During April 2025, Tzu-Mao Li contributed to the halide/Halide repository by addressing a critical bug in the IR equality checking logic. He focused on improving the correctness of the graph_equal() function within IREquality.h, ensuring that the dispatch mechanism accurately differentiated between statements and expressions during comparison. This targeted fix, implemented in C++, involved a concise code update that resolved potential issues with incorrect graph comparisons, thereby enhancing the reliability of downstream optimizations. Tzu-Mao demonstrated strong debugging and risk-managed code review skills, delivering a precise solution that improved the robustness of Halide’s intermediate representation analysis without introducing new features.