> 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-session09-competitor-lens-and-creator-angle-pack/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase27-session09-competitor-lens-and-creator-angle-pack` **Started**: 2026-06-13 03:43 **Last Updated**: 2026-06-13 04:16

***

## Session Progress

| Metric              | Value     |
| ------------------- | --------- |
| Tasks Completed     | 24 / 24   |
| Estimated Remaining | 0 minutes |
| Blockers            | 0         |

***

## Task Log

### 2026-06-13 - Session Start

**Environment verified**:

* [x] Prerequisites confirmed
* [x] Tools available through project-local binaries
* [x] Directory structure ready

***

### Task T003 - Create implementation-notes scaffold for session progress tracking

**Started**: 2026-06-13 03:43 **Completed**: 2026-06-13 03:43 **Duration**: 1 minute

**Notes**:

* Created the required session progress log before implementation work.
* Recorded environment verification, including the resolved local PATH for `tsc` and `vitest`.

**Files Changed**:

* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/implementation-notes.md` - Added session progress scaffold.

**BQC Fixes**:

* N/A - setup tracking task.

***

### Task T001 - Verify Session 09 prerequisites and source compliance boundary

**Started**: 2026-06-13 03:41 **Completed**: 2026-06-13 03:43 **Duration**: 2 minutes

**Notes**:

* Verified Session 09 scope against `.spec_system/PRD/phase_27/session_09_competitor_lens_and_creator_angle_pack.md`.
* Confirmed Session 03 and Session 08 are completed in spec-system state.
* Confirmed YouTube compliance boundary remains public video metadata and public channel titles only; no transcripts, comments, media files, authorized account data, private channel data, or new source calls are in scope.
* Confirmed competitor matching is source-local string matching against already-normalized public channel-title entities.

**Files Changed**:

* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/tasks.md` - Marked T001 complete.
* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/implementation-notes.md` - Recorded prerequisite and compliance verification.

**BQC Fixes**:

* N/A - setup verification task.

***

### Task T002 - Confirm current focused test commands and changed-file test targets

**Started**: 2026-06-13 03:42 **Completed**: 2026-06-13 03:43 **Duration**: 1 minute

**Notes**:

* Confirmed package scripts expose `bun run typecheck:scripts`, `bun run typecheck`, and `bun run test`.
* Confirmed focused validation can use `bunx vitest run` against changed test files.
* Planned focused targets include competitor matching, saved lens config, lens bridge, analyst validation, collector fallback, static Brief export/rendering, view-model projection, and Trend Finder component tests.

**Files Changed**:

* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/tasks.md` - Marked T002 complete.
* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/implementation-notes.md` - Recorded focused validation targets.

**BQC Fixes**:

* N/A - setup verification task.

***

### Task T004 - Extend Trend Finder schema with competitors, evidence metadata, and angle fields

**Started**: 2026-06-13 03:44 **Completed**: 2026-06-13 03:53 **Duration**: 9 minutes

**Notes**:

* Added additive Creator Lens `competitors` defaults with shared cap constants.
* Added browser-safe evidence-level competitor match metadata defaults.
* Added `contrarianAngle`, `plainExplainer`, and `suggestedTitle` topic fields while keeping exported types legacy-tolerant.

**Files Changed**:

* `src/extensions/trend-finder/schema.ts` - Extended schema defaults and exported types.
* `src/extensions/trend-finder/creator-lens-competitors.ts` - Added shared competitor bounds and normalization helpers.

**BQC Fixes**:

* Contract alignment: Browser parsing now supplies defaults while TypeScript fixtures can still omit additive fields.

***

### Task T005 - Extend browser Creator Lens normalization, draft persistence, keying, and save payloads

**Started**: 2026-06-13 03:45 **Completed**: 2026-06-13 03:53 **Duration**: 8 minutes

**Notes**:

* Added shared competitor parsing for browser draft payloads.
* Included competitors in dirty-state keying and strict save payload normalization.
* Preserved legacy draft migration by defaulting missing competitors to an empty list.

