chore(release): cut 0.14.0-beta.2

docs(changelog): fold 0.14.0-beta.2 UI fixes into the 0.14.0 entry
Show a lone tool call as itself and group from the second call (#8109 )
2026-10-28 20:22:45 +00:00 · 2026-10-28 18:16:49 +01:00 · 2026-10-28 17:46:16 +01:00 · 2026-10-28 17:42:03 +01:00 · 2026-10-28 17:42:03 +01:00 · 2026-10-28 17:42:03 +01:00
115 changed files with 2680 additions and 1107 deletions
@@ -133,11 +133,12 @@ jobs:
        if: ${{ !cancelled() && steps.install.outcome == 'success' && (needs.changes.outputs.full != 'false' || needs.changes.outputs.sdk != 'false') }}
        run: npm run typecheck:examples --workspace=@getpaseo/client

+  # The locked Playwright installers do not support ubuntu-latest's Ubuntu 26.04.
  typecheck:
    name: typecheck
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.quality != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4

@@ -395,7 +396,7 @@ jobs:
    name: app-tests
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.app != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4

@@ -417,19 +418,11 @@ jobs:
      - name: Run app unit tests
        run: npm run test --workspace=@getpaseo/app

-      - uses: actions/setup-java@v4
-        with:
-          distribution: temurin
-          java-version: "21"
-
-      - name: Run Android module tests
-        run: npm run test:android --workspace=@getpaseo/app
-
  playwright-1:
    name: playwright (shard 1/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "1/8"
      PLAYWRIGHT_ARTIFACT: "1"
@@ -485,7 +478,7 @@ jobs:
    name: playwright (shard 2/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "2/8"
      PLAYWRIGHT_ARTIFACT: "2"
@@ -495,7 +488,7 @@ jobs:
    name: playwright (shard 3/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "3/8"
      PLAYWRIGHT_ARTIFACT: "3"
@@ -505,7 +498,7 @@ jobs:
    name: playwright (shard 4/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "4/8"
      PLAYWRIGHT_ARTIFACT: "4"
@@ -515,7 +508,7 @@ jobs:
    name: playwright (shard 5/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "5/8"
      PLAYWRIGHT_ARTIFACT: "5"
@@ -525,7 +518,7 @@ jobs:
    name: playwright (shard 6/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "6/8"
      PLAYWRIGHT_ARTIFACT: "6"
@@ -535,7 +528,7 @@ jobs:
    name: playwright (shard 7/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "7/8"
      PLAYWRIGHT_ARTIFACT: "7"
@@ -545,7 +538,7 @@ jobs:
    name: playwright (shard 8/8)
    needs: changes
    if: ${{ !cancelled() && (needs.changes.outputs.full != 'false' || needs.changes.outputs.browser != 'false') }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
    env:
      PLAYWRIGHT_SHARD: "8/8"
      PLAYWRIGHT_ARTIFACT: "8"
@@ -1,6 +1,6 @@
 # Changelog

-## 0.14.0-beta.1 - 2026-10-27
+## 0.14.0-beta.2 - 2026-10-28

 Plugins can now add tools to individual agents and configure their MCP servers when sessions open.

@@ -11,7 +11,7 @@ Voice settings now let you configure speech providers and download local models
 ### Added

 - Let plugins give tools to specific agents ([#7938](https://github.com/getpaseo/paseo/pull/7938))
- Added collapse and expand controls for completed conversation turns ([#7785](https://github.com/getpaseo/paseo/pull/7785), [#7990](https://github.com/getpaseo/paseo/pull/7990), [#8026](https://github.com/getpaseo/paseo/pull/8026) by [@akaready](https://github.com/akaready), [@Dey11](https://github.com/Dey11), [@Sebeb](https://github.com/Sebeb), [@Waishnav](https://github.com/Waishnav))
+- Added Chat display settings that group tool calls or collapse completed conversation turns ([#7785](https://github.com/getpaseo/paseo/pull/7785), [#7990](https://github.com/getpaseo/paseo/pull/7990), [#8026](https://github.com/getpaseo/paseo/pull/8026), [#8042](https://github.com/getpaseo/paseo/pull/8042), [#8109](https://github.com/getpaseo/paseo/pull/8109) by [@akaready](https://github.com/akaready), [@Dey11](https://github.com/Dey11), [@Sebeb](https://github.com/Sebeb), [@Waishnav](https://github.com/Waishnav))
 - Let plugins add MCP servers whenever an agent session opens ([#7983](https://github.com/getpaseo/paseo/pull/7983))
 - Added downloadable local speech models in Voice settings, including SenseVoice and Whisper for Chinese dictation ([#7295](https://github.com/getpaseo/paseo/pull/7295))
 - Added a choice of Enter or ⌘/Ctrl+Enter to send messages ([#5503](https://github.com/getpaseo/paseo/pull/5503) by [@lukelabonte](https://github.com/lukelabonte))
@@ -23,6 +23,7 @@ Voice settings now let you configure speech providers and download local models

 - Release eligible agent runtimes after one idle hour, resuming the saved session on the next prompt ([#7782](https://github.com/getpaseo/paseo/pull/7782))
 - Added a link back to the parent in subagent panes ([#7784](https://github.com/getpaseo/paseo/pull/7784))
+- Opened subagents in place of the subagent list on phones, with Back returning to the list ([#8093](https://github.com/getpaseo/paseo/pull/8093))
 - Added clickable links and selectable descriptions to question cards ([#7419](https://github.com/getpaseo/paseo/pull/7419) by [@NoSync](https://github.com/NoSync))
 - Kept large Import session lists responsive on web ([#7872](https://github.com/getpaseo/paseo/pull/7872) by [@royenheart](https://github.com/royenheart))
 - Enlarged project and workspace menu buttons on phones ([#7928](https://github.com/getpaseo/paseo/pull/7928))
@@ -48,10 +49,12 @@ Voice settings now let you configure speech providers and download local models
 - Fixed outside-folder links replacing Files with an access error ([#7726](https://github.com/getpaseo/paseo/pull/7726) by [@jtomaszewski](https://github.com/jtomaszewski))
 - Fixed command suggestions overlapping a growing Composer on phones ([#7910](https://github.com/getpaseo/paseo/pull/7910))
 - Fixed bare Markdown URLs losing ports or stopping at colons in paths ([#7859](https://github.com/getpaseo/paseo/pull/7859) by [@mariotaku](https://github.com/mariotaku))
- Fixed inline code sizing inside emphasis, links and headings ([#7889](https://github.com/getpaseo/paseo/pull/7889))
+- Fixed inline code sizing inside emphasis, links and headings ([#7889](https://github.com/getpaseo/paseo/pull/7889), [#8088](https://github.com/getpaseo/paseo/pull/8088))
+- Fixed compact navigation sizes and a cramped Settings detail pane in docked windows 600–719 wide ([#8052](https://github.com/getpaseo/paseo/pull/8052) by [@zeyugao](https://github.com/zeyugao))
 - Fixed Settings losing the selected host or sidebar scroll position between sections ([#7893](https://github.com/getpaseo/paseo/pull/7893), [#7899](https://github.com/getpaseo/paseo/pull/7899) by [@bingqilinweimaotai](https://github.com/bingqilinweimaotai), [@wangnan0916](https://github.com/wangnan0916))
 - Fixed OpenCode v2 subagent rows missing model and token details ([#7799](https://github.com/getpaseo/paseo/pull/7799) by [@Davnn1](https://github.com/Davnn1))
 - Fixed file-link tooltips staying over the preview after leaving a chat ([#7842](https://github.com/getpaseo/paseo/pull/7842))
+- Fixed model discovery errors touching the model picker edges ([#8039](https://github.com/getpaseo/paseo/pull/8039) by [@ilteoood](https://github.com/ilteoood))
 - Fixed model selectors staying open over Settings ([#7783](https://github.com/getpaseo/paseo/pull/7783) by [@ragokan](https://github.com/ragokan))

 ### Notes
@@ -1,6 +1,6 @@
 # 更新日志

-## 0.14.0-beta.1 - 2026-10-27
+## 0.14.0-beta.2 - 2026-10-28

 插件现在可以为单个 Agent 添加工具，并在会话打开时配置其 MCP 服务器。

@@ -11,7 +11,7 @@
 ### 新增

 - 插件现在可以为特定 Agent 提供工具 ([#7938](https://github.com/getpaseo/paseo/pull/7938))
- 新增已完成对话轮次的折叠和展开功能 ([#7785](https://github.com/getpaseo/paseo/pull/7785), [#7990](https://github.com/getpaseo/paseo/pull/7990), [#8026](https://github.com/getpaseo/paseo/pull/8026) by [@akaready](https://github.com/akaready), [@Dey11](https://github.com/Dey11), [@Sebeb](https://github.com/Sebeb), [@Waishnav](https://github.com/Waishnav))
+- 新增“聊天显示”设置，可将工具调用分组或折叠已完成的对话轮次 ([#7785](https://github.com/getpaseo/paseo/pull/7785), [#7990](https://github.com/getpaseo/paseo/pull/7990), [#8026](https://github.com/getpaseo/paseo/pull/8026), [#8042](https://github.com/getpaseo/paseo/pull/8042), [#8109](https://github.com/getpaseo/paseo/pull/8109) by [@akaready](https://github.com/akaready), [@Dey11](https://github.com/Dey11), [@Sebeb](https://github.com/Sebeb), [@Waishnav](https://github.com/Waishnav))
 - 插件现在可以在每次打开 Agent 会话时添加 MCP 服务器 ([#7983](https://github.com/getpaseo/paseo/pull/7983))
 - 语音设置新增可下载的本地语音模型，支持使用 SenseVoice 和 Whisper 进行中文听写 ([#7295](https://github.com/getpaseo/paseo/pull/7295))
 - 新增 Enter 或 ⌘/Ctrl+Enter 发送消息的快捷键选项 ([#5503](https://github.com/getpaseo/paseo/pull/5503) by [@lukelabonte](https://github.com/lukelabonte))
@@ -23,6 +23,7 @@

 - 符合条件的 Agent 运行时空闲一小时后释放，下次发送提示词时恢复已保存的会话 ([#7782](https://github.com/getpaseo/paseo/pull/7782))
 - 在子 Agent 窗格中新增返回父 Agent 的链接 ([#7784](https://github.com/getpaseo/paseo/pull/7784))
+- 在手机上从子 Agent 列表打开子 Agent 时直接替换列表，点按“返回”可回到列表 ([#8093](https://github.com/getpaseo/paseo/pull/8093))
 - 问题卡片新增可点击链接和可选中的描述文本 ([#7419](https://github.com/getpaseo/paseo/pull/7419) by [@NoSync](https://github.com/NoSync))
 - 减少网页端长会话导入列表的操作卡顿 ([#7872](https://github.com/getpaseo/paseo/pull/7872) by [@royenheart](https://github.com/royenheart))
 - 增大手机上项目和工作区菜单按钮的点击区域 ([#7928](https://github.com/getpaseo/paseo/pull/7928))
@@ -48,10 +49,12 @@
 - 修复工作区外的文件夹链接使 Files 显示访问错误的问题 ([#7726](https://github.com/getpaseo/paseo/pull/7726) by [@jtomaszewski](https://github.com/jtomaszewski))
 - 修复手机上命令建议与不断增高的 Composer 重叠的问题 ([#7910](https://github.com/getpaseo/paseo/pull/7910))
 - 修复 Markdown 裸链接丢失端口或在路径冒号处截断的问题 ([#7859](https://github.com/getpaseo/paseo/pull/7859) by [@mariotaku](https://github.com/mariotaku))
- 修复强调、链接和标题中行内代码的字号问题 ([#7889](https://github.com/getpaseo/paseo/pull/7889))
+- 修复强调、链接和标题中行内代码的字号问题 ([#7889](https://github.com/getpaseo/paseo/pull/7889), [#8088](https://github.com/getpaseo/paseo/pull/8088))
+- 修复宽度 600–719 的停靠布局使用紧凑导航尺寸、设置详情面板过窄的问题 ([#8052](https://github.com/getpaseo/paseo/pull/8052) by [@zeyugao](https://github.com/zeyugao))
 - 修复切换设置页面时丢失已选主机或侧栏滚动位置的问题 ([#7893](https://github.com/getpaseo/paseo/pull/7893), [#7899](https://github.com/getpaseo/paseo/pull/7899) by [@bingqilinweimaotai](https://github.com/bingqilinweimaotai), [@wangnan0916](https://github.com/wangnan0916))
 - 修复 OpenCode v2 子 Agent 行缺少模型和 token 详情的问题 ([#7799](https://github.com/getpaseo/paseo/pull/7799) by [@Davnn1](https://github.com/Davnn1))
 - 修复离开聊天后文件链接提示仍遮挡预览的问题 ([#7842](https://github.com/getpaseo/paseo/pull/7842))
+- 修复模型发现错误信息紧贴模型选择器边缘的问题 ([#8039](https://github.com/getpaseo/paseo/pull/8039) by [@ilteoood](https://github.com/ilteoood))
 - 修复模型选择器在打开设置后仍然显示的问题 ([#7783](https://github.com/getpaseo/paseo/pull/7783) by [@ragokan](https://github.com/ragokan))

 ### 说明
@@ -288,7 +288,7 @@ parentAgentId === thisAgent.id  AND  !archivedAt

 - **Provider subagents** are child executions owned by Claude, Codex, or OpenCode. They are not inserted into `AgentManager` as managed agents. Providers emit a separate descriptor and timeline stream through `agent.provider_subagents.*`; the client keeps that state outside the normal agent store and merges only the presentation rows into the track. A descriptor's optional `parentSubagentId` identifies its direct provider-subagent parent; an absent value identifies a direct child of the managed agent.

-Clicking either kind opens a workspace tab. On compact layouts it opens in a [sheet](explorer-sidebar.md#sheets) over the subagents list instead; the sheet hides the composer and shows the agent's model and thinking as one line in its place (`PaneSubtitle`, the row provider subagents already use), and a Paseo subagent's sheet offers **Open as tab** (the full-screen glyph in the header) to get the composer back. A Paseo subagent tab is a normal interactive agent pane. A provider subagent tab is a read-only timeline pane with no composer, archive, detach, rewind, or fork actions. It shows its own direct children in a subagents track. Every subagent pane links back to its parent (`packages/app/src/subagents/parent/`): a pill above the composer when there is one, a parent box in the composer's place when there is not. Both panes use `AgentStreamView`, so message, reasoning, tool-call, and layout rendering stay identical.
+Clicking either kind opens a workspace tab. On compact layouts it opens in a [sheet](explorer-sidebar.md#sheets) instead, replacing the subagents list in place (Back returns to the list); the sheet hides the composer and shows the agent's model and thinking as one line in its place (`PaneSubtitle`, the row provider subagents already use), and a Paseo subagent's sheet offers **Open as tab** (the full-screen glyph in the header) to get the composer back. A Paseo subagent tab is a normal interactive agent pane. A provider subagent tab is a read-only timeline pane with no composer, archive, detach, rewind, or fork actions. It shows its own direct children in a subagents track. Every subagent pane links back to its parent (`packages/app/src/subagents/parent/`): a pill above the composer when there is one, a parent box in the composer's place when there is not. Both panes use `AgentStreamView`, so message, reasoning, tool-call, and layout rendering stay identical.

 Provider timelines use the same structural timeline item format but deliberately have a separate lifecycle and transport. A provider thread/session identifier is not a Paseo agent identifier, and closing its tab is always layout-only.

@@ -98,7 +98,7 @@ The older `android`, `android:development`, and `ios` commands remain aliases fo
 `android:production` still builds and installs a release through Expo; use `build:apk` when you
 need an artifact. `android:clear` removes the generated Android project.

-Run `npm run test:android --workspace=@getpaseo/app` to prebuild Android and run native module unit tests. The app CI job runs this command with the Android toolchain.
+Run `npm run test:android --workspace=@getpaseo/app` explicitly with a local Android toolchain to prebuild Android and run native module unit tests. Ordinary CI does not prebuild Android or run these tests.

 ### Diagnostic logs without ADB

@@ -150,18 +150,20 @@ One row off the rail makes the whole card look unconsidered.

 Compact-first. The small case is designed; the large case adds chrome around it.

-The list+detail pattern is canonical and reused across surfaces. The settings shell (`packages/app/src/screens/settings-screen.tsx`) and the projects screen (`packages/app/src/screens/projects-screen.tsx`) implement it identically:
+Use `md: 600` for both the compact/wide layout boundary and responsive density, in logical points on native and CSS pixels on web. Do not add a separate density breakpoint. Measured content constraints remain independent: composer controls use `COMPACT_CONTENT_WIDTH` (500), so a narrow pane can keep compact controls inside a wide window.
+
+The settings shell (`packages/app/src/screens/settings-screen.tsx`) and the projects screen (`packages/app/src/screens/projects-screen.tsx`) share the canonical list+detail navigation pattern:

 - On compact: full-screen list with `<BackHeader>` at the top. Tapping a row pushes a full-screen detail with its own `<BackHeader>` that returns to the list.
- On desktop: a 320px sidebar on the left holds the list with `surfaceSidebar` background. The content pane on the right holds the selected detail with `<ScreenHeader>`, `<HeaderIconBadge>`, and `<ScreenTitle>`.
+- On wide layouts: a sidebar on the left holds the list with `surfaceSidebar` background. The content pane on the right holds the selected detail with `<ScreenHeader>`, `<HeaderIconBadge>`, and `<ScreenTitle>`.

 The branching is one `useIsCompactFormFactor()` check at the top of the screen component. The list and the detail are the same components in both layouts; only the framing changes.

 The workspace screen (`packages/app/src/screens/workspace/workspace-screen.tsx`) follows a different but parallel rule: tabs collapse on compact, panes split on desktop. The sidebar (`packages/app/src/components/left-sidebar.tsx`) is overlaid on compact and pinned on desktop.

-On a narrow desktop route, app navigation yields to the rendered content topology when the remaining width cannot preserve its center target: Settings keeps its 320px list + 400px detail split, and a workspace Explorer keeps its current visible width plus a 400px center pane. That is a topology decision at the app container, not a second compact breakpoint. Temporary width clamps are render-only; widening restores the user's saved sidebar widths.
+On a narrow window using the wide layout, app navigation yields when the remaining width cannot accommodate the content topology. Settings prefers a 720px split (320px list + 400px detail); its list shrinks first to keep forms readable without reducing the detail below 400px. Explorer reserves at least 240px plus a 360px workspace. These are local space budgets, not compact breakpoints. The app sidebar shrinks from its preferred 320px toward a 200px minimum to leave a 400px center target; its preferred width fits at 720px. Temporary width clamps are render-only; widening restores the user's saved sidebar widths.

-Electron window controls are top-corner obstructions, not a compact-layout condition. Rendered surfaces declare which top corners they physically occupy; only those corners receive clearance. Full-window overlays redeclare both corners. A focused split pane owns both corners; if focus restoration temporarily exposes the full split tree, the split boundary reserves one top strip instead of assigning a control rectangle to an arbitrarily narrow leaf. The 720px desktop breakpoint preserves the default 320px sidebar and target 400px center width when the Explorer is closed; it is product policy, not an obstruction gate.
+Electron window controls are top-corner obstructions, not a compact-layout condition. Rendered surfaces declare which top corners they physically occupy; only those corners receive clearance. Full-window overlays redeclare both corners. A focused split pane owns both corners; if focus restoration temporarily exposes the full split tree, the split boundary reserves one top strip instead of assigning a control rectangle to an arbitrarily narrow leaf.

 Windows and Linux controls are fixed window chrome, outside scrolling header content. A tab rail that reaches them ends at their obstruction and shows the shared overflow fade. On macOS, the Explorer toggle occupies a fixed top-right window slot so opening and closing Explorer does not move the pointer target.

@@ -33,25 +33,36 @@ keeps only agents and terminals. A panel kind opts in with `compactSheet` in its
 (`packages/app/src/panels/panel-manifest.ts`), and the layout store's `openTab` decides between
 sheet and tab, so callers open targets the same way on every layout. Each such sheet holds one
 ordinary `WorkspaceTab` (`SheetTab` in the store) and is an `IsolatedBottomSheetModal` like every
-other sheet in the app, so it sits on the one app-wide stack: a sheet opened from any sheet, a
-subagent chosen from the subagents list included, lands on top of it, and closing the top sheet
-(drag, Close, backdrop, or Android Back) uncovers the one below. The list stays open under the
-sheet it opened; see [menus.md](menus.md#selecting-an-item-on-ios) for the row contract.
+other sheet in the app, so it sits on the one app-wide stack: a sheet opened from any sheet lands on
+top of it, and closing the top sheet (drag, Close, backdrop, or Android Back) uncovers the one below.
+
+A subagent chosen from the subagents list is the exception. It opens as a page of the list's own
+sheet and replaces the list in place: Back returns to the list, Close ends both, and Open parent
+closes the list, landing on the pane the list was opened from. The store's `selectSheetTab` describes
+the `SheetTab` a reveal would show without opening it, so the page never enters `sheetsByWorkspace`.
+See [menus.md](menus.md#a-page-that-fills-the-sheet) for the page contract.

 The store keeps `sheetsByWorkspace` in opening order and never reorders it, because moving a sheet
 remounts its panel. Revealing a target that already has a sheet uncovers that sheet by closing the
 ones above it, except ones holding unsaved work, which stay where they are. Opening a sheet as a tab
 dismisses the sheets above it, since the tab would sit under them. The stack is not persisted.

-Sheets are modal and cover both compact sidebars as well as the workspace. A sheet's header is its drag
-handle, because the panel scrolls on its own and content panning would fight it. Its trailing rail
-holds icon buttons only (`SheetHeaderIconButton`): Open as tab is the full-screen glyph beside
-Close, so the title keeps its width. Compact sheets use the app overlay host: a workspace-local
-host sits behind the app-level left sidebar. The workspace environment bridge preserves existing
-editing sessions, caches, file-link resolution and supported navigation context without moving
-their providers. Keep this capability at the workspace boundary; new sheet callers must not
-assemble provider internals. Wide layouts retain local hosting and pane geometry. Both hosts
-forward the same Gorhom modal queue; neither creates another stack. See
+Both kinds render the same `SheetPane` (`packages/app/src/screens/workspace/sheet-pane/`): the
+header (icon, title, Back when there is a list to return to, Open as tab, Close), the pane, its
+bottom inset, and its focus. Only the container differs, a workspace sheet in `sheet-tabs.tsx` or a
+menu page in `sheet-pane/page.tsx`, so a fix to what a sheet shows lands in one place. The
+container owns Android Back; the pane never subscribes to it.
+
+Sheets are modal and cover both compact sidebars as well as the workspace. The header drags the
+sheet through `SheetDragArea`, because the panel scrolls on its own and content panning would fight
+it. Its trailing rail holds icon buttons only (`SheetHeaderIconButton`): Open as tab is the
+full-screen glyph beside Close, so the title keeps its width. Compact sheets use the app overlay
+host: a workspace-local host sits behind the app-level left sidebar. The sheet pane bridge
+(`useSheetPaneBridge`) preserves existing editing sessions, caches, file-link resolution and
+supported navigation context without moving their providers. Keep this capability at the workspace
+boundary; new sheet callers must not assemble provider internals. Wide layouts retain local hosting
+and pane geometry. Both hosts forward the same Gorhom modal queue; neither creates another stack.
+See
 [floating-panels.md Gotcha 7](floating-panels.md#gotcha-7--a-sheet-cannot-read-context-from-its-call-site).

 A sheet holding unsaved work is never implicitly displaced; only its guarded close removes it.
@@ -410,6 +410,19 @@ bridges the menu's two contexts; the rest pass `null`.

 Wrapping providers _around_ the modal does nothing. They land on the wrong side.

+## Gotcha 8 — Read safe-area insets where the overlay draws
+
+A compact sheet tab's body (`SheetBottomInset` in `adaptive-modal-sheet.tsx`) pads the bottom
+inset and gives its content a bottom inset of 0, so the composer dock sits the same in a sheet as
+in a tab. An overlay opened from that content and calling `useSafeAreaInsets()` at its call site
+gets that 0 and draws over the navigation bar.
+
+- A Gorhom sheet reads the inset inside its children, which render in the app's sheet host. See
+  `CompactSheetBody`, `MenuSheetScrollView` and `ComboboxSheetFrame`.
+- An RN `Modal` passes the call site's context straight through, so put a `SafeAreaProvider`
+  inside it and read the inset below that. The modal is its own window, and the provider measures
+  it. See `attachment-lightbox.tsx`.
+
 ## Recipe for a new anchored panel

 Before you write a new one, ask:
@@ -22,7 +22,7 @@ Authoritative terminology. UI label wins. Don't invent synonyms; use what's here
 - **Sidebar items** — The configurable entries of the app sidebar, in two sections. Header: the rows at the head of the sidebar — New workspace, History, Search, Schedules, and plugin header items. Footer: the full-width rows between Add project and the footer icon row — Usage and plugin footer items. Add project and the icon row (Hosts, Help and support, Settings) are fixed and are not sidebar items. A plugin item may render several rows, such as one per bot; it is still one item that moves and hides as a block. Each section's order and visibility is one per-device preference (`AppSettings.sidebarNavItems`, `AppSettings.sidebarFooterItems`); every item may be off. UI: the Header and Footer cards on the Sidebar settings page. Code: `packages/app/src/sidebar-nav/model.ts` resolves a section, and the sidebar (`components/sidebar/sidebar-nav-rows.tsx`, the footer in `components/left-sidebar.tsx`) and the settings page (`screens/settings/sidebar/sidebar-nav-section.tsx`) read it through `useSidebarNavItems(section)`. Never hardcode one of these entries or add a second place that decides which ones show. Don't confuse with **Explorer sidebar**.
 - **Explorer sidebar** — The dedicated navigation dock containing the Files and Changes trees. UI: "Explorer sidebar". Code: `packages/app/src/workspace-tabs/explorer-sidebar.ts`; persisted pane identifiers retain the `explorer` spelling. See [explorer-sidebar.md](explorer-sidebar.md).
 - **Sheet** — Any bottom sheet; there is one kind and one app-wide stack, so a sheet opened from a sheet lands on top of it and closing it uncovers the one below. Code: `IsolatedBottomSheetModal` (`packages/app/src/components/ui/isolated-bottom-sheet-modal`). Forbidden: "Workspace sheet", "modal sheet" as a distinct kind. See [floating-panels.md](floating-panels.md).
- **Sheet tab** — A compact-layout sheet holding one file or subagent tab over the workspace without adding it to the tab switcher. UI action: "Open as tab". Code: `SheetTab` and `sheetsByWorkspace` in `packages/app/src/stores/workspace-layout-store.ts`, `SheetTabs` (`packages/app/src/screens/workspace/sheet-tabs.tsx`). See [explorer-sidebar.md](explorer-sidebar.md#sheets).
+- **Sheet tab** — A compact-layout sheet holding one file or subagent tab over the workspace without adding it to the tab switcher. A subagent chosen from the subagents list shows as a page of the list's sheet instead of a sheet of its own. UI action: "Open as tab". Code: `SheetTab` and `sheetsByWorkspace` in `packages/app/src/stores/workspace-layout-store.ts`, `SheetPane` (`packages/app/src/screens/workspace/sheet-pane/`). See [explorer-sidebar.md](explorer-sidebar.md#sheets).
 - **Side pane** — An ordinary right-side workspace pane used for content opened beside the user's work. It closes and participates in workspace splits like every other main-host pane. See [explorer-sidebar.md](explorer-sidebar.md#side-pane). Forbidden: "Side panel".
 - **Directory-backed surface** — A right-sidebar surface whose content is determined by the workspace's `cwd`, so two workspaces on the same directory see identical content: git diff/status, forge change-request info, file preview/explorer contents. Keyed by `(serverId, cwd)`, never `workspaceId`. See [architecture.md](architecture.md#right-sidebar-boundary-directory-backed-vs-workspace-owned).
 - **Workspace-owned state** — Per-workspace state that never leaks to a same-`cwd` sibling: tabs, agents, terminals, panes, title, plus review drafts, diff-mode overrides, composer attachments, and file-explorer open/expand state. Keyed by `workspaceId` (`cwd` only as a fallback for old payloads). See [architecture.md](architecture.md#right-sidebar-boundary-directory-backed-vs-workspace-owned).
@@ -52,10 +52,12 @@ is another, with its own icons and hover-revealed actions — but both hand the
 and take `closeOnSelect` to say whether choosing them ends the surface. A row that owns its press
 outright leaves the surface open behind whatever it opened, and skips the iOS wait.

-A row whose result opens a sheet passes `closeOnSelect={false}`: the sheet stacks over the menu
-sheet and uncovers it on close, so the menu is where the user lands next. A row that opens a tab
+A row whose result opens a sheet opens it as a page of the menu's own sheet, never as a second
+sheet over it: the row names a [fill page](#a-page-that-fills-the-sheet) with `opensPage`, the page
+replaces the list in place, Back returns to the list, and Close ends both. A row that opens a tab
 closes, because the tab replaces the pane the menu belongs to. The subagents track asks the layout
-store which one a row is (`useSubagentOpensInSheet`), since the answer changes with the layout.
+store which sheet tab a row would show (`useSubagentSheetTab`), since the answer changes with the
+layout; a row with none opens its tab.

 ## Pages

@@ -101,6 +103,23 @@ The sheet keeps `keyboardBehavior="interactive"`. `extend` grows a sheet to its
 point, and with `enableDynamicSizing` that point is the content's own height — a short page does
 not grow, and the keyboard comes up over the field you are typing into.

