所有；本包只以 type-only 导入引入该声明——没有运行时依赖边）。壳是打开期间持有焦点的瞬态层；onSelect 之后的 token 片段消费在两条分支上都经 `consumeTokenSegment` 执行（菜单路径做 span CAS，回车路径做裸 token 相等比较），作用于接线层经 `bindDraft` 绑定的草稿表层。
@@ -12,6 +12,7 @@ import type { Context } from '@deepseek-ai/cordis'
 // Type-only: pulls the ctx.remote merge and the forwarded-event key face
 // (`commands/change` rides the allowlist) into this program.
 import type {} from '@deepseek-ai/dsh-api-remotes/client'
+import type { CommandResult } from '@deepseek-ai/dsh-commands/types'
 import type { ClientContext, ISessions, SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import type {
  CandidateRequest, ClientSessionContext, CommandClaim, PickOutcome, SlashCandidate, SlashPick,
@@ -23,6 +24,28 @@ import { CommandDirectory } from './directory.ts'
 import { PopupSelectController } from './popup.ts'
 import type { TokenSegment } from './popup.ts'

+declare module '@deepseek-ai/cordis' {
+  interface Events {
+    /**
+     * This browser client completed one admitted Host command execution.
+     * Other clients receive the durable command nodes but never this local
+     * submission acknowledgment.
+     * @param sessionId - Session addressed by the local submission.
+     * @param name - Executed command name without the leading slash.
+     * @param result - Host command result returned to this browser.
+     * @mode emit
+     */
+    'command/executed'(sessionId: SessionId, name: string, result: CommandResult): void
+  }
+}
+
+/** Recover the command name from a line the Host confirmed as executed. */
+function submittedCommandName(line: string): string {
+  const trimmed = line.trim()
+  const separator = trimmed.search(/\s/u)
+  return (separator === -1 ? trimmed : trimmed.slice(0, separator)).slice(1)
+}
+
 /** Live mutable state in one holder (service methods run behind the caller-ctx tracker). */
 interface LiveState {
  readonly contributions: Map<string, CommandContribution>
@@ -351,9 +374,33 @@ export class CommandService extends Service implements CommandServiceContract {
    const result = await this.ctx.remote.commands.execute(session.sessionId, line)
    if (!result.ok) throw new Error(`command.execute failed: ${result.error.code}: ${result.error.message}`)
    if (result.value === undefined) return { kind: 'error', text: `unknown or malformed command: ${line}` }
+    this.notifyExecuted(session.sessionId, submittedCommandName(line), result.value.result)
    return { kind: 'success' }
  }

+  /** Publish the local acknowledgment without letting an observer change command admission. */
+  private notifyExecuted(sessionId: SessionId, name: string, result: CommandResult): void {
+    const args = ['command/executed', sessionId, name, result]
+    for (const listener of this.ctx.events.dispatch('emit', args) as Array<(...listenerArgs: unknown[]) => unknown>) {
+      try {
+        const returned = listener(sessionId, name, result)
+        if (returned != null && typeof (returned as PromiseLike<unknown>).then === 'function') {
+          void Promise.resolve(returned as PromiseLike<unknown>).then(undefined, (error: unknown) => {
+            this.warnExecutedListenerFailure(name, error)
+          })
+        }
+      } catch (error) {
+        this.warnExecutedListenerFailure(name, error)
+      }
+    }
+  }
+
+  /** Log one contained `command/executed` observer failure. */
+  private warnExecutedListenerFailure(name: string, error: unknown): void {
+    this.ctx.logger.warn('client command: a command/executed listener for "%s" failed', name)
+    this.ctx.logger.warn(error)
+  }
+
  /**
   * Fire-and-forget execute for the internal ('handled') paths. Outcomes are
   * NOT surfaced here: the host executor durably logs the command lifecycle
@@ -9,6 +9,7 @@
 */
 import { Context } from '@deepseek-ai/cordis'
 import { describe, expect, it, vi } from 'vitest'
+import type { CommandResult } from '@deepseek-ai/dsh-commands/types'
 import { createScope, scopeOf } from '@deepseek-ai/dsh-client-runtime/client'
 import type { SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import type { ClientSessionContext, ConsumeTokenRequest, SlashPick, SlashSource } from '@deepseek-ai/dsh-client-ui-slash/client'
@@ -120,6 +121,10 @@ async function bench(opts: BenchOptions = {}) {
    },
  })
  ctx.provide('remote.commands', commandsRemote)
+  const executions: Array<{ sessionId: SessionId; name: string; result: CommandResult }> = []
+  ctx.on('command/executed', (sessionId, name, result) => {
+    executions.push({ sessionId, name, result })
+  })
  /** Notices the fake conversation face collected (runDetached routing). */
  const notices: Array<{ scope: SessionId | undefined; level: 'info' | 'error'; text: string }> = []
  ctx.provide('conversation', {
@@ -145,7 +150,7 @@ async function bench(opts: BenchOptions = {}) {
  const warm = async (session: ClientSessionContext) => {
    await source.candidates(session, { query: '', position: 'leading', signal: new AbortController().signal })
  }
-  return { ctx, fiber, command, source, mint, warm, listCalls, executeCalls, registered, notices }
+  return { ctx, fiber, command, source, mint, warm, listCalls, executeCalls, executions, registered, notices }
 }

 function menuPick(source: SlashSource, name: string, session: ClientSessionContext, end?: number) {
@@ -367,7 +372,7 @@ describe('dispatch (menu column)', () => {
  })

  it('host bare → consume-token span guard on the session scope + detached execute', async () => {
-    const { source, mint, warm, executeCalls } = await bench()
+    const { source, mint, warm, executeCalls, executions } = await bench()
    const scope = mint('s1')
    const consumes: ConsumeTokenRequest[] = []
    scope.ctx.on('slash/input-consume-token', (r) => {
@@ -377,8 +382,14 @@ describe('dispatch (menu column)', () => {
    await warm(proj('s1'))
    expect(menuPick(source, 'plan', proj('s1'), 5)).toBe('handled')
    expect(consumes).toEqual([{ guard: { kind: 'span', span: { start: 0, end: 5, draftRev: 3 } } }])
-    await Promise.resolve()
-    expect(executeCalls).toEqual([{ sessionId: sid('s1'), line: '/plan' }])
+    await vi.waitFor(() => {
+      expect(executeCalls).toEqual([{ sessionId: sid('s1'), line: '/plan' }])
+      expect(executions).toEqual([{
+        sessionId: sid('s1'),
+        name: 'plan',
+        result: { kind: 'success' },
+      }])
+    })
  })

  it('a name the directory no longer serves → undefined (snapshot swapped between menu and pick)', async () => {
@@ -496,7 +507,7 @@ describe('matchEnter (enter column)', () => {

 describe('execute payload', () => {
  it('claim.submit addresses the session; admitted outcomes stay off the composer (flow card owns them)', async () => {
-    const { source, warm, executeCalls } = await bench({
+    const { source, warm, executeCalls, executions } = await bench({
      execute: () => Promise.resolve({ matched: true }),
    })
    await warm(proj('s1'))
@@ -507,6 +518,34 @@ describe('execute payload', () => {
    // Pure admission: no outcome text ever rides the submit result — the
    // durable command lifecycle events render the outcome in the flow.
    expect(settled).toEqual({ kind: 'success' })
+    expect(executions).toEqual([{
+      sessionId: sid('s1'),
+      name: 'goal',
+      result: { kind: 'success' },
+    }])
+  })
+
+  it('contains local acknowledgment listeners without changing an admitted result', async () => {
+    const b = await bench({ execute: () => Promise.resolve({ matched: true }) })
+    await b.warm(proj('s1'))
+    const outcome = b.source.matchSpace!(proj('s1'), '/goal')
+    if (outcome === undefined || outcome === 'handled' || !('claim' in outcome)) throw new Error('expected claim')
+    const syncFailure = new Error('sync observer failed')
+    const asyncFailure = new Error('async observer failed')
+    const after = vi.fn()
+    const warn = vi.spyOn(b.ctx.logger, 'warn').mockImplementation(() => undefined)
+    b.ctx.on('command/executed', () => { throw syncFailure })
+    const rejectingListener = (() => Promise.reject(asyncFailure)) as unknown as () => void
+    b.ctx.on('command/executed', rejectingListener)
+    b.ctx.on('command/executed', after)
+
+    await expect(outcome.claim.submit('ship it', new Context())).resolves.toEqual({ kind: 'success' })
+    expect(after).toHaveBeenCalledOnce()
+    await Promise.resolve()
+    await Promise.resolve()
+    expect(warn).toHaveBeenCalledWith('client command: a command/executed listener for "%s" failed', 'goal')
+    expect(warn).toHaveBeenCalledWith(syncFailure)
+    expect(warn).toHaveBeenCalledWith(asyncFailure)
  })

  it('maps matched:false to an error outcome and a matched bare result to success', async () => {
@@ -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 packages/client/ui-conversation/README.md
-README.md: e2db456f92151c3602fce0bf40a86e4019cda1cb
-README.zh.md: 399228c619d50a7fc1909db81350b4078803f8f7
+README.md: b6a265c9f0a67d31ebeaa88bd59082c4be465983
+README.zh.md: be06e988500e0c3e6fc69409552459b8cfff75e9
@@ -16,7 +16,7 @@ Chat business rows are independent registry contributions rather than a closed b

