openai/gpt-5.2-chat → A (9:1)

Side A makes extensive, repository-wide changes including running rustfmt across many files, reorganizing imports, reformatting large portions of the codebase, pinning rustfmt/clippy in rust-toolchain.toml, adding VS Code settings, and minor CSS cleanup. Although mostly formatting and tooling-related, it affects a substantial portion of the project. Side B only deletes a single test function, a very small and localized change. Therefore, Side A contributed significantly more.