During December 2024, Brnsb developed cross-backend arg_min and arg_max APIs for the narwhals-dev/narwhals repository, enabling direct retrieval of index positions for minimum and maximum values in both Series and Expression objects. This work unified analytics workflows by ensuring consistent behavior across Pandas, Polars, and PyArrow backends, reducing boilerplate for users working in heterogeneous environments. Brnsb focused on API design and library development in Python, emphasizing parity between Series and Expression interfaces. No critical bugs were reported, indicating stable integration. The implementation laid a foundation for future performance improvements and streamlined data analysis pipelines across multiple backend technologies.