# GenCAD independent STEP validation

- Baseline `refs --facts --planes --positioning`: PASS; assembly; 3831 faces; 10344 edges; 19 leaf occurrences; approximately 434 × 370.541 × 401.265 mm.
- Fabricated occurrence validation (`#o1.1` chassis, `#o1.2` screen carrier, `#o1.3`–`#o1.6` four feet): **PASS — all solids valid, closed, and positive volume**.
- Full assembly exhaustive validation completed: the 17 non-Livox occurrences pass; the two re-exported official Livox assemblies (`#o1.7`, `#o1.8`) are reported by GenCAD/OCP as `invalidTopology, openShell, selfIntersecting`. FreeCAD imports each source MID360 as seven solids and its source volume/hash are preserved. This is an imported vendor STEP/export interoperability warning, not a fabricated-part failure.
- GenCAD's Playwright-based still renderer was not installed or run because TH155 rules require browser operations through Kebab browser cockpit. Mandatory visual review was fulfilled with Kebab cockpit screenshots against the actual served STL viewer, plus GenCAD MCP cross-sections directly from FCStd.
- The exhaustive GenCAD self-intersection scan of the complete 3831-face vendor-inclusive STEP completed in Kebab terminal `05696b4df3`; its two vendor-model failures are reported above and are not hidden or counted as passed acceptance checks.