+## A page that fills the sheet
+
+A page can carry its own content instead of rows: `{ id, fill: true, content }`. Only the sheet
+renders one. It takes the full-sheet snap point (`FULL_SHEET_SNAP_POINTS`) instead of sizing to
+content, and the sheet stops panning on content drags, because the page scrolls on its own and a
+drag would fight that scroll. The page's header drags the sheet instead, through `SheetDragArea`.
+
+The content renders on the far side of the sheet's portal, so it brings its own context bridge,
+built where the page is defined. Sheet tabs are the one user: `useSheetPanePage` turns a `SheetTab`
+into a fill page around the same `SheetPane` the workspace's own sheets render. See
+[explorer-sidebar.md](explorer-sidebar.md#sheets).
+
+Back pops one page. The header's Back and Android Back both call `goBack`, which answers `false` at
+the root so the sheet closes instead. A page whose definition disappears while it is open, such as
+a subagent archived from elsewhere, is pruned from the path, and the sheet falls back to the page
+that opened it.
+
 ## Hover intent

 A flyout **overlaps its parent by 5pt** rather than sitting beside it. With a gap there is a strip
@@ -189,7 +208,7 @@ its own.
  entering animation never ends at the off-screen measuring position; on a slow machine that
  write moved the open menu back off-screen.
 - **Sheets size to content.** `enableDynamicSizing`, not fixed snap points. A pushed page is
-  rarely the height of the page before it.
+  rarely the height of the page before it. A fill page is the one exception.
 - **The sheet's content is teleported out of the menu's subtree**, so `MenuSheetSurface` rebuilds
  both menu contexts through the sheet's `contextBridge`. Providing them around the modal puts
  them on the wrong side of the portal and every item inside throws. Gotcha 7 in
@@ -1,12 +1,12 @@
 {
  "name": "paseo",
-  "version": "0.14.0-beta.1",
+  "version": "0.14.0-beta.2",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "paseo",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "hasInstallScript": true,
      "license": "Apache-2.0",
      "workspaces": [
@@ -37590,7 +37590,7 @@
    },
    "packages/app": {
      "name": "@getpaseo/app",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@codemirror/commands": "6.10.4",
        "@codemirror/language": "6.12.4",
@@ -39793,12 +39793,12 @@
    },
    "packages/cli": {
      "name": "@getpaseo/cli",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@clack/prompts": "^1.0.0",
-        "@getpaseo/client": "0.14.0-beta.1",
-        "@getpaseo/protocol": "0.14.0-beta.1",
-        "@getpaseo/server": "0.14.0-beta.1",
+        "@getpaseo/client": "0.14.0-beta.2",
+        "@getpaseo/protocol": "0.14.0-beta.2",
+        "@getpaseo/server": "0.14.0-beta.2",
        "chalk": "^5.3.0",
        "commander": "^12.0.0",
        "mime-types": "^2.1.35",
@@ -40045,10 +40045,10 @@
    },
    "packages/client": {
      "name": "@getpaseo/client",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
-        "@getpaseo/protocol": "0.14.0-beta.1",
-        "@getpaseo/relay": "0.14.0-beta.1",
+        "@getpaseo/protocol": "0.14.0-beta.2",
+        "@getpaseo/relay": "0.14.0-beta.2",
        "ws": "^8.20.0",
        "zod": "^4.4.3"
      },
@@ -40060,7 +40060,7 @@
    },
    "packages/desktop": {
      "name": "@getpaseo/desktop",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "license": "Apache-2.0",
      "dependencies": {
        "@getpaseo/cli": "*",
@@ -40304,7 +40304,7 @@
    },
    "packages/expo-two-way-audio": {
      "name": "@getpaseo/expo-two-way-audio",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "license": "MIT",
      "devDependencies": {
        "@types/jest": "^29.5.14",
@@ -40350,7 +40350,7 @@
    },
    "packages/highlight": {
      "name": "@getpaseo/highlight",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@codemirror/language": "6.12.4",
        "@codemirror/legacy-modes": "^6.5.3",
@@ -40379,15 +40379,15 @@
    },
    "packages/plugin": {
      "name": "@getpaseo/plugin",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@agentclientprotocol/sdk": "^1.4.0",
        "i18next": "^26.3.0",
        "use-sync-external-store": "^1.6.0"
      },
      "devDependencies": {
-        "@getpaseo/client": "0.14.0-beta.1",
-        "@getpaseo/protocol": "0.14.0-beta.1",
+        "@getpaseo/client": "0.14.0-beta.2",
+        "@getpaseo/protocol": "0.14.0-beta.2",
        "@types/node": "^20.9.0",
        "@types/react": "~19.2.0",
        "react": "19.2.3",
@@ -40397,8 +40397,8 @@
        "zod": "^4.4.3"
      },
      "peerDependencies": {
-        "@getpaseo/client": "0.14.0-beta.1",
-        "@getpaseo/protocol": "0.14.0-beta.1",
+        "@getpaseo/client": "0.14.0-beta.2",
+        "@getpaseo/protocol": "0.14.0-beta.2",
        "react": ">=19.1.0 <20",
        "react-native": ">=0.81.5",
        "zod": "^4.4.3"
@@ -40420,7 +40420,7 @@
    },
    "packages/protocol": {
      "name": "@getpaseo/protocol",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "semver": "^7.8.5",
        "zod": "^4.4.3"
@@ -40447,7 +40447,7 @@
    },
    "packages/relay": {
      "name": "@getpaseo/relay",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@noble/ciphers": "^2.4.0",
        "@noble/curves": "^2.4.0",
@@ -40668,16 +40668,16 @@
    },
    "packages/server": {
      "name": "@getpaseo/server",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@agentclientprotocol/sdk": "^0.17.1",
        "@anthropic-ai/claude-agent-sdk": "0.3.246",
        "@anthropic-ai/sdk": "^0.104.2",
-        "@getpaseo/client": "0.14.0-beta.1",
-        "@getpaseo/highlight": "0.14.0-beta.1",
-        "@getpaseo/plugin": "0.14.0-beta.1",
-        "@getpaseo/protocol": "0.14.0-beta.1",
-        "@getpaseo/relay": "0.14.0-beta.1",
+        "@getpaseo/client": "0.14.0-beta.2",
+        "@getpaseo/highlight": "0.14.0-beta.2",
+        "@getpaseo/plugin": "0.14.0-beta.2",
+        "@getpaseo/protocol": "0.14.0-beta.2",
+        "@getpaseo/relay": "0.14.0-beta.2",
        "@isaacs/ttlcache": "^2.1.4",
        "@modelcontextprotocol/sdk": "1.29.0",
        "@opencode-ai/sdk": "1.14.46",
@@ -41598,7 +41598,7 @@
    },
    "packages/website": {
      "name": "@getpaseo/website",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@cloudflare/vite-plugin": "^1.29.1",
        "@cloudflare/workers-types": "^4.20260317.1",
@@ -43208,7 +43208,7 @@
    },
    "plugins": {
      "name": "@getpaseo/builtin-plugins",
-      "version": "0.14.0-beta.1",
+      "version": "0.14.0-beta.2",
      "dependencies": {
        "@getpaseo/plugin": "*",
        "zod": "^4.4.3"
@@ -1,6 +1,6 @@
 {
  "name": "paseo",
-  "version": "0.14.0-beta.1",
+  "version": "0.14.0-beta.2",
  "private": true,
  "description": "Paseo: voice-controlled development environment for local AI coding agents",
  "keywords": [
@@ -5,12 +5,16 @@ import { expectComposerVisible } from "../support/helpers/composer";
 import { installDaemonWebSocketGate } from "../support/helpers/daemon-websocket-gate";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
 import {
+  expectSubagentRowGone,
  expectSubagentRowVisible,
  openSubagentFromCompactTrack,
  seedSubagent,
 } from "../support/helpers/subagents";
 import {
+  backToList,
  closeSheet,
+  expectNoSheetOpen,
+  expectOneSheetOpen,
  expectOpenTabCount,
  openSheetAsTab,
  expectDeclinedDiscardPrompt,
@@ -52,6 +56,10 @@ test("compact opens files and subagents in a sheet, leaving the tabs for agents"
      { client: workspace.client, repoPath: workspace.cwd, workspaceId: workspace.workspaceId },
      { parentId: workspace.agentId, title: "Sheet child" },
    );
+    const grandchild = await seedSubagent(
+      { client: workspace.client, repoPath: workspace.cwd, workspaceId: workspace.workspaceId },
+      { parentId: child.id, title: "Sheet grandchild" },
+    );
    await openAgentRoute(page, { workspaceId: workspace.workspaceId, agentId: workspace.agentId });
    await expectOpenTabCount(page, 1);

@@ -79,12 +87,14 @@ test("compact opens files and subagents in a sheet, leaving the tabs for agents"
      await tapSheetBackdrop(page);
    });

-    await test.step("a subagent opens in a sheet over the subagents list", async () => {
+    await test.step("a subagent opens in place of the subagents list", async () => {
      await openSubagentFromCompactTrack(page, child.id);

      const childSheet = sheet(page, child.title);
      await expect(childSheet).toBeVisible();
      await expectSheetAtSnap(page, child.title);
+      await expectSubagentRowGone(page, child.id);
+      await expectOneSheetOpen(page);
      await expect(childSheet.getByRole("textbox", { name: "Message agent..." })).toHaveCount(0);
      // The composer's model, thinking, and mode stand in for it, resolved the same way. An idle
      // seeded agent has no context usage yet.
@@ -94,23 +104,51 @@ test("compact opens files and subagents in a sheet, leaving the tabs for agents"
      await expectOpenTabCount(page, 1);
    });

-    await test.step("closing the subagent's sheet uncovers the list", async () => {
-      await closeSheet(page, child.title);
+    await test.step("Back returns the sheet to the list", async () => {
+      await backToList(page, child.title);
      await expectSubagentRowVisible(page, child.id);
+      await expectOneSheetOpen(page);
+    });
+
+    await test.step("Close closes the list with the subagent", async () => {
+      await page.getByTestId(`subagents-track-row-${child.id}`).click();
+      await closeSheet(page, child.title);
+      await expectSubagentRowGone(page, child.id);
+      await expectNoSheetOpen(page);
    });

    await test.step("the parent box in a subagent's sheet closes it onto the parent", async () => {
-      await page.getByTestId(`subagents-track-row-${child.id}`).click();
+      await openSubagentFromCompactTrack(page, child.id);
      const childSheet = sheet(page, child.title);
      await expectSheetAtSnap(page, child.title);
      await expect(childSheet.getByTestId("composer-parent-agent-pill")).toHaveCount(0);
      await childSheet.getByTestId("parent-agent-callout-open").click();
      await expect(childSheet).toHaveCount(0);
+      await expectNoSheetOpen(page);
+      await expectOpenTabCount(page, 1);
+    });
+
+    await test.step("a nested subagent's parent box lands on its parent's sheet", async () => {
+      await openSubagentFromCompactTrack(page, child.id);
+      const childSheet = sheet(page, child.title);
+      await openSubagentFromCompactTrack(page, grandchild.id, childSheet);
+      const grandchildSheet = sheet(page, grandchild.title);
+      await expectSheetAtSnap(page, grandchild.title);
+      await expect(grandchildSheet.getByTestId("parent-agent-callout")).toContainText(child.title);
+
+      await grandchildSheet.getByTestId("parent-agent-callout-open").click();
+      await expect(grandchildSheet).toHaveCount(0);
+      await expect(childSheet).toBeVisible();
+      await expectOneSheetOpen(page);
+
+      await childSheet.getByTestId("parent-agent-callout-open").click();
+      await expect(childSheet).toHaveCount(0);
+      await expectNoSheetOpen(page);
      await expectOpenTabCount(page, 1);
    });

    await test.step("Open as tab promotes the subagent to a full tab and ends the list", async () => {
-      await page.getByTestId(`subagents-track-row-${child.id}`).click();
+      await openSubagentFromCompactTrack(page, child.id);
      await expectSheetAtSnap(page, child.title);
      await openSheetAsTab(page, child.title);
      await expect(page.getByTestId(`subagents-track-row-${child.id}`)).toHaveCount(0);
@@ -123,7 +161,7 @@ test("compact opens files and subagents in a sheet, leaving the tabs for agents"
      await expect(page.getByTestId(`subagents-track-row-${child.id}`)).toHaveCount(0);
    });

-    await test.step("once its tab closes, the subagent reopens in a sheet that keeps the list", async () => {
+    await test.step("once its tab closes, the subagent reopens in place of the list", async () => {
      await page
        .getByRole("button", { name: /Switch tabs/ })
        .filter({ visible: true })
@@ -141,7 +179,7 @@ test("compact opens files and subagents in a sheet, leaving the tabs for agents"

      await openSubagentFromCompactTrack(page, child.id);
      await expectSheetAtSnap(page, child.title);
-      await closeSheet(page, child.title);
+      await backToList(page, child.title);
      await expectSubagentRowVisible(page, child.id);
      await tapSheetBackdrop(page);
      await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
@@ -1,5 +1,7 @@
+import path from "node:path";
 import type { Locator } from "@playwright/test";
 import { expect, test, type Page } from "../support/fixtures";
+import { clickNewChat, gotoWorkspace } from "../support/helpers/launcher";
 import { expectComposerVisible } from "../support/helpers/composer";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";

@@ -214,3 +216,66 @@ test.describe("provider settings overlay stack", () => {
    }
  });
 });
+
+async function openTimedOutProvider(page: Page, workspaceId: string, width: number) {
+  await gotoWorkspace(page, workspaceId);
+  await clickNewChat(page);
+  await expectComposerVisible(page);
+  await page.setViewportSize({ width, height: 900 });
+  await page.getByRole("button", { name: /Select model/ }).click();
+  if (width < 600) {
+    await page.getByTestId("agent-controls-model").click();
+  } else {
+    await page.getByRole("button", { name: "Back", exact: true }).click();
+  }
+  await page.getByTestId("model-provider-picker-timeout").click();
+  await expect(page.getByText(/Timed out refreshing Pi timeout/)).toBeVisible();
+}
+
+async function expectErrorHasSideGutters(page: Page) {
+  const error = page.getByText(/Timed out refreshing Pi timeout/);
+  const bounds = await error.evaluate((element) => {
+    const text = element.getBoundingClientRect();
+    const state = element.parentElement!.getBoundingClientRect();
+    return { left: text.left - state.left, right: state.right - text.right };
+  });
+  expect(bounds.left, "error text stays inside the empty state's left edge").toBeGreaterThan(0);
+  expect(bounds.right, "error text stays inside the empty state's right edge").toBeGreaterThan(0);
+  await expect(page.getByRole("button", { name: "Retry", exact: true })).toBeVisible();
+}
+
+test.use({
+  e2eDaemonConfig: {
+    version: 1,
+    agents: {
+      catalogRefreshTimeoutMs: 2000,
+      providers: {
+        "picker-timeout": {
+          extends: "pi",
+          label: "Pi timeout",
+          enabled: true,
+          command: [
+            process.execPath,
+            path.resolve("e2e/fixtures/fake-pi-rpc.mjs"),
+            "--stall-model-discovery",
+          ],
+        },
+      },
+    },
+  },
+});
+
+test.describe("model discovery timeout", () => {
+  for (const width of [1200, 390]) {
+    test(`keeps a wrapped discovery error away from both picker edges at ${width}px`, async ({
+      page,
+      withWorkspace,
+    }, testInfo) => {
+      await page.setViewportSize({ width: 1200, height: 900 });
+      const workspace = await withWorkspace({ prefix: "model-error-spacing-" });
+      await openTimedOutProvider(page, workspace.workspaceId, width);
+      await page.screenshot({ path: testInfo.outputPath("model-error.png") });
+      await expectErrorHasSideGutters(page);
+    });
+  }
+});
@@ -479,3 +479,76 @@ test.describe("Settings — compact master-detail", () => {
    await expect(page.getByTestId("welcome-direct-connection")).toBeVisible();
  });
 });
+
+async function measureDockedNavigation(page: import("@playwright/test").Page, width: number) {
+  await page.setViewportSize({ width, height: 951 });
+  const history = page.getByRole("button", { name: /^History/ }).filter({ visible: true });
+  const settings = page
+    .getByRole("button", { name: "Settings", exact: true })
+    .filter({ visible: true });
+  await expect(history).toBeVisible();
+  await expect(settings).toBeVisible();
+  return {
+    width,
+    history: await history.evaluate((el) => el.getBoundingClientRect().height),
+    settings: await settings.evaluate((el) => el.getBoundingClientRect().height),
+  };
+}
+
+async function measureSettingsSplit(page: import("@playwright/test").Page, width: number) {
+  await page.setViewportSize({ width, height: 951 });
+  const sidebar = page.getByTestId("settings-sidebar");
+  const detail = page.getByTestId("settings-detail-pane");
+  await expect(sidebar).toBeVisible();
+  await expect(detail).toBeVisible();
+  return {
+    width,
+    sidebar: await sidebar.evaluate((el) => el.getBoundingClientRect().width),
+    detail: await detail.evaluate((el) => el.getBoundingClientRect().width),
+  };
+}
+
+async function expectConsistentDockedNavigation(page: import("@playwright/test").Page) {
+  const wide = await measureDockedNavigation(page, 951);
+  for (const width of [600, 669, 719, 720]) {
+    const narrow = await measureDockedNavigation(page, width);
+    expect
+      .soft(narrow.history, `History keeps its wide-layout density at ${width}`)
+      .toBeCloseTo(wide.history, 0);
+    expect
+      .soft(narrow.settings, `Settings keeps its wide-layout density at ${width}`)
+      .toBeCloseTo(wide.settings, 0);
+  }
+}
+
+async function expectSettingsDetailKeepsReadingWidth(page: import("@playwright/test").Page) {
+  const reference = await measureSettingsSplit(page, 720);
+  for (const width of [600, 669, 719]) {
+    const narrow = await measureSettingsSplit(page, width);
+    expect
+      .soft(narrow.detail, `Settings preserves its detail budget at ${width}`)
+      .toBeGreaterThanOrEqual(reference.detail);
+    expect
+      .soft(narrow.sidebar, `Settings navigation yields width at ${width}`)
+      .toBeLessThan(reference.sidebar);
+  }
+  const wide = await measureSettingsSplit(page, 951);
+  expect(wide.sidebar).toBeCloseTo(reference.sidebar, 0);
+  expect(wide.detail).toBeGreaterThan(reference.detail);
+}
+
+test("docked navigation keeps its density and Settings preserves reading width", async ({
+  page,
+  withWorkspace,
+}) => {
+  const workspace = await withWorkspace({ prefix: "narrow-wide-layout-" });
+  await gotoWorkspace(page, workspace.workspaceId);
+  await expectConsistentDockedNavigation(page);
+  await openSettings(page);
+  await openSettingsSection(page, "appearance");
+  await expectAppearanceContent(page);
+  await expectSettingsDetailKeepsReadingWidth(page);
+  await page.setViewportSize({ width: 599, height: 951 });
+  await expectSettingsSidebarHidden(page);
+  await expectAppearanceContent(page);
+});
@@ -1,8 +1,15 @@
-import type { Page } from "@playwright/test";
+import type { Locator, Page } from "@playwright/test";
 import { test, expect } from "../support/fixtures";
+import { scrollChatAwayFromBottom } from "../support/helpers/agent-bottom-anchor";
+import { gateSecondToolCall } from "../support/helpers/tool-call-gate";
 import { expectComposerVisible } from "../support/helpers/composer";
 import { daemonWsRoutePattern } from "../support/helpers/daemon-port";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+import {
+  readReactRenders,
+  recordReactRenders,
+  resetReactRenders,
+} from "../support/helpers/react-renders";

 type WebSocketMessage = string | Buffer;

@@ -115,23 +122,27 @@ async function holdStreamAfterFirstCompletedToolCall(page: Page, agentId: string
    });
  });

+  function appendCompletedCalls(extraCompletedCalls: number) {
+    if (extraCompletedCalls > 0 && (!firstCallId || !firstCompletedMessage)) {
+      throw new Error("Expected the first completed tool call before release");
+    }
+    for (let index = 0; index < extraCompletedCalls; index += 1) {
+      sendToPage?.(
+        cloneToolCallWithId(
+          firstCompletedMessage as WebSocketMessage,
+          `${firstCallId}:${sequenceOffset + index}`,
+          sequenceOffset + index + 1,
+        ),
+      );
+    }
+    sequenceOffset += extraCompletedCalls;
+  }
  return {
    waitForFirstCompleted: () => firstCompleted,
+    appendCompletedCalls,
    release(extraCompletedCalls = 0) {
      isHolding = false;
-      if (extraCompletedCalls > 0 && (!firstCallId || !firstCompletedMessage)) {
-        throw new Error("Expected the first completed tool call before release");
-      }
-      for (let index = 0; index < extraCompletedCalls; index += 1) {
-        sendToPage?.(
-          cloneToolCallWithId(
-            firstCompletedMessage as WebSocketMessage,
-            `${firstCallId}:${index}`,
-            index + 1,
-          ),
-        );
-      }
-      sequenceOffset = extraCompletedCalls;
+      appendCompletedCalls(extraCompletedCalls);
      for (const message of heldMessages.splice(0)) {
        sendToPage?.(shiftTimelineSequence(message, sequenceOffset));
      }
@@ -139,17 +150,24 @@ async function holdStreamAfterFirstCompletedToolCall(page: Page, agentId: string
  };
 }

-async function configureOverviewToolCalls(page: Page): Promise<void> {
-  await page.addInitScript(() => {
+type OverviewChatDisplay = "collapseToolCalls" | "collapseTurns";
+
+// Expand thinking keeps reasoning out of tool call runs, so the first tool call starts alone.
+async function configureOverviewToolCalls(page: Page, chatDisplay: OverviewChatDisplay) {
+  await page.addInitScript((display) => {
    localStorage.setItem(
      "@paseo:app-settings",
-      JSON.stringify({ chatDisplay: "collapseToolCalls" }),
+      JSON.stringify({ chatDisplay: display, autoExpandReasoning: true }),
    );
-  });
+  }, chatDisplay);
 }

-async function createOverviewAgent(page: Page, title: string) {
-  await configureOverviewToolCalls(page);
+async function createOverviewAgent(
+  page: Page,
+  title: string,
+  chatDisplay: OverviewChatDisplay = "collapseToolCalls",
+) {
+  await configureOverviewToolCalls(page, chatDisplay);
  return seedMockAgentWorkspace({
    repoPrefix: "tool-call-overview-sheet-",
    title,
@@ -204,6 +222,36 @@ function readScrollMetrics(root: HTMLElement) {
  };
 }

+const FIRST_CALL_DETAILS = "export function ConversationList()";
+
+function firstToolCall(page: Page): Locator {
+  return page.getByTestId("tool-call-badge").filter({ hasText: "conversation-list.tsx" }).first();
+}
+
+async function openToolDetails(badge: Locator): Promise<void> {
+  await badge.getByRole("button").first().click();
+}
+
+async function timelineRowOf(locator: Locator) {
+  const row = await locator.locator("xpath=ancestor::*[@data-history-row-id][1]").elementHandle();
+  if (!row) throw new Error("Expected the locator inside a timeline row");
+  return row;
+}
+
+/** Whether the locator renders inside this exact row node, i.e. the row was not remounted. */
+async function isInsideRow(
+  locator: Locator,
+  row: Awaited<ReturnType<typeof timelineRowOf>>,
+): Promise<boolean> {
+  return locator.evaluate((node, previousRow) => previousRow.contains(node), row);
+}
+
+async function topOf(row: Locator): Promise<number> {
+  const box = await row.boundingBox();
+  if (!box) throw new Error("Expected a visible timeline row");
+  return box.y;
+}
+
 test.describe("compact overview tool calls", () => {
  test.use({ viewport: COMPACT_VIEWPORT, hasTouch: true });

@@ -219,8 +267,16 @@ test.describe("compact overview tool calls", () => {
      await agent.client.sendAgentMessage(agent.agentId, "Exercise the overview tool-call sheet.");
      await gate.waitForFirstCompleted();

+      const single = firstToolCall(page);
+      await expect(single).toBeVisible();
+      await expect(page.getByTestId("tool-call-group")).toHaveCount(0);
+      await openToolDetails(single);
+      await expect(page.getByTestId("tool-call-sheet-close")).toBeVisible();
+      await page.getByTestId("tool-call-sheet-close").click();
+      gate.appendCompletedCalls(1);
      const group = page.getByTestId("tool-call-group").first();
      await expect(group).toBeVisible();
+      await expect(page.getByTestId("tool-call-group-sheet")).toBeHidden();
      await group.click();

      const sheet = page.getByTestId("tool-call-group-sheet");
@@ -261,27 +317,86 @@ test.describe("compact overview tool calls", () => {
  });
 });

-test("keeps overview tool calls inline on desktop", async ({ page }) => {
+for (const display of ["collapseToolCalls", "collapseTurns"] as const) {
+  test(`keeps an opened lone tool call open when it becomes a group (${display})`, async ({
+    page,
+  }) => {
+    test.setTimeout(120_000);
+    const agent = await createOverviewAgent(page, "Desktop overview tool calls", display);
+    await recordReactRenders(page);
+    try {
+      const gate = await gateSecondToolCall(page, agent.agentId);
+      await openOverviewAgent(page, agent);
+      await agent.client.sendAgentMessage(agent.agentId, "Exercise desktop overview tool calls.");
+      await gate.waitForFirstCompleted();
+      const lone = firstToolCall(page);
+      const group = page.getByTestId("tool-call-group").first();
+      const details = page.getByText(FIRST_CALL_DETAILS);
+
+      await test.step("a lone tool call shows as itself", async () => {
+        await expect(lone).toBeVisible();
+        await expect(group).toHaveCount(0);
+      });
+
+      await gate.waitForSecondRunning();
+      await test.step("opening it re-renders that tool call and nothing else", async () => {
+        await resetReactRenders(page);
+        await openToolDetails(lone);
+        await expect(details).toBeVisible();
+        const renders = await readReactRenders(page);
+        expect(renders.AgentStreamView ?? 0).toBe(0);
+        expect(renders.StreamRowContent ?? 0).toBe(0);
+        expect(renders.ToolCall).toBe(1);
+      });
+
+      await test.step("the second call forms an open group around the opened call", async () => {
+        // Reading above the tail, the row holds still; at the tail the new rows push it up.
+        await scrollChatAwayFromBottom(page, { deltaY: -160, minDistanceFromBottom: 72 });
+        const loneTop = await topOf(lone);
+        const loneRow = await timelineRowOf(lone);
+        await resetReactRenders(page);
+        gate.releaseSecondRunning();
+        await expect(group.getByTestId("tool-call-badge")).toHaveCount(2);
+        await expect(group.getByText(FIRST_CALL_DETAILS)).toBeVisible();
+        expect(await isInsideRow(group, loneRow)).toBe(true);
+        expect(Math.abs((await topOf(group)) - loneTop)).toBeLessThanOrEqual(2);
+        expect((await readReactRenders(page)).AgentStreamView).toBeGreaterThan(0);
+        await expect(page.getByTestId("tool-call-group-sheet")).toHaveCount(0);
+      });
+
+      await test.step("closing and reopening the group keeps the call open", async () => {
+        await openToolDetails(group);
+        await expect(group.getByTestId("tool-call-badge")).toHaveCount(0);
+        await expect(details).toHaveCount(0);
+        await openToolDetails(group);
+        await expect(group.getByTestId("tool-call-badge")).toHaveCount(2);
+        await expect(group.getByText(FIRST_CALL_DETAILS)).toBeVisible();
+      });
+    } finally {
+      await agent.cleanup();
+    }
+  });
+}
+
+test("forms a closed group when the lone tool call was left closed", async ({ page }) => {
  test.setTimeout(120_000);
-  const agent = await createOverviewAgent(page, "Desktop overview tool calls");
-
+  const agent = await createOverviewAgent(page, "Closed desktop overview tool calls");
  try {
-    const gate = await holdStreamAfterFirstCompletedToolCall(page, agent.agentId);
+    const gate = await gateSecondToolCall(page, agent.agentId);
    await openOverviewAgent(page, agent);
-    await agent.client.sendAgentMessage(agent.agentId, "Exercise desktop overview tool calls.");
+    await agent.client.sendAgentMessage(agent.agentId, "Leave the first tool call closed.");
    await gate.waitForFirstCompleted();
+    const lone = firstToolCall(page);
    const group = page.getByTestId("tool-call-group").first();
+    await expect(lone).toBeVisible();
+    await expect(group).toHaveCount(0);
+
+    await gate.waitForSecondRunning();
+    const loneTop = await topOf(lone);
+    gate.releaseSecondRunning();
    await expect(group).toBeVisible();
-
-    // Keep streaming layout changes out of the pointer-down/pointer-up interval.
-    const header = group.getByRole("button").first();
-    await header.click();
-    await expect(group.getByTestId("tool-call-badge").first()).toBeVisible();
-    await expect(page.getByTestId("tool-call-group-sheet")).toHaveCount(0);
-
-    gate.release(1);
-    await expect.poll(() => group.getByTestId("tool-call-badge").count()).toBeGreaterThanOrEqual(2);
-    await expect(page.getByTestId("tool-call-group-sheet")).toHaveCount(0);
+    await expect(group.getByTestId("tool-call-badge")).toHaveCount(0);
+    expect(Math.abs((await topOf(group)) - loneTop)).toBeLessThanOrEqual(2);
  } finally {
    await agent.cleanup();
  }
@@ -1,11 +1,9 @@
-import type { Locator, Page } from "@playwright/test";
+import type { Locator } from "@playwright/test";
 import { test, expect } from "../support/fixtures";
-import { daemonWsRoutePattern } from "../support/helpers/daemon-port";
+import { gateSecondToolCall } from "../support/helpers/tool-call-gate";
 import { expectComposerVisible } from "../support/helpers/composer";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";

-type WebSocketMessage = string | Buffer;
-
 interface ShimmerEvidence {
  animationDuration: string;
  endPx: number;
@@ -14,127 +12,6 @@ interface ShimmerEvidence {
  startPx: number;
 }

-function parseSessionMessage(message: WebSocketMessage): Record<string, unknown> | null {
-  const raw = typeof message === "string" ? message : message.toString("utf8");
-  try {
-    const envelope = JSON.parse(raw) as { type?: unknown; message?: unknown };
-    return envelope.type === "session" && envelope.message && typeof envelope.message === "object"
-      ? (envelope.message as Record<string, unknown>)
-      : null;
-  } catch {
-    return null;
-  }
-}
-
-function getToolCallStatus(
-  message: WebSocketMessage,
-  agentId: string,
-): { callId: string; status: string } | null {
-  const sessionMessage = parseSessionMessage(message);
-  if (sessionMessage?.type !== "agent_stream") {
-    return null;
-  }
-  const payload = sessionMessage.payload as Record<string, unknown> | undefined;
-  if (payload?.agentId !== agentId) {
-    return null;
-  }
-  const event = payload.event as Record<string, unknown> | undefined;
-  const item = event?.item as Record<string, unknown> | undefined;
-  return event?.type === "timeline" &&
-    item?.type === "tool_call" &&
-    typeof item.callId === "string" &&
-    typeof item.status === "string"
-    ? { callId: item.callId, status: item.status }
-    : null;
-}
-
-function replaceToolCallStatus(message: WebSocketMessage, status: string): string {
-  const raw = typeof message === "string" ? message : message.toString("utf8");
-  const envelope = JSON.parse(raw) as {
-    message?: { payload?: { event?: { item?: { status?: string } } } };
-  };
-  const item = envelope.message?.payload?.event?.item;
-  if (!item) {
-    throw new Error("Expected a tool-call session message");
-  }
-  item.status = status;
-  return JSON.stringify(envelope);
-}
-
-async function gateSecondToolCall(page: Page, agentId: string) {
-  let firstCallId: string | null = null;
-  let secondCallId: string | null = null;
-  let secondRunningMessage: WebSocketMessage | null = null;
-  let pauseAfterSecondRunning = false;
-  let releaseSecondRequested = false;
-  let forwardSecondRunning: (() => void) | null = null;
-  let resolveFirstCompleted!: () => void;
-  let resolveSecondRunning!: () => void;
-  const firstCompleted = new Promise<void>((resolve) => {
-    resolveFirstCompleted = resolve;
-  });
-  const secondRunning = new Promise<void>((resolve) => {
-    resolveSecondRunning = resolve;
-  });
-
-  await page.routeWebSocket(daemonWsRoutePattern(), (ws) => {
-    const server = ws.connectToServer();
-    forwardSecondRunning = () => {
-      if (secondRunningMessage) {
-        ws.send(secondRunningMessage);
-        secondRunningMessage = null;
-      }
-    };
-    ws.onMessage((message) => server.send(message));
-    server.onMessage((message) => {
-      if (pauseAfterSecondRunning) {
-        return;
-      }
-
-      const toolCall = getToolCallStatus(message, agentId);
-      if (!toolCall) {
-        ws.send(message);
-        return;
-      }
-
-      if (!firstCallId) {
-        firstCallId = toolCall.callId;
-      }
-      if (toolCall.callId === firstCallId) {
-        ws.send(message);
-        if (toolCall.status === "completed") {
-          resolveFirstCompleted();
-        }
-        return;
-      }
-
-      secondCallId ??= toolCall.callId;
-      if (toolCall.callId === secondCallId) {
-        const transformedMessage =
-          toolCall.status === "completed" ? replaceToolCallStatus(message, "running") : message;
-        secondRunningMessage = transformedMessage;
-        pauseAfterSecondRunning = true;
-        resolveSecondRunning();
-        if (releaseSecondRequested) {
-          forwardSecondRunning?.();
-        }
-        return;
-      }
-
-      ws.send(message);
-    });
-  });
-
-  return {
-    waitForFirstCompleted: () => firstCompleted,
-    waitForSecondRunning: () => secondRunning,
-    releaseSecondRunning() {
-      releaseSecondRequested = true;
-      forwardSecondRunning?.();
-    },
-  };
-}
-
 async function readShimmerEvidence(locator: Locator): Promise<ShimmerEvidence> {
  return locator.evaluate((root) => {
    const shimmer = Array.from(root.querySelectorAll<HTMLElement>("*")).find((element) =>
@@ -203,6 +203,47 @@ test("received messages show their sender and open that agent", async ({ page })
  }
 });

