feat(web): find messages and plans in the current thread

[Noojuno]

Long threads make earlier messages difficult to find, especially inside collapsed turns. Add find-in-thread to web and desktop with Mod+F, a command palette action, match navigation, and theme-aware highlights.

Search uses orchestration v2 contracts, services, and projected turn items. It scans the entire canonical conversation, including inherited fork history, and respects rollback visibility, cancelled queued messages, and answers folded into request cards. A bounded cache retains counts and item references for eight query snapshots. Thread revisions invalidate cached counts, including streamed updates and rollbacks. Cached navigation checks thread and fork-ancestor revisions without rebuilding the timeline index. The client reuses highlight ranges for unchanged rows and rebuilds them when text changes or a list row moves or is reused. Search responses contain counts and the selected match identity, without message bodies.

A new query starts at the first occurrence in or below the current viewport, including skipping occurrences above the viewport within a long message. If no later occurrence exists, it wraps to the first match. Next and previous navigate chronologically and wrap at both ends. Navigation is relative to the selected message and occurrence, so incoming matches before it do not shift the selection. Live thread updates refresh the count at most once per 300 ms, even during continuous streaming. Rapid clicks accumulate while the selected result is loading, and a live refresh preserves pending navigation.

Matches are revealed within the normal conversation. When the target is outside loaded history, the client fetches existing history pages until the message is available, then unfolds its turn and scrolls to the occurrence. There is no separate nearby-message search view. Visible occurrences retain their scroll position. Closing search keeps the reading position and opened turns. Pending navigation retains the selected result and counter; "Searching..." appears only while a new query has no result.

Switching environments discards the previous search, including when both environments contain the same thread ID. Search requires server support. On older servers, the palette action is hidden and the shortcut explains that the server needs updating. The renderer and search share Markdown transforms so matches follow displayed text. Search colours remain configurable in the theme editor and VS Code / Open VSX imports.

Rewritten around orchestration v2 and rebased onto the latest PR commits, preserving their folded-message, imported-conversation, and review fixes.

Validation

• Latest changes: 197 focused search, navigation, reading-position, and timeline tests passed. New coverage includes inserted matches before and after the selection, continuous updates, rapid clicks, pending navigation, empty fork sources gaining messages, streamed DOM text, and moved or reused rows. The preceding reading-position change passed 253 focused tests.
• Type checks passed for server, web, mobile, contracts, and client-runtime. Targeted lint passed with existing timeline warnings. Server, web, and desktop bundle builds and git diff --check passed.
• Browser verification against copied large threads: MW3 search began at 28/30 in the current viewport, advanced through 30/30, and wrapped to 1/30. The old match was loaded through history pages and visible in the normal timeline. Closing search left the target visible and the scroll offset unchanged. COD4 then began at 4/137 in the current view; next/previous revealed the matches at their actual conversation locations. Only one conversation timeline was mounted.
• Navigation benchmark against the copied COD4 thread with 137 matches: cached server requests took 0.09 to 0.49 ms, compared with 28 to 30 ms before this update. The first scan took 355 ms. This measures server work; unloaded matches still require history pages and client rendering.
• The latest Browser panel pass caught stale ranges after virtual rows moved. Focused DOM tests cover the fix, selective fold opening, and ignoring timer updates outside searchable text, but the final integrated pass could not finish because the preview automation host disconnected. The preceding completed Browser pass is described above.
• Native mobile does not expose find-in-thread; its shared contract imports pass type checking.

Earlier v2 checks included 355 focused search/projection/Markdown tests and 249 RPC/thread/theme/keybinding tests, plus type checks for shared code and the desktop build. Earlier browser assets below describe the archived v1 implementation.

Earlier v1 browser evidence, retained for reference

The recordings and screenshots below were captured before the v2 rewrite. They do not verify the current implementation. Commit references and verification claims in this section refer to that earlier version.

Updated default highlights — fb72d5007

Idle matches use rgba(253, 184, 51, 0.3) in OKLCH; the active match uses warm amber (#eea52b) with dark text. Theme overrides remain unchanged. Light and dark screenshots below were captured from the rebased app, with client A searching client B. Remote navigation and returning to the conversation also passed.

