Contributed to pandas-dev/pandas and mathworks/arrow by delivering four features and resolving two bugs over two months, focusing on documentation, code hygiene, and error handling. Enhanced API documentation for Series.from_arrow and improved maintainability by refactoring NumericDtype code, streamlining Arrow data interoperability. In mathworks/arrow, clarified pyarrow.compute documentation and added Python usage examples, while removing unused imports to improve code cleanliness. Improved pandas API documentation across Styler, ExcelFormatter, and data handling utilities, strengthening developer guidance and onboarding. Addressed error handling by ensuring pandas_dtype raises consistent TypeError for unsupported NumPy types. Worked primarily in Python and C++, emphasizing data processing and software maintenance.