feat(tui): add transcript compaction progress marker

packages/ui/tui/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/ui/tui/README.md
-README.md: ec21bfa7dc18acead439fd409e60a29391d4daf3
-README.zh.md: b4b49fc3dad77b740800351c87bfdfcdc545d208
+README.md: 712a7420c802a86a326d9dbcb8921a85fa226c04
+README.zh.md: 138f97facc7c3fc8f99d9e02c353e51e0dbc81b5

packages/ui/tui/README.md

@@ -22,7 +22,7 @@ Typing `@` at a token boundary searches files and directories under the session
 
 When optional `ctx.sessionReferences` is mounted, the same `@` menu also offers metadata-only session candidates, inserts `@[label](dsh-session:<payload>)`, and prepares the selected snapshots before dispatch. Session references remain structured because the model has no filesystem-like tool for retrieving session snapshots later. Preparation disables duplicate submission and restores the editor input on failure. The TUI chooses `agent.steer()` or `agent.followup()` from the status after that asynchronous preparation, so idle follow-ups still dispatch `agent/prompt-submit` while in-turn steering joins at a checkpoint without that hook.
 
-While the agent is running, ordinary editor submissions call `agent.steer()`; otherwise they call `agent.followup()`. A slash at the start of the submitted line enters `ctx.commands` instead: known commands execute directly, unknown commands produce a warning, and neither path automatically reaches the model. A command producer may explicitly schedule agent work; [`dsh-plan-mode`](../../plan/plan-mode/README.md#model-and-human-surfaces) uses that contract for `/plan [message]`. The TUI registers `/help`, `/model`, `/clear`, `/palette`, `/reload`, `/resume`, `/status`, and `/exit` as agent-scoped definitions; every other effective command joins autocomplete and `/help` dynamically, as do `/skill:` completions. A status line above the editor reports the turn phase the TUI derives from session events — waiting for the first token, thinking, responding, or executing tools — with the elapsed time in that phase and the running step total, refreshed each second, and ends with the `Enter sends steering, Esc cancels` hint; while steering messages wait to reach the model it inserts a `N queued ·` badge before the hint that clears as each drains. During a live standalone compaction bracket, the idle prompt caret becomes a one-cell throbbing `⊙` and terminal progress stays active until close; a failed close adds `Compaction failed: <error>`, while a resumed orphaned start never activates the indicator ([decision](../../../.agents/notes/implemented/feature/2026-07-30-compaction-progress-visibility.md)). Ctrl+C or Escape cancels a running turn. Tool and injected-context cards collapse long bodies into a configurable head/tail preview; Ctrl+O cycles tool cards through collapsed preview, full output, and hidden — the hidden phase drops tool cards from the transcript entirely while context cards stay at their preview, since injected instructions are not tool traffic. An injected-context card renders its message as prose with the producer's outer reminder frame stripped, so neither the fold nor the frame stripping depends on the payload's syntax. Ctrl+R toggles reasoning, Ctrl+L redraws, and Ctrl+D exits while idle.
+While the agent is running, ordinary editor submissions call `agent.steer()`; otherwise they call `agent.followup()`. A slash at the start of the submitted line enters `ctx.commands` instead: known commands execute directly, unknown commands produce a warning, and neither path automatically reaches the model. A command producer may explicitly schedule agent work; [`dsh-plan-mode`](../../plan/plan-mode/README.md#model-and-human-surfaces) uses that contract for `/plan [message]`. The TUI registers `/help`, `/model`, `/clear`, `/palette`, `/reload`, `/resume`, `/status`, and `/exit` as agent-scoped definitions; every other effective command joins autocomplete and `/help` dynamically, as do `/skill:` completions. A status line above the editor reports the turn phase the TUI derives from session events — waiting for the first token, thinking, responding, or executing tools — with the elapsed time in that phase and the running step total, refreshed each second, and ends with the `Enter sends steering, Esc cancels` hint; while steering messages wait to reach the model it inserts a `N queued ·` badge before the hint that clears as each drains. During a live standalone compaction bracket, a terminal-only `◐` / `◓` / `◑` / `◒ Compaction in progress…` row stays at the transcript tail, the idle prompt caret becomes a one-cell throbbing `⊙`, and terminal progress stays active until close. The live row survives transcript clears and rebuilds but is never logged or replayed; a failed close replaces it with `Compaction failed: <error>`, while a resumed orphaned start never activates either indicator ([decision](../../../.agents/notes/implemented/feature/2026-07-30-compaction-progress-visibility.md)). Ctrl+C or Escape cancels a running turn. Tool and injected-context cards collapse long bodies into a configurable head/tail preview; Ctrl+O cycles tool cards through collapsed preview, full output, and hidden — the hidden phase drops tool cards from the transcript entirely while context cards stay at their preview, since injected instructions are not tool traffic. An injected-context card renders its message as prose with the producer's outer reminder frame stripped, so neither the fold nor the frame stripping depends on the payload's syntax. Ctrl+R toggles reasoning, Ctrl+L redraws, and Ctrl+D exits while idle.
 
