Directory · Claude Code extensions

Anthropic Cybersecurity Skills

Library of 800+ cybersecurity skills in agentskills.io format for Claude Code and other agents, mapped to MITRE and NIST frameworks.

★ 34,396 stars · last updated 2026-08-31 · Free, open source · View on GitHub

Best for

• Security analysts using Claude Code for threat hunting, DFIR, or incident response
• Red teams and pentesters wanting structured workflows for authorized engagements
• Teams that need skills mapped to MITRE ATT&CK, NIST CSF 2.0, ATLAS, D3FEND, AI RMF, or F3
• Users of multiple agent platforms who want one portable skill set

Install

npx skills add mukul975/Anthropic-Cybersecurity-Skills

git clone https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git
cd Anthropic-Cybersecurity-Skills

Our take

Community project, not affiliated with Anthropic despite the name. It is actively maintained, covers 34 domains, and includes offensive and dual-use techniques intended for authorized testing only. The README also promotes a survey and the author's Casky.ai playground, and its skill counts vary slightly between sections (817 vs 818).

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