During October 2025, Kalathiya Hill worked on the YSTEMandChess/react repository, focusing on backend improvements for lesson management. Using JavaScript, Express.js, and MongoDB, Kalathiya introduced a default lessons file and removed duplicate lesson definitions to streamline data handling. The middleware was refactored for better structure, including hygiene fixes, import corrections, and improved utility management. Token validation logic was enhanced to provide stronger security and more robust error handling. These changes reduced maintenance overhead and improved the reliability of the lesson management workflow, laying a foundation for future scalability and lowering production risk through more maintainable backend architecture.