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Vue · Frontend / AGENT SKILL
pinia
0
Implement type-safe Vue state management with Pinia stores, getters, and actions.
Pinia official Vue state management library, type-safe and extensible. Use when defining stores, working with state/getters/actions, or implementing store patterns in Vue apps.
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# Pinia Pinia is the official state management library for Vue, designed to be intuitive and type-safe. It supports both Options API and Composition API styles, with first-class TypeScript support and devtools integration. > The skill is based on Pinia v3.0.4, generated at 2026-01-28. ## Core References | Topic | Description | Reference | |-------|-------------|-----------| | Stores | Defining stores, state, getters, actions, storeToRefs, subscriptions | [core-stores](references/core-stores.md) | ## Features ### Extensibility | Topic | Description | Reference | |-------|-------------|-----------| | Plugins | Extend stores with custom properties, state, and behavior | [features-plugins](references/features-plugins.md) | ### Composability | Topic | Description | Reference | |-------|-------------|-----------| | Composables | Using Vue composables within stores (VueUse, etc.) | [features-composables](references/features-composables.md) | | Composing Stores | Store-to-store communication, avoiding circular dependencies | [features-composing-stores](references/features-composing-stores.md) | ## Best Practices | Topic | Description | Reference | |-------|-------------|-----------| | Testing | Unit testing with @pinia/testing, mocking, stubbing | [best-practices-testing](references/best-practices-testing.md) | | Outside Components | Using stores in navigation guards, plugins, middlewares | [best-practices-outside-component](references/best-practices-outside-component.md) | ## Advanced | Topic | Description | Reference | |-------|-------------|-----------| | SSR | Server-side rendering, state hydration | [advanced-ssr](references/advanced-ssr.md) | | Nuxt | Nuxt integration, auto-imports, SSR best practices | [advanced-nuxt](references/advanced-nuxt.md) | | HMR | Hot module replacement for development | [advanced-hmr](references/advanced-hmr.md) | ## Key Recommendations - **Prefer Setup Stores** for complex logic, composables, and watchers - **Use `storeToRefs()`** when destructuring state/getters to preserve reactivity - **Actions can be destructured directly** - they're bound to the store - **Call stores inside functions** not at module scope, especially for SSR - **Add HMR support** to each store for better development experience - **Use `@pinia/testing`** for component tests with mocked stores