Alex McKee focused on enhancing the stability and reliability of the Netflix-Skunkworks/service-capacity-modeling repository during February 2025. Working primarily in Python, Alex addressed critical backend issues by implementing robust error handling in the weighted latency calculation, ensuring the system defaults to zero latency when no requests are present and preventing runtime exceptions. Additionally, Alex reverted a type hint change to maintain API compatibility, supporting seamless integration for downstream consumers. This work emphasized API design and backend development, prioritizing maintainability and interface stability over new features. The depth of these changes laid a solid foundation for safer, faster future feature development.