Zijun Gu developed three core features across the inclusionAI/AReaL and ping1jing2/sglang repositories, focusing on backend reliability and user experience. He authored comprehensive bilingual documentation for online proxy mode, detailing architecture and authentication to streamline onboarding. In Python, he implemented real-time streaming responses for chat and completions endpoints, enabling faster user interactions. To ensure robustness, Zijun expanded unit test coverage for sampling modules and conversation parsing, applying test-driven development and system architecture principles. His work emphasized API design, authentication mechanisms, and thorough documentation, resulting in improved maintainability, operational resilience, and a smoother developer experience for both projects.