That step still seems to be completely individual. You write it alone, the plan you formulate is local and private, and your coworkers only see the result when the PR is opened. On a team, that's the exact moment alignment should happen, and it's the one place we don't work together nowadays.
GitHub Next recently showed a prototype that gets close to this collaborative experience: https://maggieappleton.com/zero-alignment
I also wonder how other knowledge workers work and how they review each others' work. I believe they would also benefit from a "collaborative prompting" environment, where everyone sees what the others are working on and can step in at any point.
Why isn't this normal yet? Missing tooling, cultural habit, or does collaborating on a prompt not help at all?