Cursor 3.15.6: Codex can no longer be moved into the Agent tab group

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Found a working fix for this. I posted it here:

https://forum.cursor.com/t/claude-code-extension-no-longer-appears-in-the-right-sidebar-after-cursor-3-15-6-update/167700

Steps:

  1. Press Ctrl/Cmd + Shift + P to open the Command Palette.

  2. Run View: Move View.

  3. Select Codex (or whichever extension/view you’re trying to move).

  4. Choose Secondary Side Bar Entry as the destination.

This moves Codex back into the secondary sidebar next to the Cursor Agent panel.

In my case, it also persists after closing and reopening Cursor, so it stays beside the Cursor tab.