ComposerField

DM surface — type @ for the mention menu (agents pinned, broadcast tokens, people), / for the slash palette, the emoji button for the picker, and the + button for the attach menu. Enter sends; the schedule chevron appears once non-empty.

Workspace surface — taller input with a cycling placeholder; the + opens the richer WorkspaceAttachMenu (files, screenshot, GitHub, Skills, Connections, toggles). No emoji / format / schedule on this surface.