Worked on the microsoft/WindowsAppSDK repository to address a critical bug in the MRT resource data merging logic, focusing on type safety and reliability. Applied C++ expertise to correct integer type casting and loop variable usage, resolving type mismatch issues that previously risked runtime exceptions. Enhanced the robustness of the core merging process and expanded unit testing coverage to ensure early detection of regressions. This targeted fix improved build reliability and aligned the codebase with project-wide type-safety standards. The work demonstrated a methodical approach to software development and unit testing, contributing to long-term maintainability and stability for downstream Windows applications.