Agent Skills, Instructions, Custom Prompts, etc.

Agent Skills — The closest thing we have to an industry standard for defining agent skills.

The Agent Skills Directory (skills.sh) is the primary public registry for discoverable, installable skills. Skills listed there can be installed into any project via npx skillsadd <owner/repo> and referenced via their raw URLs.

Caveman – An excellent example of a shareable skill, including installation scripts for multiple agents.