codex - 💡(How to fix) Fix Codex Diff missing background highlights on Remote-SSH [2 comments, 3 participants]

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openai/codex#17293Fetched 2026-04-11 06:18:23
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What version of the IDE extension are you using?

26.406.31014

What subscription do you have?

GPT Plus

Which IDE are you using?

VS Code

What platform is your computer?

Darwin 25.4.0 arm64 arm

What issue are you seeing?

In the Codex Diff view over an SSH connection, the red/green background highlights for changed lines are missing.

<img width="1360" height="214" alt="Image" src="https://github.com/user-attachments/assets/316d9aae-f1e4-4c6f-bd3e-e05308a32b7d" /> <img width="1354" height="212" alt="Image" src="https://github.com/user-attachments/assets/db3c25f3-7f9d-45af-851b-5c6209a4f412" />

What steps can reproduce the bug?

  1. Open VS Code and connect to a remote server using the Remote-SSH extension.
  2. Open a project and modify any file.
  3. Trigger a code edit using Codex, which opens the Codex Diff view for review.
  4. Observe that the red (deleted) and green (added) line-level background highlights are completely transparent/missing.
  5. Attempting to reload the window or change themes does not resolve the issue.

The specific code doesn't matter; all Codex-generated edits consistently fail to render the expected line-level background highlights.

What is the expected behavior?

The Codex Diff view should render full-width background highlights (red for deletions, green for additions).

Additional information

No response

extent analysis

TL;DR

The issue with missing red/green background highlights in the Codex Diff view over an SSH connection in VS Code may be resolved by checking the theme settings or the Remote-SSH extension configuration.

Guidance

  • Verify that the theme used in VS Code supports the background highlights for changed lines in the Codex Diff view.
  • Check the Remote-SSH extension settings to ensure that it is configured to render the line-level background highlights correctly.
  • Try changing the theme or adjusting the Remote-SSH extension settings to see if it resolves the issue.
  • If the issue persists, consider checking for any updates to the Codex or Remote-SSH extensions.

Example

No code snippet is provided as the issue is related to the configuration and rendering of the Codex Diff view.

Notes

The issue may be specific to the combination of the IDE extension version, subscription, and platform used. Further investigation may be needed to determine the root cause.

Recommendation

Apply workaround: Try adjusting the theme settings or the Remote-SSH extension configuration to resolve the issue, as the problem may be related to the rendering of the background highlights.

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