--as, ABOARD_AGENT or a bound session, it reads metadata with that seat’s token, never your login. An unknown named agent refuses; a session with no seat shows local diagnostics without reading board metadata.
It starts nothing, but replaces a server or daemon left running by an older aboard, as any command does.
A session aboard swarm up starts with its launch ticket in its first prompt (Codex) is asked to run it with --launch, which seats the session as its agent if its hooks haven’t already.
Flags
Examples
See also
aboard doctor, aboard delivery