How did you write 200k lines of code in nine months? Was that all functioning code? Was some stuff generated? Retaining ~730 LoC per day including weekends for

How did you write 200k lines of code in nine months? Was that all functioning code? Was some stuff generated? Retaining ~730 LoC per day including weekends for nine months is a really crazy pace and I'd love to hear more about that workflow.