valtio

Manage React and non-React state with proxy-based mutable stores.

Updated Apr 12, 2026
One-click install
npx skills add https://github.com/gil00pita/lanify --skill valtio-gil00pita
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: valtio
Source: https://github.com/gil00pita/lanify/tree/main/.agents/skills/valtio
Command: npx skills add https://github.com/gil00pita/lanify --skill valtio-gil00pita

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Valtio provides proxy-based state management that lets you write mutations directly on a proxy store while React observes and re-renders only the parts that changed.

Core Features & Use Cases

  • Proxy-based state management that makes React state feel like plain JavaScript.
  • Readable, efficient reactivity via useSnapshot and subscribe, with updates that occur only when accessed properties change.
  • Works with or without React, enabling state management in non-UI logic, data stores, and utilities.

Quick Start

Install valtio, create a proxy store, and use useSnapshot to read and react to changes.

Frequently Asked Questions about valtio

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

FAQPage Schema
How does proxy-based state management work in React?▼

Proxy-based state management uses JavaScript proxies to let you mutate state directly while React observes changes and triggers fine-grained re-renders only for components accessing the modified properties.

How do I create a mutable store and read its state?▼

Create a mutable store using the proxy utility, then read state via the useSnapshot hook in React components or the subscribe function in non-UI JavaScript contexts to observe property changes.

Can I use this state management approach outside of React?▼

Yes, this proxy-based state management works with or without React. You can manage state in non-UI logic, data stores, and utilities using the subscribe or watch utilities to observe changes.

What is the best way to prevent unnecessary re-renders when managing mutable state?▼

To prevent unnecessary re-renders with mutable state, use selective subscriptions via useSnapshot. This ensures React components only update when the specific properties they access actually change.

How do I compute derived values from a proxy store?▼

You can derive computed values from a proxy store by using the watch utility or subscribe function to observe state changes and automatically recalculate derived data when accessed properties mutate.

Do I need any specific dependencies to use valtio for state management?▼

No external dependencies are required. You only need to install valtio itself to create proxy stores and use hooks like useSnapshot or utilities like subscribe to handle reactivity.