Merge master into docs/post-v3-release-proofreading

2026-08-12 20:48:08 +08:00
parent 3c6b6837a5 e7dbf6b9cf
commit 23e09ec08e
148 changed files with 2028 additions and 408 deletions
@@ -352,7 +352,7 @@ function fixtureUsage(turn: number, step: number): TokenUsage {
  }
 }

-/** fx-alpha history script: 74 turns (~150+ messages -> 4 pages at PAGE_MESSAGES=50),
+/** fx-alpha history script: 75 turns (~150+ messages -> 4 pages at PAGE_MESSAGES=50),
 *  mixing reasoning blocks / tool call+result / context. */
 function buildAlphaLog(): SessionEvent[] {
  const events: Record<string, unknown>[] = []
@@ -488,7 +488,7 @@ function buildAlphaLog(): SessionEvent[] {
    push({ type: 'step/end', data: { turn, step: 0 } })
    push({ type: 'turn/end', data: { turn, reason: { kind: 'completed' } } })
  }
-  // Turn 73: todo_write sample — the TodoRow toolview in the flow plus the
+  // Turn 74: todo_write sample — the TodoRow toolview in the flow plus the
  // todo/write snapshot event feeding the TodoPanel plan strip. Two items are
  // in_progress: this fixture chooses the parallel policy, so both surfaces
  // must render a parallel plan rather than the first active item alone.
@@ -547,20 +547,35 @@ function buildAlphaLog(): SessionEvent[] {
  toolTurn(70, 'web_search', '{"query":"deepseek harness architecture"}', 'Search results for deepseek harness architecture.')
  toolTurn(71, 'web_fetch', '{"url":"https://www.deepseek.com/blog/harness-architecture"}', '# Harness architecture\n\nEverything is a plugin.')

-  // Turn 72: user and assistant images share one durable fixture object.
-  // The todo turn remains last so its standing projection stays visible.
+  // Turn 72: max-tokens sample — the provider ends the turn at its output cap
+  // mid-sentence, so the chat flow must render the turn-max-tokens notice
+  // instead of ending silently. Ordered before the todo turn for the same
+  // standing-plan reason the bash turn is.
  push({ type: 'turn/start', data: { turn: 72 } })
+  push({ type: 'user/message', surfaceOp: 'append', data: userMessage(text('问题 72：请完整列出全部一百条条目。')) })
+  push({ type: 'step/start', data: { turn: 72, step: 0 } })
+  push({
+    type: 'assistant/message',
+    surfaceOp: 'append',
+    data: { turn: 72, step: 0, message: assistantMessage(text('条目 1：第一条。条目 2：第二条。条目 3：这一条写到一半被')) },
+  })
+  push({ type: 'step/end', data: { turn: 72, step: 0 } })
+  push({ type: 'turn/end', data: { turn: 72, reason: { kind: 'max-tokens' } } })
+
+  // Turn 73: user and assistant images share one durable fixture object.
+  // The todo turn remains last so its standing projection stays visible.
+  push({ type: 'turn/start', data: { turn: 73 } })
  push({
    type: 'user/message',
    surfaceOp: 'append',
    data: userMessage([{ type: 'image', attachment: FIXTURE_IMAGE_REF }, ...text('历史用户图片')]),
  })
-  push({ type: 'step/start', data: { turn: 72, step: 0 } })
+  push({ type: 'step/start', data: { turn: 73, step: 0 } })
  push({
    type: 'assistant/message',
    surfaceOp: 'append',
    data: {
-      turn: 72,
+      turn: 73,
      step: 0,
      message: assistantMessage(
        [...text('结构化模型图片：'), { type: 'image', attachment: FIXTURE_IMAGE_REF }],
@@ -568,11 +583,11 @@ function buildAlphaLog(): SessionEvent[] {
      ),
    },
  })
-  push({ type: 'step/end', data: { turn: 72, step: 0 } })
-  push({ type: 'turn/end', data: { turn: 72, reason: { kind: 'completed' } } })
+  push({ type: 'step/end', data: { turn: 73, step: 0 } })
+  push({ type: 'turn/end', data: { turn: 73, reason: { kind: 'completed' } } })