The earlier full verification set below was captured at fbe5cb8eb (before the default-colour update), using isolated Chromium and native 1920×1080 capture. Videos are H.264 MP4; setup/idle pauses are trimmed where noted, without speeding up interactions. Uploaded with gh-image.

Search and virtualization — default light/dark

A fixture with 1,000 turns / 3,000 messages contains four distant matches, including folded progress and code. All four highlights were visible after navigation; forward/reverse wraparound and closing/reopening find worked. The server-search pass mounted 20–22 timeline rows in total, including the retained conversation and search-result timelines.

default-search.mp4

Light	Dark

Before opening find → after finding an earlier message

Both captures use the latest commit; this compares UI states, not old/new source revisions.

Before opening find	Earlier match revealed

Remote environment — two running T3 instances

Ran two independent T3 instances with separate state directories. From instance A (localhost:8455), added instance B (localhost:8456) through Settings → Connections → Add environment → Remote link, using B's pairing code. The browser stayed on A throughout; search requests for B's thread went to B's WebSocket.

Verified all four distant matches in B's 1,000-turn / 3,000-message thread, forward/reverse wraparound, light/dark highlights, closing find, and searching again after reload. Search responses carried only 4–6 nearby messages during distant-match navigation.

The same thread ID exists in both environments, but only B contains formatneedle: B returned 2 matches; A returned 0; returning to B and reloading still returned 2. Captured WebSocket requests/responses confirm each query reached the selected instance. No browser page errors occurred.

Two-instance verification — 22 seconds, native 1080p

two-instance-search.mp4

Connected remote environment, light/dark search, and environment isolation

Remote search: light	Remote search: dark

Instance B: 2 matches	Instance A: 0 matches

Themes — VS Code JSON, Open VSX, and live editing

Imported explicit VS Code find-match colours in light/dark themes. In the theme editor, changing the current-match colour updates the highlight immediately; Cancel restores the imported colour. The recording shows both appearances.

theme-editing-complete.mp4

Light	Dark

Import and advanced search-colour controls

Light live preview	Dark live preview

Installed Nord from Open VSX and applied its imported search colours. Setup pauses are removed from this clip.

open-vsx-import.mp4

Open VSX installation and search result

Open VSX registry results	Search using imported Nord

Keybindings settings

Settings → Keybindings shows Chat: Find, bound to ⌘F on macOS, with !terminalFocus && !previewFocus.

keybindings.mp4

Light	Dark

Rendered-text regressions

Verified visible file-chip and inline-path labels, automatic disclosure opening, and horizontal code scrolling to reveal the active match. Source-only link text does not create an invisible result.

rendered-search-regressions.mp4

Verified a phrase spanning Markdown emphasis (2 matches, message and plan), a plan title (1 match), and a hidden link URL (0 matches).

plans-and-formatting.mp4

Rendered-text screenshots

Phrase across formatting	Plan title

Visible file-chip label	Revealed disclosure

Horizontal code reveal	Hidden URL: zero results

Older-server compatibility fallback

Capability simulation: intercepted the server configuration to advertise threadFind: false; this is not an old server binary. Search then loaded older history and navigated all four distant matches without server-search responses. Only 13–14 timeline rows were mounted at the measured navigation points. Forward and reverse wraparound worked in light/dark mode. Idle pauses are removed from the recording.

older-server-fallback.mp4

Fallback light/dark screenshots

Light	Dark

Model: gpt-6.1-sol. Harness: Codex.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR adds a substantial cross-layer find-in-thread capability with new server RPCs, projection searches, progressive history loading, virtualized navigation, Markdown indexing, and theme integration. It also changes the default mod+f product behavior, so the scope and customer policy require human review.

Not approved because:

• Per-PR cost limit exceeded (workspace setting). Approvability relies on correctness review in order to determine eligibility

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📒 Files selected for processing (7)

• apps/web/src/components/ChatView.tsx
• apps/web/src/components/chat/ChatHeader.tsx
• apps/web/src/components/chat/MessagesTimeline.tsx
• apps/web/src/components/chat/threadFind.ts
• apps/web/src/components/chat/threadFindHighlights.ts
• apps/web/src/components/chat/userMessageTerminalContexts.test.ts
• apps/web/src/components/chat/userMessageTerminalContexts.ts

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📝 Walkthrough

Walkthrough

The PR adds find-in-thread controls, shared case-insensitive search utilities, rendered-text matching, timeline highlighting, history loading, automatic expansion and scrolling, keybindings, Markdown pipeline reuse, and configurable search-match colors across web, mobile, and theme imports.

