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Pinia stores, Vue 3 state patterns. Use when managing client state in Vue applications, choosing between Options/Setup stores, composing stores, or implementing persistence.
Redux Toolkit patterns for complex client state. Use when managing enterprise-scale state, needing DevTools, entity normalization, or RTK Query for data fetching.
Zustand stores, client state patterns. Use when deciding between Zustand vs useState, managing global state, or avoiding Context misuse.
Class Variance Authority - type-safe component variant styling with cva(), compound variants, and VariantProps
Tailwind CSS v4 - utility-first CSS framework with CSS-first configuration
Live web-app verification β drive real browser flows via Playwright MCP, assert console and network health
Live web-app verification β drive real browser flows via Playwright MCP, assert console and network health
Cypress E2E testing patterns - test structure, data-cy selectors, cy.intercept() mocking, custom commands, fixtures, component testing, accessibility testing with cypress-axe, and CI/CD integration
Playwright E2E testing patterns - test structure, Page Object Model, locator strategies, assertions, network mocking, visual regression, parallel execution, fixtures, and configuration
React Testing Library patterns - query hierarchy, userEvent, async utilities, renderHook, custom render with providers, accessibility-first testing
Vitest test runner - configuration, assertions, mocking (vi.fn, vi.mock, vi.spyOn), fake timers, snapshot testing, coverage, workspace projects
Vue Test Utils patterns - mount, shallowMount, wrapper API, trigger, setValue, flushPromises, testing composables, Pinia store mocking
Storybook patterns - CSF 3.0, args, controls, autodocs, play functions, interaction testing, visual testing, addons configuration
Vite config, path aliases, vendor chunk splitting, environment-specific builds, Rolldown codeSplitting, Sass modern API, build targets, module preload
Mantine v7 component library β theming, styling, hooks, forms, notifications
shadcn/ui component library patterns, CLI usage, theming, customization
TanStack Table v8 patterns - useReactTable, column definitions, sorting, filtering, pagination, row selection, virtual scrolling, server-side data
date-fns patterns for TypeScript - formatting, parsing, manipulation, comparison, timezone handling, and internationalization
Modern native JavaScript (ES2022-ES2025) utility patterns that replace lodash
Reactive programming with RxJS - Observables, operators, Subjects, error handling, and memory leak prevention
VueUse composable utility collection for Vue 3 - browser, sensor, network, state, animation, and component utilities
Automated testing for web applications using Python Playwright. Server lifecycle management, DOM inspection, and visual testing.