agmsg
agmsg is an MIT-licensed messaging layer for CLI coding agents. Claude Code, Codex, Gemini CLI, GitHub Copilot CLI, Antigravity, OpenCode and other agents join a named team and send each other messages through a shared local SQLite database, so you stop copying output from one agent into another. The README shows Claude Code asking Codex for a code review and getting the answer back over agmsg.
It deliberately stays small: no MCP server, no broker and no daemon, just bash and sqlite3. Sending appends a row; each agent reads incoming messages through a hook or a Monitor stream depending on the delivery mode, and Claude Code and Codex default to real-time push. The store is WAL-mode SQLite and keeps history after sessions end, so an old room can be replayed into a fresh agent. Install with npx agmsg, the Claude Code plugin marketplace or a git clone; a self-hosted reference server and an optional resident agmsgd service exist for cross-machine setups.
Features
Why choose it
Trade-offs
Maintenance check
- Last commit
- 2026-10-27
- Commits, last 90 days
- 100+
- Releases, last 90 days
- 30
- Latest release
- v1.7.0 (2026-10-27)
- Open issues
- 387
- Recent issues with at least one comment
- 1/23
Status rule: archived on GitHub = Archived; last commit within 90 days = Active; 91 to 365 days = Slowing; older = Stale. All figures come from the GitHub API on the date shown.
Most discussed open issues
- #1187 The proof layer's gone-owner boundary fails intermittently on macOS — and a boundary that moves under load may fall toward a positive verdic20 comments · 2026-09-13
- #300 Monitor が同一プロジェクトの全 claude-code セッションに特定 team-agent 宛メッセージを配送する（identity が project + agent_type だけで解決される）12 comments · 2026-07-03
- #1262 tests/test_watch.bats intermittently hangs an ubuntu shard until the 30-minute job cap11 comments · 2026-09-15
- #1000 Observation record: watch #67 failed once each on three unrelated PRs in one night, and not on main11 comments · 2026-08-26
- #1631 agmsg 1.6.0-rc.3 (agmsgd beta): feedback and known limitations10 comments · 2026-10-15
Issue titles are quoted from GitHub. Open the link to check whether a problem still applies to the version you use.
Use cases
Alternatives
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