Worked on the mong/mongts repository to address a configuration issue affecting year handling in TypeScript applications. Focused on restoring correct defaults by reverting recent changes, ensuring that maxYear remained at 2025 and defaultYear at 2024 to prevent downstream date-related errors. Applied configuration management best practices by implementing a traceable and well-documented revert, which stabilized year settings across modules and preserved expected user behavior. Utilized TypeScript for precise code changes and maintained clear commit history for future reference. The work emphasized reliability and maintainability, resolving a critical bug without introducing new features during the month-long contribution period.