During December 2024, Dan-Tiberiu Costin focused on backend development for the mxcube/mxcubeweb repository, addressing robustness and stability in state management. He improved the NState Adapter by implementing a guarded removal mechanism for the UNKNOWN state, ensuring that this state is only removed if present. This approach, developed in Python, prevented runtime errors such as 'x not in list' exceptions during state transitions, thereby enhancing reliability for downstream clients. Although the work centered on a single bug fix rather than new features, it demonstrated careful attention to error handling and stability, contributing to more dependable backend operations within the project.