---

name: shader-review description: | 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.

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.