> 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-session07-convergence-detection-and-trajectory-visuals/implementation-notes.md). # Implementation Notes **Session ID**: `phase27-session07-convergence-detection-and-trajectory-visuals` **Started**: 2026-06-13 01:36 **Last Updated**: 2026-06-13 02:08 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 21 / 21 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ## Task Log ### 2026-06-13 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** ### Task T001 - Verify analyzer state, prerequisite sessions, and scope **Started**: 2026-06-13 01:36 **Completed**: 2026-06-13 01:36 **Duration**: 1 minute **Notes**: * Analyzer reported current session `phase27-session07-convergence-detection-and-trajectory-visuals`. * Phase 27 Session 04 and Session 06 are listed in completed sessions. * Convergence scope is bounded to existing linked evidence timestamps, source metadata, and selected-topic browser visuals. * Tool prerequisites passed with Bun 1.3.14. **Files Changed**: * `.spec_system/specs/phase27-session07-convergence-detection-and-trajectory-visuals/implementation-notes.md` - Created implementation log with verified session state. **BQC Fixes**: * N/A - session bookkeeping only. *** ### Task T002 - Inspect Trend Finder runtime, schema, UI, evidence, and fixtures **Started**: 2026-06-13 01:36 **Completed**: 2026-06-13 01:38 **Duration**: 2 minutes **Notes**: * Reviewed collector finalization around scoring, source breakdowns, historical summaries, sparklines, Engine Replay trace context, and validated payload assembly. * Reviewed scoring inputs for `HistoricalTopicContext.scoreHistory` and current score emission. * Reviewed schema default patterns, bounded arrays, view-model sanitization helpers, Signal Radar selected-topic layout, fixtures, and local component/test conventions. * Confirmed ADR 0001 keeps Trend Finder static and browser payloads isolated under `LiveData.extensions`. **Files Changed**: * `.spec_system/specs/phase27-session07-convergence-detection-and-trajectory-visuals/implementation-notes.md` - Logged baseline orientation. **BQC Fixes**: * N/A - source orientation only. *** ### Task T003 - Create pure convergence helper **Started**: 2026-06-13 01:38 **Completed**: 2026-06-13 01:40 **Duration**: 2 minutes **Notes**: * Added deterministic linked-evidence convergence derivation with duplicate evidence ID suppression. * Normalizes valid evidence timestamps, rejects invalid timestamps, and rejects future timestamps when `generatedAt` is provided. * Returns explicit `detected`, `not-detected`, `single-source`, and `unavailable` states with capped source rows and lead/follower lag hours. * Added aggregate convergence summary counters for collector trace use. **Files Changed**: * `scripts/lib/ai-runtime/convergence.ts` - Created pure helper, source ordering, lag calculation, state handling, and sanitized counters. **BQC Fixes**: * Trust boundary enforcement: invalid, blank, and future evidence timestamps are excluded rather than coerced. * Contract alignment: helper output is bounded and state-enumerated for later schema/UI projection. *** ### Task T004 - Add convergence helper unit tests **Started**: 2026-06-13 01:40 **Completed**: 2026-06-13 01:41 **Duration**: 1 minute **Notes**: * Added tests for detected convergence, exact 48-hour equality, outside-window not-detected state, invalid/future timestamps, single-source topics, duplicate evidence IDs, and stable tie ordering. * Added aggregate counter coverage for sanitized trace summaries. * Focused command passed: `bunx vitest run scripts/lib/ai-runtime/__tests__/convergence.test.ts`. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/convergence.test.ts` - Created helper test coverage for session edge cases. **BQC Fixes**: * Contract alignment: tests lock helper states and bounded aggregate counters. * Trust boundary enforcement: tests confirm invalid and future timestamps do not produce guessed ordering. *** ### Task T005 - Extend scoring output with score trajectory **Started**: 2026-06-13 01:41 **Completed**: 2026-06-13 01:43 **Duration**: 2 minutes **Notes**: * Added bounded score trajectory construction from `HistoricalTopicContext.scoreHistory` plus the current run score. * Missing historical score history emits a `missing-history` state with the current score recorded separately and no flat fake series. * Historical points are sorted, deduplicated by timestamp, capped, and normalized to scores from 0 to 100. * No forecast point, `tbts`, peak-day, or time-to-breakout estimate is published. * Focused command passed: `bunx vitest run scripts/lib/ai-runtime/__tests__/scoring.test.ts`. **Files Changed**: * `scripts/lib/ai-runtime/scoring.ts` - Added `buildScoreTrajectory()` and attached `scoreTrajectory` to scored topics. * `src/extensions/trend-finder/schema.ts` - Added additive trajectory field needed for typed scoring output. **BQC Fixes**: * Contract alignment: trajectory output uses actual points only and a bounded defaultable schema branch. * Error information