+test("long sender attribution stays on one line in compact chat", async ({ page }, testInfo) => {
+  await page.setViewportSize({ width: 390, height: 844 });
+  await page.addInitScript(() =>
+    localStorage.setItem("@paseo:app-settings", JSON.stringify({ theme: "dark" })),
+  );
+  const recipient = await seedMockAgentWorkspace({
+    repoPrefix: "compact-attribution-",
+    title: "Implementation",
+  });
+  try {
+    const title = "Reviewer checking the compact chat timeline and sender attribution";
+    const sender = await recipient.client.createAgent({
+      provider: "codex",
+      cwd: recipient.cwd,
+      workspaceId: recipient.workspaceId,
+      title,
+      model: "gpt-6.1-sol",
+      modeId: "full-access",
+    });
+    await recipient.client.sendAgentMessage(
+      recipient.agentId,
+      "The sender label stays on one line, even when the agent has a long name.",
+      { sourceAgentId: sender.id },
+    );
+    await openAgentRoute(page, recipient);
+    await expectComposerVisible(page);
+    const attribution = page.getByRole("button", { name: `Sent by ${title}`, exact: true });
+    await expect(attribution).toBeVisible();
+    await expectSenderTruncatedWithinMessage(attribution, title);
+    await expectSenderAlignedWithBubble(attribution);
+    await attribution.scrollIntoViewIfNeeded();
+    await page.screenshot({ path: testInfo.outputPath("sender-compact-390.png") });
+    await page.setViewportSize({ width: 320, height: 740 });
+    await expectSenderTruncatedWithinMessage(attribution, title);
+    await expectSenderAlignedWithBubble(attribution);
+    await page.screenshot({ path: testInfo.outputPath("sender-compact-320.png") });
+  } finally {
+    await recipient.cleanup();
+  }
+});
+
 interface MessagePreviewWatch {
  /** Frames after the watch started on which the fade or "Show more" control was missing. */
  framesWithoutClip: number[];
@@ -316,6 +357,20 @@ test("opening a turn keeps the received message above it clipped on every frame"
  }
 });

+async function expectSenderTruncatedWithinMessage(attribution: Locator, title: string) {
+  const label = attribution.getByText(`Sent by ${title}`, { exact: true });
+  await expect(label).toHaveCSS("white-space", "nowrap");
+  await expect(label).toHaveCSS("text-overflow", "ellipsis");
+  const bounds = await label.evaluate((element) => ({
+    textWidth: element.scrollWidth,
+    visibleWidth: element.clientWidth,
+    right: element.getBoundingClientRect().right,
+    viewportWidth: document.documentElement.clientWidth,
+  }));
+  expect(bounds.textWidth).toBeGreaterThan(bounds.visibleWidth);
+  expect(bounds.right).toBeLessThanOrEqual(bounds.viewportWidth);
+}
+
 async function expectSenderAlignedWithBubble(attribution: Locator) {
  const edges = await attribution.evaluate((button) => {
    const bubble = button.nextElementSibling;
@@ -475,7 +530,20 @@ async function expectThinkingPresentation(page: Page, autoExpandReasoning: boole
    await expect(group).toContainText(/read 1 file/i);
    await expect(group.getByRole("button").first()).not.toContainText(/thought/i);
    await group.getByRole("button").first().click();
-    await expect(reasoning).toBeVisible();
+    // Expand thinking is off: the group opens its rows, but the thought row stays closed
+    // until the reader opens it.
+    const thought = group
+      .getByTestId("tool-call-badge")
+      .filter({ hasText: /^Thinking/ })
+      .first();
+    await expect(thought).toBeVisible();
+    await expect(reasoning).toHaveCount(0);
+    // A press right after the group opens occasionally does not register; retry until the
+    // thought row opens.
+    await expect(async () => {
+      await thought.getByRole("button").first().click();
+      await expect(reasoning).toBeVisible({ timeout: 2_000 });
+    }).toPass();
  }
 }

@@ -6,6 +6,7 @@ for await (const line of lines) {
  const command = JSON.parse(line);
  let data = {};
  if (command.type === "get_available_models") {
+    if (process.argv.includes("--stall-model-discovery")) continue;
    data = {
      models: [
        {
@@ -0,0 +1,14 @@
+# Native user message preview
+
+Open a chat with a user message containing 16 newline-separated lines of
+`Preview line N`, with N from 1 to 16. Scroll the message into view on a
+phone-sized Android emulator or iOS simulator. Its text must exceed the 240-point preview cap,
+while its expanded bubble and toggle fit in the chat viewport. Close any other
+expanded messages so the toggle labels identify this message.
+
+Replay `native-user-message-preview.android.ad` or
+`native-user-message-preview.ios.ad` through the existing mobile runner or
+agent-device. It checks that a clipped message offers Show more and
+that two expand/collapse round trips keep both controls reachable. Before the
+fix, the first Show more assertion fails because native layout reports the
+capped height as the full content height.
@@ -0,0 +1,14 @@
+context platform=android timeout=60000 retries=0
+env APP_ID=sh.paseo.debug
+
+open "${APP_ID}"
+wait "role=\"button\" label=\"Show more\"" 10000
+press "role=\"button\" label=\"Show more\""
+wait "role=\"button\" label=\"Show less\"" 10000
+press "role=\"button\" label=\"Show less\""
+wait "role=\"button\" label=\"Show more\"" 10000
+press "role=\"button\" label=\"Show more\""
+wait "role=\"button\" label=\"Show less\"" 10000
+press "role=\"button\" label=\"Show less\""
+wait "role=\"button\" label=\"Show more\"" 10000
+close
@@ -0,0 +1,14 @@
+context platform=ios timeout=60000 retries=0
+env APP_ID=sh.paseo.debug
+
+open "${APP_ID}"
+wait "role=\"button\" label=\"Show more\"" 10000
+press "role=\"button\" label=\"Show more\""
+wait "role=\"button\" label=\"Show less\"" 10000
+press "role=\"button\" label=\"Show less\""
+wait "role=\"button\" label=\"Show more\"" 10000
+press "role=\"button\" label=\"Show more\""
+wait "role=\"button\" label=\"Show less\"" 10000
+press "role=\"button\" label=\"Show less\""
+wait "role=\"button\" label=\"Show more\"" 10000
+close
@@ -12,6 +12,22 @@ point and Metro workflow in [status-ring](../status-ring/README.md), importing
 `MarkdownFormattingRegression` from `./e2e/mobile/markdown-formatting/native`.
 Open the same Metro URL in a browser to compare web. Restore `index.ts` afterward.

+With this fixture open in an Android Agent Device session, run:
+
+```sh
+node packages/app/e2e/mobile/markdown-formatting/android.mjs <session>
+```
+
+The runner switches to paragraphs with long inline code at a fixed 300 dp width.
+It compares the native Markdown host’s bottom with its last TextView’s bottom,
+then repeats in compact mode and after restoring regular text. More than one
+pixel of surplus fails. Keep the whole fixture visible: clipped accessibility
+bounds cannot establish measurement parity.
+
+`scripts/postinstall-patches.test.mjs` regenerates both platforms’ props and
+compares them with the shipped headers. This catches missing C++ fields in the
+measurement path, which the Kotlin tests cannot exercise.
+
 The package patch contains `InlineCodeFormattingTest`, which exercises actual
 Android spans in Robolectric native graphics mode, covering draw and measurement,
 span order, code inside paragraph/heading sizes, bold/italic composition, and
@@ -0,0 +1,60 @@
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+
+const session = process.argv[2];
+assert(session, "Pass an Android agent-device session serving native.tsx");
+function ad(...args) {
+  return execFileSync("agent-device", ["--session", session, ...args], {
+    encoding: "utf8",
+    timeout: 60_000,
+  });
+}
+
+function assertMeasurementParity(mode) {
+  const snapshot = JSON.parse(ad("snapshot", "--raw", "--json"));
+  assert.equal(snapshot.success, true);
+  const nodes = snapshot.data.nodes;
+  let last = nodes.find((node) => node.label?.endsWith("End of measurement fixture."));
+  assert(last?.rect, "The last paragraph must be visible, including its bottom");
+  // EnrichedMarkdownText exposes paragraph accessibility nodes inside its TextView;
+  // EnrichedMarkdown exposes the TextViews themselves. Measure the native child.
+  let host = nodes.find((node) => node.index === last.parentIndex);
+  if (host?.type === "android.widget.TextView") {
+    last = host;
+    host = nodes.find((node) => node.index === last.parentIndex);
+  }
+  assert.equal(host?.type, "android.widget.FrameLayout");
+  const viewport = nodes.find((node) => node.type === "android.widget.ScrollView");
+  const footer = nodes.find((node) => node.label === "End of Markdown host");
+  assert(viewport?.rect && footer?.rect, "The fixture and footer must be visible");
+  assert(
+    host.rect.y >= viewport.rect.y &&
+      footer.rect.y + footer.rect.height <= viewport.rect.y + viewport.rect.height,
+    "The whole fixture must fit in the viewport; clipped bounds cannot prove parity",
+  );
+  const hostBottom = host.rect.y + host.rect.height;
+  const childBottom = last.rect.y + last.rect.height;
+  console.log(
+    JSON.stringify({
+      mode,
+      host: host.rect,
+      lastChild: last.rect,
+      surplus: hostBottom - childBottom,
+    }),
+  );
+  assert(
+    Math.abs(hostBottom - childBottom) <= 1,
+    `Markdown reserves blank space in ${mode}: host bottom ${hostBottom}, last child bottom ${childBottom}`,
+  );
+}
+
+ad("press", 'label="Show wrapping fixture"');
+ad("wait", "text", "End of Markdown host", "10000");
+assertMeasurementParity("regular");
+ad("press", 'label="Use compact text"');
+ad("wait", "text", "Use regular text", "10000");
+assertMeasurementParity("compact");
+ad("press", 'label="Use regular text"');
+ad("wait", "text", "Use compact text", "10000");
+assertMeasurementParity("regular restored");
+console.log("PASS Android Markdown host measurement matches its last child");
@@ -1,6 +1,6 @@
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { useCallback, useState } from "react";
-import { Button, ScrollView, Text } from "react-native";
+import { Button, ScrollView, Text, View } from "react-native";
 import { StyleSheet } from "react-native-unistyles";
 import { GestureHandlerRootView } from "react-native-gesture-handler";
 import { MarkdownRenderer } from "@/components/markdown/renderer";
@@ -10,6 +10,7 @@ const styles = StyleSheet.create((theme) => ({
  scroll: { backgroundColor: theme.colors.surface0 },
  content: { padding: 32, paddingTop: 60 },
  title: { color: theme.colors.foreground },
+  wrapping: { width: 300 },
 }));

 const queryClient = new QueryClient();
@@ -32,7 +33,15 @@ const source = [
  "Normal **bold** and *italic* prose.",
 ].join("\n\n");

+const wrappingSource = [
+  "Measurement parity. Take a repo with a gitignored `.env` in the main checkout and a `.worktreeinclude` containing `.env`.",
+  "Every creation path goes through `createPaseoWorktreeWorkflow` in `worktree-session.ts:341`, before `createAgent` in `creation/index.ts:160-174` starts.",
+  "The built-in plugin lives in `plugins/worktree-include/index.server.ts` and copies `paseo.json` beside `.worktreeinclude`. End of measurement fixture.",
+].join("\n\n");
+
 export default function MarkdownFormattingRegression() {
+  const [wrapping, setWrapping] = useState(false);
+  const toggleWrapping = useCallback(() => setWrapping((value) => !value), []);
  const [compact, setCompact] = useState(false);
  const toggleCompact = useCallback(() => setCompact((value) => !value), []);
  return (
@@ -44,7 +53,14 @@ export default function MarkdownFormattingRegression() {
            title={compact ? "Use regular text" : "Use compact text"}
            onPress={toggleCompact}
          />
-          <MarkdownRenderer text={source} compact={compact} />
+          <Button
+            title={wrapping ? "Show formatting fixture" : "Show wrapping fixture"}
+            onPress={toggleWrapping}
+          />
+          <View style={wrapping ? styles.wrapping : undefined}>
+            <MarkdownRenderer text={wrapping ? wrappingSource : source} compact={compact} />
+          </View>
+          <Text style={styles.title}>End of Markdown host</Text>
        </ScrollView>
      </GestureHandlerRootView>
    </QueryClientProvider>
@@ -0,0 +1,78 @@
+import type { Page } from "@playwright/test";
+
+declare global {
+  var __PASEO_E2E_REACT_RENDERS__: Record<string, number> | undefined;
+}
+
+/**
+ * Counts which components render in each React commit, by name, the way React DevTools
+ * highlights updates: a fiber rendered when React performed work on it in that commit.
+ * Install before the app loads; React registers with the DevTools hook at startup.
+ */
+export async function recordReactRenders(page: Page): Promise<void> {
+  await page.addInitScript(() => {
+    const PERFORMED_WORK = 1;
+    interface Fiber {
+      type: unknown;
+      flags: number;
+      child: Fiber | null;
+      sibling: Fiber | null;
+      alternate: Fiber | null;
+    }
+    const nameOf = (type: unknown): string | null => {
+      if (typeof type === "function") {
+        return (type as { displayName?: string }).displayName || type.name || null;
+      }
+      if (!type || typeof type !== "object") return null;
+      const component = type as { displayName?: string; render?: unknown; type?: unknown };
+      return component.displayName || nameOf(component.render) || nameOf(component.type);
+    };
+    const record = (root: Fiber) => {
+      const renders = (globalThis.__PASEO_E2E_REACT_RENDERS__ ??= {});
+      const pending: Fiber[] = [root];
+      while (pending.length > 0) {
+        const fiber = pending.pop()!;
+        const name = typeof fiber.type === "string" ? null : nameOf(fiber.type);
+        if (name && (fiber.flags & PERFORMED_WORK) !== 0) renders[name] = (renders[name] ?? 0) + 1;
+        // A subtree React bailed out of is shared with the previous commit; skip it.
+        if (fiber.alternate && fiber.child === fiber.alternate.child) continue;
+        for (let child = fiber.child; child; child = child.sibling) pending.push(child);
+      }
+    };
+    let rendererCount = 0;
+    Object.defineProperty(globalThis, "__REACT_DEVTOOLS_GLOBAL_HOOK__", {
+      configurable: true,
+      value: {
+        supportsFiber: true,
+        isDisabled: false,
+        renderers: new Map(),
+        inject(renderer: unknown) {
+          rendererCount += 1;
+          this.renderers.set(rendererCount, renderer);
+          return rendererCount;
+        },
+        checkDCE() {},
+        onScheduleFiberRoot() {},
+        onCommitFiberRoot(_rendererId: number, root: { current: Fiber }) {
+          record(root.current);
+        },
+        onPostCommitFiberRoot() {},
+        onCommitFiberUnmount() {},
+      },
+    });
+  });
+}
+
+export async function resetReactRenders(page: Page): Promise<void> {
+  await page.evaluate(() => {
+    globalThis.__PASEO_E2E_REACT_RENDERS__ = {};
+  });
+}
+
+/** Render counts per component name since the last reset, read after the next painted frame. */
+export async function readReactRenders(page: Page): Promise<Record<string, number>> {
+  return page.evaluate(async () => {
+    await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
+    return { ...globalThis.__PASEO_E2E_REACT_RENDERS__ };
+  });
+}
@@ -5,7 +5,7 @@ export function sheet(page: Page, label: string): Locator {
  return page.getByRole("dialog", { name: label });
 }

-/** A sheet tab's header, which carries its title, Close, and the Open as tab glyph. */
+/** A sheet tab's header, which carries its title, Back, Close, and the Open as tab glyph. */
 export function sheetHeader(page: Page, label: string): Locator {
  return page.getByTestId("sheet-tab-header").filter({ hasText: label });
 }
@@ -48,6 +48,12 @@ export async function closeSheet(page: Page, label: string): Promise<void> {
  await expect(sheet(page, label)).toHaveCount(0);
 }

+/** Steps a sheet opened from a list back to that list, in the same sheet. */
+export async function backToList(page: Page, label: string): Promise<void> {
+  await sheetHeader(page, label).getByRole("button", { name: "Back" }).click();
+  await expect(sheet(page, label)).toHaveCount(0);
+}
+
 export async function openSheetAsTab(page: Page, label: string): Promise<void> {
  await sheetHeader(page, label).getByRole("button", { name: "Open as tab" }).click();
  await expect(sheet(page, label)).toHaveCount(0);
@@ -76,6 +82,15 @@ export async function selectTabFromSwitcher(page: Page, label: string): Promise<
  await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
 }

+/** Each open sheet renders its own backdrop, so counting them counts the sheets. */
+export async function expectOneSheetOpen(page: Page): Promise<void> {
+  await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(1);
+}
+
+export async function expectNoSheetOpen(page: Page): Promise<void> {
+  await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+}
+
 /** Taps the top sheet's backdrop; each stacked sheet renders its own, top last. */
 export async function tapSheetBackdrop(page: Page): Promise<void> {
  await page
@@ -3,7 +3,7 @@ import { startIsolatedHostDaemon } from "./isolated-host-daemon";
 import { seedWorkspace } from "./seed-client";
 import { getE2EDaemonPort } from "./daemon-port";
 import { PARENT_AGENT_ID_LABEL } from "@getpaseo/protocol/agent-labels";
-import { expect, type Page } from "@playwright/test";
+import { expect, type Locator, type Page } from "@playwright/test";
 import { daemonWsRoutePattern } from "./daemon-port";
 import type { SeededWorkspace } from "./seed-client";

@@ -151,10 +151,21 @@ export async function openSubagentsTrack(page: Page): Promise<void> {
  await expect(panel).toBeVisible({ timeout: 30_000 });
 }

-/** On compact the track opens as a sheet, which closes once a row is chosen. */
-export async function openSubagentFromCompactTrack(page: Page, childId: string): Promise<void> {
-  await page.getByTestId("subagents-track-header").click();
-  await page.getByTestId(`subagents-track-row-${childId}`).click();
+/**
+ * On compact the track opens as a sheet, and the chosen row opens in its place. `track` is the
+ * pane whose track to open, for when a subagent's sheet shows a track of its own.
+ */
+export async function openSubagentFromCompactTrack(
+  page: Page,
+  childId: string,
+  track: Page | Locator = page,
+): Promise<void> {
+  await track.getByTestId("subagents-track-header").click();
+  const row = page.getByTestId(`subagents-track-row-${childId}`);
+  // Tap the row once the sheet has brought it on screen, as a finger would. Clicking it while it is
+  // still below the fold makes Playwright scroll the sheet host, and every sheet then docks short.
+  await expect(row).toBeInViewport();
+  await row.click();
 }

 export async function expectSubagentRowVisible(page: Page, childId: string): Promise<void> {
@@ -0,0 +1,125 @@
+import type { Page } from "@playwright/test";
+import { daemonWsRoutePattern } from "./daemon-port";
+
+type WebSocketMessage = string | Buffer;
+
+function parseSessionMessage(message: WebSocketMessage): Record<string, unknown> | null {
+  const raw = typeof message === "string" ? message : message.toString("utf8");
+  try {
+    const envelope = JSON.parse(raw) as { type?: unknown; message?: unknown };
+    return envelope.type === "session" && envelope.message && typeof envelope.message === "object"
+      ? (envelope.message as Record<string, unknown>)
+      : null;
+  } catch {
+    return null;
+  }
+}
+
+function getToolCallStatus(
+  message: WebSocketMessage,
+  agentId: string,
+): { callId: string; status: string } | null {
+  const sessionMessage = parseSessionMessage(message);
+  if (sessionMessage?.type !== "agent_stream") {
+    return null;
+  }
+  const payload = sessionMessage.payload as Record<string, unknown> | undefined;
+  if (payload?.agentId !== agentId) {
+    return null;
+  }
+  const event = payload.event as Record<string, unknown> | undefined;
+  const item = event?.item as Record<string, unknown> | undefined;
+  return event?.type === "timeline" &&
+    item?.type === "tool_call" &&
+    typeof item.callId === "string" &&
+    typeof item.status === "string"
+    ? { callId: item.callId, status: item.status }
+    : null;
+}
+
+function replaceToolCallStatus(message: WebSocketMessage, status: string): string {
+  const raw = typeof message === "string" ? message : message.toString("utf8");
+  const envelope = JSON.parse(raw) as {
+    message?: { payload?: { event?: { item?: { status?: string } } } };
+  };
+  const item = envelope.message?.payload?.event?.item;
+  if (!item) {
+    throw new Error("Expected a tool-call session message");
+  }
+  item.status = status;
+  return JSON.stringify(envelope);
+}
+
+export async function gateSecondToolCall(page: Page, agentId: string) {
+  let firstCallId: string | null = null;
+  let secondCallId: string | null = null;
+  let secondRunningMessage: WebSocketMessage | null = null;
+  let pauseAfterSecondRunning = false;
+  let releaseSecondRequested = false;
+  let forwardSecondRunning: (() => void) | null = null;
+  let resolveFirstCompleted!: () => void;
+  let resolveSecondRunning!: () => void;
+  const firstCompleted = new Promise<void>((resolve) => {
+    resolveFirstCompleted = resolve;
+  });
+  const secondRunning = new Promise<void>((resolve) => {
+    resolveSecondRunning = resolve;
+  });
+
+  await page.routeWebSocket(daemonWsRoutePattern(), (ws) => {
+    const server = ws.connectToServer();
+    forwardSecondRunning = () => {
+      if (secondRunningMessage) {
+        ws.send(secondRunningMessage);
+        secondRunningMessage = null;
+      }
+    };
+    ws.onMessage((message) => server.send(message));
+    server.onMessage((message) => {
+      if (pauseAfterSecondRunning) {
+        return;
+      }
+
+      const toolCall = getToolCallStatus(message, agentId);
+      if (!toolCall) {
+        ws.send(message);
+        return;
+      }
+
+      if (!firstCallId) {
+        firstCallId = toolCall.callId;
+      }
+      if (toolCall.callId === firstCallId) {
+        ws.send(message);
+        if (toolCall.status === "completed") {
+          resolveFirstCompleted();
+        }
+        return;
+      }
+
+      secondCallId ??= toolCall.callId;
+      if (toolCall.callId === secondCallId) {
+        const transformedMessage =
+          toolCall.status === "completed" ? replaceToolCallStatus(message, "running") : message;
+        secondRunningMessage = transformedMessage;
+        pauseAfterSecondRunning = true;
+        resolveSecondRunning();
+        if (releaseSecondRequested) {
+          forwardSecondRunning?.();
+        }
+        return;
+      }
+
+      ws.send(message);
+    });
+  });
+
+  return {
+    waitForFirstCompleted: () => firstCompleted,
+    waitForSecondRunning: () => secondRunning,
+    releaseSecondRunning() {
+      releaseSecondRequested = true;
+      forwardSecondRunning?.();
+    },
+  };
+}
@@ -1,6 +1,6 @@
 {
  "name": "@getpaseo/app",
-  "version": "0.14.0-beta.1",
+  "version": "0.14.0-beta.2",
  "private": true,
  "main": "index.ts",
  "scripts": {
@@ -702,6 +702,28 @@ it("does not reopen the previous turn while a new run waits for its first row",
  expect(result.tail.map((item) => item.id)).toEqual(["prompt", "reply"]);
 });

+// A sent prompt counts as activity before the daemon opens its turn, so the only known turn is
+// the completed one; it must stay folded until the new turn's rows arrive.
+it("keeps the previous turn folded while a sent prompt waits for its turn to open", () => {
+  const timestamp = new Date();
+  const tail: StreamItem[] = [
+    { kind: "user_message", id: "prompt", text: "Work", timestamp },
+    toolCall("one", "Bash"),
+    { kind: "assistant_message", id: "reply", text: "Done", timestamp },
+  ];
+  for (const item of tail) item.turnId = "completed";
+  const result = createStreamPresentation()({
+    ...presentationOptions,
+    transform: undefined,
+    tail,
+    head: [],
+    display: "collapseTurns",
+    isTurnActive: true,
+    activeTurnId: null,
+  });
+  expect(result.tail.map((item) => item.id)).toEqual(["prompt", "reply"]);
+});
+
 it("groups reasoning with tools unless Expand thinking is enabled, including setting changes", () => {
  const present = createStreamPresentation();
  const timestamp = new Date();
@@ -113,14 +113,16 @@ export function createStreamPresentation() {
    }
    // Live text updates reach the head only, so the folded history is reused until the
    // retained rows, the latest turn's liveness, or the reader's expanded turns change.
-    const isLatestTurnOpen =
-      (input.isTurnActive || projection.head.length > 0) &&
-      !isTurnBoundary(projection.tail.at(-1) ?? null, projection.head[0] ?? null) &&
-      !(
-        input.activeTurnId &&
-        projection.tail.at(-1)?.turnId &&
-        input.activeTurnId !== projection.tail.at(-1)?.turnId
-      );
+    const last = projection.tail.at(-1) ?? null;
+    const first = projection.head[0] ?? null;
+    const activeTurnIsAnother = Boolean(
+      input.activeTurnId && last?.turnId && input.activeTurnId !== last.turnId,
+    );
+    // Without head rows, the latest retained turn is live only while the active run is that
+    // turn. A run that has not opened yet carries no id and belongs to the next turn.
+    const isLatestTurnOpen = first
+      ? !isTurnBoundary(last, first) && !activeTurnIsAnother
+      : input.isTurnActive && (last?.turnId === undefined || input.activeTurnId === last.turnId);
    if (
      !collapsed ||
      collapsedSource !== projection.tail ||
@@ -61,6 +61,11 @@ import { returnToTimelineTail } from "./timeline-tail-navigation";
 import type { DaemonClient } from "@getpaseo/client/internal/daemon-client";
 import { ToolCallDetailsContent } from "@/components/tool-call-details";
 import { QuestionFormCard } from "@/components/question-form-card";
+import {
+  ToolCallExpansionContext,
+  useAgentToolCallExpansion,
+  useExpandedToolCallGroups,
+} from "@/tool-calls/expansion-context";
 import { ToolCallSheetProvider } from "@/components/tool-call-sheet";
 import { createStreamPresentation } from "./presentation";
 import { OverviewToolCallGroupView } from "@/tool-calls/detail-level/overview/view";
@@ -364,9 +369,8 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
    const [expandedInlineToolCallIds, setExpandedInlineToolCallIds] = useState<Set<string>>(
      new Set(),
    );
-    const [expandedToolCallGroupIds, setExpandedToolCallGroupIds] = useState<Set<string>>(
-      new Set(),
-    );
+    const toolCallExpansion = useAgentToolCallExpansion(agentId);
+    const expandedToolCallGroups = useExpandedToolCallGroups(toolCallExpansion);
    const [expandedTurnHostIds, setExpandedTurnHostIds] = useState<ReadonlySet<string>>(new Set());

    // Get serverId (fallback to agent's serverId if not provided)
@@ -431,7 +435,6 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
    useEffect(() => {
      setIsNearBottom(true);
      setExpandedInlineToolCallIds(new Set());
-      setExpandedToolCallGroupIds(new Set());
      setExpandedTurnHostIds(new Set());
    }, [agentId]);

@@ -708,17 +711,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
      return getCollapsedTurn(layoutItem.item.id)?.expanded ? "openedHost" : "none";
    });

-    const setToolCallGroupExpanded = useCallback((groupId: string, expanded: boolean) => {
-      setExpandedToolCallGroupIds((previous) => {
-        const next = new Set(previous);
-        if (expanded) {
-          next.add(groupId);
-        } else {
-          next.delete(groupId);
-        }
-        return next;
-      });
-    }, []);
+    const setToolCallGroupExpanded = toolCallExpansion.setGroupExpanded;

    const renderUserMessageItem = useCallback(
      (layoutItem: StreamLayoutItem, item: Extract<StreamItem, { kind: "user_message" }>) => {
@@ -815,7 +808,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
      (
        item: Extract<StreamItem, { kind: "tool_call" }>,
        isLastInSequence: boolean,
-        maxDetailHeight?: number,
+        options: { maxDetailHeight?: number; standalone?: boolean } = {},
      ) => {
        const { payload } = item;

@@ -847,7 +840,8 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
              agentMessage={data.agentMessage}
              isLastInSequence={isLastInSequence}
              onOpenFilePath={handleToolCallOpenFile}
-              maxDetailHeight={maxDetailHeight}
+              standalone={options.standalone}
+              maxDetailHeight={options.maxDetailHeight}
            />
          );
        }
@@ -863,7 +857,8 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
            status={data.status}
            isLastInSequence={isLastInSequence}
            onOpenFilePath={handleToolCallOpenFile}
-            maxDetailHeight={maxDetailHeight}
+            standalone={options.standalone}
+            maxDetailHeight={options.maxDetailHeight}
          />
        );
      },
@@ -886,7 +881,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
            ? renderThoughtItem(layoutItem, item)
            : renderSingleToolCallItem(item, layoutItem.isLastInToolSequence);
        }
-        const expanded = expandedToolCallGroupIds.has(group.run.id);
+        const expanded = expandedToolCallGroups.has(group.run.id);
        return (
          <OverviewToolCallGroupView
            group={group}
@@ -898,20 +893,22 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
              ? group.run.calls.map((call, index) => (
                  <React.Fragment key={call.id}>
                    {call.kind === "thought" ? (
+                      // Reasoning is grouped only while Expand thinking is off, so an opened
+                      // group shows each thought as a closed row like any other call.
                      <ThoughtSlot
                        itemId={call.id}
                        text={call.text}
                        status={call.status}
                        isLastInSequence={index === group.run.calls.length - 1}
-                        defaultExpanded
+                        defaultExpanded={false}
+                        standalone={false}
                        onInlineDetailsExpandedChangeByItemId={setInlineDetailsExpanded}
                      />
                    ) : (
-                      renderSingleToolCallItem(
-                        call,
-                        index === group.run.calls.length - 1,
-                        GROUPED_TOOL_CALL_DETAIL_MAX_HEIGHT,
-                      )
+                      renderSingleToolCallItem(call, index === group.run.calls.length - 1, {
+                        maxDetailHeight: GROUPED_TOOL_CALL_DETAIL_MAX_HEIGHT,
+                        standalone: false,
+                      })
                    )}
                  </React.Fragment>
                ))
@@ -920,7 +917,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
        );
      },
      [
-        expandedToolCallGroupIds,
+        expandedToolCallGroups,
        renderThoughtItem,
        setInlineDetailsExpanded,
        getToolCallGroup,
@@ -1172,15 +1169,18 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
      () => ({
        contentById: presentation.historyGroupUpdatesByHostId,
        displayStateById: {
+          // An opened lone call also marks its future group open; that row stays unrevised
+          // until a group actually forms there.
          has: (id: string) =>
-            expandedToolCallGroupIds.has(id) ||
+            (expandedToolCallGroups.has(id) && getToolCallGroup(id) !== undefined) ||
            expandedTurnHostIds.has(id) ||
            nestedItemIds.has(id),
        },
        globalDisplayState: isMobile,
      }),
      [
-        expandedToolCallGroupIds,
+        expandedToolCallGroups,
+        getToolCallGroup,
        expandedTurnHostIds,
        isMobile,
        nestedItemIds,
@@ -1205,30 +1205,32 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
        <ToolCallSheetProvider>
          <AssistantSelectionCopySurface style={stylesheet.container}>
            <MessageOuterSpacingProvider disableOuterSpacing>
-              {streamRenderStrategy.render({
-                readingRowReplacements: presentation.readingRowReplacements,
-                agentId,
-                segments: renderModel.segments,
-                historyRowRevision,
-                liveHeadRowRevision: expandedToolCallGroupIds,
-                boundary,
-                renderers,
-                listEmptyComponent,
-                viewportRef,
-                routeBottomAnchorRequest,
-                isAuthoritativeHistoryReady,
-                onNearBottomChange: setIsNearBottom,
-                onReadingPositionChange: handleReadingPositionChange,
-                onNearHistoryStart: loadOlder,
-                isLoadingOlderHistory: isLoadingOlder,
-                hasOlderHistory: hasOlder,
-                olderHistoryProgressKey: progressKey,
-                scrollEnabled: streamScrollEnabled,
-                listStyle: stylesheet.list,
-                baseListContentContainerStyle: stylesheet.listContentContainer,
-                forwardListContentContainerStyle: stylesheet.forwardListContentContainer,
-                contentMaxWidth,
-              })}
+              <ToolCallExpansionContext.Provider value={toolCallExpansion}>
+                {streamRenderStrategy.render({
+                  readingRowReplacements: presentation.readingRowReplacements,
+                  agentId,
+                  segments: renderModel.segments,
+                  historyRowRevision,
+                  liveHeadRowRevision: expandedToolCallGroups,
+                  boundary,
+                  renderers,
+                  listEmptyComponent,
+                  viewportRef,
+                  routeBottomAnchorRequest,
+                  isAuthoritativeHistoryReady,
+                  onNearBottomChange: setIsNearBottom,
+                  onReadingPositionChange: handleReadingPositionChange,
+                  onNearHistoryStart: loadOlder,
+                  isLoadingOlderHistory: isLoadingOlder,
+                  hasOlderHistory: hasOlder,
+                  olderHistoryProgressKey: progressKey,
+                  scrollEnabled: streamScrollEnabled,
+                  listStyle: stylesheet.list,
+                  baseListContentContainerStyle: stylesheet.listContentContainer,
+                  forwardListContentContainerStyle: stylesheet.forwardListContentContainer,
+                  contentMaxWidth,
+                })}
+              </ToolCallExpansionContext.Provider>
            </MessageOuterSpacingProvider>
            <ChatOutlineRail
              prompts={chatOutline.prompts}
@@ -1401,6 +1403,7 @@ interface ThoughtSlotProps {
  status: Extract<StreamItem, { kind: "thought" }>["status"];
  isLastInSequence: boolean;
  defaultExpanded: boolean;
+  standalone?: boolean;
 }

