Dart 3 Updates Skill

Apply Dart 3 language features — branches, patterns, pattern types, and records — correctly and idiomatically.

When to Use

Use this skill when:

• Writing or refactoring switch statements or if-else chains.
• Creating new data-holding classes and deciding between sealed classes, records, or plain classes.
• Destructuring values from maps, lists, records, or objects.
• Modernizing pre-Dart-3 code to use patterns, exhaustiveness checks, or switch expressions.

1. Branches

if / if-case