I built entire AI website builder https://playcode.io using it, alone. 700K LOKs total. It also uses Opus. So believe me, I know how it works. Trick is simple: never ever expect it finds necessary files. Always provide yourself. Always.
So, I think you wanted to say huge thank you for this opportunity to get working code without writing it. Insane times, insane.
Huge thanks for 1M context window included to Max subscription.