  const todoArgs = JSON.stringify({ todos: fixtureTodos })
-  toolTurn(73, 'todo_write', todoArgs, 'Updated todo list: 1 pending, 2 in progress, 1 completed.')
+  toolTurn(74, 'todo_write', todoArgs, 'Updated todo list: 1 pending, 2 in progress, 1 completed.')
  // The real tool appends the snapshot mid-execution — between tool/call and
  // tool/result — so the fixture reproduces that exact ordering (the last
  // toolTurn events run ... tool/call, tool/result, step/end, turn/end).
@@ -1444,7 +1459,7 @@ function createFixtureWorld(options: FixtureOptions): FixtureWorld {
    ['my-agent', { trust: 'user', content: "- id: tool-read\n  name: '@deepseek-ai/dsh-tool-read'\n" }],
  ])
  let fixtureDefaultPreset = 'standard'
-  const nextTurn = new Map<SessionId, number>([[sid('fx-alpha'), 74]])
+  const nextTurn = new Map<SessionId, number>([[sid('fx-alpha'), 75]])
  let nextSession = 1
  let nextRpc = 1
  let attachedSessions = options.empty ? 0 : 1
@@ -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/runtime/README.md
-README.md: 44fd9b84e45c0a4d7f5846ce9ba040ef41b8b446
-README.zh.md: 46120665e2720df7c0331b6bdea957316476a4a6
+README.md: 441f5462d98c8a9e92ebc9f08cdd7568e89fd427
+README.zh.md: f4ec9ac53c10f8f375c837556db7623c95d11c17
@@ -68,6 +68,8 @@ Every `ToolCallBlock` recursively owns its children through `subCalls`, in start

 The Host-owned LLM retry invariant validates provider-routed `llm/retry` and `llm/retry-started` records at the durable append boundary, including their identity, ordering, timer, integer, status, provider-delay, and non-empty diagnostic contracts. In the client, the Retry, Assistant, and Turn Error Definitions fold those records with Assistant and Turn/Step events: a failed step's streaming partial is removed and a durable retry notice appears at the retry event's sequence position. The notice is `scheduled` until the matching started record arrives; closing its owning Step or Turn first marks it `cancelled`, while the started record marks it `started`. Normal-mode notices carry their finite maximum; always-mode notices remain explicitly unbounded. A terminal `turn/end` error without a retry projects one `turn-error` node from its durable message and optional code; AUTH projections replace provider copy that may echo credential fragments with `API key is invalid`, while the raw diagnostic remains in the session log. A retried failure keeps only the retry notice for that attempt. Window rebuild and history replay use the same Definitions, so refresh neither resurrects discarded chunks nor loses terminal failure feedback. Visible unfinalized output is frozen as an interrupted Assistant node beside the terminal error.

+A `turn/end` whose reason is `max-tokens` projects one `turn-max-tokens` node at the turn position: a warning-styled localized notice that the reply stopped at the per-request output cap, with the truncated output kept in the flow and guidance that sending "continue" resumes in a new turn. The notice carries no token counts because the event reports none. The same Definition rebuilds it on window rebuild and history replay, so the reason survives refresh and restore.
+
 ## Session forking

 `ISessions.fork({sessionId, atSeq?, increaseTitle?})` resolves only after the child summary is locally addressable, carrying source lineage and cwd with `blank: false`; callers choose whether to open it. With `increaseTitle: true`, the client renames the child from the source session's persisted title: a trailing `(N)` or `（N）` is incremented without changing bracket style, while any other title gets ` (1)` appended; the rename is skipped when the source has no persisted title, and a rename failure rejects the promise but leaves the created child in place. This option is not sent in the Host fork request. A `workspace-attach-failed` response still identifies a child already published by the Host, so `SessionManager` reconciles that partial success before `SessionForkError` reaches the caller instead of making a retry create a duplicate child.
@@ -68,6 +68,8 @@ Trajectory Definition 组装出一条按时间顺序排列、以用途为判别

