What are some agent-coded masterpieces?
Given that we can code at 10x speed for at least half a year, one would expect to see at least some pieces of machine-created software with 5 years' worth of equivalent human engineering work.
Are there any we know of?
I've yet to see any masterpieces. I've had a lot of good enough code come out, and some that was blatantly wrong. You still need to be an expert in the domain if you want to use ai codegen effectively. I've been using Claude for a few months now.