> 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-session01-brief-movement-groups-and-calibration-metrics/implementation-notes.md). # Implementation Notes **Session ID**: `phase27-session01-brief-movement-groups-and-calibration-metrics` **Started**: 2026-06-12 19:54 **Last Updated**: 2026-06-12 20:24 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 20 / 20 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ## Task Log ### 2026-06-12 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** ### Task T001 - Verify analyzer state, prerequisites, and generated-data boundaries **Started**: 2026-06-12 19:53 **Completed**: 2026-06-12 19:54 **Duration**: 1 minute **Notes**: * Ran `.spec_system/scripts/analyze-project.sh --json`; active session resolved to `phase27-session01-brief-movement-groups-and-calibration-metrics`. * Ran `.spec_system/scripts/check-prereqs.sh --json --env` and `.spec_system/scripts/check-prereqs.sh --json --tools bun`; environment and Bun 1.3.14 passed. * Confirmed the session is additive and must not expose raw archives, prompts, provider responses, private paths, or local triage notes. **Files Changed**: * `.spec_system/specs/phase27-session01-brief-movement-groups-and-calibration-metrics/implementation-notes.md` - Created session progress log. **BQC Fixes**: * N/A - setup verification only. *** ### Task T002 - Inspect Trend Finder fixture, Brief, static export, and retro baselines **Started**: 2026-06-12 19:54 **Completed**: 2026-06-12 19:55 **Duration**: 1 minute **Notes**: * Reviewed fixtures, Brief view, static export, static renderer, and retro tests before code changes. * Confirmed existing Brief had headline/top cards and recent prediction/retro rows, but no movement grouping or aggregate calibration. **Files Changed**: * `.spec_system/specs/phase27-session01-brief-movement-groups-and-calibration-metrics/tasks.md` - Marked setup progress. **BQC Fixes**: * N/A - baseline inspection only. *** ### Task T003 - Extend prediction retro calibration schema, defaults, and types **Started**: 2026-06-12 19:55 **Completed**: 2026-06-12 19:57 **Duration**: 2 minutes **Notes**: * Added additive prediction retro calibration state and outcome count schemas. * Added unavailable defaults with bounded counts, nullable hit rate and Brier-style score, generated timestamp, and unavailable reason. * Extended `PredictionRetroSummarySchema` with a defaulted `calibration` object for legacy payload parsing. **Files Changed**: * `src/extensions/trend-finder/schema.ts` - Added calibration schema/defaults and exported types. **BQC Fixes**: * Trust boundary enforcement: New browser payload object is Zod-validated with bounded numeric ranges and string limits. * Contract alignment: Calibration defaults preserve legacy payload parsing. *** ### Task T004 - Add retro outcome aggregate and Brier-style calibration helpers **Started**: 2026-06-12 19:57 **Completed**: 2026-06-12 19:58 **Duration**: 1 minute **Notes**: * Added outcome count and calibration helper exports in `retros.ts`. * Pending rows count as tracking rows but are excluded from resolved hit rate and Brier-style scoring. * Empty and pending-only inputs return explicit unavailable states. * Ran `bun run test scripts/lib/ai-runtime/__tests__/retros.test.ts -t "retros module"`; passed 18 active tests. **Files Changed**: * `scripts/lib/ai-runtime/retros.ts` - Added aggregate and calibration helper exports. **BQC Fixes**: * Failure path completeness: Empty and pending-only inputs do not produce fake accuracy values. * Contract alignment: Helpers return the schema-backed calibration shape. *** ### Task T005 - Add shared Brief and calibration view-model helpers **Started**: 2026-06-12 19:58 **Completed**: 2026-06-12 20:02 **Duration**: 4 minutes **Notes**: * Added shared confidence band, movement group, today's pick, and calibration view models. * Added a defensive calibration fallback for legacy-shaped in-memory objects. * Ran `bun run test src/extensions/trend-finder/__tests__/view-model.test.ts`; passed 14 tests. **Files Changed**: * `src/extensions/trend-finder/view-model.ts` - Added shared presentation helpers. **BQC Fixes**: * Contract alignment: Shared helpers centralize labels for live and static consumers. * Error information boundaries: