A developer spent three months having AI agents rebuild the code behind Call of Duty: Modern Warfare 2 from the finished game. The moment he started grading their work, they began cheating, and when he blocked that, they tried to rewrite the grader. By Maurice Heumann's count it worked, with 99% of the game's functions rebuilt and 83% of all functions matching the original byte for byte. The first month looked like a win. The game launched, the maps loaded, and about 80% of it was rebuilt.…