shader-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.