Borrowing it
Nothing to install: this file belongs to megumish/jj-skill. 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/megumish/jj-skill/main/CLAUDE.mdgit clone --depth 1 https://github.com/megumish/jj-skillWrote 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/megumish/jj-skill/claude-md)<a href="https://agentmods.dev/instructions/megumish/jj-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/megumish/jj-skill/claude-md.svg" alt="Measured on agentmods" 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 | $0.00383 | $0.00383 |
| Opus 5 | $0.00192 | $0.00192 |
| Sonnet 5 | $0.00077 | $0.00077 |
| Haiku 4.5 | $0.00038 | $0.00038 |
Grade A, and why
jj-skill 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 6d 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.
This is a copy
86% identical to jj-skill AGENTS.md — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
This is an Agent Skill for jujutsu (jj) version control. It teaches AI coding agents to use jj instead of git. The skill follows the Agent Skills open standard and can be installed in Claude Code, Cursor, Gemini CLI, GitHub Copilot, and Windsurf.
Version Control
This repository uses jj (jujutsu), not git. Never use raw git commands — use the /jj skill for all version control operations. Minimum supported jj version: 0.41.0 (see .min-jj-version).
Repository Structure
skills/jj/
├── SKILL.md # Main skill definition (frontmatter + instructions)
└── references/
└── command-reference.md # Full jj command reference
SKILL.md— Contains YAML frontmatter (name, description, trigger conditions) followed by the skill content: git-to-jj mapping, core workflows, push operations, and troubleshootingreferences/command-reference.md— Detailed command reference covering workspaces, bookmarks, conflict resolution, undo/recovery, and advanced operations.min-jj-version— Single-line file specifying the minimum jj version this skill supports
Development Notes
- There is no build system, linter, or test suite — the project consists entirely of Markdown documentation files
- When editing skill content, preserve the YAML frontmatter format in
SKILL.md(the---delimited block at the top) - The
descriptionfield in SKILL.md frontmatter determines when AI agents activate this skill — keep it accurate and comprehensive
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.
- 6d ago First seen · 31 lines · 383 tokens per session scan A 923409c7ce45
jj-skill CLAUDE.md is an instructions file published in the GitHub repository megumish/jj-skill (5 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 383 tokens to every session, about $0.0019 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to jj-skill AGENTS.md, differing in 6 lines, and is treated as a copy.
Other instructions, from other repositories
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
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.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.