Diff not showing in VSCode?

Hey all, I seem to be running into an issue where the chat sidebar diff is missing.

Even on a clean file, and prompting minor changes, I cannot get the VS Code Codex extension to show the specific changes it made along with that very helpful Undo button for when it does too much. I do see it collecting changes while it’s working/thinking, but when complete it’s removed and instead provides a useless link to the file it was working on.

Is this the case for anyone else? I’ve tried rolling back to old versions, refreshing windows, closing/reopening, etc but haven’t had any luck.

Could anyone that sees this and uses VS Code just chime in with whether you can see the inline diff in the chat panel or also cannot?

I do use the Codex with the VSCode extension on Windows. As such if you are using Mac it may not be an apples to apples problem.

Can you share the steps and some screen shots of what to look for and I will try it.

Hi @EricGT thanks so much for taking the time. Here’s a screenshot of the missing functionality from another thread here from 2025 (with no replies):

I am on Mac, and was able to see the same until recently (about a week or two ago). After any prompt that changed code, it would appear at the bottom of the chat, above the text area. The expand button would expand a small but useful diff of just the changes made due to the last prompt (not a full diff from last commit).

Honestly feel a little crazy that this isn’t a hot topic. I used that Undo button fairly often when Codex went a bit too far. I can’t imagine I’m the only one that wove that little bit of UI heavily into their workflow..? Am I holding it wrong?

In my current Codex project on Windows 11, using VSCode with the VSCode Codex extension this is what the latest reply where code files were updated returned.

image

The full dialog

Expanding the first


Extension details

Thanks so much for the follow up. That is the UI I’m missing, so presumably this is either a Mac issue, or more likely something corrupt locally. I will continue to debug on my end!

You can discuss Codex-related issues here, but the official place to report them is the OpenAI Codex GitHub Issues.

I did a quick ChatGPT search and found some that noted similar problems.

It’s worth searching existing issues:

  • If it matches your situation, consider adding a :+1: reaction to increase visibility.
  • If nothing aligns, open a new report with clear reproduction details.