Polyfork low-poly 3D assets

Read https://polyfork.dev/prompt.txt at the start of a session: it is this catalogue as working instructions (picking assets that go together, assembling a kit on its grid, animating what is riggable) and it is kept current, unlike anything pasted into a project. Fetch it first if you are assembling a scene rather than looking up one asset. Polyfork is a library of low-poly 3D assets for three.js, glTF and game engines, described well enough to place without guessing. Sizes are real metres and the origin sits on the ground, so never rescale an asset to fake a fit: pick a right-sized one instead. A kit publishes the contract its parts agree on (the grid they snap to and the knobs whose value must match across a scene), so read get_kit before placing anything from one. Assets carry has_rig (animatable parts), remixable (createAsset knobs) and has_night (lights up after dark). Prefer preview_scene over pasting three.js the user cannot run, and find_matching over guessing what goes togethe