Stream it
Watch the interface build line by line. Lines that have not arrived yet stay dimmed, and the preview grows with them.
Edit A2UI, watch Weaver render it, and break it on purpose.
Use the preview. Every input and action shows up here.
The current surface's data model. It is rebuilt from the text, and it changes when you use the preview.
The prompt for the Basic Catalog, in create mode.
Watch the interface build line by line. Lines that have not arrived yet stay dimmed, and the preview grows with them.
Cut a line short, as a model might. Weaver skips it, shows a typed error and explains why nothing on screen changed.
Click, type and step through the example. Every input and action lands in Events, newest first.