 Approvals take over the composer through the chain this package declares: `ApprovalPanel` registers as a selector-routed `'conversation.composer'` entry (the ui-question pattern) and occupies the composer in place of the InputBar while an approval wait is pending (amber strip, justification headline, paired command line from the running call's args, one-shot refuse/allow). The `PendingApproval` domain face in `contract/slots.ts` owns the wire encoding — the `ApprovalResponsePayload` value with the audit correlation — over the runtime's `PendingWait` carrier; the broadcast `approval/resolved` frame settles the wait and restores the composer. The runtime manager projects every approval or question wait through `SessionSummary.pendingInteraction`, including sessions never instantiated; `ui-workspace` owns its sidebar presentation. Pending waits leave the message flow entirely: questions (ui-question) and approvals (ApprovalPanel) both answer through the composer takeover, so no display-only placeholder card remains. The composer's bottom-row Access seat mounts `PermissionSelect`, fed by the host-computed `permissions` projection through the standard-kit `useProjection` (key absence hides the chip); the chip opens a Menu-primitive dropdown whose kebab-case preset names render as title-case labels. Safe preset picks submit `/permission <preset>` immediately through the bar's injected `command` callback, while `danger-full-access` is presented as `Full access` and first opens an in-page Modal risk confirmation. The enabling action stays disabled until the user checks the acknowledgement; cancel, Escape, close, and mask click submit nothing.

-The session header declares and renders the session-scoped `'conversation.session.header.actions'` list beside the title, allowing feature plugins to contribute controls without entering the skeleton. The composer chain currency includes the current conversation `session`; ui-subagent selects one-shot or parent-unavailable addressed sessions for reason-specific read-only copy, while the ordinary InputBar keeps every addressed child Send-only because the continuation service exposes no public per-Activation cancellation operation and `session.cancel` would bypass its ownership.
+The session header renders the session-scoped `'conversation.session.header.actions'` list beside the title and the independent `'conversation.session.header.utilities'` list at the right edge. Session context and lineage controls remain in `actions`; optional Session utilities cannot reorder or move them. The composer chain currency includes the current conversation `session`; ui-subagent selects one-shot or parent-unavailable addressed sessions for reason-specific read-only copy, while the ordinary InputBar keeps every addressed child Send-only because the continuation service exposes no public per-Activation cancellation operation and `session.cancel` would bypass its ownership.

 Logged non-user messages render as a default-collapsed disclosure whose header names the role the runtime projected for the message — `上下文注入` for an injection, `跨会话召回` for a recalled session — followed by the producer name that projection read out of the durable source, so a reader distinguishes a skill catalog from a workspace instruction file or a recalled session without expanding. A source that names no producer shows the role alone. The shared `DisclosureRow` primitive gives this context surface the same compact geometry as other flow rows while retaining context semantics: the expanded body follows its content height up to a 141px scrolling cap and synthesizes no tool state or summary ([historical disclosure decision](../../../.agents/notes/archived/feature/2026-07-30-web-context-injection-disclosure.md), [producer-label decision](../../../.agents/notes/implemented/feature/2026-08-04-web-context-source-and-steer-marks.md)). That body follows the form the producer declared on its durable source: `instructions` names the reconciled files above their text, `catalog` lists the entries the source recorded instead of the model-facing prose, and every other value — absent, unknown to this version, or carrying no usable fields — renders the opaque body, which shows the model-facing text with its real line breaks and the remaining source fields. The opaque body is the documented default, not a leftover: a resumed, forked, or foreign log must render whether or not its producer is mounted here. A durable or pending steering bubble shares the user bubble's presentation unadorned; its mid-turn position in the flow is the only steering signal the transcript shows.

@@ -14,7 +14,7 @@

 Chat 业务行是彼此独立的注册表贡献，不是封闭的内建联合。Client 插件通过 declaration merging 增加类型化 `ChatNodeDataMap` key，在 `ctx.conversationEvents` 上注册 `ConversationNodeDefinition`，再向 `conversation.chat.node` 注册匹配的 keyed renderer；它无须修改 Session fold 或中央 renderer switch。稳定事件 id、append/prepend 回放、Location data 与 renderer 约束见 [Conversation Node 实操手册](../../../docs/cookbook/adding-a-conversation-node.md)。

-会话页头会在标题旁声明并渲染 Session scope 的 `'conversation.session.header.actions'` 列表，使功能插件无需进入骨架即可贡献控件。编辑器链的 currency 包含当前对话 `session`；ui-subagent 会选取 one-shot 或 parent 不可用的已寻址会话，并按原因显示只读文案，而普通 InputBar 会让所有已寻址 child 仅保留 Send，因为继续执行服务不公开逐 Activation 取消操作，`session.cancel` 也会绕过其所有权。
+会话页头会在标题旁渲染 Session scope 的 `'conversation.session.header.actions'` 列表，并在最右侧渲染独立的 `'conversation.session.header.utilities'` 列表。Session 上下文和谱系控件保留在 `actions` 中，可选的 Session 工具不会改变它们的顺序或位置。编辑器链的 currency 包含当前对话 `session`；ui-subagent 会选取 one-shot 或 parent 不可用的已寻址会话，并按原因显示只读文案，而普通 InputBar 会让所有已寻址 child 仅保留 Send，因为继续执行服务不公开逐 Activation 取消操作，`session.cancel` 也会绕过其所有权。

 已记录的非用户消息渲染为默认折叠的展开项，标题栏先给出运行时为该消息投影出的角色——注入为 `上下文注入`，召回为 `跨会话召回`——其后是该投影从持久来源读出的生产者名称，因此读者无需展开即可区分 skill（技能）目录、工作区指令文件与被召回的会话。来源未提供生产者名称时只显示角色。共享的 `DisclosureRow` 原子组件让该上下文界面与消息流中的其他紧凑行保持相同几何，同时保留上下文语义：展开内容区的高度会随内容自适应，最大为 141px，超出后滚动，且不会合成工具状态或摘要（[历史展开项决策](../../../.agents/notes/archived/feature/2026-07-30-web-context-injection-disclosure.md)、[生产者标签决策](../../../.agents/notes/implemented/feature/2026-08-04-web-context-source-and-steer-marks.md)）。该内容区按生产方在持久来源上声明的形态渲染：`instructions` 在正文之上列出它对账过的文件，`catalog` 列出来源记录的条目而非面向模型的散文，其余取值——未声明、本版本不认识、或字段不可用——一律渲染 opaque 内容区，即按真实换行展示面向模型的文本，并把剩余来源字段列出。opaque 不是兜底剩余物而是有文档的默认：恢复的、fork 的、外部写入的日志，无论其生产方是否挂载在此处，都必须渲染得出来。持久或待处理的 steering（中途引导）气泡沿用用户气泡的呈现，不加任何装饰；transcript 中唯一的 steering 信号是它出现在轮次中途的位置。

