I think all this started with post opus 4.5, that's when claude started wrecking my shit without extreme oversight. Codebases it was making positive contributions to before were slowly and constantly being eroded and wrecked. Give it tasks in isolation? still does well, but the moment it sees the bigger picture, it goes to shit. I chalked it up to a bad model but this makes it all seem like it may have been by design in retrospect.