Luke Nguyen focused on backend stability and API correctness for the janhq/cortex.cpp repository, addressing two critical bugs over the course of a month. He corrected the engine unload API to use the DELETE method, aligning with RESTful standards and reducing the risk of client misuse. To maintain reliable continuous integration, Luke stabilized the test suite by disabling unit tests affected by the removal of a HuggingFace model dependency, preventing false failures during builds. His work leveraged C++ and CI/CD practices, emphasizing robust API development and test reliability. The depth of his contributions improved maintainability and ensured smoother development workflows.