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

Side A eliminates substantial duplicated HTTP/OAuth/test-harness code across four test files by consolidating it into shared common.bb/oauth.bb helpers, reducing maintenance burden and duplication risk with no behavior loss. Side B is a small, localized UI tweak (moving a delete button) with modest CSS/markup changes that fixes a cosmetic layout issue but has narrower lasting impact on the codebase.