During April 2026, contributed to the prebid/prebid-server repository by developing and delivering the Harion Media Adapter, which enabled Harion media support across both site and app contexts. This work focused on backend development and API integration, utilizing YAML configuration to ensure seamless compatibility with existing adapters. The adapter was designed with a modular architecture, preserving the stability and maintainability of the codebase. Integration and stability tests were conducted to confirm reliable operation, with no major bugs reported or fixed during the period. The contribution expanded monetization opportunities while maintaining a clean, extensible structure for future adapter enhancements.