During September 2025, Justin Zhang focused on enhancing the robustness of the folder metadata API within the Accenture/sfmc-devtools repository. He addressed a bug where the Results field could be null or undefined, implementing a defensive programming solution in JavaScript and TypeScript to default this field to an empty array. This change prevented downstream errors and improved the stability of folder metadata workflows for other developers. Justin collaborated with backend and API teams, validated his fix through internal testing and code review, and demonstrated skills in API integration, error handling, and full stack development. His work contributed to more reliable API responses.