Vishal Goyal contributed to both the EbookFoundation/free-programming-books and Lightning-AI/pytorch-lightning repositories, focusing on reliability and security improvements. In the free-programming-books project, he enhanced the accuracy of the SQL resource catalog by removing a broken Essential SQL link, applying careful content management using Markdown. For pytorch-lightning, Vishal introduced a weights_only option to Fabric.load() and Fabric.load_raw(), restricting checkpoint loading to primitive state_dicts for safer workflows when handling untrusted sources. This work involved backend development, updates to Python method signatures, comprehensive documentation, and unit testing, resulting in cleaner APIs and improved user confidence in resource quality and machine learning security.