Codex CLI Installation

Learn how to install and configure Agent Skills for Codex CLI.

Prerequisites

• Codex CLI installed
• Node.js 18 or higher
• A Codex configuration file

Installation

Step 1: Add a Skill

codex config add-skill owner/skill-repo

Example:

codex config add-skill openai/code-review

Step 2: Verify Installation

codex config list-skills

Step 3: Use the Skill

The skill is now active in all Codex sessions.

Configuration

Manual Configuration

Edit your ~/.codex/config.json:

{
  "skills": [
    "https://github.com/owner/skill-repo"
  ]
}

Project-Specific Skills

Create a .codex/config.json in your project:

{
  "skills": [
    "https://github.com/owner/project-skill"
  ]
}

Updating Skills

codex config update-skills

Removing Skills

codex config remove-skill owner/skill-repo

Next Steps

• Quick Start - Get started with skills
• Create Skills - Build your own skills