TL;DR
A skill catalog repository that packages instructions and scripts so that OpenAI Codex agents can repeatedly perform specific tasks.
Key features
Skill folders consist of instructions, scripts, and resources that agents can discover and use.
Skills in the .system folder are automatically installed in Codex; .curated and .experimental skills can be installed via the $skill-installer command.
Licenses for each skill are specified in the LICENSE.txt file within each directory.
When to use it
When you want Codex agents to perform repetitive tasks (e.g., commenting on GitHub issues, generating plans).
Useful for teams or individuals to share and reuse skills to perform specific tasks in a reproducible manner.