> 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/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md). # Implementation Notes **Session ID**: `phase27-session02-deterministic-derived-signals-and-risk-flags` **Started**: 2026-06-12 20:44 **Last Updated**: 2026-06-12 21:16 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 20 / 20 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ### Task T001 - Verify analyzer state, Session 01 completion, and Session 02 source stub **Started**: 2026-06-12 20:43 **Completed**: 2026-06-12 20:44 **Duration**: 1 minutes **Notes**: * Analyzer resolved `phase27-session02-deterministic-derived-signals-and-risk-flags` as the current session. * `.spec_system/state.json` lists `phase27-session01-brief-movement-groups-and-calibration-metrics` in completed sessions. * Session 02 PRD stub is present under `.spec_system/PRD/phase_27/` and matches the active session objective. * Existing working tree had pre-session spec/state changes; they were preserved. **Files Changed**: * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked setup verification complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged setup verification. *** ### Task T002 - Inspect scoring, source-breakdown, schema, card, Hidden Gems, and Workbench baselines **Started**: 2026-06-12 20:44 **Completed**: 2026-06-12 20:46 **Duration**: 2 minutes **Notes**: * Scoring currently computes the weighted six-factor score in `calculateOpportunityScore`; this path must remain unchanged. * Topic source breakdown derivation already spreads topic objects, so additive fields can survive breakdown attachment. * Collector source breakdown failures already produce warnings; scoring-derived fields need the same visible failure boundary. * UI projection is centralized through `view-model.ts` and `signal-workbench-model.ts`; cards, Hidden Gems, and tables should consume view models instead of duplicating raw enum formatting. * Workbench table uses fixed columns and `colSpan`; new compact fields require explicit column sizing. **Files Changed**: * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked baseline inspection complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged baseline findings. *** ### Task T003 - Extend Trend Finder topic schema with additive derived signal defaults **Started**: 2026-06-12 20:46 **Completed**: 2026-06-12 20:48 **Duration**: 2 minutes **Notes**: * Added closed `TREND_TOPIC_RISK_FLAGS` enum values for the four scoped deterministic risk flags. * Added additive topic fields for saturation, continuous hidden-gem score, consensus ratio, role shares, builder signal share, and risk flags. * Chose `null` defaults for unavailable ratios/scores that must not render as fake zero signals. * Kept role shares bounded to the existing source-role enum count and risk flags bounded to the enum count. **Files Changed**: * `src/extensions/trend-finder/schema.ts` - added derived-signal schema fields, defaults, role-share schema, and risk flag type exports. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked schema extension complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged schema extension. **BQC Fixes**: * Contract alignment: nullable defaults distinguish unavailable derived ratios from valid zero values (`src/extensions/trend-finder/schema.ts`). *** ### Task T004 - Add deterministic risk flag helper **Started**: 2026-06-12 20:48 **Completed**: 2026-06-12 20:50 **Duration**: 2 minutes **Notes**: * Added `deriveTopicRiskFlags` with schema validation and explicit issue mapping. * Implemented the four scoped flags: `single-source-signal`, `low-quality-source-dominated`, `stale-evidence`, and `placement-adjacent`. * Kept flag output stable by filtering through the schema enum order. * Used only evidence/source metadata and source-local placement state; no raw source payloads are inspected. **Files Changed**: * `scripts/lib/ai-runtime/risk-flags.ts` - added pure deterministic risk flag helper and validation result type. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked risk flag helper complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged risk flag helper work. **BQC Fixes**: * Failure path completeness: malformed risk inputs return structured issues instead of throwing from the helper (`scripts/lib/ai-runtime/risk-flags.ts`). * Trust boundary enforcement: helper input is validated through a local Zod schema before flags are derived (`scripts/lib/ai-runtime/risk-flags.ts`). *** ### Task T005 - Add saturation and continuous hidden-gem score derivation **Started**: 2026-06-12 20:50 **Completed**: 2026-06-12 20:51 **Duration**: 1 minutes **Notes**: * Added `calculateSaturation` as a display estimate using source pressure, current/historical evidence pressure, and recurrence pressure. * Added `calculateHiddenGemScore` as a continuous score that combines novelty margin, evidence-strength margin, inverse saturation, low-volume fit, and existing hidden-gem criteria. * Populated `saturation` and `hiddenGemScore` on scored topics without changing `OPPORTUNITY_SCORE_WEIGHTS` or `calculateOpportunityScore`. * Saturation returns `null` when evidence is absent or there is no active/degraded source denominator. **Files Changed**: * `scripts/lib/ai-runtime/scoring.ts` - added derived saturation and hidden-gem score helpers and populated topic fields. