During September 2025, Jianan Wang enhanced the PyTorch repository by improving documentation for the CUDA and MTIA device APIs. Focusing on developer usability, Wang authored detailed Python docstrings for the check_error and is_bf16_supported functions, clarifying their behavior and error handling for contributors working with device-related features. This work aligned the documentation with PyTorch’s established codebase conventions and docstring standards, ensuring consistency and reducing ambiguity for new and existing developers. By prioritizing clear guidance and comprehensive API documentation, Wang’s contributions aimed to streamline onboarding, facilitate smoother integration, and minimize support requests, demonstrating a focused approach to developer experience and maintainability.