The Heron chat widget is

The Heron chat widget is the product's main touchpoint. It floats over the architect's design software, answers questions about the model, and executes changes once approved.

Designing UI that lives inside another application changes the constraints. It has to hold legibility over dense linework, keep a small footprint, stay clearly branded without competing with the host software, and dismiss cleanly.

The product page demonstrates rather than describes. The widget is shown over a real floor plan, mid-conversation about an HVAC clearance issue, with the affected room highlighted in the drawing behind it. The surrounding layout is kept deliberately quiet so the widget holds the visual weight.