I used O1 Pro to write a .NET authorization filter which when I wrote it I didn’t even know what that was. I was like “I have this problem, how can I fix it” and it just started going and the solution worked the first try. Everyone at work was like “great job!” I guess I did feed it a bunch of surrounding code and the authorization policy, but the policy only allowed us to attach one security trait when we wanted it to be “attach any number of security attributes and verify the user has at least one”. Still, it solved what likely would have been at least a day or two of research in an hour or so conversation.