boundaries: invalid historical score timestamps are ignored without exposing raw parsing details. *** ### Task T006 - Add convergence and score trajectory schemas **Started**: 2026-06-13 01:43 **Completed**: 2026-06-13 01:44 **Duration**: 1 minute **Notes**: * Added bounded convergence state, source row, and topic field schemas with default unavailable state and strict object validation. * Added bounded score trajectory point and topic field schemas with default missing-history state. * New topic fields are additive and optional in the TypeScript `TrendTopic` surface, matching existing sparkline/velocity/lifecycle defaults. * Existing parser error mapping applies to malformed new branches through `mapTrendFinderSchemaError`. * Focused command passed: `bunx vitest run src/lib/__tests__/trend-finder-schema.test.ts`. **Files Changed**: * `src/extensions/trend-finder/schema.ts` - Added convergence and score trajectory constants, defaults, schemas, topic fields, and types. **BQC Fixes**: * Contract alignment: new branches are bounded, strict, defaultable, and legacy-compatible. * Error information boundaries: malformed branches fall back through schema catch/default handling or existing mapped parser issues. *** ### Task T007 - Add convergence and trajectory view-model projections **Started**: 2026-06-13 01:44 **Completed**: 2026-06-13 01:47 **Duration**: 3 minutes **Notes**: * Added convergence view models with state labels, lead role copy, lag labels, empty states, tones, and accessible summaries. * Added score trajectory view models with bounded SVG coordinates for actual points, current score labels, missing-history states, and labeled extrapolated slope guide metadata. * Wired both projections into topic card and selected-trend view models. * Focused command passed: `bunx vitest run src/extensions/trend-finder/__tests__/view-model.test.ts`. **Files Changed**: * `src/extensions/trend-finder/view-model.ts` - Added convergence and score trajectory view-model interfaces and projection helpers. **BQC Fixes**: * Contract alignment: exhaustive state handling uses `assertNever` for new convergence and trajectory states. * Accessibility and platform compliance: projected ARIA labels include state, lead/lag, actual point, and empty-state context. *** ### Task T008 - Add fixture convergence and trajectory states **Started**: 2026-06-13 01:47 **Completed**: 2026-06-13 01:48 **Duration**: 1 minute **Notes**: * Added detected, not-detected, unavailable, and single-source convergence fixture branches. * Added available score trajectory fixtures and explicit missing-history score trajectory state. * Fixture topic factory now defaults new additive branches for legacy-style fixture rows. * Focused commands passed: `bunx vitest run src/lib/__tests__/trend-finder-schema.test.ts` and `bunx vitest run src/extensions/trend-finder/__tests__/view-model.test.ts`. **Files Changed**: * `src/extensions/trend-finder/fixtures.ts` - Added convergence and score trajectory fixture states. **BQC Fixes**: * State freshness on re-entry: fixtures now exercise changing selected-topic states across detected, not-detected, unavailable, and single-source branches. * Contract alignment: fixture payloads parse through the new bounded schema defaults. *** ### Task T009 - Attach convergence to collector topics **Started**: 2026-06-13 01:48 **Completed**: 2026-06-13 01:50 **Duration**: 2 minutes **Notes**: * Imported the convergence helper into the Trend Finder collector. * Added convergence attachment immediately after source breakdown enrichment so final topic evidence IDs and source metadata stay aligned. * Added collector warning and trace warning path for convergence derivation failures without failing the full run. * Focused command passed: `bunx vitest run scripts/extensions/trend-finder/__tests__/collector.test.ts`. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Attached convergence to final topics after source breakdown enrichment. **BQC Fixes**: * Failure path completeness: convergence derivation failures produce collector warnings and trace warnings. * Contract alignment: collector emits the same additive convergence branch validated by the browser schema. *** ### Task T010 - Emit sanitized convergence and trajectory trace counters **Started**: 2026-06-13 01:50 **Completed**: 2026-06-13 01:51 **Duration**: 1 minute **Notes**: * Added aggregate convergence state counters and timestamped source counts to `scoring.completed` trace context. * Added score trajectory state and actual point counters to `scoring.completed` trace context. * Per-topic trace details include only states and counts, not source rows, raw source payloads, private paths, or raw history details. * Focused command passed: `bunx vitest run scripts/extensions/trend-finder/__tests__/collector.test.ts`. