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docs: add advanced skills for Vitest, Pinia, and Vue built-ins 
Add comprehensive reference documentation for:
- Vitest: environments, projects/workspaces, type testing, vi utilities
- Pinia: HMR, Nuxt integration, SSR setup
- Vue: built-in components (Transition, Teleport, Suspense, KeepAlive) and advanced directives
2026-04-11 16:28:36 +01:00

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name, description, metadata
name description metadata
pinia 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.
author version source
Anthony Fu 2026.1.28 Generated from https://github.com/vuejs/pinia, scripts located at https://github.com/antfu/skills

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

Features

Extensibility

Topic Description Reference
Plugins Extend stores with custom properties, state, and behavior features-plugins

Composability

Topic Description Reference
Composables Using Vue composables within stores (VueUse, etc.) features-composables
Composing Stores Store-to-store communication, avoiding circular dependencies features-composing-stores

Best Practices

Topic Description Reference
Testing Unit testing with @pinia/testing, mocking, stubbing best-practices-testing
Outside Components Using stores in navigation guards, plugins, middlewares best-practices-outside-component

Advanced

Topic Description Reference
SSR Server-side rendering, state hydration advanced-ssr
Nuxt Nuxt integration, auto-imports, SSR best practices advanced-nuxt
HMR Hot module replacement for development advanced-hmr

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