~x-ai/grok-latest → A (2:1)

A adds a real settlement worker (batched votes, disk append, then ranking recompute into cached_scores), a warm-cache/hot-path split (ranked_items_cached + read locks), and deletes the demo-counter scaffold—lasting concurrency and HTTP design. B is mostly a CanonicalItemUrl→ItemId mechanical migration (plus plan.md deletion); the enum is useful, but internals stay string-backed and behavior largely unchanged, so less net product value per change than A.