**Files Changed**:

* `src/extensions/trend-finder/creator-lens-storage.ts` - Added competitor normalization, issue mapping, parsing, persistence, and keying support.
* `src/extensions/trend-finder/creator-lens-competitors.ts` - Shared cap and dedupe logic consumed by browser storage.

**BQC Fixes**:

* State freshness on re-entry: Existing draft reload/reset flow remains keyed by the generated lens and now includes competitors in the key.
* Contract alignment: Save payloads reuse the same normalization as persisted drafts.

***

### Task T006 - Extend saved Creator Lens config validation for bounded competitors

**Started**: 2026-06-13 03:45 **Completed**: 2026-06-13 03:53 **Duration**: 8 minutes

**Notes**:

* Added strict saved-config validation for competitor arrays.
* Rejected malformed names, duplicates, oversized lists, and unknown top-level or lens fields before writes.
* Preserved legacy saved configs by accepting missing competitors as an empty list.

**Files Changed**:

* `scripts/lib/ai-runtime/creator-lens-config.ts` - Added competitor diagnostics and unknown-field rejection.
* `src/extensions/trend-finder/creator-lens-competitors.ts` - Shared normalization used by script-side config validation.

**BQC Fixes**:

* Trust boundary enforcement: Script-side saved config rejects unknown and malformed payload fields before persistence.
* Error information boundaries: Diagnostics identify fields and generic reasons without echoing raw submitted values.

***

### Task T007 - Create competitor matching helper for public YouTube channel-title entities

**Started**: 2026-06-13 03:46 **Completed**: 2026-06-13 03:53 **Duration**: 7 minutes

**Notes**:

* Added deterministic matcher entries keyed by normalized competitor names.
* Limited matches to `youtube-ai-creator-videos` source-local channel entities.
* Returned browser-safe evidence metadata with no raw source payload or private path exposure.

**Files Changed**:

* `scripts/extensions/trend-finder/competitor-matching.ts` - Added competitor matcher, evidence mapper, and summary helper.
* `src/extensions/trend-finder/creator-lens-competitors.ts` - Shared key normalization used by matcher.

**BQC Fixes**:

* Trust boundary enforcement: Matching ignores non-YouTube and non-channel entities.
* Contract alignment: Helper returns the same shape declared by the browser evidence schema.

***

### Task T008 - Extend analyst prompt, schema hint, output schema, and validation for angle fields

**Started**: 2026-06-13 03:46 **Completed**: 2026-06-13 03:53 **Duration**: 7 minutes

**Notes**:

* Added saved competitors to analyst input and prompt context.
* Added competitor match metadata to analyst-ready evidence.
* Required `contrarianAngle`, `plainExplainer`, and `suggestedTitle` in validated AI output while preserving TypeScript compatibility for older fixtures.

**Files Changed**:

* `scripts/lib/ai-runtime/trend-analyst.ts` - Extended prompt, input schema, output schema hint, and output validation.

**BQC Fixes**:

* Contract alignment: Analyst output validation now requires the declared angle-pack fields.
* Error information boundaries: Existing invented URL/date/source/metric checks continue to apply to new text fields.

***

### Task T009 - Extend fallback topic composition for angle-pack text

**Started**: 2026-06-13 03:47 **Completed**: 2026-06-13 03:53 **Duration**: 6 minutes

**Notes**:

* Added deterministic fallback contrarian angle, plain explainer, and suggested title in scoring fallback.
* Updated the older frequency-based topic utility to emit the same angle fields when called directly.
* Used topic names, lens fields, and already-cited evidence titles only.

**Files Changed**:

* `scripts/lib/ai-runtime/scoring.ts` - Added angle-pack fallback builders and scoring pass-through.
* `scripts/extensions/trend-finder/topics.ts` - Added deterministic angle fields to frequency-based topics.

**BQC Fixes**:

* Failure path completeness: Missing or invalid AI angle output falls back to deterministic text.
* Contract alignment: Scored topics always carry the new fields after scoring.

***

### Task T010 - Wire competitor matching into Apify normalization and collector evidence projection

**Started**: 2026-06-13 03:53 **Completed**: 2026-06-13 03:59 **Duration**: 6 minutes

**Notes**:

* Added default competitor match metadata to Apify evidence pairs for both browser and analyst payloads.
* Kept public source-local channel metadata as the only matching input.
* Included competitor match metadata in enrichment cache fingerprints and cache hydration.

