A comprehensive reference for building 2D and 3D games on Apple platforms, covering SpriteKit, SceneKit, and RealityKit. The real value is in the diagnostics: it has a 5-step physics bitmask checklist that catches phantom collision bugs in 2 minutes instead of 2 hours, and an automated auditor that scans for anti-patterns like SKShapeNode overuse, action memory leaks, and tunneling issues. Routes SceneKit questions to axiom-graphics since it's soft-deprecated as of iOS 26. The anti-rationalization table is honest about common mistakes, like the default 0xFFFFFFFF physics bitmask that causes collisions with everything. If you're building any kind of game or interactive simulation in Swift, this catches the gotchas before you waste time on them.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-games