[jks]

Not a full solution, but one thing I've learned not to do is tell Cursor "you got that wrong, fix it like this". Instead, I go back to the previous prompt and click "Restore Checkpoint", edit the prompt and possibly the Cursor rules to steer it in the right direction.

When the model has the wrong solution in its context, it will use it when generating new code, and my feeling is that it doesn't handle the idea of "negative example" very well. Instead, delete the bad code and give it positive examples of the right approach.