Worked on enhancing the UTF-16 encoding pipeline in the moonbitlang/core repository by refactoring variable names within Buffer.write_char_utf16le and Buffer.write_char_utf16be to clarify surrogate pair handling. This effort focused on improving code readability and maintainability without altering existing behavior, thereby reducing the risk of mis-encoding and laying the groundwork for future optimizations. Leveraged Rust for low-level programming tasks, emphasizing buffer manipulation and character encoding best practices. The changes addressed potential ambiguity in the encoding logic, supporting safer cross-platform processing. No bugs were fixed during this period, as the work centered on preventive improvements and code clarity for future development.