> 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/phase33-session03-harden-trend-finder-projection/implementation_summary.md). # Implementation Summary **Session ID**: `phase33-session03-harden-trend-finder-projection` **Completed**: 2026-06-25 **Duration**: 3-4 hours *** ## Overview Hardened the Cloudflare Pages public demo Trend Finder projection so frozen real output keeps useful public product proof while staying static-only and privacy-safe. The exporter now validates Trend Finder input/output, retains relationship-aware topic/evidence/source sets, preserves advanced artifacts and sanitized Engine Replay summaries, and fails explicitly when generated local LiveData cannot be projected coherently. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ----------------------------------------------------------------------------------------------- | ------------------------ | ----- | | `.spec_system/specs/phase33-session03-harden-trend-finder-projection/IMPLEMENTATION_SUMMARY.md` | Session closeout summary | \~73 | ### Files Modified | File | Changes | | --------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `scripts/lib/pages-demo-snapshot.ts` | Added parser-backed Trend Finder projection, retained-reference filtering, Engine Replay preservation, provenance projection, manifest count/policy updates, and fatal generated-data projection failures. | | `scripts/lib/__tests__/pages-demo-snapshot.test.ts` | Added populated Trend Finder fixture coverage for positive parse/counts, reference coherence, privacy redaction, and no-fallback behavior. | | `demo-website/public/demo/live-data.snapshot.json` | Regenerated public fixture with 8 topics, 32 evidence rows, 5 industry events, 1 run narrative, 8 movement rows, and sanitized Engine Replay data. | | `demo-website/public/demo/snapshot-metadata.json` | Regenerated metadata with updated counts, scan status, and field policy references. | | `demo-website/snapshot-manifest.json` | Regenerated manifest with expanded Trend Finder field policy and count summary. | | `.spec_system/specs/phase33-session03-harden-trend-finder-projection/implementation-notes.md` | Recorded task evidence, count deltas, assumptions, and verification results. | *** ## Technical Decisions 1. **Parser-backed projection boundary**: Invalid generated Trend Finder input or projected output now maps to explicit snapshot errors instead of silently falling back to empty/default payloads. 2. **Relationship-aware retention**: Topics select cited evidence first, evidence selects retained sources, and dependent artifacts are filtered through the same retained ID sets. 3. **Schema-valid frozen demo labels**: Frozen real demo meaning is carried in public labels and notes while serialized provenance states remain within existing schema values. 4. **Fatal generated-data projection failures**: `projection_invalid` from generated local LiveData is rethrown so required sanitized Engine Replay preservation cannot be masked by the example fixture. *** ## Test Results | Metric | Value | | -------- | ------------------------------ | | Tests | 4283 | | Passed | 4283 | | Coverage | 86.2% statements, 88.77% lines | Additional passed gates: focused snapshot/privacy tests, snapshot dry run, fixture privacy scan, script typecheck, ESLint, Prettier, JSON parse, deterministic dry-run diff, whitespace, ASCII, and LF checks. *** ## Lessons Learned 1. The Trend Finder branch must validate both input and projected output because `parseTrendFinderData()` can otherwise hide invalid data behind empty defaults. 2. Public snapshot retention needs a shared ID contract; independently slicing artifact arrays creates broken references. 3. Demo provenance should avoid new state strings and express frozen real-output context through labels, notes, metadata, and manifest policy. *** ## Future Considerations Items for future sessions: 1. Harden the Dream Review public projection with the same allowlist and privacy discipline in Session 04. 2. Polish public demo UI labels for frozen data and disabled hosted runtime states in Session 05. 3. Run Pages build, route smoke, bundle budget, fixture scan, and deploy verification in Session 06. *** ## Session Statistics * **Tasks**: 16 completed * **Files Created**: 1 * **Files Modified**: 6 * **Tests Added**: 4 focused coverage areas * **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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