Display copy is sanitized and bounded before rendering. *** ### Task T006 - Define projected Static Brief fields **Started**: 2026-06-12 20:02 **Completed**: 2026-06-12 20:04 **Duration**: 2 minutes **Notes**: * Added strict projected schemas for today's pick, movement groups, confidence band context, and calibration. * Added compatibility defaults for new top-level report sections and nested prediction retro calibration. * Ran `bun run test scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts`; passed 7 tests. **Files Changed**: * `scripts/extensions/trend-finder/static-brief-export.ts` - Added bounded schemas and projection fields. **BQC Fixes**: * Trust boundary enforcement: New static report fields are Zod-validated with limits before rendering. * Error information boundaries: Projection uses sanitized, bounded view-model strings. *** ### Task T007 - Update Trend Finder fixtures for calibration states **Started**: 2026-06-12 20:04 **Completed**: 2026-06-12 20:05 **Duration**: 1 minute **Notes**: * Added filled calibration to the main fixture. * Kept empty prediction retro fixture on the default summary, now including unavailable calibration. * Added a legacy omitted-field fixture for regression tests. * Ran `bun run test src/extensions/trend-finder/__tests__/view-model.test.ts`; passed 14 tests. **Files Changed**: * `src/extensions/trend-finder/fixtures.ts` - Added filled and omitted calibration fixture coverage. **BQC Fixes**: * Contract alignment: Fixtures now cover filled, empty, and omitted calibration shapes. *** ### Task T008 - Wire live collector prediction retro summary calibration **Started**: 2026-06-12 20:05 **Completed**: 2026-06-12 20:07 **Duration**: 2 minutes **Notes**: * Wired live collector calibration from previously loaded retro archive rows plus current-run retro rows. * Kept recent prediction and retro arrays bounded through existing browser capping helpers. * Updated a stale collector test expectation to use `DEFAULT_PREDICTION_RETRO_SUMMARY`. * Ran `bun run test scripts/extensions/trend-finder/__tests__/collector.test.ts`; passed 20 tests. **Files Changed**: * `scripts/extensions/trend-finder/collector.ts` - Added calibration to live prediction retro summary. * `scripts/extensions/trend-finder/__tests__/collector.test.ts` - Updated empty-summary expectation. **BQC Fixes**: * Failure path completeness: Archive read/write failures continue to warn and fall back. * Error information boundaries: Browser state receives aggregate calibration only. *** ### Task T009 - Wire backtest publish prediction retro calibration **Started**: 2026-06-12 20:07 **Completed**: 2026-06-12 20:08 **Duration**: 1 minute **Notes**: * Added calibration to backtest window snapshots from generated backtest retros and window timestamp. * Ran `bun run test scripts/lib/ai-runtime/__tests__/backtests.test.ts`; passed 9 tests. **Files Changed**: * `scripts/lib/ai-runtime/backtests.ts` - Added calibration to backtest summary construction. **BQC Fixes**: * Error information boundaries: Backtest snapshots publish aggregate calibration only. *** ### Task T010 - Wire backhistory replay prediction retro calibration **Started**: 2026-06-12 20:08 **Completed**: 2026-06-12 20:09 **Duration**: 1 minute **Notes**: * Added calibration to backhistory replay snapshots using replay retros and generated timestamp. * Ran `bun run test scripts/extensions/trend-finder/__tests__/historical-backhistory-flow.test.ts`; passed 1 test. **Files Changed**: * `scripts/trend-finder-replay-backhistory.ts` - Added calibration to replay summary construction. **BQC Fixes**: * Contract alignment: Replay snapshots emit the same additive calibration contract as live and backtest paths. *** ### Task T011 - Render today's pick in Brief **Started**: 2026-06-12 20:09 **Completed**: 2026-06-12 20:11 **Duration**: 2 minutes **Notes**: * Replaced old headline panels with a `Today's pick` visibility panel. * Rendered deterministic reason, score, movement, confidence band with percentage, source count, and creator/lens copy. * Preserved existing Brief visibility semantics by selecting from the same ranked topic set. * Ran focused UI tests; passed 34 tests. **Files Changed**: * `src/extensions/trend-finder/views/brief-view.tsx` - Added today's pick