Draw on the model where you want a change and say what you want. Your AI agent rewrites the CAD, then checks fit, printability and strength before anything reaches the printer.
Draw on the 3D model or a section sketch and say what should change. The agent learns the exact side, angle and face you meant.
Claude Code, Cursor or any MCP client edits the part as real parametric CAD (build123d / OpenCascade) in your private workspace. You watch it update live.
Every change is checked for collisions, bed fit and overhangs, and can be stress-tested. Download STL or STEP when it's right.
Sign in with a passkey, copy one message to your agent, approve it with your passkey. It reads the brief and gets to work.