RocketSmith

Let agents design, simulate, and build your rocket.

RocketSmith is an end-to-end model-rocket toolchain exposed as an MCP extension. It orchestrates OpenRocket (flight simulation), build123d (parametric CAD), and PrusaSlicer (FDM slicing) behind a single agent, and closes the loop by feeding real printed-part weights back into the simulation for post-build stability verification.

Install

RocketSmith integrates with AI coding tools through their native plugin/extension interfaces for MCP. A uv package is also available for CLI usage and direct API access.

Gemini CLI (extension)

gemini extensions install https://github.com/ppak10/RocketSmith

The extension registers the MCP server, orchestrator agent, domain subagents (openrocket, cadsmith, prusaslicer), and action skills automatically.

Claude Code (plugin)

Register the RocketSmith marketplace and install the plugin:

/plugin marketplace add ppak10/RocketSmith
/plugin install rocketsmith@rocketsmith

This installs the full plugin — MCP server, orchestrator agent, domain subagents (openrocket, cadsmith, prusaslicer), action skills, and session hooks. Update with /plugin update rocketsmith.

CLI / API

uv tool install rocketsmith

This installs the rocketsmith CLI for direct command-line usage and makes the Python API available for scripting. The CLI is independent of any AI coding tool — use it for automation, CI, or standalone workflows.

First run

@rocketsmith design and build a stable rocket for a D12 motor

The orchestrator will walk through simulation → CAD → slicing → mass calibration, pausing for user feedback during the interactive CAD phase.

Documentation

Full documentation lives in the wiki:

• Home — pipeline overview, domain agents, and MCP tool list
• Installation — plugin/extension setup and dependency troubleshooting
• Skills — stability analysis, motor selection, CAD handoff, print preparation, mass calibration
• Hooks — session-start dependency checks and other hooks

Requirements

• Java runtime — required by OpenRocket
• OpenRocket 23.09 — RocketSmith uses orhelper, which targets the net.sf.openrocket package present in OpenRocket 23.09 and earlier. OpenRocket 24+ is not currently supported.
• PrusaSlicer (optional, only needed for the CAD → print → calibration loop)

License

See LICENSE.