When to use this skill

ALWAYS use this skill when the user mentions:

Vector/matrix math order, applyQuaternion, lookAt, world vs local transforms
Bounding volumes Box3/Sphere, containment/intersection tests
Ray vs Plane vs Frustum tests (without full picking pipeline)

IMPORTANT: math vs objects vs animation

Need	Skill
Raw math types	threejs-math
`Raycaster` + layers picking	threejs-objects
QuaternionKeyframeTrack playback	threejs-animation

Trigger phrases include:

Installs

Repository

GitHub Stars

First Seen

Jun 6, 2026

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