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shader-gen

AI shader generator for WebGL video effects, transitions, masks, and color grading (LUT / 调色 / 电影感 / film look). Use when the user wants a video effect (滤镜 / 特效), a transition (转场 / crossfade / wipe / cube / 3d), a mask (蒙版 / 遮罩 / reveal), a zoom / push-in (推近 / 推镜头), or a color grade — try the built-in effects (zoom, builtin LUTs) before generating a new shader.

codex/skills/shader-gen/SKILL.md

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# Shader Generator

If `submit_shader` or `inspect_item` are not loaded yet, load them with `ToolSearch` before calling them, so you use their real parameters instead of guessing.

Submit-only: creates a backend generation job, returns `jobId`. Use the `track_progress` tool for job lifecycle after submission.

**Always use `generate.ts` for new shaders.** Manual authoring is only for editing existing asset code — never as a fallback when generation fails.

## Catalog-first rule — try existing assets before generation

Before generating a shader, call `browse_library` unless the user names an exact asset id that is already visible in `browse_assets`.

`browse_library` is the source of truth for built-in effects, built-in transitions, and project effect/transition assets. Built-ins are stable global asset ids, not per-project DB assets, so they may not appear in `browse_assets`.