 `/model` opens the advisory `ctx.llm` catalog as a keyboard selector: a filter box above the list narrows rows by a case-insensitive substring over each row's `provider/model` label, model name, and description, keeping the highlighted row selected when it survives the filter; Up/Down moves, Shift+Tab cycles the focused model's adapter-advertised reasoning efforts in display order, Enter selects the model and effort, and Escape clears a non-empty filter before a second Escape closes it. When an adapter does not advertise a default effort, the cycle also includes `Default`, which clears an explicit selection and preserves the provider default; models without selectable effort metadata ignore Shift+Tab. The selector renders the exact advertised effort list—including `off` when present—and does not synthesize, clamp, or transfer an effort between models. `/model <model>` still selects an unambiguous model id directly, while `/model <provider>/<model>` selects an exact target and uses its adapter default when one exists. The configured target or latest logged request header initializes the selector, and an unlisted current model remains visible because catalogs are advisory. Selection is local to this TUI session. Prompt assembly snapshots the target for one step, replaces `{{provider}}` and `{{model}}`, and applies the same provider/model/reasoning-effort target through `agent/request`; a switch during assembly therefore starts with a later step. The request header durably records targets that reach the model, while an unused selection remains process-local.
 

packages/ui/tui/README.zh.md

@@ -22,7 +22,7 @@ TUI 从追加来源的会话事件重建已恢复历史，渲染 Markdown 响应
 
 挂载可选的 `ctx.sessionReferences` 后，同一个 `@` 菜单还会提供仅含元数据的会话候选项，插入 `@[label](dsh-session:<payload>)`，并在分派前准备所选快照。会话引用保持结构化，因为模型没有类似文件系统的工具可在稍后检索会话快照。准备期间会禁止重复提交，并在失败时恢复编辑器输入。TUI 会在异步准备后根据状态选择 `agent.steer()` 或 `agent.followup()`，因此空闲 followup 仍会分派 `agent/prompt-submit`，而轮次中的 steering 会在检查点加入且不触发该 hook。
 
