Kungfu is a work-continuity system that lets the same task move between coding agents such as Codex, Claude, and OpenCode without losing its context or progress. It is for people coordinating different agents across attempts, reviews, failures, and recoveries, while the catalogue skills and instructions define agent workflows around that shared work.
Borrowing it
Nothing to install: this file belongs to kungfu-systems/kungfu. 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/kungfu-systems/kungfu/dev/v4/v4.0/CLAUDE.mdgit clone --depth 1 https://github.com/kungfu-systems/kungfuWrote 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/kungfu-systems/kungfu/claude-md)<a href="https://agentmods.dev/instructions/kungfu-systems/kungfu/claude-md"><img src="https://agentmods.dev/badge/instructions/kungfu-systems/kungfu/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/kungfu-systems/kungfu/claude-md"><img src="https://agentmods.dev/badge/instructions/kungfu-systems/kungfu/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 | $0.00054 | $0.00054 |
| Opus 5 | $0.00027 | $0.00027 |
| Sonnet 5 | $0.00011 | $0.00011 |
| Haiku 4.5 | $0.00005 | $0.00005 |
Grade A, and why
kungfu 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 9d 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.
What it actually says
Claude repository entry
Read and follow AGENTS.md before working in this repository. It
routes both product use and contribution work to the repository sources of
truth, including the requirement that development and build tasks enter through
Shifu.
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.
- 9d ago First seen · 7 lines · 54 tokens per session scan A a5727d598521
kungfu CLAUDE.md is an instructions file published in the GitHub repository kungfu-systems/kungfu (4,514 stars, last pushed yesterday), licensed Apache-2.0. It adds 54 tokens to every session, about $0.0003 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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