Open Source – Codex
OpenAI develops key parts of Codex in the open. That work lives on GitHub so you can follow progress, report issues, and contribute improvements.
If you maintain a widely used open-source project or want to nominate maintainers stewarding important projects, you can also apply to the Codex for OSS program for API credits, ChatGPT Pro with Codex, and selective access to Codex Security.
Open-source components
| Component | Where to find | Notes |
|---|---|---|
| Codex CLI | openai/codex | The primary home for Codex open-source development |
| Codex SDK | openai/codex/sdk | SDK sources live in the Codex repo |
| Codex App Server | openai/codex/codex-rs/app-server | App-server sources live in the Codex repo |
| Skills | openai/skills | Reusable skills that extend Codex |
| IDE extension | - | Not open source |
| Codex web | - | Not open source |
| Universal cloud environment | openai/codex-universal | Base environment used by Codex cloud |
Where to report issues and request features
Use the Codex GitHub repository for bug reports and feature requests across Codex components:
- Bug reports and feature requests: openai/codex/issues
- Discussion forum: openai/codex/discussions
When you file an issue, include which component you are using (CLI, SDK, IDE extension, Codex web) and the version where possible.