create-cadlisted

# Create CAD ## Catalog - Display name: Create CAD - Category: Space and diagrams - Status: Ready - Route label: STEP-first parametric CAD workflow - Tone: slate - Short description: Create and validate one parametric CAD part, returning STEP as the primary artifact rather than a render-only image. ## What this skill does - Builds dimension-driven part geometry and exports a real STEP model with reproducible source. - Inspects bounding box, volume, topology and named features; preview imagery is secondary evidence. ## How to use Provide units, dimensions, functional features, tolerances, references and required exports. #### Example ```text Create a STEP-first L bracket: 80×50×5 mm, two 6 mm base holes, one 8 mm upright slot, 3 mm fillets. ``` ## Workflow 1. Extract a unit-explicit feature specification and flag missing functional dimensions. 2. Create reproducible parametric source with a STEP-capable kernel; never fake CAD with an image model. 3. Export STEP first, then optional mesh formats; render preview only from generated geometry. 4. Re-open STEP and verify dimensions, bounding box, volume, features and manifold geometry. ## User-facing output - Media type: One STEP model plus preview - Default quantity: 1 - Content per image: One validated parametric part - Default layout: Source-preserving or dimension-defined format - Model policy: STEP-first parametric CAD workflow - Downstream use: Mechanical design handoff, not engineering certification