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked scoring derived signals complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged scoring derived signals. **BQC Fixes**: * Contract alignment: weighted opportunity score dimensions and weights remain unchanged while derived display fields are additive (`scripts/lib/ai-runtime/scoring.ts`). * Failure path completeness: unavailable saturation is represented as `null`, not a misleading zero (`scripts/lib/ai-runtime/scoring.ts`). *** ### Task T006 - Extend topic source breakdown derivation with consensus and role shares **Started**: 2026-06-12 20:51 **Completed**: 2026-06-12 20:52 **Duration**: 1 minutes **Notes**: * Added consensus ratio derivation using active/degraded current-run sources as the denominator. * Added deterministic role-share rows from topic evidence and source roles, with missing sources mapped to `unknown`. * Added builder signal share from developer and research role shares. * Kept existing source breakdown row ordering and row cap behavior intact. **Files Changed**: * `scripts/lib/ai-runtime/source-breakdown.ts` - added consensus, role-share, and builder-share derivation. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked source breakdown derived signals complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged source breakdown work. **BQC Fixes**: * Contract alignment: consensus uses only active/degraded current-run sources and returns `null` when the denominator is absent (`scripts/lib/ai-runtime/source-breakdown.ts`). *** ### Task T007 - Add derived-signal view-model helpers **Started**: 2026-06-12 20:52 **Completed**: 2026-06-12 20:54 **Duration**: 2 minutes **Notes**: * Added saturation band labels, unavailable copy, risk flag chip labels, role share labels, consensus labels, builder labels, and derived signal projection helpers. * Added `derivedSignals` to `TopicCardViewModel` so UI surfaces can reuse one browser-safe projection. * Updated Hidden Gems comparison to use `hiddenGemScore` first, then deterministic score/momentum/novelty/name/id tie-breakers. * Used exhaustive switches for saturation bands and risk flag enum handling. **Files Changed**: * `src/extensions/trend-finder/view-model.ts` - added derived signal projection helpers and Hidden Gems ordering. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked view-model helper task complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged view-model helper work. **BQC Fixes**: * Contract alignment: UI-facing labels come from exhaustive enum and band helpers rather than repeated raw-field formatting (`src/extensions/trend-finder/view-model.ts`). * Failure path completeness: unavailable derived signals have explicit labels and descriptions (`src/extensions/trend-finder/view-model.ts`). *** ### Task T008 - Wire risk flag derivation into scored topics **Started**: 2026-06-12 20:54 **Completed**: 2026-06-12 20:55 **Duration**: 1 minutes **Notes**: * Scoring now calls `deriveTopicRiskFlags` after saturation and hidden-gem score derivation. * Inputs come from existing scoring evidence, source quality maps, generated time, and source-local placement metadata. * No source adapters, AI calls, or third-party transfers were added. * Non-throwing risk helper results keep the scoring path resilient if validation ever rejects malformed internal inputs. **Files Changed**: * `scripts/lib/ai-runtime/scoring.ts` - wired deterministic risk flags into scored topic output. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked risk wiring complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged risk wiring. **BQC Fixes**: * External dependency resilience: no new external calls are introduced; risk flags derive from already-collected local runtime data (`scripts/lib/ai-runtime/scoring.ts`). * Failure path completeness: helper validation failure degrades to an empty bounded flag array instead of throwing from scoring (`scripts/lib/ai-runtime/scoring.ts`). *** ### Task T009 - Preserve derived fields through collector attachment steps **Started**: 2026-06-12 20:55 **Completed**: 2026-06-12 20:57 **Duration**: 2 minutes **Notes**: * Added explicit scoring defaults for source-breakdown-derived fields before the breakdown step fills them. * Verified source breakdown, historical summary attachment, and source-local topic attachment preserve additive topic fields by spreading topic objects. * Added a warning and trace failure path around source-local topic signal attachment so a derivation failure does not drop already-scored topics. * Extended scoring trace rows with saturation, hidden-gem score, consensus, builder share, and risk flags for deterministic inspection. **Files Changed**: * `scripts/lib/ai-runtime/scoring.ts` - added default consensus, role-share, and builder fields to scored topic output. * `scripts/extensions/trend-finder/collector.ts` - added source-local topic derivation failure handling and derived-field trace output. