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

Side A replaces an ad-hoc rule-combinator URL engine with a structured semantic graph (DFA + generic fallback) that is architecturally more principled and directly affects production canonicalization logic used by the app, though it deletes test coverage without replacement. Side B is valuable but purely test-infrastructure deduplication (DRYing shared HTTP/oauth helpers across bb test files), which reduces duplication but has no runtime/user-facing impact and carries lower risk/lower lasting design value than a core domain model rewrite.