~anthropic/claude-sonnet-latest → B (9:1)

Side B implements a real feature: pseudonym-based actor identity with UUID-keyed vote dedup, replacing blind edge-merge accumulation with idempotent uuid_votes storage, plus schema version bumps, migration seeding, and updated tests across many call sites—substantive lasting design work fixing a Sybil/re-vote correctness gap. Side A is a pure module reshuffle (moving room_route and url_identity_tests into other files) with no behavioral change, offering negligible lasting value beyond cosmetic reorganization.