What is render?

This is a skill plugin for Claude Code, Anthropic's command-line AI coding tool, that lets you generate 3D models just by typing a plain-English description. You type something like "/render a gear with 12 teeth" and the AI writes the code needed to produce that shape, runs it automatically, and opens a 3D viewer in your browser within seconds. The underlying 3D modeling is done by a Python library called build123d, which works with precise, mathematically defined shapes rather than sculpted meshes (similar to engineering CAD software). The browser viewer is built with Three.js, a popular web 3D graphics library, and supports orbit controls so you can spin, zoom, and inspect the model from any angle. The viewer includes a code editor panel where you can tweak the generated parameters and re-render with a keyboard shortcut. You can also export models in STEP format, which is a standard file type that can be opened in most CAD programs or sent to a 3D printer slicer. A particularly useful feature is region-based editing: you can draw a box over any part of the 3D model in the viewer, type an instruction like "make this hole bigger," and the AI will modify just that part of the model. These edit requests can be processed on demand or automatically picked up as they come in. Installation requires only Python 3.10 or newer and Claude Code. Cloning the repository into your Claude Code skills directory and running the first render takes care of all other dependencies automatically.