Agent skill

Codex Skill

by Microck in Microck/ordinary-claude-skills

A skill your agent uses when user asks to leverage codex, gpt-5, or gpt-5.1 to implement something (usually implement a plan or feature designed by Claude).

Custom licenceAuto-check passed

Install Codex Skill

skills CLI
$ npx skills add Microck/ordinary-claude-skills --skill codex-skill -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Microck/ordinary-claude-skills codex-skill --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Microck/ordinary-claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills_all/codex-skill .claude/skills/codex-skill && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
codex-skill
GitHub stars
401
Used in
1 other repo
Token cost
~3.3k tokens
SKILL.md length
1,161 words
Files
2
Skills in repo
97
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when user asks to leverage codex, gpt-5, or gpt-5.1 to implement something (usually implement a plan or feature designed by Claude).

  • Works in 2 steps: Installation verification → First-time setup: If not installed,…
  • User asks to leverage codex
  • SKILL.md covers Prerequisites, Core Principles, Codex CLI Commands and Execution Workflow, plus 4 more sections
  • Calls codex, npm and brew

What it does

Codex Skill is an agent skill from Microck/ordinary-claude-skills. Use when user asks to leverage codex, gpt-5, or gpt-5.1 to implement something (usually implement a plan or feature designed by Claude). Provides non-interactive automation mode for hands-off task execution without approval prompts.

Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `metadata.json`).

It works with OpenAI. The repository describes itself as: An unappealing collection of Claude Skills and resources.

When your agent uses it

  • User asks to leverage codex
  • Gpt-5.1 to implement something (usually implement a plan
  • Feature designed by Claude)

Example prompts

  • “/codex-skill”

Requirements

  • Node.js
  • Pre-approved tools (allowed-tools): Read, Write, Glob, Grep, Task, Bash(cat:*), Bash(ls:*), Bash(tree:*), Bash(codex:*)

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

  1. Installation verification
  2. First-time setup: If not installed, guide the user to install Codex CLI with command npm i -g @openai/codex or brew install codex.

What it can do on your machine

Read from SKILL.md and the folder at commit 1056d29. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Glob
    • Grep
    • Task
    • Bash(cat:*)
    • Bash(ls:*)
    • Bash(tree:*)
    • Bash(codex:*)

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • codex
    • npm
    • brew

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Codex Skill loads about 3.3k tokens when it runs. Until then it costs about 61 tokens; SKILL.md has 1,161 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~61
When it runs · the whole SKILL.md, loaded when a task matches
~3.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,161 words (~3,304 tokens).

“You are operating in codex exec - a non-interactive automation mode for hands-off task execution.”

— opening of SKILL.md by Microck, Custom licence
name
codex-skill
allowed-tools
Read, Write, Glob, Grep, Task, Bash(cat:*), Bash(ls:*), Bash(tree:*), Bash(codex:*)

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in skills_all/codex-skill of Microck/ordinary-claude-skills.

  • SKILL.md
  • metadata.json

Open the folder on GitHubat commit 1056d29

Used in 1 other repository

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Microck/ordinary-claude-skills, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Codex Skill next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Codex Skill compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Codex Skill this skillMicrock/ordinary-claude-skills4011 repos~3.3kAutomated safety check: PassCustom licence
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AI SDKvercel-labs/ai-facts16821 repos~1.2kAutomated safety check: PassNone
AI Image Generation and Editingzhayujie/CowAgent47k—~1.3kAutomated safety check: PassMIT
PR Design DocOpenHands/OpenHands90k—~2.4kAutomated safety check: PassMIT
SEO GeoReScienceLab/opc-skills1.8k4 repos~2.1kAutomated safety check: PassApache-2.0

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Works with

Questions about Codex Skill

What does Codex Skill do?

A skill your agent uses when user asks to leverage codex, gpt-5, or gpt-5.1 to implement something (usually implement a plan or feature designed by Claude). Codex Skill is an agent skill from Microck/ordinary-claude-skills.1 to implement something (usually implement a plan or feature designed by Claude).

When should I use Codex Skill?

Codex Skill fits situations like: user asks to leverage codex; gpt-5.1 to implement something (usually implement a plan; feature designed by Claude).

How do I install Codex Skill in Claude Code?

Run `npx skills add Microck/ordinary-claude-skills --skill codex-skill -a claude-code`. Or copy the skill folder (skills_all/codex-skill in Microck/ordinary-claude-skills) into .claude/skills/codex-skill in your project. Claude Code loads it when a task matches its description.

How do I install Codex Skill in Codex?

Run `npx skills add Microck/ordinary-claude-skills --skill codex-skill -a codex`. Or copy the skill folder (skills_all/codex-skill in Microck/ordinary-claude-skills) into .agents/skills/codex-skill in your project. Codex loads it when a task matches its description.

Can I use Codex Skill in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Microck/ordinary-claude-skills --skill codex-skill -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/codex-skill, .gemini/skills/codex-skill, .github/skills/codex-skill and .opencode/skills/codex-skill in your project.

What does Codex Skill need to run?

Going by SKILL.md and its folder, Codex Skill needs the command-line tools its instructions call (codex, npm and brew). Our summary lists: Node.js. Its frontmatter pre-approves these tools: Read, Write, Glob, Grep, Task, Bash(cat:*), Bash(ls:*), Bash(tree:*), Bash(codex:*).

Does Codex Skill access the network?

SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Codex Skill safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Codex Skill use?

Codex Skill has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Codex Skill use?

About 3.3k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Codex Skill?

Skills that share tags, products or a category with Codex Skill: Geo Fundamentals (wasp-lang/wasp, 19k stars), AI SDK (vercel-labs/ai-facts, 168 stars), AI Image Generation and Editing (zhayujie/CowAgent, 47k stars) and PR Design Doc (OpenHands/OpenHands, 90k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Codex Skill?

Microck (a GitHub user) maintains it in Microck/ordinary-claude-skills, which has 401 GitHub stars. The repository holds 97 skills in this directory. The repository was last updated on September 6, 2026.

Source: Microck/ordinary-claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.