If you're building skills for Claude Code, this is meta but practical. It walks you through the structure and purpose of skills themselves: how they work as modular onboarding guides, what makes them effective, and how to package specialized workflows, tool integrations, and domain expertise. Originally from the official anthropics/claude-code repository and maintained by davila7, it's essentially documentation turned into a skill. Use it when you're creating your own skills and need a reference for best practices and anatomy. It won't write skills for you, but it gives Claude the context to help you structure them properly.
npx skills add https://github.com/davila7/claude-code-templates --skill skill-development