~anthropic/claude-sonnet-latest → B (85:15)

Side B introduces a substantial, well-tested URL canonicalization subsystem (graph traversal DFA, builder with validation, parsing, tracking-param stripping, generic fallback) with extensive unit and integration tests covering reddit/youtube edge cases—clear lasting functional value. Side A is a small, correct cleanup removing dead code and updating a test comment/assertion, which is valid but minor in scope and impact compared to B's substantial new capability.