effect-ts-testing

Use this skill when the user asks about "Effect testing", "@effect/vitest", "it.effect", "it.live", "it.scoped", "it.layer", "it.prop", "Schema Arbitrary", "property-based testing", "fast-check", "TestClock", "testing effects", "mocking services", "test layers", "TestContext", "Effect.provide test", "time testing", "Effect test utilities", "unit testing Effect", "generating test data", "flakyTest", "test coverage", "100% coverage", "service testing", "test doubles", "mock services", or needs to understand how to test Effect-based code.