Up to now, my attempts at doing what the author claims to be possible ends up in a broken piece of code that the agent only makes worse when asked to debug, and

Up to now, my attempts at doing what the author claims to be possible ends up in a broken piece of code that the agent only makes worse when asked to debug, and finally it wont even compile. There seems to be a threshold of difficulty above which the agent will go bug-runaway. I honestly haven't seen this threshold going up. If anything, it seems to be saturating.