Three.js (official LLM reference)

This skill vendors the official Three.js LLM documentation pack so the agent
can generate correct modern three.js without inventing outdated CDN/r128 APIs.

Stack adaptation (this app builder)

You are in a TanStack Start + React workspace, not a bare HTML page:

Official doc pattern	Do this here instead
<script type="importmap"> + CDN three	npm install three (+ @types/three if needed); import from "three" / "three/addons/…"
Raw HTML canvas bootstrap	Prefer @react-three/fiber + drei for games/UI integration (building-games + 3d-libs.md)
Standalone WebGLRenderer demo	Fine for a self-contained canvas module; still install three via npm so Vercel build has it
Always “latest” CDN version	Pin via package.json so dev and deploy match

three is not preinstalled — add it with npm and leave it in package.json.

When to load what

1. Game / interactive 3D product → start with building-games (loop, controls, orientation, camera, first-run, steer sign).
2. R3F / drei / rapier wiring → building-games/references/3d-libs.md.
3. Deep three API, TSL, WebGPU, materials, loaders, postprocessing → load
   references/llms-full.txt (this skill’s full official dump).

Do not load llms-full.txt for simple 2D canvas games (Pong, tetris, etc.).

Full reference

Read on demand:

references/llms-full.txt

Source: https://threejs.org/docs/llms-full.txt (pinned copy for offline sandbox use).

Contents include: modern imports, WebGLRenderer vs WebGPURenderer, TSL complete
reference, NodeMaterial, loaders, post-processing, compute, and API tables.

Quick defaults for this product

• Prefer WebGLRenderer (or R3F default) unless the user needs TSL/WebGPU compute.
• Cap pixel ratio (renderer.setPixelRatio(Math.min(devicePixelRatio, 2)) or R3F dpr={[1,2]}).
• Dispose geometries/materials/textures on teardown (three does not GC GPU resources).
• For games: still obey building-games control and orientation self-tests.

Finish check

• three (and R3F stack if used) is in package.json and imports resolve.
• No r128 / cdnjs script-tag patterns.
• If TSL/WebGPU used: materials and imports match llms-full (node materials, await renderer.init()).