- Add GameConfig with initialBallSpeed (220px/s), speedIncrement (18px/s), paddleSpeed (400px/s)
- Add Physics.serveBall(): centers ball, sets random angle (-45 to +45 deg), random left/right dir
- Replace Physics.update() skeleton with full ball movement and wall bounce logic
- Add Physics._checkPaddleCollision() with 5-zone angle deflection and speed increment per hit
- Ball exits left/right bounds → immediate re-serve from center
- Ball pushed out of paddle on collision to prevent double-hit next frame
- Add on-canvas speed debug display (Phase 1 verification aid)
- Created 01-01-SUMMARY.md documenting objects built, decisions, patterns
- Updated STATE.md: position advanced to plan 2/2 in Phase 1
- Updated ROADMAP.md: Phase 1 plan 1/2 complete (in progress)
- Marked CORE-07 and VFX-05 requirements as complete in REQUIREMENTS.md
- Created index.html with valid HTML5 structure and black full-window canvas
- Renderer object with devicePixelRatio-aware resize() using logical vs bitmap coords
- CSS enforces overflow:hidden with no scrollbars
- Minimum 4:3 aspect ratio enforcement in resize logic
- window.addEventListener('resize') handler for live canvas rescaling
Synthesized 4 parallel research efforts into comprehensive SUMMARY.md:
- STACK.md: Vanilla Canvas 2D, fixed timestep, Web Audio, no dependencies
- FEATURES.md: MVP features + v1.x enhancements + defer list
- ARCHITECTURE.md: Game loop + state machine + entity patterns, 10-phase build order
- PITFALLS.md: 8 critical pitfalls with prevention strategies
Key recommendations:
- Use fixed timestep accumulator (60 Hz physics, variable rendering)
- Implement 10 phases from game loop foundation to cross-browser testing
- Address critical pitfalls early (tunneling, timing, DPI, autoplay, AI, power-ups, lag, memory)
- MVP ships with core Pong + AI + menus + basic polish
- v1.x adds particles, trails, power-ups, arenas
All research backed by official sources (MDN, web.dev, Chrome docs) and established patterns.
Confidence: HIGH. Ready for requirements definition.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