-Agent 运行时，普通编辑器提交会调用 `agent.steer()`；其他时候调用 `agent.followup()`。提交行以斜杠开头时会改为进入 `ctx.commands`：已知命令直接执行，未知命令产生警告，两条路径都不会自动到达模型。命令生产方可以显式调度 agent 工作；[`dsh-plan-mode`](../../plan/plan-mode/README.md#model-and-human-surfaces) 使用该契约实现 `/plan [message]`。TUI 将 `/help`、`/model`、`/clear`、`/palette`、`/reload`、`/resume`、`/status` 和 `/exit` 注册为 agent 作用域定义；其他所有有效命令都会动态加入自动补全与 `/help`，`/skill:` 补全也相同。编辑器上方的状态行会报告 TUI 从会话事件派生的轮次阶段，包括等待首个 token、思考、响应或执行工具；它显示该阶段已经过时间和运行中的步骤总数，每秒刷新，并以 `Enter sends steering, Esc cancels` 提示结尾。Steering 消息等待到达模型期间，会在提示前插入 `N queued ·` 徽标，每条消息排空后随即清除。在实时独立压缩（compaction）标记对处于开启状态期间，空闲提示符光标会变成占一个终端字符单元并呈呼吸律动的 `⊙`，终端进度状态会保持活跃，直至标记对闭合；闭合失败时会追加 `Compaction failed: <error>`，而恢复会话时遇到的陈旧未匹配 start 绝不会激活该指示器（[决策](../../../.agents/notes/implemented/feature/2026-07-30-compaction-progress-visibility.md)）。Ctrl+C 或 Escape 会取消运行中的轮次。工具卡片与注入上下文卡片都把长主体折叠为可配置的头尾预览；Ctrl+O 让工具卡片在折叠预览、完整输出、隐藏三种状态间循环——隐藏阶段把工具卡片从 transcript 中完全去掉，而上下文卡片保持预览，因为注入的指令不属于工具流量。注入上下文卡片把消息渲染为文本，并去掉生产方的外层提醒外框，因此折叠与去外框都不依赖载荷的语法。Ctrl+R 切换 reasoning，Ctrl+L 重绘，Ctrl+D 在空闲时退出。
+Agent 运行时，普通编辑器提交会调用 `agent.steer()`；其他时候调用 `agent.followup()`。提交行以斜杠开头时会改为进入 `ctx.commands`：已知命令直接执行，未知命令产生警告，两条路径都不会自动到达模型。命令生产方可以显式调度 agent 工作；[`dsh-plan-mode`](../../plan/plan-mode/README.md#model-and-human-surfaces) 使用该契约实现 `/plan [message]`。TUI 将 `/help`、`/model`、`/clear`、`/palette`、`/reload`、`/resume`、`/status` 和 `/exit` 注册为 agent 作用域定义；其他所有有效命令都会动态加入自动补全与 `/help`，`/skill:` 补全也相同。编辑器上方的状态行会报告 TUI 从会话事件派生的轮次阶段，包括等待首个 token、思考、响应或执行工具；它显示该阶段已经过时间和运行中的步骤总数，每秒刷新，并以 `Enter sends steering, Esc cancels` 提示结尾。Steering 消息等待到达模型期间，会在提示前插入 `N queued ·` 徽标，每条消息排空后随即清除。在实时独立压缩（compaction）标记对处于开启状态期间，一行仅存在于终端的 `◐` / `◓` / `◑` / `◒ Compaction in progress…` 状态会固定在 transcript 尾部，空闲提示符光标会变成占一个终端字符单元并呈呼吸律动的 `⊙`，终端进度状态则会保持活跃，直至标记对闭合。该实时行会在 transcript 清空或重建后继续存在，但绝不会记录或回放；闭合失败时它会被 `Compaction failed: <error>` 取代，而恢复会话时遇到的陈旧未匹配 start 绝不会激活这两个指示器（[决策](../../../.agents/notes/implemented/feature/2026-07-30-compaction-progress-visibility.md)）。Ctrl+C 或 Escape 会取消运行中的轮次。工具卡片与注入上下文卡片都把长主体折叠为可配置的头尾预览；Ctrl+O 让工具卡片在折叠预览、完整输出、隐藏三种状态间循环——隐藏阶段把工具卡片从 transcript 中完全去掉，而上下文卡片保持预览，因为注入的指令不属于工具流量。注入上下文卡片把消息渲染为文本，并去掉生产方的外层提醒外框，因此折叠与去外框都不依赖载荷的语法。Ctrl+R 切换 reasoning，Ctrl+L 重绘，Ctrl+D 在空闲时退出。
 
