Sapling: Source control that’s user-friendly and scalable

Emotional, Burning, Unlimited Tuned Laboratory

Sapling is a new Git-compatible source control client.
Sapling emphasizes usability while also scaling to the largest repositories in the world.
ReviewStack is a demonstration code review UI for GitHub pull requests that integrates with Sapling to make reviewing stacks of commits easy.

Source control is one of the most important tools for modern developers, and through tools such as Git and GitHub, it has become a foundation for the entire software industry. At Meta, source control is responsible for storing developers’ in-progress code, storing the history of all code, and serving code to developer services such as build and test infrastructure. It is a critical part of our developer experience and our ability to move fast, and we’ve invested heavily to build a world-class source control experience.