~x-ai/grok-latest → A (2:1)

A fixes real product bugs: Reddit listing children no longer go through ensure_path (apply_entity_under_parent avoids /comments/ path pollution) and unranked items show stored titles via child_label, with expanded SSE/children integration tests. B is a solid type-hygiene refactor (CanonicalItemUrl through resolve_item, Deref on URL newtypes) that reduces String round-trips but adds no equivalent behavioral fix.