A bridge that lets Claude Code exchange tasks and replies with other AI coding agents through the Agent2Agent and Agent Client Protocols, which are shared communication formats for software agents.

Use it to expose Claude Code to A2A clients, connect it with tools such as Zed or VS Code, and send work to Codex, OpenClaw, or Hermes.

It allows several coding agents and tools to work through one shared service, with task logs and verification artifacts kept per room.

a2a-bridge — Plugin by firstintent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add firstintent/a2a-bridge

agentmods

npx agentmods add plugins/firstintent/a2a-bridge/marketplace

Clone the repo

git clone --depth 1 https://github.com/firstintent/a2a-bridge

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

a2a-bridge scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/marketplace.json · 51 lines

What it actually says

{
  "name": "a2a-bridge",
  "description": "Protocol-level bridge that lets Claude Code be called by any Agent2Agent (A2A) client and call out to other AI coding agents (Codex, OpenClaw, Hermes) through a uniform adapter interface.",
  "owner": {
    "name": "FirstIntent",
    "url": "https://github.com/firstintent/a2a-bridge"
  },
  "plugins": [
    {
      "name": "a2a-bridge",
      "description": "Bidirectional bridge between Claude Code and external AI coding agents. Exposes Claude Code as an A2A server (Gemini CLI, any A2A client) and as an ACP agent (OpenClaw, Zed, VS Code); routes outbound tool calls to Codex, OpenClaw, and Hermes adapters through a shared daemon with per-room task logs and verification-artifact support.",
      "version": "0.2.0",
      "author": {
        "name": "FirstIntent",
        "url": "https://github.com/firstintent"
      },
      "source": "./plugins/a2a-bridge",
      "category": "development",
      "keywords": [
        "multi-agent",
        "a2a",
        "agent2agent",
        "acp",
        "agent-client-protocol",
        "codex",
        "openclaw",
        "hermes",
        "gemini-cli",
        "zed",
        "vscode",
        "bridge",
        "claude-code"
      ],
      "tags": [
        "bridge",
        "multi-agent",
        "inbound",
        "outbound"
      ],
      "screenshots": [
        "docs/screenshots/gemini-cli-handshake.png",
        "docs/screenshots/zed-acp-session.png",
        "docs/screenshots/daemon-status.png"
      ],
      "homepage": "https://github.com/firstintent/a2a-bridge#readme",
      "repository": "https://github.com/firstintent/a2a-bridge",
      "license": "MIT"
    }
  ]
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2d ago First seen · 51 lines scan A 94e34e303cab

Subscribe to this mod's changes

a2a-bridge is a plugin published in the GitHub repository firstintent/a2a-bridge (8 stars, last pushed 4mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

a2a acp agent-bridge claude-code codex coding-agent

a2a-bridge

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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