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codex - 💡(How to fix) Fix Asking Codex for diffs only shows green highlights for additions but does not highlight deletions [1 participants]

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openai/codex#20936•Fetched 2026-05-05 05:55:59
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What version of the Codex App are you using (From “About Codex” dialog)?

26.429.30905

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Microsoft Windows NT 10.0.26300.0 x64

What issue are you seeing?

I'm trying to ask Codex for a diff of proposed changes... but for viewing changed hunks, it doesn't render deletions as red while additions does render in green highlights.

It does not look good for reviewing changes to the code when it involves deletions.

<img width="1024" height="911" alt="Image" src="https://github.com/user-attachments/assets/598dc11e-a14d-4513-a54b-4ed78225b5ed" />

What steps can reproduce the bug?

Ask to generate a diff for proposed changed (e.g. move the chunk of code to another file or delete portion of code)

What is the expected behavior?

It should highlight in red or other distinct color

Additional information

No response

extent analysis

TL;DR

The issue with Codex not rendering deletions in red for diff views may be resolved by checking the color scheme settings or reporting the issue to the Codex support team for further assistance.

Guidance

  • Verify that the color scheme settings in Codex are set to highlight deletions in red, as this might be a configuration issue.
  • Try generating a diff for a simple change, such as deleting a single line of code, to see if the issue persists and if it's specific to certain types of changes.
  • Check if there are any known issues or updates related to diff rendering in the Codex App version 26.429.30905.
  • Consider reporting the issue to the Codex support team with the provided screenshot and steps to reproduce, as it may be a bug that needs to be addressed.

Notes

The issue seems to be specific to the Codex App's diff rendering feature, and without more information about the app's settings or internal workings, it's difficult to provide a more specific fix.

Recommendation

Apply workaround: Report the issue to the Codex support team, as it's possible that this is a known issue or a bug that needs to be fixed in a future update.

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codex - 💡(How to fix) Fix Asking Codex for diffs only shows green highlights for additions but does not highlight deletions [1 participants]