@@ -259,6 +259,7 @@ export function apply(ctx: Context): void {
    locale: NS,
    children: {
      'conversation.session.header.actions': { kind: 'list', scope: 'session' },
+      'conversation.session.header.utilities': { kind: 'list', scope: 'session' },
    },
    store: chatStore,
    inject: (): ConversationSessionHeaderInjected => ({
@@ -45,6 +45,11 @@ declare module '@deepseek-ai/dsh-client-ui-slots' {
     * context that precedes interactive actions.
     */
    'conversation.session.header.actions': { kind: 'list'; scope: 'session'; owner: ConversationHeaderActionOwnerProps }
+    /**
+     * Right-aligned Session utilities kept outside the title-adjacent action
+     * group, so an optional utility cannot reorder session context or lineage.
+     */
+    'conversation.session.header.utilities': { kind: 'list'; scope: 'session'; owner: ConversationHeaderActionOwnerProps }
    /**
     * The conversation view ring: one list entry per view tab (chat here;
     * trajectory/waterfall from ui-trajectory), rendered one-at-a-time by
@@ -525,7 +530,7 @@ export type ConversationSessionSlotProps =
 /** Full strict-session header props: shared store, tabs/actions render shares, navigation, and locale. */
 export type ConversationSessionHeaderSlotProps =
  PropsRuntime<'conversation.session.header'>
-  & PropsRenderSlots<'conversation.session.header.actions'>
+  & PropsRenderSlots<'conversation.session.header.actions' | 'conversation.session.header.utilities'>
  & PropsStore<ChatStore>
  & ConversationSessionHeaderInjected
  & PropsLocale<'conversation'>
@@ -53,9 +53,18 @@
 .titleRow {
  display: flex;
  align-items: center;
-  gap: 10px;
+  gap: 0;
  min-height: 32px;
 }
+
+.titleCluster {
+  display: flex;
+  flex: 1;
+  align-items: center;
+  gap: 10px;
+  min-width: 0;
+}
+
 .crumbs {
  display: flex;
  align-items: center;
@@ -111,6 +120,18 @@
  gap: 8px;
 }

+.headerUtilities {
+  display: flex;
+  flex: none;
+  align-items: center;
+  gap: 8px;
+  margin-left: 20px;
+}
+
+.headerUtilities:empty {
+  display: none;
+}
+
 /* figma Tab_Group 34:11441: 35px strip, gap 36, pad-left 8, tabs bottom-aligned. */
 .tabs {
  position: relative;
@@ -69,27 +69,32 @@ export function ConversationSessionHeader({
      {!hideChrome && (
        <>
          <div className={css.titleRow}>
-            <nav className={css.crumbs} aria-label={t('session.hierarchy')}>
-              {ancestry.map((summary, index) => {
-                const last = index === ancestry.length - 1
-                return (
-                  <span key={summary.id} className={css.crumbSeg}>
-                    {index > 0 && <span className={css.crumbSep}>/</span>}
-                    <button
-                      type="button"
-                      className={clsx(css.crumb, last && css.crumbCurrent)}
-                      disabled={last}
-                      onClick={() => { open(summary.id) }}
-                    >
-                      {summary.displayTitle}
-                    </button>
-                  </span>
-                )
-              })}
-              {ancestry.length === 0 && <span className={css.crumbCurrent}>{sessionId}</span>}
-            </nav>
-            <div className={css.headerActions}>
-              {renderSlot('conversation.session.header.actions', {})}
+            <div className={css.titleCluster}>
+              <nav className={css.crumbs} aria-label={t('session.hierarchy')}>
+                {ancestry.map((summary, index) => {
+                  const last = index === ancestry.length - 1
+                  return (
+                    <span key={summary.id} className={css.crumbSeg}>
+                      {index > 0 && <span className={css.crumbSep}>/</span>}
+                      <button
+                        type="button"
+                        className={clsx(css.crumb, last && css.crumbCurrent)}
+                        disabled={last}
+                        onClick={() => { open(summary.id) }}
+                      >
+                        {summary.displayTitle}
+                      </button>
+                    </span>
+                  )
+                })}
+                {ancestry.length === 0 && <span className={css.crumbCurrent}>{sessionId}</span>}
+              </nav>
+              <div className={css.headerActions}>
+                {renderSlot('conversation.session.header.actions', {})}
+              </div>
+            </div>
+            <div className={css.headerUtilities}>
+              {renderSlot('conversation.session.header.utilities', {})}
            </div>
          </div>
          {tabs.length > 1 && (
@@ -337,6 +337,8 @@ describe('ConversationRoot resident composer', () => {
    expect(host?.contains(header)).toBe(false)
    expect(host?.contains(seat)).toBe(true)
    expect(seat?.contains(textarea)).toBe(true)
+    expect(b.slotCalls).toContain('conversation.session.header.actions')
+    expect(b.slotCalls).toContain('conversation.session.header.utilities')
  })

  it('sticky composer seat wraps the whole overlay chain, not only the fallback stack', () => {
@@ -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 packages/client/ui-settings-general/README.md
-README.md: d8578a7fbd451c1b7ec54dadeb3d391d597cc18e
-README.zh.md: 246c04193e79f46f1e8035c6a40f55a20f1d0c26
+README.md: d02230d281482d03545a7dd9bb06fd5f1085d017
+README.zh.md: 9e2011902227c8d656f57813d4ecec92147d0f6f
@@ -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 packages/client/ui-trajectory/README.md
-README.md: f4b3bd223c2872f0341d49bdaa102440d73b4f29
-README.zh.md: 9bcb3b6ad98d672cc524c168f2024be9ba56b577
+README.md: d3786b6460c5df7eaa6d24e68c80025e7fb29ae4
+README.zh.md: 5eb1451b9a3a9896d5486fcf5c8d9cf30d6159a0
@@ -2,7 +2,7 @@

 English | [中文](README.zh.md)

-Trajectory renders a turn-aware event ledger with selectable User, Assistant, Tool, and nested Subtool records. Thick rules mark Turn boundaries, compact inline markers identify Steps, and the main ledger keeps only index, event, and content; selection opens a local inspector for token usage, duration, Input, Output, and Timing. Scrollable Summary regions keep their scrollbar thumbs transparent until the region is hovered or contains keyboard focus, without changing the reserved scroll geometry. A standalone compaction request appears chronologically in its own `Between turns` section, while a numbered compaction remains inside its owning turn. Long ledgers open at the current tail, load one older page when the user reaches the loaded range's top, and mount only the visible row window plus a small overscan; request-only separators share the next measurable virtual item, while semantic row keys and ARIA indexes survive prepends. Selection, timeline navigation, folding, search, and Request totals cover the currently loaded window. The ledger covers records with an explicit loading row until the initial tail is positioned and while an older page is pending. A fixed Overview above the ledger projects real record start/duration timing from left to right; when earlier records remain unloaded and the viewport includes the loaded domain's start, a neutral ellipsis control identifies the omitted prefix and loads one earlier page without assigning unknown history fabricated duration. Assistant spans divide recorded TTFT from decoding, and a 500 ms hover reveals exact clock and duration details. Dragging an interval focuses the ledger on every record active at any point in that inclusive range, while clearing the selection restores the full loaded ledger. Wheel gestures zoom the time domain. A right-button click clears the selected interval, while a right-button drag pans an already zoomed viewport without changing it. The initial view and streaming updates stay at the tail; scrolling upward suspends following so new records do not interrupt inspection of earlier rows. Content-only stream frames preserve virtual row keys and heights, reuse measurements, and do not issue repeated tail-scroll writes. The toolbar's Export button hands the session log — the root plus every subagent descendant — directly to the browser download manager as a ZIP streamed by the host (`GET /api/session.export`), so JavaScript never buffers the response: every file is the session's stored artifact text verbatim (`session.jsonl` at the root, `subagents/<id>/session.jsonl` for descendants; no manifest, byte-identical to the backend's durable artifact), and every image any included log references sits under `media/<attachmentId>.<ext>`. Fixture mode (no host) answers 404 for the export. Completed replies retain assembled blocks, timing, and usage in Trajectory target State, while the shared Session window keeps the raw Events. Trajectory asks the conversation shell to float the composer over the full-height ledger, while its responsive vertical scrollers reserve the composer's live height so final rows remain reachable. Trajectory-owned Definitions assemble business records, including cancellation-frozen Assistant and Tool records, from the shared Session window, so Trajectory neither reads nor changes the Chat conversation snapshot. The package provides no service and declares no Context merge; it registers target-specific Event Definitions, a Trajectory view builder, and one tab in the conversation's `'conversation.view'` slot ring. Contract: api-contracts v3 §8.
+Trajectory renders a turn-aware event ledger with selectable User, Assistant, Tool, and nested Subtool records. Thick rules mark Turn boundaries, compact inline markers identify Steps, and the main ledger keeps only index, event, and content; selection opens a local inspector for token usage, duration, Input, Output, and Timing. Scrollable Summary regions keep their scrollbar thumbs transparent until the region is hovered or contains keyboard focus, without changing the reserved scroll geometry. A standalone compaction request appears chronologically in its own `Between turns` section, while a numbered compaction remains inside its owning turn. Long ledgers open at the current tail, load one older page when the user reaches the loaded range's top, and mount only the visible row window plus a small overscan; request-only separators share the next measurable virtual item, while semantic row keys and ARIA indexes survive prepends. Selection, timeline navigation, folding, search, and Request totals cover the currently loaded window. The ledger covers records with an explicit loading row until the initial tail is positioned and while an older page is pending. A fixed Overview above the ledger projects real record start/duration timing from left to right; when earlier records remain unloaded and the viewport includes the loaded domain's start, a neutral ellipsis control identifies the omitted prefix and loads one earlier page without assigning unknown history fabricated duration. Assistant spans divide recorded TTFT from decoding, and a 500 ms hover reveals exact clock and duration details. Dragging an interval focuses the ledger on every record active at any point in that inclusive range, while clearing the selection restores the full loaded ledger. Wheel gestures zoom the time domain. A right-button click clears the selected interval, while a right-button drag pans an already zoomed viewport without changing it. The initial view and streaming updates stay at the tail; scrolling upward suspends following so new records do not interrupt inspection of earlier rows. Content-only stream frames preserve virtual row keys and heights, reuse measurements, and do not issue repeated tail-scroll writes. Completed replies retain assembled blocks, timing, and usage in Trajectory target State, while the shared Session window keeps the raw Events. Trajectory asks the conversation shell to float the composer over the full-height ledger, while its responsive vertical scrollers reserve the composer's live height so final rows remain reachable. Trajectory-owned Definitions assemble business records, including cancellation-frozen Assistant and Tool records, from the shared Session window, so Trajectory neither reads nor changes the Chat conversation snapshot. The package provides no service and declares no Context merge; it registers target-specific Event Definitions, a Trajectory view builder, and one tab in the conversation's `'conversation.view'` slot ring. Contract: api-contracts v3 §8.

