What is hatago-mcp-hub CLAUDE.md?

Repository-specific instructions for Hatago MCP Hub, a lightweight service that manages multiple MCP servers. They describe its TypeScript and Hono setup, project structure, commands, and supported runtimes.

Developing, building, testing, and formatting the MCP hub and its server packages across Node.js, Cloudflare Workers, Bun, or Deno.

They give Claude Code the project context needed to make changes that fit the repository's tools and architecture.

How himorishige/hatago-mcp-hub configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to himorishige/hatago-mcp-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/himorishige/hatago-mcp-hub/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/himorishige/hatago-mcp-hub

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/himorishige/hatago-mcp-hub/claude-md/github.svg)](https://agentmods.dev/instructions/himorishige/hatago-mcp-hub/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/himorishige/hatago-mcp-hub/claude-md"><img src="https://agentmods.dev/badge/instructions/himorishige/hatago-mcp-hub/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/himorishige/hatago-mcp-hub/claude-md"><img src="https://agentmods.dev/badge/instructions/himorishige/hatago-mcp-hub/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,242 This file is loaded in full into every session.

When invoked 3,242 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	$0.03242	$0.03242
Opus 5	$0.01621	$0.01621
Sonnet 5	$0.00648	$0.00648
Haiku 4.5	$0.00324	$0.00324

Measured 11d ago against content hash d48c984056f7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

hatago-mcp-hub 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 11d 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 · 463 lines

How it starts

The opening of the file, as written. The whole thing — 463 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.

Project Overview

Hatago MCP Hub is a lightweight MCP (Model Context Protocol) hub server that manages multiple MCP servers. Built on Hono with a simplified architecture focusing on essential functionality while maintaining extensibility.

Tech Stack

Runtime: Node.js 20+ / Cloudflare Workers (Bun/Deno in development)
Language: TypeScript with ESM modules
Web Framework: Hono
MCP SDK: @modelcontextprotocol/sdk (requires Zod schemas for tools)
Build Tool: tsdown
Test Framework: Vitest
Linter/Formatter: ESLint + Prettier
Package Manager: pnpm

Project Structure

/
├── packages/
│   ├── mcp-hub/        # Main npm package (@himorishige/hatago-mcp-hub)
│   │   ├── src/
│   │   │   └── node/
│   │   │       └── cli.ts    # CLI entry point with subcommands
│   │   └── package.json
│   │
│   ├── server/         # Server implementation (@himorishige/hatago-server)
│   │   ├── src/
│   │   │   ├── index.ts      # API exports (startServer, generateDefaultConfig)
│   │   │   ├── http.ts       # HTTP mode
│   │   │   ├── stdio.ts      # STDIO mode
│   │   │   ├── config.ts     # Configuration management
│   │   │   └── utils.ts      # Utilities
│   │   └── package.json
│   │
│   ├── hub/            # Hub core (@himorishige/hatago-hub)
│   │   ├── src/
│   │   │   ├── hub.ts              # Main hub (thin orchestrator)
│   │   │   ├── types.ts            # Core types
│   │   │   └── ...
│   │   └── package.json
│   │
│   ├── core/           # Shared types (@himorishige/hatago-core)
│   ├── runtime/        # Runtime components (@himorishige/hatago-runtime)
│   ├── transport/      # Transport layer (@himorishige/hatago-transport)
│   └── cli/            # CLI tools (development only)
│
├── schemas/            # JSON Schema definitions
│   ├── config.schema.json    # Configuration schema
│   └── example.config.json   # Example configuration
│
├── examples/           # Usage examples
│   ├── node-example/   # Node.js example with TypeScript
│   └── workers-example/# Cloudflare Workers example
│
└── docs/               # Documentation
    ├── architecture.md # System architecture
    └── configuration.md# Configuration guide

Read the full file on GitHub · 463 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.

11d ago First seen · 463 lines · 3,242 tokens per session scan A d48c984056f7

Subscribe to this mod's changes

hatago-mcp-hub CLAUDE.md is an instructions file published in the GitHub repository himorishige/hatago-mcp-hub (27 stars, last pushed 12mo ago), licensed MIT. It adds 3,242 tokens to every session, about $0.0162 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.

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