Worked on enhancing GPU-path reliability and mask operations in the comfyanonymous/ComfyUI repository, focusing on resolving device mismatch issues in SolidMask and MaskComposite nodes. Addressed a critical bug by aligning device handling across masking nodes, ensuring that operations under the --gpu-only flag consistently use the correct GPU device. The solution involved eliminating hardcoded CPU paths and standardizing device management with intermediate_device(), which improved runtime stability and GPU throughput. Collaborated closely with other contributors to harden the GPU execution path. Utilized deep learning techniques, GPU programming, and Python to deliver a more robust and reliable masking pipeline for GPU-accelerated workflows.