Cad Studio — AI skill for Claude Code

Describe a part, get a printable model. A native macOS CAD studio powered by the coding agent on your Mac (Claude Code or Codex) and build123d.

Type "a print-in-place planetary gearbox with four colors, animated with real gear ratios" and CAD Studio has your coding agent write a parametric `model.py`, run it with build123d and hand you a 3D model, an ISO technical drawing and files ready for your slicer. Every change is a new version you can go back to.

Website · ▶︎ Watch the narrated demo (MP4, with sound)

Features

• Chat with an agent that writes and fixes parametric build123d scripts for you
• Live 3D viewer with orbit, zoom, pan, grid, wireframe and multi-color 3MF parts
• Measure distances and cut sections through the model
• Animate mechanisms with a physics simulation (masses, springs, friction) and per-frame collision checks
• Multi-part models: assembled, exploded or print-plate view, show, hide or keep parts together
• Print plate with every part oriented and laid out for printing (plate.3mf, opened in your slicer)
• Floating parameter panel with sliders: tweak dimensions without calling the agent
• ISO technical drawings (first-angle projection): assembly with parts list plus one sheet per part, as a multi-page PDF
• Version history: jump back to any generation, chat and context included, and compare versions in 3D
• Attach or paste (⌘V) reference images, sketches, PDFs and STEP/STL files to the chat
• Export STEP, 3MF, STL, PDF drawing and model.py as one ZIP
• Printer-aware design rules for FDM, multi-ma