> 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/phase29-session04-corroboration-gate/implementation-notes.md). # Implementation Notes **Session ID**: `phase29-session04-corroboration-gate` **Started**: 2026-06-19 22:19 **Last Updated**: 2026-06-19 22:49 *** ### Validate Workflow - 2026-06-19 **Result**: PASS **Validation fixes applied**: * `scripts/lib/ai-runtime/action-consistency.ts` now uses the canonical `TREND_TOPIC_RISK_FLAGS` contract so `originator-only` risk flags are accepted by action consistency QA. * `scripts/lib/ai-runtime/__tests__/scoring-calibration.test.ts` now expects the neutral `corroboration_gate` adjustment row added by this session. **Final validation commands**: * `bun run test` - 317 files passed, 3,734 tests passed. * `bun run typecheck` - Passed. * `bun run typecheck:scripts` - Passed. * `bun run lint` - Passed. * `bunx prettier --check ...session source/test/doc files...` - Passed. * `bun run scripts/extensions/trend-finder/measure-payload-size.ts src/data/live-data.example.json --all --json` - Trend Finder browser data payload 14,138 bytes; boundary 1,048,576 bytes. * ASCII validation over changed and untracked files - Passed. **Reports written**: * `.spec_system/specs/phase29-session04-corroboration-gate/security-compliance.md` * `.spec_system/specs/phase29-session04-corroboration-gate/validation.md` ## Session Progress | Metric | Value | | ------------------- | --------- | | Tasks Completed | 22 / 22 | | Estimated Remaining | 0 minutes | | Blockers | 0 | *** ## Task Log ### 2026-06-19 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** ### Task T001 - Verify analyzer state, prerequisites, and Session 04 scope **Started**: 2026-06-19 22:17 **Completed**: 2026-06-19 22:19 **Duration**: 2 minutes **Notes**: * Ran the spec analyzer and confirmed current session `phase29-session04-corroboration-gate`. * Verified Session 04 PRD stub scope, completed prerequisite references in `spec.md`, and required Bun tooling. **Files Changed**: * `.spec_system/specs/phase29-session04-corroboration-gate/implementation-notes.md` - Started implementation log. *** ### Task T002 - Verify current source-local, signal-identity, scoring, and action-priority flow **Started**: 2026-06-19 22:18 **Completed**: 2026-06-19 22:19 **Duration**: 1 minute **Notes**: * Confirmed source breakdowns attach role shares, consensus, attention, reception, and risk flags after topic scoring. * Confirmed source-local metadata, competitor matches, and signal identity metadata are existing reviewed inputs. * Confirmed scoring uses named post-factor score adjustments and action priority owns caps, warnings, and next-step copy. **Files Changed**: * `.spec_system/specs/phase29-session04-corroboration-gate/implementation-notes.md` - Logged setup verification. *** ### Task T003 - Create corroboration helper contract **Started**: 2026-06-19 22:19 **Completed**: 2026-06-19 22:23 **Duration**: 4 minutes **Notes**: * Added a schema-validated corroboration helper input contract with reviewed identity inputs and explicit unavailable fallback behavior. **Files Changed**: * `scripts/lib/ai-runtime/corroboration.ts` - Created helper contract and bounded output projection. *** ### Task T004 - Add corroboration schema defaults **Started**: 2026-06-19 22:19 **Completed**: 2026-06-19 22:22 **Duration**: 3 minutes **Notes**: * Added corroboration constants, default object, topic schema field, and legacy-safe parsing. **Files Changed**: * `src/extensions/trend-finder/schema.ts` - Added corroboration schema and topic field. *** ### Task T005 - Add originator-only contracts **Started**: 2026-06-19 22:20 **Completed**: 2026-06-19 22:24 **Duration**: 4 minutes **Notes**: * Added `originator-only`, `corroboration_gate`, and originator-only action warning/cap enum values with schema parsing. **Files Changed**: * `src/extensions/trend-finder/schema.ts` - Added risk, score-adjustment, action reason, and action cap contracts. * `scripts/lib/ai-runtime/action-priority.ts` - Added action-priority input parsing support. *** ### Task T006 - Prepare source-breakdown wiring **Started**: 2026-06-19 22:23 **Completed**: 2026-06-19 22:25 **Duration**: 2 minutes **Notes**: * Added identity evidence input support and deterministic `originator-only` risk flag merging. **Files Changed**: * `scripts/lib/ai-runtime/source-breakdown.ts` - Added corroboration wiring and risk merge. * `scripts/extensions/trend-finder/collector.ts` - Passed analyst identity evidence to source-breakdown derivation. * `scripts/trend-finder-replay-backhistory.ts` - Passed