 Host 所属的 LLM（大语言模型）retry invariant 会在持久追加边界验证按提供方路由的 `llm/retry` 与 `llm/retry-started` 记录，包括标识、顺序、计时器、整数、状态、提供方延迟和非空诊断字段约定。客户端的 Retry、Assistant 与 Turn Error Definition 把这些记录和 Assistant、Turn／Step 事件一起折叠：失败步骤的流式输出片段会被移除，并在 retry 事件的序列位置插入一条持久重试提示。该提示在匹配的 started 记录到达前为 `scheduled`；如果所属 Step 或 Turn 先关闭，则标记为 `cancelled`，started 记录到达后则标记为 `started`。normal mode 提示携带其有限上限；always mode 提示保持显式无界。没有重试的终态 `turn/end` 错误会从持久消息与可选错误码投影出一个 `turn-error` 节点；AUTH 投影会把可能回显凭据片段的提供方文案替换为 `API key is invalid`，原始诊断仍保留在会话日志中。进入重试的失败只保留该次尝试的重试提示。窗口重建与历史回放使用同一组 Definition，因此刷新既不会让已丢弃的分片重新出现，也不会丢失终态失败反馈。可见但尚未定稿的输出会在终态错误旁冻结为中断的 Assistant 节点。

+reason 为 `max-tokens` 的 `turn/end` 会在该轮位置投影出一个 `turn-max-tokens` 节点：一条 warning 样式的本地化提示，说明回答在单次请求的输出 token 上限处停止，已截断的输出保留在对话流中，并提示发送“继续”可在新一轮接着输出。事件本身不携带 token 数量，提示因此不显示任何数字。窗口重建与历史回放使用同一 Definition 重建该节点，刷新和恢复后结束原因保持一致。
+
 ## 会话 fork

 `ISessions.fork({sessionId, atSeq?, increaseTitle?})` 只在子会话摘要已能在本地寻址后才完成；该摘要携带源会话的谱系和 cwd，且 `blank: false`，由调用方决定是否打开。`increaseTitle: true` 会在 client 端根据源会话的持久化标题重命名子会话：尾部 `(N)` 或 `（N）` 递增并保留括号样式，其余标题追加 ` (1)`；源会话没有持久化标题时跳过改名，改名失败时拒绝 promise 但保留已创建的子会话。该选项不会进入 Host fork 请求。即使响应为 `workspace-attach-failed`，其中仍会标识 Host 已发布的子会话，因此 `SessionManager` 会先将这一部分成功对账，再让 `SessionForkError` 到达调用方，避免重试创建重复的子会话。
@@ -77,7 +77,8 @@ export type {
  CommandNode, CompactionSummaryNode, ComposerPhase,
  ContextMessageNode, ConversationNode, ConversationSnapshot, ModelRetryNode, QueuedMessage,
  LegacyConversationSlice, PartialAssistant, RunningToolCall,
-  SteeringMessageNode, TodoItem, ToolCallBlock, ToolResultNode, TurnErrorNode, UnknownSurfaceNode, UserMessageNode,
+  SteeringMessageNode, TodoItem, ToolCallBlock, ToolResultNode, TurnErrorNode, TurnMaxTokensNode,
+  UnknownSurfaceNode, UserMessageNode,
 } from './sessions/conversation.ts'
 export {
  EMPTY_CHAT_SNAPSHOT, EMPTY_CONVERSATION_VIEWS, toAssistantBlock, toAssistantBlocks,
@@ -169,6 +169,17 @@ export interface TurnErrorNode {
  code?: string
 }

