Effect

Use when @effect/schema patterns including schema definition, validation, parsing, encoding, and transformations. Use for type-safe data validation in Effect applications.

Use when testing Effect code including Effect.gen in tests, test layers, mocking services, and testing error scenarios. Use for writing tests for Effect applications.

Use when Effect concurrency patterns including fibers, fork, join, parallel execution, and race conditions. Use for concurrent operations in Effect applications.

Use when Effect core patterns including Effect<A, E, R> type, succeed, fail, sync, promise, and Effect.gen for composing effects. Use for basic Effect operations.

Use when Effect error handling patterns including catchAll, catchTag, either, option, and typed errors. Use for handling expected errors in Effect applications.

Use when Effect resource management patterns including Scope, addFinalizer, scoped effects, and automatic cleanup. Use for managing resources in Effect applications.

Use when Effect dependency injection patterns including Context, Layer, service definitions, and dependency composition. Use for managing dependencies in Effect applications.