What is a2a-bridge CLAUDE.md?

Project instructions for a2a-bridge, a two-way connection between Claude Code and other AI coding agents.

Developing or reviewing peer-agent adapters, multi-machine setups, concurrent sessions, and repository documentation.

They keep repository content in English and set rules for the project's architecture, supported deployments, and adapters.

How firstintent/a2a-bridge configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to firstintent/a2a-bridge. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/firstintent/a2a-bridge/main/CLAUDE.md

Clone the repo

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

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/firstintent/a2a-bridge/claude-md/github.svg)](https://agentmods.dev/instructions/firstintent/a2a-bridge/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/firstintent/a2a-bridge/claude-md"><img src="https://agentmods.dev/badge/instructions/firstintent/a2a-bridge/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/firstintent/a2a-bridge/claude-md"><img src="https://agentmods.dev/badge/instructions/firstintent/a2a-bridge/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,740 This file is loaded in full into every session.

When invoked 1,740 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.01740	$0.01740
Opus 5.5	$0.00696	$0.00696
Sonnet 5.5	$0.00348	$0.00348
Haiku 4.5	$0.00174	$0.00174

Measured 1mo ago against content hash af1239ec4093, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

a2a-bridge CLAUDE.md 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 1mo 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.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — a2a-bridge

Project

a2a-bridge is a bidirectional bridge between Claude Code and other AI coding agents (Codex, OpenClaw, Hermes, ...) built on the Claude Code Channels protocol. Modelled after raysonmeng/agent-bridge but designed from day one for:

Pluggable peer adapters (one adapter per target agent)
Multi-machine deployment (daemon on one host, CC on another)
Multi-room / concurrent CC sessions

Language policy — strict

Everything stored in this git repo MUST be in English:

Source code, including variable names and string literals
All code comments
Commit messages (subject and body)
Pull request titles and descriptions
Issue titles and bodies
File and directory names
README, ARCHITECTURE, ROADMAP, and any other top-level docs

English-language documentation targeted at readers of the repo lives under docs/ and is committed (cookbook, runbooks, subsystem guides). Chinese-language scratchpads — local design notes, meeting memos, translation drafts — live under docs-cn/, which is git-ignored (see .gitignore) and must never be committed.

Rationale: this is an open-source project targeting a global audience. Mixed-language repos fragment the reader base and confuse grep, so the committed tree stays English-only; docs-cn/ exists to keep the local workflow useful without polluting the repo.

Stack

TypeScript, Bun runtime (matches upstream agent-bridge)
MIT license
Two-process topology: foreground MCP plugin + persistent daemon
Peer adapters implement a common IPeerAdapter interface

Architecture constraints — enforced

The src/ tree is organized by runtime + domain, not by abstract "layer number":

src/
  shared/          zero-dep utilities (state-dir, daemon-lifecycle, config-service, logger)
  messages/        shared value objects (BridgeMessage, ...)
  transport/       plugin <-> daemon control plane
  runtime-plugin/  code that runs inside the Claude Code MCP plugin
    claude-channel/    MCP channel adapter
    daemon-client/     client side of the control plane
    bridge.ts          plugin process entrypoint
  runtime-daemon/  code that runs inside the persistent daemon
    peers/             outbound peer adapters (codex, openclaw, hermes)
    inbound/           A2A server exposing Claude Code to external clients
    rooms/             RoomRouter
    tasks/             Task lifecycle + storage
    daemon.ts          daemon process entrypoint
  cli/             user-facing CLI; composition root for integration tests

Read the full file on GitHub · 167 lines

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.

1mo ago First seen · 167 lines · 1,740 tokens per session scan A af1239ec4093

Subscribe to this mod's changes

a2a-bridge CLAUDE.md is an instructions file published in the GitHub repository firstintent/a2a-bridge (10 stars, last pushed 6mo ago), licensed MIT. It adds 1,740 tokens to every session, about $0.0070 per session on Opus 5.5. 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.

Claude Code a2a acp agent-bridge codex coding-agent

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

a2a-bridge: Instructions file for Claude Code

Borrowing it

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

CLAUDE.md — a2a-bridge

Project

Language policy — strict

Stack

Architecture constraints — enforced

What this file has done since we first saw it

Other instructions, from other repositories

vscode buildNext.instructions.md

next.js AGENTS.md

vscode oss-third-party-notices.instructions.md

langchain AGENTS.md

vscode copilot-instructions.md

vscode model-prompts.instructions.md