openai/codex
Lightweight coding agent that runs in your terminal
1What it's for
Lightweight coding agent that runs in your terminal
It is an agent that works on your code: you ask for something in plain words and it reads your project, proposes changes and writes the code for you. You review and decide what to accept.
2Who published it?
openai
openai publishes and maintains this project on GitHub. From their profile you can see their other projects and this one's recent activity.
3What you can use it for
Understand a project
Ask it to explain how the code is organized or what a specific file does.
Fix bugs
Describe the failure and let it find the cause and propose the fix in your code.
Add features
Ask for a new screen, endpoint or script and review it before accepting.
Automate the boring parts
Bulk updates, renames or cleaning up old code without doing it by hand.
4Examples of what you can do
Ideas for getting started with it:
It reads the file and summarizes it in plain language, function by function.
It traces the flow, finds the likely cause and shows you the proposed change.
It writes the new code following the project style and shows you the diff.
Before using it
- The README and license (Apache-2.0) were checked on Oct 14, 2026. We have not installed, tested or security-audited it.
- Its license (Apache-2.0) allows free use, including commercial use.
- As with any open-source code, check what it does before running it on your computer or giving it your data.