> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase24-session06-signal-workbench-local-triage/implementation_summary.md). # Implementation Summary **Session ID**: `phase24-session06-signal-workbench-local-triage` **Completed**: 2026-06-08 **Duration**: 1 hour *** ## Overview Implemented the Trend Finder Signal Workbench as a dense table-first review surface with browser-local triage. The Workbench projects generated `TrendFinderData` into immutable row models, supports search, filters, sorting, expanded evidence details, local triage states, bounded notes, and defensive localStorage persistence. *** ## Deliverables ### Files Created | File | Purpose | Lines | | --------------------------------------------------------------------------------- | ----------------------------------------------------------------------------- | ----- | | `src/extensions/trend-finder/signal-workbench-storage.ts` | Local triage storage contract, parser, serializer, and update helpers. | 315 | | `src/extensions/trend-finder/signal-workbench-model.ts` | Workbench row projection, search, filters, facets, and sorting helpers. | 812 | | `src/extensions/trend-finder/hooks/use-signal-workbench-triage.ts` | React hook for loading, persisting, resetting, and revalidating triage state. | 137 | | `src/extensions/trend-finder/components/signal-workbench-controls.tsx` | Search, filter, density, and result summary controls. | 256 | | `src/extensions/trend-finder/components/signal-workbench-table.tsx` | Dense sortable table with expandable evidence rows. | 382 | | `src/extensions/trend-finder/components/signal-triage-controls.tsx` | Triage state buttons, bounded notes, clear, and reset controls. | 191 | | `src/extensions/trend-finder/views/signal-workbench-view.tsx` | Workbench view wiring parsed data, model state, controls, and storage. | 268 | | `src/extensions/trend-finder/__tests__/signal-workbench-model.test.ts` | Model tests for projection, search, filters, sorting, and immutability. | 150 | | `src/extensions/trend-finder/__tests__/signal-workbench-storage.test.ts` | Storage tests for parsing, bounds, updates, dedupe, and serialization. | 140 | | `src/extensions/trend-finder/components/__tests__/signal-workbench-view.test.tsx` | Component tests for controls, expansion, triage, notes, and states. | 132 | ### Files Modified | File | Changes | | ----------------------------------------------------------------- | ------------------------------------------------------------------------------------- | | `src/extensions/trend-finder/client.tsx` | Registered the Workbench tab, icon, hero tagline, and localStorage capability text. | | `src/extensions/trend-finder/visibility-config.ts` | Added the Workbench view ID and visibility ID prefix. | | `src/extensions/trend-finder/components/trend-motion-presets.ts` | Added Workbench motion surface metadata. | | `src/extensions/trend-finder/fixtures.ts` | Added source-local actionability fixture coverage. | | `src/extensions/trend-finder/__tests__/visibility-views.test.tsx` | Stabilized related visibility tests for source setup and scheduler hooks. | | `docs/extensions/trend-finder-ui-surfaces.md` | Documented the Workbench, filters, sorting, local triage, and Watchlist boundary. | | `docs/extensions/trend-finder-runtime-and-provenance.md` | Documented that Workbench triage is browser-only and excluded from generated outputs. | *** ## Technical Decisions 1. **Keep triage browser-local**: Triage state is stored under `ai-os.trend-finder.signal-workbench.v1` and remains separate from generated topics, source summaries, score fields, Watchlist rows, and exports. 2. **Project rows before rendering**: The Workbench derives row, evidence, filter, facet, and sort models through pure helpers so behavior can be tested without mutating `TrendFinderData`. 3. **Use deterministic ordering**: Sort comparators include stable tie-breakers by rank, score, topic name, and topic ID to avoid row churn during review. *** ## Test Results | Metric | Value | | --------------------------------------- | --------- | | Focused Workbench tests | 16 passed | | Focused Workbench plus visibility tests | 26 passed | | Typecheck | Passed | | Targeted lint | Passed | | Diff validation | Passed | | Coverage | Not run | The full repository test suite still times out, but that timeout is documented as a pre-existing, unrelated blocker and was accepted for this closeout. *** ## Lessons Learned 1. Dense triage needs an explicit local state boundary so generated Watchlist semantics stay stable. 2. Visibility and scheduler hooks need stable test harness defaults when a new tab shares the Trend Finder registry. *** ## Future Considerations Items for future sessions: 1. Add the optional static Brief export without including browser-local triage. 2. Keep documentation and Reference mode aligned as more Phase 24 surfaces ship. 3. Track the unrelated full-repo test timeout outside this session. *** ## Session Statistics * **Tasks**: 25 completed * **Files Created**: 10 * **Files Modified**: 7 * **Tests Added**: 3 files * **Blockers**: 0 session blockers; 1 unrelated full-repo timeout documented --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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