UI Methods
The $.ui noun that draws and manages the interface - transcript lines, toasts, panes, scroll, focus, and the clipboard.
UI Events
The events that fire when Claude Code draws part of the interface, when a person uses a control a mod drew, and when $.ui methods run.
Surfaces, Elements, and Render Sites
What a mod may draw and where - the surfaces, the 15 render sites with their props, and the JSX globals.