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked collector preservation complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged collector preservation work. **BQC Fixes**: * Failure path completeness: source-local topic derivation failures now produce a collector warning while preserving scored topics (`scripts/extensions/trend-finder/collector.ts`). * Contract alignment: scored topics include additive defaults before later collector stages fill source-derived fields (`scripts/lib/ai-runtime/scoring.ts`). *** ### Task T010 - Render derived signals on trend cards **Started**: 2026-06-12 20:57 **Completed**: 2026-06-12 20:58 **Duration**: 1 minutes **Notes**: * Trend cards now render saturation, hidden-gem score, consensus, builder signal share, and deterministic risk chips from `derivedSignals`. * Unavailable derived values show explicit unavailable labels instead of numeric zeroes. * Risk chips are bounded to enum-derived labels and expose descriptions through `aria-label` and `title`. **Files Changed**: * `src/extensions/trend-finder/components/trend-card.tsx` - added derived signal metric rendering and risk chips. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked trend card rendering complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged trend card rendering. **BQC Fixes**: * Accessibility and platform compliance: derived metrics and risk chips include explicit accessible labels (`src/extensions/trend-finder/components/trend-card.tsx`). * Failure path completeness: unavailable derived values are visible through view-model labels (`src/extensions/trend-finder/components/trend-card.tsx`). *** ### Task T011 - Render consensus and role-share summaries in source breakdown **Started**: 2026-06-12 20:58 **Completed**: 2026-06-12 20:59 **Duration**: 1 minutes **Notes**: * Source breakdown now accepts the derived signal projection for consensus, builder signal, and role summary. * Trend cards pass `derivedSignals` into source breakdown so the same component can show source consensus and role-share context above rows. * Empty source context still shows explicit fallback copy while retaining any available derived summary. **Files Changed**: * `src/extensions/trend-finder/components/source-breakdown.tsx` - added source derived summary rendering with accessible labels. * `src/extensions/trend-finder/components/trend-card.tsx` - passed derived signals into source breakdown. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked source breakdown rendering complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged source breakdown rendering. **BQC Fixes**: * Accessibility and platform compliance: source derived summaries include `aria-label` text for consensus, builder, and role shares (`src/extensions/trend-finder/components/source-breakdown.tsx`). * Failure path completeness: empty source rows still render explicit fallback copy instead of a blank block (`src/extensions/trend-finder/components/source-breakdown.tsx`). *** ### Task T012 - Sort Hidden Gems by continuous hidden-gem score and update copy **Started**: 2026-06-12 20:59 **Completed**: 2026-06-12 21:00 **Duration**: 1 minutes **Notes**: * Hidden Gems ordering now uses `hiddenGemScore` first via the shared comparator, followed by deterministic score/momentum/novelty/name/id tie-breakers. * Hidden Gems list and inspector display gem score and saturation instead of implying velocity is the primary rank signal. * Toolbar copy now describes continuous gem score ordering. * Inspector source breakdown receives derived signals for consensus and role-share context. **Files Changed**: * `src/extensions/trend-finder/view-model.ts` - Hidden Gems comparator uses continuous hidden-gem score. * `src/extensions/trend-finder/views/hidden-gems-view.tsx` - updated visible copy and metrics for gem score/saturation. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked Hidden Gems ordering complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged Hidden Gems ordering. **BQC Fixes**: * Contract alignment: visible Hidden Gems copy now matches the actual sort priority (`src/extensions/trend-finder/views/hidden-gems-view.tsx`). *** ### Task T013 - Project saturation, risk, and builder fields into Signal Workbench model **Started**: 2026-06-12 21:00 **Completed**: 2026-06-12 21:01 **Duration**: 1 minutes **Notes**: * Added Workbench row fields for hidden-gem score, saturation, builder share, and risk flag labels. * Added saturation and risk filters, facets, and search text indexing. * Added sort values for hidden-gem score, saturation, builder signal, and risk flag count. * Added a run re-entry reset in the Workbench view so stale filters and sort state do not carry into a new run while expanded rows are revalidated by row ID. **Files Changed**: * `src/extensions/trend-finder/signal-workbench-model.ts` - added derived field projection, filters, facets, search, and sort values. * `src/extensions/trend-finder/views/signal-workbench-view.tsx` - reset Workbench state on run re-entry. