Automating GitHub Actions with Codex Using ChatGPT Authentication: A Brilliant Hack

infrastructure #agent 📝 Blog|Analyzed: Apr 8, 2026 14:31•

Published: Apr 8, 2026 14:25

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1 min read

Analysis

This is a brilliantly innovative workaround that empowers developers to leverage OpenAI's Codex without incurring pay-per-use API costs. By cleverly extracting and utilizing local ChatGPT authentication tokens, the author demonstrates an exciting new way to fully automate code reviews and PR generation directly from GitHub issues. It's a fantastic showcase of developer ingenuity that significantly lowers the barrier to entry for building advanced AI-driven development workflows.

Key Takeaways

•Bypasses the need for a paid OpenAI API key by using locally stored ChatGPT authentication tokens.
•Demonstrates a fully automated workflow triggered by GitHub issue creation to handle branch generation, code modification, and PR submission.
•Requires encoding the local ~/.codex/auth.json file to base64 and storing it securely in GitHub Actions secrets.

Reference / Citation

View Original

"By utilizing the openai/codex-action, you can easily run Codex on Github Actions to automate tasks such as PR creation and code review. In this article, I will introduce a method to run Codex on Github Actions using ChatGPT authentication, and introduce a use case that automates everything from Issue creation to PR creation as a trigger."

Qiita AIApr 8, 2026 14:25

* Cited for critical analysis under Article 32.

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