[VS Code Remote-SSH] Codex Diff crashes after clicking Review for any Codex edit

What version of the IDE extension are you using?

26.727.40816

What subscription do you have?

chatgpt plus

Which IDE are you using?

VS Code

What platform is your computer?

Microsoft Windows NT 10.0.19043.0 x64

What issue are you seeing?

After Codex modifies a file, the hover preview in the changed-files list
correctly displays the changes.

However, clicking Review opens the Codex Diff tab and displays the
generic “Oops, something went wrong” error.

What steps can reproduce the bug?

1. Open a workspace through VS Code Remote-SSH.
2. Start a new Codex conversation.
3. Ask Codex to make a small reversible edit to an existing text file.
4. Confirm that the hover preview shows the change.
5. Click Review.
6. The Codex Diff page crashes.

What is the expected behavior?

The Codex Diff tab should display the unified diff.

Additional information

Environment

• Connection: VS Code Remote-SSH
• Remote platform: Linux 5.15.0-179-generic x86_64
• IDE extension version: 26.727.40816
• Workspace SCM: SVN

The workspace is an SVN working copy located inside a separate parent Git integration tree. The parent Git repository treats the SVN workspace as untracked.

Troubleshooting performed

• Reloaded the VS Code window.
• Opened a new VS Code window.
• Started a new Codex conversation.
• Made a small reversible edit to docs/test.txt.
• Confirmed that the hover preview displayed the change correctly.
• Clicked Review and reproduced the Codex Diff crash.

Relevant log excerpt

• Error: error boundary
• Component: editor-diff-page-CYrkK60A.js
• Location: 1:1030
• Parent component location: 1:643

Additional context

The problem reproduces in a new window and a new conversation, so it does not appear to be caused by stale conversation data or the previous Diff tab.

The issue may involve the combination of Remote-SSH and a non-Git workspace, but the Codex Diff page should display the change or fail gracefully instead of crashing.