The principles of Extreme Programming (XP) focus on improving software quality and responsiveness to changing customer requirements. The key principles include: * Rapid feedback: Getting feedback quickly from customers or stakeholders to ensure that the development process is on track. * Assume simplicity: Focusing on simplicity in the design and code to avoid overengineering and to ensure the software is easy to understand and modify. * Incremental change: Delivering software in small, manageable increments that can be easily adjusted based on feedback. * Embrace change: Being flexible and adaptable, especially in response to new requirements or changes in technology or business needs. * Quality work: Ensuring high-quality software by emphasizing practices such as automated testing, continuous integration, and refactoring.