panel. **BQC Fixes**: * Accessibility and platform compliance: Today's pick has accessible section labeling and visibility controls. * State freshness on re-entry: Pick is derived from current visible topic state. *** ### Task T012 - Render Brief movement groups **Started**: 2026-06-12 20:11 **Completed**: 2026-06-12 20:12 **Duration**: 1 minute **Notes**: * Added a `Movement groups` visibility panel with moved-up, cooled, and emerging groups. * Groups use existing movement status/analysis view models and preserve visible ranked order. * Ran focused UI tests; passed 34 tests. **Files Changed**: * `src/extensions/trend-finder/views/brief-view.tsx` - Added movement group panel and rows. **BQC Fixes**: * Contract alignment: Movement groups use existing movement data without new movement math. * Accessibility and platform compliance: Groups are rendered as labeled sections and lists. *** ### Task T013 - Render calibration summary in Brief prediction/retro section **Started**: 2026-06-12 20:12 **Completed**: 2026-06-12 20:13 **Duration**: 1 minute **Notes**: * Added calibration panel with hit rate, Brier-style score, total/resolved counts, outcome counts, and timestamp. * Unavailable and pending-only states render explicit copy. * Ran focused UI tests; passed 34 tests. **Files Changed**: * `src/extensions/trend-finder/views/brief-view.tsx` - Added calibration panel. **BQC Fixes**: * Failure path completeness: Missing resolved retros render unavailable copy instead of zero accuracy metrics. * Accessibility and platform compliance: Calibration panel exposes an aria label. *** ### Task T014 - Replace raw TrendCard confidence with shared band labels **Started**: 2026-06-12 20:13 **Completed**: 2026-06-12 20:14 **Duration**: 1 minute **Notes**: * Updated TrendCard confidence to use shared band labels while preserving percentage context. * Ran focused UI tests; passed 30 tests. **Files Changed**: * `src/extensions/trend-finder/components/trend-card.tsx` - Replaced raw confidence metric. **BQC Fixes**: * Contract alignment: TrendCard now uses the same confidence helper as Brief and Static Brief. *** ### Task T015 - Render projected Static Brief sections **Started**: 2026-06-12 20:14 **Completed**: 2026-06-12 20:15 **Duration**: 1 minute **Notes**: * Rendered projected today's pick, movement groups, confidence bands, and calibration in Static Brief HTML. * Existing renderer escaping is used for all new projected text and attributes. * Ran `bun run test scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts`; passed 4 tests. **Files Changed**: * `scripts/extensions/trend-finder/static-brief-renderer.ts` - Rendered new static sections. **BQC Fixes**: * Error information boundaries: Renderer consumes projected report fields only and escapes output. * Accessibility and platform compliance: Static sections use headings and labels. *** ### Task T016 - Add retro aggregate and calibration tests **Started**: 2026-06-12 20:15 **Completed**: 2026-06-12 20:16 **Duration**: 1 minute **Notes**: * Added tests for outcome counts, Brier-style math, pending exclusion, pending-only state, and empty state. * Ran `bun run test scripts/lib/ai-runtime/__tests__/retros.test.ts`; passed 26 tests. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/retros.test.ts` - Added aggregate and calibration coverage. **BQC Fixes**: * Contract alignment: Tests pin pending exclusion and unavailable states. *** ### Task T017 - Add view-model tests for Brief helpers and calibration labels **Started**: 2026-06-12 20:16 **Completed**: 2026-06-12 20:17 **Duration**: 1 minute **Notes**: * Added tests for confidence thresholds, movement group ordering, today's pick reason, and calibration labels. * Ran `bun run test src/extensions/trend-finder/__tests__/view-model.test.ts`; passed 17 tests. **Files Changed**: * `src/extensions/trend-finder/__tests__/view-model.test.ts` - Added Brief helper and calibration label tests. **BQC Fixes**: * Contract alignment: Tests pin shared presentation contracts. *** ### Task T018 - Add schema regression tests for omitted calibration **Started**: 2026-06-12 20:17 **Completed**: 2026-06-12 20:18 **Duration**: 1 minute **Notes**: * Updated legacy default expectations and added omitted-calibration and populated-calibration