 // Reasoning text is paced the same way assistant text is; see @/hooks/use-revealed-text.
@@ -1411,6 +1414,7 @@ function ThoughtSlot({
  status,
  isLastInSequence,
  defaultExpanded,
+  standalone,
 }: ThoughtSlotProps) {
  const revealedText = useRevealedText(text, status === "ready" ? "complete" : "streaming");
  return (
@@ -1422,6 +1426,7 @@ function ThoughtSlot({
      status={status === "ready" ? "completed" : "executing"}
      isLastInSequence={isLastInSequence}
      defaultExpanded={defaultExpanded}
+      standalone={standalone}
      forceInline={defaultExpanded}
    />
  );
@@ -1436,7 +1441,9 @@ function ToolCallSlot({
    (expanded: boolean) => onInlineDetailsExpandedChangeByItemId(itemId, expanded),
    [onInlineDetailsExpandedChangeByItemId, itemId],
  );
-  return <ToolCall {...rest} onInlineDetailsExpandedChange={handleExpandedChange} />;
+  return (
+    <ToolCall {...rest} itemId={itemId} onInlineDetailsExpandedChange={handleExpandedChange} />
+  );
 }

 const ThemedLoadingSpinner = withUnistyles(LoadingSpinner);
@@ -0,0 +1,33 @@
+/**
+ * @vitest-environment jsdom
+ */
+import React from "react";
+import { render, screen } from "@testing-library/react";
+import { Text } from "react-native";
+import { SafeAreaInsetsContext, useSafeAreaInsets } from "react-native-safe-area-context";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { SheetBottomInset } from "./adaptive-modal-sheet";
+
+beforeEach(() => vi.stubGlobal("React", React));
+
+const SCREEN_INSETS = { top: 24, right: 0, bottom: 34, left: 0 };
+
+function BottomInsetProbe() {
+  return <Text testID="content-bottom-inset">{String(useSafeAreaInsets().bottom)}</Text>;
+}
+
+describe("SheetBottomInset", () => {
+  it("pads the bottom inset once and leaves none for its content", () => {
+    render(
+      <SafeAreaInsetsContext.Provider value={SCREEN_INSETS}>
+        <SheetBottomInset testID="sheet-body">
+          <BottomInsetProbe />
+        </SheetBottomInset>
+      </SafeAreaInsetsContext.Provider>,
+    );
+
+    expect(screen.getByTestId("sheet-body").style.paddingBottom).toBe("34px");
+    // Content that pads the inset itself, like the composer dock, must not pad it again.
+    expect(screen.getByTestId("content-bottom-inset").textContent).toBe("0");
+  });
+});
@@ -3,7 +3,7 @@ import type { ComponentProps, ReactNode } from "react";
 import { createPortal } from "react-dom";
 import { useTranslation } from "react-i18next";
 import { Keyboard, Pressable, Text, View } from "react-native";
-import type { DimensionValue, StyleProp, ViewStyle } from "react-native";
+import type { DimensionValue, StyleProp, ViewProps, ViewStyle } from "react-native";
 import { StyleSheet, useUnistyles, withUnistyles } from "react-native-unistyles";
 import { useIsCompactFormFactor } from "@/constants/layout";
 import {
@@ -12,7 +12,12 @@ import {
  useGlobalWebOverlayLayer,
  useWebOverlayRegistration,
 } from "../lib/overlay-root";
-import { BottomSheetHandle, type BottomSheetBackgroundProps } from "@gorhom/bottom-sheet";
+import {
+  BottomSheetHandle,
+  useBottomSheetGestureHandlers,
+  type BottomSheetBackgroundProps,
+} from "@gorhom/bottom-sheet";
+import { Gesture, GestureDetector } from "react-native-gesture-handler";
 import Animated from "react-native-reanimated";
 import { ArrowLeft, Search, X, type LucideIcon } from "lucide-react-native";
 import {
@@ -25,7 +30,7 @@ import { getCompactSheetSafeAreaPadding } from "@/components/adaptive-modal-shee
 import { ScrollView } from "@/components/ui/scroll-view";
 import { isWeb } from "@/constants/platform";
 import { useKeyboardVisibility } from "@/hooks/use-keyboard-visibility";
-import { useSafeAreaInsets } from "react-native-safe-area-context";
+import { SafeAreaInsetsContext, useSafeAreaInsets } from "react-native-safe-area-context";
 import { AdaptiveTextInput } from "@/components/adaptive-text-input";
 export { AdaptiveTextInput, type AdaptiveTextInputProps } from "@/components/adaptive-text-input";

@@ -40,6 +45,9 @@ export const SHEET_HORIZONTAL_PADDING_SCALE = 6;
 // glyph should line up with the X must reach the same rail.
 export const SHEET_HEADER_CLOSE_PADDING_SCALE = 2;

+/** The one height a sheet takes when it shows a whole pane rather than sizing to its content. */
+export const FULL_SHEET_SNAP_POINTS = ["92%"];
+
 export interface SheetHeaderSearch {
  onChange: (value: string) => void;
  onFocus?: () => void;
@@ -244,32 +252,55 @@ const ThemedBottomSheetHandle = withUnistyles(BottomSheetHandle, (theme) => ({
  indicatorStyle: { backgroundColor: theme.colors.palette.zinc[600] },
 }));

-const HANDLE_WITH_CONTENT_STYLE = { paddingHorizontal: 0, paddingBottom: 0 };
-
-/**
- * The compact sheet's drag handle: Gorhom's `handleComponent` for every bottom sheet. Children
- * join the handle, so a header passed here drags the sheet like the indicator does. That is how a
- * sheet whose content scrolls on its own keeps its header draggable without content panning.
- */
+/** The compact sheet's drag handle: Gorhom's `handleComponent` for every bottom sheet. */
 export function SheetHandle({
-  children,
  // Gorhom passes `indicatorStyle={undefined}`, which would override the themed indicator.
  indicatorStyle: _indicatorStyle,
  ...props
 }: ComponentProps<typeof BottomSheetHandle>) {
-  if (!children) return <ThemedBottomSheetHandle {...props} />;
-  // The children carry their own semantics; the handle's slider role would swallow them on web.
+  return <ThemedBottomSheetHandle {...props} />;
+}
+
+/**
+ * Content that drags the sheet the way its handle does. A sheet whose body scrolls on its own
+ * turns content panning off and wraps its header in this, so the header still pulls it down.
+ * Render it inside the sheet's content.
+ */
+export function SheetDragArea({ children }: { children: ReactNode }) {
+  const { handlePanGestureHandler } = useBottomSheetGestureHandlers();
+  const gesture = useMemo(
+    () =>
+      Gesture.Pan()
+        .shouldCancelWhenOutside(false)
+        .runOnJS(false)
+        .onStart(handlePanGestureHandler.handleOnStart)
+        .onChange(handlePanGestureHandler.handleOnChange)
+        .onEnd(handlePanGestureHandler.handleOnEnd)
+        .onFinalize(handlePanGestureHandler.handleOnFinalize),
+    [handlePanGestureHandler],
+  );
  return (
-    <ThemedBottomSheetHandle
-      {...props}
-      style={HANDLE_WITH_CONTENT_STYLE}
-      accessible={false}
-      accessibilityRole={null}
-      accessibilityLabel={null}
-      accessibilityHint={null}
-    >
-      {children}
-    </ThemedBottomSheetHandle>
+    <GestureDetector gesture={gesture}>
+      <View>{children}</View>
+    </GestureDetector>
+  );
+}
+
+/**
+ * A compact sheet's content area that reaches the bottom of the screen. It owns the system
+ * navigation inset: it pads it once and tells its content none is left, so content that pads the
+ * inset itself, like the composer dock, sits the same in a sheet as in a tab.
+ */
+export function SheetBottomInset({ style, children, ...props }: ViewProps) {
+  const insets = useSafeAreaInsets();
+  const contentInsets = useMemo(() => ({ ...insets, bottom: 0 }), [insets]);
+  const insetStyle = useMemo(() => [style, { paddingBottom: insets.bottom }], [style, insets]);
+  return (
+    <View {...props} style={insetStyle}>
+      <SafeAreaInsetsContext.Provider value={contentInsets}>
+        {children}
+      </SafeAreaInsetsContext.Provider>
+    </View>
  );
 }

@@ -488,6 +519,76 @@ export interface AdaptiveModalSheetProps {
  contextBridge?: ContextBridge | null;
 }

+/**
+ * The compact sheet's body. It renders on the far side of the sheet's portal so it reads the
+ * screen's bottom inset, not the one left where the sheet was opened: inside a sheet tab, none is.
+ */
+function CompactSheetBody({
+  header,
+  onClose,
+  testID,
+  footer,
+  isKeyboardVisible,
+  scrollable,
+  bodyStyle,
+  contentStyle,
+  children,
+}: {
+  header: SheetHeader;
+  onClose: () => void;
+  testID?: string;
+  footer: ReactNode;
+  isKeyboardVisible: boolean;
+  scrollable: boolean;
+  bodyStyle?: StyleProp<ViewStyle>;
+  contentStyle?: StyleProp<ViewStyle>;
+  children: ReactNode;
+}) {
+  const insets = useSafeAreaInsets();
+  const { contentPaddingBottom = 0, footerPaddingBottom = 0 } = getCompactSheetSafeAreaPadding({
+    isCompact: true,
+    isKeyboardVisible,
+    hasFooter: Boolean(footer),
+    safeAreaBottom: insets.bottom,
+  });
+  // Safe-area clearance is a separate layer: it must not replace the caller's
+  // padding (including an explicit zero), and the footer owns it when present.
+  const bodyClearanceStyle = { paddingBottom: contentPaddingBottom };
+  const footerClearanceStyle = useMemo(
+    () => ({ paddingBottom: footerPaddingBottom }),
+    [footerPaddingBottom],
+  );
+  const footerView = useMemo(
+    () => (footer ? <View style={footerClearanceStyle}>{footer}</View> : null),
+    [footer, footerClearanceStyle],
+  );
+  return (
+    <SheetVisibleFrame footer={footerView}>
+      <SheetHeaderView header={header} onClose={onClose} testID={testID} />
+      <View style={[styles.compactStaticContent, bodyStyle]}>
+        {scrollable ? (
+          <ScrollView
+            style={styles.bottomSheetVisibleScroll}
+            contentContainerStyle={SCROLL_CONTENT_GROW}
+            keyboardShouldPersistTaps="handled"
+            showsVerticalScrollIndicator={false}
+          >
+            <View style={[styles.contentGrow, bodyClearanceStyle]}>
+              <SheetContent style={[styles.contentGrow, contentStyle]}>{children}</SheetContent>
+            </View>
+          </ScrollView>
+        ) : (
+          <View style={[styles.compactStaticContent, bodyClearanceStyle]}>
+            <SheetContent style={[styles.compactStaticContent, contentStyle]}>
+              {children}
+            </SheetContent>
+          </View>
+        )}
+      </View>
+    </SheetVisibleFrame>
+  );
+}
+
 export function AdaptiveModalSheet({
  header,
  visible,
@@ -508,34 +609,11 @@ export function AdaptiveModalSheet({
 }: AdaptiveModalSheetProps) {
  const { t } = useTranslation();
  const isMobile = useIsCompactFormFactor();
-  const insets = useSafeAreaInsets();
  const isKeyboardVisible = useKeyboardVisibility(visible);
  const resolvedSnapPoints = useMemo(() => snapPoints ?? ["65%", "90%"], [snapPoints]);
-  const compactSafeAreaPadding = useMemo(
-    () =>
-      getCompactSheetSafeAreaPadding({
-        isCompact: isMobile,
-        isKeyboardVisible,
-        hasFooter: Boolean(footer),
-        safeAreaBottom: insets.bottom,
-      }),
-    [footer, insets.bottom, isKeyboardVisible, isMobile],
-  );
-  // Safe-area clearance is a separate layer: it must not replace the caller's
-  // padding (including an explicit zero), and the footer owns it when present.
-  const bodyClearanceStyle = { paddingBottom: compactSafeAreaPadding.contentPaddingBottom ?? 0 };
-  const footerClearanceStyle = useMemo(
-    () => ({ paddingBottom: compactSafeAreaPadding.footerPaddingBottom ?? 0 }),
-    [compactSafeAreaPadding.footerPaddingBottom],
-  );
  const footerView = useMemo(
-    () =>
-      footer ? (
-        <View style={footerClearanceStyle}>
-          <View style={[styles.footer, footerContainerStyle]}>{footer}</View>
-        </View>
-      ) : null,
-    [footer, footerClearanceStyle, footerContainerStyle],
+    () => (footer ? <View style={[styles.footer, footerContainerStyle]}>{footer}</View> : null),
+    [footer, footerContainerStyle],
  );
  useEffect(() => {
    if (!isWeb && visible) {
@@ -614,32 +692,6 @@ export function AdaptiveModalSheet({
  }, [visible, isMobile, onDismiss, shouldRenderWeb]);

  if (isMobile) {
-    const sheetContent = (
-      <>
-        <SheetHeaderView header={header} onClose={onClose} testID={testID} />
-        <View style={[styles.compactStaticContent, bodyStyle]}>
-          {scrollable ? (
-            <ScrollView
-              style={styles.bottomSheetVisibleScroll}
-              contentContainerStyle={SCROLL_CONTENT_GROW}
-              keyboardShouldPersistTaps="handled"
-              showsVerticalScrollIndicator={false}
-            >
-              <View style={[styles.contentGrow, bodyClearanceStyle]}>
-                <SheetContent style={[styles.contentGrow, contentStyle]}>{children}</SheetContent>
-              </View>
-            </ScrollView>
-          ) : (
-            <View style={[styles.compactStaticContent, bodyClearanceStyle]}>
-              <SheetContent style={[styles.compactStaticContent, contentStyle]}>
-                {children}
-              </SheetContent>
-            </View>
-          )}
-        </View>
-      </>
-    );
-
    return (
      <IsolatedBottomSheetModal
        ref={sheetRef}
@@ -658,7 +710,18 @@ export function AdaptiveModalSheet({
        accessible={false}
        presentation={presentation}
      >
-        <SheetVisibleFrame footer={footerView}>{sheetContent}</SheetVisibleFrame>
+        <CompactSheetBody
+          header={header}
+          onClose={onClose}
+          testID={testID}
+          footer={footerView}
+          isKeyboardVisible={isKeyboardVisible}
+          scrollable={scrollable}
+          bodyStyle={bodyStyle}
+          contentStyle={contentStyle}
+        >
+          {children}
+        </CompactSheetBody>
      </IsolatedBottomSheetModal>
    );
  }
@@ -72,6 +72,7 @@ vi.mock("react-i18next", () => ({
 }));

 vi.mock("react-native-safe-area-context", () => ({
+  SafeAreaProvider: ({ children }: { children?: React.ReactNode }) => children,
  useSafeAreaInsets: () => ({ top: 0, right: 0, bottom: 0, left: 0 }),
 }));

@@ -1,8 +1,8 @@
-import { useCallback, useEffect, useMemo, useState } from "react";
+import { type ReactNode, useCallback, useEffect, useMemo, useState } from "react";
 import { Modal, Pressable, Text, View } from "react-native";
 import { GestureHandlerRootView } from "react-native-gesture-handler";
 import { StyleSheet } from "react-native-unistyles";
-import { useSafeAreaInsets } from "react-native-safe-area-context";
+import { SafeAreaProvider, useSafeAreaInsets } from "react-native-safe-area-context";
 import { X } from "lucide-react-native";
 import { useTranslation } from "react-i18next";
 import type { AttachmentMetadata } from "@/attachments/types";
@@ -28,7 +28,6 @@ const LIGHTBOX_FIT = { padding: SPACING[4], maxWidth: 960, maxHeight: 640 };

 export function AttachmentLightbox({ source, onClose }: AttachmentLightboxProps) {
  const { t } = useTranslation();
-  const insets = useSafeAreaInsets();
  const metadata = source?.type === "attachment" ? source.metadata : null;
  const attachmentUrl = useAttachmentPreviewUrl(metadata);
  const url = source?.type === "uri" ? source.uri : attachmentUrl;
@@ -56,18 +55,6 @@ export function AttachmentLightbox({ source, onClose }: AttachmentLightboxProps)
    onKeyDown: handleWebOverlayKeyDown,
  });

-  const contentLayerStyle = useMemo(
-    () => [
-      styles.contentLayer,
-      {
-        paddingTop: insets.top,
-        paddingRight: insets.right,
-        paddingBottom: insets.bottom,
-        paddingLeft: insets.left,
-      },
-    ],
-    [insets.bottom, insets.left, insets.right, insets.top],
-  );
  const actions = useMemo(
    () => [
      {
@@ -91,17 +78,19 @@ export function AttachmentLightbox({ source, onClose }: AttachmentLightboxProps)
  return (
    <Modal transparent animationType="fade" statusBarTranslucent visible onRequestClose={onClose}>
      <ModalRoot style={styles.root}>
-        <WindowChromeRootRegion corners="both">
-          <View ref={setWebOverlayScope} style={styles.root}>
-            <Pressable
-              testID="attachment-lightbox-backdrop"
-              accessibilityRole="button"
-              accessibilityLabel={t("message.attachments.dismissImage")}
-              onPress={onClose}
-              style={styles.backdrop}
-            />
-            <View pointerEvents="box-none" style={contentLayerStyle}>
-              <View pointerEvents="box-none" style={styles.imageArea}>
+        {/* The modal is its own window: its insets are the window's, not the ones left where the
+            image was opened (inside a sheet tab, the bottom one is already spent). */}
+        <SafeAreaProvider>
+          <WindowChromeRootRegion corners="both">
+            <View ref={setWebOverlayScope} style={styles.root}>
+              <Pressable
+                testID="attachment-lightbox-backdrop"
+                accessibilityRole="button"
+                accessibilityLabel={t("message.attachments.dismissImage")}
+                onPress={onClose}
+                style={styles.backdrop}
+              />
+              <LightboxImageArea>
                {hasError ? (
                  <Text style={styles.errorText}>{t("message.attachments.imageLoadFailed")}</Text>
                ) : (
@@ -117,15 +106,38 @@ export function AttachmentLightbox({ source, onClose }: AttachmentLightboxProps)
                    uri={url}
                  />
                )}
-              </View>
+              </LightboxImageArea>
            </View>
-          </View>
-        </WindowChromeRootRegion>
+          </WindowChromeRootRegion>
+        </SafeAreaProvider>
      </ModalRoot>
    </Modal>
  );
 }

+function LightboxImageArea({ children }: { children: ReactNode }) {
+  const insets = useSafeAreaInsets();
+  const style = useMemo(
+    () => [
+      styles.contentLayer,
+      {
+        paddingTop: insets.top,
+        paddingRight: insets.right,
+        paddingBottom: insets.bottom,
+        paddingLeft: insets.left,
+      },
+    ],
+    [insets.bottom, insets.left, insets.right, insets.top],
+  );
+  return (
+    <View pointerEvents="box-none" style={style}>
+      <View pointerEvents="box-none" style={styles.imageArea}>
+        {children}
+      </View>
+    </View>
+  );
+}
+
 const styles = StyleSheet.create((theme) => ({
  root: {
    flex: 1,
@@ -27,6 +27,7 @@ import { writeMarkdownToRichClipboard } from "@/utils/rich-clipboard";
 import { getDefaultMarkdownClipboardEnvironment } from "@/utils/rich-clipboard-default-environment";
 import { formatDuration, formatMessageTimestamp } from "@/utils/time";
 import { resolveToolCallIcon } from "@/utils/tool-call-icon";
+import { useToolCallExpanded } from "@/tool-calls/expansion-context";
 import { useTargetAgentTitle } from "@/tool-calls/use-target-agent-title";
 import type { DaemonClient } from "@getpaseo/client/internal/daemon-client";
 import type { AgentMessage } from "@getpaseo/protocol/agent-message";
@@ -2241,6 +2242,9 @@ interface ToolCallProps {
  defaultExpanded?: boolean;
  forceInline?: boolean;
  maxDetailHeight?: number;
+  itemId: string;
+  /** Shown as its own row rather than inside a tool call group. */
+  standalone?: boolean;
 }

 export const ToolCall = memo(function ToolCall({
@@ -2262,9 +2266,15 @@ export const ToolCall = memo(function ToolCall({
  defaultExpanded,
  forceInline = false,
  maxDetailHeight = 400,
+  itemId,
+  standalone = true,
 }: ToolCallProps) {
  const { openToolCall } = useToolCallSheet();
-  const [isExpanded, setIsExpanded] = useState(defaultExpanded ?? false);
+  const { expanded: isExpanded, toggle: toggleExpanded } = useToolCallExpanded({
+    callId: itemId,
+    defaultExpanded: defaultExpanded ?? false,
+    standalone,
+  });

  const isMobile = useIsCompactFormFactor();
  const shouldRenderInline = !isMobile || forceInline;
@@ -2319,10 +2329,11 @@ export const ToolCall = memo(function ToolCall({
        showLoadingSkeleton: presentation.isLoadingDetails,
      });
    } else {
-      setIsExpanded((prev) => !prev);
+      toggleExpanded();
    }
  }, [
    shouldRenderInline,
+    toggleExpanded,
    openToolCall,
    toolName,
    presentation.detail,
@@ -2428,5 +2439,7 @@ function areToolCallPropsEqual(previous: ToolCallProps, next: ToolCallProps) {
  if (previous.defaultExpanded !== next.defaultExpanded) return false;
  if (previous.forceInline !== next.forceInline) return false;
  if (previous.maxDetailHeight !== next.maxDetailHeight) return false;
+  if (previous.itemId !== next.itemId) return false;
+  if (previous.standalone !== next.standalone) return false;
  return true;
 }
@@ -1692,7 +1692,7 @@ const styles = StyleSheet.create((theme) => ({
    opacity: 0,
  },
  emptyState: {
-    paddingVertical: theme.spacing[4],
+    padding: theme.spacing[4],
    alignItems: "center",
    gap: theme.spacing[2],
  },
@@ -168,6 +168,7 @@ export function Button({
  trailing,
  style,
  textStyle,
+  numberOfLines,
  disabled,
  loading = false,
  accessibilityRole,
@@ -182,6 +183,7 @@ export function Button({
    trailing?: ReactNode;
    style?: StyleProp<ViewStyle>;
    textStyle?: StyleProp<TextStyle>;
+    numberOfLines?: number;
    loading?: boolean;
  }
 >) {
@@ -277,7 +279,11 @@ export function Button({
        iconSize={buttonIconSize[size]}
        uniProps={resolveIconMapping()}
      />
-      {children != null ? <Text style={resolvedTextStyle}>{children}</Text> : null}
+      {children != null ? (
+        <Text numberOfLines={numberOfLines} style={resolvedTextStyle}>
+          {children}
+        </Text>
+      ) : null}
      {trailing}
    </Pressable>
  );
@@ -938,7 +938,6 @@ interface MobileBodyProps {
  handleSelect: (id: string) => void;
  renderOption: RenderOptionFn | undefined;
  children: ReactNode;
-  safeAreaBottom: number;
 }

 function MobileComboboxBody(props: MobileBodyProps): ReactElement | null {
@@ -961,21 +960,6 @@ function MobileComboboxSheet(props: MobileBodyProps): ReactElement {
    () => [styles.comboboxTitle, { color: props.titleColor }],
    [props.titleColor],
  );
-  const { footer, safeAreaBottom } = props;
-  const frameStyle = useMemo(
-    () => [styles.mobileSheetFrame, { paddingBottom: footer ? 0 : safeAreaBottom }],
-    [footer, safeAreaBottom],
-  );
-  const footerStyle = useMemo(
-    () => [styles.footer, { paddingBottom: safeAreaBottom }],
-    [safeAreaBottom],
-  );
-
-  const footerView = useMemo(
-    () => (footer ? <View style={footerStyle}>{footer}</View> : undefined),
-    [footer, footerStyle],
-  );
-
  const body = props.hasChildren ? (
    props.children
  ) : (
@@ -1006,51 +990,74 @@ function MobileComboboxSheet(props: MobileBodyProps): ReactElement {
      keyboardBlurBehavior="none"
      presentation={props.presentation}
    >
-      <SheetVisibleFrame footer={footerView}>
-        <View style={frameStyle}>
-          {props.header ? (
-            <SheetHeaderView header={props.header} onClose={props.onClose} />
-          ) : (
-            <>
-              <View style={styles.bottomSheetHeader}>
-                <Text key={props.titleColor} style={comboboxTitleStyle}>
-                  {props.title}
-                </Text>
-              </View>
-              {props.stickyHeader}
-              {!props.hasChildren && props.searchable ? (
-                <SearchInput
-                  placeholder={props.searchPlaceholder}
-                  onChangeText={props.setSearchQueryWithCallback}
-                  onSubmitEditing={props.handleSubmitSearch}
-                  autoFocus={false}
-                  useBottomSheetInput
-                  resetKey={props.searchResetKey}
-                />
-              ) : null}
-            </>
-          )}
-          {props.hasChildren && !props.mobileChildrenScrollEnabled ? (
-            body
-          ) : (
-            <BottomSheetScrollView
-              style={styles.mobileSheetBody}
-              contentContainerStyle={[
-                styles.comboboxScrollContent,
-                props.mobileChildrenContentContainerStyle,
-              ]}
-              keyboardShouldPersistTaps="handled"
-              showsVerticalScrollIndicator={false}
-            >
-              {body}
-            </BottomSheetScrollView>
-          )}
-        </View>
-      </SheetVisibleFrame>
+      <ComboboxSheetFrame footer={props.footer}>
+        {props.header ? (
+          <SheetHeaderView header={props.header} onClose={props.onClose} />
+        ) : (
+          <>
+            <View style={styles.bottomSheetHeader}>
+              <Text key={props.titleColor} style={comboboxTitleStyle}>
+                {props.title}
+              </Text>
+            </View>
+            {props.stickyHeader}
+            {!props.hasChildren && props.searchable ? (
+              <SearchInput
+                placeholder={props.searchPlaceholder}
+                onChangeText={props.setSearchQueryWithCallback}
+                onSubmitEditing={props.handleSubmitSearch}
+                autoFocus={false}
+                useBottomSheetInput
+                resetKey={props.searchResetKey}
+              />
+            ) : null}
+          </>
+        )}
+        {props.hasChildren && !props.mobileChildrenScrollEnabled ? (
+          body
+        ) : (
+          <BottomSheetScrollView
+            style={styles.mobileSheetBody}
+            contentContainerStyle={[
+              styles.comboboxScrollContent,
+              props.mobileChildrenContentContainerStyle,
+            ]}
+            keyboardShouldPersistTaps="handled"
+            showsVerticalScrollIndicator={false}
+          >
+            {body}
+          </BottomSheetScrollView>
+        )}
+      </ComboboxSheetFrame>
    </IsolatedBottomSheetModal>
  );
 }

+/**
+ * Rendered on the far side of the sheet's portal so it clears the screen's bottom inset, not the
+ * one left where the combobox was opened: inside a sheet tab, none is.
+ */
+function ComboboxSheetFrame({ footer, children }: { footer?: ReactNode; children: ReactNode }) {
+  const { bottom: safeAreaBottom } = useSafeAreaInsets();
+  const frameStyle = useMemo(
+    () => [styles.mobileSheetFrame, { paddingBottom: footer ? 0 : safeAreaBottom }],
+    [footer, safeAreaBottom],
+  );
+  const footerStyle = useMemo(
+    () => [styles.footer, { paddingBottom: safeAreaBottom }],
+    [safeAreaBottom],
+  );
+  const footerView = useMemo(
+    () => (footer ? <View style={footerStyle}>{footer}</View> : undefined),
+    [footer, footerStyle],
+  );
+  return (
+    <SheetVisibleFrame footer={footerView}>
+      <View style={frameStyle}>{children}</View>
+    </SheetVisibleFrame>
+  );
+}
+
 interface DesktopBodyProps {
  overlayLayer: number;
  isOpen: boolean;
@@ -1327,7 +1334,6 @@ export function Combobox({
  const isMobile = useIsCompactFormFactor();
  const active = useRetainedPanelActive();
  const floatingLayer = useOverlayLayer("floating");
-  const safeAreaInsets = useSafeAreaInsets();
  const titleColor = theme.colors.foreground;
  const effectiveOptionsPosition = resolveEffectiveOptionsPosition(isMobile, optionsPosition);
  const isDesktopAboveSearch = resolveIsDesktopAboveSearch(isMobile, effectiveOptionsPosition);
@@ -1608,7 +1614,6 @@ export function Combobox({
        emptyText={resolvedEmptyText}
        handleSelect={handleSelect}
        renderOption={renderOption}
-        safeAreaBottom={safeAreaInsets.bottom}
      >
        {children}
      </MobileComboboxBody>
@@ -123,19 +123,25 @@ export function useIsolatedBottomSheetVisibility({
  visible,
  isEnabled,
  onClose,
+  onBack,
 }: {
  visible: boolean;
  isEnabled?: boolean;
  onClose: () => void;
+  /** Offered Android Back before it closes the sheet; returns true when it handled the press. */
+  onBack?: () => boolean;
 }) {
  const onCloseRef = useRef(onClose);
  onCloseRef.current = onClose;
+  const onBackRef = useRef(onBack);
+  onBackRef.current = onBack;

  const tracker = useMemo(
    () =>
      createBottomSheetVisibilityTracker({
        onClose: () => onCloseRef.current(),
        backPress: systemBackPress,
+        onBack: () => onBackRef.current?.() ?? false,
      }),
    [],
  );
@@ -204,6 +204,31 @@ describe("bottom sheet visibility tracker", () => {
    expect(context.sheet.events).toEqual([{ type: "present" }, { type: "dismiss" }]);
  });

