I 3D print a lot and got tired of modeling every small bracket and latch by hand, so I built CAD Studio. You type something like "a push-to-open drawer latch with a printed spring". CAD Studio runs the coding agent you already have (Claude Code or Codex) inside a project folder. The agent writes a parametric build123d script, runs it, looks at the drawings it generated and fixes its own mistakes. You get: a 3D model (3MF, STEP, STL) you can orbit, explode, measure and cut open ISO technical drawings, one sheet per part, as a PDF a print plate with every part laid flat on request, a motion simulation with collision checks Every dimension is a named constant, so you can change it with a slider without another AI call, and every generation is a version you can compare in 3D. The push-to-open drawer latch on the site came from one prompt in about 9 minutes: housing, lid, a plunger with a heart-shaped cam, a follower pin and a printed spring, with the push-to-latch cycle simulated. Demo video: https://filippofinke.github.io/cad-studio/ Source (MIT): https://github.com/filippofinke/cad-studio Limitations: macOS 15+, you need a Claude Code or Codex plan, complex mechanisms take 10–30 minutes, and the simulation is only as good as the model the agent writes. It's free and open source. I'd love feedback, especially on what kinds of parts you'd want to try.   submitted by   /u/filippofinke   to   r/SideProject [link]   [comments]