mcp-agent-hub: Instructions file for Claude Code

AGENTS.md

mcp-agent-hub AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from avdiam/mcp-agent-hub. It costs 3,342 tokens per session, scanned B, original, MIT.

Project instructions for MCP Agent Hub, a local message broker that lets independent command-line agents communicate. They explain the project structure, current status, and rules for working on it.

In plain words
What is it for?
They help developers work on the hub's Python application, MCP tools, web dashboard, message storage, and session continuity.
Why use it?
They give developers the background and constraints needed to change the project without misunderstanding what it does or how it is organized.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: UserPromptSubmit hook event, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

This is avdiam/mcp-agent-hub's own configuration. It tells Claude Code, Codex and OpenCode how to work on mcp-agent-hub itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-agent-hub configures →

Reuse

Borrowing it

Nothing to install: this file belongs to avdiam/mcp-agent-hub. 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/avdiam/mcp-agent-hub/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/avdiam/mcp-agent-hub

Made for: Claude Code, Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Per session 3,342 This file is loaded in full into every session.
When invoked 3,342 The same file — it is already loaded in full.
Security scan B 1 finding. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.03342 $0.03342
Opus 5.5 $0.01337 $0.01337
Sonnet 5.5 $0.00668 $0.00668
Haiku 4.5 $0.00334 $0.00334

Measured 2mo ago against content hash 59c8eac13d46, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

mcp-agent-hub AGENTS.md scanned grade B with 1 finding 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Both clients run the shared `hub_peek.py` (`.claude/skills/agent-hub-live/scripts/hub_peek.py`) to nudge themselves to call `check_inbox` when `/api/peek` reports pending messages. The script takes `--agent-id` (or `$AGE
AGENTS.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Guidance for AGY when working in the MCP Agent Hub project.

Override notice. This directory sits inside the dokimes skills-sandbox tree, whose parent CLAUDE.md says to treat "build/test/improve" as work on skill/agent definitions, not conventional software development. That does not apply here. MCP Agent Hub is a real, conventional Python application — build, run, and test it as software. This file takes precedence for anything under mcp-agent-hub/.

What this is

MCP Agent Hub is a lightweight local message broker that lets independent CLI agents (e.g. Claude Code, Antigravity) talk to each other. It runs one Python process exposing two interfaces:

  1. An MCP server (Streamable HTTP, at /mcp) with tools for agents to register, discover peers, send messages, and check their inbox.
  2. A FastAPI web dashboard (at /) for a human to observe the agent registry and message queue.

Messages are persisted in SQLite so work survives restarts.

Current status: v1 feature-complete (2026-06-18)

The application is implemented, running, and fully restructured into a package layout. Steps 1–6 of docs/dev/plan.md are done (E2E verified, cross-agent haiku exchange successful). The D19 peek/nudge hook layer is live on both clients. Security review and hardening (D18) is complete, preventing CSRF/DNS-rebinding via Origin/Host/Sec-Fetch-Site validation. Recovery controls (D26) are implemented via /api/reset and /api/restart mapped to a custom run_hub.py supervisor. The test suite is 12/12 green. v1 is successfully sealed.

Post-v1 Workstreams:

  • Workstream 1 (Stress-Test & Stabilize): Complete. Heavy multi-agent load testing identified and resolved SQLite queue contention. db.py locks eliminated via WAL pragmas (busy_timeout/synchronous) and exponential backoff retry wrappers, yielding 100% success at 76+ ops/sec. Persistent connection pooling optimization explicitly deferred.

The design docs remain the source of truth for why; read them before changing behavior:

Read the full file on GitHub · 112 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.

  1. 2mo ago First seen · 112 lines · 3,342 tokens per session scan B 59c8eac13d46

Subscribe to this mod's changes

mcp-agent-hub AGENTS.md is an instructions file published in the GitHub repository avdiam/mcp-agent-hub (0 stars, last pushed 3mo ago), licensed MIT. It adds 3,342 tokens to every session, about $0.0134 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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