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# Implementation Summary

**Session ID**: `phase33-session04-harden-dream-projection` **Completed**: 2026-06-25 **Duration**: 1 hour

***

## Overview

Session 04 hardened the Cloudflare Pages public demo snapshot so Dream Review exports a small allowlisted branch when safe local Dream prescriptions are present. The exporter now preserves public presentation fields, drops private runtime and provider material, records Dream field-policy/count metadata, and falls back to `dream: null` for missing, empty, or unsafe input.

***

## Deliverables

### Files Created

| File                                                                                     | Purpose                  | Lines |
| ---------------------------------------------------------------------------------------- | ------------------------ | ----- |
| `.spec_system/specs/phase33-session04-harden-dream-projection/spec.md`                   | Session specification    | \~362 |
| `.spec_system/specs/phase33-session04-harden-dream-projection/tasks.md`                  | Task checklist           | \~74  |
| `.spec_system/specs/phase33-session04-harden-dream-projection/implementation-notes.md`   | Implementation evidence  | \~696 |
| `.spec_system/specs/phase33-session04-harden-dream-projection/code-review.md`            | Review and repair report | \~98  |
| `.spec_system/specs/phase33-session04-harden-dream-projection/security-compliance.md`    | Security and GDPR review | \~89  |
| `.spec_system/specs/phase33-session04-harden-dream-projection/validation.md`             | Validation report        | \~196 |
| `.spec_system/specs/phase33-session04-harden-dream-projection/IMPLEMENTATION_SUMMARY.md` | Closeout summary         | \~106 |

### Files Modified

| File                                                | Changes                                                                                                             |
| --------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- |
| `scripts/lib/pages-demo-snapshot.ts`                | Added Dream allowlist projection, privacy filtering, fallback handling, count summaries, and field-policy metadata. |
| `scripts/lib/__tests__/pages-demo-snapshot.test.ts` | Added positive, negative, fallback, metadata, and transform compatibility coverage for public Dream projection.     |
| `src/lib/__tests__/home-transforms.test.ts`         | Covered Dream transform compatibility with exported public projection data.                                         |
| `demo-website/public/demo/live-data.snapshot.json`  | Regenerated public fixture with 4 allowlisted Dream prescriptions.                                                  |
| `demo-website/public/demo/snapshot-metadata.json`   | Regenerated public metadata with Dream export and field-policy counts.                                              |
| `demo-website/snapshot-manifest.json`               | Regenerated snapshot manifest with Dream export and field-policy counts.                                            |
| `tsconfig.scripts.json`                             | Added script typecheck support for the app transform import used by exporter tests.                                 |
| `.spec_system/state.json`                           | Marked Session 04 complete and cleared the current session.                                                         |
| `.spec_system/PRD/phase_33/PRD_phase_33.md`         | Advanced Phase 33 progress to 4/6 sessions.                                                                         |
| `package.json`                                      | Bumped version from `0.5.26` to `0.5.27`.                                                                           |
| `README.md`                                         | Updated the displayed version to `0.5.27`.                                                                          |
| `docs/CHANGELOG.md`                                 | Added the Session 04 closeout entry.                                                                                |

***

## Technical Decisions

1. **Keep Dream projection inside the Pages snapshot exporter**: This preserves the existing static public-demo boundary and avoids hosted runtime reads.
2. **Use an explicit allowlist**: Only presentation fields needed by the demo and home dashboard transforms are exported.
3. **Fail closed for unsafe input**: Missing, empty, or fully unsafe Dream data returns `dream: null` instead of partially leaking private material.
4. **Verify through consumer transforms**: Focused tests call `deriveDreamData()` so the exported shape is proven compatible with the dashboard path.

***

## Test Results

| Metric   | Value                           |
| -------- | ------------------------------- |
| Tests    | 4287 full, 86 focused           |
| Passed   | 4287 full, 86 focused           |
| Coverage | Not collected by `bun run test` |

Additional quality gates passed: `bun run lint`, `bun run format:check`, `bun run typecheck`, `bun run typecheck:scripts`, `bun run demo:snapshot --dry-run --json`, `bun run demo:scan:pages --fixtures`, JSON parse, privacy scan, `git diff --check`, ASCII, and LF checks.

***

## Lessons Learned

1. `LiveData.dream` is intentionally loose, so the public exporter must own the safety boundary instead of relying on app validation.
2. Pulling app transforms into script tests requires script typecheck config to understand Vite asset module declarations.

***

## Future Considerations

Items for future sessions:

1. Session 05 should polish public-demo UI labels for frozen Dream and Trend Finder state.
2. Session 06 should run final build, route smoke, privacy, budget, and deploy gates before release.

***

## Session Statistics

* **Tasks**: 18 completed
* **Files Created**: 7
* **Files Modified**: 12
* **Tests Added**: Focused exporter and transform coverage
* **Blockers**: 0 resolved


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