Worked on the NVIDIA/physicsnemo repository to deliver backward compatibility support for model imports, focusing on maintaining seamless integration across evolving namespaces. Addressed the challenge of legacy workflows by enabling continued use of the older modulus namespace while introducing deprecation warnings to guide users toward updated practices. Utilized Python for backend and API development, implementing regression tests to ensure future changes do not disrupt compatibility. Preserved access to models registered under modulus.models, reducing migration friction and supporting system reliability. The approach emphasized careful testing and documentation, providing a clear migration path and maintaining user trust during namespace transitions without introducing regressions.