Cursor on Windows: `Codex: New Codex Agent` fails with `command 'chatgpt.newCodexPanel' not found` after update

What variant of Codex are you using?

IDE Extension

Which IDE are you using?

Cursor on Windows.

What issue are you seeing?

After updating the Codex/OpenAI IDE extension, invoking Codex: New Codex Agent fails immediately with this error dialog:

コマンド 'Codex: New Codex Agent' でエラーが発生しました

command 'chatgpt.newCodexPanel' not found

The command palette entry is present, but the contributed command itself is apparently not registered/available at runtime.

This worked before the update. The update was installed through the normal IDE extension update flow; no custom patching or unusual configuration was performed.

Steps to reproduce

1. Use Cursor on Windows with the Codex/OpenAI IDE extension installed.
2. Update the extension when the normal update prompt appears.
3. Invoke Codex: New Codex Agent.
4. Cursor shows: command 'chatgpt.newCodexPanel' not found.

Expected behavior

Codex: New Codex Agent should open a new Codex Agent panel in Cursor.

Actual behavior

The command fails before opening the panel because chatgpt.newCodexPanel is not found.

Environment

• OS: Windows
• IDE: Cursor
• Codex/OpenAI IDE extension: updated immediately before the regression
• Exact extension version: UNKNOWN at the moment
• The workflow also uses Cursor Remote-SSH to a Mac mini, but this error is shown by the Windows Cursor UI before the Codex panel opens.

Why this matters

This is a regression caused by a normal extension update and completely blocks the New Codex Agent workflow. A user should not have to reinstall, downgrade, or manually repair the extension after accepting a standard update.

Please check whether the current Cursor/Windows extension package is failing to register chatgpt.newCodexPanel, or whether the command contribution changed without the UI command being updated.

Start by reproducing Codex: New Codex Agent in Cursor on Windows after a normal extension update, then inspect where chatgpt.newCodexPanel is contributed and registered in the IDE extension package. Confirm whether the command is available at runtime and verify that invoking it opens a new Codex Agent panel without the error.