In April 2025, Steve Kagan focused on enhancing Python-C interoperability within the amzn/rdma-core repository. He addressed a critical compatibility issue by updating the pyverbs module to support Cython 3.x, specifically by changing the PD object’s return type to uintptr_t. This adjustment aligned object pointer semantics with the expectations of Cython 3.x, preventing potential runtime errors and ensuring stable integration between Python and C components. Steve’s work demonstrated depth in low-level programming and Python C extensions, applying his expertise in Cython to resolve nuanced interoperability challenges and maintain the reliability of the codebase during evolving language transitions.