What are agent skills?
Agent skills are reusable instruction packages (SKILL.md files) that extend AI coding agents like Claude Code, OpenAI Codex, and Cursor with specialized capabilities. They give agents domain expertise in specific tools, frameworks, and workflows.
How do I install a Claude Code skill?
Run npx skills add author/repo-name in your terminal. This automatically downloads and configures the skill for your agent. Skills install in seconds and work immediately in your next session.
Are these skills free to use?
Yes. All skills in the directory are open source and free to use. They are hosted on GitHub and licensed by their respective authors.
What is SKILL.md?
SKILL.md is the standard format for agent skills. It is a Markdown file containing structured instructions, context, and examples that teach an AI agent how to perform a specific task. Claude Code, Codex, and Cursor all support SKILL.md.
What is the difference between Claude Code, Codex, and Cursor skills?
All three platforms support SKILL.md files. Claude Code skills are optimized for Anthropic's coding agent. Codex skills target OpenAI's Codex CLI. Cursor skills (.cursorrules) configure the Cursor IDE's AI assistant. Many skills work across all three platforms.