+/** Durable notice for a turn ended by the per-request output-token cap. */
+export interface TurnMaxTokensNode {
+  kind: 'turn-max-tokens'
+  /** Seq of the owning turn/end event. */
+  seq: number
+  /** Unix epoch ms from the turn/end event. */
+  time: number
+  turn: number
+  step: number
+}
+
 /** A tool result paired (when in-window) with its call head. */
 export interface ToolResultNode {
  kind: 'tool-result'
@@ -274,6 +285,7 @@ export type ConversationNode =
  | ContextMessageNode
  | ModelRetryNode
  | TurnErrorNode
+  | TurnMaxTokensNode
  | ToolResultNode
  | CommandNode
  | CompactionSummaryNode
@@ -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: 0429b980092acf9cbf808b1571c92ddea937e780
+README.md: 0281df76fe601eaad86cefc0dcaecc6d8999df60
+README.zh.md: 87c98cc92b80fe62a7522bf95a5612c388e07a1a
@@ -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，则以目录顺序和贡献项顺序打破平局。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`）是不含界面的外壳状态：`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: c5f3152006ea37848b21942d886cbfb74af15943
+README.md: b6a265c9f0a67d31ebeaa88bd59082c4be465983
+README.zh.md: 001e0a58badd6f31875c09a31085277928f1ae22
@@ -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；它无须修改会话 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会话作用域的 `'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会话作用域的 `'conversation.session.header.actions'` 列表，并在最右侧渲染独立的 `'conversation.session.header.utilities'` 列表。会话上下文和谱系控件保留在 `actions` 中；可选的会话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正文，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 => ({
@@ -244,6 +244,12 @@
  font: var(--dsw-font-markdown-code-block-small);
 }

+.maxTokensTitle {
+  margin-right: 6px;
+  color: var(--dsw-alias-state-warn-primary);
+  font-weight: 600;
+}
+
@keyframes retry-shimmer {
  from {
    background-position: 100% 50%;
@@ -130,6 +130,21 @@ function TurnErrorItem({ node, t }: {
  )
 }

+/** Persistent, turn-positioned notice for a turn ended at the output-token cap. */
+function TurnMaxTokensItem({ t }: {
+  t: ChatViewSlotProps['t']
+}) {
+  return (
+    <div className={css.turnErrorRow} role="status">
+      <StateDot state="warning" className={css.turnErrorDot} />
+      <div className={css.turnErrorCopy}>
+        <span className={css.maxTokensTitle}>{t('message.maxTokens')}</span>
+        <span className={css.turnErrorMessage}>{t('message.maxTokens.hint')}</span>
+      </div>
+    </div>
+  )
+}
+
 /**
 * Display projection of reference forms in a user bubble (free geometry — no
 * textarea alignment constraint here); everything else stays plain text. The
@@ -272,6 +287,11 @@ export const TurnErrorNodeView = memo(function TurnErrorNodeView({ node, t }: Ch
  return <TurnErrorItem node={node.data} t={t} />
 })

+/** Max-tokens turn-end notice keyed Chat renderer. */
+export const TurnMaxTokensNodeView = memo(function TurnMaxTokensNodeView({ t }: ChatNodeViewProps<'turn-max-tokens'>) {
+  return <TurnMaxTokensItem t={t} />
+})
+
 /** Explicit unknown-surface keyed Chat renderer. */
 export const UnknownNodeView = memo(function UnknownNodeView({ node, t }: ChatNodeViewProps<'unknown'>) {
  const data = node.data
@@ -4,7 +4,7 @@ import { AssistantNodeView } from './AssistantNodeView.tsx'
 import { CommandNodeView, ManualCompactionNodeView } from './CommandNodeView.tsx'
 import {
  CompactionNodeView, ContextMessageNodeView, RetryNodeView, TurnErrorNodeView,
-  UnknownNodeView, UserMessageNodeView,
+  TurnMaxTokensNodeView, UnknownNodeView, UserMessageNodeView,
 } from './MessageItem.tsx'
 import { TurnTailNodeView } from './TurnTailNodeView.tsx'

