During November 2024, Mousy597 contributed to the comfyanonymous/ComfyUI repository by addressing a complex device management issue affecting users with AMD GPUs. Using Python and backend development expertise, Mousy597 implemented a targeted bug fix that ensured both CUDA_VISIBLE_DEVICES and HIP_VISIBLE_DEVICES environment variables were correctly set when the --cuda-device flag was used. This change improved cross-vendor compatibility and made device selection more reliable for multi-GPU environments. By aligning device assignment behavior with user expectations and reducing misconfiguration risks, Mousy597 enhanced the onboarding experience and contributed to smoother support processes, demonstrating strong debugging and environment configuration skills throughout the process.