effect

Explain Effect library core concepts, types, and primitives for TypeScript.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/lucas-barake/dotai --skill effect
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: effect
Source: https://github.com/lucas-barake/dotai/tree/main/canonical/skills/effect
Command: npx skills add https://github.com/lucas-barake/dotai --skill effect

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This reference provides a comprehensive guide to understanding and applying the Effect library's core concepts, types, and primitives for building safe, composable, and concurrent functional code in TypeScript.

Core Features & Use Cases

  • Immutability guidelines and type-safe patterns for Effect-based code.
  • Detailed coverage of Effect.fn, Effect.gen, and Effect.Service usage, along with Context.Tag and Data.Class.
  • Practical guidance on concurrency primitives (Deferred, Ref, Semaphore, Latch, Queue) and data modeling (Schema, Exit, Cause) plus Stream integration.
  • Real-world use cases like composing robust effect pipelines, fault-tolerant services, and scalable data flows.

Quick Start

Create a simple effect that logs a message and then composes it with another effect to demonstrate basic usage.

Frequently Asked Questions about effect

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build composable functional pipelines in TypeScript using the Effect library?

You can build composable functional pipelines in TypeScript using the Effect library by leveraging Effect.fn, Effect.gen, and Flow-based composition with pipe and flow to structure robust, sequential data transformations.

What is the best way to manage concurrency and error handling in TypeScript Effect?

The best way to manage concurrency and error handling in TypeScript Effect is by using primitives like Deferred, Ref, Semaphore, Latch, and Queue, alongside Exit and Cause for modeling data and capturing failures reliably.

How do I define type-safe services and context in Effect for TypeScript applications?

You define type-safe services and context in Effect for TypeScript applications by utilizing Effect.Service and Context.Tag to create composable, fault-tolerant service layers within your functional architecture.

Can I integrate streams into Effect pipelines for scalable data flows in TypeScript?

Yes, you can integrate streams into Effect pipelines for scalable data flows in TypeScript by applying the Stream primitive alongside Effect.gen to handle continuous data processing and concurrent functional pipeline composition.

When should I use Data.Class and Schema for type-safe data modeling in Effect?

You should use Data.Class and Schema for type-safe data modeling in Effect when you need to enforce immutability guidelines and structure strict data contracts within your TypeScript functional pipelines.

Does functional programming with Effect require specific TypeScript environment setup?

Functional programming with Effect requires a standard TypeScript environment configured for advanced type-checking, allowing you to immediately implement immutable patterns and core primitives without external dependencies.