During August 2025, this developer contributed to the OpenXiangShan-Nanhu/Nanhu-V5 repository by addressing a critical stability issue in the prefetch subsystem. They identified and resolved a bug related to register initialization in the l1_array and l2_array prefetch registers, ensuring these were set to default states to prevent uninitialized and x-state errors. Working primarily in Scala and applying hardware design and register initialization expertise, the developer delivered a focused, maintainable patch that improved runtime reliability under memory-intensive workloads. Their work demonstrated careful low-level debugging and precise code changes, resulting in a more robust prefetching mechanism for the project.