I started with all the standard spec flow and as I got more confident and opinionated I simplified it to my liking.
I think the point of any spec driven framework is that you want to eventually own the workflow yourself, so that you can constraint code generation on your own terms.
I think these type of systems (gsd/superpowers) are way too opinionated.
It's not that they can't or don't work. I just think that the best way to truly stay on top of the crazy pace of changes is to not attach yourself to super opinionated workflows like these.
I'm building an orchestrator library on top of openspec for that reason.
But it was always just a workaround to what I truly wanted (what I'm building now), a full external managed orchestrator loop. The agents aren't aware of the loop, they don't need to be.