replay analyst evidence to source-breakdown derivation. *** ### Task T007 - Prepare scoring and action-priority inputs **Started**: 2026-06-19 22:23 **Completed**: 2026-06-19 22:26 **Duration**: 3 minutes **Notes**: * Added corroboration-aware scoring input and action-priority input parsing. **Files Changed**: * `scripts/lib/ai-runtime/scoring.ts` - Added corroboration post-factor adjustment plumbing. * `scripts/lib/ai-runtime/action-priority.ts` - Added corroboration action input parsing. *** ### Task T008 - Add corroboration view-model copy **Started**: 2026-06-19 22:25 **Completed**: 2026-06-19 22:27 **Duration**: 2 minutes **Notes**: * Added labels, tones, descriptions, risk copy, action reason label, and aria text for corroboration. **Files Changed**: * `src/extensions/trend-finder/view-model.ts` - Added corroboration view model and copy mappings. *** ### Task T009 - Implement reviewed-identity entity derivation **Started**: 2026-06-19 22:20 **Completed**: 2026-06-19 22:23 **Duration**: 3 minutes **Notes**: * Implemented source-local, competitor, signal syndication, and source fallback identity resolution without adding providers. **Files Changed**: * `scripts/lib/ai-runtime/corroboration.ts` - Added entity derivation priority path. *** ### Task T010 - Implement corroboration status fields **Started**: 2026-06-19 22:22 **Completed**: 2026-06-19 22:24 **Duration**: 2 minutes **Notes**: * Added status classification, role count, dominance ratio, caution, label, and bounded explanation fields. * BQC: Kept unavailable fallback when reviewed identity metadata is absent. **Files Changed**: * `scripts/lib/ai-runtime/corroboration.ts` - Added classification and bounded display output. *** ### Task T011 - Wire corroboration into source breakdowns **Started**: 2026-06-19 22:24 **Completed**: 2026-06-19 22:25 **Duration**: 1 minute **Notes**: * Attached corroboration before action recommendations and merged `originator-only` idempotently in schema order. **Files Changed**: * `scripts/lib/ai-runtime/source-breakdown.ts` - Added corroboration assignment and deterministic flag merge. *** ### Task T012 - Apply bounded score downrank **Started**: 2026-06-19 22:24 **Completed**: 2026-06-19 22:26 **Duration**: 2 minutes **Notes**: * Added `corroboration_gate` score adjustment and bounded originator-only score downrank/cap. **Files Changed**: * `scripts/lib/ai-runtime/scoring.ts` - Added corroboration score adjustment row. * `src/extensions/trend-finder/view-model.ts` - Added score adjustment ordering. *** ### Task T013 - Cap originator-only action priority **Started**: 2026-06-19 22:25 **Completed**: 2026-06-19 22:26 **Duration**: 1 minute **Notes**: * Added originator-only action score penalty, cap, warning, act-now block, and independent-confirmation next step. **Files Changed**: * `scripts/lib/ai-runtime/action-priority.ts` - Added originator-only action cap behavior. *** ### Task T014 - Render corroboration in derived source summaries **Started**: 2026-06-19 22:26 **Completed**: 2026-06-19 22:27 **Duration**: 1 minute **Notes**: * Rendered corroboration as a bounded summary card alongside consensus and builder signal. **Files Changed**: * `src/extensions/trend-finder/components/source-breakdown.tsx` - Added corroboration summary cell. *** ### Task T015 - Project corroboration into static Brief export **Started**: 2026-06-19 22:27 **Completed**: 2026-06-19 22:28 **Duration**: 1 minute **Notes**: * Projected only bounded labels, counts, tone, description, and aria text into static Brief topics. **Files Changed**: * `scripts/extensions/trend-finder/static-brief-export.ts` - Added static Brief corroboration projection. *** ### Task T016 - Render static Brief corroboration markup **Started**: 2026-06-19 22:28 **Completed**: 2026-06-19 22:28 **Duration**: 1 minute **Notes**: * Rendered projected corroboration through escaped static Brief markup. **Files Changed**: * `scripts/extensions/trend-finder/static-brief-renderer.ts` - Added corroboration callout and metric. *** ### Task T017 - Update payload reporting and docs **Started**: 2026-06-19 22:28 **Completed**: 2026-06-19 22:30 **Duration**: 2 minutes **Notes**: * Added payload pressure reporting for `data.topics[].corroboration`. * Documented corroboration statuses, score/action caps, and the distinction between source scarcity and independent-origin scarcity. **Files Changed**: * `scripts/extensions/trend-finder/measure-payload-size.ts` - Added corroboration branch reporting. * `docs/extensions/trend-finder-scoring.md` - Documented corroboration gate behavior. * `docs/extensions/trend-finder-ui-surfaces.md` - Documented live/static display boundaries. *** ### Task T018 - Add helper and source-breakdown tests **Started**: 2026-06-19 22:30 **Completed**: 2026-06-19 22:37 **Duration**: 7 minutes **Notes**: * Added helper coverage for unavailable, originator-only, weak, confirmed, competitor, and syndication cases. * Added source-breakdown integration coverage for corroboration assignment and deterministic risk flag propagation. