During December 2025, Mezo focused on backend development for the lichess-org/lila repository, addressing API consistency by removing a legacy documentation endpoint. Using Scala and leveraging API development expertise, Mezo updated all related references throughout the codebase to align with the current API structure. This targeted refactoring reduced the risk of broken integrations and clarified the API contract for external developers, supporting a cleaner and more maintainable interface for future work. The changes demonstrated careful API governance and documentation hygiene, ensuring that the backend remains robust and easier to integrate with, while minimizing confusion and technical debt for the project.