Borrowing it
Nothing to install: this file belongs to FireFightLabs/firefight. 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/FireFightLabs/firefight/main/CLAUDE.mdgit clone --depth 1 https://github.com/FireFightLabs/firefightWrote 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/firefightlabs/firefight/claude-md)<a href="https://agentmods.dev/instructions/firefightlabs/firefight/claude-md"><img src="https://agentmods.dev/badge/instructions/firefightlabs/firefight/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/firefightlabs/firefight/claude-md"><img src="https://agentmods.dev/badge/instructions/firefightlabs/firefight/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 | $0.06048 | $0.06048 |
| Opus 5.5 | $0.02419 | $0.02419 |
| Sonnet 5.5 | $0.01210 | $0.01210 |
| Haiku 4.5 | $0.00605 | $0.00605 |
Grade A, and why
firefight 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 today.
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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- today Changed · +60 tokens per session 5298ed1e6db1
- 19d ago Changed · +7 lines · +221 tokens per session 0de8906ffde5
- 20d ago Changed · +2 lines · +379 tokens per session b4995c12de8a
- 22d ago Changed · +1 lines · +122 tokens per session 115ebbc02bbf
- 26d ago Changed · +2 lines · +241 tokens per session c35ef2614d3c
- 1mo ago Changed · +2 lines · +160 tokens per session e31437b63129
- 1mo ago Changed · +26 tokens per session 744e4ef495aa
- 1mo ago Changed · +53 tokens per session c4ab73c59f2e
- 1mo ago Changed · +62 tokens per session fd486fc59eb4
- 1mo ago First seen · 156 lines · 4,724 tokens per session scan A 7d9ab9ddf89d
firefight CLAUDE.md is an instructions file published in the GitHub repository FireFightLabs/firefight (10 stars, last pushed today), licensed AGPL-3.0. It adds 6,048 tokens to every session, about $0.0242 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 2026-08-31.
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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.