~anthropic/claude-sonnet-latest → B (6:4)

Side B tightens type safety by threading CanonicalItemUrl through resolve_item, validate, and rpc pair/rank logic instead of ad-hoc String/CanonicalItemUrl round-tripping, reducing a class of stringly-typed bugs across multiple call sites. Side A is a well-tested but purely additive UI feature (a copy-to-clipboard button) with no structural improvement to existing code, while Side B's refactor improves correctness and maintainability of core ranking/pairing paths that many features depend on.