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

Side B removes ~1800 lines of a fragile, over-engineered keystroke-transition parser graph (with its brittle race-condition test) and replaces it with a small, testable, deterministic paste-and-go URL parser plus a simpler UI, net reducing complexity and fixing a stated reliability problem. Side A adds real functionality (a pairwise vote-compare page, bridge-pair selection logic, id normalization) but is more feature-churn/addition without removing prior debt, and 'refactor' as commit message undersells substantial new surface area added without corresponding cleanup elsewhere.