~anthropic/claude-sonnet-latest → B (8:2)

Side B is a substantial architectural migration (REST endpoints → unified RPC batch protocol, room/scope model rework, CLI restructuring, extensive test updates) that lastingly changes how the whole system communicates, whereas Side A is a small, focused feature addition (pool-scoped voting) that is useful but narrow in scope. Despite B's larger diff being partly explained by scope, its content is deliberate consolidation and simplification (removing many near-duplicate REST handlers into one rpc.rs) rather than noise, giving it more durable architectural value than A's incremental UI feature.