If it shouldn't be 90k LOC, and it doesn't need a DSL parser then reject it as overcomplicated and unmaintainable. Make it clear how large and complex you expec

If it shouldn't be 90k LOC, and it doesn't need a DSL parser then reject it as overcomplicated and unmaintainable. Make it clear how large and complex you expect it to be and where existing code or framework should be reused so they can go away and address your concerns and so that there's a high chance you'll be able to approve if they do. Above all, you aim to allow the contributor to be productive, you make it clear what constraints they need to operate under in order to use AI codegen effectively. You want to come across as trying to help them and need to take care not to appear obstructive or dismissive.