Freezed Guide (v3.2.x)

Goal

Generate immutable data classes, union types, and deep copyWith using Freezed v3.2.x. Complements Dart 3 sealed classes by adding copyWith, ==/hashCode, and JSON serialization via json_serializable.

Instructions

1. Dependencies and Environment Setup

Because Freezed relies heavily on code generation, ensure your pubspec.yaml is fully configured:

dependencies:
  freezed_annotation: ^3.2.5
  json_annotation: ^4.11.0 # If mutual conversion with JSON is required