+  it("lets the sheet step back through its own pages before Back dismisses it", () => {
+    const sheet = new FakeBottomSheet();
+    const backPress = new FakeBackPress();
+    let openPages = 1;
+    const tracker = createBottomSheetVisibilityTracker({
+      onClose: () => {},
+      onBack: () => {
+        if (openPages === 0) return false;
+        openPages -= 1;
+        return true;
+      },
+      backPress,
+    });
+    tracker.attachController(sheet);
+    tracker.syncDesired({ visible: true });
+    tracker.handleSheetIndexChange(0);
+
+    expect(backPress.press()).toBe(true);
+    expect(openPages).toBe(0);
+    expect(sheet.events).toEqual([{ type: "present" }]);
+
+    expect(backPress.press()).toBe(true);
+    expect(sheet.events).toEqual([{ type: "present" }, { type: "dismiss" }]);
+  });
+
  it("leaves Back to the navigator before the sheet is on screen and after it closes", () => {
    const context = setup();
    context.tracker.attachController(context.sheet);
@@ -36,6 +36,11 @@ type BottomSheetPhase = "closed" | "presenting" | "presented" | "dismissing";
 export function createBottomSheetVisibilityTracker(opts: {
  onClose: () => void;
  backPress?: BackPressSource;
+  /**
+   * Offered the Back press before the sheet takes it as a close. Returns true when it handled
+   * the press itself, such as stepping back a page inside the sheet.
+   */
+  onBack?: () => boolean;
 }): BottomSheetVisibilityTracker {
  let controller: BottomSheetController | null = null;
  let visible = false;
@@ -60,6 +65,7 @@ export function createBottomSheetVisibilityTracker(opts: {
    }
    releaseBackPress =
      opts.backPress?.subscribe(() => {
+        if (opts.onBack?.()) return true;
        dismiss();
        return true;
      }) ?? null;
@@ -12,6 +12,8 @@ export { MenuRoot, MenuTrigger, type MenuTriggerProps, type MenuTriggerState } f
 export {
  MenuSurface,
  useMenuSurface,
+  type MenuFillPageDefinition,
+  type MenuListPageDefinition,
  type MenuPageDefinition,
  type MenuSurfaceProps,
 } from "./menu-surface";
@@ -61,3 +61,38 @@ describe("useMenuState selectItem elsewhere", () => {
    expect(onSelect).toHaveBeenCalledTimes(1);
  });
 });
+
+describe("useMenuState pages", () => {
+  it("pops the open page on Back and leaves Back at the root to the surface", () => {
+    const { result } = renderHook(() => useMenuState({ defaultOpen: true }));
+    act(() => result.current.openSub({ id: "row", depth: 0 }));
+
+    let handled = false;
+    act(() => {
+      handled = result.current.goBack();
+    });
+    expect(handled).toBe(true);
+    expect(result.current.path).toEqual([]);
+
+    act(() => {
+      handled = result.current.goBack();
+    });
+    expect(handled).toBe(false);
+    expect(result.current.open).toBe(true);
+  });
+
+  it("falls back to the list when the open page's definition goes away", () => {
+    const { result } = renderHook(() => useMenuState({ defaultOpen: true }));
+    act(() => result.current.openSub({ id: "row", depth: 0 }));
+
+    const keepNoPage = () => false;
+    act(() => result.current.prunePages(keepNoPage));
+
+    expect(result.current.path).toEqual([]);
+    let handled = true;
+    act(() => {
+      handled = result.current.goBack();
+    });
+    expect(handled).toBe(false);
+  });
+});
@@ -7,6 +7,7 @@ import {
  goBack as goBackPath,
  MENU_ROOT_PATH,
  openSubPage,
+  pruneMissingPages,
  type MenuPath,
 } from "./menu-navigation";
 import type { Rect } from "../anchor";
@@ -40,7 +41,10 @@ export interface MenuContextValue {
  path: MenuPath;
  openSub: (sub: { id: string; depth: number }) => void;
  closeSub: (depth: number) => void;
-  goBack: () => void;
+  /** Pops the open page. False at the root, where Back is the surface's to answer. */
+  goBack: () => boolean;
+  /** Closes any open page that no longer has a definition, falling back to its parent. */
+  prunePages: (hasPage: (id: string) => boolean) => void;
 }

 const MenuContext = createContext<MenuContextValue | null>(null);
@@ -160,7 +164,13 @@ export function useMenuState({
  }, []);

  const goBack = useCallback(() => {
+    if (path.length === 0) return false;
    setPath((current) => goBackPath(current));
+    return true;
+  }, [path.length]);
+
+  const prunePages = useCallback((hasPage: (id: string) => boolean) => {
+    setPath((current) => pruneMissingPages(current, hasPage));
  }, []);

  return useMemo(
@@ -176,7 +186,19 @@ export function useMenuState({
      openSub,
      closeSub,
      goBack,
+      prunePages,
    }),
-    [isOpen, setOpen, selectItem, anchorRect, presentation, path, openSub, closeSub, goBack],
+    [
+      isOpen,
+      setOpen,
+      selectItem,
+      anchorRect,
+      presentation,
+      path,
+      openSub,
+      closeSub,
+      goBack,
+      prunePages,
+    ],
  );
 }
@@ -6,6 +6,7 @@ import {
  isSubPageOpen,
  MENU_ROOT_PATH,
  openSubPage,
+  pruneMissingPages,
 } from "./menu-navigation";

 describe("openSubPage", () => {
@@ -73,3 +74,15 @@ describe("isSubPageOpen", () => {
    expect(isSubPageOpen(path, { id: "grouping", depth: 0 })).toBe(false);
  });
 });
+
+describe("pruneMissingPages", () => {
+  it("falls back to the deepest page that still exists", () => {
+    expect(pruneMissingPages(["list", "row"], (id) => id === "list")).toEqual(["list"]);
+    expect(pruneMissingPages(["list", "row"], (id) => id === "row")).toEqual([]);
+  });
+
+  it("returns the same path when every page exists", () => {
+    const path = ["list", "row"];
+    expect(pruneMissingPages(path, () => true)).toBe(path);
+  });
+});
@@ -33,6 +33,16 @@ export function closeSubPage(path: MenuPath, depth: number): MenuPath {
  return path.slice(0, depth);
 }

+/**
+ * Cuts the path back to the deepest page that still has a definition. A page can lose its
+ * definition while it is open (a subagent's page goes with its row when the subagent is
+ * archived), and the pages it opened go with it.
+ */
+export function pruneMissingPages(path: MenuPath, hasPage: (id: string) => boolean): MenuPath {
+  const missing = path.findIndex((id) => !hasPage(id));
+  return missing === -1 ? path : path.slice(0, missing);
+}
+
 export function goBack(path: MenuPath): MenuPath {
  if (path.length === 0) return path;
  return path.slice(0, -1);
@@ -19,6 +19,11 @@ import {
  useIsolatedBottomSheetVisibility,
  type ContextBridge,
 } from "@/components/ui/isolated-bottom-sheet-modal";
+import {
+  FULL_SHEET_SNAP_POINTS,
+  SheetBackground,
+  SheetHandle,
+} from "@/components/adaptive-modal-sheet";
 import { SPACING, type Theme } from "@/styles/theme";
 import { useRetainedPanelActive } from "@/components/retained-panel";
 import { useMenuContext, MenuContextProvider } from "./menu-context";
@@ -32,24 +37,6 @@ import type { KeyboardFocusScope } from "@/keyboard/actions";
 const ThemedChevronLeft = withUnistyles(ChevronLeft);
 const mutedIconMapping = (theme: Theme) => ({ color: theme.colors.foregroundMuted });

-// `backgroundStyle` and `handleIndicatorStyle` are style-shaped props the Babel plugin does not
-// track, so the sheet is wrapped rather than reading the theme through a hook.
-// See docs/unistyles.md.
-const ThemedBottomSheetModal = withUnistyles(IsolatedBottomSheetModal, (theme) => ({
-  backgroundStyle: {
-    borderTopLeftRadius: theme.borderRadius.xl,
-    borderTopRightRadius: theme.borderRadius.xl,
-    borderWidth: 1,
-    backgroundColor: theme.colors.surface0,
-    borderColor: theme.colors.border,
-  },
-  handleIndicatorStyle: {
-    width: 36,
-    height: 4,
-    backgroundColor: theme.colors.surface2,
-  },
-}));
-
 /** How long the pointer must rest on a submenu row before its flyout opens. */
 const HOVER_OPEN_DELAY_MS = 90;
 /**
@@ -65,7 +52,7 @@ const HOVER_CLOSE_GRACE_MS = 260;
 */
 const SUBMENU_OVERLAP = 5;

-export interface MenuPageDefinition {
+export interface MenuListPageDefinition {
  id: string;
  title: string;
  content: ReactNode;
@@ -78,6 +65,24 @@ export interface MenuPageDefinition {
   * surface stops closing on hover, since its parent leads back to the same dismissal.
   */
  hoverIntent?: boolean;
+  fill?: false;
+}
+
+/**
+ * A sheet page that takes the sheet's full height and draws everything itself, header included:
+ * no back header, no scroller, no content panning. Only the sheet presentation opens one; a
+ * popover never has a trigger for it.
+ */
+export interface MenuFillPageDefinition {
+  id: string;
+  fill: true;
+  content: ReactNode;
+}
+
+export type MenuPageDefinition = MenuListPageDefinition | MenuFillPageDefinition;
+
+function pageHoverIntent(page: MenuPageDefinition | undefined): boolean {
+  return !page || page.fill === true || page.hoverIntent !== false;
 }

 interface MenuSurfaceContextValue {
@@ -126,8 +131,15 @@ export interface MenuSurfaceProps {
 * popover (plus one flyout per open submenu) or a bottom sheet showing one page at a time.
 */
 export function MenuSurface(props: MenuSurfaceProps): ReactElement | null {
-  const { presentation, open, setOpen } = useMenuContext("MenuSurface");
+  const { presentation, open, setOpen, path, prunePages } = useMenuContext("MenuSurface");
  const active = useRetainedPanelActive();
+  // An open page whose definition went away (its row was removed) falls back to its parent, so
+  // neither a render nor a later Back walks a path to a page that no longer exists.
+  const { pages } = props;
+  useEffect(() => {
+    if (path.length === 0) return;
+    prunePages((id) => pages?.some((page) => page.id === id) ?? false);
+  }, [pages, path, prunePages]);
  // A menu belongs to the panel that opened it. When that panel leaves the screen the menu closes
  // for good, rather than waiting hidden to reappear with the panel: a row that opened a sheet
  // and promoted it to a tab, say, would otherwise bring the list back on the next tab switch.
@@ -234,11 +246,11 @@ function MenuPopoverSurface({
  // `hoverIntent: false` takes a page off the pointer entirely — it is not opened by resting on
  // its trigger, and while it is open nothing on this surface closes on a pointer leaving it.
  const hoverValue = useMemo<MenuSurfaceContextValue>(() => {
-    const locked = openPages.some(({ page }) => page.hoverIntent === false);
+    const locked = openPages.some(({ page }) => !pageHoverIntent(page));
    return {
      ...surfaceValue,
      hoverOpen: (sub) => {
-        if (pages.find((page) => page.id === sub.id)?.hoverIntent === false) return;
+        if (!pageHoverIntent(pages.find((page) => page.id === sub.id))) return;
        surfaceValue.hoverOpen(sub);
      },
      hoverClose: (depth) => {
@@ -353,17 +365,6 @@ function MenuSheetSurface({
  const { height: windowHeight } = useWindowDimensions();
  const menu = useMenuContext("MenuSurface");
  const { value: surfaceValue } = useSubAnchors();
-  const safeAreaInsets = useSafeAreaInsets();
-
-  const sheetScrollContentStyle = useMemo(
-    () => ({
-      paddingBottom: getMenuSheetBottomPadding({
-        safeAreaBottom: safeAreaInsets.bottom,
-        breathingRoom: SPACING[1],
-      }),
-    }),
-    [safeAreaInsets.bottom],
-  );
  const sheetDataSet = useMemo(
    () => (keyboardFocusScope ? { keyboardScope: keyboardFocusScope } : undefined),
    [keyboardFocusScope],
@@ -374,11 +375,15 @@ function MenuSheetSurface({
    visible: menu.open,
    isEnabled: true,
    onClose: handleClose,
+    // Android Back steps back through the pages before it closes the sheet.
+    onBack: menu.goBack,
  });

  const openPageId = currentPageId(menu.path);
  const openPage = openPageId ? pages.find((page) => page.id === openPageId) : null;
  const depth = menu.path.length;
+  const fillPage = openPage?.fill === true ? openPage : null;
+  const listPage = openPage?.fill === true ? null : openPage;

  // The sheet's content is teleported out of this subtree, so both menu contexts have to be
  // rebuilt on the other side. Providing them around the modal instead would put them on the
@@ -393,12 +398,18 @@ function MenuSheetSurface({
  );

  return (
-    <ThemedBottomSheetModal
+    <IsolatedBottomSheetModal
      ref={sheetRef}
      contextBridge={contextBridge}
+      backgroundComponent={SheetBackground}
+      handleComponent={SheetHandle}
      // Content-sized rather than fixed snap points: a pushed page is rarely the same height
      // as the page it replaced, and a fixed sheet would either clip it or leave dead space.
-      enableDynamicSizing
+      // A fill page is the exception: it takes the height every full sheet has, and its own
+      // content scrolls, so dragging it would fight that scroll.
+      enableDynamicSizing={!fillPage}
+      snapPoints={fillPage ? FULL_SHEET_SNAP_POINTS : undefined}
+      enableContentPanningGesture={!fillPage}
      maxDynamicContentSize={windowHeight * 0.8}
      onChange={handleSheetChange}
      onDismiss={handleSheetDismiss}
@@ -412,28 +423,64 @@ function MenuSheetSurface({
      keyboardBehavior="interactive"
      keyboardBlurBehavior="restore"
    >
-      <BottomSheetScrollView
-        dataSet={sheetDataSet}
-        contentContainerStyle={sheetScrollContentStyle}
-        keyboardShouldPersistTaps="handled"
-        showsVerticalScrollIndicator={false}
-        testID={testID ? `${testID}-content` : undefined}
-      >
-        {openPage ? (
-          <>
-            <MenuSheetHeader title={openPage.title} onBack={menu.goBack} />
-            <MenuPage depth={depth}>{openPage.content}</MenuPage>
-          </>
-        ) : (
-          <>
-            {sheetTitle ? (
-              <MenuSheetHeader title={sheetTitle} onBack={null} trailing={sheetTrailing} />
-            ) : null}
-            <MenuPage depth={0}>{children}</MenuPage>
-          </>
-        )}
-      </BottomSheetScrollView>
-    </ThemedBottomSheetModal>
+      {fillPage ? (
+        <View style={styles.fillPage} testID={testID ? `${testID}-${fillPage.id}` : undefined}>
+          {fillPage.content}
+        </View>
+      ) : (
+        <MenuSheetScrollView dataSet={sheetDataSet} testID={testID}>
+          {listPage ? (
+            <>
+              <MenuSheetHeader title={listPage.title} onBack={menu.goBack} />
+              <MenuPage depth={depth}>{listPage.content}</MenuPage>
+            </>
+          ) : (
+            <>
+              {sheetTitle ? (
+                <MenuSheetHeader title={sheetTitle} onBack={null} trailing={sheetTrailing} />
+              ) : null}
+              <MenuPage depth={0}>{children}</MenuPage>
+            </>
+          )}
+        </MenuSheetScrollView>
+      )}
+    </IsolatedBottomSheetModal>
+  );
+}
+
+/**
+ * Rendered on the far side of the sheet's portal so it clears the screen's bottom inset, not the
+ * one left where the menu was opened: inside a sheet tab, none is.
+ */
+function MenuSheetScrollView({
+  dataSet,
+  testID,
+  children,
+}: {
+  dataSet: { keyboardScope: KeyboardFocusScope } | undefined;
+  testID?: string;
+  children: ReactNode;
+}) {
+  const safeAreaInsets = useSafeAreaInsets();
+  const contentStyle = useMemo(
+    () => ({
+      paddingBottom: getMenuSheetBottomPadding({
+        safeAreaBottom: safeAreaInsets.bottom,
+        breathingRoom: SPACING[1],
+      }),
+    }),
+    [safeAreaInsets.bottom],
+  );
+  return (
+    <BottomSheetScrollView
+      dataSet={dataSet}
+      contentContainerStyle={contentStyle}
+      keyboardShouldPersistTaps="handled"
+      showsVerticalScrollIndicator={false}
+      testID={testID ? `${testID}-content` : undefined}
+    >
+      {children}
+    </BottomSheetScrollView>
  );
 }

@@ -470,6 +517,10 @@ function MenuSheetHeader({
 }

 const styles = StyleSheet.create((theme) => ({
+  fillPage: {
+    flex: 1,
+    minHeight: 0,
+  },
  sheetHeader: {
    flexDirection: "row",
    alignItems: "center",
@@ -1,5 +1,5 @@
 import { useState, useCallback, useMemo, type ReactNode } from "react";
-import { View, type LayoutChangeEvent } from "react-native";
+import { View, type LayoutChangeEvent, type ViewStyle } from "react-native";
 import { StyleSheet } from "react-native-unistyles";
 import { useTranslation } from "react-i18next";
 import type { AgentMessage } from "@getpaseo/protocol/agent-message";
@@ -8,23 +8,29 @@ import { EdgeFade } from "@/components/ui/edge-fade";
 import { useProviderIcon } from "@/components/provider-icons";
 import { useSessionStore } from "@/stores/session-store";
 import { navigateToAgent } from "@/utils/navigate-to-agent";
+import { isNative } from "@/constants/platform";

 const PREVIEW_HEIGHT = 240;
+// Native View still clips with "scroll", but Yoga measures its children without
+// the height cap. "hidden" caps the measured body too, hiding the expand control.
+const previewStyle: ViewStyle = {
+  maxHeight: PREVIEW_HEIGHT,
+  overflow: isNative ? "scroll" : "hidden",
+};

 export function MessagePreview({ children }: { children: ReactNode }) {
  const { t } = useTranslation();
  const [expanded, setExpanded] = useState(false);
-  const [height, setHeight] = useState(0);
-  const overflowing = height > PREVIEW_HEIGHT;
+  const [overflowing, setOverflowing] = useState(false);
  const measure = useCallback(
-    (event: LayoutChangeEvent) => setHeight(event.nativeEvent.layout.height),
+    (event: LayoutChangeEvent) => setOverflowing(event.nativeEvent.layout.height > PREVIEW_HEIGHT),
    [],
  );
  const toggle = useCallback(() => setExpanded((value) => !value), []);
  const accessibilityState = useMemo(() => ({ expanded }), [expanded]);
  return (
    <>
-      <View style={!expanded && styles.preview}>
+      <View style={!expanded && previewStyle}>
        <View style={styles.body} onLayout={measure}>
          {children}
        </View>
@@ -74,6 +80,8 @@ export function MessageSender({
      size="sm"
      leftIcon={renderProviderIcon}
      style={styles.sender}
+      textStyle={styles.senderText}
+      numberOfLines={1}
      disabled={!host}
      onPress={openSender}
    >
@@ -83,9 +91,9 @@ export function MessageSender({
 }

 const styles = StyleSheet.create((theme) => ({
-  preview: { maxHeight: PREVIEW_HEIGHT, overflow: "hidden" },
  body: { flexShrink: 0 },
-  sender: { paddingRight: 0, borderRightWidth: 0 },
+  sender: { paddingRight: 0, borderRightWidth: 0, maxWidth: "100%" },
+  senderText: { flexShrink: 1 },
  toggle: { alignSelf: "flex-start", paddingHorizontal: 0, minHeight: 0, borderWidth: 0 },
  expandedToggle: { marginTop: theme.spacing[2] },
  fade: { position: "absolute", bottom: 0, left: 0, right: 0, height: theme.spacing[12] },
@@ -41,7 +41,7 @@ import {
  useWorkspaceAttachmentsStore,
 } from "@/attachments/workspace-attachments-store";
 import type { UserMessageImageAttachment } from "@/types/stream";
-import { COMPACT_FORM_FACTOR_WIDTH, useIsCompactFormFactor } from "@/constants/layout";
+import { COMPACT_CONTENT_WIDTH, useIsCompactFormFactor } from "@/constants/layout";
 import { isWeb } from "@/constants/platform";
 import {
  buildWorkspaceTabPersistenceKey,
@@ -390,7 +390,7 @@ export function WorkspaceDraftAgentTab({
  const editingSession = useComposerEditingSession("chat");
  const isComposerFullscreen = useComposerFullscreen(editingSession);
  const { onLayout: onInputAreaLayout, isBelow: isCompactComposerLayout } = useContainerWidthBelow(
-    COMPACT_FORM_FACTOR_WIDTH,
+    COMPACT_CONTENT_WIDTH,
    { initialIsBelow: isCompactFormFactor },
  );
  const workspaceAttachmentScopeKey = useWorkspaceAttachmentScopeKey({
@@ -8,6 +8,8 @@ import {
  MenuSurface,
  MenuTrigger,
  useMenuContext,
+  useMenuDepth,
+  type MenuPageDefinition,
  type MenuTriggerState,
 } from "@/components/ui/menu";
 import { StatusRing } from "@/components/status-ring";
@@ -61,6 +63,8 @@ export interface ComposerTrackPillProps {
  accessibilityLabel?: string;
  /** Panel body. Rendered into a popover on wide screens and a sheet on compact ones. */
  children: ReactNode;
+  /** Pages a row can open in place of the list (`ComposerTrackRow` `opensPage`). */
+  pages?: readonly MenuPageDefinition[];
 }

 /**
@@ -85,6 +89,7 @@ export function ComposerTrackPill({
  testID,
  accessibilityLabel,
  children,
+  pages,
 }: ComposerTrackPillProps): ReactElement {
  return (
    <MenuRoot compactMode="sheet">
@@ -98,6 +103,7 @@ export function ComposerTrackPill({
        align="start"
        offset={PANEL_OFFSET}
        sheetTitle={panelTitle}
+        pages={pages}
        minWidth={PANEL_MIN_WIDTH}
        maxWidth={PANEL_MAX_WIDTH}
        maxHeight={PANEL_MAX_HEIGHT}
@@ -199,6 +205,11 @@ export interface ComposerTrackRowProps {
   * lands inside the panel is not.
   */
  closeOnSelect?: boolean;
+  /**
+   * A page of the panel this row opens in place of the list, instead of running `onPress`. The
+   * panel stays open: Back returns to the list.
+   */
+  opensPage?: string;
  disabled?: boolean;
  accessibilityLabel?: string;
  testID?: string;
@@ -220,18 +231,23 @@ export function ComposerTrackRow({
  children,
  onPress,
  closeOnSelect = true,
+  opensPage,
  disabled = false,
  accessibilityLabel,
  testID,
 }: ComposerTrackRowProps): ReactElement {
-  const { selectItem } = useMenuContext("ComposerTrackRow");
+  const { selectItem, openSub } = useMenuContext("ComposerTrackRow");
+  const depth = useMenuDepth();
  const [hovered, setHovered] = useState(false);
  const handlePointerEnter = useCallback(() => setHovered(true), []);
  const handlePointerLeave = useCallback(() => setHovered(false), []);
-  const handleSelect = useCallback(
-    () => selectItem(onPress, closeOnSelect),
-    [closeOnSelect, onPress, selectItem],
-  );
+  const handleSelect = useCallback(() => {
+    if (opensPage) {
+      selectItem(() => openSub({ id: opensPage, depth }), false);
+      return;
+    }
+    selectItem(onPress, closeOnSelect);
+  }, [closeOnSelect, depth, onPress, openSub, opensPage, selectItem]);

  const itemDataSet = useMemo(
    () => ({ menuItem: "true", menuDisabled: disabled ? "true" : "false" }),
@@ -251,7 +267,7 @@ export function ComposerTrackRow({
    [hovered, renderRow],
  );

-  if (!onPress) {
+  if (!onPress && !opensPage) {
    return <View accessibilityLabel={accessibilityLabel}>{renderRow(false)}</View>;
  }

@@ -11,10 +11,11 @@ export const HEADER_INNER_HEIGHT_MOBILE = 56;
 export const WORKSPACE_SECONDARY_HEADER_HEIGHT = 36;
 export const HEADER_TOP_PADDING_MOBILE = 8;

-export const COMPACT_FORM_FACTOR_WIDTH = 500;
+// Measured composer width; independent of the window's compact/wide breakpoint.
+export const COMPACT_CONTENT_WIDTH = 500;

-// Settings uses the canonical desktop list + detail layout. Its sidebar and
-// detail target must fit together before it can share width with app navigation.
+// Settings navigation can shrink below its preferred width to preserve the detail
+// minimum. Both targets must fit before Settings shares width with app navigation.
 export const SETTINGS_DESKTOP_SIDEBAR_WIDTH = 320;
 export const SETTINGS_DESKTOP_DETAIL_MIN_WIDTH = 400;
 export const SETTINGS_DESKTOP_SPLIT_MIN_WIDTH =
@@ -33,7 +34,7 @@ export {
  getIsElectronMac as getIsElectronRuntimeMac,
 } from "./platform";

-/** Below 600 points, sidebars overlay the workspace. Medium and wider layouts dock them. */
+/** Below md (600 points), sidebars overlay the workspace; wider layouts can dock them. */
 export function isCompactBreakpoint(breakpoint: string | undefined): boolean {
  return breakpoint === "xs" || breakpoint === "sm";
 }
@@ -1914,7 +1914,6 @@ export const ar: TranslationResources = {
    parent: {
      backToParent: "العودة إلى الوكيل الأصلي",
      backTo: "العودة إلى {{label}}",
-      parent: "الأصل",
      parentAgent: "الوكيل الأصلي",
      openParent: "فتح الوكيل الأصلي",
    },
@@ -1939,7 +1939,6 @@ export const en = {
    parent: {
      backToParent: "Back to parent",
      backTo: "Back to {{label}}",
-      parent: "Parent",
      parentAgent: "Parent agent",
      openParent: "Open parent",
    },
@@ -1962,7 +1962,6 @@ export const es: TranslationResources = {
    parent: {
      backToParent: "Volver al padre",
      backTo: "Volver a {{label}}",
-      parent: "Padre",
      parentAgent: "Agente padre",
      openParent: "Abrir padre",
    },
@@ -1960,7 +1960,6 @@ export const fr: TranslationResources = {
    parent: {
      backToParent: "Retour au parent",
      backTo: "Retour à {{label}}",
-      parent: "Parent",
      parentAgent: "Agent parent",
      openParent: "Ouvrir le parent",
    },
@@ -1933,7 +1933,6 @@ export const ja: TranslationResources = {
    parent: {
      backToParent: "親に戻る",
      backTo: "{{label}} に戻る",
-      parent: "親",
      parentAgent: "親エージェント",
      openParent: "親を開く",
    },
@@ -1924,7 +1924,6 @@ export const ko: TranslationResources = {
    parent: {
      backToParent: "상위 에이전트로 돌아가기",
      backTo: "{{label}}(으)로 돌아가기",
-      parent: "상위",
      parentAgent: "상위 에이전트",
      openParent: "상위 에이전트 열기",
    },
@@ -1947,7 +1947,6 @@ export const ptBR: TranslationResources = {
    parent: {
      backToParent: "Voltar ao pai",
      backTo: "Voltar para {{label}}",
-      parent: "Pai",
      parentAgent: "Agente pai",
      openParent: "Abrir pai",
    },
@@ -1946,7 +1946,6 @@ export const ru: TranslationResources = {
    parent: {
      backToParent: "Назад к родителю",
      backTo: "Назад к {{label}}",
-      parent: "Родитель",
      parentAgent: "Родительский агент",
      openParent: "Открыть родителя",
    },
@@ -1892,7 +1892,6 @@ export const zhCN: TranslationResources = {
    parent: {
      backToParent: "返回父代理",
      backTo: "返回 {{label}}",
-      parent: "父代理",
      parentAgent: "父代理",
      openParent: "打开父代理",
    },
@@ -44,7 +44,7 @@ import { useAgentDescriptor } from "@/agent-presentation";
 import { useToastHost, type ToastApi, type ToastState } from "@/components/toast-host";
 import type { WorkspaceComposerAttachment } from "@/attachments/types";
 import { useWorkspaceAttachmentScopeKey } from "@/attachments/workspace-attachments-store";
-import { COMPACT_FORM_FACTOR_WIDTH, useIsCompactFormFactor } from "@/constants/layout";
+import { COMPACT_CONTENT_WIDTH, useIsCompactFormFactor } from "@/constants/layout";
 import { isNative, isWeb } from "@/constants/platform";
 import { useAgentAttentionClear } from "@/hooks/use-agent-attention-clear";
 import { useAgentInputDraft, type AgentInputDraft } from "@/composer/draft/input-draft";
@@ -1512,7 +1512,7 @@ function ActiveAgentComposer({
 }) {
  const isCompactFormFactor = useIsCompactFormFactor();
  const { onLayout: onInputAreaLayout, isBelow: isCompactComposerLayout } = useContainerWidthBelow(
-    COMPACT_FORM_FACTOR_WIDTH,
+    COMPACT_CONTENT_WIDTH,
    { initialIsBelow: isCompactFormFactor },
  );
  const paneContext = usePaneContext();
@@ -13,7 +13,7 @@ import {
  type ArchiveFinishedStatus,
  useArchiveSubagent,
  useDetachSubagent,
-  useSubagentOpensInSheet,
+  useSubagentSheetTab,
  type SubagentRow,
 } from "@/subagents";
 import { ParentAgentPill } from "@/subagents/parent";
@@ -100,7 +100,7 @@ export const AgentTracks = memo(function AgentTracks({
    },
    [openSubagentTarget],
  );
-  const opensInSheet = useSubagentOpensInSheet(workspaceKey);
+  const sheetTabFor = useSubagentSheetTab(workspaceKey, tabId);
  const handleOpenChanges = useCallback(() => {
    if (!workspaceKey) {
      return;
@@ -134,7 +134,7 @@ export const AgentTracks = memo(function AgentTracks({
        rows={subagentRows}
        onOpenSubagent={handleOpenSubagent}
        onOpenProviderSubagent={handleOpenProviderSubagent}
-        opensInSheet={opensInSheet}
+        sheetTabFor={sheetTabFor}
        onArchiveSubagent={archiveSubagent}
        onArchiveFinished={onArchiveFinished}
        archiveFinishedStatus={archiveFinishedStatus}
@@ -16,9 +16,10 @@ import { usePaneContext } from "@/panels/pane-context";
 import { PaneSubtitle } from "@/panels/pane-subtitle";
 import { definePanel, type PanelDescriptor } from "@/panels/panel-registry";
 import { useSessionStore } from "@/stores/session-store";
+import type { SheetTab } from "@/stores/workspace-layout-store";
 import { ParentAgentCallout } from "@/subagents/parent";
 import { type SubagentRow, useSubagentsForParent } from "@/subagents/select";
-import { useSubagentOpensInSheet } from "@/subagents/opens-in-sheet";
+import { useSubagentSheetTab } from "@/subagents/sheet-tab";
 import { SubagentsTrack } from "@/subagents/track";
 import {
  providerSubagentKey,
@@ -51,12 +52,12 @@ function ProviderSubagentChildTrack({
  serverId,
  rows,
  onOpenProviderSubagent,
-  opensInSheet,
+  sheetTabFor,
 }: {
  serverId: string;
  rows: ReturnType<typeof useSubagentsForParent>;
  onOpenProviderSubagent: (parentAgentId: string, subagentId: string) => void;
-  opensInSheet: (row: SubagentRow) => boolean;
+  sheetTabFor: (row: SubagentRow) => SheetTab | null;
 }) {
  if (rows.length === 0) return null;
  return (
@@ -66,7 +67,7 @@ function ProviderSubagentChildTrack({
        rows={rows}
        onOpenSubagent={NOOP_SUBAGENT}
        onOpenProviderSubagent={onOpenProviderSubagent}
-        opensInSheet={opensInSheet}
+        sheetTabFor={sheetTabFor}
        onArchiveSubagent={NOOP_SUBAGENT}
      />
    </ComposerTrackBar>
@@ -116,7 +117,7 @@ function useProviderSubagentDescriptor(

 function ProviderSubagentPanel() {
  const { t } = useTranslation();
-  const { serverId, workspaceId, target, openFileInWorkspace, openTab } = usePaneContext();
+  const { serverId, workspaceId, tabId, target, openFileInWorkspace, openTab } = usePaneContext();
  invariant(target.kind === "provider_subagent", "ProviderSubagentPanel requires provider target");
  const key = providerSubagentKey(serverId, target.parentAgentId, target.subagentId);
  const streamId = `provider:${encodeURIComponent(target.parentAgentId)}:${encodeURIComponent(target.subagentId)}`;
@@ -144,8 +145,9 @@ function ProviderSubagentPanel() {
    providerParentSubagentId: target.subagentId,
  });
  const childTrackClearance = resolveChildTrackClearance(childRows.length, isCompact);
-  const opensInSheet = useSubagentOpensInSheet(
+  const sheetTabFor = useSubagentSheetTab(
    buildWorkspaceTabPersistenceKey({ serverId, workspaceId }),
+    tabId,
  );
  const openProviderChild = useCallback(
    (parentAgentId: string, subagentId: string) => {
@@ -274,7 +276,7 @@ function ProviderSubagentPanel() {
          serverId={serverId}
          rows={childRows}
          onOpenProviderSubagent={openProviderChild}
-          opensInSheet={opensInSheet}
+          sheetTabFor={sheetTabFor}
        />
      </View>
      <ParentAgentCallout serverId={serverId} parentAgentId={target.parentAgentId} />
@@ -34,11 +34,24 @@ import {
 import type { ContextBridge } from "@/components/ui/isolated-bottom-sheet-modal";

 import { render as renderEnvironment } from "@testing-library/react";
-import { useWorkspaceSheetEnvironment } from "@/screens/workspace/workspace-sheet-environment";
+import {
+  SheetPaneHostProvider,
+  useSheetPaneBridge,
+  type SheetPaneHost,
+} from "@/screens/workspace/sheet-pane";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { useAssistantFileLinkActions, type InlinePathTarget } from "@/assistant-file-links";

