A curated index of open-source Agent Skills. Every entry shows its source repo, star count and license — and links straight back to the original.
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Highest-starred source repositories
Use when implementing any feature or bugfix, before writing implementation code
Use when starting any conversation - establishes how to find and use skills, requiring skill invocation before ANY response including clarifying questions
Use when creating new skills, editing existing skills, or verifying skills work before deployment
Use when you have a spec or requirements for a multi-step task, before touching code
Use when completing tasks, implementing major features, or before merging to verify work meets requirements
You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design…
The basics of Agent Skills
An Agent Skill is a folder containing a SKILL.md instruction file, plus optional scripts and resources. AI coding tools load it on demand to gain a specific, repeatable capability — generating a Word document, running an SEO audit, reviewing code. Skills are plain files: no installer, no runtime dependency.
SKILL.md is the core file of an Agent Skill and follows an open standard (agentskills.io). YAML frontmatter declares the skill's name and description; the body describes in plain language how to perform the task. Because it is plain Markdown, any compatible AI tool can read it.
SKILL.md is an open standard adopted by 20+ tools, including Claude Code, Cursor, Codex CLI and Gemini CLI. The same skill usually works across tools without modification.
Drop the skill folder into your tool's skills directory — for Claude Code that is ~/.claude/skills/. The tool picks it up automatically. There is nothing to install and no runtime dependency.
Yes. Every skill indexed on theskillmd.com is open source on GitHub and free to use. This site only indexes metadata and links back to the source repository; it does not host skill contents. Always check the licence in the source repository before commercial use.
12,856 SKILL.md skills across 22 industries. The largest categories are software engineering, productivity, writing, AI agents and security. Every entry records its source repository, GitHub star count and licence status.