Extreme Programming does not mean programming naked while rollerblading down the side of the Grand Canyon. It does mean a new approach to software development that is both radical and common-sense. Unlike many software development methodologies, XP has been accepted quickly because its core practices–particularly code sharing, test-first development, and continuous integration–resonated immediately with software developers everywhere. Instead of impressing developers with a body of theory, XP got programmers to say, “Yeah, that’s how I’d like to work.”