 Object.assign(globalThis, { IS_REACT_ACT_ENVIRONMENT: true });
+const SHEET_PANE_HOST: SheetPaneHost = {
+  workspaceKey: "host:workspace",
+  serverId: "host",
+  workspaceId: "workspace",
+  isWorkspaceFocused: true,
+  buildContent: () => {
+    throw new Error("The environment probe builds no pane content");
+  },
+};
 let root: Root;
 let container: HTMLDivElement;
 beforeEach(() => {
@@ -155,14 +168,21 @@ describe("workspace sheet environment", () => {
      }, [name]);
      return null;
    }
-    function Capture() {
-      bridge = useWorkspaceSheetEnvironment();
+    function CaptureBridge() {
+      bridge = useSheetPaneBridge();
      return (
        <ComposerEditingScope tabId="file" targetKey="file:a">
          <Probe name="pane" />
        </ComposerEditingScope>
      );
    }
+    function Capture() {
+      return (
+        <SheetPaneHostProvider value={SHEET_PANE_HOST}>
+          <CaptureBridge />
+        </SheetPaneHostProvider>
+      );
+    }
    function Source({ workspaceRoot, active }: { workspaceRoot: string; active: boolean }) {
      const onOpenFile = useCallback(
        (target: InlinePathTarget) => {
@@ -122,7 +122,11 @@ import { MetadataGenerationPage } from "@/screens/settings/metadata-generation-p
 import { HostVoicePage } from "@/screens/settings/voice/voice-page";
 import ProjectsScreen from "@/screens/projects-screen";
 import ProjectSettingsScreen from "@/screens/project-settings-screen";
-import { SETTINGS_DESKTOP_SIDEBAR_WIDTH, useIsCompactFormFactor } from "@/constants/layout";
+import {
+  SETTINGS_DESKTOP_DETAIL_MIN_WIDTH,
+  SETTINGS_DESKTOP_SIDEBAR_WIDTH,
+  useIsCompactFormFactor,
+} from "@/constants/layout";
 import { densityIconBox, densityIconSize } from "@/styles/density";
 import { useLocalDaemonServerId } from "@/hooks/use-is-local-daemon";
 import {
@@ -1544,12 +1548,14 @@ const desktopStyles = StyleSheet.create({
  },
  contentPane: {
    flex: 1,
+    minWidth: SETTINGS_DESKTOP_DETAIL_MIN_WIDTH,
  },
 });

 const sidebarStyles = StyleSheet.create((theme) => ({
  desktopContainer: {
    width: SETTINGS_DESKTOP_SIDEBAR_WIDTH,
+    flexShrink: 1,
    borderRightWidth: 1,
    borderRightColor: theme.colors.border,
    backgroundColor: theme.colors.surfaceSidebar,
@@ -0,0 +1,84 @@
+import React, { createContext, useCallback, useContext, type ReactNode } from "react";
+import invariant from "tiny-invariant";
+import { NavigationContext, NavigationRouteContext } from "expo-router/react-navigation";
+import { useAssistantFileLinkEnvironmentBridge } from "@/assistant-file-links";
+import { useComposerEditingEnvironmentBridge } from "@/composer/editing-session";
+import { RetainedPanelActivity, useRetainedPanelActive } from "@/components/retained-panel";
+import type { ContextBridge } from "@/components/ui/isolated-bottom-sheet-modal";
+import { useDiffDocumentWorkspaceCacheBridge } from "@/git/diff-document/workspace-cache";
+import { HostRouteProvider, useHostRouteServerId } from "@/navigation/host-route-context";
+import type { WorkspacePaneContentModel } from "@/screens/workspace/workspace-pane-content";
+import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
+
+/** What a sheet pane needs from the workspace it shows a tab of. */
+export interface SheetPaneHost {
+  workspaceKey: string;
+  serverId: string;
+  workspaceId: string;
+  isWorkspaceFocused: boolean;
+  /** The pane content for a sheet's tab. Closing the tab from inside it runs `closeCurrentTab`. */
+  buildContent: (
+    tab: WorkspaceTabDescriptor,
+    closeCurrentTab: () => void,
+  ) => WorkspacePaneContentModel;
+}
+
+const SheetPaneHostContext = createContext<SheetPaneHost | null>(null);
+
+/** `null` while there is no workspace to show sheets for. */
+export function SheetPaneHostProvider({
+  value,
+  children,
+}: {
+  value: SheetPaneHost | null;
+  children: ReactNode;
+}) {
+  return <SheetPaneHostContext.Provider value={value}>{children}</SheetPaneHostContext.Provider>;
+}
+
+/** The host of the workspace the caller is in, or null while there is none. */
+export function useSheetPaneHostIfAny(): SheetPaneHost | null {
+  return useContext(SheetPaneHostContext);
+}
+
+export function useSheetPaneHost(): SheetPaneHost {
+  const host = useSheetPaneHostIfAny();
+  invariant(host, "SheetPaneHostProvider is required");
+  return host;
+}
+
+/**
+ * Carries a sheet pane's environment across the portal into the app overlay host: the workspace
+ * host, and the environment of the built-in panels. Pane identity is supplied by the pane itself.
+ */
+export function useSheetPaneBridge(): ContextBridge {
+  const host = useSheetPaneHost();
+  const editing = useComposerEditingEnvironmentBridge();
+  const cache = useDiffDocumentWorkspaceCacheBridge();
+  const files = useAssistantFileLinkEnvironmentBridge();
+  const active = useRetainedPanelActive();
+  const serverId = useHostRouteServerId();
+  const navigation = useContext(NavigationContext);
+  const route = useContext(NavigationRouteContext);
+  return useCallback(
+    (children) => {
+      const content = editing(cache(files(children)));
+      return (
+        <SheetPaneHostContext.Provider value={host}>
+          <NavigationContext.Provider value={navigation}>
+            <NavigationRouteContext.Provider value={route}>
+              <RetainedPanelActivity active={active}>
+                {serverId ? (
+                  <HostRouteProvider serverId={serverId}>{content}</HostRouteProvider>
+                ) : (
+                  content
+                )}
+              </RetainedPanelActivity>
+            </NavigationRouteContext.Provider>
+          </NavigationContext.Provider>
+        </SheetPaneHostContext.Provider>
+      );
+    },
+    [host, editing, cache, files, active, serverId, navigation, route],
+  );
+}
@@ -0,0 +1,16 @@
+/**
+ * A workspace tab shown in a sheet. One pane — header, body, bottom inset, focus — behind every
+ * sheet container: the workspace's sheet tabs, and pages of a menu that shows a sheet in place.
+ *
+ * See docs/explorer-sidebar.md.
+ */
+
+export {
+  SheetPaneHostProvider,
+  useSheetPaneBridge,
+  useSheetPaneHost,
+  useSheetPaneHostIfAny,
+  type SheetPaneHost,
+} from "./host";
+export { SheetPane, useLeaveSheet, type SheetPaneProps } from "./sheet-pane";
+export { useSheetPanePage } from "./page";
@@ -0,0 +1,38 @@
+import { useCallback } from "react";
+import { useMenuContext, type MenuFillPageDefinition } from "@/components/ui/menu";
+import { usePaneContext } from "@/panels/pane-context";
+import type { SheetTab } from "@/stores/workspace-layout-store";
+import type { WorkspaceTabTarget } from "@/workspace-tabs/model";
+import { useSheetPaneBridge } from "./host";
+import { SheetPane } from "./sheet-pane";
+
+/**
+ * Shows sheet tabs as pages of a menu opened from a pane, so a row's sheet replaces the list it
+ * was chosen from instead of stacking a second sheet over it. Back returns to the list; Close
+ * closes the menu, which uncovers the pane the menu was opened from.
+ */
+export function useSheetPanePage(): (sheet: SheetTab) => MenuFillPageDefinition {
+  const bridge = useSheetPaneBridge();
+  const { target: opener } = usePaneContext();
+  return useCallback(
+    (sheet) => ({
+      id: sheet.tab.tabId,
+      fill: true,
+      content: bridge(
+        // Keyed like the detached container, so the panel's descriptor hook stays fixed per page.
+        <MenuSheetPane
+          key={`${sheet.tab.tabId}:${sheet.tab.target.kind}`}
+          sheet={sheet}
+          opener={opener}
+        />,
+      ),
+    }),
+    [bridge, opener],
+  );
+}
+
+function MenuSheetPane({ sheet, opener }: { sheet: SheetTab; opener: WorkspaceTabTarget }) {
+  const { setOpen, goBack } = useMenuContext("MenuSheetPane");
+  const close = useCallback(() => setOpen(false), [setOpen]);
+  return <SheetPane sheet={sheet} onClose={close} onBack={goBack} opener={opener} isTop />;
+}
@@ -0,0 +1,207 @@
+import {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useLayoutEffect,
+  useMemo,
+  type ComponentType,
+} from "react";
+import { View } from "react-native";
+import { useTranslation } from "react-i18next";
+import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import { Maximize2 } from "lucide-react-native";
+import {
+  SheetBottomInset,
+  SheetDragArea,
+  SheetHeaderIconButton,
+  SheetHeaderView,
+  type SheetHeader,
+} from "@/components/adaptive-modal-sheet";
+import type { PanelIconProps } from "@/panels/panel-registry";
+import { getPanelRegistration } from "@/panels/panel-registry";
+import { getHostRuntimeStore } from "@/runtime/host-runtime";
+import { useSessionStore } from "@/stores/session-store";
+import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
+import { WorkspacePaneContent } from "@/screens/workspace/workspace-pane-content";
+import { useWorkspaceLayoutStore, type SheetTab } from "@/stores/workspace-layout-store";
+import { workspaceTabTargetsEqual } from "@/workspace-tabs/identity";
+import type { WorkspaceTabTarget } from "@/workspace-tabs/model";
+import { useSheetPaneHost } from "./host";
+
+function PanelIcon({
+  icon: Icon,
+  size,
+  color,
+}: { icon: ComponentType<PanelIconProps> } & PanelIconProps) {
+  return <Icon size={size} color={color} />;
+}
+
+const ThemedPanelIcon = withUnistyles(PanelIcon, (theme) => ({
+  color: theme.colors.foregroundMuted,
+}));
+
+export interface SheetPaneProps {
+  sheet: SheetTab;
+  /** Closes the sheet, everything it was chosen from included. */
+  onClose: () => void;
+  /** Steps back to the list the sheet was chosen from, when there is one. */
+  onBack?: () => void;
+  /** The pane closing the sheet uncovers, when the container knows it. */
+  opener?: WorkspaceTabTarget | null;
+  /** Only the top sheet's pane is focused; a covered one stays as live as the pane under it. */
+  isTop: boolean;
+}
+
+interface SheetPaneExit {
+  close: () => void;
+  opener: WorkspaceTabTarget | null;
+}
+
+const SheetPaneExitContext = createContext<SheetPaneExit | null>(null);
+
+/**
+ * A tab shown in a sheet: its header (icon, title, Back, Open as tab, Close), which drags the
+ * sheet, over its pane. Every sheet container renders this; only the container differs.
+ */
+export function SheetPane({ sheet, onClose, onBack, opener = null, isTop }: SheetPaneProps) {
+  const { t } = useTranslation();
+  const host = useSheetPaneHost();
+  const { tab } = sheet;
+  const registration = getPanelRegistration(tab.target.kind);
+  if (!registration) {
+    throw new Error(`No panel registration for kind: ${tab.target.kind}`);
+  }
+  const descriptor = registration.useDescriptor(tab.target as never, {
+    serverId: host.serverId,
+    workspaceId: host.workspaceId,
+    tabId: tab.tabId,
+  });
+
+  const openTabInFront = useWorkspaceLayoutStore((state) => state.openTabInFront);
+  const { workspaceKey } = host;
+  const handleOpenAsTab = useCallback(
+    () => openTabInFront(workspaceKey, sheet),
+    [openTabInFront, sheet, workspaceKey],
+  );
+  const header = useMemo<SheetHeader>(
+    () => ({
+      title: descriptor.label,
+      leading: <ThemedPanelIcon icon={descriptor.icon} size={16} />,
+      back: onBack ? { onPress: onBack } : undefined,
+      // The sheet is for looking; the full-screen glyph takes the tab out of the sheet and into
+      // the switcher, where it gets its composer back.
+      actions: sheet.policy.openAsTab ? (
+        <SheetHeaderIconButton
+          icon={Maximize2}
+          accessibilityLabel={t("workspace.sheet.openAsTab")}
+          onPress={handleOpenAsTab}
+          testID="sheet-tab-open-as-tab"
+        />
+      ) : undefined,
+    }),
+    [descriptor.icon, descriptor.label, handleOpenAsTab, onBack, sheet.policy.openAsTab, t],
+  );
+
+  const tabDescriptor = useMemo<WorkspaceTabDescriptor>(
+    () => ({
+      key: tab.tabId,
+      tabId: tab.tabId,
+      kind: tab.target.kind,
+      target: tab.target,
+      state: tab.state,
+    }),
+    [tab],
+  );
+  const { buildContent } = host;
+  const content = useMemo(
+    () => buildContent(tabDescriptor, onClose),
+    [buildContent, onClose, tabDescriptor],
+  );
+  const exit = useMemo<SheetPaneExit>(() => ({ close: onClose, opener }), [onClose, opener]);
+  const isPaneFocused = isTop && host.isWorkspaceFocused;
+  useViewedSheetAgent({
+    sourceId: `${workspaceKey}:sheet:${tab.tabId}`,
+    serverId: host.serverId,
+    agentId: isPaneFocused && tab.target.kind === "agent" ? tab.target.agentId : null,
+  });
+
+  return (
+    <SheetPaneExitContext.Provider value={exit}>
+      <View style={styles.pane}>
+        {/* The body scrolls on its own, so the header is where the sheet drags from. */}
+        <SheetDragArea>
+          <SheetHeaderView header={header} onClose={onClose} testID="sheet-tab-header" />
+        </SheetDragArea>
+        <SheetBottomInset
+          style={styles.body}
+          role="dialog"
+          aria-label={descriptor.label}
+          testID="sheet-tab-body"
+        >
+          <WorkspacePaneContent
+            content={content}
+            isWorkspaceFocused={host.isWorkspaceFocused}
+            isPaneFocused={isPaneFocused}
+          />
+        </SheetBottomInset>
+      </View>
+    </SheetPaneExitContext.Provider>
+  );
+}
+
+/**
+ * The agent of the sheet on top is viewed, alongside the pane under it: its timeline catches up
+ * and stays live. The workspace only publishes the agents of its panes.
+ */
+function useViewedSheetAgent({
+  sourceId,
+  serverId,
+  agentId,
+}: {
+  sourceId: string;
+  serverId: string;
+  agentId: string | null;
+}) {
+  const viewedTimelineSync = useSessionStore(
+    (state) => state.sessions[serverId]?.viewedTimelineSync ?? null,
+  );
+  useEffect(() => {
+    if (!agentId) return;
+    void getHostRuntimeStore()
+      .prepareAgentTimeline(serverId, agentId)
+      .catch(() => undefined);
+  }, [agentId, serverId]);
+  useLayoutEffect(() => {
+    if (!agentId || !viewedTimelineSync) return;
+    viewedTimelineSync.replaceVisibleAgentIds(sourceId, [agentId]);
+    return () => viewedTimelineSync.replaceVisibleAgentIds(sourceId, []);
+  }, [agentId, sourceId, viewedTimelineSync]);
+}
+
+/**
+ * Leaves the sheet the calling pane is shown in, if any, on the way to `destination`. Answers
+ * whether closing the sheet already lands there, so the caller navigates only when it does not.
+ */
+export function useLeaveSheet(): (destination: WorkspaceTabTarget) => boolean {
+  const exit = useContext(SheetPaneExitContext);
+  return useCallback(
+    (destination) => {
+      if (!exit) return false;
+      exit.close();
+      return exit.opener !== null && workspaceTabTargetsEqual(exit.opener, destination);
+    },
+    [exit],
+  );
+}
+
+const styles = StyleSheet.create({
+  pane: {
+    flex: 1,
+    minHeight: 0,
+  },
+  body: {
+    flex: 1,
+    minHeight: 0,
+  },
+});
@@ -1,131 +1,62 @@
-import type { BottomSheetHandleProps } from "@gorhom/bottom-sheet";
 import { useIsFocused } from "expo-router/react-navigation";
+import { useCallback, useEffect, useRef } from "react";
 import {
-  type ComponentType,
-  type FC,
-  useCallback,
-  useEffect,
-  useMemo,
-  useRef,
-  useState,
-} from "react";
-import { View } from "react-native";
-import { useTranslation } from "react-i18next";
-import { useSafeAreaInsets } from "react-native-safe-area-context";
-import { StyleSheet, withUnistyles } from "react-native-unistyles";
-import { useStore } from "zustand";
-import { createStore } from "zustand/vanilla";
-import { Maximize2 } from "lucide-react-native";
-import {
+  FULL_SHEET_SNAP_POINTS,
  SheetBackground,
  SheetHandle,
-  SheetHeaderIconButton,
-  SheetHeaderView,
-  type SheetHeader,
 } from "@/components/adaptive-modal-sheet";
 import {
  IsolatedBottomSheetModal,
  type IsolatedBottomSheetModalRef,
  systemBackPress,
 } from "@/components/ui/isolated-bottom-sheet-modal";
-import type { PanelIconProps } from "@/panels/panel-registry";
-import { getPanelRegistration } from "@/panels/panel-registry";
-import { ensurePanelsRegistered } from "@/panels/register-panels";
-import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
 import {
-  WorkspacePaneContent,
-  type WorkspacePaneContentModel,
-} from "@/screens/workspace/workspace-pane-content";
+  SheetPane,
+  useSheetPaneBridge,
+  useSheetPaneHost,
+  useSheetPaneHostIfAny,
+} from "@/screens/workspace/sheet-pane";
 import { useWorkspaceLayoutStore, type SheetTab } from "@/stores/workspace-layout-store";
-import { useWorkspaceSheetEnvironment } from "./workspace-sheet-environment";

-const SNAP_POINTS = ["92%"];
 const NO_SHEETS: readonly SheetTab[] = [];

-function PanelIcon({
-  icon: Icon,
-  size,
-  color,
-}: { icon: ComponentType<PanelIconProps> } & PanelIconProps) {
-  return <Icon size={size} color={color} />;
-}
-
-const ThemedPanelIcon = withUnistyles(PanelIcon, (theme) => ({
-  color: theme.colors.foregroundMuted,
-}));
-
-interface SheetTabHandleValue {
-  header: SheetHeader;
-  onClose: () => void;
-}
-
-/**
- * The sheet's handle, showing its header. Gorhom takes `handleComponent` as a component type and
- * renders it on the far side of the portal: a new function per render would remount the header on
- * every change, and no context from here reaches it. So each sheet gets one handle component for
- * its lifetime, which reads the header through a store the sheet keeps current.
- */
-function useSheetTabHandle(value: SheetTabHandleValue): FC<BottomSheetHandleProps> {
-  const [store] = useState(() => createStore<SheetTabHandleValue>(() => value));
-  useEffect(() => store.setState(value, true), [store, value]);
-  const [Handle] = useState(
-    () =>
-      function SheetTabHandle(props: BottomSheetHandleProps) {
-        const { header, onClose } = useStore(store);
-        return (
-          <SheetHandle {...props}>
-            <SheetHeaderView header={header} onClose={onClose} testID="sheet-tab-header" />
-          </SheetHandle>
-        );
-      },
-  );
-  return Handle;
-}
-
 export interface SheetTabsProps {
-  workspaceKey: string | null;
-  serverId: string;
-  workspaceId: string;
-  isWorkspaceFocused: boolean;
-  buildContent: (tab: WorkspaceTabDescriptor) => WorkspacePaneContentModel;
  /** The workspace's ordinary tab close, including its unsaved-changes guard. */
  onCloseTab: (tabId: string) => Promise<void>;
 }

-interface SheetTabSheetProps extends Omit<SheetTabsProps, "workspaceKey" | "onCloseTab"> {
+interface SheetTabSheetProps {
  sheet: SheetTab;
-  /** Only the top sheet's pane is focused and answers Android Back; the ones below wait their turn. */
+  /** Only the top sheet answers Android Back; the ones below wait their turn. */
  isTop: boolean;
  /** Runs the guarded close and resolves to whether the tab is still open. */
  onClose: (tabId: string) => Promise<boolean>;
-  onOpenAsTab: (tabId: string) => void;
 }

 /**
 * The workspace's sheet tabs, one sheet each, on the app-wide sheet stack. Their environment
- * crosses into the app overlay host so compact sheets cover both sidebars, and a
- * sheet opened from any other sheet (a subagent chosen from the subagents list, say) lands on top of
- * it and uncovers it on close. The shared sheet parts (`SheetBackground`, `SheetHandle`,
- * `SheetHeaderView`) keep them looking and dragging like every other sheet.
+ * crosses into the app overlay host so compact sheets cover both sidebars, and a sheet opened
+ * from another one lands on top of it and uncovers it on close.
 */
-export function SheetTabs({ workspaceKey, onCloseTab, ...rest }: SheetTabsProps) {
-  const sheets = useWorkspaceLayoutStore((state) =>
-    workspaceKey ? (state.sheetsByWorkspace[workspaceKey] ?? NO_SHEETS) : NO_SHEETS,
-  );
-  const openSheetAsTab = useWorkspaceLayoutStore((state) => state.openSheetAsTab);
-  const handleOpenAsTab = useCallback(
-    (tabId: string) => {
-      if (workspaceKey) openSheetAsTab(workspaceKey, tabId);
-    },
-    [openSheetAsTab, workspaceKey],
+export function SheetTabs({ onCloseTab }: SheetTabsProps) {
+  const host = useSheetPaneHostIfAny();
+  return host ? (
+    <WorkspaceSheetTabs workspaceKey={host.workspaceKey} onCloseTab={onCloseTab} />
+  ) : null;
+}
+
+function WorkspaceSheetTabs({
+  workspaceKey,
+  onCloseTab,
+}: SheetTabsProps & { workspaceKey: string }) {
+  const sheets = useWorkspaceLayoutStore(
+    (state) => state.sheetsByWorkspace[workspaceKey] ?? NO_SHEETS,
  );
  const handleClose = useCallback(
    async (tabId: string) => {
      await onCloseTab(tabId);
      // A declined unsaved-changes prompt leaves the tab in its sheet.
-      const open = workspaceKey
-        ? useWorkspaceLayoutStore.getState().sheetsByWorkspace[workspaceKey]
-        : undefined;
+      const open = useWorkspaceLayoutStore.getState().sheetsByWorkspace[workspaceKey];
      return open?.some((sheet) => sheet.tab.tabId === tabId) ?? false;
    },
    [onCloseTab, workspaceKey],
@@ -136,42 +67,21 @@ export function SheetTabs({ workspaceKey, onCloseTab, ...rest }: SheetTabsProps)
        <SheetTabSheet
          // Keyed by tab id and kind, so the registration and its descriptor hook stay fixed.
          key={`${sheet.tab.tabId}:${sheet.tab.target.kind}`}
-          {...rest}
          sheet={sheet}
          isTop={index === sheets.length - 1}
          onClose={handleClose}
-          onOpenAsTab={handleOpenAsTab}
        />
      ))}
    </>
  );
 }

-function SheetTabSheet({
-  sheet,
-  isTop,
-  serverId,
-  workspaceId,
-  isWorkspaceFocused,
-  buildContent,
-  onClose,
-  onOpenAsTab,
-}: SheetTabSheetProps) {
-  const { t } = useTranslation();
+function SheetTabSheet({ sheet, isTop, onClose }: SheetTabSheetProps) {
  const { tab } = sheet;
  const sheetRef = useRef<IsolatedBottomSheetModalRef>(null);
  const isScreenFocused = useIsFocused();
-  const contextBridge = useWorkspaceSheetEnvironment();
-  ensurePanelsRegistered();
-  const registration = getPanelRegistration(tab.target.kind);
-  if (!registration) {
-    throw new Error(`No panel registration for kind: ${tab.target.kind}`);
-  }
-  const descriptor = registration.useDescriptor(tab.target as never, {
-    serverId,
-    workspaceId,
-    tabId: tab.tabId,
-  });
+  const { isWorkspaceFocused } = useSheetPaneHost();
+  const contextBridge = useSheetPaneBridge();

  // The sheet lives as long as its store entry: it presents on mount, and unmounting takes it off
  // the stack, which uncovers the sheet below. Gorhom slides an unmounting sheet down and still
@@ -209,105 +119,23 @@ function SheetTabSheet({
    });
  }, [close, ownsBackPress]);

-  const handleOpenAsTab = useCallback(() => onOpenAsTab(tab.tabId), [onOpenAsTab, tab.tabId]);
-  const header = useMemo<SheetHeader>(
-    () => ({
-      title: descriptor.label,
-      leading: <ThemedPanelIcon icon={descriptor.icon} size={16} />,
-      // The sheet is for looking; the full-screen glyph takes the tab out of the sheet and into
-      // the switcher, where it gets its composer back.
-      actions: sheet.policy.openAsTab ? (
-        <SheetHeaderIconButton
-          icon={Maximize2}
-          accessibilityLabel={t("workspace.sheet.openAsTab")}
-          onPress={handleOpenAsTab}
-          testID="sheet-tab-open-as-tab"
-        />
-      ) : undefined,
-    }),
-    [descriptor.icon, descriptor.label, handleOpenAsTab, sheet.policy.openAsTab, t],
-  );
-  const handleValue = useMemo<SheetTabHandleValue>(
-    () => ({ header, onClose: close }),
-    [close, header],
-  );
-  // The header is the sheet's handle: the panel scrolls on its own, so dragging the content would
-  // fight it, and the header is where people reach to pull the sheet down.
-  const SheetTabHandle = useSheetTabHandle(handleValue);
-
  return (
    <IsolatedBottomSheetModal
      ref={sheetRef}
      contextBridge={contextBridge}
-      snapPoints={SNAP_POINTS}
+      snapPoints={FULL_SHEET_SNAP_POINTS}
      enableDynamicSizing={false}
      enablePanDownToClose
+      // The pane scrolls on its own; the sheet drags from its handle and header.
      enableContentPanningGesture={false}
      enableDismissOnClose={false}
      backgroundComponent={SheetBackground}
-      handleComponent={SheetTabHandle}
+      handleComponent={SheetHandle}
      backdropOpacity={0.45}
      onChange={handleChange}
      accessible={false}
    >
-      {/* A covered sheet stays as live as the pane under it; only focus follows the top sheet. */}
-      <SheetTabBody
-        tab={tab}
-        label={descriptor.label}
-        isPaneFocused={isTop && isWorkspaceFocused}
-        isWorkspaceFocused={isWorkspaceFocused}
-        buildContent={buildContent}
-      />
+      <SheetPane sheet={sheet} onClose={close} isTop={isTop} />
    </IsolatedBottomSheetModal>
  );
 }
-
-function SheetTabBody({
-  tab,
-  label,
-  isPaneFocused,
-  isWorkspaceFocused,
-  buildContent,
-}: {
-  tab: SheetTab["tab"];
-  label: string;
-  /** Only the top sheet's pane is focused; the ones below are covered. */
-  isPaneFocused: boolean;
-  isWorkspaceFocused: boolean;
-  buildContent: (tab: WorkspaceTabDescriptor) => WorkspacePaneContentModel;
-}) {
-  const tabDescriptor = useMemo<WorkspaceTabDescriptor>(
-    () => ({
-      key: tab.tabId,
-      tabId: tab.tabId,
-      kind: tab.target.kind,
-      target: tab.target,
-      state: tab.state,
-    }),
-    [tab],
-  );
-  const content = useMemo(() => buildContent(tabDescriptor), [buildContent, tabDescriptor]);
-  // The sheet reaches the bottom of the screen, so it owns the system navigation inset.
-  const { bottom: bottomInset } = useSafeAreaInsets();
-  const contentStyle = useMemo(
-    () => [styles.content, { paddingBottom: bottomInset }],
-    [bottomInset],
-  );
-
-  return (
-    <View style={contentStyle} role="dialog" aria-label={label} testID="sheet-tab-body">
-      <WorkspacePaneContent
-        content={content}
-        isWorkspaceFocused={isWorkspaceFocused}
-        isPaneFocused={isPaneFocused}
-      />
-    </View>
-  );
-}
-
-const styles = StyleSheet.create({
-  content: {
-    flex: 1,
-    minHeight: 0,
-  },
-});
@@ -111,28 +111,6 @@ test("pane retargeting replaces the viewed agent and duplicate panes collapse to
  }).toEqual({ duplicate: ["agent-a"], retargeted: ["agent-a", "agent-b"] });
 });

-test("the agent shown in the workspace sheet is viewed alongside the pane under it", () => {
-  const layout: WorkspaceLayout = {
-    focusedPaneId: "main",
-    root: { kind: "pane", pane: { id: "main", tabIds: ["a"], focusedTabId: "a" } },
-  };
-  const tabs: WorkspaceTab[] = [
-    { tabId: "a", target: { kind: "agent", agentId: "agent-a" }, createdAt: 1 },
-  ];
-  const sheetTab: WorkspaceTab = {
-    tabId: "sheet",
-    target: { kind: "agent", agentId: "agent-child" },
-    createdAt: 2,
-  };
-
-  expect(
-    selectVisibleAgentIds({ layout, tabs, sheetTab, routeFocused: true, focusedPaneOnly: true }),
-  ).toEqual(["agent-a", "agent-child"]);
-  expect(
-    selectVisibleAgentIds({ layout, tabs, sheetTab, routeFocused: false, focusedPaneOnly: true }),
-  ).toEqual([]);
-});
-
 test("single-pane tablet includes its visible Explorer agent without including other splits", () => {
  const layout: WorkspaceLayout = {
    focusedPaneId: "main",
@@ -6,8 +6,6 @@ import { deriveWorkspacePaneState } from "./workspace-pane-state";
 export function selectVisibleAgentIds(input: {
  layout: WorkspaceLayout | null;
  tabs: WorkspaceTab[];
-  /** The workspace sheet's tab, shown over the panes. */
-  sheetTab?: WorkspaceTab | null;
  routeFocused: boolean;
  focusedPaneOnly: boolean;
  explorerPaneId?: string | null;
@@ -29,7 +27,6 @@ export function selectVisibleAgentIds(input: {
      .target;
    return target ? [target] : [];
  });
-  if (input.sheetTab) targets.push(input.sheetTab.target);
  return [
    ...new Set(targets.flatMap((target) => (target.kind === "agent" ? [target.agentId] : []))),
  ].sort();
@@ -38,7 +35,6 @@ export function selectVisibleAgentIds(input: {
 export function useVisibleAgentIds(input: {
  layout: WorkspaceLayout | null;
  tabs: WorkspaceTab[];
-  sheetTab: WorkspaceTab | null;
  routeFocused: boolean;
  focusedPaneOnly: boolean;
  explorerPaneId?: string | null;
@@ -11,18 +11,7 @@ import {
 } from "@/screens/workspace/workspace-pane-content";
 import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
 import { usePaneContext, usePaneFocus, type PaneContextValue } from "@/panels/pane-context";
-
-vi.mock("@/panels/register-panels", () => ({
-  ensurePanelsRegistered: vi.fn(),
-}));
-
-vi.mock("@/panels/panel-registry", () => ({
-  getPanelRegistration: () => ({
-    kind: "agent",
-    component: ProbePanel,
-    useDescriptor: vi.fn(),
-  }),
-}));
+import { definePanel, registerPanel } from "@/panels/panel-registry";

 interface ProbeSnapshot {
  paneContextValue: PaneContextValue;
@@ -48,6 +37,18 @@ function ProbePanel() {
  return null;
 }

