Developed and delivered a demand load control feature for SmartThings HVAC units within the home-assistant/core repository, targeting energy optimization during peak periods and seamless integration with energy-management workflows. The work involved implementing capability checks to ensure device compatibility and expanding test coverage to validate behavior across multiple device states. Focused on test-driven development and integration readiness, the developer used Python and IoT development skills to enhance reliability and support demand-response scenarios. All changes were managed through Git-based collaboration with traceable commits, emphasizing code quality and maintainability. No major bugs were addressed, as the primary focus was robust feature delivery and testing.