**Files Changed**:

* `scripts/extensions/trend-finder/sources/apify-normalizers.ts` - Added default competitor metadata on normalized evidence pairs.
* `scripts/extensions/trend-finder/collector.ts` - Added competitor match cache projection and hydration.

**BQC Fixes**:

* Contract alignment: Cached and fresh evidence now expose the same competitor match shape.
* Trust boundary enforcement: Matching remains downstream of normalized public source-local signals.

***

### Task T011 - Apply competitor matches and angle-pack fallback through collector scoring

**Started**: 2026-06-13 03:53 **Completed**: 2026-06-13 03:59 **Duration**: 6 minutes

**Notes**:

* Applied competitor match state to browser evidence and analyst evidence before scoring.
* Added competitor match summaries to source collection results and collection traces.
* Added a timeout-safe warning path if competitor matching fails without stopping collection.

**Files Changed**:

* `scripts/extensions/trend-finder/collector.ts` - Applied match state and surfaced summary/warning metadata.
* `scripts/lib/ai-runtime/scoring.ts` - Carries deterministic angle-pack fallback fields through scoring.

**BQC Fixes**:

* Failure path completeness: Collector continues with default non-match metadata if matching fails.
* Error information boundaries: Warning logs do not expose raw source payloads.

***

### Task T012 - Extend Creator Lens draft hook for competitor lists

**Started**: 2026-06-13 03:55 **Completed**: 2026-06-13 03:59 **Duration**: 4 minutes

**Notes**:

* Added competitor text projection and parsing to the draft hook.
* Reused strict save preparation and in-flight guard for duplicate save prevention.
* Kept draft reset/re-entry behavior keyed through the expanded Creator Lens key.

**Files Changed**:

* `src/extensions/trend-finder/hooks/use-creator-lens-draft.ts` - Added competitor draft controls and validation issue propagation.

**BQC Fixes**:

* State freshness on re-entry: Competitors are included in draft keying and reset flows.
* Input validation: Competitor parsing uses the shared bounded normalizer before save.

***

### Task T013 - Render accessible competitor-list controls in the Creator Lens panel

**Started**: 2026-06-13 03:55 **Completed**: 2026-06-13 03:59 **Duration**: 4 minutes

**Notes**:

* Added a bounded competitor textarea, count indicator, and saved competitor chips.
* Added validation feedback wiring with `aria-invalid`, help text, and focus management after failed saves.
* Preserved disabled states while saves are in flight.

**Files Changed**:

* `src/extensions/trend-finder/components/creator-lens-panel.tsx` - Added competitor editor UI and accessible issue feedback.

**BQC Fixes**:

* Accessibility: Failed validation moves focus to the issue region and associates the competitor field with help/error text.
* Input support: Keyboard and screen reader paths use native textarea/button controls.

***

### Task T014 - Project competitor chips and angle-pack copy through view models

**Started**: 2026-06-13 04:00 **Completed**: 2026-06-13 04:05 **Duration**: 5 minutes

**Notes**:

* Added bounded evidence competitor chip projection.
* Added topic angle-pack projection with sanitized title, creator, contrarian, plain explainer, copy text, and empty-state labels.
* Reused the shared view model from dashboard and static report projection.

**Files Changed**:

* `src/extensions/trend-finder/view-model.ts` - Added angle-pack and competitor-chip view models and helpers.

**BQC Fixes**:

* Contract alignment: Components consume sanitized view models rather than raw generated fields.
* State freshness on re-entry: Copy text is derived from the current topic view model.

***

### Task T015 - Render competitor evidence chips in evidence link rows

**Started**: 2026-06-13 04:01 **Completed**: 2026-06-13 04:05 **Duration**: 4 minutes

**Notes**:

* Rendered bounded competitor chips below evidence metrics.
* Added accessible labels from the view model and tone-mapped styling.

**Files Changed**:

* `src/extensions/trend-finder/components/evidence-links.tsx` - Added competitor chip rendering.

**BQC Fixes**:

* Accessibility: Competitor flags use explicit aria labels and native text semantics.

