This is your router for anything touching the GPU on Apple platforms. It splits into three main paths: Metal migration (porting from OpenGL/DirectX with shader conversion tables and diagnostic workflows), display performance (fixing the stuck-at-60fps-on-ProMotion problem that catches everyone), and RealityKit for non-game 3D content in SwiftUI. The migration section is particularly thorough, with separate skills for strategy decisions, API reference tables, and diagnostics that can apparently cut black screen debugging from 30 minutes to 5. If you're converting GLSL shaders, setting up MTKView, or trying to get 120Hz working, this routes you to the specific guidance instead of general Metal docs.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-graphics