@@ -35,6 +35,8 @@ export function registerChatNodeRenderers(ctx: Context): void {
    { name: 'conversation.chat.node', key: 'model-retry', locale: NS }, RetryNodeView))
  ctx.slots.inject('conversation.chat.node', () => ctx.slots.register(
    { name: 'conversation.chat.node', key: 'turn-error', locale: NS }, TurnErrorNodeView))
+  ctx.slots.inject('conversation.chat.node', () => ctx.slots.register(
+    { name: 'conversation.chat.node', key: 'turn-max-tokens', locale: NS }, TurnMaxTokensNodeView))
  ctx.slots.inject('conversation.chat.node', () => ctx.slots.register({
    name: 'conversation.chat.node',
    key: 'turn-tail',
@@ -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'>
@@ -165,6 +165,7 @@ function legacyContribution(raw: ChatConversationViewNode): LegacyContribution {
    case 'command':
    case 'compaction':
    case 'turn-error':
+    case 'turn-max-tokens':
    case 'unknown':
      return { anchorSeq: node.anchorSeq, nodes: [node.data], partial: null, running: null }
    case 'assistant-step': {
@@ -7,11 +7,14 @@ import type {

 /**
 * Relative positions in one durable event's seq neighborhood: interrupted
- * Assistant, its follow-up Nodes, then follow-ups to an ordinary final.
+ * Assistant, its follow-up Nodes, then follow-ups to an ordinary final. The
+ * max-tokens notice sits between a closing Assistant and the turn-tail so the
+ * tail stays the turn's last node and keeps its branch action enabled.
 */
 export const CHAT_SYNTHETIC_SEQ_OFFSETS = {
  interruptedAssistant: -0.9,
  interruptedFollowup: -0.8,
+  maxTokensNotice: 0.05,
  finalizedFollowup: 0.1,
 } as const

@@ -9,6 +9,7 @@ import { registerMessageConversationNode } from './message.ts'
 import { registerRetryConversationNode } from './retry.ts'
 import { registerToolConversationNode } from './tool.ts'
 import { registerTurnErrorConversationNode } from './turn-error.ts'
+import { registerTurnMaxTokensConversationNode } from './turn-max-tokens.ts'
 import { registerTurnTailConversationNode } from './turn-tail.ts'

 /**
@@ -24,6 +25,7 @@ export function registerConversationNodes(ctx: Context): void {
  registerCompactionConversationNode(ctx)
  registerRetryConversationNode(ctx)
  registerTurnErrorConversationNode(ctx)
+  registerTurnMaxTokensConversationNode(ctx)
  registerTurnTailConversationNode(ctx)
  registerUnknownConversationFallback(ctx)
  registerChatConversationView(ctx)
@@ -0,0 +1,82 @@
+import type { Context } from '@deepseek-ai/cordis'
+import type {
+  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition, TurnMaxTokensNode,
+} from '@deepseek-ai/dsh-client-runtime/client'
+import { CHAT_SYNTHETIC_SEQ_OFFSETS, chatNode } from './common.ts'
+
+declare module '@deepseek-ai/dsh-client-ui-conversation/client' {
+  interface ChatNodeDataMap {
+    /** Turn ended by the per-request output-token cap. */
+    'turn-max-tokens': TurnMaxTokensNode
+  }
+}
+
+interface TurnMaxTokensState {
+  readonly turn: number
+  readonly seq: number
+  readonly time: number
+}
+
+function lastStep(context: ConversationNodeContext<TurnMaxTokensState>): number {
+  const location = context.start?.location ?? context.matches[0]?.location
+  if (location?.kind !== 'turn' && location?.kind !== 'step') return 0
+  return location.turn.steps.at(-1)?.step ?? 0
+}
+
+/**
+ * Anchor the notice between the closing Assistant and the turn-tail so the
+ * tail stays the turn's last Chat node and keeps its branch action enabled.
+ * Without a closing text Assistant there is no branch action to protect, and
+ * the turn/end seq keeps the notice at the truncation point.
+ */
+function noticeAnchor(context: ConversationNodeContext<TurnMaxTokensState>, seq: number): number {
+  const location = context.start?.location ?? context.matches[0]?.location
+  if (location?.kind !== 'turn' && location?.kind !== 'step') return seq
+  const closing = location.turn.data.get('turn-tail')?.closing
+  return closing === null || closing === undefined
+    ? seq
+    : closing.finalNode.seq + CHAT_SYNTHETIC_SEQ_OFFSETS.maxTokensNotice
+}
+
+function stateFrom(match: ConversationMatch): TurnMaxTokensState | undefined {
+  if (match.event.type !== 'turn/end' || match.event.data.reason.kind !== 'max-tokens') return undefined
+  return { turn: match.event.data.turn, seq: match.event.seq, time: match.event.time }
+}
+
+/** Notice Definition for a turn the provider ended at its output-token cap. */
+export const turnMaxTokensDefinition: ConversationNodeDefinition<TurnMaxTokensState> = {
+  kind: 'turn-max-tokens',
+  target: 'chat',
+  match: (event) => {
+    if (event.type === 'turn/end' && event.data.reason.kind === 'max-tokens') {
+      return { id: String(event.data.turn), role: 'start' }
+    }
+    return null
+  },
+  start: (_context, match) => {
+    const state = stateFrom(match)
+    if (state === undefined) throw new Error('turn-max-tokens start requires a max-tokens turn/end')
+    return state
+  },
+  update: context => context.state,
+  buildViewNode: (context) => {
+    const state = context.state
+    if (state === undefined) return null
+    const node: TurnMaxTokensNode = {
+      kind: 'turn-max-tokens',
+      seq: state.seq,
+      time: state.time,
+      turn: state.turn,
+      step: lastStep(context),
+    }
+    return chatNode(context, 'turn-max-tokens', noticeAnchor(context, state.seq), node)
+  },
+}
+
+/**
+ * Register the max-tokens turn-end notice contribution.
+ * @param ctx - owning UI Conversation context.
+ */
+export function registerTurnMaxTokensConversationNode(ctx: Context): void {
+  ctx.conversationEvents.register(turnMaxTokensDefinition)
+}
@@ -11,6 +11,7 @@ export type {} from './conversation-nodes/message.ts'
 export type {} from './conversation-nodes/retry.ts'
 export type {} from './conversation-nodes/tool.ts'
 export type {} from './conversation-nodes/turn-error.ts'
+export type {} from './conversation-nodes/turn-max-tokens.ts'
 export type {} from './conversation-nodes/turn-tail.ts'

