In February 2026, Shiverin Zhang developed a per-user chatbot experience for the source-academy/backend and source-academy/frontend repositories, focusing on robust conversation management and interactive features. He implemented logic in Elixir and the Phoenix framework to enforce a single active conversation per user, introducing explicit error handling and null-safety to improve reliability. On the frontend, he used React and TypeScript to deliver interactive code snippets, UUID-based message tracking, and refined chat initialization, enhancing both usability and performance. His work included comprehensive test updates to validate error paths and edge cases, demonstrating depth in both backend and frontend engineering within a short timeframe.