skill-codex

Name: skill-codex
Author: skills-directory

by skills-directory

Verified

A claude code skill to delegate prompts to codex

1,271stars

95forks

Added 12/27/2025

View on GitHub Download ZIP

AI Agentsclaudeclaude-codecodex

Installation

# Add to your Claude Code skills
git clone https://github.com/skills-directory/skill-codex

Getting Started

Guides for using ai agents skills like skill-codex.

Caveman: Cut Claude Token Use by 65%
How agent-side prompt compression works, when to use it, and when not to.
What is an AI Skills Marketplace?
Definitions, how marketplaces work, and how to choose between them in 2026.
Getting Started with AI Skills

Security ReportVerified

Last scanned: 4/30/2026

{
  "issues": [],
  "status": "PASSED",
  "scannedAt": "2026-04-30T06:27:27.206Z",
  "semgrepRan": false,
  "npmAuditRan": true,
  "pipAuditRan": true
}

README.md

Agentic AI for Beginners

Build your first AI agent from scratch - tool use, ReAct pattern, memory, deployment

41 minBeginner

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Codex Integration for Claude Code

Purpose

Enable Claude Code to invoke the Codex CLI (codex exec and session resumes) for automated code analysis, refactoring, and editing workflows.

Prerequisites

codex CLI installed and available on PATH.
Codex configured with valid credentials and settings.
Confirm the installation by running codex --version; resolve any errors before using the skill.

Installation

This repository is structured as a Claude Code Plugin with a marketplace. You can install it as a plugin (recommended) or extract it as a standalone skill.

Option 1: Plugin Installation (Recommended)

Install via Claude Code's plugin system for automatic updates:

/plugin marketplace add skills-directory/skill-codex
/plugin install skill-codex@skill-codex

Option 2: Standalone Skill Installation

Extract the skill folder manually:

git clone --depth 1 git@github.com:skills-directory/skill-codex.git /tmp/skills-temp && \
mkdir -p ~/.claude/skills && \
cp -r /tmp/skills-temp/plugins/skill-codex/skills/codex ~/.claude/skills/codex && \
rm -rf /tmp/skills-temp

Usage

Important: Thinking Tokens

By default, this skill suppresses thinking tokens (stderr output) using 2>/dev/null to avoid bloating Claude Code's context window. If you want to see the thinking tokens for debugging or insight into Codex's reasoning process, explicitly ask Claude to show them.

Example Workflow

User prompt:

Use codex to analyze this repository and suggest improvements for my claude code skill.

Claude Code response: Claude will activate the Codex skill and:

Ask which model to use (gpt-5.5, gpt-5.4, gpt-5.4-mini, gpt-5.3-codex-spark, or gpt-5.3-codex) unless already specified in your prompt.
Ask which reasoning effort level (low, medium, or high) unless already specified in your prompt.
Select appropriate sandbox mode (defaults to read-only for analysis)
Run a command like:

codex exec -m gpt-5.3-codex-spark \
  --config model_reasoning_effort="high" \
  --sandbox read-only \
  --full-auto \
  --skip-git-repo-check \
  "Analyze this Claude Code skill repository comprehensively..." 2>/dev/null

Result: Claude will summarize the Codex analysis output, highlighting key suggestions and asking if you'd like to continue with follow-up actions.

Detailed Instructions

See plugins/skill-codex/skills/codex/SKILL.md for complete operational instructions, CLI options, and workflow guidance.