 ## Model Experience

@@ -2,7 +2,7 @@

 [English](README.md) | 中文

-Trajectory 渲染按轮次组织的事件记录表，其中可选择用户、助手、工具和嵌套子工具记录。较粗的分割线标示轮次边界，紧凑的行内标记标识步骤，主记录表仅保留索引、事件和内容；选择记录则会打开局部检查器，查看 token 用量、耗时、输入、输出和计时。可滚动的概述区域默认保持滚动条滑块透明，直到鼠标悬停该区域或其中包含键盘焦点时才显示，同时不改变滚动条预留的几何空间。独立运行的压缩（compaction）请求会按时间顺序显示在自己的 `Between turns` 区段中，而带编号的压缩仍位于其所属轮次内。长记录表打开时定位于当前尾部，用户到达已加载范围顶部时加载一页更早的历史，并且只挂载可见行窗口和少量额外缓冲行；仅含请求的分隔行并入下一个具备可测高度的虚拟项，语义行键和 ARIA 索引在向前补页后保持不变。选择、时间线导航、折叠、搜索和请求汇总只覆盖当前已加载的窗口。初始尾部完成定位前以及更早页面仍在等待时，记录表会用明确的加载行遮住真实记录。固定在记录表上方的 Overview 区域从左到右投影记录的真实开始时间与耗时；仍有更早记录未加载且 viewport 包含已加载时间域起点时，中性的省略号控件会标识被省略的前缀，并可加载一页更早历史，而不会为未知部分虚构耗时。助手时间条会区分记录到的 TTFT 与解码时间，悬停 500 ms 后可查看精确时刻和耗时详情。拖选一个区间会将记录表聚焦到活动区间与该闭区间有重叠的所有记录，清除选择则恢复完整的已加载记录表。滚轮手势用于缩放时间域。右键单击会清除所选区间；在已放大的 viewport 上按住右键拖动则只会平移视图，不会改变该区间。初始视图和流式更新都会停留在尾部；向上滚动会暂停跟随，因此新记录不会打断对旧记录的检查。仅含内容更新的流式帧会保持虚拟行的键和高度不变、复用测量结果，并且不会重复写入末尾滚动位置。工具栏的 “Export” 按钮会将会话日志——根会话及其全部子代理——作为宿主流式返回的 ZIP（`GET /api/session.export`）直接交给浏览器下载管理器，因此 JavaScript 不会缓冲响应：每个文件都是会话存储工件的逐字原文（根为 `session.jsonl`，子代理为 `subagents/<id>/session.jsonl`；无清单，与后端持久化工件逐字节一致），每个被包含日志引用的图片则放在 `media/<attachmentId>.<ext>` 下。fixture 模式（无宿主）对导出应答 404。已完成的回复会在 Trajectory target State 中保留组装后的 blocks、计时与用量，共享 Session 窗口则保留原始 Event。Trajectory 要求会话壳将 composer 作为浮层置于全高记录表上方；其响应式纵向滚动容器会预留 composer 的实时高度，确保仍可滚动到最后几行。Trajectory 自有的 Definition 从共享 Session 窗口组装业务记录，其中包括因取消而冻结的助手和工具记录，因此 Trajectory 既不读取也不改变 Chat 会话快照。该包不提供 service，也不声明 Context 合并；它会注册 target 专属 Event Definition、Trajectory view builder，以及会话 `'conversation.view'` slot 环中的一个视图标签页。约定：api-contracts v3 §8。
+Trajectory 渲染按轮次组织的事件记录表，其中可选择用户、助手、工具和嵌套子工具记录。较粗的分割线标示轮次边界，紧凑的行内标记标识步骤，主记录表仅保留索引、事件和内容；选择记录则会打开局部检查器，查看 token 用量、耗时、输入、输出和计时。可滚动的概述区域默认保持滚动条滑块透明，直到鼠标悬停该区域或其中包含键盘焦点时才显示，同时不改变滚动条预留的几何空间。独立运行的压缩（compaction）请求会按时间顺序显示在自己的 `Between turns` 区段中，而带编号的压缩仍位于其所属轮次内。长记录表打开时定位于当前尾部，用户到达已加载范围顶部时加载一页更早的历史，并且只挂载可见行窗口和少量额外缓冲行；仅含请求的分隔行并入下一个具备可测高度的虚拟项，语义行键和 ARIA 索引在向前补页后保持不变。选择、时间线导航、折叠、搜索和请求汇总只覆盖当前已加载的窗口。初始尾部完成定位前以及更早页面仍在等待时，记录表会用明确的加载行遮住真实记录。固定在记录表上方的 Overview 区域从左到右投影记录的真实开始时间与耗时；仍有更早记录未加载且 viewport 包含已加载时间域起点时，中性的省略号控件会标识被省略的前缀，并可加载一页更早历史，而不会为未知部分虚构耗时。助手时间条会区分记录到的 TTFT 与解码时间，悬停 500 ms 后可查看精确时刻和耗时详情。拖选一个区间会将记录表聚焦到活动区间与该闭区间有重叠的所有记录，清除选择则恢复完整的已加载记录表。滚轮手势用于缩放时间域。右键单击会清除所选区间；在已放大的 viewport 上按住右键拖动则只会平移视图，不会改变该区间。初始视图和流式更新都会停留在尾部；向上滚动会暂停跟随，因此新记录不会打断对旧记录的检查。仅含内容更新的流式帧会保持虚拟行的键和高度不变、复用测量结果，并且不会重复写入末尾滚动位置。已完成的回复会在 Trajectory target State 中保留组装后的 blocks、计时与用量，共享 Session 窗口则保留原始 Event。Trajectory 要求会话壳将 composer 作为浮层置于全高记录表上方；其响应式纵向滚动容器会预留 composer 的实时高度，确保仍可滚动到最后几行。Trajectory 自有的 Definition 从共享 Session 窗口组装业务记录，其中包括因取消而冻结的助手和工具记录，因此 Trajectory 既不读取也不改变 Chat 会话快照。该包不提供 service，也不声明 Context 合并；它会注册 target 专属 Event Definition、Trajectory view builder，以及会话 `'conversation.view'` slot 环中的一个视图标签页。约定：api-contracts v3 §8。

