# STATE: Super Pong Next Gen

**Project Reference**
- **Core Value:** Pong reimagined with juice and depth — spectacular visuals, rich mechanics, complete game experience
- **Current Focus:** Roadmap created, ready for Phase 1 planning
- **Key Constraint:** Coarse granularity (5 phases max), HTML5 Canvas + vanilla JS, static deployment

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## Current Position

| Attribute | Value |
|-----------|-------|
| **Phase** | Planning complete, ready to plan Phase 1 |
| **Plan** | None active yet |
| **Status** | Roadmap finalized, 37/37 requirements mapped |
| **Progress** | 0% (0 phases complete) |

```
[                    ] 0% — Roadmap → Phase 1 planning
```

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## Performance Metrics

| Metric | Target | Status |
|--------|--------|--------|
| **Phase Coverage** | 100% (37/37 requirements mapped) | ✓ Complete |
| **Success Criteria** | 2-5 per phase | ✓ Complete |
| **Dependency Chain** | Linear (P1 → P2 → P3 → P4 → P5) | ✓ Validated |

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## Accumulated Context

### Key Decisions Made

1. **Coarse Granularity Compression:** Research suggested 10 phases; compressed to 5 by merging:
   - Game loop + input + physics = Phase 1
   - Second paddle + AI = Phase 2
   - Menus + audio + pause = Phase 3
   - Visual effects + power-ups + arenas = Phase 4
   - Performance + testing = Phase 5

2. **Phase 5 (Release) Has No Requirements:** All 37 v1 requirements covered by phases 1-4. Phase 5 is purely validation (cross-browser, performance, pitfall mitigation).

3. **Success Criteria Grounded in Research Pitfalls:** Each phase's criteria address critical pitfalls from research:
   - Phase 1: DPI scaling, game loop timing
   - Phase 2: Ball tunneling, input lag, AI balance
   - Phase 3: Audio autoplay policy
   - Phase 4: Power-up balance
   - Phase 5: Performance, memory leaks, cross-browser

### Coverage Validation

**Total v1 Requirements:** 37
- CORE (8): All mapped to Phase 1-2
- AI (4): All mapped to Phase 2
- SCRN (4): All mapped to Phase 3
- VFX (5): All mapped to Phase 1 (DPI) and Phase 4 (particles/glow/trails/shake)
- PWR (7): All mapped to Phase 4
- ARENA (4): All mapped to Phase 4
- AUD (5): All mapped to Phase 3

**Unmapped Requirements:** 0 ✓
**Coverage:** 100% ✓

### Research Alignment

- Phase 1 addresses Research Pitfalls: #1 (Game Loop Timing), #2 (Canvas DPI Scaling)
- Phase 2 addresses Research Pitfalls: #3 (Ball Tunneling), #4 (Input Lag), #5 (AI Difficulty Balance)
- Phase 3 addresses Research Pitfall: #6 (WebAudio Autoplay Policy)
- Phase 4 addresses Research Pitfalls: #7 (Power-Up Balance)
- Phase 5 addresses Research Pitfall: #8 (Memory Leaks)

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## Session Continuity

### What Just Happened

Roadmap derived from 37 v1 requirements organized into 5 phases, each with 2-5 observable success criteria. Granularity set to coarse; 10-phase research recommendation compressed by grouping related technical work.

### What Comes Next

1. `/gsd:plan-phase 1` — Decompose Phase 1 into executable plans
2. Continue through phases 2-5
3. Execute plans in dependency order
4. Validate success criteria at each phase completion

### Known Blockers

None. All context available, all requirements mapped, roadmap ready for planning.

### Decisions Pending

None. Roadmap finalized; awaiting user approval before phase planning begins.

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*State initialized: 2026-03-10*