+// The workspace screen registers the real panels; this probe stands in for each kind the tests open.
+for (const kind of ["agent", "draft"] as const) {
+  registerPanel(
+    definePanel(kind, {
+      component: ProbePanel,
+      useDescriptor: () => {
+        throw new Error("The probe panel has no descriptor");
+      },
+    }),
+  );
+}
+
 const agentTab: WorkspaceTabDescriptor = {
  key: "agent_agent-a",
  tabId: "agent_agent-a",
@@ -9,7 +9,6 @@ import {
 } from "@/panels/pane-context";
 import { useStableEvent } from "@/hooks/use-stable-event";
 import { getPanelRegistration } from "@/panels/panel-registry";
-import { ensurePanelsRegistered } from "@/panels/register-panels";
 import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
 import { RenderProfile } from "@/utils/render-profiler";
 import type { WorkspaceFileOpenRequest } from "@/workspace/file-open";
@@ -56,7 +55,6 @@ export function buildWorkspacePaneContentModel({
  onOpenWorkspaceFile,
  onOpenImportSheet,
 }: BuildWorkspacePaneContentModelInput): WorkspacePaneContentModel {
-  ensurePanelsRegistered();
  const registration = getPanelRegistration(tab.kind);
  invariant(registration, `No panel registration for kind: ${tab.kind}`);
  return {
@@ -180,6 +180,8 @@ import {
  type WorkspacePaneContentModel,
 } from "@/screens/workspace/workspace-pane-content";
 import { useMountedTabSet } from "@/screens/workspace/use-mounted-tab-set";
+import { ensurePanelsRegistered } from "@/panels/register-panels";
+import { SheetPaneHostProvider, type SheetPaneHost } from "@/screens/workspace/sheet-pane";
 import { SheetTabs } from "@/screens/workspace/sheet-tabs";
 import type { PaneHost } from "@/panels/panel-manifest";
 import { WorkspaceFocusProvider } from "@/workspace/focus";
@@ -421,6 +423,10 @@ export const WorkspaceScreen = memo(function WorkspaceScreen({
  workspaceId,
  isRouteFocused,
 }: WorkspaceScreenProps) {
+  // Every reader of the panel registry renders inside the workspace screen, so it registers the
+  // panels before any of them renders. A reader importing the registration instead would import
+  // every panel, and the panels render readers.
+  ensurePanelsRegistered();
  const navigationFocused = useIsFocused();
  useEffect(() => {
    traceInstant("paseo.workspace.mount", { serverId, workspaceId });
@@ -764,13 +770,17 @@ function WorkspaceScreenGateFrame({ children }: { children: ReactNode }) {
 function WorkspaceContentProviders({
  children,
  workspaceKey,
+  sheetPaneHost,
 }: {
  children: ReactNode;
  workspaceKey: string | null;
+  sheetPaneHost: SheetPaneHost | null;
 }) {
  return (
    <WorkspaceFocusProvider workspaceKey={workspaceKey}>
-      <DiffDocumentWorkspaceCacheProvider>{children}</DiffDocumentWorkspaceCacheProvider>
+      <DiffDocumentWorkspaceCacheProvider>
+        <SheetPaneHostProvider value={sheetPaneHost}>{children}</SheetPaneHostProvider>
+      </DiffDocumentWorkspaceCacheProvider>
    </WorkspaceFocusProvider>
  );
 }
@@ -1342,10 +1352,6 @@ function WorkspaceScreenContent({
  const sheets = useWorkspaceLayoutStore((state) =>
    persistenceKey ? (state.sheetsByWorkspace[persistenceKey] ?? NO_SHEETS) : NO_SHEETS,
  );
-  // Only the top sheet is on screen.
-  const sheetTab = useWorkspaceLayoutStore((state) =>
-    persistenceKey ? (state.sheetsByWorkspace[persistenceKey]?.at(-1)?.tab ?? null) : null,
-  );
  const unpinWorkspaceAgent = useWorkspaceLayoutStore((state) => state.unpinAgent);
  const hideWorkspaceAgent = useWorkspaceLayoutStore((state) => state.hideAgent);
  const setWorkspaceTabState = useWorkspaceLayoutStore((state) => state.setTabState);
@@ -1417,7 +1423,6 @@ function WorkspaceScreenContent({
  const visibleAgentIds = useVisibleAgentIds({
    layout: workspaceLayout,
    tabs: uiTabs,
-    sheetTab,
    routeFocused: isRouteFocused,
    focusedPaneOnly: syncFocusedPaneOnly,
    explorerPaneId: explorerSidebarPaneId,
@@ -2916,6 +2921,8 @@ function WorkspaceScreenContent({
      paneId?: string | null;
      focusPaneBeforeOpen?: boolean;
      host?: PaneHost;
+      /** Overrides the guarded tab close, for a host that closes the tab its own way. */
+      onCloseCurrentTab?: () => void;
    }) =>
      buildWorkspacePaneContentModel({
        tab: input.tab,
@@ -2965,9 +2972,11 @@ function WorkspaceScreenContent({
                });
              }
            : undefined,
-        onCloseCurrentTab: () => {
-          void handleCloseTabById(input.tab.tabId);
-        },
+        onCloseCurrentTab:
+          input.onCloseCurrentTab ??
+          (() => {
+            void handleCloseTabById(input.tab.tabId);
+          }),
        onRetargetCurrentTab: (target) => {
          if (!persistenceKey) {
            return;
@@ -3042,16 +3051,36 @@ function WorkspaceScreenContent({
    [buildPaneContentModel],
  );
  const buildSheetPaneContentModel = useCallback(
-    function buildSheetPaneContentModel(tab: WorkspaceTabDescriptor) {
+    function buildSheetPaneContentModel(tab: WorkspaceTabDescriptor, closeCurrentTab: () => void) {
      return buildPaneContentModel({
        tab,
        paneId: null,
        focusPaneBeforeOpen: false,
        host: "sheet",
+        onCloseCurrentTab: closeCurrentTab,
      });
    },
    [buildPaneContentModel],
  );
+  const sheetPaneHost = useMemo<SheetPaneHost | null>(
+    () =>
+      persistenceKey
+        ? {
+            workspaceKey: persistenceKey,
+            serverId: normalizedServerId,
+            workspaceId: normalizedWorkspaceId,
+            isWorkspaceFocused: isRouteFocused,
+            buildContent: buildSheetPaneContentModel,
+          }
+        : null,
+    [
+      buildSheetPaneContentModel,
+      isRouteFocused,
+      normalizedServerId,
+      normalizedWorkspaceId,
+      persistenceKey,
+    ],
+  );
  const handleFocusPane = useStableEvent(function handleFocusPane(paneId: string) {
    if (!persistenceKey || paneFocusSuppressedRef.current) {
      return;
@@ -3540,14 +3569,7 @@ function WorkspaceScreenContent({
          </StreamTopOverlayProvider>
        )}
      </FloatingHeaderLayout>
-      <SheetTabs
-        workspaceKey={persistenceKey}
-        serverId={normalizedServerId}
-        workspaceId={normalizedWorkspaceId}
-        isWorkspaceFocused={isRouteFocused}
-        buildContent={buildSheetPaneContentModel}
-        onCloseTab={handleCloseTabById}
-      />
+      <SheetTabs onCloseTab={handleCloseTabById} />
    </View>
  ) : (
    <View style={styles.centerColumn}>
@@ -3767,7 +3789,11 @@ function WorkspaceScreenContent({
    return gatedWorkspaceScreen;
  }
  return (
-    <WorkspaceContentProviders key={persistenceKey} workspaceKey={persistenceKey}>
+    <WorkspaceContentProviders
+      key={persistenceKey}
+      workspaceKey={persistenceKey}
+      sheetPaneHost={sheetPaneHost}
+    >
      <AssistantFileLinkResolverProvider
        client={client}
        serverId={normalizedServerId}
@@ -1,38 +0,0 @@
-import React, { useCallback, useContext } from "react";
-import { NavigationContext, NavigationRouteContext } from "expo-router/react-navigation";
-import { useAssistantFileLinkEnvironmentBridge } from "@/assistant-file-links";
-import { useComposerEditingEnvironmentBridge } from "@/composer/editing-session";
-import { RetainedPanelActivity, useRetainedPanelActive } from "@/components/retained-panel";
-import type { ContextBridge } from "@/components/ui/isolated-bottom-sheet-modal";
-import { useDiffDocumentWorkspaceCacheBridge } from "@/git/diff-document/workspace-cache";
-import { HostRouteProvider, useHostRouteServerId } from "@/navigation/host-route-context";
-
-/** The environment of the built-in compact panels; pane identity is supplied by their body. */
-export function useWorkspaceSheetEnvironment(): ContextBridge {
-  const editing = useComposerEditingEnvironmentBridge();
-  const cache = useDiffDocumentWorkspaceCacheBridge();
-  const files = useAssistantFileLinkEnvironmentBridge();
-  const active = useRetainedPanelActive();
-  const serverId = useHostRouteServerId();
-  const navigation = useContext(NavigationContext);
-  const route = useContext(NavigationRouteContext);
-  return useCallback(
-    (children) => {
-      const content = editing(cache(files(children)));
-      return (
-        <NavigationContext.Provider value={navigation}>
-          <NavigationRouteContext.Provider value={route}>
-            <RetainedPanelActivity active={active}>
-              {serverId ? (
-                <HostRouteProvider serverId={serverId}>{content}</HostRouteProvider>
-              ) : (
-                content
-              )}
-            </RetainedPanelActivity>
-          </NavigationRouteContext.Provider>
-        </NavigationContext.Provider>
-      );
-    },
-    [editing, cache, files, active, serverId, navigation, route],
-  );
-}
@@ -6,7 +6,6 @@ import { Check } from "lucide-react-native";
 import { StyleSheet, withUnistyles } from "react-native-unistyles";
 import { useTranslation } from "react-i18next";
 import invariant from "tiny-invariant";
-import { ensurePanelsRegistered } from "@/panels/register-panels";
 import { getPanelRegistration, type PanelIconProps } from "@/panels/panel-registry";
 import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
 import type { SidebarStateBucket } from "@/utils/sidebar-agent-state";
@@ -43,7 +42,6 @@ export function WorkspaceTabPresentationResolver({
  workspaceId,
  children,
 }: WorkspaceTabPresentationResolverProps): ReactElement {
-  ensurePanelsRegistered();
  const registration = getPanelRegistration(tab.kind);
  invariant(registration, `No panel registration for kind: ${tab.kind}`);

@@ -41,6 +41,7 @@ import {
  normalizeLayout,
  removePaneFromTree,
  removeTabFromTree,
+  selectSheetTab,
  stripEphemeralTabsFromLayout,
  type SplitNode,
  type SplitPane,
@@ -4496,6 +4497,12 @@ describe("compact workspace sheet", () => {
    return store.getState().sheetsByWorkspace[workspaceKey]?.at(-1);
  }

+  function requireTopSheet(store: ReturnType<typeof createCompactStore>) {
+    const sheet = topSheet(store);
+    if (!sheet) throw new Error("Expected a sheet");
+    return sheet;
+  }
+
  function sheetTargets(store: ReturnType<typeof createCompactStore>) {
    return (store.getState().sheetsByWorkspace[workspaceKey] ?? []).map(
      (sheet) => sheet.tab.target,
@@ -4647,7 +4654,7 @@ describe("compact workspace sheet", () => {
      .getState()
      .openTab({ workspaceKey, target: { kind: "file", path: "src/other.ts" }, intent: "reveal" });

-    store.getState().openSheetAsTab(workspaceKey, nextTabId ?? "");
+    store.getState().openTabInFront(workspaceKey, requireTopSheet(store));

    expect(sheetTargets(store)).toEqual([]);
    expect(tabKinds(store)).toEqual(["terminal", "file"]);
@@ -4683,7 +4690,7 @@ describe("compact workspace sheet", () => {
    if (!sheetTabId) throw new Error("Expected a sheet tab");
    store.getState().setTabState(workspaceKey, sheetTabId, { scrollTop: 120 });

-    const tabId = store.getState().openSheetAsTab(workspaceKey, sheetTabId);
+    const tabId = store.getState().openTabInFront(workspaceKey, requireTopSheet(store));

    expect(tabId).toBe(sheetTabId);
    expect(topSheet(store)).toBeUndefined();
@@ -4787,6 +4794,40 @@ describe("compact workspace sheet", () => {
    expect(tabKinds(store)).toEqual(["terminal", "agent", "agent"]);
  });

+  it("describes the sheet a reveal would show without opening it, and opens it as a tab", () => {
+    seedAgents([
+      { id: "root", parentAgentId: null, workspaceId: "sheet-ws" },
+      { id: "child", parentAgentId: "root", workspaceId: "sheet-ws" },
+    ]);
+    const store = createCompactStore();
+    const rootTabId = store
+      .getState()
+      .openTab({ workspaceKey, target: { kind: "agent", agentId: "root" }, intent: "reveal" });
+
+    const sheet = selectSheetTab(store.getState(), {
+      workspaceKey,
+      target: { kind: "agent", agentId: "child" },
+      parentTabId: rootTabId ?? undefined,
+    });
+    expect(sheet?.parentTabId).toBe(rootTabId);
+    expect(
+      selectSheetTab(store.getState(), {
+        workspaceKey,
+        target: { kind: "agent", agentId: "root" },
+      }),
+    ).toBeNull();
+    expect(topSheet(store)).toBeUndefined();
+    if (!sheet) throw new Error("Expected a sheet tab");
+
+    const tabId = store.getState().openTabInFront(workspaceKey, sheet);
+
+    expect(tabId).toBe(sheet.tab.tabId);
+    expect(topSheet(store)).toBeUndefined();
+    const layout = store.getState().layoutByWorkspace[workspaceKey];
+    expect(findPaneById(layout.root, "main")?.focusedTabId).toBe(tabId);
+    expect(layout.parentTabIdByTabId?.[tabId ?? ""]).toBe(rootTabId);
+  });
+
  it("gives a sheet target opened from inside the sheet the sheet's own parent", () => {
    seedAgents([
      { id: "root", parentAgentId: null, workspaceId: "sheet-ws" },
@@ -4811,7 +4852,7 @@ describe("compact workspace sheet", () => {
    });
    expect(topSheet(store)?.parentTabId).toBe(rootTabId);

-    store.getState().openSheetAsTab(workspaceKey, fileSheetTabId ?? "");
+    store.getState().openTabInFront(workspaceKey, requireTopSheet(store));
    const layout = store.getState().layoutByWorkspace[workspaceKey];
    expect(layout.parentTabIdByTabId?.[fileSheetTabId ?? ""]).toBe(rootTabId);
  });
@@ -156,13 +156,12 @@ interface WorkspaceLayoutStore {
   * `compactSheet` opens in a sheet; the returned tab id is the sheet tab's id.
   */
  openTab: (input: OpenWorkspaceTabInput) => string | null;
-  /** Whether `openTab` with this input would show the target in a sheet. */
-  opensInSheet: (
-    input: Pick<OpenWorkspaceTabInput, "workspaceKey" | "target" | "intent">,
-  ) => boolean;
  setLayoutMode: (mode: WorkspaceLayoutMode) => void;
-  /** Moves a sheet's tab, keeping its tab id, into the focused pane. */
-  openSheetAsTab: (workspaceKey: string, tabId: string) => string | null;
+  /**
+   * Moves a sheet's tab, keeping its tab id, into the focused pane and dismisses the sheets that
+   * would cover it. The sheet need not be one of the workspace's sheet tabs.
+   */
+  openTabInFront: (workspaceKey: string, sheet: SheetTab) => string | null;
  /** Placement resolves lazily so an already acknowledged workspace never creates a side pane. */
  autoOpenPullRequestTab: (
    workspaceKey: string,
@@ -521,6 +520,29 @@ export function selectExplorerSidebarPaneId(
  return resolveExplorerSidebarPaneId(layout, state.explorerSidebarPaneIdByWorkspace[workspaceKey]);
 }

+/**
+ * The sheet tab a reveal of this target would show, or null when it opens as a tab. A caller
+ * that hosts the sheet itself (a list showing it in place) renders this without opening it.
+ */
+export function selectSheetTab(
+  state: Pick<WorkspaceLayoutStore, "layoutMode" | "layoutByWorkspace" | "sheetsByWorkspace">,
+  input: Pick<OpenWorkspaceTabInput, "workspaceKey" | "target" | "parentTabId">,
+): SheetTab | null {
+  const workspaceKey = trimNonEmpty(input.workspaceKey);
+  const target = normalizeWorkspaceTabTarget(input.target);
+  if (!workspaceKey || !target) return null;
+  const policy = resolveSheetPolicy(state, workspaceKey, target, "reveal");
+  if (!policy) return null;
+  return placeTargetInSheet({
+    kept: undefined,
+    target,
+    intent: "reveal",
+    policy,
+    parentTabId: resolveOpenParentTabId(state, workspaceKey, input.parentTabId),
+    state: undefined,
+  });
+}
+
 /** A workspace's panes give up keyboard focus while focus is parked or the sheet covers them. */
 export function selectPaneFocusSuspended(
  state: Pick<WorkspaceLayoutStore, "focusRestorationByWorkspace" | "sheetsByWorkspace">,
@@ -822,10 +844,8 @@ function placeTargetInSheet(input: {
 function promoteSheetToTab(
  state: WorkspaceLayoutStore,
  workspaceKey: string,
-  tabId: string,
+  sheet: SheetTab,
 ): { tabId: string; patch: Partial<WorkspaceLayoutStore> } | null {
-  const sheet = findSheet(state, workspaceKey, tabId);
-  if (!sheet) return null;
  const { tab } = sheet;
  const placement = getOpenTabPlacement(state, workspaceKey, tab.target, FOCUSED_PANE_PLACEMENT);
  const input = {
@@ -910,9 +930,9 @@ function dismissSheets(
 function openSheetTabInFront(
  state: WorkspaceLayoutStore,
  workspaceKey: string,
-  tabId: string,
+  sheet: SheetTab,
 ): { tabId: string; patch: Partial<WorkspaceLayoutStore> } | null {
-  const promoted = promoteSheetToTab(state, workspaceKey, tabId);
+  const promoted = promoteSheetToTab(state, workspaceKey, sheet);
  if (!promoted) return null;
  const next = { ...state, ...promoted.patch };
  return {
@@ -1208,15 +1228,6 @@ export function createWorkspaceLayoutStore(
          }));
          return result.tabId;
        },
-        opensInSheet: (input) => {
-          const normalizedWorkspaceKey = trimNonEmpty(input.workspaceKey);
-          const normalizedTarget = normalizeWorkspaceTabTarget(input.target);
-          if (!normalizedWorkspaceKey || !normalizedTarget) return false;
-          return (
-            resolveSheetPlacement(get(), normalizedWorkspaceKey, normalizedTarget, input.intent) !==
-            null
-          );
-        },
        setLayoutMode: (mode) => {
          set((state) => {
            if (state.layoutMode === mode) return state;
@@ -1225,7 +1236,7 @@ export function createWorkspaceLayoutStore(
            const next: WorkspaceLayoutStore = { ...state, layoutMode: mode };
            for (const [workspaceKey, sheets] of Object.entries(state.sheetsByWorkspace)) {
              for (const sheet of sheets) {
-                const promoted = promoteSheetToTab(next, workspaceKey, sheet.tab.tabId);
+                const promoted = promoteSheetToTab(next, workspaceKey, sheet);
                Object.assign(
                  next,
                  promoted?.patch ?? withoutSheet(next, workspaceKey, sheet.tab.tabId),
@@ -1235,11 +1246,10 @@ export function createWorkspaceLayoutStore(
            return next;
          });
        },
-        openSheetAsTab: (workspaceKey, tabId) => {
+        openTabInFront: (workspaceKey, sheet) => {
          const normalizedWorkspaceKey = trimNonEmpty(workspaceKey);
-          const normalizedTabId = trimNonEmpty(tabId);
-          if (!normalizedWorkspaceKey || !normalizedTabId) return null;
-          const promoted = openSheetTabInFront(get(), normalizedWorkspaceKey, normalizedTabId);
+          if (!normalizedWorkspaceKey) return null;
+          const promoted = openSheetTabInFront(get(), normalizedWorkspaceKey, sheet);
          if (!promoted) return null;
          set(promoted.patch);
          return promoted.tabId;
@@ -1569,7 +1579,10 @@ export function createWorkspaceLayoutStore(
              return normalizedTabId;
            }
            // A target sheets do not host becomes the tab it would have opened as.
-            const promoted = openSheetTabInFront(next, normalizedWorkspaceKey, normalizedTabId);
+            const retargeted = findSheet(next, normalizedWorkspaceKey, normalizedTabId);
+            const promoted = retargeted
+              ? openSheetTabInFront(next, normalizedWorkspaceKey, retargeted)
+              : null;
            set(promoted?.patch ?? withoutSheet(next, normalizedWorkspaceKey, normalizedTabId));
            return promoted?.tabId ?? null;
          }
@@ -6,8 +6,7 @@ StyleSheet.configure({
  breakpoints: {
    xs: 0,
    sm: 576,
-    medium: 600,
-    md: 720,
+    md: 600,
    lg: 992,
    xl: 1200,
  },
@@ -22,7 +21,6 @@ type AppThemes = typeof REGISTERED_THEMES;
 interface AppBreakpoints {
  xs: number;
  sm: number;
-  medium: number;
  md: number;
  lg: number;
  xl: number;
@@ -9,4 +9,4 @@ export {
  type ArchiveFinishedStatus,
  type UseArchiveFinishedSubagentsInput,
 } from "./use-archive-finished";
-export { useSubagentOpensInSheet } from "./opens-in-sheet";
+export { useSubagentSheetTab } from "./sheet-tab";
@@ -1,29 +0,0 @@
-import { useWorkspaceLayoutStore } from "@/stores/workspace-layout-store";
-import type { WorkspaceTabTarget } from "@/workspace-tabs/model";
-import type { SubagentRow } from "./select";
-
-/** The workspace target a subagent row opens. */
-export function subagentRowTarget(row: SubagentRow): WorkspaceTabTarget {
-  return row.kind === "provider"
-    ? { kind: "provider_subagent", parentAgentId: row.parentAgentId, subagentId: row.id }
-    : { kind: "agent", agentId: row.id };
-}
-
-/** Answers, per subagent row, whether opening it in this workspace shows a sheet rather than a tab. */
-export function useSubagentOpensInSheet(
-  workspaceKey: string | null,
-): (row: SubagentRow) => boolean {
-  // The rows render the answer, so this subscribes to what the answer reads: the layout mode and
-  // the workspace's tabs. A subagent already open as a tab reveals that tab instead of a sheet,
-  // and a row rendered while that tab existed must re-render once it closes, or choosing the row
-  // would still close the list it sits in.
-  useWorkspaceLayoutStore((state) => state.layoutMode);
-  useWorkspaceLayoutStore((state) =>
-    workspaceKey ? state.layoutByWorkspace[workspaceKey] : undefined,
-  );
-  return (row) =>
-    workspaceKey !== null &&
-    useWorkspaceLayoutStore
-      .getState()
-      .opensInSheet({ workspaceKey, target: subagentRowTarget(row), intent: "reveal" });
-}
@@ -3,8 +3,8 @@ import { Text, View } from "react-native";
 import { useTranslation } from "react-i18next";
 import { CornerUpLeft } from "lucide-react-native";
 import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import { StatusIcon } from "@/components/status-icon";
 import { Button } from "@/components/ui/button";
-import { ComposerTrackMark } from "@/composer/tracks";
 import { FOOTER_HEIGHT } from "@/constants/layout";
 import type { Theme } from "@/styles/theme";
 import { useParentAgent, type ParentAgent } from "./use-parent-agent";
@@ -22,6 +22,7 @@ function ParentIcon({
 }

 const ThemedParentIcon = withUnistyles(ParentIcon);
+const ICON_SIZE = 16;
 const foregroundColorMapping = (theme: Theme) => ({ color: theme.colors.foreground });

 /** Stands in the composer's place on a subagent shown without one: who the parent is, and the way back. */
@@ -38,18 +39,12 @@ export function ParentAgentCallout({
  return (
    <View style={styles.rail}>
      <View style={styles.callout} testID="parent-agent-callout">
-        <View style={styles.avatar}>
-          <ThemedParentIcon icon={parent.icon} size={18} uniProps={foregroundColorMapping} />
-        </View>
-        <View style={styles.body}>
-          <Text style={styles.eyebrow}>{t("subagents.parent.parent")}</Text>
-          <View style={styles.titleRow}>
-            <Text style={styles.title} numberOfLines={1}>
-              {parent.label ?? t("subagents.parent.parentAgent")}
-            </Text>
-            <ComposerTrackMark bucket={parent.statusBucket} />
-          </View>
-        </View>
+        <StatusIcon statusBucket={parent.statusBucket} size={ICON_SIZE} backdrop="surface1">
+          <ThemedParentIcon icon={parent.icon} size={ICON_SIZE} uniProps={foregroundColorMapping} />
+        </StatusIcon>
+        <Text style={styles.title} numberOfLines={1}>
+          {parent.label ?? t("subagents.parent.parentAgent")}
+        </Text>
        <Button
          size="sm"
          variant="secondary"
@@ -65,11 +60,13 @@ export function ParentAgentCallout({
 }

 const styles = StyleSheet.create((theme) => ({
+  // The composer's rail, so the callout sits where the composer would.
  rail: {
    minHeight: FOOTER_HEIGHT,
    alignItems: "center",
    width: "100%",
-    padding: theme.spacing[4],
+    paddingHorizontal: theme.spacing[4],
+    paddingBottom: theme.spacing[4],
  },
  callout: {
    width: "100%",
@@ -84,31 +81,10 @@ const styles = StyleSheet.create((theme) => ({
    padding: theme.spacing[3],
    paddingRight: { xs: theme.spacing[3], md: theme.spacing[4] },
  },
-  avatar: {
-    width: 36,
-    height: 36,
-    borderRadius: theme.borderRadius.lg,
-    backgroundColor: theme.colors.surface2,
-    alignItems: "center",
-    justifyContent: "center",
-  },
-  body: {
+  // Shrinks before the button does, so Open parent never wraps or leaves the row.
+  title: {
    flex: 1,
    minWidth: 0,
-    gap: theme.spacing[0.5],
-  },
-  eyebrow: {
-    fontSize: theme.fontSize.sm,
-    color: theme.colors.foregroundMuted,
-  },
-  titleRow: {
-    flexDirection: "row",
-    alignItems: "center",
-    gap: theme.spacing[2],
-    minWidth: 0,
-  },
-  title: {
-    flexShrink: 1,
    fontSize: theme.fontSize.base,
    fontWeight: theme.fontWeight.medium,
    color: theme.colors.foreground,
@@ -1,6 +1,7 @@
 import { useCallback } from "react";
 import { useAgentDescriptor } from "@/agent-presentation";
 import type { PanelDescriptor } from "@/panels/panel-registry";
+import { useLeaveSheet } from "@/screens/workspace/sheet-pane";
 import { useSessionStore } from "@/stores/session-store";
 import type { SidebarStateBucket } from "@/utils/sidebar-agent-state";
 import { navigateToAgent } from "@/utils/navigate-to-agent";
@@ -25,10 +26,14 @@ export function useParentAgentId(serverId: string, agentId: string): string | nu
 /** The parent as its own tab presents it, and the way back to it. */
 export function useParentAgent(serverId: string, parentAgentId: string): ParentAgent {
  const descriptor = useAgentDescriptor({ kind: "agent", agentId: parentAgentId }, { serverId });
-  // The parent may live in another workspace; navigateToAgent opens it wherever it is.
+  const leaveSheet = useLeaveSheet();
+  // Going back to the parent leaves the sheet the child is shown in. When the child was chosen
+  // from the parent's list, closing the sheet already uncovers the parent; otherwise the parent
+  // may live anywhere, even another workspace, and navigateToAgent opens it wherever it is.
  const open = useCallback(() => {
+    if (leaveSheet({ kind: "agent", agentId: parentAgentId })) return;
    navigateToAgent({ serverId, agentId: parentAgentId });
-  }, [parentAgentId, serverId]);
+  }, [leaveSheet, parentAgentId, serverId]);
  return {
    label: descriptor.label || null,
    icon: descriptor.icon,
@@ -9,7 +9,7 @@ import { useSessionStore, type Agent } from "@/stores/session-store";
 import { normalizeAgentSnapshot, projectAgentSnapshot } from "@/utils/agent-snapshots";
 import { useWorkspaceLayoutStore } from "@/stores/workspace-layout-store";
 import { buildWorkspaceTabPersistenceKey } from "@/workspace-tabs/model";
-import { useSubagentOpensInSheet } from "./opens-in-sheet";
+import { useSubagentSheetTab } from "./sheet-tab";
 import { selectSubagentsForParent, type SubagentRow } from "./select";

 vi.mock("@react-native-async-storage/async-storage", () => {
@@ -116,28 +116,40 @@ afterEach(() => {
  });
 });

-describe("useSubagentOpensInSheet", () => {
-  it("re-renders the row's answer as the child's tab opens and closes", () => {
+describe("useSubagentSheetTab", () => {
+  it("re-renders the row's sheet as the child's tab opens and closes", () => {
    const row = seedParentWithChild();
    const store = useWorkspaceLayoutStore.getState();
    store.setLayoutMode("compact");
-    const target = { kind: "agent", agentId: "child" } as const;

