[Codex App][GPT-6 Astra] Edited files and changes are not displayed

What version of the Codex App are you using (From “About Codex” dialog)?

v26.901.51231

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Darwin 23.5.0 arm64 arm

What issue are you seeing?

When using GPT-6 Astra in the latest Codex App (v26.901.51231), edited files are not displayed in the conversation UI.

The files are actually modified successfully on disk, but:

1. The edited files do not appear in the conversation after Astra modifies them.
2. Clicking "Changes" in the top-left corner does not show the modified files or diffs.
3. The file changes can still be confirmed externally using Git or an editor.
4. This issue only occurs in conversations using GPT-6 Astra.
5. When using other models in Codex App, edited files and the "Changes" view are displayed correctly.

Steps to reproduce:

1. Open a local project in Codex App.
2. Start a new conversation using GPT-6 Astra.
3. Ask Astra to modify one or more files.
4. Wait for the task to complete.
5. Confirm that the files have actually been modified on disk.
6. Check the conversation UI — no edited-file information is shown.
7. Click "Changes" in the top-left corner — no modified files or diffs are displayed.
8. Start another conversation using a different model and perform the same file edit.
9. The edited files and changes are displayed normally with the other model.

Expected behavior:

After GPT-6 Astra edits files, Codex App should display the modified files in the conversation and show their diffs in the "Changes" view, consistent with the behavior of other models.

Actual behavior:

GPT-6 Astra successfully modifies the files, but Codex App does not display the edited files or any changes in the "Changes" view.

This appears to be specific to GPT-6 Astra, because the same Codex App version and project work correctly when using other models.

What steps can reproduce the bug?

1. Open a local project in Codex App.
2. Start a conversation with GPT-6 Astra.
3. Ask it to edit any file.
4. The file is successfully modified on disk, but the edited file and diff are not shown in the conversation or in the "Changes" panel.
5. Repeat the same steps with another model.
6. The edited files and diffs are displayed normally.

The issue is consistently reproducible and appears to be specific to GPT-6 Astra.

What is the expected behavior?

No response

Additional information

No response

Start by reproducing the issue in the Codex App with GPT-6 Astra, then repeat the same file edit with another model for comparison. Trace how completed edits are reported to the conversation and Changes view; done means Astra's edited files and diffs appear there as they do for other models.