 export { apply, inject } from './apply.ts'
@@ -122,6 +122,8 @@ export const zh = {
  'message.retry.delay': '重试延迟：',
  'message.retry.failure': '失败原因：',
  'message.turnError': '本轮运行失败',
+  'message.maxTokens': '已达到输出 token 上限',
+  'message.maxTokens.hint': '回答被截断，已有输出保留在对话中。发送“继续”可让模型接着输出。',
  'message.ranFor': '用时 {duration}',
  'message.ttft': '首 token {seconds}秒',
  'message.tokensPerSecond': '{tps} tok/s',
@@ -289,6 +291,8 @@ export const en = {
  'message.retry.delay': 'Retry delay: ',
  'message.retry.failure': 'Failure reason: ',
  'message.turnError': 'This turn failed',
+  'message.maxTokens': 'Output token limit reached',
+  'message.maxTokens.hint': 'The reply was cut off; earlier output is preserved in the conversation. Send "continue" to let the model resume.',
  'message.ranFor': 'Ran for {duration}',
  'message.ttft': 'TTFT {seconds}s',
  'message.tokensPerSecond': '{tps} tok/s',
@@ -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 && (
@@ -9,7 +9,7 @@ import { useEffect } from 'react'
 import type {
  AssistantMessageNode, CommandNode, CompactionSummaryNode, ConversationNode, ConversationSnapshot,
  ModelRetryNode, RunningToolCall, SessionId, SessionListState, ToolCallBlock, ToolResultNode, TurnErrorNode,
-  UserMessageNode, WorkspaceListState,
+  TurnMaxTokensNode, UserMessageNode, WorkspaceListState,
 } from '@deepseek-ai/dsh-client-runtime/client'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
 import {
@@ -28,7 +28,7 @@ import { AssistantNodeView } from '../src/client/chat/AssistantNodeView.tsx'
 import { CommandNodeView, ManualCompactionNodeView } from '../src/client/chat/CommandNodeView.tsx'
 import {
  CompactionNodeView, ContextMessageNodeView, RetryNodeView, TurnErrorNodeView,
-  UnknownNodeView, UserMessageNodeView,
+  TurnMaxTokensNodeView, UnknownNodeView, UserMessageNodeView,
 } from '../src/client/chat/MessageItem.tsx'
 import { TurnTailNodeView } from '../src/client/chat/TurnTailNodeView.tsx'
 import { formatRunDuration } from '../src/client/chat/message-chrome.ts'
@@ -108,6 +108,9 @@ const turnError = (seq: number, code?: string): TurnErrorNode => ({
  message: seq === 2 ? 'API key is invalid' : 'plugin exploded',
  ...(code === undefined ? {} : { code }),
 })
+const turnMaxTokens = (seq: number): TurnMaxTokensNode => ({
+  kind: 'turn-max-tokens', seq, time: seq * 1_000, turn: 1, step: 0,
+})
 const toolResult = (seq: number, callId: string, name = 'bash'): ToolResultNode => ({
  kind: 'tool-result', seq, time: seq * 1_000, callId,
  call: { name, argsRaw: `{"command":"cmd-${callId}","description":"run ${callId}"}` },
@@ -217,6 +220,8 @@ function makeHarness(init?: Partial<ConversationSnapshot>) {
        return <RetryNodeView {...nodeProps<'model-retry'>()} />
      case 'turn-error':
        return <TurnErrorNodeView {...nodeProps<'turn-error'>()} />
+      case 'turn-max-tokens':
+        return <TurnMaxTokensNodeView {...nodeProps<'turn-max-tokens'>()} />
      case 'turn-tail':
        return (
          <TurnTailNodeView
@@ -585,6 +590,16 @@ describe('ChatView', () => {
    ])
  })

