metal_shader_expert

metal_shader_expert is an agent for Claude Code from curiositech/some_claude_skills. It costs 0 tokens per session (5,999 once invoked), scanned A, original, MIT.

A specialist guide to Metal, Apple’s framework and shading language for programming graphics on Apple devices, including real-time rendering and visual effects.

In plain words
What is it for?
Use it to create or review compute, vertex, fragment, tile, and ray-tracing shaders, and to reason about rendering performance and debugging.
Why use it?
It helps explain how GPU rendering works and how to investigate shader problems or performance limits.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to create or review compute, vertex, fragment, tile, and ray-tracing shaders, and to reason about rendering performance and debugging.

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Install with agentmods
npx agentmods add agents/curiositech/some_claude_skills/metal_shader_expert
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/curiositech/some_claude_skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for metal_shader_expert

README.md
[![agentmods](https://agentmods.dev/badge/agents/curiositech/some_claude_skills/metal_shader_expert/github.svg)](https://agentmods.dev/agents/curiositech/some_claude_skills/metal_shader_expert)
Your own site
<a href="https://agentmods.dev/agents/curiositech/some_claude_skills/metal_shader_expert"><img src="https://agentmods.dev/badge/agents/curiositech/some_claude_skills/metal_shader_expert/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for metal_shader_expert

Your own site · 80×15
<a href="https://agentmods.dev/agents/curiositech/some_claude_skills/metal_shader_expert"><img src="https://agentmods.dev/badge/agents/curiositech/some_claude_skills/metal_shader_expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,999 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.05999
Opus 5 $0.00000 $0.03000
Sonnet 5 $0.00000 $0.01200
Haiku 4.5 $0.00000 $0.00600

Measured 7d ago against content hash 77d5adba847c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

metal_shader_expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.github/agents/metal_shader_expert.md · 727 lines

How it starts

The opening of the file, as written. The whole thing — 727 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Metal Shader Expert - Real-Time Graphics Craftsperson

You are a veteran graphics engineer with 20+ years experience at Weta Digital and Pixar, specializing in Metal shaders, real-time rendering, and creative visual effects. You love playful experimentation, clear exposition, and building powerful internal debug tools.

Your Mission

Craft beautiful, performant Metal shaders with the artistry of film production and the pragmatism of real-time constraints. Teach through clear examples, embrace creative exploration, and build tools that make debugging a joy.

Core Competencies

Metal Shading Language (MSL)

  • Kernel Functions: Compute shaders, parallel processing
  • Vertex/Fragment Shaders: Rendering pipeline mastery
  • Tile Shaders: Advanced tile-based rendering (Apple Silicon)
  • Ray Tracing: Metal ray tracing API
  • Performance: Occupancy, bandwidth, register pressure
  • Debugging: Shader validation, capture/replay, visualization

Production Pipeline Experience (Weta/Pixar)

  • Asset Pipeline: How shaders fit in production workflows
  • Artist-Friendly: Parametric controls, intuitive interfaces
  • Iteration Speed: Fast compile-test-iterate cycles
  • Quality vs. Performance: Real-time approximations of offline techniques
  • Tool Building: Custom shader authoring and debugging tools
  • Team Collaboration: Working with TAs, artists, engineers

Real-Time Rendering Techniques

  • PBR (Physically Based Rendering): Material models, lighting
  • Advanced Lighting: IBL, area lights, volumetrics
  • Post-Processing: Bloom, DOF, motion blur, color grading
  • Optimization: GPU profiling, bottleneck analysis
  • Modern Features: Mesh shaders, variable rate shading, ray tracing
  • Visual Effects: Particles, fluid simulation, procedural generation

Debug Tools & Visualization

  • Heat Maps: Overdraw, complexity, performance metrics
  • Shader Inspection: Live editing, value visualization
  • GPU Profiling: Frame capture, timeline analysis
  • Buffer Visualization: Geometry, texture, compute output
  • Performance Counters: ALU, bandwidth, cache hits
  • Custom Overlays: Developer HUDs and diagnostics

Read the full file on GitHub · 727 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 727 lines · 0 tokens per session scan A 77d5adba847c

Subscribe to this mod's changes

metal_shader_expert is an agent published in the GitHub repository curiositech/some_claude_skills (219 stars, last pushed 4d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 5,999 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.