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked Workbench model projection complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged Workbench model projection. **BQC Fixes**: * State freshness on re-entry: filters and sort state reset when the parsed run identity changes, while expanded rows are revalidated against current row IDs (`src/extensions/trend-finder/views/signal-workbench-view.tsx`). * Contract alignment: Workbench search/filter/sort values use schema-backed risk flags and view-model saturation bands (`src/extensions/trend-finder/signal-workbench-model.ts`). *** ### Task T014 - Add Signal Workbench saturation and risk filter controls **Started**: 2026-06-12 21:01 **Completed**: 2026-06-12 21:02 **Duration**: 1 minutes **Notes**: * Added compact labeled selects for saturation band and risk flag filters. * Existing reset detection and reset button now include the new filters because they are part of `SignalWorkbenchFilters`. * Reused the existing select pattern to avoid layout drift and preserve keyboard behavior. **Files Changed**: * `src/extensions/trend-finder/components/signal-workbench-controls.tsx` - added saturation and risk filter selects. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked Workbench controls complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged Workbench controls. **BQC Fixes**: * Accessibility and platform compliance: new filters reuse labeled native select controls with keyboard support (`src/extensions/trend-finder/components/signal-workbench-controls.tsx`). *** ### Task T015 - Surface derived values in the Workbench table **Started**: 2026-06-12 21:02 **Completed**: 2026-06-12 21:04 **Duration**: 2 minutes **Notes**: * Added fixed Workbench table columns for hidden-gem score, saturation, builder signal, and risk flag count. * Updated the table colgroup and expanded-row colspan to match the new column count. * Added derived signal chips to topic cells and expanded detail rows. * Tightened metric pills to truncate long values instead of widening fixed cells. **Files Changed**: * `src/extensions/trend-finder/components/signal-workbench-table.tsx` - added derived columns, fixed widths, accessible labels, and truncation. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked Workbench table complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged Workbench table work. **BQC Fixes**: * Accessibility and platform compliance: derived table chips expose accessible labels (`src/extensions/trend-finder/components/signal-workbench-table.tsx`). * Layout stability: fixed column widths and truncated metric-pill values prevent risk labels from resizing the table (`src/extensions/trend-finder/components/signal-workbench-table.tsx`). *** ### Task T016 - Add scoring and risk-flag tests **Started**: 2026-06-12 21:04 **Completed**: 2026-06-12 21:06 **Duration**: 2 minutes **Notes**: * Added risk flag unit tests covering all four scoped flags, empty evidence, missing-date stale behavior, and invalid input issue mapping. * Added scoring coverage for saturation, continuous hidden-gem score, no-evidence unavailable defaults, and unchanged weighted score calculation. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/risk-flags.test.ts` - added deterministic risk flag unit tests. * `scripts/lib/ai-runtime/__tests__/scoring.test.ts` - added saturation, hidden-gem score, and no-evidence assertions. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked scoring/risk tests complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged scoring/risk tests. **BQC Fixes**: * Contract alignment: tests assert derived fields do not change the weighted score calculation (`scripts/lib/ai-runtime/__tests__/scoring.test.ts`). *** ### Task T017 - Add source-breakdown tests **Started**: 2026-06-12 21:06 **Completed**: 2026-06-12 21:07 **Duration**: 1 minutes **Notes**: * Added source-breakdown coverage for active/degraded consensus denominator behavior. * Added role share and builder signal assertions. * Added unavailable consensus/builder cases for no evidence and offline-only denominator. * Asserted offline low-quality source metadata remains projected in source rows. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts` - added derived consensus, role-share, builder, and unavailable-state tests. