
FreeCAD CAD tool for AI agents: parametric 3D modeling (primitives, PartDesign bodies, sketches, pad/pocket/revolve, patterns, fillet/chamfer, booleans) and STEP/STL/3MF/OBJ/IGES import-export — pure C# over a local RPC bridge to a running FreeCAD. Cross-platform Windows/Linux/macOS.