synthesis/PROGRESS.md

Synthesis — Development Progress

Last updated: 2026-02-12
Current phase: Phase 3 ✅ → Ready for Phase 4

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Completed

Phase 0: Project Setup ✅

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

Phase 1: Chemistry Engine ✅

• 1.1 Types and interfaces (src/chemistry/types.ts)
• 1.2 Element data — 20 real elements (src/data/elements.json)
• 1.3 Element registry with lookup by symbol/number (src/chemistry/elements.ts)
• 1.4 Reaction engine — O(1) lookup, condition checking, failure reasons (src/chemistry/engine.ts)
• 1.5 Reaction data — 34 real reactions (src/data/reactions.json)
• 1.6 Compound data — 25 compounds with game effects (src/data/compounds.json)
• 1.7 Unit tests — 35 passing (tests/chemistry.test.ts)

Phase 2: ECS Foundation ✅

• 2.1 World setup — bitECS world + time tracking (src/ecs/world.ts)
• 2.2 Core components — Position, Velocity, SpriteRef, Health, ChemicalComposition (src/ecs/components.ts)
• 2.3 Movement system — velocity-based + bounce (src/ecs/systems/movement.ts)
• 2.4 Phaser ↔ bitECS sync bridge — polling-based, creates/destroys/syncs sprites (src/ecs/bridge.ts)
• 2.5 Entity factory — createGameEntity/removeGameEntity (src/ecs/factory.ts)
• 2.6 Health/damage system — damage, healing, death detection (src/ecs/systems/health.ts)
• 2.7 Visual test — 20 colored circles bouncing at 60fps, GameScene (src/scenes/GameScene.ts)
• Unit tests — 39 passing (tests/ecs.test.ts)

Phase 3: World Generation ✅

• 3.1 Tilemap system — canvas tileset with per-pixel variation + Phaser tilemap (src/world/tilemap.ts)
• 3.2 Biome data — Catalytic Wastes: 8 tile types (src/data/biomes.json)
• 3.3 Noise generation — simplex-noise, seeded PRNG (mulberry32), deterministic (src/world/noise.ts)
• 3.4 World generator — elevation noise → base terrain, detail noise → overlays (src/world/generator.ts)
• 3.5 Resource placement — geysers on acid-shallow zones, mineral veins on ground (src/world/generator.ts)
• 3.6 Camera — WASD movement, mouse wheel zoom (0.5x–3x), bounds clamping (src/world/camera.ts)
• 3.7 Minimap — canvas-based 160x160 overview, viewport indicator, border (src/world/minimap.ts)
• Unit tests — 21 passing (tests/world.test.ts)

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In Progress

None — ready to begin Phase 4

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Up Next: Phase 4 — Player Systems

• 4.1 Player entity + WASD controller
• 4.2 Inventory (weight-based, element stacking)
• 4.3 Element collection from world objects
• 4.4 Crafting (chemistry engine integration)
• 4.5 Projectile system (throw elements/compounds)
• 4.6 Quick slots (1-2-3-4 hotkeys)
• 4.7 HUD (UIScene: health ring, inventory bar, element info)

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Blockers

None

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Session Log

#	Date	Phase	Summary
1	2026-02-12	Phase 0	Project setup: GDD, engine analysis, npm init, Phaser config, BootScene, cursor rules, plan
2	2026-02-12	Phase 1	Chemistry engine: 20 elements, 25 compounds, 34 reactions, engine with O(1) lookup + educational failures, 35 tests passing
3	2026-02-12	Phase 2	ECS foundation: world + time, 5 components, movement + bounce + health systems, Phaser bridge (polling sync), entity factory, GameScene with 20 bouncing circles at 60fps, 39 tests passing
4	2026-02-12	Phase 3	World generation: simplex noise (seeded), 80x80 tilemap with 8 tile types, Catalytic Wastes biome, camera WASD+zoom, minimap with viewport indicator, 21 tests passing (95 total)