***

### Task T016 - Render competitor evidence flags in Workbench expanded evidence rows

**Started**: 2026-06-13 04:01 **Completed**: 2026-06-13 04:05 **Duration**: 4 minutes

**Notes**:

* Added competitor match projection to Signal Workbench evidence rows.
* Included competitor labels in workbench search text.
* Rendered competitor flags with deterministic evidence-row pills.

**Files Changed**:

* `src/extensions/trend-finder/signal-workbench-model.ts` - Added competitor match row fields and search projection.
* `src/extensions/trend-finder/components/signal-workbench-table.tsx` - Rendered competitor evidence pill.

**BQC Fixes**:

* Determinism: Expanded evidence rows use one source-local match label per row.
* Accessibility: Competitor pill can announce the exact match label.

***

### Task T017 - Render copy-ready angle block on trend cards

**Started**: 2026-06-13 04:02 **Completed**: 2026-06-13 04:05 **Duration**: 3 minutes

**Notes**:

* Replaced the single creator-angle paragraph with an angle-pack block.
* Added copy-to-clipboard support for copy text.
* Reset copy button state whenever the angle copy changes.

**Files Changed**:

* `src/extensions/trend-finder/components/trend-card.tsx` - Added angle-pack block and copy button.

**BQC Fixes**:

* State freshness on re-entry: Copy status resets on topic/angle changes.
* Input support: Copy control is a native button with disabled in-flight state.

***

### Task T018 - Render angle-pack copy on dashboard Brief cards

**Started**: 2026-06-13 04:03 **Completed**: 2026-06-13 04:05 **Duration**: 2 minutes

**Notes**:

* Added Brief angle-pack rendering to today's pick and opportunity cards.
* Added explicit empty-state text for legacy topics missing angle-pack fields.

**Files Changed**:

* `src/extensions/trend-finder/views/brief-view.tsx` - Added Brief angle-pack block.

**BQC Fixes**:

* Legacy payload parsing: Missing angle-pack data renders an explicit empty state rather than inferred copy.

***

### Task T019 - Project angle-pack fields and competitor-safe evidence chips into static Brief rows

**Started**: 2026-06-13 04:03 **Completed**: 2026-06-13 04:05 **Duration**: 2 minutes

**Notes**:

* Extended static report schemas with bounded angle-pack fields.
* Projected competitor chip labels into static evidence rows.
* Added defaults for legacy static report rows.

**Files Changed**:

* `scripts/extensions/trend-finder/static-brief-export.ts` - Added static schema and projection fields.

**BQC Fixes**:

* Sanitized output boundaries: Static rows use limited, escaped-safe strings from the view model.
* Legacy compatibility: Defaults preserve old report parsing.

***

### Task T020 - Render static Brief angle blocks and competitor chips

**Started**: 2026-06-13 04:04 **Completed**: 2026-06-13 04:05 **Duration**: 1 minute

**Notes**:

* Rendered static angle blocks for today's pick, movement groups, and top opportunity rows.
* Rendered competitor chips for static evidence rows.
* Generalized static copy buttons so URL copy and angle copy reset to the correct label.

**Files Changed**:

* `scripts/extensions/trend-finder/static-brief-renderer.ts` - Added escaped angle/competitor rendering.

**BQC Fixes**:

* HTML escaping: Angle fields and competitor labels pass through the existing escaping helpers.
* Copy safety: Static copy buttons use explicit copy labels and escaped attributes.

***

### Task T021 - Add focused tests for lens storage, saved config, bridge validation, and competitor matching

**Started**: 2026-06-13 04:06 **Completed**: 2026-06-13 04:14 **Duration**: 8 minutes

**Notes**:

* Added competitor matching tests for normalized matching, non-YouTube/non-channel rejection, apply state, and summary output.
* Extended saved Creator Lens config tests for competitor normalization, strict unknown-field rejection, and redacted diagnostics.
* Extended bridge validation tests to reject malformed competitor payloads without echoing raw values.
* Added browser draft parser coverage for duplicate and invalid competitor entries.

