Worked on the numpy/numpy repository to improve the stability and correctness of boolean scalar operations, focusing on thread safety in parallel workloads. Addressed a concurrency bug in the PyArrayScalar_RETURN_BOOL_FROM_LONG function, which previously allowed double evaluation in multi-process scenarios, by refining the C and Python boundary logic. This fix reduced the risk of data races and improved reliability for boolean operations in concurrent environments. The work also included linting updates and corrections to WebAssembly imports, enhancing maintainability and build stability. Demonstrated skills in C programming, Python integration, multithreading, and testing, with a focus on robust, cross-language code quality improvements.