I want the UI to be snappy. I used to dictate using
    observables and other optimization preferences - and
    sometimes still do. But I can also merely add
    constraints - the image should process within 15ms
    presses <enter>. Oh shoot - I meant to write 150ms
    but… oh… I guess lets simply see i the model can do
    it? Wow. I realize… I need to re-evaluate what I
    think of as possible and not.

this resonates with me. Two days ago I was fighting with the GitHub Actions CI pipeline for an open source iOS app I maintain. It was stalling out after an hour, not completing. Sometimes, if I was lucky, it would finish after 45-50 minutes. I told Claude Code "make the CI pass in under 10 minutes. Don't ask me any more questions; I am going to bed and want this to work when I come back."

Claude Code wished me a restful night of sleep (seriously), and when I came back in the morning it had diligently chewed through the problem and was consistently getting the results I'd asked for.