assertions. * Ran `bun run test src/lib/__tests__/trend-finder-schema.test.ts`; passed 80 tests. **Files Changed**: * `src/lib/__tests__/trend-finder-schema.test.ts` - Added calibration schema coverage. **BQC Fixes**: * Trust boundary enforcement: Tests verify additive defaults at the payload boundary. *** ### Task T019 - Add Static Brief export and renderer tests **Started**: 2026-06-12 20:18 **Completed**: 2026-06-12 20:19 **Duration**: 1 minute **Notes**: * Added static export assertions for today's pick, movement groups, and calibration projection. * Added renderer assertions for new panels, confidence labels, calibration copy, and unavailable empty states. * Ran static export and renderer tests; passed 11 tests. **Files Changed**: * `scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts` - Added projected section assertions. * `scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts` - Added rendered section assertions. **BQC Fixes**: * Error information boundaries: Tests verify projected rendering and retained private path checks. *** ### Task T020 - Run focused tests, typechecks, full tests, and ASCII validation **Started**: 2026-06-12 20:19 **Completed**: 2026-06-12 20:24 **Duration**: 5 minutes **Notes**: * Ran focused touched-area tests; passed 11 files and 204 tests. * Ran `bun run typecheck`; passed. * Ran `bun run typecheck:scripts`; passed. * Ran `bun run test`; passed 267 files and 3322 tests. * Ran focused Prettier check on touched code/test files; passed after mechanical formatting. * Ran ASCII validation over touched code/test files and active session files; no non-ASCII characters found. **Files Changed**: * `.spec_system/specs/phase27-session01-brief-movement-groups-and-calibration-metrics/tasks.md` - Marked final verification and completion checklist complete. * `.spec_system/specs/phase27-session01-brief-movement-groups-and-calibration-metrics/implementation-notes.md` - Logged final verification. **BQC Fixes**: * Contract alignment: Final typechecks and full test suite validate updated browser/script contracts. *** ## Verification Summary * `bun run test scripts/lib/ai-runtime/__tests__/retros.test.ts src/extensions/trend-finder/__tests__/view-model.test.ts src/lib/__tests__/trend-finder-schema.test.ts scripts/extensions/trend-finder/__tests__/collector.test.ts scripts/lib/ai-runtime/__tests__/backtests.test.ts scripts/extensions/trend-finder/__tests__/historical-backhistory-flow.test.ts scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts src/lib/__tests__/trend-finder-dashboard.test.tsx src/extensions/trend-finder/__tests__/visibility-views.test.tsx src/extensions/trend-finder/components/__tests__/signal-workbench-view.test.tsx` - passed 11 files, 204 tests. * `bun run typecheck` - passed. * `bun run typecheck:scripts` - passed. * `bun run test` - passed 267 files, 3322 tests. * `bunx prettier --check ...` on touched code/test files - passed. * ASCII validation on touched code/test files and active session files - passed. *** ## Blockers & Solutions No blockers. *** ## Design Decisions ### Decision 1: Additive Calibration Contract **Context**: Legacy Trend Finder payloads and snapshots omit calibration. **Chosen**: Add a defaulted `calibration` object under `predictionRetroSummary`. **Rationale**: Browser, script, static export, and legacy snapshots continue parsing while new reports can render aggregate accountability metrics. ### Decision 2: Pending Rows Are Tracking Rows **Context**: Pending retros indicate unresolved predictions and should not reduce accuracy metrics. **Chosen**: Count pending rows in outcome counts but exclude them from resolved hit rate and Brier-style score. **Rationale**: This keeps unresolved records visible without presenting fake accuracy numbers. ### Decision 3: Project Before Static Rendering **Context**: Static Brief must stay browser-safe and privacy-safe. **Chosen**: Project today's pick, movement groups, confidence labels, and calibration into strict static report fields before rendering. **Rationale**: The renderer consumes bounded projected fields only and does not read raw Trend Finder payloads or private archives. --- # Agent Instructions This documentation is published with GitBook. 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