~anthropic/claude-sonnet-latest → A (7:3)

Side A fixes a genuine, well-diagnosed algorithmic bug (bipartite Markov chain from wrong normalization divisor) with a principled, cited fix and solid regression tests across multiple topologies. Side B is a mixed bag: a URL-path refactor (dropping a '/' separator, seemingly cosmetic/risky) bundled with unrelated YouTube URL normalization and Url-as-HashMap-key documentation tests, lacking a clear unifying rationale and touching many call sites for a stylistic route change of uncertain necessity/value.