Borrowing it
Nothing to install: this file belongs to Masriyan/Claude-Code-CyberSecurity-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/Masriyan/Claude-Code-CyberSecurity-Skill/main/CLAUDE.mdgit clone --depth 1 https://github.com/Masriyan/Claude-Code-CyberSecurity-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/masriyan/claude-code-cybersecurity-skill/claude-md)<a href="https://agentmods.dev/instructions/masriyan/claude-code-cybersecurity-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/masriyan/claude-code-cybersecurity-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 | $0.01124 | $0.01124 |
| Opus 5 | $0.00562 | $0.00562 |
| Sonnet 5 | $0.00225 | $0.00225 |
| Haiku 4.5 | $0.00112 | $0.00112 |
Grade A, and why
Claude-Code-CyberSecurity-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 yesterday.
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 — 88 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.
What this repository is
This is a content repository, not an application. It publishes a Claude Code plugin — a collection of 20 SKILL.md files (in skills/<NN-skill-name>/) that teach Claude domain-specific cybersecurity methodology (recon, vuln scanning, exploit dev, RE, malware analysis, threat hunting, IR, network/web/cloud security, SOC automation, log analysis, crypto, red/blue team ops, AI/LLM security, mobile, OT/ICS, GRC, supply chain security). Each skill directory optionally ships standalone Python automation scripts and example usage docs that the SKILL.md references.
There is no app to build, no test suite, and no CI pipeline defined in this repo — "development" here means writing/editing Markdown skill files and the Python scripts they call out to.
Commands
Scripts are standalone (no shared package, no requirements.txt at repo root — each script declares its own imports and degrades gracefully if optional deps are missing).
# Syntax-check a script after editing it
python3 -m py_compile skills/<NN-skill-name>/scripts/<tool>.py
# Confirm --help works (argparse is required for every script)
python3 skills/<NN-skill-name>/scripts/<tool>.py --help
# If the script has a --demo flag, run it as a smoke test
python3 skills/<NN-skill-name>/scripts/<tool>.py --demo
# If a script writes --output <file>.json, validate the JSON
python3 -c "import json; json.load(open('/tmp/test.json'))"
There is no linter or test runner configured — py_compile + --help + manual JSON validation (above) is the full verification loop used in this repo (see CONTRIBUTING.md).
Repository structure
skills/<NN-skill-name>/
├── SKILL.md # required — the instructions Claude reads; drives activation
├── scripts/<tool>.py # optional — automation the SKILL.md's Script Integration section calls
└── examples/, resources/ # optional — only when they add value beyond SKILL.md itself
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.
- yesterday First seen · 88 lines · 1,124 tokens per session scan A 7cf74208a30d
Claude-Code-CyberSecurity-Skill CLAUDE.md is an instructions file published in the GitHub repository Masriyan/Claude-Code-CyberSecurity-Skill (397 stars, last pushed 3d ago), licensed MIT. It adds 1,124 tokens to every session, about $0.0056 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 2026-09-05.
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