In August 2025, Alex contributed to the rapidsai/cuvs repository by developing a public API for CAGRA graph optimization that supports host memory inputs. This work involved designing a new C++ API header and updating the implementation to operate on host matrices, enabling users to optimize KNN graphs into CAGRA search graphs using host-based data. Alex also created unit tests to validate the usability and correctness of the host memory workflow, ensuring robust integration and improved test coverage. The project demonstrated skills in C++ API development, CUDA integration, and graph optimization, addressing usability for host-memory workflows without major bug fixes.