+  it('renders the max-tokens notice with localized guidance, distinct from turn errors', () => {
+    const h = makeHarness({ nodes: [user(1, 'try'), assistant(2, 'truncated'), turnMaxTokens(3)] })
+    const view = render(<h.ChatView {...h.props} />)
+    const statuses = view.getAllByRole('status')
+    expect(statuses.map(status => status.textContent)).toEqual([
+      '已达到输出 token 上限回答被截断，已有输出保留在对话中。发送“继续”可让模型接着输出。',
+    ])
+    expect(view.queryByText('本轮运行失败')).toBeNull()
+  })
+
  it('hands the trajectory callback to the Tool seat', () => {
    const h = makeHarness({
      nodes: [toolResult(3, 'a')],
@@ -14,6 +14,7 @@ import { messageDefinition } from '../src/client/conversation-nodes/message.ts'
 import { retryDefinition } from '../src/client/conversation-nodes/retry.ts'
 import { toolDefinition } from '../src/client/conversation-nodes/tool.ts'
 import { turnErrorDefinition } from '../src/client/conversation-nodes/turn-error.ts'
+import { turnMaxTokensDefinition } from '../src/client/conversation-nodes/turn-max-tokens.ts'
 import { turnTailDefinition } from '../src/client/conversation-nodes/turn-tail.ts'
 import type {
  AssistantChatData, ManualCompactionChatData, RetryChatData, ToolChatData, TurnTailChatData,
@@ -29,6 +30,7 @@ const DEFINITIONS: readonly ConversationNodeDefinition[] = [
  compactionDefinition,
  retryDefinition,
  turnErrorDefinition,
+  turnMaxTokensDefinition,
  turnTailDefinition,
 ]

@@ -812,6 +814,75 @@ describe('built-in conversation node Definitions', () => {
    expect(node(snapshot(value), 'turn-error')).toBeUndefined()
  })

