> 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-session02-attention-pattern-and-polarity-grid/implementation_summary.md).

# Implementation Summary

**Session ID**: `phase29-session02-attention-pattern-and-polarity-grid` **Completed**: 2026-06-19 **Duration**: 0.5 hours

***

## Overview

Completed Phase 29 Session 02 by adding Trend Finder's deterministic `attentionPattern` axis and a compact polarity/attention grid for live Trends and static Brief surfaces. Runtime derivation now labels ranked topics as adoption, creator-hype, announcement, discourse, or unavailable from existing role-share and title inputs. Schema defaults keep legacy payloads safe, browser and static projections expose bounded labels only, and the reception column is explicitly reserved for Session 03 rather than implying sentiment analysis exists now.

***

## Deliverables

### Files Created

| File                                                                                                 | Purpose                                                                                | Lines |
| ---------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | ----- |
| `.spec_system/specs/phase29-session02-attention-pattern-and-polarity-grid/spec.md`                   | Session specification and scope.                                                       | 255   |
| `.spec_system/specs/phase29-session02-attention-pattern-and-polarity-grid/tasks.md`                  | Completed task checklist.                                                              | 99    |
| `.spec_system/specs/phase29-session02-attention-pattern-and-polarity-grid/implementation-notes.md`   | Task-by-task implementation notes.                                                     | 633   |
| `.spec_system/specs/phase29-session02-attention-pattern-and-polarity-grid/security-compliance.md`    | Security and GDPR review for the session.                                              | 85    |
| `.spec_system/specs/phase29-session02-attention-pattern-and-polarity-grid/validation.md`             | Validation report and command evidence.                                                | 248   |
| `.spec_system/specs/phase29-session02-attention-pattern-and-polarity-grid/IMPLEMENTATION_SUMMARY.md` | Completion summary for updateprd.                                                      | 120   |
| `src/extensions/trend-finder/components/polarity-attention-grid.tsx`                                 | Reusable compact grid for movement, action, attention, and reserved reception columns. | 112   |
| `src/extensions/trend-finder/components/__tests__/polarity-attention-grid.test.tsx`                  | Component accessibility, empty-state, bounded-row, and long-label coverage.            | 85    |

### Files Modified

| File                                                                      | Changes                                                                                 |
| ------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- |
| `scripts/lib/ai-runtime/source-breakdown.ts`                              | Added deterministic attention-pattern derivation from role shares and title heuristics. |
| `scripts/lib/ai-runtime/__tests__/source-breakdown.test.ts`               | Covered every attention state, fallback behavior, and precedence.                       |
| `scripts/lib/ai-runtime/topic-quality.ts`                                 | Exported reviewed Session 01 title markers for reuse in attention derivation.           |
| `src/extensions/trend-finder/schema.ts`                                   | Added enum, type, default, and legacy-safe topic parsing for `attentionPattern`.        |
| `src/extensions/trend-finder/fixtures.ts`                                 | Added representative fixture attention states.                                          |
| `src/extensions/trend-finder/view-model.ts`                               | Added attention labels, tones, grid row projection, and run-level grid summaries.       |
| `src/extensions/trend-finder/__tests__/view-model.test.ts`                | Covered legacy defaults, labels, ordering, and reserved reception projection.           |
| `src/extensions/trend-finder/views/trends-view.tsx`                       | Rendered the grid in the Trends header.                                                 |
| `scripts/extensions/trend-finder/static-brief-export.ts`                  | Added sanitized static Brief grid projection and schema fields.                         |
| `scripts/extensions/trend-finder/static-brief-renderer.ts`                | Rendered escaped static Brief grid HTML.                                                |
| `scripts/extensions/trend-finder/static-brief-qa.ts`                      | Required the static Brief polarity/attention section and non-empty rows.                |
| `scripts/extensions/trend-finder/__tests__/static-brief-export.test.ts`   | Added static report grid and privacy-scan coverage.                                     |
| `scripts/extensions/trend-finder/__tests__/static-brief-renderer.test.ts` | Added static HTML escaping, landmark, row-limit, and empty-grid tests.                  |
| `scripts/extensions/trend-finder/__tests__/static-brief-qa.test.ts`       | Updated required section coverage for the new grid.                                     |
| `scripts/extensions/trend-finder/measure-payload-size.ts`                 | Included attention pattern in payload pressure reporting.                               |
| `scripts/extensions/trend-finder/mcp/server.ts`                           | Removed stale unused type aliases found by validation lint.                             |
| `docs/extensions/trend-finder-scoring.md`                                 | Documented attention states, derivation limits, and action-verdict separation.          |
| `docs/extensions/trend-finder-ui-surfaces.md`                             | Documented live and static grid behavior with reserved reception.                       |
| `tests/e2e/trend-finder.spec.ts`                                          | Added live Trends grid and mobile overflow guard coverage.                              |
| `tests/e2e/trend-finder-static-brief.spec.ts`                             | Added exported static Brief grid coverage.                                              |
| `tests/e2e/trend-finder-release-hardening.spec.ts`                        | Updated scheduler warning summary expectation found during validation.                  |
| `.spec_system/state.json`                                                 | Marked the session complete and reset the active session.                               |
| `.spec_system/PRD/phase_29/PRD_phase_29.md`                               | Updated progress to 2/18 sessions complete.                                             |
| `package.json`                                                            | Bumped version from `0.1.346` to `0.1.347`.                                             |
| `README.md`                                                               | Synced visible version line to `0.1.347`.                                               |
| `docs/CHANGELOG.md`                                                       | Added Phase 29 Session 02 release notes.                                                |

***

## Technical Decisions

1. **Keep attention separate from action**: `attentionPattern` labels the observed shape of attention and does not alter `actionRecommendation` or scoring priority.
2. **Derive from existing safe inputs**: The implementation reuses role shares and reviewed title heuristics, avoiding new source collection, comment bodies, prompts, provider responses, or private paths.
3. **Reserve reception explicitly**: The grid shows a Session 03 placeholder for reception so users do not mistake this session for aggregate sentiment work.

***

## Test Results

| Metric   | Value         |
| -------- | ------------- |
| Tests    | 3811          |
| Passed   | 3811          |
| Coverage | Not collected |

***

## Lessons Learned

1. Static Brief QA needed its required-section count updated when the new grid became a first-class report section.
2. Reusing the Session 01 title markers kept creator-hype detection narrow and avoided making generic excitement a catch-all label.

***

## Future Considerations

Items for future sessions:

1. Session 03 should fill the reserved reception column with aggregate-only reception states and preserve the no-comment-body boundary.
2. Later closeout gates should require every new derived field to publish an explicit unavailable/default state before static Brief export.

***

## Session Statistics

* **Tasks**: 25 completed
* **Files Created**: 8
* **Files Modified**: 26
* **Tests Added**: 8 suites or guards
* **Blockers**: 0 resolved


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