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

Side B introduces a real, user-facing DSL semantic change (explanation-first vote syntax) with corresponding parser rework, updated docs, and broad test-fixture migration across server, CLI, and browser integration tests, demonstrating a functional language change with wide validation. Side A is a large but purely internal refactor (moving path/URL types into a shared crate) that improves code organization but changes no external behavior and carries higher risk of regressions without adding new capability.