The Chef Development Kit contains everything you need to start using Chef, along with the tools essential to managing the code that runs your business. ChefDK contains: Chef CLI for managing policy files and generating cookbooks. The well-known cookbook dependency manager Berkshelf. The Test Kitchen integration testing framework. ChefSpec, which makes unit testing cookbooks a breeze. Foodcritic, a linting tool for doing static code analysis on cookbooks. All of the Chef tools you're already familiar with: Chef Client, Knife, Ohai and Chef Zero.