Bootstrap and toolchain guidance for three.js applications using npm, Vite/Webpack/Rollup, bare ESM import maps, and TypeScript. Covers canonical import paths for `three` core versus `three/addons/` (examples/jsm re-exports), version alignment with https://threejs.org/docs/, and fixing "module not found" for loaders and controls. Use when scaffolding a new 3D project, migrating bundler, or debugging resolution of addons—do not use for rendering API details (see threejs-renderers) or asset loading logic (see threejs-loaders).