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/corroboration.test.ts` - Added corroboration helper tests. * `scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts` - Added source-breakdown propagation test. *** ### Task T019 - Add scoring and action-priority tests **Started**: 2026-06-19 22:32 **Completed**: 2026-06-19 22:37 **Duration**: 5 minutes **Notes**: * Added scoring assertion for originator-only downrank and confirmed-topic neutral adjustment. * Added action assertion that originator-only topics cannot become `act_now`. **Files Changed**: * `scripts/lib/ai-runtime/__tests__/scoring.test.ts` - Added corroboration gate score test. * `scripts/lib/ai-runtime/__tests__/action-priority.test.ts` - Added originator-only action cap test. *** ### Task T020 - Add schema, view-model, and component tests **Started**: 2026-06-19 22:33 **Completed**: 2026-06-19 22:37 **Duration**: 4 minutes **Notes**: * Added schema coverage for corroboration parsing/fallback and `originator-only` risk flags. * Added view-model and source summary component coverage for labels, tone, and accessible text. **Files Changed**: * `src/lib/__tests__/trend-finder-schema.test.ts` - Added corroboration schema assertions. * `src/extensions/trend-finder/__tests__/view-model.test.ts` - Added corroboration and originator-only view-model assertions. * `src/extensions/trend-finder/components/__tests__/source-breakdown.test.tsx` - Added source summary component test. *** ### Task T021 - Add static Brief privacy tests **Started**: 2026-06-19 22:34 **Completed**: 2026-06-19 22:37 **Duration**: 3 minutes **Notes**: * Added static Brief export and renderer assertions for projected corroboration and identity-field exclusion. **Files Changed**: * `scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts` - Added projection privacy assertions. * `scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts` - Added renderer privacy assertions. **Focused Test Command**: * `bun run test scripts/lib/ai-runtime/__tests__/corroboration.test.ts scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts scripts/lib/ai-runtime/__tests__/scoring.test.ts scripts/lib/ai-runtime/__tests__/action-priority.test.ts src/lib/__tests__/trend-finder-schema.test.ts src/extensions/trend-finder/__tests__/view-model.test.ts src/extensions/trend-finder/components/__tests__/source-breakdown.test.tsx scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts` - 9 files passed, 242 tests passed. *** ### Task T022 - Run focused validation checks **Started**: 2026-06-19 22:37 **Completed**: 2026-06-19 22:40 **Duration**: 3 minutes **Notes**: * Focused Vitest suites passed after the type-fixture fixes. * App and script TypeScript checks passed. * Payload-size report on `src/data/live-data.example.json` stayed under the 1 MB extension boundary. * ASCII validation passed across changed and untracked files. **Files Changed**: * `.spec_system/specs/phase29-session04-corroboration-gate/tasks.md` - Marked implementation complete. * `.spec_system/specs/phase29-session04-corroboration-gate/implementation-notes.md` - Recorded final validation. **Validation Commands**: * `bun run test scripts/lib/ai-runtime/__tests__/corroboration.test.ts scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts scripts/lib/ai-runtime/__tests__/scoring.test.ts scripts/lib/ai-runtime/__tests__/action-priority.test.ts src/lib/__tests__/trend-finder-schema.test.ts src/extensions/trend-finder/__tests__/view-model.test.ts src/extensions/trend-finder/components/__tests__/source-breakdown.test.tsx scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts` - 9 files passed, 242 tests passed. * `bun run typecheck` - Passed. * `bun run typecheck:scripts` - Passed. * `bun run scripts/extensions/trend-finder/measure-payload-size.ts src/data/live-data.example.json --all --json` - Trend Finder browser data payload 14,138 bytes; boundary 1,048,576 bytes. * ASCII validation over changed and untracked files - 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