Anthropic Cybersecurity Skills: 754 AI Agent Security Skills Mapped to 5 MITRE & NIST Frameworks

This open-source repository provides the largest library of structured cybersecurity skills for AI agents, containing 754 production-grade skills across 26 security domains. Each skill is mapped to six industry frameworks—MITRE ATT&CK v19.1, NIST CSF 2.0, MITRE ATLAS, MITRE D3FEND, NIST AI RMF, and the MITRE Fight Fraud Framework (F3)—making it a unique cross-framework knowledge base. Built on the agentskills.io standard, these skills encode real practitioner workflows, enabling AI agents like Claude Code, GitHub Copilot, and Cursor to perform expert-level tasks such as threat hunting, malware analysis, and incident response by following step-by-step procedures. The library is designed for progressive disclosure, allowing agents to search all skills efficiently and load detailed guidance as needed. It is a community project, Apache 2.0 licensed, and actively maintained with contributions welcome. 

https://github.com/mukul975/Anthropic-Cybersecurity-Skills

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