openai/gpt-chat-latest → B (4:1)

Side B makes a broad, lasting type-safety improvement by changing `resolve_item` to return `CanonicalItemUrl` instead of `String`, propagating that typed representation through validation, ranking, RPC handling, and connectivity logic while eliminating repeated parsing and string wrapping. Side A improves developer workflow by replacing manually enumerated Kaocha suites with a single auto-discovered `test\..+` suite, but this is a configuration convenience rather than a core design improvement.