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# Implementation Summary

**Session ID**: `phase04-session07-media-accessibility-privacy-and-performance-gates` **Package**: cross-cutting **Completed**: 2026-05-29 **Duration**: 0.6 hours

***

## Overview

Implemented the Phase 04 media release gate and supporting browser evidence checks. The session added a deterministic root `media:gates:check` command, catalog summary helpers, release-gate fixtures and tests, and the tracking updates needed to close out Session 07 cleanly.

The new gate reconciles approved and blocked media records with docs, accessibility, privacy, lazy-loading, budget, and browser evidence requirements while keeping `EXAMPLES/` quarantined and redacting sensitive output.

***

## Deliverables

### Files Created

| File                                                                                                               | Purpose                                                                            | Lines |
| ------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------- | ----- |
| `scripts/media-release-gates-config.mjs`                                                                           | Explicit release-gate config for statuses, docs, safe paths, budgets, and evidence | \~259 |
| `scripts/check-media-release-gates.mjs`                                                                            | Root media release gate CLI and validation helpers                                 | \~975 |
| `tests/mediaReleaseGates.test.ts`                                                                                  | Vitest coverage for release-gate fixtures, redaction, and failure cases            | \~438 |
| `.spec_system/specs/phase04-session07-media-accessibility-privacy-and-performance-gates/IMPLEMENTATION_SUMMARY.md` | Session closeout summary                                                           | \~90  |

### Files Modified

| File                                                                                             | Changes                                                                                |
| ------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- |
| `.spec_system/specs/phase04-session07-media-accessibility-privacy-and-performance-gates/spec.md` | Marked the session complete                                                            |
| `.spec_system/PRD/phase_04/PRD_phase_04.md`                                                      | Marked Session 07 complete and updated the phase tracker                               |
| `.spec_system/PRD/PRD.md`                                                                        | Marked Session 06 and Session 07 complete in the Phase 04 status map                   |
| `.spec_system/state.json`                                                                        | Marked Session 07 complete in workflow state                                           |
| `package.json`                                                                                   | Bumped the patch version                                                               |
| `apps/web/src/data/mediaCatalog.ts`                                                              | Tightened Session 07 gate notes and release-state coverage                             |
| `apps/web/src/lib/mediaCatalog.ts`                                                               | Added deterministic accessibility, privacy, metadata, blocker, and readiness summaries |
| `apps/web/tests/mediaCatalog.test.ts`                                                            | Updated catalog expectations for release readiness and blocker summaries               |
| `scripts/README_scripts.md`                                                                      | Documented the media release gate and its ordering                                     |
| `docs/media-assets.md`                                                                           | Documented Session 07 gate policy and release-blocker behavior                         |
| `docs/privacy-and-security.md`                                                                   | Added media privacy gate coverage notes                                                |
| `docs/release.md`                                                                                | Added `media:gates:check` to release readiness guidance                                |
| `public-demo/README_public-demo.md`                                                              | Updated demo media accessibility and offline notes                                     |
| `public-demo/docs_public-demo/validation.md`                                                     | Updated public-demo validation evidence requirements                                   |
| `tests/e2e/support/browserGuards.ts`                                                             | Added media-failure, reduced-motion, and privacy-safe browser helpers                  |
| `tests/e2e/app.e2e.ts`                                                                           | Expanded app media coverage for fallback and layout checks                             |
| `tests/e2e/public-demo.e2e.ts`                                                                   | Expanded public-demo media coverage for offline and failure checks                     |

***

## Technical Decisions

1. **Explicit gate config over discovery**: the root checker uses declared path prefixes, docs references, and issue codes so release rules stay reviewable and deterministic.
2. **Approved-versus-blocked split**: approved catalog records must meet release readiness criteria, while non-approved records must retain visible blockers and never appear release-ready.
3. **Redacted local output**: checker output and validation notes avoid raw prompts, provider payloads, absolute paths, and `EXAMPLES/` excerpts.

***

## Test Results

| Metric  | Value                 |
| ------- | --------------------- |
| Tests   | 1997 total test cases |
| Passed  | 1993                  |
| Skipped | 4                     |
| Failed  | 0                     |

***

## Lessons Learned

1. Release gates work best when catalog data, docs, browser evidence, and repository scripts share one explicit configuration surface.
2. Tracking documents need to move together with code so phase state does not drift from the implemented session.

***

## Future Considerations

Items for future sessions:

1. Complete Session 08 validation and documentation closeout.
2. Keep media gate docs and browser evidence aligned as catalog records change.

***

## Session Statistics

* **Tasks**: 20 completed
* **Files Created**: 4
* **Files Modified**: 17
* **Tests Added**: 1
* **Blockers**: 0 resolved


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