A comprehensive API reference for RealityKit that's organized by category rather than dumping you into Apple's standard docs layout. You get entity APIs, component types, anchor options, materials, physics parameters, and animation details all broken down in a way that makes sense when you're actually building something. It's useful when you know roughly what you need but can't remember the exact signature or want to see what's available in a particular domain. With nearly 1,000 GitHub stars on the parent axiom repo, it's clearly solving a real problem: Apple's documentation is thorough but not always easy to navigate when you're in the middle of coding an AR experience.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-realitykit-ref