Yang Li worked on the sinelaw/fresh repository, focusing on stabilizing the rendering process when cursors are hidden in Rust-based back end systems. By refining the logic in split_rendering.rs, Yang addressed a panic that occurred when rendering buffers with hidden cursors, ensuring the application no longer crashed in scenarios such as File Explorer. To prevent future regressions, Yang expanded test coverage by adding a dedicated regression test and exposing handle_plugin_command for integration testing. This work demonstrated depth in both Rust and back end development, emphasizing robust error handling and proactive test infrastructure to maintain stability and improve user experience.