msg

# msg: Inter-Agent Communication You can communicate with other coding agent sessions (Claude Code or Codex CLI) using the `msg` CLI tool. ## Registration Before sending or receiving messages, register yourself: ```bash msg register <your-name> ``` This auto-detects your tmux pane. You only need to do this once per session. ## Sending Messages Send a message directly to another agent: ```bash msg send <agent-name> "Your message here" ``` Send to multiple agents: ```bash msg send agent1,agent2 "Message for both of you" ``` ## Replying ```bash msg reply <agent-name> "Your reply here" ``` ## Receiving Messages Check your inbox: ```bash msg inbox ``` This shows all unread messages grouped by thread and marks them as read. ## Other Commands ```bash msg list # List registered agents msg threads # List active threads msg status # Check system health ``` ## Guidelines - Keep messages concise -- they consume context in the receiving agent's session. - When replying, include enough context that the recipient understands without re-reading the full thread. - If you need to share code or file paths, reference them in the message text rather than pasting large blocks.