effect-v4-services

To build Effect v4 services, define your service using ServiceMap.Service and compose it with Layer.effect. This modern pattern replaces Context.Tag, providing type-safe boundaries and explicit dependency management across your application.

Replace Context.Tag with ServiceMap.Service to leverage modern, type-safe service construction in Effect v4. This migration improves maintainability and provides typed error channels through TaggedErrorClass.

Add typed error channels to an Effect service by utilizing TaggedErrorClass during service construction. This ensures type-safe error handling and explicit dependency management at composition boundaries.

The best way to compose layers in Effect v4 is using Layer.effect for wiring services. Combine this with Effect.fn for reusable helpers to ensure explicit dependency management at composition boundaries.

Yes, you can refactor an existing codebase to adopt Effect v4 service patterns. The process involves migrating from Context.Tag to ServiceMap.Service and updating layer composition to utilize Layer.effect.

You need explicit dependency management in Effect layers when composing services at composition boundaries. Using Layer.effect and ServiceMap.Service ensures that dependencies are type-safe and correctly wired during service construction.