Migrating Dart Tests to Package Checks Use this skill when you need to migrate a Dart test suite from the legacy (which is exported by default from ) to the modern, type-safe, and literate assertion library. Contents - When to Use This Skill - How to Use This Skill (The Workflow) - Key Syntax Differences and Pitfalls - Matcher-to-Checks Mapping Table - Matchers with No Direct Replacements - Strategies for Discovery - Examples --- When to Use This Skill - When asked to "migrate tests to checks", "use package:checks", or "modernize test assertions". - When updating legacy test suites where stat…