Worked on the microsoft/STL repository to deliver Arm64 capability detection within the Standard Template Library, enabling architecture-aware feature detection for optimized code paths on Arm64 devices. This feature was implemented in C++ with a focus on system programming and performance optimization, allowing the STL to dynamically adapt to various Arm64 capabilities at runtime. By introducing this detection mechanism, the work improved both portability and performance for Arm64 builds, reducing the need for architecture-specific workarounds. The contribution strengthened cross-architecture reliability in the STL, ensuring better compatibility and efficiency for developers targeting Arm64 platforms in modern C++ environments.