Some of the games when you play them will store past commands in the save file. Is there a way for the player to toggle this feature on or off?

Could you explain this a bit more detailed? Do you want to remove this feature as a game creator so that your players don't see his history? Or should the player be able to remove the history when he loads his game? You could add a clearscreen command so the player can remove the history.

An option to turn it off or on for both the player or the developer would be great. If the feature was turned off by the developer then maybe add an option for the player to dump the game output to a transcript text file? And what impact do all those stored commands end up having on the size of the save game files should the player end up taking hundreds or even over a thousand turns?