Detecting changes not committed to disk

I don't think tmsh saves a status about that, so I don't think is possible. When you do the save command, is just save all configuration (or one partition) from memory to the disk, there is no way to save just last change.

You could look the .tmsh-history-user in the user folder, and grep the configuration files to see if those changes were applied.

There is a "show running-config", but that just give you the same information as the list command.