Almost none of the domain knowledge came from Claude. This is something I did by hand 40+ years ago (an assembler and a disassemble/debugger, which is in parts similar to the emulator)
This time it was almost as fun : 1/8 of the mental effort per line, x 8 the speed.
rule #1 of ai programming: read and approve everything before accept.
rule #2 do not let it write commit messages - i did not know notice that until many commits later. they are horrible. change 10 things - writes about the last one, too peppy too.
This is the same company behind Anthropic's Titanium cube vending fridge, recently on the front page. As of now, the leaderboard is
#1 Claude 4 Opus
#2 (distracted?) Human