Send outbound messages on a user's behalf with deduplication, idempotency keys, and an explicit send gate. Use this skill whenever the user mentions send email, outbound message, deduplication, idempotency key, send gate, recipient verification, draft before send, or is working with Gmail, Outlook, Resend, even if they never say "agent email dispatch" explicitly. Operates entirely on context the agent already has. Do not use it for unrelated application feature work or general coding questions.
