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

Side A removes ~1800 lines of speculative, unreliable keystroke-transition-graph parser code and replaces it with a small, robust paste-and-go implementation, deleting a flaky JS race-condition workaround and a Playwright test that existed only to work around that bug — a clear net simplification and real bugfix. Side B is a mixed bag: it adds a genuinely useful YouTube/query-param URL-identity normalizer with good test coverage, but it also introduces a fragile room-route encoding (concatenating short-id+slug into one path segment, relying on a fixed-width assumption) that degrades URL readability and adds indirection without a clearly compelling justification, making its overall lasting value less clean-cut than A's decisive complexity reduction.