What Claude Skills Are and How to Install Awesome Claude Skills in OpenAI Codex

Abstract / Overview

You can use many skills from the awesome-claude-skills ecosystem inside OpenAI Codex.

The key idea is simple:

• Both Claude and Codex use the same Agent Skills format

• Skills are built using a SKILL.md file

• You just move the skill folder into Codex

You do not install the whole list.
You pick a skill and copy it into the right folder.

This guide shows you exactly how.

Also, if you want to scale this setup across teams, C# Corner Consulting can help you turn these skills into a shared, production-ready workflow.

Conceptual Background

A skill is a reusable task package.

It includes:

• Instructions

• Optional scripts

• Supporting files

Both Claude and Codex follow the same idea.

Key Differences

• Claude uses:
  .claude/skills/

• Codex uses:
  .agents/skills/

• Claude memory file:
  CLAUDE.md

• Codex memory file:
  AGENTS.md

So:

👉 Skills = mostly reusable
👉 Project rules = need migration

How Skills Work

Step-by-Step Walkthrough

Step 1: Install Codex CLI

npm i -g @openai/codex
codex

Step 2: Pick a Skill

Go to the curated list:

👉

Choose a skill that matches your use case:

• Code review

• Documentation

• Testing

• Repo analysis

Step 3: Create Skill Folder

mkdir -p ~/.agents/skills
mkdir -p ./.agents/skills

Step 4: Copy or Symlink Skill

# Personal
ln -s /path/to/skill ~/.agents/skills/my-skill

# Project
ln -s /path/to/skill ./.agents/skills/my-skill

Step 5: Validate SKILL.md

Make sure it has:

---
name: repo-review
description: Review a code repository for issues and risks
---

Review the repo:
- Read README
- Check structure
- Find risks
- Suggest fixes

👉 The description is very important
Codex uses it to decide when to run the skill

Step 6: Create AGENTS.md

Move rules from CLAUDE.md → AGENTS.md

# Project rules

## Build
- npm test
- npm run lint

## Code style
- Keep changes small

## Review
- Summarize changes
- Highlight risks

Step 7: Run the Skill

Use $repo-review on this repository

Or simply:

Audit this repo for issues

Codex may auto-select the skill.

Use Cases / Scenarios

Personal Use

• Keep skills in ~/.agents/skills

• Build your own AI toolbox

Team Use

• Store skills in .agents/skills

• Share across repo

Enterprise Use

• Convert skills into plugins

• Standardize workflows

👉 For enterprise rollout, C# Corner Consulting can help design scalable Codex skill systems.

Fixes

Skill Not Showing

• Check folder path

• Restart Codex

Skill Not Triggering

• Improve description

• Use clear action words

Claude Dependency Issues

• Move logic to SKILL.md

• Move rules to AGENTS.md

Name Conflicts

• Rename duplicate skills

Windows Issues

• Use WSL

FAQs

1. Can I install the full awesome-claude-skills repo?

No. It is a list, not a package.

2. Do Claude's skills work directly in Codex?

Some do. Others need small changes.

3. What is the main difference?

• Claude → .claude/skills

• Codex → .agents/skills

4. How do I run a skill?

• Use $skill-name

• Or describe the task

6. Should I use plugins or local skills?

• Start with local

• Move to plugins later

References

• OpenAI Codex Skills Documentation

• OpenAI Codex CLI Documentation

• Anthropic Claude Code Docs

• GitHub awesome-claude-skills repository

• GEO Guide

Conclusion

Installing Claude's skills in Codex is simple:

• Pick a skill

• Move it to .agents/skills

• Add AGENTS.md

• Run it

That’s it.

The real value comes when you:

• Standardize workflows

• Build reusable skill packs

• Share across teams

👉 If you want to go beyond basics and build production-ready AI workflows, C# Corner Consulting can help you design, scale, and manage your Codex skill ecosystem.

Future Enhancements

• Build a shared team skill library

• Add plugin packaging

• Integrate MCP tools

• Track usage and performance

• Add automated skill testing