During January 2025, Mikhnenko focused on improving compilation stability for the Altinity/ClickHouse repository by addressing build failures related to missing header includes. Working primarily with C++ and leveraging expertise in build systems and header file management, Mikhnenko identified and resolved issues where critical dependencies such as stdlib.h and vector were not properly declared in key components. By adding the necessary include directives to files like defines.h, BackupStatus.h, and HTTPHeaderEntries.h, Mikhnenko reduced build errors and improved CI reliability. The work, while targeted and narrow in scope, contributed to smoother developer onboarding and more robust build processes for the project.