openai/gpt-chat-latest → A (4:1)

Side A replaces the URL canonicalization implementation with a new graph-based architecture by removing the old `engine` layer, routing the public API through `graph`/`parse`, and simplifying `registry.rs` to use semantic graph resolution and shared breadcrumb logic. Side B adds a very large mix of prototype code, notes, and even terminal-capture artifacts (for example `forms.rs` and `ranking.rs` include shell prompts), making it a broad initial dump rather than a focused, maintainable project improvement.