Spec Kit
GitHub's spec-driven development toolkit. Open source (MIT), free to use.
How to use it
Install it with the open Skills CLI (needs Node.js), then restart your agent:
npx skills add github/spec-kit- Download the ZIP from this page and unzip it.
- Put the
github-spec-kitfolder in.claude/skills/inside your project (or~/.claude/skills/for all projects). - Restart Claude Code and call it with
/github-spec-kit.
More for agent skills
- gstack: Garry Tan's opinionated Claude Code setup (23 tools). Open source (MIT), free to use.
- Addy Osmani Agent Skills: Production-grade engineering skills for coding agents. Open source (MIT), free to use.
- BMAD METHOD: Agile AI-driven development method (agents + workflows). Open source (MIT), free to use.