* Fission-AI/OpenSpec: Spec-driven development (SDD) for AI coding assistants.
https://github.com/Fission-AI/OpenSpec
* obra/superpowers: An agentic skills framework & software development methodology that works.
https://github.com/obra/superpowers
* mattpocock/skills: My personal directory of skills, straight from my .claude directory.
https://github.com/mattpocock/