agents-inc

Tailwind CSS v4 - utility-first CSS framework with CSS-first configuration

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Vitest test runner - configuration, assertions, mocking (vi.fn, vi.mock, vi.spyOn), fake timers, snapshot testing, coverage, workspace projects

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SCSS Modules - locally scoped component stylesheets, cascade layers, the Sass module system, mixins, and build-time versus runtime values

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MobX observable state management patterns with mobx-react-lite. Use when implementing reactive client state with observables, computed values, actions, and the observer HOC.

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Native WebSocket API patterns, connection lifecycle, reconnection strategies, heartbeat, message typing, binary data, custom hooks

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Mantine v7 component library — theming, styling, hooks, forms, notifications

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Zustand stores, client state patterns. Use when deciding between Zustand vs useState, managing global state, or avoiding Context misuse.

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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.

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Modern native JavaScript (ES2022-ES2025) utility patterns that replace lodash

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React Query server state — query keys and query options, caching policy, error handling, and typed clients generated from an API schema

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Ant Design enterprise UI library for React

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Class Variance Authority - type-safe component variant styling with cva(), compound variants, and VariantProps

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Playwright E2E testing patterns - test structure, Page Object Model, locator strategies, assertions, network mocking, visual regression, parallel execution, fixtures, and configuration

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React Testing Library — query hierarchy, userEvent, async utilities, renderHook, custom render with providers. Load when writing or reviewing tests that render React components or hooks.

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Angular 17–19 standalone components, signals, built-in control flow, inject() DI, the resource API. Load when writing or migrating Angular components.

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Zod schema validation patterns for TypeScript - schema definitions, type inference, refinements, transforms, discriminated unions

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SolidJS fine-grained reactivity — signals, effects, memos, stores, resources, control-flow components. Load when writing Solid components or reactive state.

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Client-side image handling - preview generation, Canvas API resizing, compression, EXIF orientation, format conversion, memory management with object URL cleanup

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Component architecture, hooks and React 19 patterns. Load when building or refactoring React components, custom hooks, forms, or async UI.

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VeeValidate v4 patterns - useForm, useField, defineField, useFieldArray, schema validation with Composition API

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Type-safe i18n for the App Router — locale routing, message rendering, formatting and static generation. Load when a project imports next-intl.

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Recharts composable chart components - LineChart, BarChart, AreaChart, PieChart, ComposedChart, responsive sizing, custom tooltips, animations

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D3.js data visualization — selections, data joins, scales, axes, shapes, transitions, force layouts, geo projections, framework integration

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Drag and drop with @dnd-kit - draggable, droppable, sortable, collision detection, sensors, accessibility

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