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

Side A is a large mechanical rename (CanonicalItemUrl -> ItemId) that reorganizes types but adds little new behavior, and it deletes a large planning doc that itself documents the refactor's incompleteness (e.g. leaving CanonicalItemUrl references, opaque fallback hacks). Side B implements a concrete, well-tested algorithmic improvement (component-aware pair selection with established/isolate sub-priorities and rank-zip refinement) that directly improves product behavior and is validated with new targeted unit tests, making it more durable, self-contained value.