This is a complete guide to OpenAI Codex, covering everything from the basics to the advanced workflows that actually make a difference in real projects.
We build up step by step, so you can follow along from the start or skip ahead to whatever you're stuck on. By the end, you'll have a clear picture of how to fit Codex into your day-to-day development workflow.
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00:00:00 - Introduction
00:00:19 - What is Codex ?
00:06:49 - Codex Vs Claude Code
00:10:00 - Pricing & Usage Limits
00:15:05 - Codex App
00:33:57 - Codex on the Web
00:36:32 - Intro to Codex CLI
00:55:25 - / Slash Commands
01:01:59 - Codex in Headless Mode
01:06:39 - Git and GitHub
01:17:05 - What is AGENTS.md ?
01:22:15 - Understanding Sub-Agents
01:39:24 - How Skills Work
01:48:43 - Introduction to MCP Server
02:00:49 - Git Worktree Explained
02:17:35 - Integrating Database
02:22:40 - Deployment