openai/gpt-chat-latest → B (50:1)

Side B introduces a substantial new URL canonicalization subsystem: a semantic graph with traversal, parsing, canonical URL generation, breadcrumbs, graph validation via a builder, and extensive unit/end-to-end tests covering Reddit, YouTube, and generic URLs. Side A only removes client-side form validation attributes (`data-check-action`/`data-check-rpc`) from a single HTML form, a small behavioral tweak with far less enduring architectural impact.