~x-ai/grok-latest → A (3:2)

A lands the durable ItemId design (new item_id/item_wire modules, removal of CanonicalItemUrl, and reducer/ranking/RPC/HTML keyed on structured identity), which reshapes the project’s core data model. B is a high-quality, well-tested improvement to pair selection heuristics in pair.rs, but its impact is confined to one algorithm versus A’s foundational type migration.