I've tried very earnestly to use opus 4.5 to get rid of some backlog tasks that were too tedious to do manually. It turns out that they're still extremely tedious because I have to make every single non trivial decision for the model, unless I don't care one iota about the long term sustainability of the code base. And by long term, I mean more than a week. They're good for saving keystrokes or doing fuzzy searches for me. "Design"? No, that is an anthropomorphism.