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

Side A performs a substantial type-safety refactor (introducing Deref for newtypes, threading CanonicalItemUrl through resolve_item/validate/rpc), reducing ad-hoc string keys and CanonicalItemUrl::parse calls, which lowers risk of subtle bugs across core ranking/validation logic. Side B is a focused UX improvement (auth form morphs in place instead of redirecting) that's useful but narrower in scope and touches less critical, more presentation-layer code.