effect-ts

Model domain data in Effect v4 by applying Schema.Class and branded types. This approach enforces type safety at compile time and uses tagged errors to handle domain failures robustly.

Yes, you can test Effect v4 services by integrating with @effect/vitest. This allows you to validate service behaviors and layer compositions directly within your existing testing environment.

The best way to handle typed errors in Effect v4 is by using tagged errors. This pattern ensures the type system tracks expected failures, allowing precise error management within your service layers.

Yes, the Skill provides practical examples for HTTP clients and CLI tooling. These patterns illustrate end-to-end usage, showing how to wire services and layers for external integrations.

You need ServiceMap.Service when building service-based TypeScript applications requiring strict interface definitions. It establishes a unique tag for dependency injection and orchestrates layers across the app.