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added sanitized convergence and score trajectory trace counters. **BQC Fixes**: * Error information boundaries: trace context avoids raw timestamps beyond browser payload, source row details, private archive paths, and history internals. * Contract alignment: aggregate counter helper uses state-enumerated convergence output. *** ### Task T011 - Create convergence timeline component **Started**: 2026-06-13 01:51 **Completed**: 2026-06-13 01:53 **Duration**: 2 minutes **Notes**: * Added compact lead-lag convergence timeline component with detected, not-detected, single-source, unavailable, and empty-state rendering. * Rows use stable dimensions, truncated labels, source role text, first-seen labels, lag labels, and accessible row summaries. * Updated a manual dashboard test fixture to include the newly required topic projections. * Focused command passed: `bunx tsc --noEmit --pretty false`. **Files Changed**: * `src/extensions/trend-finder/components/convergence-timeline.tsx` - Created convergence timeline component. * `src/lib/__tests__/trend-finder-dashboard.test.tsx` - Updated manual topic view-model fixture with new projections. **BQC Fixes**: * Accessibility and platform compliance: component exposes section and row ARIA labels. * State freshness on re-entry: manual view-model fixture now includes convergence and trajectory projections for selected topic surfaces. *** ### Task T012 - Create score trajectory component **Started**: 2026-06-13 01:53 **Completed**: 2026-06-13 01:54 **Duration**: 1 minute **Notes**: * Added compact score trajectory component with fixed SVG viewBox, actual score point polyline, current score point, and dashed extrapolation guide. * The extrapolation guide is visibly labeled as extrapolated and no forecast point is rendered. * Missing-history state renders a stable empty panel. * Focused command passed: `bunx tsc --noEmit --pretty false`. **Files Changed**: * `src/extensions/trend-finder/components/score-trajectory.tsx` - Created actual-point score trajectory component. **BQC Fixes**: * Accessibility and platform compliance: component exposes role/ARIA text for available and missing-history states. * Contract alignment: component consumes view-model output and does not derive or publish forecast points. *** ### Task T013 - Wire timeline and trajectory into Signal Radar **Started**: 2026-06-13 01:54 **Completed**: 2026-06-13 01:55 **Duration**: 1 minute **Notes**: * Inserted convergence timeline and score trajectory panels into the selected-topic Signal Radar inspector. * Added selected-topic change revalidation by resetting local hover and tilt state when `topic.id` changes. * Focused command passed: `bunx tsc --noEmit --pretty false`. **Files Changed**: * `src/extensions/trend-finder/components/signal-radar.tsx` - Rendered timeline and trajectory panels and reset local visual state on selected topic changes. **BQC Fixes**: * State freshness on re-entry: hover/tilt state resets when a different selected topic is rendered. * Accessibility and platform compliance: wired components preserve their own ARIA labels inside the selected-topic inspector. *** ### Task T014 - Update committed example payload **Started**: 2026-06-13 01:55 **Completed**: 2026-06-13 01:57 **Duration**: 2 minutes **Notes**: * Added compact detected convergence and available score trajectory examples to the Trend Finder example topic. * Added explicit unavailable convergence and missing-history score trajectory examples to the legacy fallback topic. * Added one compact second source/evidence row so the detected convergence example is internally consistent. * JSON validation passed with `jq empty src/data/live-data.example.json`. * Focused command passed: `bunx vitest run src/lib/__tests__/trend-finder-schema.test.ts`. **Files Changed**: * `src/data/live-data.example.json` - Added browser-safe additive convergence and score trajectory examples. **BQC Fixes**: * Contract alignment: committed fallback payload exercises both available and unavailable new branches. * Error information boundaries: example uses public placeholder URLs only and no private paths or raw archives. *** ### Task T015 - Extend collector convergence tests **Started**: 2026-06-13 01:57 **Completed**: 2026-06-13 02:00 **Duration**: 3 minutes **Notes**: * Added collector coverage for unavailable convergence caused by missing/invalid source timestamps. * Added collector coverage for single-source convergence state. * Added aggregate warning coverage for missing timestamp convergence and sanitized trace counter assertions. * Focused command passed: `bunx vitest run scripts/extensions/trend-finder/__tests__/collector.test.ts`. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added aggregate missing-timestamp convergence warning. * `scripts/extensions/trend-finder/__tests__/collector.test.ts` - Added controlled convergence attachment and sanitized trace counter coverage. **BQC Fixes**: * Failure path completeness: missing timestamp convergence now has caller-visible aggregate warning coverage. * Error information boundaries: tests assert trace counters omit source names and private source details. *** ### Task T016 - Extend scoring trajectory tests **Started**: 2026-06-13 02:00 **Completed**: 2026-06-13 02:00 **Duration**: 1 minute **Notes**: * Added scoring coverage for bounded historical score trajectory points and current-score inclusion. * Added missing-history trajectory fallback coverage. * Added assertions that trajectory payloads do not include forecast, time-to-breakout, peak-day, or `tbts` fields. * Focused command passed: `bunx vitest run scripts/lib/ai-runtime/__tests__/scoring.test.ts`. