Andrew Lin refactored the tokio::select! macro in the tokio-rs/tokio repository, centralizing imports to streamline the macro’s implementation. By removing most local use declarations and routing dependencies through the support module, he improved code clarity and reduced the risk of naming conflicts. This work, accomplished using Rust and leveraging macro_rules for macro development, enhanced the maintainability and readability of the macro’s codebase. The changes established a more standardized import structure, making future enhancements and code reviews more straightforward. Although the contribution focused on a single feature, it demonstrated thoughtful code organization and a solid understanding of asynchronous programming patterns.