Use Codex to Run an App From a Fresh GitHub Checkout
Melvin Vivas · X post · 2026-08-24 · Open on X
Topics: AI Dev Tools & Productivity · Level: beginner
Summary
A short tip: give OpenAI Codex a freshly cloned GitHub repo and ask it to run the app. It finds the dependencies the project needs and installs them for you.
Key points
- Clone a repo, then ask Codex to run the app.
- Codex finds the missing dependencies and installs them automatically.
- This saves you from setting up an unfamiliar project by hand.
Resources mentioned
- OpenAI Codex · tool · openai.com · paid
OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more
Try this
- Next time you clone an unfamiliar repo, ask a coding agent like Codex to install its dependencies and run it.
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