In my experience, if I write good, thorough specs, the code adheres to them. And if something's off, I don't go and modify the code, this is when specs and code start to drift. The whole point about OpenSpec is that you create a new change, with a new spec, and then the LLM modifies the code accordingly. If you follow a process, I believe there's less risk of drift. But to each their own, you can obviously choose to own and author the code and have AI write the specs. For me, its more productive to write good specs, as I can write them faster and more people, sometimes not technical, can weigh in.