design-model

3D Model Design

Help the user design a 3D-printable model using the create_model MCP tool.

Workflow

1. Clarify the user's design intent — dimensions, shape, purpose, material
2. Write build123d Python code that assigns the final shape to result
3. Call create_model with a descriptive name and the code
4. Call measure_model to verify dimensions
5. Call analyze_printability to check for printing issues
6. If issues are found, iterate on the design
7. When ready, use the print-prep skill to optimize for printing

build123d Guidelines

• All dimensions are in millimeters
• The final shape must be assigned to result
• Use Box, Cylinder, Sphere for primitives
• Use fillet and chamfer for edge treatments
• Use extrude, revolve, sweep, loft for complex shapes
• Use boolean operations via combine_models for multi-body designs
• Target Bambu Lab X1C build volume: 256 x 256 x 256 mm
• Minimum wall thickness: 1.2mm for FDM printing
• Add fillets (>=0.5mm) to reduce stress concentrations

Session Management

• list_models — See all models in the current session
• get_model_code — Retrieve the build123d code used to create any model (useful for iteration)
• import_model — Bring in an existing STL or STEP file to work with

What To Do Next

After creating a model, suggest the appropriate next skill:

• modify-model — To shell, split, add text, combine with other parts, or generate drawings
• mechanical-parts — If the user needs threads, fasteners, bearings, or other mechanical parts
• parametric-components — For ready-made enclosures, gears, snap-fits, hinges, dovetails, labels
• print-prep — To analyze printability, optimize orientation, and estimate cost
• publish-model — To share the model on GitHub, Thingiverse, or other platforms