App-wide overlays

bb 0.43.3·SDK 0.4.104·pinned e865697 (desktop-v0.43.3)

experimental The bb app window #15 in group Show on the zone map

Mounts floating plugin UI across the bb app, outside route-owned layout regions. With this, a plugin can:

What it gives you

• Render a persistent widget once per bb window while the plugin is enabled
• Use app-level SDK hooks and preserve their React context through portals
• Own the widget's chrome, position, visibility, and responsive behavior
• Coexist with other overlays while crashes remain isolated to the overlay that failed

API

Each symbol links to the pinned commit it was read at.

• ExperimentalAppOverlayRegistration interface
• ExperimentalAppOverlayProps interface

Brief for agent…as a bb mentionAdd to set

The brief is Markdown, written for a coding agent: what the capability is, where it registers, every SDK symbol with a pinned permalink, the rules that bite, and what done means.