Hans-Guenther Kothgasser developed a configurable Diagnostic Session Management feature for the esrlabs/openbsw repository, focusing on automotive software in C++. He designed a structured approach to managing diagnostic session types and transitions, enabling flexible workflows tailored to customer requirements. By refactoring the core session handling logic, Hans-Guenther improved both configurability and maintainability, simplifying future adaptations and reducing maintenance overhead. His work established a foundation for supporting diverse diagnostic scenarios, streamlining onboarding for new session types. Leveraging his expertise in C++ development and system design, he delivered a solution that enhances the adaptability of automotive diagnostic systems without introducing unnecessary complexity.