effect-layer-design

What problem does it solve?

Effect layer design becomes error-prone when dependencies, resource lifecycles, and composition semantics are handled inconsistently, leading to tangled wiring and brittle services.

Core Features & Use Cases

• Layer dependency modeling: Defines services with explicit input requirements and construction errors using Effect layer types.
• Resource-safe layer construction: Uses Layer.effect with scoped lifecycle patterns, including acquireRelease-style cleanup.
• Composition strategies: Applies the right composition approach (merge vs provide vs provideMerge) to build production and test layer stacks cleanly.

Quick Start

Tell the assistant: "Create an Effect v4 layer design for a Logger service that depends on Config, using Layer.effect with correct dependency types and a defaultLayer suitable for production."