 ## 模型体验

@@ -164,46 +164,6 @@
  font: 14px/14px var(--ds-font-family-code);
 }

-.export {
-  display: inline-flex;
-  flex: none;
-  align-items: center;
-  height: 20px;
-  padding: 0 7px;
-  gap: 4px;
-  border: 0;
-  border-radius: 3px;
-  color: var(--dsw-alias-label-tertiary);
-  background: transparent;
-  cursor: pointer;
-  font: var(--dsw-font-xxs-12);
-}
-
-.export:hover:not(:disabled) {
-  color: var(--dsw-alias-label-primary);
-  background: var(--dsw-alias-interactive-bg-hover);
-}
-
-.export:focus-visible {
-  outline: 1px solid var(--dsw-alias-state-business-primary);
-  outline-offset: 1px;
-}
-
-.export:disabled {
-  color: var(--dsw-alias-label-dimmed);
-  cursor: wait;
-}
-
-.exportIcon {
-  flex: none;
-  width: 12px;
-  height: 12px;
-  stroke: currentColor;
-  stroke-width: 1.25;
-  stroke-linecap: round;
-  stroke-linejoin: round;
-}
-
 .search {
  display: flex;
  flex: 0 1 164px;
@@ -26,12 +26,6 @@ export interface TrajectoryToolbarProps {
  searchQuery: string
  /** Update the live ledger search query. */
  onSearchQueryChange: (query: string) => void
-  /** Whether the session-log export is in flight. */
-  exporting: boolean
-  /** Trigger the session-log export download. */
-  onExport: () => void
-  /** Export failure message, shown while set; null while idle or successful. */
-  exportError: string | null
  /** Translate a toolbar dictionary key. */
  t: TranslateNS<typeof NS>
 }
@@ -52,9 +46,6 @@ export function TrajectoryToolbar({
  onToggleAllAssistants,
  searchQuery,
  onSearchQueryChange,
-  exporting,
-  onExport,
-  exportError,
  t,
 }: TrajectoryToolbarProps) {
  return (
@@ -119,20 +110,6 @@ export function TrajectoryToolbar({
            </span>
            {t('toolbar.calls')}
          </button>
-          <button
-            type="button"
-            className={css.export}
-            aria-label={t('toolbar.exportAria')}
-            title={exportError ?? (exporting ? t('toolbar.exporting') : t('toolbar.exportTitle'))}
-            disabled={exporting}
-            onClick={onExport}
-          >
-            <svg className={css.exportIcon} viewBox="0 0 16 16" fill="none" aria-hidden="true">
-              <path d="M8 3v7m0 0 3-3m-3 3L5 7" />
-              <path d="M3 11.5V13a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1v-1.5" />
-            </svg>
-            {t('toolbar.export')}
-          </button>
        </div>
        <div className={css.search}>
          <IconSearchOutline16 size={11} className={css.searchIcon} />
@@ -71,8 +71,6 @@ export interface TrajectoryViewInjected {
  }
  loadOlder: () => Promise<boolean>
  setActualDuration: (actualDuration: boolean) => void
-  /** Download the session log (including subagent logs) as a ZIP archive; rejects on failure. */
-  exportLog: () => Promise<void>
 }

 interface UsageLike {
@@ -120,7 +118,7 @@ function addUsage(
 }

 export function TrajectoryView({
-  useSession, useDuration, loadOlder, setActualDuration, exportLog,
+  useSession, useDuration, loadOlder, setActualDuration,
  inspect, onInspectDone, t,
 }: ConvViewProps & InjectFace<TrajectoryViewInjected> & PropsLocale<'trajectory'>) {
  const [collapsedTurns, setCollapsedTurns] = useState<ReadonlySet<number>>(EMPTY_TURN_IDS)
@@ -130,8 +128,6 @@ export function TrajectoryView({
  const actualDuration = useDuration(value => value)
  const [actualTime, setActualTime] = useState(false)
  const [searchQuery, setSearchQuery] = useState('')
-  const [exporting, setExporting] = useState(false)
-  const [exportError, setExportError] = useState<string | null>(null)
  const [searchIndex] = useState(() => new TrajectorySearchIndex())
  const [searchIndexRevision, setSearchIndexRevision] = useState(0)
  const searchIndexTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
@@ -447,19 +443,6 @@ export function TrajectoryView({
    return loadOlder()
  }, [loadOlder])

-  const onExport = useCallback(() => {
-    if (exporting) return
-    setExporting(true)
-    setExportError(null)
-    void exportLog().then(
-      () => { setExporting(false) },
-      (error: unknown) => {
-        setExportError(error instanceof Error ? error.message : String(error))
-        setExporting(false)
-      },
-    )
-  }, [exportLog, exporting])
-
  return (
    <div className={css.root} data-conversation-composer-overlay="">
      <TrajectoryToolbar
@@ -479,16 +462,8 @@ export function TrajectoryView({
        onToggleAllAssistants={toggleAllAssistants}
        searchQuery={searchQuery}
        onSearchQueryChange={setSearchQuery}
-        exporting={exporting}
-        onExport={onExport}
-        exportError={exportError}
        t={t}
      />
-      {exportError !== null && (
-        <div className={css.exportError} role="alert">
-          {exportError}
-        </div>
-      )}
      <TrajectoryTimeline
        turns={timelineTurns}
        mode={timelineMode}
@@ -1,45 +0,0 @@
-/**
- * Session log export delivery. The host streams the archive from
- * `GET /api/session.export`; this module owns the browser-native download
- * handoff so the browser can stream the response directly to its download
- * manager instead of buffering the ZIP in JavaScript.
- * @module
- */
-
-/**
- * Collapse an untrusted session id into one safe path/filename segment.
- * Distinct ids may collapse onto one segment (impossible for the host-minted
- * UUIDs, so no uniqueness suffix is kept).
- * @param id - the raw session id.
- * @returns a filesystem-safe single segment.
- */
-function safeSessionIdSegment(id: string): string {
-  return id.replace(/[^A-Za-z0-9_-]/g, '_')
-}
-
-/**
- * The export archive filename for one session (same convention the host's
- * Content-Disposition uses).
- * @param sessionId - the root session id.
- * @returns the download filename.
- */
-export function sessionLogZipFilename(sessionId: string): string {
-  return `dsh-session-${safeSessionIdSegment(sessionId)}.zip`
-}
-
-/**
- * Hand one host-streamed session archive to the browser download manager.
- * The operation resolves after dispatching the native download; HTTP delivery
- * continues outside JavaScript and is reported by the browser itself.
- * @param sessionId - the root session id to export with all descendants.
- * @returns a promise that rejects if the browser handoff itself fails.
- */
-export function downloadSessionLog(sessionId: string): Promise<void> {
-  return Promise.resolve().then(() => {
-    const query = new URLSearchParams({ sessionId, includeDescendants: 'true' })
-    const anchor = document.createElement('a')
-    anchor.href = `/api/session.export?${query.toString()}`
-    anchor.download = sessionLogZipFilename(sessionId)
-    anchor.click()
-  })
-}
@@ -10,7 +10,6 @@ import type {} from '@deepseek-ai/dsh-client-locale/client'
 // owning package) must be in the program for the register calls to type.
 import type {} from '@deepseek-ai/dsh-client-ui-conversation/client'
 import { createTrajectoryDurationStore } from './duration-store.ts'
-import { downloadSessionLog } from './export-log.ts'
 import { en, NS, zh } from './locales.ts'
 import { registerTrajectoryAssistantDefinition } from './trajectory-assistant-definition.ts'
 import { registerTrajectoryCompactionDefinitions } from './trajectory-compaction-definition.ts'
@@ -60,7 +59,6 @@ export function apply(ctx: Context): void {
          return session.getSnapshot().views.get('trajectory') !== before
        },
        setActualDuration: (value) => { duration.set(value) },
-        exportLog: () => downloadSessionLog(sessionId),
      }
    },
  }, TrajectoryView))
@@ -17,10 +17,6 @@ export type TrajectoryKey =
  | 'toolbar.calls'
  | 'toolbar.expandCalls'
  | 'toolbar.collapseCalls'
-  | 'toolbar.export'
-  | 'toolbar.exportAria'
-  | 'toolbar.exporting'
-  | 'toolbar.exportTitle'
  | 'toolbar.search'
  | 'toolbar.searchPlaceholder'

@@ -45,10 +41,6 @@ export const zh: Record<TrajectoryKey, string> = {
  'toolbar.calls': 'Calls',
  'toolbar.expandCalls': 'Expand calls',
  'toolbar.collapseCalls': 'Collapse calls',
-  'toolbar.export': 'Export',
-  'toolbar.exportAria': 'Export session log',
-  'toolbar.exporting': 'Exporting…',
-  'toolbar.exportTitle': 'Export session log (ZIP, includes subagents)',
  'toolbar.search': '搜索轨迹',
  'toolbar.searchPlaceholder': '搜索',
 }
@@ -67,10 +59,6 @@ export const en: Record<TrajectoryKey, string> = {
  'toolbar.calls': 'Calls',
  'toolbar.expandCalls': 'Expand calls',
  'toolbar.collapseCalls': 'Collapse calls',
-  'toolbar.export': 'Export',
-  'toolbar.exportAria': 'Export session log',
-  'toolbar.exporting': 'Exporting…',
-  'toolbar.exportTitle': 'Export session log (ZIP, includes subagents)',
  'toolbar.search': 'Search trajectory',
  'toolbar.searchPlaceholder': 'Search',
 }
@@ -13,18 +13,6 @@
  background: var(--dsw-alias-bg-layer-1);
 }

