Entire CEO @ashtom on how his Codex agent ran for 42 hours over the weekend building the wrong thing entirely: "Over the weekend I had Codex write for 42 hours straight, working on something that I thought was a great plan." "On Monday it actually disconnected because my router restarted. I was like, where are we? And it's like, oh, I'm building this harness. And I'm like, wait a second, what harness are you building? My prompt said build a skill, not a harness." "For 42 hours the agent ran…