What is mcp-a2a-bridge AGENTS.md?

Project instructions for `mcp-a2a-bridge`, a Python bridge between MCP tools and A2A agents. A2A is a protocol for AI agents to communicate with one another; the project also has an optional web dashboard.

Installing and running the bridge in MCP-only or dashboard mode, connecting it to A2A agents, and contributing changes with tests and security checks.

They explain which setup to choose, which parts are optional, and how to build and test the bridge safely.

How TonPC64/mcp-a2a-bridge configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to TonPC64/mcp-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/TonPC64/mcp-a2a-bridge/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/TonPC64/mcp-a2a-bridge

Made for: Codex, OpenCode.

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/tonpc64/mcp-a2a-bridge/agents-md/github.svg)](https://agentmods.dev/instructions/tonpc64/mcp-a2a-bridge/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/tonpc64/mcp-a2a-bridge/agents-md"><img src="https://agentmods.dev/badge/instructions/tonpc64/mcp-a2a-bridge/agents-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/tonpc64/mcp-a2a-bridge/agents-md"><img src="https://agentmods.dev/badge/instructions/tonpc64/mcp-a2a-bridge/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 543 This file is loaded in full into every session.

When invoked 543 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	$0.00543	$0.00543
Opus 5.5	$0.00217	$0.00217
Sonnet 5.5	$0.00109	$0.00109
Haiku 4.5	$0.00054	$0.00054

Measured 2mo ago against content hash e89426c3e402, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-a2a-bridge AGENTS.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 2mo 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.

AGENTS.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI README

This file is the fast-start guide for coding agents working on mcp-a2a-bridge. Read it before changing code, then read the relevant skill:

skills/setup/SKILL.md — install and run MCP-only or MCP + dashboard.
skills/contribute/SKILL.md — branch, test, security review, commit, and PR workflow.

Project map

src/mcp_a2a_bridge/ — core MCP bridge, A2A client, registry, activity store, optional dashboard backend.
examples/copilot_a2a_agent/ — optional Copilot A2A server example.
dashboard/ — optional React/Vite dashboard frontend.
tests/ — Python tests, including integration coverage.
.github/workflows/ci.yml — CI for Python and dashboard.

Choose a setup

MCP-only (no dashboard runtime or Node/npm):

uv venv --python 3.11
uv pip install -e .
uv run mcp-a2a-bridge

MCP + dashboard:

uv venv --python 3.11
uv pip install -e ".[dashboard]"
npm --prefix dashboard ci
npm --prefix dashboard run build
uv run mcp-a2a-bridge-dashboard

Set A2A_BRIDGE_DASHBOARD=1 on bridge processes whose activity should appear in the dashboard. The dashboard defaults to 127.0.0.1:9100. A non-loopback bind without a token is for trusted LANs only; use a strong A2A_BRIDGE_DASHBOARD_TOKEN, TLS, and network controls for protected access. Never expose the dashboard directly to the public internet.

For frontend-only screenshots, run npm --prefix dashboard ci then npm --prefix dashboard run dev:mock -- --host 0.0.0.0. This opt-in mode uses local mock snapshots instead of the dashboard API/SSE; normal builds stay live.

Agent rules

Read AGENTS.md and the relevant skill before editing.
Preserve MCP-only installs: dashboard dependencies belong in the dashboard extra.
Do not commit credentials, local registry files, .venv, node_modules, or generated screenshots.
Prefer small, tested changes; preserve existing APIs and SSE contracts.
Run the verification commands in skills/contribute/SKILL.md before reporting completion.
Do not claim a browser/CDP check, test, commit, push, or PR exists unless it actually ran.

Read the full file on GitHub · 51 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.

2mo ago First seen · 51 lines · 543 tokens per session scan A e89426c3e402

Subscribe to this mod's changes

mcp-a2a-bridge AGENTS.md is an instructions file published in the GitHub repository TonPC64/mcp-a2a-bridge (0 stars, last pushed 2mo ago), licensed MIT. It adds 543 tokens to every session, about $0.0022 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.

Building agents a2a ai-agents coding-agents developer-tools fastapi mcp

mcp-a2a-bridge AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp-a2a-bridge AGENTS.mdTonPC64/mcp-a2a-bridge	Instructions file	0	2mo ago	MIT	A	543	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

mcp-a2a-bridge: Instructions file for Codex