openai/gpt-5.2-chat → A (9:1)

Side A introduces substantial functional changes across the DSL parser, block masking system, prose tokenization, linkification logic, external resolver behavior, and adds extensive new tests. It improves determinism, enforces stricter parsing rules, enhances URL/item reference handling, and refactors HTML link generation. Side B mainly removes a wrapper shell in one template and adjusts CSS styling for ranking lists, which is comparatively minor and largely presentational. Therefore, Side A contributed significantly more.