DEDUPEDWho it is forHobbyist designing a hinge, linkage or small mechanism
The problemParts that look fine alone can collide or bind once assembled.
The outcomeYou see where parts interfere and can fix dimensions before making a physical copy.
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
- Model or import the individual parts.
- Assemble them and add joints.
- Run a motion study and an interference check.
- Adjust parameters and rerun until the motion is clear.
Prompt for your agent
Using SolidCraft's assemblies, joints and interference tools, walk me through checking <mechanism> for collisions. Tell me what parameter to change if two parts interfere.
Caveat. Motion studies and contact sets are listed as features but the project is early, so validate results with a physical test fit.
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
- Let an AI agent model a part you can still edit Steer an agent through the built-in MCP server and get a real parametric model, not a mesh you can't fix.
- 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.
- 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
Deduped lists open-source repositories that belong to other people. We do not own, maintain, audit, or vouch for any of them, and a repo appearing here is not an endorsement or a safety check. The use cases, steps, and prompts are written by AI and may be incomplete, outdated, or just wrong. Where a use case is marked "Seen in the wild", we link to public posts where someone described something similar, but we have not verified those posts and the use case itself is still our AI's own write-up. Use all of this at your own risk. Only run code, commands, or agents on systems and accounts you are authorized to use, and read the code and every command before you run it, especially anything that touches credentials, files, or the network. Nothing here is professional, security, legal, or financial advice. All trademarks and project names belong to their respective owners, and their use here does not imply affiliation. Content is provided as is, without warranties of any kind. Found a mistake, a safety problem, or something you want removed? Email [email protected] and we will look at it promptly. Full disclaimer page