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xenitV1xenitV1/Antigravity-Workflows/skills/game-development/web-games/SKILL.md

web-games

Skill130 starsChanged 10 months agoMITView on GitHub

Web browser game development principles. Framework selection, WebGPU, optimization, PWA.

We split this skill into the rules it gives an agent

6 rules. About 0 are common, 5 are distinctive, and 1 is very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈5

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 1

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    New projects: Use WebGPU with WebGL fallback

    line 57
  2. Distinctive:

    Legacy support: Start with WebGL

    line 58
  3. Very specific:

    Feature detection: Check navigator.gpu

    line 59
  4. Distinctive:

    Object pooling: - Avoid GC

    line 78
  5. Distinctive:

    Create AudioContext on first click/tap

    line 126
  6. Distinctive:

    Use Web Audio API

    line 131

≈ “Common” is an estimate: at least 1 in 5 of the 308,232 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Web Browser Game Development

Framework selection and browser-specific principles.


1. Framework Selection

Decision Tree

What type of game?
│
├── 2D Game
│   ├── Full game engine features? → Phaser
│   └── Raw rendering power? → PixiJS
│
├── 3D Game
│   ├── Full engine (physics, XR)? → Babylon.js
│   └── Rendering focused? → Three.js
│
└── Hybrid / Canvas
    └── Custom → Raw Canvas/WebGL

Comparison (2025)

FrameworkTypeBest For
Phaser 42DFull game features
PixiJS 82DRendering, UI
Three.js3DVisualizations, lightweight
Babylon.js 73DFull engine, XR

2. WebGPU Adoption

Browser Support (2025)

BrowserSupport
Chrome✅ Since v113
Edge✅ Since v113
Firefox✅ Since v131
Safari✅ Since 18.0
Total~73% global

Decision

  • New projects: Use WebGPU with WebGL fallback
  • Legacy support: Start with WebGL
  • Feature detection: Check navigator.gpu

3. Performance Principles

Browser Constraints

ConstraintStrategy
No local file accessAsset bundling, CDN
Tab throttlingPause when hidden
Mobile data limitsCompress assets
Audio autoplayRequire user interaction

Optimization Priority

  1. Asset compression - KTX2, Draco, WebP
  2. Lazy loading - Load on demand
  3. Object pooling - Avoid GC
  4. Draw call batching - Reduce state changes
  5. Web Workers - Offload heavy computation

4. Asset Strategy

Compression Formats

TypeFormat
TexturesKTX2 + Basis Universal
AudioWebM/Opus (fallback: MP3)
3D ModelsglTF + Draco/Meshopt

Loading Strategy

PhaseLoad
StartupCore assets, <2MB
GameplayStream on demand
BackgroundPrefetch next level

5. PWA for Games

Benefits

  • Offline play
  • Install to home screen
  • Full screen mode
  • Push notifications

Requirements

  • Service worker for caching
  • Web app manifest
  • HTTPS

6. Audio Handling

Browser Requirements

  • Audio context requires user interaction
  • Create AudioContext on first click/tap
  • Resume context if suspended

Best Practices

  • Use Web Audio API
  • Pool audio sources
  • Preload common sounds
  • Compress with WebM/Opus

7. Anti-Patterns

❌ Don't✅ Do
Load all assets upfrontProgressive loading
Ignore tab visibilityPause when hidden
Block on audio loadLazy load audio
Skip compressionCompress everything
Assume fast connectionHandle slow networks

Remember: Browser is the most accessible platform. Respect its constraints.

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