Lucien worked on the zephyrproject-rtos/openthread repository, focusing on improving the reliability of CoAP message matching in embedded systems. Addressing a nuanced issue in network protocols, Lucien refined the matching logic to distinguish between multicast, anycast, and unicast traffic. For multicast and anycast, the solution matched messages using destination address and port, while restricting token-based matching to unicast scenarios. This approach enhanced the robustness of request-response handling across diverse network topologies. The work, implemented in C++ and leveraging expertise in CoAP and embedded systems, demonstrated a thoughtful understanding of protocol behavior and contributed depth to the project’s networking layer.