Describe the part. Watch it take shape.

Six workshops, one process

3D print: from prompt to STL and a print plan for your own slicer. Electronics: KiCad boards with DRC/ERC, gerbers, board-in-enclosure fit. Wood: furniture-grade drawings, BOMs and finishing plans. Metal: welded and bolted frames from steel profiles, sheet-metal flat patterns. CNC & laser: DXF and true-scale PDF. And software, where Robion started.

The home screen shows an example per workshop — a Raspberry Pi case, an ESP32 relay board, a coffee table, a welded gate, a laser-cut grille. A click starts a task on it right away.

The design record and its gates

A design walks through ten stages: idea, brief, concept, model, previews, drawings, materials, build plan, checks, build sheet. The record (design.json) holds the spec, the answers with who decided them — you, a default, or Claude — and the log of changes. Only the pack’s own script writes it; Robion never does.

Each gate is a form in the panel: the question round with recommended answers and “decide for me”, concept variants as cards with one to choose, and an approval screen per produced step with one continue button. Change an earlier answer and the stages it invalidates turn out of date and regenerate. The phone has the same gates in its design tab.

The live customizer

For a parametric model the agent builds a control panel: sliders marked as parameters and the model as the panel’s viewport. Move a slider and the model re-renders — OpenSCAD gets -D key=value, a Python model reads ROBION_PARAMS — in about half a second. Export buttons with hotkeys sit beside it; the stream deck mirrors them.

The 3D panel knows what makers need: a print-bed outline that says whether the model fits, the ghost of the version before the last agent turn, the volume in the readout, SpaceMouse support.

Outputs

The model as parametric code (build123d Python or OpenSCAD) plus STEP and STL; renders; drawings as PDF and DXF; a BOM; a build plan; checks — strength and FEA images, KiCad DRC and ERC; a build sheet. Every artifact is derived from the source and versioned in git like code.

Honest limits: Robion never slices and cuts no toolpaths. A printed part ends at STL and a print plan; a CNC part at DXF and a drawing.

Tools and cost

OpenSCAD, kicad-cli and a Python with build123d are detected automatically or set in ⚙ → Tools, with the print bed size and a render timeout. Without OpenSCAD .scad files do not render; without kicad-cli there is no board check; images, PDF, DXF, SVG and Gerber need no external tool.

The design panel shows what a design costs so far and per step — as a share of your subscription or at API prices. Workshop projects can run the agent with a lower effort, a plain output style and optionally another model, without touching your Claude Code defaults.

No terminal needed

In a workshop project the design panel is the anchor tab and a new task opens no terminal; running agents show as chips with a state dot. A new project — Workshop or Development — can be created on the Mac or from the phone, and the agent’s questions, permissions and photos work on both.