Running several agents at once

Activity icons — a grey spinner while a pane produces output, so you can see who is working; agent panes get the richer agent state icons instead (every agent except OMP, which keeps the grey spinner).
Broadcast input — ⌘/Ctrl + Shift + B, then Alt + Click panes into the group and type once; every pane receives the same keystrokes ("now run the tests" × 5). Esc leaves.
Mobile Remote — the title-bar button is a preview of an upcoming feature: watching panes live, chatting into them and approving agent prompts from your phone. For now it opens a short animated explainer; nothing connects yet.
A badge counts Meeting Room messages queued for a pane that is busy.