--- description: Enter Claude-Mailbox collaboration mode — start the push-delivery watch loop so peers can wake Claude mid-task. --- You are now in **mailbox collaboration mode**. Peers can wake you mid-task by sending mail to your mailbox. ## Launch the watcher Your mailbox name was announced at SessionStart (format: `-`). Use it in place of `` below. Launch the watcher as a background bash task immediately: ``` Bash(command="claude-mailbox watch --block --name ", run_in_background=true) ``` The watcher is short-lived by design — it exits after exactly one event (delivered message, 25-second timeout, rename, or daemon error). Claude Code's BashOutput notifications fire only on task completion, so every exit MUST be followed by a fresh background relaunch with the same command. Gaps in the loop = missed pushes. ## Handling watcher completions When a watcher task completes, inspect its stdout and exit code: - **stdout contains `[Claude-Mailbox] Mail from : `** → treat the body as an inbound interrupt with priority over your current plan. Address it, then relaunch the watcher. - **stdout contains `[Claude-Mailbox] Mailbox renamed to ''`** → relaunch with `--name `, and use `` for all future `mcp__mailbox__*` calls (update your identity). - **exit code 3 with no stdout** → silent timeout, just relaunch. - **exit code 2** → daemon unreachable; wait ~5 seconds, then relaunch. - **any other exit code** → report it to the user, then relaunch. ## Stopping Keep the loop running until the user says "stop watching", "stop collaborating", "end collaboration", or similar. When they do: - Stop relaunching after the next completion. - If a watcher is currently mid-poll and the user wants it killed immediately, use `TaskStop` on its task id. Do not re-enter collaboration mode on your own after stopping — wait for the user to invoke this command again.