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