Borrowing it
Nothing to install: this file belongs to akutishevsky/lunchmoney-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/akutishevsky/lunchmoney-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/akutishevsky/lunchmoney-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/akutishevsky/lunchmoney-mcp/claude-md)<a href="https://agentmods.dev/instructions/akutishevsky/lunchmoney-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/akutishevsky/lunchmoney-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/akutishevsky/lunchmoney-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/akutishevsky/lunchmoney-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 | $0.01628 | $0.01628 |
| Opus 5 | $0.00814 | $0.00814 |
| Sonnet 5 | $0.00326 | $0.00326 |
| Haiku 4.5 | $0.00163 | $0.00163 |
Grade A, and why
lunchmoney-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 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.
How it starts
The opening of the file, as written. The whole thing — 109 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
MCP (Model Context Protocol) server for the LunchMoney personal finance API (v2). Provides 59 tools across 10 domains (transactions, categories, budgets, manual accounts, tags, recurring items, user, Plaid accounts, crypto, balance history). Uses stdio transport and is published to npm as @akutishevsky/lunchmoney-mcp.
Commands
-
npm run build— compile TypeScript and chmod the entry point -
npm run build:mcpb— build + package as.mcpbfor Claude Desktop -
npm run dev— run with MCP Inspector (setLUNCHMONEY_API_TOKENin the script first) -
npm run format— run Prettier on the entire codebase -
npm test— build, then run the test suite with Node's built-in runner
Tests live in test/*.test.mjs and are plain ESM JavaScript, not TypeScript: tsconfig.json sets rootDir: ./src, so tests can't be compiled by the main build. They import the compiled output from build/, which is why npm test builds first — that also makes the run a typecheck. Shared fixtures (sandbox directories, magic-byte samples, env-var juggling) live in test/helpers.mjs; use them rather than rolling new ones.
Coverage is currently limited to src/attachments.ts, the security-sensitive path from issue #16. The tool handlers themselves are still exercised manually via npm run dev with the MCP Inspector against a real LunchMoney account.
npm run lint is currently broken — typescript-eslint does not yet support TypeScript 7. This predates the test suite.
A husky pre-commit hook runs npm run format automatically before every commit.
Architecture
Entry point: src/index.ts — creates McpServer, registers all tool modules, initializes config, connects via StdioServerTransport.
Config: src/config.ts — singleton initialized at startup via initializeConfig(). Requires LUNCHMONEY_API_TOKEN env var. Base URL (https://api.lunchmoney.dev/v2) is hardcoded. Access via getConfig().
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 · 109 lines · 1,628 tokens per session scan A b7cd01199d2b
lunchmoney-mcp CLAUDE.md is an instructions file published in the GitHub repository akutishevsky/lunchmoney-mcp (103 stars, last pushed 1mo ago), licensed MIT. It adds 1,628 tokens to every session, about $0.0081 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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