openai/gpt-chat-latest → B (4:1)

Side B adds a new reusable stylesheet (`server/static/sorter.css`) defining theme variables and styles for buttons, forms, ranking lists, breadcrumbs, and parser UI, which is a concrete project asset. Side A primarily deletes legacy source files and replaces one design-notes document with another; while cleanup can be useful, the patch shown mostly removes functionality and documentation rather than adding lasting behavior or fixes.