~anthropic/claude-sonnet-latest → B (65:35)

Side B is a substantive type-safety refactor that threads CanonicalItemUrl through resolve_item, validation, scope-rank computation, and pair selection, eliminating repeated string-to-newtype conversions and reducing risk of key-mismatch bugs, backed by real call-site updates across multiple files. Side A is a small, focused bugfix (skip pinned Reddit posts) with a test, which is valuable but narrower in scope and impact than B's broader structural improvement.