Validating is a Laravel package that provides a trait for Eloquent models to automatically validate model attributes before saving. It integrates with Laravel's event system via an observer to trigger validation on model saving and restoring events. The package handles unique rule injection by automatically appending the model's ID to unique validation rules, supports custom validation messages, and provides methods to check validity, retrieve errors, and save with various validation behaviors (including exception throwing). The architecture is centered around the ValidatingTrait, which encapsulates validation logic, rule preparation, and validator creation, while delegating event handling to a separate observer class.