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

Side B implements a substantial, real feature: a background Reddit fetch worker with OAuth, rate-limit/backoff handling, JSON parsing for posts/subreddits, URL mapping, and wiring into AppState/HTML routes, backed by several unit tests—this is genuine, functional lasting capability. Side A is a well-tested refinement to an already-existing pair-selection heuristic, which is useful but more incremental/tuning-focused than a new capability.