The highly reactive build tool!
sbt is a build tool focused on providing the best development experience possible. It offers a highly interactive style of development, with customizable build tasks and "execute-on-change" features that allow you to simply focus on writing your code.
and start coding! Test failures will show up in sbt's console automatically as your code is saved.
sbt is the default build tool for the Play Framework and Typesafe Activator, and was created by Typesafe Engineer, Mark Harrah.