> People are already doing what you're saying can't be done, everyday, when they change production systems. Only seemingly so. People do break tests when they

> People are already doing what you're saying can't be done, everyday, when they change production systems. Only seemingly so. People do break tests when they are writing (or removing) code, and even intermittent commits often don't pass tests (they thus have to be squashed before the merger, they only exist for making reviewer's jobs easy and keeping them risks faulty bisect for example). Development and deployment are separate things.