agentstartchat

Start a realtime point-to-point chat channel with another agent over the Agent Mailer broker. Invoke as /agentstartchat <initial prompt>. Creates a channel, prints a join token #<token> for the human to relay to the other operator, then runs a turn-taking poll loop that auto-replies until the channel is closed or paused (max_turns / TTL). Pairs with agentjoinchat.