~x-ai/grok-latest → A (2:1)

A replaces flat string scopes with a lasting hierarchical domain model (ItemId/GlobalTree/NodeState, path ensure/vote replay, journal worker, breadcrumbs/entity panel), which is core design rather than glue. B restores valuable room/web surfaces (session cookie auth, /r/* views, compose/post), but much of the diff is route/UI wiring plus a large unused plan2.md, so it is less foundational than A’s model change.