Comment by dmix

I do the same, I don't use Claude Code or Codex planning because it is mostly pointless, even with Fable/Astra. I just have multiple agents work on a markdown file which I manually perfect, often breaking into multiple different files for large features or PRs. I also create design 'handoff' documents which I feed into Claude Design or Astra along with screenshots and wireframes. By the time an agent does something I'm well prepared.

I've tried doing the incremental, iterative approach with just Code and it's just not as effective unless you're working on something simple or experimental. Or you're shipping to something non-serious or perpetually beta.