Effect Core Patterns

Master the core Effect patterns for building type-safe, composable applications with Effect. This skill covers the Effect type, constructors, and composition patterns using Effect.gen.

The Effect Type

The Effect type has three type parameters:

Effect<Success, Error, Requirements>

• Success (A): The type of value that an effect can succeed with
• Error (E): The expected errors that can occur (use never for no errors)
• Requirements (R): The contextual dependencies required (use never for no dependencies)