Borrowing it
Nothing to install: this file belongs to toolprint/just-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/toolprint/just-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/toolprint/just-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/toolprint/just-mcp/claude-md)<a href="https://agentmods.dev/instructions/toolprint/just-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/toolprint/just-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/toolprint/just-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/toolprint/just-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 | $0.03858 | $0.03858 |
| Opus 5.5 | $0.01543 | $0.01543 |
| Sonnet 5.5 | $0.00772 | $0.00772 |
| Haiku 4.5 | $0.00386 | $0.00386 |
Grade A, and why
just-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 1mo 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 — 484 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
just-mcp is a Model Context Protocol (MCP) server that transforms justfiles into AI-accessible automation tools. It monitors directories for justfiles, parses them, and exposes their tasks as MCP tools that AI assistants can discover and execute.
Essential Development Commands
The justfile has been refactored into a modular system with specialized modules. Use these unified commands:
# Quick Start & Setup
just quickstart # Complete setup for new developers
just dev-setup # Comprehensive development environment setup
just help # Comprehensive help system with discovery features
# Core Development Workflow
just build [mode] # Build project (debug/release)
just test [coverage] # Run tests (with optional coverage)
just format [target] # Format code (rust/json/markdown/all)
just lint [target] [fix] # Lint code with optional auto-fix
just check [target] # Combined format + lint + test (quick/full/all)
just pre-commit # Full validation before committing
# Workflow Automation
just workflow quick # Quick development workflow (format + lint + test)
just workflow full # Full workflow with coverage and release build
just workflow commit # Commit-ready workflow (runs pre-commit)
just ci # Complete CI/CD checks locally
# Installation & Release
just install [features] # Install binaries (with optional vector-search)
just release-info # Show release binary information
just clean # Clean build artifacts
# Discovery & Navigation
just list # List all recipes organized by groups
just groups # List all recipe groups
just summary # Compact recipe list
just help-topics # Show all available help topics
Modular Justfile Architecture
The justfile has been transformed from a monolithic 870-line file into a modular system:
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.
- 1mo ago First seen · 484 lines · 3,858 tokens per session scan A 2165156029ef
just-mcp CLAUDE.md is an instructions file published in the GitHub repository toolprint/just-mcp (46 stars, last pushed 1y ago), licensed MIT. It adds 3,858 tokens to every session, about $0.0154 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 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.