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Installation

npm install @devtools/core

React 19 and React DOM 19 are peer dependencies — install them if your project doesn't already have them:

npm install react@^19 react-dom@^19

Next.js​

If you're using Next.js (Pages Router, App Router, or both), also install the adapter:

npm install @devtools/next

@devtools/next depends on @devtools/core and next (^15.0.0 || ^16.0.0) as peer dependencies. See SSR & Next.js once you have a store defined.

Not using Next.js?​

You don't need @devtools/next at all. @devtools/core on its own works in any React app — Create React App, Vite, a plain client-rendered SPA. Wrap your app in a <NekutaStore> and start defining stores.

Optional: enforcing one store style​

@devtools/eslint-plugin lints for a single defineStore() style across your project — see Enforcing a Store Style.

npm install --save-dev @devtools/eslint-plugin