Clean Code is a methodology that emphasizes writing clean, maintainable code from the start, rather than after it's been written. The approach focuses on reducing technical debt and improving overall software quality. It involves using tools like Sonar to identify security vulnerabilities and coding mistakes early in the development process, allowing developers to address them before they become major issues. This approach is essential for cloud-native applications, which introduce new attack planes and vulnerabilities that traditional security practices may not be able to handle. By adopting a developer-first methodology like Clean as You Code, teams can shift left and identify potential security threats early on, reducing the risk of breaches and improving overall software quality.