Then you are boned unless it was architected well. LLMs tend to stack a lot of complexity at local scopes, especially if the neighboring pages are also built poorly.

E.g pumping out a ton of logic to convert one data structure to another. Like a poorly structured form with random form control names that don’t match to the DTO. Or single properties for each form control which are then individually plugged into the request DTO.

Your responsibility as a developer in this new world is design and validation.

A poor foundation is a design problem. Throw it away and start again.