Worked on the astropy/astropy repository to enhance the robustness of WCSAxes coordinate plotting by addressing a NotImplementedError that occurred when plotting sliced WCS coordinates. The solution involved implementing a precondition check to ensure both latitude and longitude coordinates are present before plotting, thereby reducing user-facing errors in coordinate-based visualizations. Added regression tests to verify the fix and updated documentation to reflect these changes, improving reliability for downstream plotting workflows. Utilized Python and leveraged expertise in Astrophysics Libraries, Astropy, and coordinate systems, with a focus on testing and data visualization to strengthen the codebase’s reliability and maintainability.