754 cybersecurity skills, handed to your agent
A repo called Anthropic-Cybersecurity-Skills climbed GitHub trending today, past seven thousand stars, and the name is a little misleading: it is not from Anthropic, it is one person, mukul975, who sat down and wrote 754 structured security skills for AI agents. Cloud security, threat hunting, malware analysis, incident response, penetration testing, twenty-six domains in all, every one of them packaged so an agent can actually run it.
The part that makes it more than a checklist is the structure. Each skill follows the agentskills.io format: a tiny thirty-token YAML header so an agent can scan all 754 of them without blowing up its context window, then a full markdown body with when to use it, prerequisites, the workflow, and a verification step. And every skill is mapped to the real frameworks security teams already live by, MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF. It runs anywhere agentskills.io works: Claude Code, Copilot, Cursor, Codex CLI, Gemini CLI, twenty-plus others. Apache 2.0.
Here is why I think this one matters beyond the star count. Skills started as a cute community hobby, a karpathy CLAUDE.md here, an awesome-list there. This is the moment they go vertical and professional. One motivated person can now encode an entire profession's playbook, mapped to the exact compliance frameworks an auditor checks, and drop it into every major agent at once. That is the real promise of skills: not making the agent smarter, but pouring a domain expert's procedures straight into its hands. Repo at github.com/mukul975/Anthropic-Cybersecurity-Skills.
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The part that makes it more than a checklist is the structure. Each skill follows the agentskills.io format: a tiny thirty-token YAML header so an agent can scan all 754 of them without blowing up its context window, then a full markdown body with when to use it, prerequisites, the workflow, and a verification step. And every skill is mapped to the real frameworks security teams already live by, MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF. It runs anywhere agentskills.io works: Claude Code, Copilot, Cursor, Codex CLI, Gemini CLI, twenty-plus others. Apache 2.0.
Here is why I think this one matters beyond the star count. Skills started as a cute community hobby, a karpathy CLAUDE.md here, an awesome-list there. This is the moment they go vertical and professional. One motivated person can now encode an entire profession's playbook, mapped to the exact compliance frameworks an auditor checks, and drop it into every major agent at once. That is the real promise of skills: not making the agent smarter, but pouring a domain expert's procedures straight into its hands. Repo at github.com/mukul975/Anthropic-Cybersecurity-Skills.
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