claude-plugin-jj: Instructions file for Claude Code

CLAUDE.md

claude-plugin-jj CLAUDE.md is an instructions file for Claude Code from kawaz/claude-plugin-jj. It costs 648 tokens per session, scanned A, original, MIT.

A plugin that helps coding agents use Jujutsu, a version-control system similar to Git, and prevents accidental Git commands in Jujutsu-managed repositories. It includes a command guard, a basic guide, and an expert agent for advanced operations.

In plain words
What is it for?
Use it to block most Git commands, map Git tasks to Jujutsu, handle advanced revision and file-set queries, work with GitHub pull requests, and manage Jujutsu repositories from an AI agent.
Why use it?
It reduces the risk of mixing Git commands into a Jujutsu workflow and gives the agent references for choosing the corresponding Jujutsu commands. It also covers non-interactive ways to perform tasks that require a terminal interface.

Instructions file for Claude Code

Written for Claude Code: PreToolUse hook event. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is kawaz/claude-plugin-jj's own configuration. It tells Claude Code how to work on claude-plugin-jj itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-plugin-jj configures →

Reuse

Borrowing it

Nothing to install: this file belongs to kawaz/claude-plugin-jj. 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/kawaz/claude-plugin-jj/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/kawaz/claude-plugin-jj

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.

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README.md
[![agentmods](https://agentmods.dev/badge/instructions/kawaz/claude-plugin-jj/claude-md.svg)](https://agentmods.dev/instructions/kawaz/claude-plugin-jj/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/kawaz/claude-plugin-jj/claude-md"><img src="https://agentmods.dev/badge/instructions/kawaz/claude-plugin-jj/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 648 This file is loaded in full into every session.
When invoked 648 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00648 $0.00648
Opus 5 $0.00324 $0.00324
Sonnet 5 $0.00130 $0.00130
Haiku 4.5 $0.00065 $0.00065

Measured 7d ago against content hash 5b2c039b73bc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

claude-plugin-jj 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 7d 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 · 36 lines

What it actually says

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

プロジェクト概要

Claude Code用プラグイン。jj (Jujutsu VCS) 管理下のリポジトリでgit誤使用を防止し、jjの知識を提供する。

インストール: claude plugin marketplace add kawaz/claude-plugin-jj && claude plugin install jj@claude-plugin-jj

アーキテクチャ(3層構成)

ファイル 役割
Hook (jj-guard) hooks/hooks.json + hooks/jj-guard.sh PreToolUseフックでBash内のgit コマンドをブロック
Skill (jj-guide) skills/jj-guide/SKILL.md 基本操作リファレンス(Git→jjマッピング等)
Agent (jj-expert) agents/jj-expert.md 高度なrevset/fileset/template、GitHub PR連携等

設計原則: 3コンポーネントは1プラグインとしてバンドルされるため、相互の存在を前提にできる。hookのdenyメッセージはskillへ誘導するだけ、skillは基本に絞りagentへ委譲、agentは高度な内容に専念。情報を重複させない。

重要な設計判断

  • エスケープハッチ :;git: guardはgit で始まるコマンドのみブロック。:;git(no-op : + ;git)で意図的にバイパス可能。git submodule/lfs等のgit専用操作のため。
  • 非インタラクティブ操作: AI agentは-iフラグ(TUI)を使えないため、agentにはfileset指定による非インタラクティブ代替を網羅。
  • agentのモデル: jj-expertはsonnet指定(参照検索・コマンド構築が主目的のためコスト最適化)。

ビルド・テスト

ビルドシステム・テスト・CIは無い。全ファイルが宣言的(shell script, JSON, Markdown)。

開発時の注意

  • plugin.jsonにプラグインメタ情報(name, version)がある。hook/skill/agentの内容を変更したら必ずpatch versionを上げること。
  • hookの動作条件: カレントディレクトリに.jjが存在 かつ コマンドがgit で始まる場合にdeny。
  • guardスクリプトはjqに依存(stdinからJSON解析)。
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.

  1. 7d ago First seen · 36 lines · 648 tokens per session scan A 5b2c039b73bc

Subscribe to this mod's changes

claude-plugin-jj CLAUDE.md is an instructions file published in the GitHub repository kawaz/claude-plugin-jj (6 stars, last pushed 4mo ago), licensed MIT. It adds 648 tokens to every session, about $0.0032 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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