What is the difference between Ref and SynchronizedRef?

Ref is for simple atomic updates that don't require side effects, while SynchronizedRef allows for updates that involve running effects, such as API calls or logging.

Can I use these primitives for global state?

Yes, these primitives are frequently used within Effect Services and Layers to manage shared, injectable state across a TypeScript application.

Is state management in Effect thread-safe?

Yes, all Effect state primitives are fiber-safe and designed to work correctly with concurrent access, preventing race conditions automatically.

When should I use SubscriptionRef?

Use SubscriptionRef when you need to provide a stream of state changes to other parts of your application, enabling reactive programming patterns.

Effect State Management

Name: Effect State Management
Author: andrueandersoncs

byandrueandersoncs

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API Development

Manages functional mutable state using Effect's fiber-safe primitives like Ref, SynchronizedRef, and SubscriptionRef.

This skill empowers developers to handle complex state logic within the Effect ecosystem by providing standardized patterns for mutable references. It covers basic atomic updates with Ref, asynchronous effectful updates with SynchronizedRef, and reactive state change notifications using SubscriptionRef. By leveraging these primitives, developers can ensure thread-safety, concurrency control, and predictable state transitions in their TypeScript applications without sacrificing functional purity. It is particularly useful for building services, state machines, and reactive configuration systems.

Key Features

01Atomic state updates with Ref for fiber-safe concurrency

023 GitHub stars

03Reactive state monitoring via SubscriptionRef streams

04Implementation patterns for State Machines and Accumulators

05Effectful state transitions using SynchronizedRef for async logic

06Best practices for thread-safe shared mutable state

Use Cases

01Managing async cache invalidation and updates via SynchronizedRef

02Building a thread-safe counter or service with internal state

03Implementing a reactive configuration system that notifies subscribers of changes

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add andrueandersoncs/claude-skill-effect-ts state-management

For use in Claude.ai and ChatGPT

Download Skill