# Web Shader Extractor

> Extract a real WebGL / WebGPU / Canvas / shader effect from a live webpage (e.g. an animated gradient mesh, fluid/metaball, gaussian-splat scene, image distortion) and port it to a standalone, dependency-light JS project you can run locally or drop into an HTML artifact. Use when the user points at a site's visual effect and wants to reproduce/port/replay it, especially complex GPU effects our vanilla recipes don't cover.

- Skill: `nexu-io/web-shader-extractor` (Agent Skill)
- Install (CLI): `npx skillmds@latest add nexu-io/web-shader-extractor`
- Raw SKILL.md: https://api.skillmd.com/api/skills/nexu-io/web-shader-extractor/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: Nexu (https://skillmd.com/u/nexu-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/nexu-io/web-shader-extractor

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# web-shader-extractor (install-on-demand companion)

> This is a **thin wrapper**. The upstream skill has **no open license**, so motion-anything cannot
> redistribute its code — it is fetched on demand instead. Everything below is motion-anything's own
> description; the implementation lives upstream.

## What it does
Locks onto a page's rendering surface (WebGL/WebGPU/Canvas), records shader / resource / render-graph
/ timing / input evidence, builds an evidence-matched local baseline, then projectizes it into a
standalone runnable. This is the right tool for the "复杂网页效果 (WebGL / 高斯泼溅)" need that our
2D compositor deliberately does not draw — see `WEBGL.md`.

## How to invoke
1. If not already installed, fetch it (one-time, needs network):
   ```bash
   npx skills add https://github.com/lixiaolin94/skills --skill web-shader-extractor
   ```
2. Then follow that skill's flow against the target URL / effect.
3. Bring the extracted effect back as a background layer in an HTML artifact; motion-anything adds
   the surrounding tasteful motion.

## Note for maintainers
If lixiaolin94/skills adds a permissive license, vendor it here properly (like `skills/web-clone`)
so it ships offline with the product. Until then, keep this wrapper.
Upstream: https://github.com/lixiaolin94/skills