Sergey Guriev developed a stricter Debug build mode for the intel/intel-graphics-compiler repository, focusing on enhancing code quality during development. He implemented a toggleable configuration in CMake that enables the -Wall compiler flag specifically for Debug builds, increasing static analysis coverage and facilitating early error detection without impacting Release builds. Sergey addressed integration details by refining flag propagation and messaging, ensuring stable adoption of the new mode. His work leveraged skills in build configuration and compiler optimization, resulting in improved maintainability and more efficient debugging workflows. The depth of the solution reflects careful attention to both developer experience and code hygiene.