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

Side B is a substantive type-safety refactor that replaces error-prone String/raw-string item ids with a proper CanonicalItemUrl newtype threaded through validation, RPC pairing, and rank-change computation, reducing a class of stringly-typed bugs and improving compile-time guarantees across core server logic. Side A adds a useful but peripheral dev-only CLI tool (sorterc) that wraps existing server logic for offline linting/compiling, which is valuable tooling but doesn't change or harden the core system's correctness or design the way B's refactor does.