Exactly 2·π·3²·5. The agent can check its own arithmetic, and a mesh would never land on that number.
OpenCascade in a browser tab. Every modelling verb is a WebMCP tool.
Booleans, fillets and STEP export, driven by tool calls a human approves.
and every change went through a human.
A drop-in plugin for an unmodified CAD app, and a shell that merges tools across apps.