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked source-breakdown tests complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged source-breakdown tests. **BQC Fixes**: * Contract alignment: tests assert offline sources are excluded from consensus denominator but remain visible in source rows (`scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts`). *** ### Task T018 - Add schema and fixture regression tests **Started**: 2026-06-12 21:07 **Completed**: 2026-06-12 21:09 **Duration**: 2 minutes **Notes**: * Added schema assertions for derived-signal defaults on minimal topics. * Added bounded derived field parsing and invalid risk-flag rejection coverage. * Extended the fixture data with filled, unavailable, and risk-flagged derived signal examples. * Extended fixture parsing tests to assert the new fields survive schema parsing. **Files Changed**: * `src/extensions/trend-finder/fixtures.ts` - added derived signal fixture coverage and helper defaults. * `src/lib/__tests__/trend-finder-schema.test.ts` - added schema default, parsing, invalid risk, and fixture regression assertions. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked schema/fixture tests complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged schema/fixture tests. **BQC Fixes**: * Contract alignment: legacy payloads that omit derived fields still parse with explicit safe defaults (`src/lib/__tests__/trend-finder-schema.test.ts`). *** ### Task T019 - Add view-model and Signal Workbench model tests **Started**: 2026-06-12 21:09 **Completed**: 2026-06-12 21:10 **Duration**: 1 minutes **Notes**: * Added view-model tests for saturation unavailable/available states and risk chip ordering/labels. * Added Hidden Gems ordering test proving continuous hidden-gem score ranks before score. * Added Workbench model tests for saturation/risk projection, filters, facets, search, and hidden-gem score sorting. * Existing non-mutation Workbench test remains in place to guard generated data immutability. **Files Changed**: * `src/extensions/trend-finder/__tests__/view-model.test.ts` - added derived signal labels and Hidden Gems ordering tests. * `src/extensions/trend-finder/__tests__/signal-workbench-model.test.ts` - added derived Workbench projection/filter/facet/search/sort assertions. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked view-model/Workbench tests complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged view-model/Workbench tests. **BQC Fixes**: * Contract alignment: tests assert UI ordering and Workbench filters match the derived signal contracts (`src/extensions/trend-finder/__tests__/view-model.test.ts`, `src/extensions/trend-finder/__tests__/signal-workbench-model.test.ts`). *** ### Task T020 - Run focused tests, typechecks, full test command, and encoding validation **Started**: 2026-06-12 21:10 **Completed**: 2026-06-12 21:16 **Duration**: 6 minutes **Notes**: * Ran Prettier across touched TypeScript and TSX files. * Ran focused Trend Finder and runtime coverage, including scoring, risk flags, source breakdown, schema, view model, Workbench model, and dashboard tests. * Ran the full test suite after fixing Workbench re-entry behavior to preserve valid expanded rows. * Ran both application and script typechecks successfully. * Ran ASCII and CRLF validation across changed and untracked files. **Validation**: * `bun run test -- scripts/lib/ai-runtime/__tests__/scoring.test.ts scripts/lib/ai-runtime/__tests__/risk-flags.test.ts scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts src/lib/__tests__/trend-finder-schema.test.ts src/extensions/trend-finder/__tests__/view-model.test.ts src/extensions/trend-finder/__tests__/signal-workbench-model.test.ts src/lib/__tests__/trend-finder-dashboard.test.tsx` - passed, 7 files / 164 tests. * `bun run test -- src/extensions/trend-finder/components/__tests__/signal-workbench-view.test.tsx` - passed, 1 file / 6 tests. * `bun run test` - passed, 268 files / 3334 tests. * `bun run typecheck` - passed. * `bun run typecheck:scripts` - passed. * ASCII scan - passed. * CRLF scan - passed. **Files Changed**: * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/tasks.md` - marked final validation task and completion checklist complete. * `.spec_system/specs/phase27-session02-deterministic-derived-signals-and-risk-flags/implementation-notes.md` - logged final validation results. **BQC Fixes**: * Regression fix: Workbench run re-entry now resets stale filters and sort state without collapsing valid expanded rows, preserving existing component behavior while still revalidating stale row IDs (`src/extensions/trend-finder/views/signal-workbench-view.tsx`). * Validation completeness: full tests, focused tests, app typecheck, script typecheck, ASCII, and CRLF checks all passed before session close. *** ## Task Log ### 2026-06-12 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** --- # Agent Instructions This documentation is published with GitBook. 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