Borrowing it
Nothing to install: this file belongs to doug/jjj. 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/doug/jjj/main/CLAUDE.mdgit clone --depth 1 https://github.com/doug/jjjWrote 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/doug/jjj/claude-md)<a href="https://agentmods.dev/instructions/doug/jjj/claude-md"><img src="https://agentmods.dev/badge/instructions/doug/jjj/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/doug/jjj/claude-md"><img src="https://agentmods.dev/badge/instructions/doug/jjj/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 | $0.02724 | $0.02724 |
| Opus 5.5 | $0.01090 | $0.01090 |
| Sonnet 5.5 | $0.00545 | $0.00545 |
| Haiku 4.5 | $0.00272 | $0.00272 |
Grade A, and why
jjj 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.
How it starts
The opening of the file, as written. The whole thing — 205 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
jjj (Jujutsu Juggler) is a distributed project management and code review system built for Jujutsu (jj). It implements Popperian epistemology (Problems → Solutions → Critiques) as a Kanban-style workflow with no central server, no database, and offline-first operation.
Key insight: jj's stable Change IDs persist across rebases/squashes, allowing metadata to survive history rewrites that would orphan Git commit-based metadata.
Build Commands
Rust CLI
cargo build # Debug build
cargo build --release # Release build
cargo test # Run all tests
cargo test <test_name> # Run specific test
cargo run -- <command> # Execute jjj command
cargo fmt # Format code
cargo clippy # Lint
VS Code Extension
cd vscode
npm install
npm run compile # TypeScript compilation
npm run watch # Watch mode
npm run test # Run mocha tests
npm run lint # ESLint
npm run package # Create .vsix
npm run install-ext # Install locally
Documentation
cd docs-site && npm run dev # Serve locally
cd docs-site && npm run build # Build docs
Architecture
Core Model
- Problems: Things to solve (can form DAG via parent_id). Support tags for categorization.
- Solutions: Conjectures attached to jj Change IDs (not commit hashes). Support tags for categorization.
- Critiques: Error-elimination feedback that blocks solution approval
- Findings: Evidence measured about a problem. No approval state — a measurement is cited or superseded, never accepted. Solutions and critiques cite findings via
--cites. - Milestones: Time-based goals grouping problems
Storage: Shadow Graph
All metadata lives in an orphaned jjj bookmark, never touching the working copy. Sync via jj git push -b jjj.
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 Changed · +1 lines · +22 tokens per session f6087e4a6a5f
- 13d ago Changed · +4 lines · +79 tokens per session dff589348fdc
- 1mo ago Changed · +2 lines · +32 tokens per session 994cc6c62ef4
- 1mo ago Changed · +17 lines · +261 tokens per session a96165a332d6
- 1mo ago Changed · +10 lines · +197 tokens per session d2dc1d626cce
- 2mo ago First seen · 171 lines · 2,133 tokens per session scan A 5d28795ad259
jjj CLAUDE.md is an instructions file published in the GitHub repository doug/jjj (13 stars, last pushed 7d ago), licensed Apache-2.0. It adds 2,724 tokens to every session, about $0.0109 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).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.