Changes

Shared search text and Markdown processing

Layer / File(s)	Summary
Shared search segmentation and rendered content packages/client-runtime/src/state/threadSearch.ts, apps/mobile/src/features/threads/thread-search-match.tsx, apps/web/src/components/CommandPaletteResults.tsx, apps/web/src/lib/visibleMessageText.ts, apps/web/src/components/chat/threadFindText.ts, apps/web/src/components/chat/userMessageTerminalContexts.ts	Shared helpers split highlighted text. Message and Markdown processing produce searchable rendered segments and preserve structured message contexts.
Shared chat Markdown pipeline apps/web/src/markdown-pipeline.ts, apps/web/src/components/ChatMarkdown.tsx, apps/web/package.json	Markdown plugins are centralized. The pipeline preserves rendering metadata and marks code headers and alert titles as excluded from thread search.

Find state and controls

Layer / File(s)	Summary
Find state, history, matching, and navigation apps/web/src/components/chat/threadFind.ts, apps/web/src/components/chat/threadFind.test.ts, apps/web/src/components/ChatView.tsx, apps/web/src/components/chat/useThreadFindHistory.ts, apps/web/src/components/chat/useThreadFindHistory.test.tsx	The active thread loads earlier pages, builds rendered-text matches, tracks the active index, supports wraparound navigation, and handles incomplete-history retry.
Find bar and entry points apps/web/src/components/chat/ThreadFindBar.tsx, apps/web/src/components/chat/ChatHeader.tsx, apps/web/src/components/CommandPalette.tsx, apps/web/src/components/chat/threadFindActionBus.ts, apps/web/src/components/ui/input-group.tsx	The header renders a controlled find bar. The command palette and shortcut open it through the action bus.
Keybinding and usage documentation packages/contracts/src/keybindings.ts, packages/shared/src/keybindings.ts, apps/web/src/keybindings.test.ts, docs/user/keybindings.md	chat.find is accepted and bound to mod+f outside terminal and preview focus. Documentation describes history loading and navigation controls.

Timeline matching and highlighting

Layer / File(s)	Summary
Timeline search integration apps/web/src/components/chat/MessagesTimeline.tsx, apps/web/src/components/chat/ProposedPlanCard.tsx	The timeline expands matching turns, marks searchable content, excludes terminal chips, scrolls to active matches, and keeps matching plans or messages expanded.
DOM highlight rendering apps/web/src/components/chat/threadFindHighlights.ts	The hook collects rendered text ranges, separates active and inactive matches, observes DOM changes, and cleans up CSS Custom Highlight registries.

Search-match theme support

Layer / File(s)	Summary
Theme roles and palettes packages/shared/src/themePalettes.ts, apps/web/src/themePalette.ts, apps/web/src/themePalette.test.ts, apps/web/src/components/settings/ThemeEditorPanel.tsx	Normal and active search-match roles are added to built-in palettes, vivid themes, editor groups, CSS variables, and palette update logic.
CSS and imported theme colors apps/web/src/index.css, apps/web/src/vscodeThemeImport.ts, apps/web/src/vscodeThemeImport.test.ts, apps/web/src/openVsxThemes.ts, apps/web/src/openVsxThemes.test.ts	CSS highlight rules use the new roles. VS Code and OpenVSX find-match colors are preserved, composited, mapped, and validated for readable contrast.

Estimated code review effort: 4 (Complex) | ~60 minutes

Sequence Diagram(s)

sequenceDiagram
  participant User
  participant ChatView
  participant HistoryLoader
  participant ThreadFindBar
  participant MessagesTimeline
  participant CSSHighlights
  User->>ChatView: Open find
  ChatView->>HistoryLoader: Load earlier thread pages
  HistoryLoader-->>ChatView: Return history status
  ChatView->>ThreadFindBar: Render query and match state
  User->>ThreadFindBar: Enter query or navigate
  ThreadFindBar->>ChatView: Update query or active index
  ChatView->>MessagesTimeline: Provide query and active match
  MessagesTimeline->>CSSHighlights: Register inactive and active ranges

