Free courseintermediate
OpenAI Codex: Terminal-Native AI Coding
A practical, hands-on course on OpenAI Codex - the CLI, cloud tasks, and IDE extension - grounded in the current official docs
Free forever. No paywall - sign in only if you want progress tracking.
What you'll learn
- Install, authenticate, and run Codex across the CLI, IDE, and cloud
- Control autonomy with sandbox modes and approval policies
- Steer projects with AGENTS.md and ~/.codex/config.toml
- Automate Codex in scripts and CI with codex exec and JSON output
- Extend Codex with MCP and delegate long tasks to Codex Cloud
Prerequisites
- Comfort in a terminal (running commands, editing files)
- Basic Git (repos, diffs, commits)
- A ChatGPT plan or an OpenAI API key
- Node.js or Homebrew installed for the CLI
All courses are free. No purchase required.
Course roadmap
5 modules1
Foundations
2 lessons20m
2
The Core Loop
3 lessons34m
3
Configuring Codex
3 lessons34m
4
Automation and Extension
2 lessons23m
5
Cloud, IDE, and Real Workflows
4 lessons45m