> 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-session08-dated-predictions-and-story-log/implementation_summary.md). # Implementation Summary **Session ID**: `phase27-session08-dated-predictions-and-story-log` **Completed**: 2026-06-13 **Duration**: 0.8 hours *** ## Overview Completed Phase 27 Session 08 by extending Trend Finder prediction history with dated, lifecycle-targeted predictions and a bounded Story Log surface. The work keeps prediction and retro archives private while exposing browser-safe summary rows, target-date-aware due states, Watchlist filtering, Brief summaries, and sanitized Engine Replay counters. *** ## Deliverables ### Files Created | File | Purpose | Lines | | --------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------- | ----- | | `src/extensions/trend-finder/components/story-log-panel.tsx` | Filterable Story Log panel for verdict and due-state history. | 207 | | `src/extensions/trend-finder/components/__tests__/story-log-panel.test.tsx` | Component coverage for filters, empty states, ARIA labels, reset behavior, and row rendering. | 112 | ### Files Modified | File | Changes | | ------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | | `.spec_system/PRD/phase_27/PRD_phase_27.md` | Marked Session 08 complete and updated Phase 27 progress. | | `.spec_system/state.json` | Marked current session complete and cleared active session. | | `README.md` | Synced visible version line to `0.1.311`. | | `package.json` | Bumped version to `0.1.311`. | | `src/extensions/trend-finder/schema.ts` | Added dated prediction fields, retro due state, Story Log schema, bounds, and defaults. | | `scripts/lib/ai-runtime/predictions.ts` | Added dated prompt validation, deterministic fallback buckets, lifecycle targets, sanitization, and archive parsing. | | `scripts/lib/ai-runtime/retros.ts` | Added target-date eligibility, not-yet-due pending behavior, stale handling, and calibration filtering. | | `scripts/extensions/trend-finder/collector.ts` | Wired lifecycle candidates, built capped Story Log projection, and emitted sanitized trace counters. | | `src/extensions/trend-finder/view-model.ts` | Added Story Log labels, filter metadata, normalized filters, counts, sorting, and row projection. | | `src/extensions/trend-finder/views/watchlist-view.tsx` | Rendered Story Log panel in the prediction-history area. | | `src/extensions/trend-finder/views/brief-view.tsx` | Added compact prediction-history summary. | | `src/extensions/trend-finder/fixtures.ts` | Added dated prediction, retro, Story Log, malformed, and legacy fixture states. | | `src/data/live-data.example.json` | Added compact browser-safe dated prediction and Story Log example data. | | `src/extensions/trend-finder/engine-trace.ts` | Added `prediction-history` artifact ID. | | `src/extensions/trend-finder/engine-replay-model.ts` | Added artifact title and description. | | `src/extensions/trend-finder/components/engine-artifact-rail.tsx` | Added artifact icon mapping. | | `scripts/lib/ai-runtime/backtests.ts` | Preserved `storyLog` in backtest snapshot summaries. | | `scripts/trend-finder-replay-backhistory.ts` | Preserved `storyLog` in replay snapshot summaries. | | `scripts/lib/ai-runtime/__tests__/predictions.test.ts` | Covered dated fallback, AI validation, sanitization, lifecycle errors, and legacy archives. | | `scripts/lib/ai-runtime/__tests__/retros.test.ts` | Covered target-date grading, stale behavior, disappeared topics, mode preservation, and calibration math. | | `scripts/extensions/trend-finder/__tests__/collector.test.ts` | Covered lifecycle wiring, Story Log projection, bounds, fallback behavior, and sanitized trace counters. | | `scripts/extensions/trend-finder/__tests__/historical-backhistory-flow.test.ts` | Updated replay expectations for dated not-yet-due predictions. | | `src/lib/__tests__/trend-finder-schema.test.ts` | Covered additive defaults, malformed Story Log rows, caps, and legacy parsing. | | `src/extensions/trend-finder/__tests__/view-model.test.ts` | Covered Story Log filter counts, ordering, due states, and empty states. | *** ## Technical Decisions 1. **Additive dated contracts**: Dated prediction fields are optional and schema-defaulted so legacy browser payloads and archives continue to parse. 2. **Target-date gate before grading**: Not-yet-due predictions stay pending and are excluded from retro AI prompts, stale pressure, and resolved calibration counts until their target date is due. 3. **Browser-safe Story Log projection**: Story Log rows are capped, sanitized, and projected from archives without raw archive paths, prompts, provider responses, private cache rows, or unbounded payloads. 4. **Shared view-model projection**: Watchlist and Brief consume the same Story Log view model so labels, filters, row ordering, and due-state copy stay consistent. *** ## Test Results | Metric | Value | | -------- | ------------------------------------------------------------------ | | Tests | 3,428 | | Passed | 3,428 | | Coverage | Statements 85.81%, Branches 76.01%, Functions 92.07%, Lines 88.57% | *** ## Lessons Learned 1. Dated prediction semantics need explicit due-state fields on both runtime retros and direct test records, otherwise browser and script contracts drift. 2. Calibration should treat not-yet-due pending rows as unresolved, even when they are valid records in the private prediction-history timeline. 3. Engine Replay proof is safest as aggregate counters for prediction history; row-level archive content belongs only in private runtime files. *** ## Future Considerations Items for future sessions: 1. Session 09 can reuse lifecycle and Story Log context when adding competitor and creator-angle analysis fields. 2. Demand and theme sessions should keep derived or estimated fields explicitly labeled to avoid importing Alpha Radar's invented precision. 3. Future source additions should stay outside this phase unless a source compliance document is created first. *** ## Session Statistics * **Tasks**: 22 completed * **Files Created**: 2 * **Files Modified**: 24 * **Tests Added**: 1 component test file plus expanded runtime, collector, schema, and view-model coverage * **Blockers**: 0 resolved --- # 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. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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