How do I install a skill on Codex?

Run codex skill add in your project root. Codex pulls the SKILL.md plus supporting files into the local skills directory and loads them on next session.

Skills for OpenAI Codex — SKILL.md catalog

Q: What is OpenAI Codex?

Codex is OpenAI's terminal-native coding agent. It adopts the open SKILL.md format for reusable agent behaviours via codex skill add.

Q: Do Claude Code skills work on Codex?

Mostly yes — both clients implement the SKILL.md open standard. Skills using Claude-specific tools may need minor adaptation.

Skills for OpenAI Codex

85,000+ SKILL.md files compatible with OpenAI Codex. Install with one CLI command; Codex loads them via progressive disclosure. Free to browse. Pro unlocks the multi-signal Quality Score.

codex skill add <owner/repo>

What is OpenAI Codex?

Codex is OpenAI's terminal-native coding agent — a CLI tool that reads your codebase, plans changes, and executes them with your approval. Codex adopts the open SKILL.md format documented at developers.openai.com/codex/skills/.

How to install a skill on Codex

Find a skill in the catalog or filter by your use case.
Run codex skill add <owner/repo> in your terminal.
Codex pulls the SKILL.md plus supporting files into the local skills directory.
The skill loads via progressive disclosure on next session — name and description at discovery, full SKILL.md when a task matches.
Multiple skills can be installed; Codex picks the right one by intent matching.

Compatibility notes

Codex's SKILL.md implementation is aligned with agentskills.io. Skills written for Claude Code, Cursor, Hermes, or other compatible clients generally work on Codex without modification. Caveats:

Skills with paths like ~/.claude/ should be adapted to Codex's config directory.
Skills referencing Claude-specific tools (Computer Use, particular MCP servers) may need adapter shims.
Codex's terminal-only execution model means UI-heavy skills don't apply.

Codex skills, answered

What is OpenAI Codex?

OpenAI's terminal-native coding agent. CLI tool, reads codebases, plans + executes changes with approval. SKILL.md support per developers.openai.com/codex/skills/.

Do Claude Code skills work on Codex?

Mostly yes — both implement the SKILL.md open standard. Skills that don't use Claude-specific tools or paths work without modification.

How do I run codex skill add?

Install Codex CLI from github.com/openai/codex, authenticate, then codex skill add <owner/repo> for any skill in this catalog.

What is OpenAI Codex?

How to install a skill on Codex

Compatibility notes

Codex skills, answered