Rationale
Naming conventions promote consistency in your app and make the code easier to read and understand.
Scope
Apex classes
Configurations
Pattern. Use a regular expression to define the validation pattern for your class names.
Hint. Add a hint to be displayed when a detection is flagged, in order to give developers a tangible example of a name that suits naming convention. (Warning: the hint is not validated, make sure it matches your validation pattern before adding it).
Exclusions
This rule will not fire on test classes