openai/skills ? reverse-engineered prompt

I want to build a catalog of "skills" for an AI agent. The idea is that these skills are just self-contained folders with instructions, scripts, and other resources that help an agent perform a specific task. It's like a library of reusable abilities that you can "write once, use everywhere."

The project should be a central repository where these skills are stored and organized. It would be great to have a few categories for them, like "system" for core skills, "curated" for high-quality ones, and "experimental" for new ideas. I also need a simple way for a user to install a skill from the catalog into their agent, maybe a command-line tool that lets them install by name. The main repo should have a simple structure, with a single top-level skills/ directory containing all the skill folders.