> 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/phase28-session04-topic-noise-gate-and-visibility-bands/implementation_summary.md). # Implementation Summary **Session ID**: `phase28-session04-topic-noise-gate-and-visibility-bands` **Completed**: 2026-06-14 **Duration**: 1.25 hours *** ## Overview Completed Phase 28 Session 04 by adding a deterministic topic-quality and visibility layer for Trend Finder. The session now scores topic clarity and noise risk, derives display-only visibility bands with bounded reason codes, downranks low-signal topics without deleting payload rows, preserves early hidden gems, and exposes the results in Trends, Trend cards, Signal Workbench, fixtures, tests, and documentation. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- | ----- | | `scripts/lib/ai-runtime/topic-quality.ts` | Pure topic-quality, noise-risk, visibility-band, downrank, and hidden-gem rescue helper | 808 | | `scripts/lib/ai-runtime/__tests__/topic-quality.test.ts` | Focused helper tests for scoring, visibility reasons, rescue behavior, and invalid-input issues | 181 | | `src/extensions/trend-finder/components/suppressed-noise-summary.tsx` | Trends suppressed-noise summary and show/hide control | 117 | | `src/extensions/trend-finder/components/__tests__/suppressed-noise-summary.test.tsx` | Component coverage for summary counts and control behavior | 71 | | `.spec_system/specs/phase28-session04-topic-noise-gate-and-visibility-bands/spec.md` | Session specification | 363 | | `.spec_system/specs/phase28-session04-topic-noise-gate-and-visibility-bands/tasks.md` | Session task checklist | 97 | | `.spec_system/specs/phase28-session04-topic-noise-gate-and-visibility-bands/implementation-notes.md` | Implementation and validation notes | 550 | | `.spec_system/specs/phase28-session04-topic-noise-gate-and-visibility-bands/security-compliance.md` | Security and GDPR review | 88 | | `.spec_system/specs/phase28-session04-topic-noise-gate-and-visibility-bands/validation.md` | Validation report | 263 | | `.spec_system/specs/phase28-session04-topic-noise-gate-and-visibility-bands/IMPLEMENTATION_SUMMARY.md` | Session closeout summary | 126 | ### Files Modified | File | Changes | | ------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- | | `scripts/lib/ai-runtime/scoring.ts` | Wired topic quality into scored topic construction, final score downrank, fallback caps, risk flags, and payload fields | | `scripts/lib/ai-runtime/risk-flags.ts` | Added generic-or-vague and high-noise topic risk flags | | `scripts/lib/ai-runtime/__tests__/scoring.test.ts` | Added scoring integration coverage for quality, downrank, fallback caps, and payload retention | | `scripts/lib/ai-runtime/__tests__/scoring-calibration.test.ts` | Updated scoring-version and noise-downrank assertions | | `src/extensions/trend-finder/schema.ts` | Added bounded quality, visibility, reason-code, downrank, and rescue parser fields with legacy defaults | | `src/extensions/trend-finder/view-model.ts` | Added topic-quality labels, visibility labels, reason labels, and suppressed-summary projection | | `src/extensions/trend-finder/components/trend-card.tsx` | Rendered quality, noise, gate, visibility, and rescue chips | | `src/extensions/trend-finder/views/trends-view.tsx` | Default-hid suppressed/rejected topics and handled suppressed-topic deep links | | `src/extensions/trend-finder/signal-workbench-model.ts` | Added visibility/noise fields, filters, facets, sort keys, and search text | | `src/extensions/trend-finder/components/signal-workbench-controls.tsx` | Added native Noise and Visibility filter controls | | `src/extensions/trend-finder/fixtures.ts` | Added representative quality, suppression, and rescued hidden-gem fixture rows | | `src/extensions/trend-finder/__tests__/view-model.test.ts` | Added legacy parser, label, and suppressed-summary coverage | | `src/extensions/trend-finder/__tests__/signal-workbench-model.test.ts` | Added Workbench visibility/noise filtering and sorting coverage | | `docs/extensions/trend-finder-scoring.md` | Documented shipped topic-quality, visibility, reason-code, suppression, and rescue behavior | | `.spec_system/state.json` | Marked Session 04 complete and cleared the active session | | `.spec_system/PRD/phase_28/PRD_phase_28.md` | Updated Phase 28 progress to 4/15 sessions | | `.spec_system/PRD/phase_28/session_04_topic_noise_gate_and_visibility_bands.md` | Marked the session complete | | `package.json` | Bumped package version from `0.1.321` to `0.1.322` | | `README.md` | Updated version line to `0.1.322` | | `docs/CHANGELOG.md` | Added the Session 04 release entry | *** ## Technical Decisions 1. **Display-only suppression**: Low-signal topics remain in the payload and can be shown explicitly, preserving Trend Finder transparency. 2. **Bounded browser fields**: The browser receives enums, counts, short labels, reason codes, booleans, and scores only; no raw source data, prompts, private paths, or unbounded text are exposed. 3. **Legacy-safe parsing**: Missing or malformed quality fields default to neutral pass/watch values so old generated payloads keep parsing. 4. **Early-hidden-gem rescue**: The quality gate preserves low-saturation hidden gems that meet current hidden-gem criteria and are not high-noise, stale, or unsupported. *** ## Test Results | Metric | Value | | -------- | ------------- | | Tests | 3516 | | Passed | 3516 | | Coverage | Not collected | Final validation commands: * `bun run test` - PASS, 288 files / 3516 tests. * `bun run typecheck` - PASS. * `bun run typecheck:scripts` - PASS. * `bun run lint` - PASS. * ASCII and LF scans - PASS. * Manual browser spot check - PASS for Trends suppressed summary and Workbench filters. *** ## Lessons Learned 1. Suppressed-topic deep links need to reveal suppressed rows before selecting the target, otherwise valid hash targets silently fall back to visible rows. 2. Score calibration tests must move with scoring-version changes whenever a new post-confidence adjustment lands. 3. The bounded reason-code layer gives operators useful suppression context without weakening the browser-safe payload boundary. *** ## Future Considerations Items for future sessions: 1. Session 05 should consume the visibility outputs while adding signal-aging half-lives and saturation refinement. 2. Session 06 should migrate the bounded noise downrank into named contribution rows when the shared contribution convention lands. 3. Session 08 should consume visibility bands and reason codes in the per-topic action verdict and consistency QA layer. *** ## Session Statistics * **Tasks**: 23 completed * **Files Created**: 10 * **Files Modified**: 20 * **Tests Added**: 4 files * **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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