developing-kcl

Parametric 3D CAD with code uses KCL, a language that lets you define geometry through variables and expressions. KCL enables precise control over dimensions, hole patterns, and features—change a parameter once and your entire model updates automatically, avoiding repetitive manual redesign.

KCL (KittyCAD Language) is a code-first approach to CAD that uses immutable variables, pipeline operators, and unit-aware values to generate parametric 3D geometry. Write logic in .kcl files, and KCL compiles your code into precise 3D models ready for export or iteration.

Yes. The zoo CLI tool lints, formats, and exports KCL models directly to STL and other formats, automating your entire workflow from code to production-ready output without manual steps.

KCL enforces standardized file structure, tagging conventions, and integrated workflows that handle hole patterns and geometry relationships reliably. Use the pipeline operator to chain operations and maintain consistent, reproducible designs across iterations.

The zoo CLI is the integrated tool for linting and validation in KCL workflows. It catches errors early, ensures code quality, and prepares your models for export in a single step.

Yes. Code-first CAD in KCL excels at rapid iteration—adjust input variables to generate design variations instantly without rebuilding geometry manually, making it ideal for parametric mounting plates, customizable components, and design exploration.