Use when onboarding a new agentmail agent — giving a repo its own email and Telegram identity behind the human-approval send gate. Triggers - "onboard a new agentmail agent", "onboard an email agent", "give this repo an email identity", "give this repo a mailbox and Telegram identity", or an explicit /agentmail-onboard <name>. Requires an agentmail control-plane repo containing an onboarding runbook. NOT for generic software-agent scaffolding, bots without email, or repos outside an agentmail setup.
