Kuanyu Lu focused on stabilizing and improving the QNN Execution Provider within the mozilla/onnxruntime repository, addressing reliability issues in C++ code through targeted bug fixes and test enhancements. He re-enabled and updated unit tests to reflect changes in the QNN SDK, ensuring continued coverage of critical execution paths and reducing test flakiness. In addition, he implemented a robust mechanism for accurately determining graph input counts, updating tensor metadata to prevent execution mismatches. By applying these C++ development and software testing skills, Kuanyu enhanced the stability and correctness of QNN EP, reducing runtime errors and downstream debugging time for users.