This isn't agentic coding. I haven't even tried that yet.

I'm prompting every change set, reviewing the outputs, then reviewing the total changes.

I'm sitting at my PC all day doing this - I used to be productive in short bursts, now I'm productive all the time. It's addictive.

I don't completely disagree with what you are saying -- but there's no way you produce and review 20k lines a day. That part is clearly false. Even if Claude generated it in 10 seconds and it needed no changes you probably still couldn't review that much sensibly.

I used Claude a lot on a recent project where it probably wrote 15-20k lines in a month, and it was overall excellent.