-.exportError {
-  box-sizing: border-box;
-  flex: none;
-  width: 100%;
-  padding: 4px 10px;
-  border-bottom: 1px solid var(--dsw-alias-border-l2);
-  color: var(--dsw-alias-label-danger, var(--dsw-alias-label-primary));
-  background: var(--dsw-alias-bg-layer-2);
-  font: var(--dsw-font-xxs-12);
-  overflow-wrap: anywhere;
-}
-
 .ledger {
  position: relative;
  z-index: 0;
@@ -1,51 +0,0 @@
-// @vitest-environment jsdom
-/**
- * Session-log export browser delivery: safe filename derivation and a native
- * download handoff that leaves the streamed response outside JavaScript.
- */
-
-import { afterEach, describe, expect, it, vi } from 'vitest'
-import { downloadSessionLog, sessionLogZipFilename } from '../src/client/export-log.ts'
-
-afterEach(() => {
-  vi.restoreAllMocks()
-})
-
-describe('sessionLogZipFilename', () => {
-  it('keeps safe session ids verbatim', () => {
-    expect(sessionLogZipFilename('session-abc_1-2')).toBe('dsh-session-session-abc_1-2.zip')
-  })
-
-  it('neutralizes unsafe id characters that could shape the filename', () => {
-    expect(sessionLogZipFilename('../evil')).toBe('dsh-session-___evil.zip')
-    expect(sessionLogZipFilename('a/b')).toBe('dsh-session-a_b.zip')
-  })
-
-  it('strips dots so a dot-only id cannot shape a dot segment', () => {
-    expect(sessionLogZipFilename('..')).toBe('dsh-session-__.zip')
-  })
-})
-
-describe('downloadSessionLog', () => {
-  it('hands the descendant-inclusive endpoint directly to the browser', async () => {
-    const click = vi.spyOn(HTMLAnchorElement.prototype, 'click').mockImplementation(() => {})
-
-    await downloadSessionLog('session/with spaces')
-
-    expect(click).toHaveBeenCalledOnce()
-    const anchor = click.mock.contexts[0] as HTMLAnchorElement
-    const url = new URL(anchor.href)
-    expect(url.pathname).toBe('/api/session.export')
-    expect(url.searchParams.get('sessionId')).toBe('session/with spaces')
-    expect(url.searchParams.get('includeDescendants')).toBe('true')
-    expect(anchor.download).toBe('dsh-session-session_with_spaces.zip')
-  })
-
-  it('rejects when the browser download handoff fails', async () => {
-    vi.spyOn(HTMLAnchorElement.prototype, 'click').mockImplementation(() => {
-      throw new Error('download denied')
-    })
-
-    await expect(downloadSessionLog('session-root')).rejects.toThrow('download denied')
-  })
-})
@@ -1,61 +0,0 @@
-// @vitest-environment jsdom
-/** Trajectory toolbar export button: click dispatch, in-flight disable, and error surfacing. */
-
-import { afterEach, describe, expect, it, vi } from 'vitest'
-import { cleanup, fireEvent, render, screen } from '@testing-library/react'
-import type { LocaleKeysOf } from '@deepseek-ai/dsh-client-ui-slots'
-import { TrajectoryToolbar, type TrajectoryToolbarProps } from '../src/client/TrajectoryToolbar.tsx'
-import { zh, type TrajectoryKey } from '../src/client/locales.ts'
-
-/** Test translator pinned to the Simplified Chinese dictionary. */
-const zhT = (key: LocaleKeysOf<'trajectory'>): string => zh[key as TrajectoryKey] ?? key
-
-afterEach(() => {
-  cleanup()
-  vi.restoreAllMocks()
-})
-
-function baseProps(overrides: Partial<TrajectoryToolbarProps> = {}): TrajectoryToolbarProps {
-  return {
-    actualDuration: false,
-    onActualDurationChange: vi.fn(),
-    actualTime: false,
-    onActualTimeChange: vi.fn(),
-    allTurnsCollapsed: false,
-    onToggleAllTurns: vi.fn(),
-    allAssistantsCollapsed: false,
-    onToggleAllAssistants: vi.fn(),
-    searchQuery: '',
-    onSearchQueryChange: vi.fn(),
-    exporting: false,
-    onExport: vi.fn(),
-    exportError: null,
-    t: zhT,
-    ...overrides,
-  }
-}
-
-describe('TrajectoryToolbar export', () => {
-  it('renders the export button and dispatches the export callback on click', () => {
-    const onExport = vi.fn()
-    render(<TrajectoryToolbar {...baseProps({ onExport })} />)
-    const button = screen.getByRole('button', { name: 'Export session log' })
-    fireEvent.click(button)
-    expect(onExport).toHaveBeenCalledTimes(1)
-  })
-
-  it('disables the button while an export is in flight and blocks dispatch', () => {
-    const onExport = vi.fn()
-    render(<TrajectoryToolbar {...baseProps({ exporting: true, onExport })} />)
-    const button = screen.getByRole('button', { name: 'Export session log' }) as HTMLButtonElement
-    expect(button.disabled).toBe(true)
-    fireEvent.click(button)
-    expect(onExport).not.toHaveBeenCalled()
-  })
-
-  it('surfaces an export failure as the button title', () => {
-    render(<TrajectoryToolbar {...baseProps({ exportError: 'Export failed: internal boom' })} />)
-    const button = screen.getByRole('button', { name: 'Export session log' })
-    expect(button.title).toBe('Export failed: internal boom')
-  })
-})
@@ -136,12 +136,6 @@ function standaloneDuration(): Pick<
  }
 }

-function standaloneExport(
-  onExport: () => Promise<void> = vi.fn(() => Promise.resolve()),
-): Pick<ComponentProps<typeof TrajectoryView>, 'exportLog'> {
-  return { exportLog: onExport }
-}
-
 function fakeSession(nodes: ConversationSnapshot['nodes']) {
  const store = createSnapshotStore(historySnapshot(nodes))
  return { store, useSession: bindSnapshotSelector(store) }
@@ -253,7 +247,6 @@ function mount(slots: SlotsService, nodes: ConversationSnapshot['nodes'] = NODES
        return {
          loadOlder: trajectory.loadOlder,
          setActualDuration: trajectory.setActualDuration,
-          exportLog: trajectory.exportLog,
          useDuration: bindSnapshotSelector(trajectory.hooks.duration),
          t: (key: TrajectoryKey) => zh[key],
        }
@@ -1134,7 +1127,6 @@ describe('timeline projection', () => {
        ...standaloneProps([]),
        ...standaloneHistory(historySnapshot([])),
        ...standaloneDuration(),
-        ...standaloneExport(),
      },
    ))
    expect(screen.getByRole('toolbar', { name: '轨迹工具栏' })).toBeTruthy()
@@ -1142,41 +1134,6 @@ describe('timeline projection', () => {
  })
 })

-describe('session log export', () => {
-  afterEach(() => {
-    vi.unstubAllGlobals()
-    Reflect.deleteProperty(HTMLAnchorElement.prototype, 'click')
-  })
-
-  it('downloads the host-streamed ZIP with descendants on click', async () => {
-    const clickAnchor = vi.fn()
-    HTMLAnchorElement.prototype.click = clickAnchor
-    const b = await bench(historySnapshot(NODES))
-    mount(b.slots)
-    fireEvent.click(screen.getByRole('tab', { name: 'Trajectory' }))
-    fireEvent.click(screen.getByRole('button', { name: 'Export session log' }))
-    await vi.waitFor(() => { expect(clickAnchor).toHaveBeenCalledOnce() })
-    const anchor = clickAnchor.mock.contexts[0] as HTMLAnchorElement
-    const url = new URL(anchor.href)
-    expect(url.pathname).toBe('/api/session.export')
-    expect(url.searchParams.get('sessionId')).toBe(SID)
-    expect(url.searchParams.get('includeDescendants')).toBe('true')
-  })
-
-  it('surfaces a browser handoff failure in the visible alert bar', async () => {
-    HTMLAnchorElement.prototype.click = vi.fn(() => { throw new Error('download denied') })
-    const b = await bench(historySnapshot(NODES))
-    mount(b.slots)
-    fireEvent.click(screen.getByRole('tab', { name: 'Trajectory' }))
-    fireEvent.click(screen.getByRole('button', { name: 'Export session log' }))
-    await vi.waitFor(() => {
-      const alert = screen.queryByRole('alert')
-      expect(alert).not.toBeNull()
-      expect(alert!.textContent).toContain('download denied')
-    })
-  })
-})
-
 describe('TrajectoryView state', () => {
  it('persists the duration preference through the runtime snapshot-store seam', () => {
    const firstDuration = createTrajectoryDurationStore()
@@ -1187,7 +1144,6 @@ describe('TrajectoryView state', () => {
    const first = render(
      <TrajectoryView
        {...commonProps}
-        {...standaloneExport()}
        useDuration={bindSnapshotSelector(firstDuration)}
        setActualDuration={(value) => { firstDuration.set(value) }}
      />,
@@ -1203,7 +1159,6 @@ describe('TrajectoryView state', () => {
    render(
      <TrajectoryView
        {...commonProps}
-        {...standaloneExport()}
        useDuration={bindSnapshotSelector(restoredDuration)}
        setActualDuration={(value) => { restoredDuration.set(value) }}
      />,
@@ -1228,7 +1183,6 @@ describe('TrajectoryView state', () => {
      <TrajectoryView
        {...standaloneProps([])}
        {...standaloneDuration()}
-        {...standaloneExport()}
        useSession={bindSnapshotSelector(store)}
        loadOlder={vi.fn(() => Promise.resolve(false))}
      />,
@@ -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 packages/host/apiproxy/README.md
-README.md: 059c3eacbcd47bfc39820ab3db5545dbc2e2ccb8
-README.zh.md: 17bbad0094bfac49d63d6076a01d4c5cd2c5aa6b
+README.md: a40cc52e5caf1e4557d17e9fd2c1ac589dce30dd
+README.zh.md: 9dbc1cc482d1a0e8756eaa0dab3f2c0e62c07336
@@ -28,7 +28,7 @@ Question responses are validated against their pending request before the first

