What is poc_todo_mcp_server CLAUDE.md?

A project instruction file named CLAUDE.md for a TypeScript server that manages to-do items through the Model Context Protocol, a standard way for AI tools to use external tools and data.

Use it when developing the server, compiling or running it, cleaning build files, or testing it with the MCP Inspector.

It gives Claude the project's structure, commands, and testing method in one place. This reduces guesswork when building, running, or checking the server.

How cateland/poc_todo_mcp_server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to cateland/poc_todo_mcp_server. 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/cateland/poc_todo_mcp_server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/cateland/poc_todo_mcp_server

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/cateland/poc_todo_mcp_server/claude-md/github.svg)](https://agentmods.dev/instructions/cateland/poc_todo_mcp_server/claude-md)

Your own site

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

Per session 812 This file is loaded in full into every session.

When invoked 812 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	$0.00812	$0.00812
Opus 5	$0.00406	$0.00406
Sonnet 5	$0.00162	$0.00162
Haiku 4.5	$0.00081	$0.00081

Measured 8d ago against content hash 5e24a4f55009, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

poc_todo_mcp_server 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.

CLAUDE.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 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

This is a Model Context Protocol (MCP) server implementation for todo management, built with TypeScript and the official MCP SDK. The server provides AI-powered todo management through tools, resources, and prompts.

Development Commands

Build and Run

npm run build - Compile TypeScript to JavaScript in ./dist/
npm run dev - Run server in development mode with hot reload using tsx
npm start - Run the compiled server from dist/index.js
npm test - Test the server using MCP Inspector tool
npm run clean - Remove compiled dist/ directory

MCP Testing

Use the MCP Inspector for testing: npx @modelcontextprotocol/inspector tsx src/index.ts

Architecture

Core Components

MCP Server Setup (src/index.ts):

Uses McpServer from the official SDK with auto-capability discovery
Implements StdioServerTransport for MCP communication
Provides comprehensive error handling with graceful failures
Includes sample data initialization for demonstration

Data Model:

interface Todo {
  id: string;
  title: string;
  description?: string;
  completed: boolean;
  priority: 'low' | 'medium' | 'high';
  createdAt: Date;
  updatedAt: Date;
  tags: string[];
}

Storage:

In-memory Map for development/demo (line 18 in src/index.ts)
Production deployments should replace with proper database

MCP Capabilities

Tools (5 available):

create_todo - Create todos with validation via Zod schemas
list_todos - List/filter todos by status, priority, tags with sorting
update_todo - Update any todo field with partial updates
delete_todo - Remove todos by ID
todo_stats - Generate comprehensive statistics and analytics

Resources (2 available):

todos://json - Complete todo dataset as structured JSON
todos://summary - Quick summary with metrics and completion rates

Read the full file on GitHub · 107 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.

8d ago First seen · 107 lines · 812 tokens per session scan A 5e24a4f55009

Subscribe to this mod's changes

poc_todo_mcp_server CLAUDE.md is an instructions file published in the GitHub repository cateland/poc_todo_mcp_server (0 stars, last pushed 1y ago), licensed MIT. It adds 812 tokens to every session, about $0.0041 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 2026-08-31.

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poc_todo_mcp_server: Instructions file for Claude Code