During July 2025, Harold focused on backend development and image processing, addressing a critical bug in the girder/large_image repository. He identified and resolved an issue in the large-image tiling pipeline where improper padding could cause data loss or misalignment during tile generation. Using Python, Harold implemented a targeted patch that ensures tile padding accounts for both expected and actual dimensions, preserving data integrity across edge cases. This low-risk fix improved the robustness and reliability of the image tiling workflow, enhancing downstream rendering processes. His work demonstrated careful attention to edge conditions and contributed measurable stability to the core pipeline.