Every other reminder here is addressed to the agent, and quiet is right for those
— somebody watching a build does not need to be told what its orchestrator is
thinking about. This one is different in kind: it starts a process on a person's
machine, and that process reads their code and writes files.

A person must never learn that an agent appeared by finding it in a log
afterwards. So the line naming which agent started, against which commit, and
where its words will land is printed rather than injected quietly.