# Shader Review

> Reviews Godot Shader/Material implementation for known pitfalls. Triggers AFTER implementation, when code involves ShaderMaterial, set_shader_parameter, .gdshader, VisualShader, hint_screen_texture, BackBufferCopy, instance uniform, or uniform declarations. Do NOT use this skill for planning or teaching — only for post-implementation review.

- Skill: `valkor-ai/shader-review` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add valkor-ai/shader-review`
- Raw SKILL.md: https://api.skillmd.com/api/skills/valkor-ai/shader-review/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: valkor-ai (https://skillmd.com/u/valkor-ai)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/valkor-ai/shader-review

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# Shader Review

Post-implementation reviewer for Godot shader code. Checks against known gotchas that LLMs consistently get wrong.

## When to trigger

After shader-related code is written or modified. Look for:
- ShaderMaterial, `.gdshader` files, VisualShader resources
- `set_shader_parameter()` / `SetShaderParameter()` calls
- `hint_screen_texture`, BackBufferCopy nodes
- `instance uniform` declarations
- Uniform type assignments in scripts

## Review process

1. Read `gotchas.md`
2. Scan the implemented code against each gotcha
3. For each hit:
   - Cite the gotcha ID (e.g. G1)
   - Show the offending code
   - Provide the fix
4. If no hits, report clean
5. Optionally run `checklist.md` static checks for automated verification

When you need specific API details, delegate to the **godot-api** skill.