 `/model` 将建议性的 `ctx.llm` catalog 打开为键盘选择器：列表上方设有一个过滤框，按对每行 `provider/model` 标签、模型名称和描述的大小写不敏感子串匹配来缩小行集，并在高亮行仍通过过滤时保持其选中状态；Up/Down 移动，Shift+Tab 按显示顺序循环切换适配器为焦点模型公布的推理强度，Enter 选择模型和推理强度，Escape 会先清除非空过滤内容，再次按下才关闭选择器。适配器未公布默认推理强度时，循环还会包含 `Default`，该项会清除显式选择并保留提供方默认行为；没有可选推理强度元数据的模型会忽略 Shift+Tab。选择器会原样呈现公布的推理强度列表（包括存在时的 `off`），不会合成、自动调整或在模型之间转移推理强度。`/model <model>` 仍可直接选择无歧义的模型 id，`/model <provider>/<model>` 则选择精确目标，并在存在时使用其适配器默认值。已配置目标或最新记录的请求 header 会初始化选择器；由于 catalog 仅提供建议，未列出的当前模型仍会显示。选择仅对本 TUI 会话有效。提示词组装会为一个步骤建立目标快照，替换 `{{provider}}` 和 `{{model}}`，并通过 `agent/request` 应用同一个提供方／模型／推理强度目标；因此组装期间的切换会从后续步骤开始生效。请求 header 会持久记录真正到达模型的目标，未使用的选择则只存在于进程本地。
 

packages/ui/tui/src/components/transcript.ts

@@ -32,10 +32,14 @@ import { contentText, type ParsedArguments } from './content.ts'
 import {
   formatCompletionTime,
   formatTimingTotals,
+  STATUS_ANIMATION_INTERVAL_MS,
   stepTimingAt,
   type StepPosition,
 } from '../chat/timing.ts'
 
+const COMPACTION_PROGRESS_FRAMES = ['◐', '◓', '◑', '◒'] as const
+const COMPACTION_PROGRESS_LABEL = 'Compaction in progress…'
+
 /** Concatenate the text of every block of one type, separated by blank lines. */
 function textBlocks(content: readonly ContentBlock[], type: 'text' | 'reasoning'): string {
   return content
@@ -120,6 +124,29 @@ export class HeaderComponent implements Component {
   }
 }
 
+/**
+ * Process-local transcript tail announcing a live standalone compaction.
+ * The leading blank belongs to the component so removing it leaves no gap.
+ */
+export class CompactionProgressComponent implements Component {
+  constructor(
+    private readonly startedAt: number,
+    private readonly now: () => number,
+    private readonly palette: Palette,
+  ) {}
+
+  invalidate(): void {}
+
+  render(width: number): string[] {
+    const elapsed = Math.max(0, this.now() - this.startedAt)
+    const frameIndex = Math.floor(elapsed / STATUS_ANIMATION_INTERVAL_MS)
+      % COMPACTION_PROGRESS_FRAMES.length
+    const frame = COMPACTION_PROGRESS_FRAMES[frameIndex] as string
+    const marker = `${this.palette.accent(frame)} ${this.palette.dim(COMPACTION_PROGRESS_LABEL)}`
+    return ['', truncateToWidth(marker, Math.max(1, width), '')]
+  }
+}
+
 /**
  * A user or steering prompt in the transcript. An underlined accent role header
  * plus blank-line spacing separate it from surrounding blocks; body lines carry

packages/ui/tui/src/index.ts

@@ -94,6 +94,7 @@ import {
   type Config,
 } from './config.ts'
 import {
+  CompactionProgressComponent,
   ContextCardComponent,
   type ToolCardVisibility,
   HeaderComponent,
@@ -347,7 +348,11 @@ export function createTuiChat(
    * Live standalone compaction observed by this process. Never derive this
    * state from history: a resumed log may contain a stale orphaned start.
    */
-  let compacting: { startedAt: number; timer: ReturnType<typeof setInterval> } | undefined
+  let compacting: {
+    startedAt: number
+    timer: ReturnType<typeof setInterval>
+    progress: CompactionProgressComponent
+  } | undefined
   // TUI steering submissions that the inbox has not yet claimed or discarded.
   // Correlation ids avoid guessing whether a running-state submission actually
   // joined steering or fell back to the queued-turn FIFO during turn close.
@@ -478,6 +483,11 @@ export function createTuiChat(
 
