Shiqi Zhang contributed to the glotzerlab/hoomd-blue repository by addressing a critical issue in Hard Particle Monte Carlo (HPMC) energy calculations. Using C++ and leveraging expertise in high-performance computing and molecular dynamics, Shiqi implemented a targeted fix to ensure that energy contributions are computed only when a selected particle pair exists and their distance falls within the cutoff. This adjustment eliminated spurious energy terms, improving the physical accuracy and stability of simulation results. The work demonstrated careful attention to numerical correctness and maintainability, enhancing the reliability of scientific conclusions drawn from HOOMD-blue’s HPMC simulations during the development period.