- Add 02-03-SUMMARY.md documenting AudioPlayer implementation - Update STATE.md: advance to plan 3 of 6, 60% progress - Update ROADMAP.md: phase 02 in progress (2/6 summaries) - Mark AUD-01 and AUD-02 requirements complete in REQUIREMENTS.md Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>