# Synthesis — Development Progress

> **Last updated:** 2026-02-12  
> **Current phase:** Phase 0 ✅ → Ready for Phase 1

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## Completed

### Phase 0: Project Setup ✅
- [x] Game Design Document (`synthesis-gdd.md`)
- [x] Engine analysis and tech stack selection (`engine-analysis.md`)
- [x] npm project + dependencies (Phaser 3, bitECS, TypeScript, Vite, Vitest)
- [x] TypeScript strict config
- [x] Vite config (HMR, chunk splitting)
- [x] Phaser config (1280x720, pixel-art, arcade physics, top-down)
- [x] BootScene with title screen
- [x] Cursor rules (6 rules: project context, agent workflow, ECS, chemistry, Phaser, data)
- [x] Implementation plan (`IMPLEMENTATION-PLAN.md`)
- [x] Progress tracking (this file)

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## In Progress

_None — ready to begin Phase 1_

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## Up Next: Phase 1 — Chemistry Engine

- [ ] 1.1 Types and interfaces (`Element`, `Reaction`, `Compound`)
- [ ] 1.2 Element data — 20 real elements (JSON)
- [ ] 1.3 Element registry with lookup
- [ ] 1.4 Reaction engine core
- [ ] 1.5 Reaction data — 50 real reactions (JSON)
- [ ] 1.6 Compound properties
- [ ] 1.7 Unit tests (vitest)

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## Blockers

None

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## Session Log

| # | Date | Phase | Summary |
|---|------|-------|---------|
| 1 | 2026-02-12 | Phase 0 | Project setup complete: GDD, engine analysis, npm init, Phaser config, BootScene, cursor rules, implementation plan |