**Files Changed**:

* `scripts/extensions/trend-finder/__tests__/competitor-matching.test.ts` - Added matcher unit coverage.
* `scripts/lib/ai-runtime/__tests__/creator-lens-config.test.ts` - Added saved config competitor validation coverage.
* `scripts/lib/__tests__/trend-finder-lens-bridge.test.ts` - Added bridge competitor validation coverage.
* `src/lib/__tests__/trend-finder-dashboard.test.tsx` - Added browser draft parser coverage.

**BQC Fixes**:

* Error information boundaries: Tests assert invalid private-looking competitor inputs are not echoed.

***

### Task T022 - Add focused tests for analyst angle validation, collector fallback, static Brief projection, and legacy payload parsing

**Started**: 2026-06-13 04:08 **Completed**: 2026-06-13 04:14 **Duration**: 6 minutes

**Notes**:

* Updated analyst fixtures for required angle-pack fields.
* Added analyst validation failure coverage when angle fields are missing.
* Added collector assertions for competitor match propagation and deterministic angle fallback.
* Added static Brief projection assertions for angle packs and competitor chips.
* Added legacy payload parsing coverage for missing angle and competitor fields.

**Files Changed**:

* `scripts/lib/ai-runtime/__tests__/trend-analyst.test.ts` - Added angle-pack validation and competitor prompt coverage.
* `scripts/extensions/trend-finder/__tests__/collector.test.ts` - Added competitor propagation and fallback angle assertions.
* `scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts` - Added static projection assertions.
* `src/extensions/trend-finder/__tests__/view-model.test.ts` - Added legacy payload and projection coverage.

**BQC Fixes**:

* Contract alignment: Tests now require analyst angle fields and verify deterministic fallback fields.
* Legacy compatibility: Older payloads missing additive fields still parse with defaults.

***

### Task T023 - Add component and view-model tests for editor, chips, Workbench, TrendCard, and Brief blocks

**Started**: 2026-06-13 04:10 **Completed**: 2026-06-13 04:14 **Duration**: 4 minutes

**Notes**:

* Added Creator Lens competitor input save assertions.
* Added evidence chip and Workbench competitor flag assertions.
* Added TrendCard angle-pack and copy-button assertions.
* Added Brief angle block and empty-state assertions.
* Added static renderer HTML assertions for angle blocks, copy labels, and competitor chips.

**Files Changed**:

* `src/lib/__tests__/trend-finder-dashboard.test.tsx` - Extended editor, EvidenceLinks, TrendCard, and Brief coverage.
* `src/extensions/trend-finder/components/__tests__/signal-workbench-view.test.tsx` - Added Workbench competitor flag coverage.
* `scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts` - Added static HTML rendering coverage.

**BQC Fixes**:

* Accessibility: Component tests assert accessible competitor match labels are rendered.
* Empty states: Brief cards now have explicit empty-state coverage.

***

### Task T024 - Run focused validation, typechecks, ASCII check, and record results

**Started**: 2026-06-13 04:14 **Completed**: 2026-06-13 04:16 **Duration**: 2 minutes

**Validation Results**:

* `bun run typecheck:scripts` - Passed.
* `bun run typecheck` - Passed.
* `bunx vitest run scripts/extensions/trend-finder/__tests__/competitor-matching.test.ts scripts/lib/ai-runtime/__tests__/creator-lens-config.test.ts scripts/lib/__tests__/trend-finder-lens-bridge.test.ts scripts/lib/ai-runtime/__tests__/trend-analyst.test.ts scripts/extensions/trend-finder/__tests__/collector.test.ts scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts src/extensions/trend-finder/__tests__/view-model.test.ts src/extensions/trend-finder/components/__tests__/signal-workbench-view.test.tsx src/lib/__tests__/trend-finder-dashboard.test.tsx` - Passed, 10 files and 133 tests.
* `rg -nP "[^\x00-\x7F]" ...changed files...` - Passed with no matches.

**Files Changed**:

* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/tasks.md` - Marked all tasks complete.
* `.spec_system/specs/phase27-session09-competitor-lens-and-creator-angle-pack/implementation-notes.md` - Recorded final validation.

**BQC Fixes**:

* Final validation complete; session is ready for the validate workflow step.

***


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