What is heptabase-mcp CLAUDE.md?

Development instructions for an MCP service that works with Heptabase backup data. Heptabase is a visual workspace for organising ideas on whiteboards and cards; the service lets AI assistants search, retrieve, analyse, and export that data.

Use it when developing or maintaining the Heptabase backup MCP service, including its tests, TypeScript build, type checks, and linting.

It gives contributors the project commands and structure needed to install, develop, test, build, and publish the service.

How LarryStanley/heptabase-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to LarryStanley/heptabase-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/LarryStanley/heptabase-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/LarryStanley/heptabase-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

[![agentmods](https://agentmods.dev/badge/instructions/larrystanley/heptabase-mcp/claude-md.svg)](https://agentmods.dev/instructions/larrystanley/heptabase-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/larrystanley/heptabase-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/larrystanley/heptabase-mcp/claude-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 954 This file is loaded in full into every session.

When invoked 954 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	$0.00954	$0.00954
Opus 5	$0.00477	$0.00477
Sonnet 5	$0.00191	$0.00191
Haiku 4.5	$0.00095	$0.00095

Measured 8d ago against content hash eb261e67a088, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

heptabase-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 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 · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 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) service for interacting with Heptabase backup data. The service enables AI assistants like Claude to search, retrieve, analyze, and export Heptabase whiteboards and cards through a standardized MCP interface.

Commands

# Install dependencies
npm install

# Development
npm run dev         # Run with ts-node for development
npm start          # Run compiled JavaScript

# Testing
npm test           # Run all tests
npm test:watch     # Run tests in watch mode
npm test:coverage  # Run tests with coverage
npm test:integration # Run integration tests

# Building and Linting
npm run build      # Compile TypeScript to JavaScript
npm run type-check # Type check without emitting
npm run lint       # Type check with tsc --noEmit

# Publishing
npm run prepublishOnly # Build and test before publish

Architecture

The project follows a layered architecture:

Entry Point (src/index.ts)
- Sets up environment variables
- Initializes and starts the MCP server
- Handles process signals
MCP Server (src/server.ts)
- Core MCP server implementation
- Registers tools with the MCP protocol
- Manages tool execution and error handling
Service Layer (src/services/)
- BackupManager: Manages backup files, ZIP extraction, file watching
- HeptabaseDataService: Handles JSON parsing, data queries, caching
Tools (src/tools/)
- MCP tool implementations organized by function:
  - Backup management
  - Search operations
  - Data retrieval
  - Export functionality
  - Analysis tools
Types (src/types/)
- TypeScript interfaces for Heptabase data models
- MCP protocol type definitions

Testing

The project uses Jest for testing:

Unit tests: Located in tests/unit/
Integration tests: Located in tests/integration/
Test fixtures: Located in tests/fixtures/

Read the full file on GitHub · 136 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 · 136 lines · 954 tokens per session scan A eb261e67a088

Subscribe to this mod's changes

heptabase-mcp CLAUDE.md is an instructions file published in the GitHub repository LarryStanley/heptabase-mcp (17 stars, last pushed 1y ago), licensed MIT. It adds 954 tokens to every session, about $0.0048 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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heptabase-mcp: Instructions file for Claude Code