What is the Codex Skill for Claude Code?

The Codex Skill is a specialized capability that enables Claude to interface with the OpenAI Codex CLI, allowing for autonomous, non-interactive code execution and system-level task management.

Is it safe to let the Codex skill modify my files?

Yes, safety is managed through sandbox modes. The 'workspace-write' mode limits modifications to your specific project directory, while 'read-only' prevents any changes during analysis tasks.

Does this skill require a separate installation?

Yes, you must have the Codex CLI installed on your system via npm (@openai/codex) or Homebrew before the skill can successfully trigger commands.

How do I enable full autonomous file editing?

To allow the skill to modify your codebase without constant approvals, you can use the 'full-auto' trigger or specify the '-s workspace-write' flag in your commands.

Can I choose which GPT model the skill uses?

Absolutely. The skill supports the '-m' or '--model' flag, allowing you to specify different versions such as gpt-4, gpt-5, or specialized codex models.

Codex Autonomous Coding

Name: Codex Autonomous Coding
Author: feiskyer

byfeiskyer

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1,158

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生産性とワークフロー

Enables autonomous code implementation and system tasks using OpenAI Codex and GPT models directly within your Claude Code environment.

The Codex Skill integrates the OpenAI Codex CLI into Claude Code to provide a powerful, non-interactive automation mode for hands-off development tasks. It allows users to delegate complex workflows—ranging from codebase-wide refactoring and feature implementation to security audits—to advanced GPT models. By utilizing configurable sandbox policies such as workspace-write and danger-full-access, the skill maintains a balance between high-velocity autonomous execution and system security, delivering structured progress updates and comprehensive final reports without requiring constant manual intervention.

主な機能

01Autonomous task execution from start to finish with minimal user prompts

02Support for specific model selection including GPT-5 and custom Codex versions

03Granular sandbox controls including Read-Only, Workspace-Write, and Full-Access modes

04Structured JSON output formatting for detailed metrics and change tracking

05Session resumption capabilities to continue complex, multi-stage development tasks

061,158 GitHub stars

ユースケース

01Full-auto feature implementation and bug fixing within a specific workspace

02Comprehensive security vulnerability scanning and codebase analysis in read-only mode

03Automated environment setup and dependency management using full system access

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add feiskyer/claude-code-settings codex-skill

For use in Claude.ai and ChatGPT

Download Skill