Behat is an open-source behavior-driven development (BDD) framework for PHP, inspired by the Ruby Cucumber project. It allows developers and testers to write human-readable stories that describe the behavior of an application. These stories, written in the Gherkin language, serve as both documentation and tests that can be automated to verify an application's functionality. Behat aims to bridge communication gaps between developers, testers, and non-technical stakeholders by facilitating a shared understanding of application behavior. It is hosted on GitHub, where users can access its source code, contribute to its development, and find comprehensive documentation and community support.