 `session.history`'s tail page (`beforeSeq` absent) additionally carries an optional `projections` block — the watermark snapshot of every unit registered on `ctx.sessionProjections` (`@deepseek-ai/dsh-session-projection`), with `asOfSeq` = the last event seq the values reflect (`-1` on an empty log). The gateway also subscribes to the registry's change feed and mints a `session/projection` mux frame per changed unit (`{sessionId, key, value, seq}` — live push state, never logged; clients hold one generic per-session value store under higher-seq-wins). The carrier holds no other domain's knowledge (each value passed its unit's own schema inside the registry; the wire schemas keep `values`/`value` wide); loadOlder pages never carry the block, and a composition without the registry serves histories without either surface. The gateway registers exactly one unit of its own: `imageLimits`, the attachments config it enforces at prompt admission, published as a per-boot constant (`apply` keeps the state reference, so baselines alone carry it — no change frames) so clients can refuse an over-limit intake before submit and label upload affordances; the unit activates only while both the registry and the attachments service are composed.

-Session-log export is a host-only download surface, not an RPC: `GET /api/session.export?sessionId=…&includeDescendants=true` streams a ZIP whose files are each session's stored artifact text verbatim (the persistence backend's `readRaw` — exact durable bytes decoded from the physical encoding, never a reconstruction from parsed events), root under its original base name plus each subagent descendant under `subagents/<id>/`, and every image any included log references under `media/<attachmentId>.<ext>` (read and verified from the attachment store; a shared image appears once). Each live root or descendant crosses the authoritative `SessionStore.flush` durability barrier immediately before its raw artifact read; cold sessions have no in-memory work to flush. Compression runs on the host with fflate's streaming Zip API at validated `sessionExportCompressionLevel` 0–9 (default 6), so deployments can trade CPU and latency against archive size; the response is chunked as it is produced and the host never holds the whole archive in one buffer. Once the response queue reaches its 64 KiB byte high-water mark, production waits until consumer pull restores positive capacity; fflate's synchronous callback can overshoot that bound only by the output of one bounded input push. Request abort and response-body cancellation stop lineage and artifact work, terminate the active compressor, and propagate as cancellation rather than an HTTP 500. It requires the persistence, session-query, and attachment services: a deployment without any answers 500, a persistence backend without per-session raw artifacts answers 501, a missing root session answers 404, and a descendant without a stored artifact or a referenced image that cannot be read fails the stream (fail-loud, never silent under-export). The carrier mounts the endpoint; `ApiProxy.downloads.sessionLog` implements it.
+Session-log export is a host-only download surface, not an RPC: `GET /api/session.export?sessionId=…&includeDescendants=true` streams a ZIP whose files are each session's stored artifact text verbatim (the persistence backend's `readRaw` — exact durable bytes decoded from the physical encoding, never a reconstruction from parsed events), root under its original base name plus each subagent descendant under `subagents/<id>/`, and every image any included log references under `media/<attachmentId>.<ext>` (read and verified from the attachment store; a shared image appears once). `HEAD` runs the same root preparation and returns its status and headers without a response body, so browser clients can detect pre-stream failures before handing the GET to the native download manager. Each live root or descendant crosses the authoritative `SessionStore.flush` durability barrier immediately before its raw artifact read; cold sessions have no in-memory work to flush. Compression runs on the host with fflate's streaming Zip API at validated `sessionExportCompressionLevel` 0–9 (default 6), so deployments can trade CPU and latency against archive size; the response is chunked as it is produced and the host never holds the whole archive in one buffer. Once the response queue reaches its 64 KiB byte high-water mark, production waits until consumer pull restores positive capacity; fflate's synchronous callback can overshoot that bound only by the output of one bounded input push. Request abort and response-body cancellation stop lineage and artifact work, terminate the active compressor, and propagate as cancellation rather than an HTTP 500. It requires the persistence, session-query, and attachment services: a deployment without any answers 500, a persistence backend without per-session raw artifacts answers 501, a missing root session answers 404, and a descendant without a stored artifact or a referenced image that cannot be read fails the stream (fail-loud, never silent under-export). The carrier mounts the endpoint; `ApiProxy.downloads.sessionLog` implements it.

 Session titles ride the generic projection pair like every other domain — the history-tail `projections` block plus `session/projection` frames under the `title` key. Titles do not join `session.list`; cold sessions remain metadata-only there until opening or resuming attaches their logs. `session.rename` accepts an explicit user title (resuming a cold session first), delegating to `ctx.sessionTitle.rename` — the accepted `session/title` event pins the title against automatic regeneration — and returns the normalized title plus its event seq so a client settles its `title` projection cell ahead of the push frame; a title that normalizes to empty returns `title-invalid`.

@@ -28,7 +28,7 @@ Settings 分节中的 `reasoningEffort` 在 agent-default-model 插件配置中

 `session.history` 的尾页（不带 `beforeSeq`）额外携带一个可选的 `projections` 块——`ctx.sessionProjections`（`@deepseek-ai/dsh-session-projection`）上每个已注册单元的水位线快照，`asOfSeq` = 这些值共同反映到的最后一个事件 seq（空日志为 `-1`）。网关还订阅注册表的变更流，为每个状态发生变化的单元生成一个 `session/projection` mux 帧（`{sessionId, key, value, seq}`——实时推送状态，绝不入日志；客户端按 seq 高者胜维护一个按会话的通用值仓）。载体不持有其他领域的知识（每个值在注册表内部已过其单元自己的 schema；协议 schema 对 `values`/`value` 保持宽松）；loadOlder 页永不携带该块，未装注册表的组合则两个面都不提供。网关唯一自己注册的单元是 `imageLimits`：它在 prompt 准入时执行的 attachments 配置，以每次启动恒定的值发布（`apply` 保持状态引用不变，因此只靠基线携带、绝不产生变更帧），供客户端在提交前拒绝超限的加入并给上传入口标注上限；该单元仅在注册表与 attachments 服务同时组合时激活。

