Joshua Supratman developed three core features for the ros2/rviz repository, focusing on enhancing runtime configurability and user experience. He implemented new UI properties in C++ and Qt to support seamless integration with ROS actions and services, enabling users to select, filter, and interact with these resources directly within rviz. Additionally, he extended the file picker functionality by customizing file mode selection, improving file and directory handling through CMake-driven builds. Joshua’s work addressed practical workflow needs for ROS 2 users, demonstrating depth in both interface design and backend integration, and laying a solid foundation for future extensibility in rviz.