The idea is simply this: I take my pipeline and make the final step—deployment to production—automatic. That way, if a check-in passes all the automated tests, it gets deployed directly to production. In order for this not to cause breakages, your automated tests have to be fantastic—there should be automated unit tests, component tests, and acceptance tests (functional and nonfunctional) covering your entire application. You have to write all your tests—including acceptance tests—first, so that only when a story is complete will check-ins pass the acceptance tests.