-会话日志导出是宿主侧的下载面，不是 RPC：`GET /api/session.export?sessionId=…&includeDescendants=true` 流式返回一个 ZIP，其中每个文件都是会话存储工件的逐字原文（持久化后端的 `readRaw`——按物理编码解码的确切持久化字节，绝非从解析后事件重建），根会话放在其原始基础文件名下，每个子代理后代放在 `subagents/<id>/` 下，每个被任何包含的日志引用的图片放在 `media/<attachmentId>.<ext>` 下（从附件存储读取并校验；共享图片只出现一次）。每个实时根会话或后代都会在读取原始工件前立即通过权威的 `SessionStore.flush` 持久性屏障；冷会话没有需要 flush 的内存工作。压缩在宿主侧使用 fflate 流式 Zip API 和已验证的 `sessionExportCompressionLevel` 0–9（默认 6），使部署可以在 CPU／延迟与归档大小之间取舍；响应边生成边分块写出，宿主从不把整个归档放进单个缓冲区。响应队列达到 64 KiB 字节高水位后，生产会等待 Consumer pull 恢复正容量；fflate 的同步回调最多只会让该界限多出一次有界输入 push 的输出。请求中止或响应 body 取消会停止血缘与工件工作、终止活跃压缩器，并继续按取消传播，而不会变成 HTTP 500。它要求同时挂载持久化、session-query 与附件服务：任一缺失应答 500，持久化后端不提供每会话原始工件时应答 501，根会话缺失时应答 404，后代缺少存储工件或引用的图片无法读取则整个流失败（fail-loud，绝不静默少导出）。端点由传输层挂载，`ApiProxy.downloads.sessionLog` 实现它。
+会话日志导出是宿主侧的下载面，不是 RPC：`GET /api/session.export?sessionId=…&includeDescendants=true` 流式返回一个 ZIP，其中每个文件都是会话存储工件的逐字原文（持久化后端的 `readRaw`——按物理编码解码的确切持久化字节，绝非从解析后事件重建），根会话放在其原始基础文件名下，每个子代理后代放在 `subagents/<id>/` 下，每个被任何包含的日志引用的图片放在 `media/<attachmentId>.<ext>` 下（从附件存储读取并校验；共享图片只出现一次）。`HEAD` 会执行相同的根工件准备，并在没有响应 body 的情况下返回状态与响应头，使浏览器 Client 可以在把 GET 交给原生下载管理器前发现流式传输前的失败。每个实时根会话或后代都会在读取原始工件前立即通过权威的 `SessionStore.flush` 持久性屏障；冷会话没有需要 flush 的内存工作。压缩在宿主侧使用 fflate 流式 Zip API 和已验证的 `sessionExportCompressionLevel` 0–9（默认 6），使部署可以在 CPU／延迟与归档大小之间取舍；响应边生成边分块写出，宿主从不把整个归档放进单个缓冲区。响应队列达到 64 KiB 字节高水位后，生产会等待 Consumer pull 恢复正容量；fflate 的同步回调最多只会让该界限多出一次有界输入 push 的输出。请求中止或响应 body 取消会停止血缘与工件工作、终止活跃压缩器，并继续按取消传播，而不会变成 HTTP 500。它要求同时挂载持久化、session-query 与附件服务：任一缺失应答 500，持久化后端不提供每会话原始工件时应答 501，根会话缺失时应答 404，后代缺少存储工件或引用的图片无法读取则整个流失败（fail-loud，绝不静默少导出）。端点由传输层挂载，`ApiProxy.downloads.sessionLog` 实现它。

 会话标题与其他所有领域一样搭乘这对通用投影机制——历史尾页的 `projections` 块外加 `title` 键下的 `session/projection` 帧。标题不会加入 `session.list`；冷会话在其中仍只有元数据，直到打开或恢复操作附加其日志。`session.rename` 接受用户显式标题（冷会话先恢复），委托给 `ctx.sessionTitle.rename`——被接受的 `session/title` 事件将标题钉住、不再被自动生成覆盖——并返回规范化后的标题及其事件 seq，让 client 在推送帧到达前就结算自己的 `title` 投影格；规范化后为空的标题返回 `title-invalid`。

@@ -1,5 +1,5 @@
 /**
- * downloads domain zod schemas. The GET download surface has no wire
+ * downloads domain zod schemas. The download surface has no wire
 * envelope: the request arrives as query parameters (all strings), so its
 * request schema parses the raw query-parameter object into the method's
 * exact request shape. SessionId brand cast point: sessionIdSchema, and only
@@ -249,7 +249,7 @@ export function toFetchHandler(api: ApiProxy): { fetch: typeof fetch } {
      const url = new URL(req.url)
      const path = url.pathname

-      // No-envelope GET channel surface (SSE streams + host-only download):
+      // No-envelope read channels (SSE GET streams + host-only download):
      // physical routes that answer directly, without a wire envelope.
      if (path === '/api/events.mux' && req.method === 'GET') {
        return sseResponse(api.events.mux({ rpcId: RpcId(randomUUID()), payload: {} }, req.signal))
@@ -257,14 +257,17 @@ export function toFetchHandler(api: ApiProxy): { fetch: typeof fetch } {
      if (path === '/api/events.host' && req.method === 'GET') {
        return sseResponse(api.events.host({ rpcId: RpcId(randomUUID()), payload: {} }, req.signal))
      }
-      if (path === '/api/session.export' && req.method === 'GET') {
+      if (path === '/api/session.export' && (req.method === 'GET' || req.method === 'HEAD')) {
        // Query params are a different boundary from the POST envelope, but
        // the request still casts its brands only through the domain schema.
        const parsed = sessionLogQuerySchema.safeParse(Object.fromEntries(url.searchParams))
        if (!parsed.success) {
          return new Response('missing or invalid sessionId query parameter', { status: 400 })
        }
-        return api.downloads.sessionLog(parsed.data, req.signal)
+        const response = await api.downloads.sessionLog(parsed.data, req.signal)
+        if (req.method === 'GET') return response
+        await response.body?.cancel()
+        return new Response(null, { status: response.status, headers: response.headers })
      }

      if (req.method !== 'POST' || !path.startsWith('/api/')) {
@@ -152,6 +152,30 @@ describe('session.export download endpoint', () => {
    expect(strFromU8(files['session.jsonl'] as Uint8Array)).toBe(artifact('session-root').content)
  })

+  it('preflights root preparation through HEAD without streaming a body', async () => {
+    const readRaw = vi.fn(async () => artifact('session-root'))
+    const api = await buildApi({}, [], { readRaw })
+    const response = await toFetchHandler(api).fetch(
+      new Request('http://host/api/session.export?sessionId=session-root', { method: 'HEAD' }),
+    )
+
+    expect(response.status).toBe(200)
+    expect(response.headers.get('content-type')).toBe('application/zip')
+    expect(response.headers.get('content-disposition')).toContain('dsh-session-session-root.zip')
+    expect(response.body).toBeNull()
+    expect(readRaw).toHaveBeenCalledOnce()
+  })
+
+  it('returns a bodyless preparation error from HEAD', async () => {
+    const api = await buildApi({})
+    const response = await toFetchHandler(api).fetch(
+      new Request('http://host/api/session.export?sessionId=session-root', { method: 'HEAD' }),
+    )
+
+    expect(response.status).toBe(404)
+    expect(response.body).toBeNull()
+  })
+
  it('uses the resolved compression level for ZIP entries', async () => {
    const root = artifact('session-root', undefined, 'compressible\n'.repeat(32 * 1024))
    const storedApi = await buildApi({ 'session-root': root }, [], { compressionLevel: 0 })
@@ -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 packages/session-query/README.md
-README.md: 3d5db8da74cb825c701fe50cf518505e9e6bcad9
-README.zh.md: fc430cbdc4130f77eb8857c4d88a2435ad0cc97f
+README.md: 90b105d44a2affd8d487db20dc51357425446f8b
+README.zh.md: 305223e77385f7ee640b54e1d03e8659967da43e
@@ -8,6 +8,7 @@ This family provides authorized retrieval over live and durable session logs, in
 |---|---|---|
 | [`session-query/`](session-query/README.md) | Defines trusted reads, relationship queries, and search operations | `ctx.sessionQuery` |
 | [`session-query-sqlite/`](session-query-sqlite/README.md) | Implements session queries with SQLite full-text search | `ctx.sessionQuery` |
+| [`session-export/`](session-export/README.md) | Adds the Web `/export` command, shared browser download state, and result modal over the Host ZIP endpoint | `ctx.sessionExport` |
 | [`tool-session-query/`](tool-session-query/README.md) | Exposes workspace-authorized session queries to the model | registers on `ctx.tools` |

 The subsystem reference — logical records, bounded reads, traces, filters, result pages — is [docs/subsystems/session-query.md](../../docs/subsystems/session-query.md).
@@ -8,6 +8,7 @@
 |---|---|---|
 | [`session-query/`](session-query/README.md) | 定义可信读取、关系查询和搜索操作 | `ctx.sessionQuery` |
 | [`session-query-sqlite/`](session-query-sqlite/README.md) | 使用 SQLite 全文搜索实现会话查询 | `ctx.sessionQuery` |
+| [`session-export/`](session-export/README.md) | 在 Host ZIP 端点之上增加 Web `/export` 命令、共享浏览器下载状态和结果弹窗 | `ctx.sessionExport` |
 | [`tool-session-query/`](tool-session-query/README.md) | 向模型公开经过工作区授权的会话查询 | 注册到 `ctx.tools` |

 子系统参考——逻辑记录、有界读取、追踪、筛选器、结果页——见 [docs/subsystems/session-query.md](../../docs/subsystems/session-query.md)。
--- a/Show More
+++ b/Show More