GitHub is introducing a redesigned interface for repositories that enhances navigation and page layout while improving underlying code and performance. Over the next two weeks, users can opt-in to this new design via a button in their repositories before it becomes the default. Key changes include a collapsing side menu replaced by a persistent top navigation bar, improving accessibility and coherence while allowing users to see tab labels without tooltips. The Code tab now highlights cloning with a redesigned protocol switcher, offering explicit menu items with descriptive text. The new layout provides additional horizontal space, making issues and pull requests easier to manage with a more readable sidebar. These updates aim to help users focus on their content and ensure a smooth transition by initially offering the design as optional before automatic implementation.