Codex

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Codex is OpenAI’s software-engineering agent. It ships as an open-source CLI, an IDE extension, a desktop app and cloud tasks, and is included with ChatGPT plans.

Get started

Codex quickstartdevelopers.openai.com Pricinglearn.chatgpt.com openai/codex on GitHubgithub.com

Guides

Codex CLI docs Codex cloud docs IDE extension

Skills & Routines

AGENTS.md

Open format for a repo-level instructions file read by coding agents such as Codex.

Resources

A practical guide to building agents
OpenAI PDF on agent use cases, model, tool and instruction design, orchestration patterns and guardrails.cdn.openai.com
OpenAI Codex CLI
OpenAI's coding agent; this repository holds the open-source Codex CLI that runs locally in the terminal.github.com

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