agmsg
agmsg is a messaging tool that lets CLI AI coding agents like Claude Code and Codex send messages to each other locally for developers running several agents.
What it is good for
- Passing messages between Claude Code and Codex without copy-pasting
- Asking one coding agent to review another agent's code
- Keeping a durable message history for a team of local agents
At a glance
- Who it is for
- Setup
- Guided command-line setup
Level 4 of 5. You copy and paste commands into a terminal by following the instructions. Comfortable territory for vibe coders.
- Cost
- Free and open source
- Type
- Other
- Tasks
- Works with
- Claude Code, Codex, Gemini CLI, GitHub Copilot CLI, Antigravity, OpenCode
Momentum
- Rank this week
- Not ranked yet
- Best rank
- None yet
- GitHub stars
- 1,576
GitHub numbers as of Nov 2, 2026. Updated weekly.
Official links
Setup steps are on the official pages. We do not repeat them here, since they change.
Questions
- Is agmsg free?
- Yes. It is free and open source (MIT license).
- Do I need to know how to code to use agmsg?
- You do not need to write code, but setup means copying and pasting commands into a terminal by following its instructions.
- What does agmsg work with?
- According to its own documentation, it works with Claude Code, Codex, Gemini CLI, GitHub Copilot CLI, Antigravity, and OpenCode.
- What is agmsg good for?
- Passing messages between Claude Code and Codex without copy-pasting, asking one coding agent to review another agent's code, and keeping a durable message history for a team of local agents.
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