    // The row renders its answer, as the track does, so a stale render is a stale answer.
-    const { result } = renderHook(() => useSubagentOpensInSheet(workspaceKey)(row));
-    expect(result.current).toBe(true);
+    const { result } = renderHook(() => useSubagentSheetTab(workspaceKey, "parent-tab")(row));
+    expect(result.current?.tab.target).toEqual({ kind: "agent", agentId: "child" });

    let tabId: string | null = null;
    act(() => {
-      const sheetTabId = store.openTab({ workspaceKey, target, intent: "reveal" });
-      tabId = sheetTabId ? store.openSheetAsTab(workspaceKey, sheetTabId) : null;
+      tabId = result.current ? store.openTabInFront(workspaceKey, result.current) : null;
    });
    expect(tabId).not.toBeNull();
-    expect(result.current).toBe(false);
+    expect(result.current).toBeNull();

    act(() => {
      store.closeTab(workspaceKey, tabId ?? "");
    });
-    expect(result.current).toBe(true);
+    expect(result.current?.tab.tabId).toBe(tabId);
+  });
+
+  it("hands a re-rendered row the same sheet", () => {
+    const row = seedParentWithChild();
+    useWorkspaceLayoutStore.getState().setLayoutMode("compact");
+
+    const { result, rerender } = renderHook(() =>
+      useSubagentSheetTab(workspaceKey, "parent-tab")(row),
+    );
+    const first = result.current;
+    rerender();
+
+    expect(first).not.toBeNull();
+    expect(result.current).toBe(first);
  });
 });
@@ -0,0 +1,58 @@
+import { useMemo } from "react";
+import {
+  selectSheetTab,
+  useWorkspaceLayoutStore,
+  type SheetTab,
+} from "@/stores/workspace-layout-store";
+import type { WorkspaceTabTarget } from "@/workspace-tabs/model";
+import type { SubagentRow } from "./select";
+
+/** The workspace target a subagent row opens. */
+export function subagentRowTarget(row: SubagentRow): WorkspaceTabTarget {
+  return row.kind === "provider"
+    ? { kind: "provider_subagent", parentAgentId: row.parentAgentId, subagentId: row.id }
+    : { kind: "agent", agentId: row.id };
+}
+
+/**
+ * Answers, per subagent row, the sheet that shows it in place of the list, or null when choosing
+ * it reveals a tab instead. `parentTabId` is the tab of the pane the list belongs to.
+ */
+export function useSubagentSheetTab(
+  workspaceKey: string | null,
+  parentTabId: string,
+): (row: SubagentRow) => SheetTab | null {
+  // The rows render the answer, so this subscribes to everything the answer reads. A subagent
+  // already open as a tab reveals that tab instead, and a row rendered while that tab existed
+  // must re-render once it closes.
+  const layoutMode = useWorkspaceLayoutStore((state) => state.layoutMode);
+  const layout = useWorkspaceLayoutStore((state) =>
+    workspaceKey ? state.layoutByWorkspace[workspaceKey] : undefined,
+  );
+  const sheets = useWorkspaceLayoutStore((state) =>
+    workspaceKey ? state.sheetsByWorkspace[workspaceKey] : undefined,
+  );
+  return useMemo(() => {
+    // One answer per row until the state it reads changes, so a re-render of the list hands an
+    // open sheet the same tab rather than a fresh one.
+    const answers = new Map<string, SheetTab | null>();
+    return (row) => {
+      if (!workspaceKey) return null;
+      const state = {
+        layoutMode,
+        layoutByWorkspace: layout ? { [workspaceKey]: layout } : {},
+        sheetsByWorkspace: sheets ? { [workspaceKey]: sheets } : {},
+      };
+      const key = `${row.kind}:${row.id}`;
+      const known = answers.get(key);
+      if (known !== undefined) return known;
+      const sheet = selectSheetTab(state, {
+        workspaceKey,
+        target: subagentRowTarget(row),
+        parentTabId,
+      });
+      answers.set(key, sheet);
+      return sheet;
+    };
+  }, [layout, layoutMode, parentTabId, sheets, workspaceKey]);
+}
@@ -18,6 +18,8 @@ import {
 import type { Theme } from "@/styles/theme";
 import { useAgentFactsLine } from "@/panels/agent-facts-line";
 import { getPanelManifest } from "@/panels/panel-manifest";
+import { useSheetPanePage } from "@/screens/workspace/sheet-pane";
+import type { SheetTab } from "@/stores/workspace-layout-store";
 import type { SubagentRow } from "./select";
 import type { ArchiveFinishedStatus } from "./use-archive-finished";
 import {
@@ -40,10 +42,10 @@ export interface SubagentsTrackProps {
  onOpenSubagent: (address: AgentAddress) => void;
  onOpenProviderSubagent: (parentAgentId: string, subagentId: string) => void;
  /**
-   * Whether opening this row shows it in a sheet. A sheet stacks over the list and uncovers it on
-   * close, so the list stays open; a tab replaces the list's pane, so choosing it ends the list.
+   * The sheet a row opens, or null when it opens as a tab. A sheet replaces the list in place and
+   * Back returns to it; a tab replaces the list's pane, so choosing it ends the list.
   */
-  opensInSheet: (row: SubagentRow) => boolean;
+  sheetTabFor: (row: SubagentRow) => SheetTab | null;
  onArchiveSubagent: (address: AgentAddress) => void;
  onArchiveFinished?: () => void;
  archiveFinishedStatus?: ArchiveFinishedStatus;
@@ -71,13 +73,14 @@ export function SubagentsTrack({
  rows,
  onOpenSubagent,
  onOpenProviderSubagent,
-  opensInSheet,
+  sheetTabFor,
  onArchiveSubagent,
  onArchiveFinished,
  archiveFinishedStatus = IDLE_ARCHIVE_FINISHED_STATUS,
  onDetachSubagent,
 }: SubagentsTrackProps): ReactElement | null {
  const { t } = useTranslation();
+  const sheetPanePage = useSheetPanePage();

  const isArchivingFinished = archiveFinishedStatus.kind === "archiving";
  const isArchiveFinishedFailed = archiveFinishedStatus.kind === "failed";
@@ -88,9 +91,12 @@ export function SubagentsTrack({
  const pill = buildSubagentPillPresentation(t, rows);
  const finishedCount = countFinishedSubagents(rows);
  const showArchiveFinished = finishedCount > 0 || isArchivingFinished || isArchiveFinishedFailed;
+  const sheets = rows.map(sheetTabFor);
+  const pages = sheets.flatMap((sheet) => (sheet ? [sheetPanePage(sheet)] : []));

  return (
    <ComposerTrackPill
+      pages={pages}
      testID="subagents-track-header"
      segments={pill.segments}
      accessibilityLabel={pill.accessibilityLabel}
@@ -105,14 +111,14 @@ export function SubagentsTrack({
          />
        </ComposerTrackActions>
      ) : null}
-      {rows.map((row) => (
+      {rows.map((row, index) => (
        <SubagentsTrackRow
          key={row.kind === "paseo" ? `${row.address.serverId}:${row.id}` : row.id}
          row={row}
          serverId={serverId}
          onOpenSubagent={onOpenSubagent}
          onOpenProviderSubagent={onOpenProviderSubagent}
-          opensInSheet={opensInSheet(row)}
+          sheetTabId={sheets[index]?.tab.tabId ?? null}
          onArchiveSubagent={onArchiveSubagent}
          onDetachSubagent={onDetachSubagent}
        />
@@ -184,7 +190,8 @@ interface SubagentsTrackRowProps {
  row: SubagentRow;
  onOpenSubagent: (address: AgentAddress) => void;
  onOpenProviderSubagent: (parentAgentId: string, subagentId: string) => void;
-  opensInSheet: boolean;
+  /** The sheet page the row opens in place of the list, when it opens in a sheet. */
+  sheetTabId: string | null;
  onArchiveSubagent: (address: AgentAddress) => void;
  onDetachSubagent?: (address: AgentAddress) => void;
 }
@@ -194,7 +201,7 @@ function SubagentsTrackRow({
  row,
  onOpenSubagent,
  onOpenProviderSubagent,
-  opensInSheet,
+  sheetTabId,
  onArchiveSubagent,
  onDetachSubagent,
 }: SubagentsTrackRowProps): ReactElement {
@@ -269,7 +276,7 @@ function SubagentsTrackRow({
    <ComposerTrackRow
      accessibilityLabel={displayLabel}
      testID={`subagents-track-row-${row.id}`}
-      closeOnSelect={!opensInSheet}
+      opensPage={sheetTabId ?? undefined}
      onPress={handlePress}
    >
      {renderRow}
@@ -112,7 +112,7 @@ function appendRun<TGroup>(input: {
  const run = createRun(input.calls, input.isSealed);
  const host = createHost(run);
  input.output.push(host);
-  input.groups.set(host.id, input.buildGroup(run));
+  if (run.calls.length > 1) input.groups.set(host.id, input.buildGroup(run));
 }

 export function prepareGroupedHistory<TGroup>(input: {
@@ -180,7 +180,8 @@ export function groupLiveToolCalls<TGroup>(input: {
    if (hostPlacement === "head") {
      head.push(createHost(run));
    }
-    if (hostPlacement === "head" || pendingIncludesHead || !isSealed) {
+    const needsLiveGroup = hostPlacement === "head" || pendingIncludesHead || !isSealed;
+    if (run.calls.length > 1 && needsLiveGroup) {
      liveGroups.set(run.id, input.buildGroup(run));
    }
    pending = [];
@@ -217,19 +218,13 @@ export function groupLiveToolCalls<TGroup>(input: {
      historyGroupUpdatesByHostId: EMPTY_GROUPS,
    };
  }
-  if (input.history.groupsByHostId.size === 0) {
-    return {
-      tail: input.history.tail,
-      head,
-      groupsByHostId: liveGroups,
-      historyGroupUpdatesByHostId: EMPTY_GROUPS,
-    };
-  }
  const groupsByHostId = new Map(input.history.groupsByHostId);
  let historyGroupUpdatesByHostId: Map<string, TGroup> | null = null;
  for (const [id, group] of liveGroups) {
    groupsByHostId.set(id, group);
-    if (input.history.groupsByHostId.has(id)) {
+    const isHistoryHost =
+      input.history.groupsByHostId.has(id) || input.history.pendingCalls[0]?.id === id;
+    if (isHistoryHost) {
      historyGroupUpdatesByHostId ??= new Map();
      historyGroupUpdatesByHostId.set(id, group);
    }
@@ -4,8 +4,12 @@ import { BottomSheetScrollView, type BottomSheetScrollViewMethods } from "@gorho
 import { Wrench, X } from "lucide-react-native";
 import { StyleSheet, withUnistyles } from "react-native-unistyles";
 import { useTranslation } from "react-i18next";
-import { useIsolatedBottomSheetVisibility } from "@/components/ui/isolated-bottom-sheet-modal";
+import {
+  type ContextBridge,
+  useIsolatedBottomSheetVisibility,
+} from "@/components/ui/isolated-bottom-sheet-modal";
 import { ToolCallSheetModal, useToolCallSheetContextBridge } from "@/components/tool-call-sheet";
+import { useToolCallExpansionContextBridge } from "@/tool-calls/expansion-context";
 import type { Theme } from "@/styles/theme";

 interface OverviewToolCallGroupSheetProps {
@@ -29,7 +33,12 @@ export function OverviewToolCallGroupSheet({
 }: OverviewToolCallGroupSheetProps) {
  const { t } = useTranslation();
  const scrollRef = useRef<BottomSheetScrollViewMethods>(null);
-  const contextBridge = useToolCallSheetContextBridge();
+  const sheetContextBridge = useToolCallSheetContextBridge();
+  const expansionContextBridge = useToolCallExpansionContextBridge();
+  const contextBridge = useCallback<ContextBridge>(
+    (content) => sheetContextBridge(expansionContextBridge(content)),
+    [expansionContextBridge, sheetContextBridge],
+  );
  const { sheetRef, handleSheetChange, handleSheetDismiss } = useIsolatedBottomSheetVisibility({
    visible,
    onClose,
@@ -110,11 +110,7 @@ describe("tool call detail-level projection", () => {
      preparedHistory: prepared,
    });
    expect(single.head).toEqual([firstCall]);
-    expect(single.groupsByHostId.get(firstCall.id)?.run).toMatchObject({
-      calls: [firstCall],
-      latest: firstCall,
-      isSealed: false,
-    });
+    expect(single.groupsByHostId.size).toBe(0);

    const grouped = project({
      level: "overview",
@@ -142,18 +138,11 @@ describe("tool call detail-level projection", () => {
    expect(result.groupsByHostId.get("1")?.isLoading).toBe(true);
  });

-  it("builds a loading aggregate for a one-call run", () => {
+  it("leaves a running lone call visible without an aggregate", () => {
    const call = toolCall("1", { type: "shell", command: "one" }, { status: "running" });
    const result = project({ level: "overview", head: [call], isTurnActive: true });
-    const group = result.groupsByHostId.get(call.id);
-    if (!group) {
-      throw new Error("Expected an overview group");
-    }
-
-    expect(group).toMatchObject({
-      isLoading: true,
-      summary: { commandCount: 1 },
-    });
+    expect(result.head).toEqual([call]);
+    expect(result.groupsByHostId.size).toBe(0);
  });

  it("keeps an active overview group on its latest call until a visible boundary arrives", () => {
@@ -481,8 +470,7 @@ describe("tool call detail-level projection", () => {
    const result = project({ level: "overview", head: [singleCall, plan, speak] });

    expect(result.head).toEqual([singleCall, plan, speak]);
-    expect(result.groupsByHostId.get(singleCall.id)?.run.calls).toEqual([singleCall]);
-    expect(result.groupsByHostId.size).toBe(1);
+    expect(result.groupsByHostId.size).toBe(0);
  });
 });

@@ -529,12 +517,58 @@ it.each([false, true])(
    });
    expect(result.head).toEqual(autoExpandReasoning ? [thought] : []);
    expect(result.groupsByHostId.get(call.id)?.run.calls).toEqual(
-      autoExpandReasoning ? [call] : [call, thought],
+      autoExpandReasoning ? undefined : [call, thought],
+    );
+    expect(result.groupsByHostId.get(call.id)?.summary).toEqual(
+      autoExpandReasoning
+        ? undefined
+        : expect.objectContaining({
+            commandCount: 1,
+            otherToolCount: 0,
+            thoughtCount: 1,
+          }),
    );
-    expect(result.groupsByHostId.get(call.id)?.summary).toMatchObject({
-      commandCount: 1,
-      otherToolCount: 0,
-      thoughtCount: autoExpandReasoning ? 0 : 1,
-    });
  },
 );
+
+it("turns a retained lone call into a group without replacing its row key", () => {
+  const first = toolCall("1", { type: "shell", command: "one" });
+  const second = toolCall("2", { type: "shell", command: "two" });
+  const tail = [assistant("before"), first];
+  const preparedHistory = prepareToolCallHistory("overview", tail);
+  const single = project({ level: "overview", tail, preparedHistory, isTurnActive: true });
+  const grouped = project({
+    level: "overview",
+    tail,
+    head: [second],
+    preparedHistory,
+    isTurnActive: true,
+  });
+  expect(single.groupsByHostId.size).toBe(0);
+  expect(single.tail).toBe(tail);
+  expect(grouped.tail).toBe(single.tail);
+  expect(grouped.head).toEqual([]);
+  expect(grouped.groupsByHostId.get(first.id)?.run.calls).toEqual([first, second]);
+  expect(grouped.historyGroupUpdatesByHostId.get(first.id)).toBe(
+    grouped.groupsByHostId.get(first.id),
+  );
+});
+
+it("shows one thought as itself until another groupable item arrives", () => {
+  const thought: StreamItem = {
+    kind: "thought",
+    id: "thought",
+    text: "Checking",
+    status: "ready",
+    timestamp: new Date(0),
+  };
+  const single = project({ level: "overview", tail: [thought] });
+  expect(single.tail).toEqual([thought]);
+  expect(single.groupsByHostId.size).toBe(0);
+  const grouped = project({
+    level: "overview",
+    tail: [thought, toolCall("1", { type: "shell", command: "one" })],
+  });
+  expect(grouped.tail.map((item) => item.id)).toEqual([thought.id]);
+  expect(grouped.groupsByHostId.get(thought.id)?.run.calls).toHaveLength(2);
+});
@@ -0,0 +1,69 @@
+import { createContext, useCallback, useContext, useState, useSyncExternalStore } from "react";
+import type { ContextBridge } from "@/components/ui/isolated-bottom-sheet-modal";
+import {
+  createToolCallExpansion,
+  type ExpandedToolCallGroups,
+  type ToolCallExpansion,
+} from "./expansion";
+
+export const ToolCallExpansionContext = createContext<ToolCallExpansion | null>(null);
+
+/** One store per viewed agent; switching agents starts with every tool call closed. */
+export function useAgentToolCallExpansion(agentId: string): ToolCallExpansion {
+  const [owner, setOwner] = useState(() => ({ agentId, expansion: createToolCallExpansion() }));
+  if (owner.agentId === agentId) return owner.expansion;
+  const next = { agentId, expansion: createToolCallExpansion() };
+  setOwner(next);
+  return next.expansion;
+}
+
+/** Subscribes the timeline to group toggles only; call toggles never reach it. */
+export function useExpandedToolCallGroups(expansion: ToolCallExpansion): ExpandedToolCallGroups {
+  return useSyncExternalStore(
+    expansion.subscribeGroups,
+    expansion.getExpandedGroups,
+    expansion.getExpandedGroups,
+  );
+}
+
+function useToolCallExpansion(): ToolCallExpansion {
+  const expansion = useContext(ToolCallExpansionContext);
+  if (!expansion) throw new Error("ToolCall requires a ToolCallExpansionContext");
+  return expansion;
+}
+
+/** Carries tool call open state into sheets that render their content in a portal. */
+export function useToolCallExpansionContextBridge(): ContextBridge {
+  const expansion = useToolCallExpansion();
+  return useCallback(
+    (children) => (
+      <ToolCallExpansionContext.Provider value={expansion}>
+        {children}
+      </ToolCallExpansionContext.Provider>
+    ),
+    [expansion],
+  );
+}
+
+/** Subscribes one tool call to its own open state. */
+export function useToolCallExpanded(input: {
+  callId: string;
+  defaultExpanded: boolean;
+  standalone: boolean;
+}) {
+  const expansion = useToolCallExpansion();
+  const { callId, defaultExpanded, standalone } = input;
+  const subscribe = useCallback(
+    (listener: () => void) => expansion.subscribeCall(callId, listener),
+    [expansion, callId],
+  );
+  const getSnapshot = useCallback(
+    () => expansion.isCallExpanded(callId, defaultExpanded),
+    [expansion, callId, defaultExpanded],
+  );
+  const expanded = useSyncExternalStore(subscribe, getSnapshot, getSnapshot);
+  const toggle = useCallback(() => {
+    expansion.setCallExpanded({ callId, expanded: !expanded, standalone });
+  }, [expansion, callId, expanded, standalone]);
+  return { expanded, toggle };
+}
@@ -0,0 +1,79 @@
+import { describe, expect, it } from "vitest";
+import { createToolCallExpansion } from "./expansion";
+
+function observe(expansion: ReturnType<typeof createToolCallExpansion>) {
+  const notified: string[] = [];
+  expansion.subscribeCall("first", () => notified.push("first"));
+  expansion.subscribeCall("second", () => notified.push("second"));
+  expansion.subscribeGroups(() => notified.push("timeline"));
+  return notified;
+}
+
+describe("tool call expansion", () => {
+  it("opens a lone call and its future group without notifying the timeline", () => {
+    const expansion = createToolCallExpansion();
+    const notified = observe(expansion);
+    const groupsBefore = expansion.getExpandedGroups();
+
+    expansion.setCallExpanded({ callId: "first", expanded: true, standalone: true });
+
+    expect(notified).toEqual(["first"]);
+    expect(expansion.getExpandedGroups()).toBe(groupsBefore);
+    expect(expansion.isCallExpanded("first", false)).toBe(true);
+    expect(expansion.getExpandedGroups().has("first")).toBe(true);
+  });
+
+  it("closes the lone call and its future group together", () => {
+    const expansion = createToolCallExpansion();
+    const notified = observe(expansion);
+    const groupsBefore = expansion.getExpandedGroups();
+
+    expansion.setCallExpanded({ callId: "first", expanded: true, standalone: true });
+    expansion.setCallExpanded({ callId: "first", expanded: false, standalone: true });
+
+    expect(notified).toEqual(["first", "first"]);
+    expect(expansion.getExpandedGroups()).toBe(groupsBefore);
+    expect(expansion.isCallExpanded("first", false)).toBe(false);
+    expect(expansion.getExpandedGroups().has("first")).toBe(false);
+  });
+
+  it("keeps a call open when its group closes and reopens", () => {
+    const expansion = createToolCallExpansion();
+    const notified = observe(expansion);
+    expansion.setCallExpanded({ callId: "first", expanded: true, standalone: true });
+    const groupsWhenFormed = expansion.getExpandedGroups();
+
+    expansion.setGroupExpanded("first", false);
+    const closedGroups = expansion.getExpandedGroups();
+    expect(closedGroups).not.toBe(groupsWhenFormed);
+    expect(closedGroups.has("first")).toBe(false);
+    expect(expansion.isCallExpanded("first", false)).toBe(true);
+
+    expansion.setGroupExpanded("first", true);
+    expect(expansion.getExpandedGroups()).not.toBe(closedGroups);
+    expect(expansion.getExpandedGroups().has("first")).toBe(true);
+    expect(expansion.isCallExpanded("first", false)).toBe(true);
+    expect(notified).toEqual(["first", "timeline", "timeline"]);
+  });
+
+  it("toggles a call inside a group without touching the group", () => {
+    const expansion = createToolCallExpansion();
+    const notified = observe(expansion);
+    expansion.setGroupExpanded("first", true);
+    const groups = expansion.getExpandedGroups();
+
+    expansion.setCallExpanded({ callId: "first", expanded: true, standalone: false });
+    expansion.setCallExpanded({ callId: "first", expanded: false, standalone: false });
+
+    expect(notified).toEqual(["timeline", "first", "first"]);
+    expect(expansion.getExpandedGroups()).toBe(groups);
+    expect(groups.has("first")).toBe(true);
+  });
+
+  it("uses the call's default until the user toggles it", () => {
+    const expansion = createToolCallExpansion();
+    expect(expansion.isCallExpanded("first", true)).toBe(true);
+    expansion.setCallExpanded({ callId: "first", expanded: false, standalone: true });
+    expect(expansion.isCallExpanded("first", true)).toBe(false);
+  });
+});
@@ -0,0 +1,67 @@
+type Listener = () => void;
+
+/** Which tool call groups are open. A new value is published only when a group is toggled. */
+export interface ExpandedToolCallGroups {
+  has(groupId: string): boolean;
+}
+
+/**
+ * Open state of one agent's tool calls and tool call groups.
+ *
+ * A group takes its first call's id. Opening a lone call (`standalone`) also opens the group it
+ * will host once a second call arrives, without publishing a group change: the timeline renders
+ * that row again when the group forms and reads the open state then. A call toggle notifies only
+ * that call's subscribers.
+ */
+export function createToolCallExpansion() {
+  const calls = new Map<string, boolean>();
+  const callListeners = new Map<string, Set<Listener>>();
+  const groups = new Set<string>();
+  const groupListeners = new Set<Listener>();
+  let expandedGroups = createExpandedGroups();
+
+  function createExpandedGroups(): ExpandedToolCallGroups {
+    return { has: (groupId) => groups.has(groupId) };
+  }
+
+  function writeGroup(groupId: string, expanded: boolean) {
+    if (expanded) groups.add(groupId);
+    else groups.delete(groupId);
+  }
+
+  return {
+    isCallExpanded: (callId: string, defaultExpanded: boolean) =>
+      calls.get(callId) ?? defaultExpanded,
+    subscribeCall(callId: string, listener: Listener) {
+      let listeners = callListeners.get(callId);
+      if (!listeners) {
+        listeners = new Set();
+        callListeners.set(callId, listeners);
+      }
+      listeners.add(listener);
+      return () => {
+        listeners.delete(listener);
+        if (listeners.size === 0) callListeners.delete(callId);
+      };
+    },
+    setCallExpanded(input: { callId: string; expanded: boolean; standalone: boolean }) {
+      calls.set(input.callId, input.expanded);
+      if (input.standalone) writeGroup(input.callId, input.expanded);
+      for (const listener of callListeners.get(input.callId) ?? []) listener();
+    },
+    getExpandedGroups: () => expandedGroups,
+    subscribeGroups(listener: Listener) {
+      groupListeners.add(listener);
+      return () => {
+        groupListeners.delete(listener);
+      };
+    },
+    setGroupExpanded(groupId: string, expanded: boolean) {
+      writeGroup(groupId, expanded);
+      expandedGroups = createExpandedGroups();
+      for (const listener of groupListeners) listener();
+    },
+  };
+}
+
+export type ToolCallExpansion = ReturnType<typeof createToolCallExpansion>;
@@ -25,7 +25,6 @@ import {
  type PanelIconProps,
  type PanelPresentation,
 } from "@/panels/panel-registry";
-import { ensurePanelsRegistered } from "@/panels/register-panels";
 import {
  getTerminalProfileIcon,
  resolveTerminalProfiles,
@@ -109,7 +108,6 @@ export function useWorkspaceTabLaunchCatalog(input: {
  const { config } = useDaemonConfig(serverId);
  const plugins = useInstalledPlugins();
  const isCompact = useIsCompactFormFactor();
-  ensurePanelsRegistered();

  const launchSelection = useCallback(
    (selection: NewTabSelection) => (destination: WorkspaceTabLaunchDestination) => {
@@ -6,6 +6,7 @@ import {
  DEFAULT_PANE_ID,
  findPaneById,
  findPaneContainingTab,
+  selectSheetTab,
  useWorkspaceLayoutStore,
  type WorkspaceTabPlacement,
 } from "@/stores/workspace-layout-store";
@@ -144,7 +145,7 @@ export function openPreferredWorkspacePreview(
  // The sheet is already a single replaceable slot, so it needs no preview tab.
  if (
    existing ||
-    store.opensInSheet({ workspaceKey: input.workspaceKey, target: input.target, intent: "reveal" })
+    selectSheetTab(store, { workspaceKey: input.workspaceKey, target: input.target }) !== null
  ) {
    return openPreferredWorkspaceTarget(input);
  }
@@ -22,6 +22,10 @@ export function useBottomSheetModal(): never {
 export function useBottomSheet(): never {
  throw new Error("useBottomSheet is unavailable in tests");
 }
+// A drag area only hands its gesture to a sheet; with no sheet drawn there is nothing to drag.
+export function useBottomSheetGestureHandlers(): never {
+  throw new Error("useBottomSheetGestureHandlers is unavailable in tests");
+}
 export const BottomSheetModalInternalProvider = PassThrough;
 export const INITIAL_CONTAINER_LAYOUT = {
  height: 0,
@@ -1,8 +1,18 @@
-// The package ships untranspiled Flow, which the unit project cannot parse. Insets are a device
-// fact no test asserts on, so they are zero.
+import { createContext, useContext } from "react";
+
+// The package ships untranspiled Flow, which the unit project cannot parse. Like the real package,
+// the hook reads the insets context; outside a provider the insets are zero.
 const ZERO_INSETS = { top: 0, right: 0, bottom: 0, left: 0 } as const;

-export const useSafeAreaInsets = () => ZERO_INSETS;
+export interface EdgeInsets {
+  top: number;
+  right: number;
+  bottom: number;
+  left: number;
+}
+
+export const SafeAreaInsetsContext = createContext<EdgeInsets | null>(ZERO_INSETS);
+export const useSafeAreaInsets = () => useContext(SafeAreaInsetsContext) ?? ZERO_INSETS;
 export const useSafeAreaFrame = () => ({ x: 0, y: 0, width: 0, height: 0 });
 export const SafeAreaProvider = ({ children }: { children?: unknown }) => children;
 export const SafeAreaView = ({ children }: { children?: unknown }) => children;
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Mohamed Boudra	1a05491be5	chore(release): cut 0.14.0-beta.2	2026-10-28 18:16:49 +01:00
Mohamed Boudra	28bb7e29be	docs(changelog): fold 0.14.0-beta.2 UI fixes into the 0.14.0 entry	2026-10-28 17:46:16 +01:00
Mohamed Boudra	d6d04b0c56	Show a lone tool call as itself and group from the second call (#8109 ) * fix(app): show a lone tool call as itself and group from the second call A run of one tool call or thought renders as the call. When a second call arrives the row becomes a group that keeps the first call's id, so the row key stays put. Tool call and group open state move into a per-agent store: opening a lone call also opens its future group without notifying the timeline, so a click re-renders only that tool call. * test(app): cover lone tool calls turning into groups Desktop journeys check that an opened lone call keeps its details open inside the new group, that clicking it renders no timeline component, and that the group header lands where the call was. Compact covers the call sheet and a closed group. (cherry picked from commit `eee70e7fef`)	2026-10-28 17:42:03 +01:00
Mohamed Boudra	20b2dad610	Open a subagent in place of the subagents list on mobile (#8093 ) * fix(app): seat the subagent sheet's parent callout like the composer The sheet tab body padded the bottom safe-area inset, and the composer dock padded it again, so the parent callout in a subagent sheet floated a full navigation-bar height above where the composer sits in a tab. The sheet body (SheetBottomInset) now owns the inset: it pads it once and tells its content none is left, so the dock stays host-agnostic. Overlay sheets (adaptive modal sheet, menu sheet, combobox sheet) read the inset on the far side of their portal, so ones opened from sheet content still clear the screen edge. The callout takes the composer's rail and shows the parent's provider icon through StatusIcon: no icon box, with the running ring, attention dot or needs-input alert on the icon. * fix(app): give the attachment lightbox its own safe area An RN Modal passes its call site's context straight through, so a lightbox opened from a sheet tab read the bottom inset the sheet body had already spent (0) and drew over the navigation bar. The modal is its own window: it now gets its own SafeAreaProvider, which measures that window, and the image area reads its insets below it. floating-panels.md records the rule for overlays: read insets where the overlay draws. * feat(app): open a subagent in place of the subagents list on compact On phones, choosing a subagent from the subagents list now replaces the list inside the same sheet instead of stacking a second sheet over it. Back returns to the list, Close closes both, Android Back steps subagent -> list -> closed, and Open parent lands on the pane the list was opened from (for a nested subagent, its parent's sheet). - Menu engine: fill pages (`fill: true`) take the full sheet height, Back pops a page via `goBack`, and a page whose definition disappears falls back to the list. - One sheet pane (`screens/workspace/sheet-pane`) renders the header, body, bottom inset and focus for both containers: the workspace's detached sheet tabs and the in-list menu page. Only the container differs. - The header drags the sheet through `SheetDragArea`; compact menu sheets use the shared `SheetBackground`/`SheetHandle` chrome. - `selectSheetTab` describes the sheet a reveal would show without opening it. * fix(app): put the parent callout on one row The Open parent button already says what the callout is, so the Parent label goes. The parent's title shrinks to one line before the button does, so Open parent never wraps or leaves the row. * refactor(app): register panels once in the workspace screen Every reader of the panel registry called ensurePanelsRegistered, which imports every panel module. The panels render those readers (the agent panel's subagent track and parent callout, the new-tab panel's launcher, the diff panel's review surface), so each reader closed an import cycle through register-panels. The workspace screen, the only route that renders a registry reader, now registers the panels before anything under it renders, and the readers import only the leaf panel-registry. The pane content test registers a probe panel for real instead of mocking the registry. * test(app): transform the markdown WASM factory when Vite versions its URL Importing the sheet pane barrel in retained-chat-content.browser.test.tsx made Vite request md4c.js with a ?v= query, which the CommonJS-to-ESM transform did not match, so the test file failed to import. (cherry picked from commit `d6d5a266ad`)	2026-10-28 17:42:03 +01:00
Mohamed Boudra	58ca9a9b30	fix(app): remove blank space above Android turn footers (#8088 ) Android ships generated Markdown props without code.fontScale, so native measurement wraps inline code at a larger size than drawing. Regenerate both Android code structs and enforce generated-header parity for both platforms. (cherry picked from commit `7a0c6fbd82`)	2026-10-28 17:42:03 +01:00
Mohamed Boudra	dfa9977047	fix(app): truncate agent sender attribution to one line (#8092 ) Constrain the sender label to the message width so long agent names do not wrap above received messages. Keep the line limit opt-in on Button and cover compact chat widths with a real-browser regression. (cherry picked from commit `bede2b90ed`)	2026-10-28 17:42:03 +01:00
Mohamed Boudra	4f46e094a1	fix(app): restore expansion of long native user messages (#8089 ) Native hidden overflow capped the measured content at the preview height, so long messages never offered Show more. Use the native scroll layout mode on the existing View to measure full content while preserving clipping, and store only whether it overflows. (cherry picked from commit `befc3d5663`)	2026-10-28 17:42:03 +01:00
paseo-bot[bot]	dd914c1479	Keep docked navigation sizes consistent in narrow windows (#8052 ) * fix(app): unify layout and density breakpoints Align md styles with the existing 600pt compact/wide boundary so 600-719pt tablet windows no longer mix wide layout with compact metrics. Keep the 500pt composer threshold local to its measured content width. Let Settings navigation shrink before its detail pane falls below the existing 400pt target, while retaining the preferred 720pt split budget. Validated workspace typecheck, lint, formatting, real Chromium resize checks, Duo portrait and landscape, and existing sidebar geometry tests. * test(app): cover consistent docked navigation and readable Settings Compare narrow and wide navigation density and Settings detail space through the real browser journey, including compact Settings after resize. The regression fails with main's split layout and density boundaries. Co-authored-by: Elsa <zeyugao@outlook.com> --------- Co-authored-by: Elsa <zeyugao@outlook.com> Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com> (cherry picked from commit `ce412d04c3`)	2026-10-28 17:42:03 +01:00
paseo-bot[bot]	025e7ef1d8	Keep model-discovery errors away from picker edges (#8039 ) * fix(app): pad the model picker empty state on all sides The empty state carried vertical padding only, so the provider refresh error it renders wrapped from edge to edge and read as attached to the model picker's left border on web and mobile. One padding value keeps the message off the border on every platform. * test(app): keep model discovery errors inside picker edges Exercise a real catalog deadline through the existing Pi RPC fixture at desktop and compact browser widths. Both gutter assertions fail without the shared padding fix. Co-authored-by: Matteo Pietro Dazzi <matteopietro.dazzi@gmail.com> --------- Co-authored-by: Matteo Pietro Dazzi <matteopietro.dazzi@gmail.com> Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com> (cherry picked from commit `de50243885`)	2026-10-28 17:42:03 +01:00
Mohamed Boudra	b4e837a9fe	fix(app): keep grouped reasoning closed when Expand thinking is off (#8042 ) Thoughts are grouped with tool calls only while Expand thinking is off, yet opening a group rendered each thought with `defaultExpanded`, so the reasoning text popped open against the setting. Grouped thoughts now open like any other call: a closed Thinking row the reader clicks. The folded history also treated the latest retained turn as live whenever the agent was active without a known turn id, which unfolded the previous turn until the new turn's rows arrived. Without head rows, the latest turn stays live only while the active run is that turn. Co-authored-by: Claude <noreply@anthropic.com> (cherry picked from commit `25721c7847`)	2026-10-28 17:42:03 +01:00
Mohamed Boudra	f098f77f4a	chore(ci): remove Android module tests from ordinary CI (#8102 ) Native unit tests require an Android prebuild and Maven downloads that block otherwise completed app checks. Keep the explicit local test command while removing its CI invocation and dedicated Java setup. (cherry picked from commit `36fc4f0b43`)	2026-10-28 17:42:02 +01:00
Mohamed Boudra	f59ebd4fd5	fix(ci): pin Playwright jobs to supported Ubuntu image The ubuntu-latest rollout moved to Ubuntu 26.04, which the locked browser installer rejects. Keep browser-installing jobs on the same Ubuntu 24.04 image used by the last passing main run. (cherry picked from commit `1981d61aa2`)	2026-10-28 17:42:02 +01:00