+  it('materializes a max-tokens notice and keeps completed and error turns clean', () => {
+    const value = assembler([
+      at(1, 'turn/start', { turn: 1 }),
+      at(2, 'step/start', { turn: 1, step: 1 }),
+      at(3, 'assistant/message', {
+        turn: 1, step: 1, message: assistantMessage('a1', 'truncated answer'),
+      }, { surfaceOp: 'append' }),
+      at(4, 'step/end', { turn: 1, step: 1 }),
+      at(5, 'turn/end', { turn: 1, reason: { kind: 'max-tokens' } }),
+    ])
+    const notice = node(snapshot(value), 'turn-max-tokens')
+    expect(notice?.data).toMatchObject({ kind: 'turn-max-tokens', seq: 5, turn: 1, step: 1 })
+    expect(node(snapshot(value), 'turn-error')).toBeUndefined()
+    // The tail stays the turn's last node so its branch action survives; the
+    // notice slots between the truncated closing Assistant and the tail.
+    const tail = node(snapshot(value), 'turn-tail')
+    expect(notice?.anchorSeq).toBeLessThan(tail?.anchorSeq ?? Number.NEGATIVE_INFINITY)
+    expect(notice?.anchorSeq).toBeGreaterThan(3)
+
+    const completed = assembler([
+      at(1, 'turn/start', { turn: 1 }),
+      at(2, 'turn/end', { turn: 1, reason: { kind: 'completed' } }),
+    ])
+    expect(node(snapshot(completed), 'turn-max-tokens')).toBeUndefined()
+
+    const failed = assembler([
+      at(1, 'turn/start', { turn: 1 }),
+      at(2, 'turn/end', {
+        turn: 1,
+        reason: { kind: 'error', error: { code: 'TRANSPORT', message: 'failed' } },
+      }),
+    ])
+    expect(node(snapshot(failed), 'turn-max-tokens')).toBeUndefined()
+    expect(node(snapshot(failed), 'turn-error')).toBeDefined()
+  })
+
+  it('keeps the max-tokens notice when the window starts after the owning turn/start', () => {
+    const value = assembler([
+      at(9, 'turn/end', { turn: 3, reason: { kind: 'max-tokens' } }),
+    ], true)
+    const notice = node(snapshot(value), 'turn-max-tokens')
+    expect(notice?.data).toMatchObject({ kind: 'turn-max-tokens', seq: 9, turn: 3 })
+  })
+
+  it('pins the max-tokens Definition edges the engine cannot reach', () => {
+    // The engine only hands start the single matched turn/end and never emits
+    // update Matches for this kind; these direct calls pin the declared
+    // behavior of both required Definition members anyway.
+    const match = (seq: number, type: string, data: unknown) => ({
+      event: { seq, time: seq * 1_000, type, data },
+      view: undefined,
+      role: 'start',
+      location: undefined,
+    }) as unknown as Parameters<typeof turnMaxTokensDefinition.start>[1]
+    const context = (state: unknown, matches: unknown[] = []) => ({
+      key: 'k', kind: 'turn-max-tokens', id: '1', matches, start: undefined, state, current: new Map(),
+    }) as unknown as Parameters<NonNullable<typeof turnMaxTokensDefinition.buildViewNode>>[0]
+    const reader = { previous: () => undefined }
+
+    expect(() => turnMaxTokensDefinition.start(context(undefined), match(1, 'turn/start', { turn: 1 }), reader))
+      .toThrow('turn-max-tokens start requires a max-tokens turn/end')
+    const state = { turn: 1, seq: 5, time: 5_000 }
+    expect(turnMaxTokensDefinition.update(
+      context(state) as Parameters<typeof turnMaxTokensDefinition.update>[0],
+      match(6, 'turn/end', { turn: 1, reason: { kind: 'completed' } }),
+    )).toBe(state)
+    expect(turnMaxTokensDefinition.buildViewNode?.(context(undefined))).toBeNull()
+  })
+
  it('preserves nested Tools and manual compaction evidence when their start events are outside the window', () => {
    const value = assembler([
      at(12, 'tool/code-dispatch-start', {
@@ -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-trajectory/README.md
-README.md: f4b3bd223c2872f0341d49bdaa102440d73b4f29
-README.zh.md: 76f6052d12a8fbd67871a1600191dbcb36a350c5
+README.md: d3786b6460c5df7eaa6d24e68c80025e7fb29ae4
+README.zh.md: b3bc88d8ab73ccc0da9a49d1867fe2c66be5ca43
@@ -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的加载尚未完成时，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的加载尚未完成时，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))}
      />,