Borrowing it
Nothing to install: this file belongs to mlennie/hermes-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mlennie/hermes-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/mlennie/hermes-mcpWrote 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.
[](https://agentmods.dev/instructions/mlennie/hermes-mcp/claude-md)<a href="https://agentmods.dev/instructions/mlennie/hermes-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/mlennie/hermes-mcp/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.02599 | $0.02599 |
| Opus 5 | $0.01300 | $0.01300 |
| Sonnet 5 | $0.00520 | $0.00520 |
| Haiku 4.5 | $0.00260 | $0.00260 |
Grade A, and why
hermes-mcp 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Commands
# Setup
uv venv .venv --python 3.11 && source .venv/bin/activate && uv pip install -e ".[dev]"
# Full CI suite (must all pass)
ruff check . && ruff format --check . && mypy src/ && pytest
# Individual checks
ruff check . # lint
ruff format . # auto-format
mypy src/ # type-check (strict mode, src/ only — mcp module excluded)
pytest # all tests
pytest tests/test_oauth.py # single test file
pytest -k "test_name" # single test by name
# Run / inspect the server
hermes-mcp serve # or: python -m hermes_mcp serve
hermes-mcp doctor # startup self-check (probes the gateway)
hermes-mcp mint-client # generate a fresh OAuth client_id / client_secret
Architecture
hermes-mcp is an MCP bridge that lets MCP clients (today: Claude Desktop / Claude.ai; future: Codex CLI / Cursor / Continue once DCR ships) delegate tasks to a locally running Hermes Agent. The client calls MCP tools (hermes_ask, hermes_check, hermes_cancel, hermes_reset) over an HTTPS tunnel; the bridge gates that with OAuth 2.1 and forwards each call to the Hermes gateway's OpenAI-compatible HTTP API.
Static-client-only constraint. The OAuth provider currently disables Dynamic Client Registration (ClientRegistrationOptions(enabled=False) in build_app; StaticClientProvider.register_client raises NotImplementedError). This means a client can only connect if it supports pasting in a static pre-shared client_id / client_secret. Claude Desktop's Custom Connector UI does. Codex CLI does not (empirically confirmed — codex mcp login auto-attempts DCR and fails). Adding DCR support is a tracked follow-up; tool-description / scheme-allowlist changes in 0.4.0 already removed the other Claude-only assumptions.
MCP client (Claude Desktop / Claude.ai / Codex CLI / Cursor / ...)
│ HTTPS via cloudflared tunnel
▼
hermes-mcp (this project, listening on 127.0.0.1:8765)
├─ OAuth 2.1 (authorization code + PKCE), single static client_id/secret
└─ HTTP POST to the gateway
│
▼
hermes-gateway (127.0.0.1:8642, OpenAI-compatible /v1/chat/completions)
└─ same AIAgent loop that drives Telegram (skills, tools, sessions)
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.
- 8d ago First seen · 92 lines · 2,599 tokens per session scan A d5f3faf3127a
hermes-mcp CLAUDE.md is an instructions file published in the GitHub repository mlennie/hermes-mcp (61 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 2,599 tokens to every session, about $0.0130 per session on Opus 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 2026-08-30.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.