Design and compose Effect layers for TypeScript dependency management.
npx skills add https://github.com/front-depiction/claude-setup --skill layer-design
Please help me install this Agent Skill. Skill: layer-design Source: https://github.com/front-depiction/claude-setup/tree/main/skills/layer-design Command: npx skills add https://github.com/front-depiction/claude-setup --skill layer-design
Designing scalable applications with explicit, maintainable dependency graphs can be complex. This Skill provides proven patterns and examples for building and composing Effect layers in TypeScript, making dependencies and resource lifecycles clear and testable.
Define a few sample layers (for example Config and Logger), combine them with Layer.merge, and then provide dependencies to build a runnable program. Replace the sample services with real implementations as you move from example to production.
High-intent search queries and answers about installing and using this skill.
You design clean dependency layers in TypeScript by using Effect's Layer APIs to structure, merge, and provide dependencies. This approach separates infrastructure, domain, and application concerns, making your dependency graphs explicit, testable, and maintainable.
The best way to manage resource lifecycles in Effect is using Layer.scoped. It handles acquisition and release semantics automatically, ensuring resources are safely allocated and cleaned up when the layer is no longer needed.
Layer.merge combines multiple Effect layers into a single unified layer. It takes independent dependencies, like a Config layer and a Logger layer, and aggregates their outputs so they can be provided together across application boundaries.
Yes, you need prior knowledge of the Effect library and TypeScript typing. Designing these dependency layers requires understanding Layer APIs including Layer.succeed, Layer.effect, Layer.scoped, Layer.merge, and Layer.provide.
Use Layer.effect when creating a dependency requires an Effect workflow, such as reading configuration or performing asynchronous setup. Use Layer.succeed when you have a static, already-constructed service instance to provide directly.
You provide dependencies to build a runnable Effect program by using Layer.provide. This feeds merged dependency layers into your application's main workflow, replacing sample or mock services with real production implementations at app boundaries.
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