   const requestRender = (): void => {
     if (disposed) return
+    if (compacting !== undefined) {
+      compacting.progress.invalidate()
+      chat.removeChild(compacting.progress)
+      chat.addChild(compacting.progress)
+    }
     updatePromptValues()
     const inputPrompt = renderInputPrompt()
     editor.setPrompt({ first: inputPrompt, continuation: ' '.repeat(visibleWidth(inputPrompt)) })
@@ -567,6 +577,7 @@ export function createTuiChat(
   const clearStatus = (): void => {
     if (compacting !== undefined) {
       clearInterval(compacting.timer)
+      chat.removeChild(compacting.progress)
       compacting = undefined
     }
     clearTurnStatus()
@@ -1525,9 +1536,11 @@ export function createTuiChat(
     // a stale resumed orphan for current work.
     if (event.type === 'compact/start' && event.data.turn === null) {
       if (compacting === undefined) {
+        const startedAt = now()
         compacting = {
-          startedAt: now(),
+          startedAt,
           timer: setInterval(renderStatus, STATUS_ANIMATION_INTERVAL_MS),
+          progress: new CompactionProgressComponent(startedAt, now, palette),
         }
         runtime.terminal.setProgress(true)
       }
@@ -1536,6 +1549,7 @@ export function createTuiChat(
     }
     if (event.type === 'compact/end' && event.data.turn === null && compacting !== undefined) {
       clearInterval(compacting.timer)
+      chat.removeChild(compacting.progress)
       compacting = undefined
       if (event.data.error !== undefined) {
         appendNotice(`Compaction failed: ${event.data.error}`, 'warning')

packages/ui/tui/tests/tui.spec.ts

@@ -1992,12 +1992,15 @@ describe('pi-tui chat lifecycle and transcript', () => {
     await dispose(result)
   })
 
-  it('shows one compaction glyph cell for a live standalone bracket while idle', async () => {
+  it('shows a dynamic transcript marker and one glyph cell for a live standalone bracket while idle', async () => {
     let clock = 0
     const result = await setup({ omitInitialLifecycle: true, now: () => clock })
     const idleWidth = promptWidth(result.terminal.output)
 
     result.session.append('compact/start', { turn: null })
+    await tick()
+    expect(result.terminal.output).toContain('◐ Compaction in progress…')
+
     clock = 1_000
     result.terminal.output = ''
     await new Promise(resolve => setTimeout(resolve, 75))
@@ -2005,6 +2008,12 @@ describe('pi-tui chat lifecycle and transcript', () => {
     expect(result.terminal.output).toContain('dsh ⊙ ')
     expect(promptWidth(result.terminal.output)).toBe(idleWidth)
     expect(result.terminal.progress.at(-1)).toBe(true)
+
+    clock = 1_050
+    result.terminal.output = ''
+    await new Promise(resolve => setTimeout(resolve, 75))
+    expect(result.terminal.output).toContain('◓')
+
     await dispose(result)
   })
 
@@ -2015,6 +2024,7 @@ describe('pi-tui chat lifecycle and transcript', () => {
 
     expect(result.terminal.output).toContain('dsh > ')
     expect(result.terminal.output).not.toContain('dsh ⊙ ')
+    expect(result.terminal.output).not.toContain('Compaction in progress…')
     expect(result.terminal.progress.at(-1)).toBe(false)
     await dispose(result)
   })
@@ -2029,12 +2039,14 @@ describe('pi-tui chat lifecycle and transcript', () => {
     await tick()
 
