Borrowing it
Nothing to install: this file belongs to qlitre/japan-tariff-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/qlitre/japan-tariff-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/qlitre/japan-tariff-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/qlitre/japan-tariff-mcp/claude-md)<a href="https://agentmods.dev/instructions/qlitre/japan-tariff-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/qlitre/japan-tariff-mcp/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.
<a href="https://agentmods.dev/instructions/qlitre/japan-tariff-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/qlitre/japan-tariff-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00454 | $0.00454 |
| Opus 5.5 | $0.00182 | $0.00182 |
| Sonnet 5.5 | $0.00091 | $0.00091 |
| Haiku 4.5 | $0.00045 | $0.00045 |
Grade A, and why
japan-tariff-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 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.
What it actually says
CLAUDE.md
日本語で返してください。 This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
日本の関税率をキーワードから返すプロジェクトです。 This is a Cloudflare Workers application that implements an MCP (Model Context Protocol) server using Hono framework. The application provides tariff data search functionality through MCP tools.
Architecture
- Framework: Hono.js for HTTP routing
- Runtime: Cloudflare Workers with Durable Objects
- MCP Integration: Uses
@modelcontextprotocol/sdkandagents/mcpfor MCP server functionality - Data: Tariff data stored as JSON files in
src/tariffdata/(96 chapters, 15,450+ items) - Type Safety: TypeScript with strict configuration
Key Components
src/index.ts: Main application entry point with MyMCP class extending McpAgentsrc/tariffdata/: Contains tariff data JSON files (j_01 through j_97)wrangler.jsonc: Cloudflare Workers configuration with Durable Objects setup
Development Commands
# Install dependencies
npm install
# Start development server
npm run dev
# Deploy to Cloudflare Workers
npm run deploy
# Generate Cloudflare types
npm run cf-typegen
MCP Implementation Details
The application exposes MCP tools at the /mcp endpoint. The MyMCP class:
- Extends
McpAgent<Env> - Registers tools in the
init()method - Currently implements
searchTarifftool with keyword parameter - Uses Zod for parameter validation
Cloudflare Workers Configuration
- Uses Durable Objects with
MyMCPclass - SQLite classes migration configured for free tier
- Node.js compatibility enabled
- Observability enabled
Data Structure
Tariff data is organized in chapters (01-97) with structured JSON containing:
- Chapter metadata and titles
- Category information with HS codes
- Item counts and descriptions
- Total of 15,450+ tariff items across 96 chapters
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 · 65 lines · 454 tokens per session scan A beb9eaff3840
japan-tariff-mcp CLAUDE.md is an instructions file published in the GitHub repository qlitre/japan-tariff-mcp (9 stars, last pushed 6d ago), licensed MIT. It adds 454 tokens to every session, about $0.0018 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.
japan-tariff-mcp CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| japan-tariff-mcp CLAUDE.mdqlitre/japan-tariff-mcp | Instructions file | 9 | 6d ago | MIT | A | 454 | Claude Code |
| plan-forge dapr.instructions.mdsrnichols/plan-forge | Instructions file | 6 | 2d ago | MIT | A | 4,975 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
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| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |