What is scratchpad-mcp CLAUDE.md?

Project instructions for scratchpad-mcp, a TypeScript and Node.js server that provides shared scratchpad storage for coding-agent sub-agents. It uses SQLite, a local database, with full-text search.

Use them to install, run, test, type-check, lint, format, and build the scratchpad-mcp server.

They explain the project's purpose, setup, development commands, testing, validation, and build process in one place.

How pc035860/scratchpad-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to pc035860/scratchpad-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.

Copy the file

curl -O https://raw.githubusercontent.com/pc035860/scratchpad-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/pc035860/scratchpad-mcp

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

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Your own site

<a href="https://agentmods.dev/instructions/pc035860/scratchpad-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/pc035860/scratchpad-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.

Your own site · 80×15

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Per session 1,231 This file is loaded in full into every session.

When invoked 1,231 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	$0.01231	$0.01231
Opus 5.5	$0.00492	$0.00492
Sonnet 5.5	$0.00246	$0.00246
Haiku 4.5	$0.00123	$0.00123

Measured 2mo ago against content hash 51ac8f92711d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

scratchpad-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.

CLAUDE.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 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 this repository.

Project Overview

Name: scratchpad-mcp-v2 - use this for the graph-memory system.

Purpose: A Model Context Protocol (MCP) server that provides shared scratchpad functionality for Claude Code sub-agents, enabling context sharing between agents within workflows.

Status: ~95% complete - core functionality implemented including AI analysis features, comprehensive testing suite added, validation phase completed.

Tech Stack: TypeScript + Node.js 18+, SQLite with FTS5, MCP SDK, ESM modules

Quick Start

First-time Setup

# Install and verify
npm install && npm test && npm run build

# Development with hot reload
npm run dev

Running as MCP Server

# Development mode
npm run dev

# Production mode
npm run build && ./dist/server.js

Common Commands

Development Workflow

# Start development
npm run dev                    # Hot reload development

# Code quality checks
npm run typecheck             # TypeScript validation
npm run lint                  # ESLint checking
npm run format                # Prettier formatting

# Testing
npm test                      # Run all tests
npm run test:watch           # Watch mode testing
npm test -- tests/database.test.ts  # Specific test file

Build and Deploy

npm run build                 # Build to dist/
npm run clean                 # Clean build artifacts
./dist/server.js             # Run built MCP server

Web Viewer

npm run serve                 # Start workflow web viewer (port 3000)
npm run serve:dev            # Development mode with custom port

Architecture & Key Components

Core Structure

src/
├── server.ts                 # MCP server entry point
├── server-helpers.ts         # Parameter validation & error handling
├── database/
│   ├── ScratchpadDatabase.ts # Core database operations
│   ├── schema.ts            # SQLite schema + FTS5 setup
│   └── types.ts             # Database type definitions
├── tools/                   # 16 MCP tools for workflow management
│   ├── workflow.ts          # create-workflow
│   ├── scratchpad.ts        # create/get/append/chop/delete scratchpad
│   └── search.ts            # search scratchpads/scratchpad-content/workflows
└── scripts/                 # Utility tools and web viewer
    ├── serve-workflow/      # HTTP server for workflow browsing
    ├── check-search-mode.cjs # FTS5/LIKE mode checker
    ├── fix-database.cjs     # Database repair tool
    ├── migrate-to-wal.cjs   # WAL mode migration
    └── install-chinese-support.sh # Chinese tokenizer installer

Read the full file on GitHub · 163 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.

2mo ago First seen · 163 lines · 1,231 tokens per session scan A 51ac8f92711d

Subscribe to this mod's changes

scratchpad-mcp CLAUDE.md is an instructions file published in the GitHub repository pc035860/scratchpad-mcp (5 stars, last pushed 1y ago), licensed MIT. It adds 1,231 tokens to every session, about $0.0049 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.

Databases Memory and context

scratchpad-mcp CLAUDE.md next to 6 instructions from other repositories
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scratchpad-mcp: Instructions file for Claude Code