How to debug the Codex/ChatGPT Mac app UI with Chrome remote debugging
dotey · x · 2026-10-06
A step-by-step trick to debug the Codex/ChatGPT Mac app UI:
- Quit the running Codex app.
- Launch it with remote debugging: open /Applications/ChatGPT.app --args --remote-debugging-port=8315 --remote-allow-origins=http://localhost:8315.
- In Chrome, open chrome://inspect/ and go to Remote Target.
- Find ChatGPT app://-/index.html in the list, click inspect, and a DevTools window opens — debug the Codex UI just like a regular web page.
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