What is OpenAI Skills Catalog?

OpenAI Skills is the official Skills Catalog for Codex, implementing the Agent Skills open standard — a framework for packaging reusable capabilities that AI agents can discover and execute. The core principle is simple: write a skill once, use it everywhere. Skills are self-contained packages containing instructions, scripts, and resources that enable agents to perform specific tasks in a consistent, repeatable manner.

Skill Tier System

The catalog is organized into three tiers designed for different deployment scenarios:

Installation and Usage

Installing a curated skill is as simple as invoking the skill-installer tool within Codex by name — no manual configuration, no dependency management, no restarts required for curated skills. The multi-language codebase (Python 77%, JavaScript 15%, Shell 3%) supports a wide variety of skill types, from data processing to code review to deployment automation.

Why Agent Skills Matter in 2026

As Codex becomes a standard tool in developer workflows, the Skills Catalog enables a composable, modular approach to AI-powered development. Instead of each team reinventing common capabilities, skills can be shared across organizations — similar to how npm packages work for JavaScript. With 17.4k stars since launching in November 2025, the Skills Catalog has quickly become a central hub for the Codex developer ecosystem.