Xamy Zhao focused on enhancing numerical stability within the facebookresearch/momentum repository by refactoring the quaternion_to_xyz_euler conversion function, a core component in gradient-based optimization pipelines. Using PyTorch and Python, Xamy introduced a helper method to handle near-zero denominators, directly addressing potential instability in gradient computations. The approach aligned with established stable patterns from related projects, ensuring consistency and reliability. This targeted bug fix improved the robustness of downstream training processes that rely on quaternion math. While the work was limited to a single bug fix over the month, it demonstrated depth in numerical methods and careful attention to gradient computation reliability.