openai/gpt-chat-latest → B (3:2)

Side B fixes a correctness bug in the core ranking algorithm by replacing the normalization divisor with the canonical degree-based d_max, eliminating oscillation in star-topology graphs and restoring correct stationary rankings. It also adds focused Rust and end-to-end regression tests for star, inverse-star, chain, and cycle cases, whereas Side A is a substantial feature expansion (Reddit OAuth linking and UUID-based identity flow) with broader surface area but less direct evidence of fixing an existing correctness issue.