Loading

Estimated code review effort: 4 (Complex) | ~60 minutes

Suggested reviewers: juliusmarminge, t3dotgg

Merge Risk: ⚪ Minimal · up to 46655

The find-in-thread changes are ready to merge with no identified material regressions.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 22.45% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 49 functions across 36 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Description check	⚠️ Warning	The description provides detailed problem context, implementation scope, and extensive validation results. However, it does not include the required Scope and approval information, and its current UI …	Add the triaged issue or explicit maintainer approval with scope justification. Add current-implementation screenshots and any required interaction recording, or explain why they are not needed. Organize the content under the template headi…

✅ Passed checks (3 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The description references issue #5562 as the related implementation.
Out of Scope Changes check	✅ Passed	The changes consistently support find-in-thread functionality, including search, rendering, navigation, history loading, theming, keybindings, and related tests. No clearly unrelated changes are ident…
Title check	✅ Passed	The title clearly summarizes the main change: adding find support for messages and plans in the current thread. It is concise and uses the repository's conventional format.

Full details: Description check

Explanation

The description provides detailed problem context, implementation scope, and extensive validation results. However, it does not include the required Scope and approval information, and its current UI evidence is described in prose while the included screenshots and recordings are explicitly from the earlier v1 implementation.

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Add the triaged issue or explicit maintainer approval with scope justification. Add current-implementation screenshots and any required interaction recording, or explain why they are not needed. Organize the content under the template headings: Problem, Change, Scope and approval, and Verification.

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Actionable comments posted: 1

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Inline comments:
In `@apps/web/src/components/chat/threadFind.ts`:
- Around line 21-35: Align searchableThreadEntryText with the text
representation used by ChatMarkdown so buildThreadFindMatches and
collectThreadFindRanges count the same visible content. Apply the shared
plain-text derivation to assistant messages as well as user messages, while
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• apps/mobile/src/features/threads/thread-search-match.tsx
• apps/web/src/components/ChatView.tsx
• apps/web/src/components/CommandPalette.tsx
• apps/web/src/components/CommandPaletteResults.tsx
• apps/web/src/components/chat/ChatHeader.tsx
• apps/web/src/components/chat/MessagesTimeline.tsx
• apps/web/src/components/chat/ProposedPlanCard.tsx
• apps/web/src/components/chat/ThreadFindBar.tsx
• apps/web/src/components/chat/threadFind.test.ts
• apps/web/src/components/chat/threadFind.ts
• apps/web/src/components/chat/threadFindActionBus.ts
• apps/web/src/components/chat/threadFindHighlights.ts
• apps/web/src/components/settings/ThemeEditorPanel.tsx
• apps/web/src/index.css
• apps/web/src/keybindings.test.ts
• apps/web/src/lib/visibleMessageText.test.ts
• apps/web/src/lib/visibleMessageText.ts
• apps/web/src/openVsxThemes.test.ts
• apps/web/src/openVsxThemes.ts
• apps/web/src/themePalette.test.ts
• apps/web/src/themePalette.ts
• apps/web/src/vscodeThemeImport.test.ts
• apps/web/src/vscodeThemeImport.ts
• docs/user/keybindings.md
• packages/client-runtime/src/state/threadSearch.test.ts
• packages/client-runtime/src/state/threadSearch.ts
• packages/contracts/src/keybindings.test.ts
• packages/contracts/src/keybindings.ts
• packages/shared/src/keybindings.ts
• packages/shared/src/themePalettes.ts

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Inline comments:
In `@apps/web/src/components/ChatView.tsx`:
- Line 5932: Update the query argument passed to buildThreadFindMatches in the
isThreadFindActive branch so it is suppressed only when threadFindHistoryState
is "loading", not for the "incomplete" state. Preserve findState.query for
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📒 Files selected for processing (6)

• apps/web/src/components/ChatView.tsx
• apps/web/src/components/chat/ChatHeader.tsx
• apps/web/src/components/chat/ThreadFindBar.tsx
• apps/web/src/components/chat/useThreadFindHistory.test.tsx
• apps/web/src/components/chat/useThreadFindHistory.ts
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[juliusmarminge]

Approved. Yash will fix some perf issues and then merge!

[AKolenda]

this is so needed