Clean Code` is a classification system that focuses exclusively on code, aims to classify nonconformities based on actual code properties rather than potential consequences, and encompasses four categories: consistent, intentional, adaptable, and responsible. The `Consistent` category emphasizes consistency in style, idiomatic syntax, and readability, while the `Intentional` category highlights clear and unambiguous instructions, logical soundness, thoroughness, and efficiency. The `Adaptable` category focuses on minimizing duplication, focusing units to a specific scope, and using encapsulation techniques. Finally, the `Responsible` category addresses ethical considerations such as avoiding hard-coding secrets, respecting laws and licensing regulations, and promoting inclusivity. This classification system is intended to provide a solid foundation for Clean Code, with the goal of gradually rolling it out in Sonar products and classifying issues based on actual code properties rather than potential consequences.