Worked on backend stability and build system reliability for the alibaba/MNN repository, focusing on targeted bug fixes over a two-month period. Addressed build configuration issues by implementing conditional logic in CMake to ensure CUDA rendering sources were preserved only when appropriate flags were set, preventing unintended file exclusions and improving build consistency. Additionally, refined CPU frequency policy scanning in C++ to process only valid directories, eliminating spurious error logs and enhancing the reliability of policy enforcement workflows. The work emphasized careful validation and documentation, contributing maintainable solutions that improved both build system configuration and backend observability across multiple deployment scenarios.