This is a comprehensive API reference for SpriteKit, Apple's 2D game framework, organized by category rather than alphabetically. It covers the complete node hierarchy, physics body creation methods, the action catalog, SKView configuration, particle emitters, and shader setup. You'd reach for this when you need to look up specific method signatures or browse what's available without jumping between Apple's documentation pages. It's part of the larger Axiom collection, which has picked up nearly 1,000 GitHub stars and 157 installs. Essentially a well-organized cheat sheet that keeps the entire SpriteKit API at your fingertips while you're coding.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-spritekit-ref