How do you check to make sure that the LLM hasn’t deleted any data, or changed something you didn’t want to be changed? A colleague did this recently and found

How do you check to make sure that the LLM hasn’t deleted any data, or changed something you didn’t want to be changed? A colleague did this recently and found it had removed crucial data. Better to get it to help you author scripts or difficult parts of scripts, and then review the code carefully.