usdz
Tiny, dependency-free USD/USDA/USDC/USDZ loader + Tydra scene access, with NumPy-friendly zero-copy arrays (CPython abi3 wheel).
BowerBot skill that searches and downloads from the user's Sketchfab account
One file for 3D printing, AR preview, and parametric source. Pack STLs into USDZ with embedded OpenSCAD/CadQuery sources; export back to 3MF for slicers.