Airsup's machine-skill builds a physics simulation of any machine

An open-source Claude Code skill from Airsup turns one sentence into a running physics model of a machine. The repository was created on 12 October and sits at 206 stars three days later, under MIT. One command gives a reader a standalone HTML page they can open in a browser; a second command renders a 28 second film to post on a feed.

Airsup's own description is tight. "Describe any machine in one line. Claude builds a photoreal, physics based, interactive simulation of it in one HTML file, plus the film to post it." The viewer supports "Explode, cutaway with solid section faces, x-ray, slow motion, live labels, pause, and a computed 'break it.'"

What the solver actually computes

Each machine comes with its own physics solver, which the project enumerates: a Brayton cycle for jet engines, a rocket chamber and nozzle, a slider crank with BMEP for pistons, a torsional oscillator, Cp as a function of blade pitch and tip-speed ratio for wind turbines, pump curves, Kienzle for cutting force, Darcy for pipe friction. The solver "drives every motion and every number", Airsup writes, so the exploded view and the live labels show something the model computed rather than a pre-recorded animation.

The limits are stated plainly in the README. "The physics is a small honest model, not CFD or FEA." Geometry is procedurally generated, "real parts, not a CAD export." The skill is built for "machines, mechanisms, engines, instruments, devices"; "people, landscapes and maps come out weaker". The lab kit is inlined into every output page, so there is no build step and nothing to host.

Which machines Airsup shows

The repository lists worked examples: a turbofan jet engine, a Raptor-style rocket engine, an API 610 refinery pump, an API 617 barrel compressor, a Francis turbine, a Swiss lever escapement and a wind turbine gearbox. These are deep-industry subjects, but the output is a web page any viewer can scrub. The film output carries numbered beats, a music bed, a magenta frame guard for crop and a pink scan for timing, which is a social-media export shape.

Where this fits

A technical writer, a product marketer at an industrial firm, or a mechanical engineering teacher now has a path from a sentence to a shareable, interactive, physics-accurate 3D page without touching Blender, Unity or a CFD license. The output is one HTML file, so hosting is a static upload. The skill is a Claude Code skill, so it slots into the agent workflow that writes everything else in a repository and leaves the physics solver and the geometry in the same place.

Source

machine-skill, Airsup, on GitHub.