During July 2025, Zhengjunbo enhanced the apache/nuttx repository’s build system by developing new CMake utilities for conditional source management. He introduced the nuttx_wildcard_sources_ifdef and nuttx_wildcard_sources_ifndef functions, which allow source files to be included or excluded based on defined build conditions. This approach leveraged existing CMake patterns to maintain consistency and reduce onboarding friction for contributors. By focusing on build systems and CMake scripting, Zhengjunbo improved the flexibility and maintainability of multi-platform build configurations, enabling feature-flag driven development and reducing the risk of incorrect source inclusion. No bug fixes were required during this period, reflecting focused feature delivery.