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/scoring.test.ts` - Added score trajectory scoring tests. **BQC Fixes**: * Contract alignment: tests lock the actual-points-only trajectory contract. * Error information boundaries: tests prevent invented forecast labels and point estimates from entering scoring payloads. *** ### Task T017 - Extend schema tests **Started**: 2026-06-13 02:00 **Completed**: 2026-06-13 02:02 **Duration**: 2 minutes **Notes**: * Added schema tests for convergence and score trajectory legacy defaults. * Added bounded array and malformed branch fallback tests. * Added legacy minimal Trend Finder payload expectations for the new additive topic fields. * Focused command passed: `bunx vitest run src/lib/__tests__/trend-finder-schema.test.ts`. **Files Changed**: * `src/lib/__tests__/trend-finder-schema.test.ts` - Added convergence and score trajectory schema coverage. **BQC Fixes**: * Contract alignment: tests enforce strict branch bounds and legacy fallback defaults. *** ### Task T018 - Extend view-model tests **Started**: 2026-06-13 02:02 **Completed**: 2026-06-13 02:03 **Duration**: 1 minute **Notes**: * Added convergence view-model assertions for detected, not-detected, unavailable, lead role copy, lag labels, and ARIA text. * Added score trajectory view-model assertions for SVG points, current score labels, missing-history state, and extrapolation labels. * Focused command passed: `bunx vitest run src/extensions/trend-finder/__tests__/view-model.test.ts`. **Files Changed**: * `src/extensions/trend-finder/__tests__/view-model.test.ts` - Added convergence and trajectory projection coverage. **BQC Fixes**: * Accessibility and platform compliance: tests assert projected ARIA text and visible labels for new panels. * Contract alignment: tests lock lag labels, actual point projection, and extrapolation copy. *** ### Task T019 - Add convergence timeline component tests **Started**: 2026-06-13 02:03 **Completed**: 2026-06-13 02:04 **Duration**: 1 minute **Notes**: * Added component tests for detected convergence rows, empty unavailable state, ARIA labels, stable row height, and truncation classes. * Focused command passed: `bunx vitest run src/extensions/trend-finder/components/__tests__/convergence-timeline.test.tsx`. **Files Changed**: * `src/extensions/trend-finder/components/__tests__/convergence-timeline.test.tsx` - Added convergence timeline component coverage. **BQC Fixes**: * Accessibility and platform compliance: tests assert section and row labels. * Accessibility and platform compliance: tests confirm compact/truncation classes for dense and mobile-safe text behavior. *** ### Task T020 - Add score trajectory component tests **Started**: 2026-06-13 02:04 **Completed**: 2026-06-13 02:05 **Duration**: 1 minute **Notes**: * Added component tests for actual score point SVG rendering, current score labels, visible extrapolation labels, and missing-history empty state. * Focused command passed: `bunx vitest run src/extensions/trend-finder/components/__tests__/score-trajectory.test.tsx`. **Files Changed**: * `src/extensions/trend-finder/components/__tests__/score-trajectory.test.tsx` - Added score trajectory component coverage. **BQC Fixes**: * Accessibility and platform compliance: tests assert accessible labels for available and unavailable states. * Contract alignment: tests verify extrapolation is visibly labeled and actual SVG points are rendered. *** ### Task T021 - Run focused validation and record results **Started**: 2026-06-13 02:05 **Completed**: 2026-06-13 02:08 **Duration**: 3 minutes **Notes**: * Focused Vitest suite passed: 8 files, 204 tests. * App typecheck passed: `bunx tsc --noEmit --pretty false`. * Script typecheck passed: `bunx tsc --noEmit -p tsconfig.scripts.json --pretty false`. * Targeted Prettier check passed after formatting touched files. * ASCII-only and Unix LF scans passed for touched files. * Payload budget check passed: `src/data/live-data.example.json` is 41,865 bytes, under the shared 1 MB limit. **Files Changed**: * `.spec_system/specs/phase27-session07-convergence-detection-and-trajectory-visuals/implementation-notes.md` - Recorded final validation results. * `.spec_system/specs/phase27-session07-convergence-detection-and-trajectory-visuals/tasks.md` - Closed final task and completion checklist. **BQC Fixes**: * Contract alignment: focused runtime, schema, view-model, component, and dashboard tests pass. * Accessibility and platform compliance: component and dashboard validation includes ARIA-oriented assertions for the new panels. *** --- # Agent Instructions This documentation is published with GitBook. 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