cad-agent (kerryshi)

cad-agent is a text-to-CAD agent that turns an English request into a verified, 3D-printable part, and cannot grade its own homework. The pipeline runs English to a frozen spec (pydantic), then agent-written CadQuery code in a sandboxed subprocess, then deterministic verification against the spec, then a headless slice check with OrcaSlicer. The codegen agent never writes its own checks: verifiers derive every assertion from the frozen spec, using spec-anchored probe points, bounding boxes, boolean interference and mesh watertightness, and each gate ships with refuse-first evidence.

Part families are parametric enclosures (an open-top body with an inset screw-down lid on corner posts) and flat drone-frame plates (X-quad, with wheelbase, flight-controller and motor mount patterns, and prop-collision validation). Status is parked as of 2026-07-31 after an end-to-end proof: a drone-frame plate went from an English request through spec extraction, generated CadQuery, spec-derived verification and an OrcaSlicer slice check to a physical print on a Bambu P2S. An 80-test pytest suite ships with the repo.