Zustand State Management

What it does

When your agent uses it

• Redux/Context API migration
• LocalStorage persistence
• Encountering hydration errors
• TypeScript inference issues

Example prompts

• “/zustand-state-management”

Requirements

• Node.js
• A Bash shell

Workflow steps

3 steps, taken from the step headings in SKILL.md.

1. 1Install Zustand
2. 2Create Your First Store (TypeScript)
3. 3Use Store in Components

What it can do on your machine

Read from SKILL.md and the folder at commit 8837836. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 2 files in scripts/ (TypeScript and Shell, from the files we listed), which the agent can run.

  Shell commands in SKILL.md call:

  • bun

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • zustand.docs.pmnd.rs
  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Zustand State Management loads about 2.5k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 77 tokens; SKILL.md has 660 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~77

When it runs · the whole SKILL.md, loaded when a task matches

~2.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~13k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from secondsky/claude-skills at commit 8837836, republished under its MIT licence (© secondsky). 660 words, ~2,484 tokens.

name

zustand-state-management

description

Zustand state management for React with TypeScript. Use for global state, Redux/Context API migration, localStorage persistence, slices pattern, devtools, Next.js SSR, or encountering hydration errors, TypeScript inference issues, persist middleware problems, infinite render loops.

metadata.keywords

zustand, state management, React state, TypeScript state, persist middleware, devtools, slices pattern, global state, React hooks, create store…

license

MIT

bun add zustand  # preferred
# or: npm install zustand
# or: yarn add zustand

import { create } from 'zustand'

interface BearStore {
  bears: number
  increase: (by: number) => void
  reset: () => void
}

const useBearStore = create<BearStore>()((set) => ({
  bears: 0,
  increase: (by) => set((state) => ({ bears: state.bears + by })),
  reset: () => set({ bears: 0 }),
}))

import { useBearStore } from './store'

function BearCounter() {
  const bears = useBearStore((state) => state.bears)
  return <h1>{bears} around here...</h1>
}

function Controls() {
  const increase = useBearStore((state) => state.increase)
  return <button onClick={() => increase(1)}>Add bear</button>
}

import { create } from 'zustand'

const useStore = create((set) => ({
  count: 0,
  increment: () => set((state) => ({ count: state.count + 1 })),
  decrement: () => set((state) => ({ count: state.count - 1 })),
}))

import { create } from 'zustand'

// Define store interface
interface CounterStore {
  count: number
  increment: () => void
  decrement: () => void
}

// Create typed store
const useCounterStore = create<CounterStore>()((set) => ({
  count: 0,
  increment: () => set((state) => ({ count: state.count + 1 })),
  decrement: () => set((state) => ({ count: state.count - 1 })),
}))

import { create } from 'zustand'
import { persist, createJSONStorage } from 'zustand/middleware'

interface UserPreferences {
  theme: 'light' | 'dark' | 'system'
  language: string
  setTheme: (theme: UserPreferences['theme']) => void
  setLanguage: (language: string) => void
}

const usePreferencesStore = create<UserPreferences>()(
  persist(
    (set) => ({
      theme: 'system',
      language: 'en',
      setTheme: (theme) => set({ theme }),
      setLanguage: (language) => set({ language }),
    }),
    {
      name: 'user-preferences', // unique name in localStorage
      storage: createJSONStorage(() => localStorage), // optional: defaults to localStorage
    },
  ),
)

// ❌ WRONG: create<T>((set) => ...)
// ✅ CORRECT: create<T>()((set) => ...)

import { create } from 'zustand'
import { devtools, persist } from 'zustand/middleware'

const useStore = create<MyStore>()(
  devtools(
    persist(
      (set) => ({ /* store definition */ }),
      { name: 'my-storage' },
    ),
    { name: 'MyStore' },
  ),
)

{ "dependencies": { "zustand": "^5.0.14", "react": "^18.0.0+" } }

© secondsky, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 19 other files (scripts, references, assets) in plugins/zustand-state-management/skills/zustand-state-management of secondsky/claude-skills.

• SKILL.md
• assets/example-template.txt
• references/advanced-topics.md
• references/common-patterns.md
• references/example-reference.md
• references/known-issues.md
• references/middleware-guide.md
• references/migration-guide.md
• references/nextjs-hydration.md
• references/typescript-patterns.md
• scripts/check-versions.sh
• scripts/example-script.sh
• templates/async-actions-store.ts
• templates/basic-store.ts
• templates/computed-store.ts
• templates/devtools-store.ts
• templates/nextjs-store.ts
• … and 3 more

Open the folder on GitHubat commit 8837836