     clock = 2_000
-    result.terminal.output = ''
     await new Promise(resolve => setTimeout(resolve, 120))
+    result.terminal.output = ''
+    result.terminal.resize(result.terminal.columns + 1)
     await tick()
 
     expect(result.terminal.output).toContain('dsh > ')
     expect(result.terminal.output).not.toMatch(/dsh [◍✻●⚙⊙]/u)
+    expect(result.terminal.output).not.toContain('Compaction in progress…')
     expect(result.terminal.progress.at(-1)).toBe(false)
     await dispose(result)
   })
@@ -2047,6 +2059,7 @@ describe('pi-tui chat lifecycle and transcript', () => {
     await tick()
 
     expect(result.terminal.output).toContain('Compaction failed: summary failed')
+    expect(result.terminal.output).not.toContain('Compaction in progress…')
     expect(result.terminal.progress.at(-1)).toBe(false)
     await dispose(result)
   })
@@ -2058,9 +2071,11 @@ describe('pi-tui chat lifecycle and transcript', () => {
     clock = 1_000
     result.terminal.output = ''
     result.ctx.emit('agent/status', result.agent, 'idle')
+    result.terminal.resize(result.terminal.columns + 1)
     await tick()
 
     expect(result.terminal.output).toContain('dsh ⊙ ')
+    expect(result.terminal.output).toContain('Compaction in progress…')
     expect(result.terminal.progress.at(-1)).toBe(true)
     await dispose(result)
   })
@@ -2075,6 +2090,7 @@ describe('pi-tui chat lifecycle and transcript', () => {
 
     expect(result.terminal.output).toContain('dsh ◍ ')
     expect(result.terminal.output).not.toContain('dsh ⊙ ')
+    expect(result.terminal.output).toContain('Compaction in progress…')
     result.session.append('compact/end', { turn: null })
     await tick()
     result.terminal.output = ''
@@ -2099,12 +2115,12 @@ describe('pi-tui chat lifecycle and transcript', () => {
       clearIntervalSpy.mockClear()
       result.session.append('compact/start', { turn: null })
       clock = 1_000
-      result.terminal.output = ''
       result.session.append('compact/start', { turn: null })
       await tick()
 
       expect(intervalSpy).toHaveBeenCalledOnce()
       expect(result.terminal.output).toContain('dsh ⊙ ')
+      expect(result.terminal.output).toContain('Compaction in progress…')
       expect(result.terminal.progress.at(-1)).toBe(true)
 
       result.session.append('compact/end', { turn: null })
@@ -2132,10 +2148,33 @@ describe('pi-tui chat lifecycle and transcript', () => {
 
     expect(result.terminal.output).toContain('dsh > ')
     expect(result.terminal.output).not.toContain('dsh ⊙ ')
+    expect(result.terminal.output).not.toContain('Compaction in progress…')
     expect(result.terminal.progress.at(-1)).toBe(false)
     await dispose(result)
   })
 
+  it('keeps the live compaction marker at the transcript tail across new content and clear', async () => {
+    const result = await setup({ omitInitialLifecycle: true, now: () => 1_000 })
+    result.session.append('compact/start', { turn: null })
+    result.terminal.output = ''
+    appendUser(result.session, 'arrived during compaction')
+    await tick()
+
+    expect(result.terminal.output).toContain('arrived during compaction')
+    expect(result.terminal.output).toContain('Compaction in progress…')
+
+    result.terminal.output = ''
+    result.terminal.send('/clear')
+    result.terminal.send('\r')
+    await tick()
+    result.terminal.resize(result.terminal.columns + 1)
+    await tick()
+
+    expect(result.terminal.output).toContain('Compaction in progress…')
+    result.session.append('compact/end', { turn: null })
+    await dispose(result)
+  })
+
   it('releases the live compaction timer and progress bit on dispose', async () => {
     const intervalSpy = vi.spyOn(globalThis, 'setInterval')
     const clearIntervalSpy = vi.spyOn(globalThis, 'clearInterval')