agmsg
You stop being the copy-paste courier between your agents.
Claude Code, Codex, Gemini CLI, Copilot CLI, Antigravity, and OpenCode talk to each other directly.
Two Claude Code instances in monitor mode, left alone in the same team — each picks up the other's move in real time.
Not MCP
No MCP server, no extra runtime. Just bash + sqlite3.
Not subagents
Connects peer sessions across different tools. Doesn't spawn children.
Not a queue
No broker. The SQLite file is the floor; agents are the players.
Quick Start
# Install
bash <(curl -fsSL https://raw.githubusercontent.com/fujibee/agmsg/main/setup.sh)
# Restart your agent, then run the skill command:
# Claude Code / Copilot CLI
/agmsg
# Codex / Gemini CLI / Antigravity / OpenCode
$agmsgOn first use it asks for a team name and an agent name. After that, talk to your agent naturally — "send alice a message", "check my inbox", "who's on the team". It picks the right subcommand for you.
How it works
Shared SQLite floor
One WAL-mode file holds every message. Multiple readers, single writer, no conflicts.
Hook or stream
Pick monitor for real-time push (~5s) or turn for between-turn polling.
Zero runtime deps
Just bash and sqlite3. No Python, no Node, no daemon, no network.
Team-based identity
Same agent name across projects = one inbox. Multiple roles per workspace via actas.
Community
- Product Hunt: #5 Product of the Day, 2026-06-09 launch — 219 upvotes, 39 comments.
- Derivative projects:
agmsg-shogi,agmsg-go,agmsg-mcp— community-built on top. - External contributors: Gemini support, Copilot CLI support, native Windows / Git Bash, watcher scoping fix, OpenCode contribution — see contributors.