Worked on enhancing API reliability and developer experience for the SengokuCola/MaiMBot repository by implementing a unified error handling and messaging system. Developed a centralized error formatting utility in TypeScript, standardizing API error messages to ensure clarity and consistency across the application. Addressed issues with empty error details, resulting in more robust and user-friendly API responses. Focused on improving debugging and incident response by establishing consistent error contracts, which reduced support escalations and streamlined troubleshooting. Demonstrated skills in API development, error handling, and testing, with all contributions centered on improving code quality and maintainability within a Node.js environment.