Ask Codex to debug and fix broken apps

Melvin Vivas · X post · 2026-07-21 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

Quick tip: when an app doesn't work, hand the problem to OpenAI Codex to fix. The creator says it is pretty good at this kind of debugging.

Key points

• When an app is broken, give the debugging task to the Codex coding agent.
• The creator says Codex is pretty good at diagnosing and fixing apps that aren't working.

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 an app breaks, ask Codex to find and fix the problem.