During October 2025, this developer focused on improving cross-platform build stability for the ClickHouse/ClickHouse repository, specifically targeting Darwin and macOS environments. Using C++ and build systems expertise, they addressed a persistent compilation issue by adding a missing <utility> include to the wide_integer_impl.h file. This targeted bug fix resolved Darwin-specific dependency errors, unblocking macOS continuous integration and developer builds. Although no new features were released during this period, their work reduced build failures and CI churn, streamlining onboarding for macOS contributors. The contribution demonstrated attention to platform-specific challenges and a methodical approach to maintaining robust, portable C++ codebases.