During November 2024, Mousy597 focused on backend development and device management for the comfyanonymous/ComfyUI repository, addressing a nuanced issue in multi-GPU environments. They delivered a targeted bug fix in Python that improved cross-vendor CUDA device handling, specifically for AMD/HIP hardware. By ensuring both CUDA_VISIBLE_DEVICES and HIP_VISIBLE_DEVICES are set when the --cuda-device flag is used, Mousy597 enhanced device selection reliability and reduced misconfiguration risks for users with AMD GPUs. This work demonstrated a strong grasp of environment configuration and debugging, aligning device assignment behavior with user expectations and contributing to a smoother onboarding experience for new users.