SvelteKit Auth is a new authentication library built on top of the @auth/core decoupled library, marking the larger move to Auth.js, providing authentication for the Web with any framework you like. The package was created as an extension of NextAuth.js, which has almost 300,000 npm downloads per week and supports the entire ecosystem of frontend frameworks. SvelteKit Auth is designed to be a simple, low-configuration authentication solution that supports many popular OAuth platforms like Google, Facebook, GitHub, and more. It allows users to sign in and sign out on user actions, providing helpful methods for authentication management. The library is still experimental but has the potential to expand Auth.js into other frontend frameworks besides Next.js, with a growing community of contributors and sponsors supporting its development.