Who it is forMaker who tried text-to-3D tools and got meshes they could not adjust
The problemText-to-3D tools give you a frozen mesh, so a wrong hole size or wall thickness means starting over.
The outcomeYou get a feature-timeline model where every dimension is still editable after the agent is done.
What you need first
- Windows, macOS or Linux desktop, or just a modern web browser (no install needed)
- Rust toolchain only if building from source
- An MCP-capable agent such as Claude Code only for the agent-driven uses
- No paid keys or accounts
Steps
- Download the app for your OS from the README, or use the browser version.
- Register the MCP server with Claude Code: claude mcp add solidcraft -- solidcraft-cli mcp
- Ask the agent to model your part and describe the key dimensions.
- Open the result and change a dimension in Parameters to confirm it rebuilds.
Prompt for your agent
Using the solidcraft MCP server, model <part description with dimensions> as a parametric design. Expose the key sizes as parameters and tell me which ones to change. Verify the model rebuilds when one parameter changes.
Caveat. The README calls SolidCraft early but usable for simple parts, so complex assemblies from an agent may need manual cleanup.
About solidcraft
An open-source 3D CAD app written in Rust that agents can drive. Part of this week's top 10 repos: ranked #6 on Repo Radar. View tangency-labs/solidcraft on GitHub.
More with solidcraft
- Open and re-export STEP, STL and 3MF files Import a model from another tool and export it as STEP, STL, 3MF, glTF or URDF where supported.
- Check how a small assembly moves before building it Combine parts with joints and run a motion study to spot interference before you print or machine anything.
- Design a 3D-printable case for a dev board Follow the README's Raspberry Pi style workflow: dimensioned sketch, shell, standoffs, port cut-outs, then export for printing.
- Design a bent sheet metal bracket and get its flat pattern Use flanges, hems and fold/unfold to model a bracket, then read out the flat pattern for cutting.
- Try parametric 3D CAD in your browser, no install Open the web app, sketch a shape, extrude it and change a dimension to see the model rebuild.
- Watch an agent build a model live in the open app Connect the MCP server to your running SolidCraft window so you can see each modeling step as the agent makes it.
- Generate a STEP file from a JSON command script Run a saved JSON command list from the CLI so the same part can be rebuilt on demand, no GUI.
Disclaimer
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