Simple Tic-Tac-Toe program allow for a human player play against a human have some user interface, text is fine never lose. Furthermore, it should win whenever possible Design Decisions Living Documentation Tic-Tac-Toe Architecture based on DCI MVC CleanCoders.com on Architecture SRP DRY BDD TDD names of the domain language Delivery Mechanism independent of the domain logic CLI Infrastructure Ruby 1.9.3 git Cucumber RSpec