Not an attorney, but its a chat between a non attorney… and well, themselves. It seems no different than a client writing hand written notes. But if they hand wrote a note to… give to their attorney, that seems different (which is how you seem to frame it). I trust that the court articulated clearly, why the defendants “certain notes” were not privileged, however its not surprising that there is nuance. In fact, its no different than how only “certain emails” could be privileged. This also seems like a win for society, if there is some sort of pattern with ai helping with crimes.