Danger is a tool that automates common code review chores during the CI process, allowing teams to codify their norms and leave humans to think about harder problems. To set up Danger, Bundler needs to be installed and added to the Gemfile, then the Danger gem needs to be installed and initialized. The Gemfile and Gemfile.lock need to be committed to the repository, and a new Bot user and Personal Access Token are created on GitHub for projects that require them. Danger can be set up on Bitrise by adding the token as an environment variable and running a script step after tests. Examples of using Danger include marking Work In Progress pull requests, checking for release notes changes, listing build artifacts, and more.