During August 2025, this developer contributed to the OpenXiangShan-Nanhu/Nanhu-V5 repository by addressing a critical stability issue in the prefetch subsystem. They focused on hardware design and register initialization, using Scala to implement a targeted fix that initialized the l1_array and l2_array prefetch registers to default states. This change reduced the risk of uninitialized and x-states in the prefetch logic, directly improving runtime reliability under memory-intensive workloads. The work demonstrated careful low-level debugging and precise code modification, resulting in a maintainable patch that enhanced the stability of the prefetching mechanism without introducing new features during the period.