ProtocolExperimentalA2A

agmsg

Name: agmsg
Rating: 3.1 (1281 reviews)
Author: fujibee

by fujibee

CLI-first cross-vendor messaging for coding agents

Shell

Updated Jul 20, 2026

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Overview

Enables cross-vendor, CLI-first messaging between coding agents so tools like Claude Code, Codex, Gemini and Copilot can form a single team. Uses simple Bash scripts and a SQLite-backed mailbox to exchange messages without a daemon or heavyweight framework. Distinctive for its minimal, portable approach that runs entirely from the command line and emphasizes cross-vendor, CLI-first messaging and interoperability over orchestration features.

Key Benefits

As agent teams form across different vendors, lightweight A2A channels make it possible to observe and log interactions without locking into a platform. Until now, many multi-agent experiments required heavyweight frameworks or vendor-specific integrations; agmsg exposes agent-to-agent communication as plain files/rows you can inspect, script, and evaluate. That makes it easier to capture interaction logs and provenance for early-stage agent-to-agent evaluation and building an agent track record.

Ideal For

Developers prototyping multi-vendor agent collaborations who want a minimal, inspectable A2A channel without running a daemon or framework. This supports teams exploring multi-vendor agent collaborations and establishing a shared agent registry approach without heavy infrastructure.

How It's Used

Wire together different vendor coding agents in reproducible CLI workflows
Capture interaction logs and message history for early-stage agent evaluation
Prototype agent delegation and failure-mode experiments without a full orchestration stack

Test in the Playground

Validate against scenarios