# Agent Skills Standard — Cross-Platform AI Skills

> The shared Agent Skills format used by Claude Code, OpenAI Codex, and Gemini CLI. Write skills once, use across all major AI coding tools.

## Install

Save the content below to `.claude/skills/` or append to your `CLAUDE.md`:

## Quick Use

Create a skill in any compatible AI coding tool:
```
.claude/skills/my-skill/SKILL.md    # Claude Code
.codex/skills/my-skill/SKILL.md     # OpenAI Codex
.gemini/skills/my-skill/SKILL.md    # Gemini CLI
```

---

## Intro

Anthropic, OpenAI, and Google have converged on a shared Agent Skills standard defined at [agentskills.io](https://agentskills.io). Skills are folders with a SKILL.md file containing YAML frontmatter + markdown instructions. Write once, use across Claude Code, Codex CLI, and Gemini CLI.

**Works with**: Claude Code, GitHub Copilot, Gemini CLI, OpenAI Codex
---

## Skill Format

```markdown
---
name: my-skill
description: What this skill does
triggers:
  - pattern: "*.test.ts"
    description: Activate for test files
---

## Instructions

Your skill instructions here. The AI agent reads these
when the skill is activated.
```

## Compatible Tools

| Tool | Skills Directory | Stars |
|------|-----------------|-------|
| [Claude Code](https://tokrepo.com/en/workflows/f4d7c800-88c0-4961-90b7-fdd83574e80b) | `.claude/skills/` | 83,900+ |
| [OpenAI Codex](https://tokrepo.com/en/workflows/63156b9d-2358-477c-9a6f-212bb886bab8) | `.codex/skills/` | 68,200+ |
| [Gemini CLI](https://tokrepo.com/en/workflows/b9520bd2-46bb-442a-a26d-bbcf870b9981) | `.gemini/skills/` | 99,400+ |
| [GitHub Copilot](https://tokrepo.com/en/workflows/1e571d3c-6269-4037-afde-db332bdab08a) | `.github/skills/` | 27,500+ |

## Official Skill Repositories

- [Anthropic Skills](https://github.com/anthropics/skills) — 17 official skills (105k stars)
- [Claude Code Templates](https://tokrepo.com/en/workflows/1cf2f5bc-ce0e-4242-ab2f-34ad488b478e) — 600+ community skills
- [GitHub Awesome Copilot](https://github.com/github/awesome-copilot) — Copilot skills & plugins

---



### FAQ

**Q: What is Agent Skills Standard?**
A: The shared Agent Skills format used by Claude Code, OpenAI Codex, and Gemini CLI. Write skills once, use across all major AI coding tools.

**Q: How do I install Agent Skills Standard?**
A: Check the Quick Use section above for step-by-step installation instructions. Most assets can be set up in under 2 minutes.

## Source & Thanks

**Standard**: [agentskills.io](https://agentskills.io)
**Anthropic**: [anthropics/skills](https://github.com/anthropics/skills)
**OpenAI**: [openai/codex](https://github.com/openai/codex)
**Google**: [google-gemini/gemini-cli](https://github.com/google-gemini/gemini-cli)

---
Source: https://tokrepo.com/en/workflows/1a1292f5-c88b-4eb5-b7dd-a3bf7bb29ee8
Author: TokRepo Curated