- Mark all 12 tasks as done in TASKS.md
- Update MISSION-MANIFEST.md: status → completed, all success criteria verified
- Update PRD.md: FR-017/018/019 marked COMPLETE, acceptance criteria 41-51 done
- Add MS19 completed work section to PRD
- Scratchpad: S2-S4 session logs with full PR/commit history
- All 5 issues (#508-512) closed
- 8 PRs merged (#515-522), 328 MS19-specific tests
- CI pipeline #635 green, web deployed to mosaic.woltje.com
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
