metal

name	metal
description	Metal and Apple GPU engineering: shaders, compute kernels, ray tracing, tile-based deferred rendering architecture, Metal Performance Shaders, BRDF/sampling math, and GPU profiling with Instruments. Use when writing or reviewing Metal shader code, optimizing GPU workloads, or debugging rendering on Apple platforms. For cross-platform graphics theory and non-Metal shading languages (GLSL, HLSL, WGSL, WebGPU) use the graphics skill.
allowed-tools	["Read","Glob","Grep"]

Metal / GPU

Apple GPU engineering with Metal. Load references/_guide.md first.

References

Load: references/_guide.md

Topic	Reference
GPU analysis methodology	references/guidelines.md
Advanced Metal patterns	references/metal-patterns.md
BRDF models, sampling	references/rendering-math.md
GPU profiling methodology	references/profiling-guide.md

Workflow

1. Read references/guidelines.md before writing or reviewing shader code.
2. Produce the analysis block it specifies (units, coordinate systems, complexity, bandwidth) before code.
3. Validate physical plausibility of lighting math (energy conservation, reciprocity) against references/rendering-math.md.
4. Recommend profiling (Metal System Trace, GPU counters) before optimizing.

Related Skills

Need	Skill
Cross-platform graphics theory, GLSL/HLSL/WGSL	graphics
Swift-side integration, concurrency	swift
SwiftUI interop (drawables, CADisplayLink)	swiftui