Agentic CAD · Rhino 8 plug-in · 2025 — 2026

STF
Agent.

Describe a building, or attach a reference. It builds native, layered geometry inside Rhino — and checks its own work.

C# · .NET 7 · RhinoCommon · Grasshopper
41 modelling tools · Claude, OpenAI, Gemini

Try the panel

Try the real panel below

Skyweave · a turn, replayed

One sentence in.
A tower out.

The agent’s transcript on the left is replayed against the model states it produced on the right — every frame is the Rhino document at that moment. Hover the tower to scrub; click any line to jump.

STEFRhino 8 · build · Skyweave0%
SiteCoreFloorsSkinGardensExplode
playing

Interactive

The real panel.
A simulated Rhino.

The plug-in’s actual front-end, with its Rhino host replaced by a scripted one. Send a prompt and watch the turn unfold — plan, tools, stages, a viewport capture back in the chat.

Or type your own message in the panel. Nothing leaves your browser.

STEF · Rhino 8 · docked panel

How a turn works

Plan. Build. Check. Report.

In use

From a sentence to a site.

Recorded sessions in Rhino 8, shown at full size — no cuts inside a turn.

Skyweave — a tower study developed with the agent at STF Labs: massing, screens, glazing, gardens, core.
Stadium — modelled from one prompt, live in the docked panel.
Tower on a Canary Wharf plot — from a map capture and a reference image.
“Model the Vessel” → “Make it parametric in GH” — hex stair lattice from reference images, then a Grasshopper definition.
Mixed-use block — slabs, columns, façade module and layers in one turn.
Bridge — form, then a space-frame truss over the deck.
Grasshopper target — components placed and wired by the agent.