> 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-session06-lifecycle-stage-taxonomy/implementation_summary.md). # Implementation Summary **Session ID**: `phase27-session06-lifecycle-stage-taxonomy` **Completed**: 2026-06-13 **Duration**: 1.3 hours *** ## Overview Session 06 completed the Trend Finder lifecycle stage taxonomy by deriving absolute maturity labels from existing browser-safe and script-safe signals. The runtime now classifies topics into `unknown`, `whisper`, `builder`, `creator`, and `saturated` stages using bounded saturation, recurrence, role-share, movement, and velocity-dynamics inputs. The browser contract stays additive and conservative. Legacy payloads parse as explicit `unknown`, trend cards render lifecycle chips with derivation notes, Signal Workbench exposes lifecycle filter/sort/table behavior, and Signal Radar colors data points by lifecycle stage while preserving fallback-node distinction. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ----------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------- | ----- | | `.spec_system/specs/phase27-session06-lifecycle-stage-taxonomy/spec.md` | Session scope and implementation contract. | 390 | | `.spec_system/specs/phase27-session06-lifecycle-stage-taxonomy/tasks.md` | 20-task checklist and completion tracker. | 94 | | `.spec_system/specs/phase27-session06-lifecycle-stage-taxonomy/implementation-notes.md` | Task-by-task implementation record. | 539 | | `.spec_system/specs/phase27-session06-lifecycle-stage-taxonomy/security-compliance.md` | Security and GDPR review. | 94 | | `.spec_system/specs/phase27-session06-lifecycle-stage-taxonomy/validation.md` | Validation report and quality gates. | 251 | | `scripts/lib/ai-runtime/lifecycle.ts` | Pure lifecycle classifier, thresholds, confidence, input summary, and notes. | 361 | | `scripts/lib/ai-runtime/__tests__/lifecycle.test.ts` | Classifier boundary, precedence, missing-input, and fallback tests. | 163 | | `src/extensions/trend-finder/components/lifecycle-chip.tsx` | Reusable lifecycle stage chip for cards and dense tables. | 37 | | `.spec_system/specs/phase27-session06-lifecycle-stage-taxonomy/IMPLEMENTATION_SUMMARY.md` | Session closeout summary. | 139 | ### Files Modified | File | Changes | | --------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------- | | `.spec_system/PRD/phase_27/PRD_phase_27.md` | Marked Session 06 complete, updated progress to 6/12, recorded completion details, and advanced upcoming work to Session 07. | | `.spec_system/state.json` | Added Session 06 to completed sessions and history; cleared current session. | | `package.json` | Bumped patch version from 0.1.308 to 0.1.309. | | `README.md` | Updated the displayed project version to 0.1.309. | | `scripts/lib/ai-runtime/scoring.ts` | Derived lifecycle after saturation, velocity, movement, and history context and attached it to scored topics. | | `scripts/extensions/trend-finder/collector.ts` | Added sanitized aggregate lifecycle counters to scoring trace output. | | `src/extensions/trend-finder/schema.ts` | Added bounded lifecycle enums, schemas, defaults, and additive topic field. | | `src/extensions/trend-finder/view-model.ts` | Added lifecycle labels, tones, derivation notes, accessibility copy, and radar color metadata. | | `src/extensions/trend-finder/components/trend-card.tsx` | Rendered lifecycle chips alongside existing topic status context. | | `src/extensions/trend-finder/signal-workbench-model.ts` | Added lifecycle row fields, filter facets, search text, sort key, and deterministic tie-breakers. | | `src/extensions/trend-finder/components/signal-workbench-controls.tsx` | Added the lifecycle filter control through the existing filter update path. | | `src/extensions/trend-finder/components/signal-workbench-table.tsx` | Added lifecycle table column and compact row chips. | | `src/extensions/trend-finder/components/signal-radar.tsx` | Recolored radar data points by lifecycle stage and added a compact stage legend. | | `src/extensions/trend-finder/fixtures.ts` | Added available and explicit unknown lifecycle states to fixtures. | | `src/data/live-data.example.json` | Added compact lifecycle examples and unknown fallback data. | | `scripts/lib/ai-runtime/__tests__/scoring.test.ts` | Covered lifecycle integration for builder, saturated, and unknown topics. | | `src/lib/__tests__/trend-finder-schema.test.ts` | Covered lifecycle defaults, malformed fallback, bounds, and legacy parsing. | | `src/extensions/trend-finder/__tests__/view-model.test.ts` | Covered lifecycle labels, tones, derivation notes, accessibility text, and radar color metadata. | | `src/extensions/trend-finder/__tests__/signal-workbench-model.test.ts` | Covered lifecycle row projection, search, facets, filtering, sorting, and stage order. | | `src/extensions/trend-finder/__tests__/signal-radar-projection.test.ts` | Covered radar lifecycle color metadata and lifecycle aria text. | | `src/extensions/trend-finder/components/__tests__/signal-workbench-view.test.tsx` | Covered visible lifecycle filter behavior and stage filtering. | *** ## Technical Decisions 1. **Pure runtime classification**: Lifecycle derivation lives in `scripts/lib/ai-runtime/lifecycle.ts`, keeping maturity math out of browser components. 2. **Conservative unknown fallback**: Missing saturation, role mix, source diversity, evidence, or short history produce explicit `unknown` notes instead of guessed maturity. 3. **Additive browser compatibility**: New schema fields default malformed or missing lifecycle branches to a bounded unknown object. 4. **Projected UI rendering**: Cards, Workbench, and Radar consume lifecycle view-model metadata rather than classifier internals. 5. **Sanitized trace output**: Collector logs only aggregate lifecycle counters, never raw archives, private paths, per-topic notes, or derivation inputs. *** ## Test Results | Metric | Value | | -------- | ------- | | Tests | 3387 | | Passed | 3387 | | Coverage | Not run | Commands validated: * `bun run test` - passed, 274 files and 3387 tests. * `bun run typecheck` - passed. * `bun run typecheck:scripts` - passed. * `bun run lint` - passed with 0 errors and 3 existing warnings outside session deliverables. * `bunx prettier --check [session files and touched code]` - passed. * `jq empty src/data/live-data.example.json` - passed. * `git diff --check` - passed. * Touched-file ASCII and CRLF validation - passed. *** ## Lessons Learned 1. Lifecycle needs an absolute maturity contract separate from movement, which remains a relative score-delta label. 2. Low-history and missing-source-role topics are safer as explicit `unknown` than as low-confidence mature stages. 3. Workbench lifecycle sorting needs an explicit stage order plus existing rank, score, name, and ID tie-breakers to stay deterministic. 4. Radar lifecycle colors need fallback-node treatment to remain visibly distinct from real topic data. *** ## Future Considerations Items for future sessions: 1. Session 07 can layer convergence and trajectory visuals on top of lifecycle stage context. 2. Session 08 can add `lifecycle_at_filing` and target lifecycle semantics for dated predictions. 3. A later calibration pass can adjust lifecycle thresholds after more daily series history accumulates. *** ## Session Statistics * **Tasks**: 20 completed * **Files Created**: 9 * **Files Modified**: 21 * **Tests Added**: 7 test files added or updated * **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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