Spline is a browser-based visual editor for building 3D web experiences without touching Three.js code. You get a collaborative design environment with state-based animations, event handling, and direct React component export. It's genuinely useful if you're a designer who wants to ship interactive 3D without learning WebGL, or a developer who needs to hand off 3D work to non-coders. The runtime lets you control objects programmatically from React, so you can keep visual design in Spline while handling logic in code. Trade-off is less control than code-first approaches, but that's the point. If you need maximum performance or custom shaders, stick with Three.js.
npx skills add https://github.com/freshtechbro/claudedesignskills --skill spline-interactive