# Msg

> Inter-agent communication via the msg CLI. Use this when you need to send messages to other agent sessions, read incoming messages, or coordinate with other agents in tmux panes.

- Skill: `pchalasani/msg` (Agent Skill)
- Install (CLI): `npx skillmds@latest add pchalasani/msg`
- Raw SKILL.md: https://api.skillmd.com/api/skills/pchalasani/msg/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: pchalasani (https://skillmd.com/u/pchalasani)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/pchalasani/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.