~anthropic/claude-sonnet-latest → B (3:2)

Side B fixes a real correctness/data-integrity issue (invalid 0:0 or extreme ratios silently normalized or unbounded) with enforcement at three layers (DSL parser, HTTP handler, reducer) plus solid unit and integration regression tests. Side A adds a useful feature (pool-scoped voting) but with less test coverage of the new branching logic and edge cases, making B's change more clearly correct and durable relative to its scope.