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Codex Skill

Codex Skill is an agent skill (a SKILL.md file) from feiskyer/claude-code-settings. Leverage OpenAI Codex/GPT models for autonomous code implementation, code review, and plan review. It works with Claude Code, Codex and GitHub Copilot and has 1,664 GitHub stars across a repository of 2 listed skills.

github.com/feiskyer/claude-code-settings/skills/codex-skill (opens in a new tab)

Data as of from the GitHub API; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add feiskyer/claude-code-settings
/plugin   # browse claude-code-settings and install the plugin that contains codex-skill

In the Claude apps, zip the codex-skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/feiskyer/claude-code-settings.git
cp -r claude-code-settings/skills/codex-skill .agents/skills/codex-skill   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/feiskyer/claude-code-settings.git
cp -r claude-code-settings/skills/codex-skill .cursor/skills/codex-skill   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Leverage OpenAI Codex/GPT models for autonomous code implementation, code review, and plan review. Triggers: "codex", "use gpt", "gpt-5", "let openai", "full-auto", "adversarial review", "second opinion review", "用codex", "让gpt实现", "对抗式审查", "让codex审查计划", "第二意见". Use this skill whenever the user wants to delegate coding tasks to OpenAI models, run code or plan reviews via codex, get a second-opinion review from a different model, or execute tasks in a sandboxed environment.

When it triggers

  • "codex"
  • "use gpt"
  • "gpt-5"
  • "let openai"
  • "full-auto"
  • "adversarial review"
  • "second opinion review"
  • "用codex"

More skills in feiskyer/claude-code-settings

2 skills are listed from this repository.

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FAQ

Codex Skill FAQ

Still curious? Email info@appsgit.com.

How do I install the Codex Skill skill?

In Claude Code, run /plugin marketplace add feiskyer/claude-code-settings, then install its plugin from /plugin. For Codex or Cursor, copy the codex-skill folder into .agents/skills/ or .cursor/skills/.

Is the Codex Skill skill free?

Yes. The repository is open source under the MIT license.

Is Codex Skill maintained?

The repository's most recent commit was on Sep 27, 2026. appsgit only lists skills from repositories with a commit in the last six months.