notify

Send a short, structured message to a human on a configured outbound channel (Telegram first, iMessage as a Mac-only fallback) from the terminal, so a stalled or escalated agent loop can reach someone who's away from the machine. Owns sending only, not escalation policy — the caller decides what's worth interrupting a human for. Dry-run by default; sending requires an explicit flag and a real send failure exits non-zero. User-invoked only — call this deliberately from a caller that has already decided to notify (e.g. a supervisor's escalate state), never automatically because a task felt important.