What problem does it solve? .NET test suites accumulate duplicated setup code, copy-paste test methods, and repeated assertion patterns over time, making them hard to maintain and extend. This Skill analyzes test code to identify these structural maintainability issues and produces a report with concrete before/after refactoring suggestions. ## Core Features & Use Cases - Duplication Detection: Identifies repeated object construction, assertion patterns, and copy-paste test methods across MSTest, xUnit, NUnit, and TUnit suites. - Parameterized Test Conversion: Suggests converting near-identical test methods into DataRow, Theory, or TestCase data-driven tests. - Calibrated Reporting: Applies a 3+ occurrence threshold and filters out intentional verbosity, so only meaningful refactoring opportunities are reported with priority rankings and trade-offs. - Use Case: Point the Skill at a test project where dozens of tests each construct the same fakes and mocks; it returns a report showing which setups to extract into factory methods and which tests to collapse into parameterized cases. ## Quick Start Analyze the test files in my project for duplicated boilerplate and copy-paste test methods, then report refactoring opportunities with before and after examples.