Implements modern JavaScript features from ES2020-ES2024 including optional chaining, nullish coalescing, private fields, Promise methods, and array transformations. Use when modernizing JavaScript code, using ES2024 features, or when user asks about latest ECMAScript standards.
Create Zustand store slices for UI-only state management
Fix React Rules of Hooks violations - conditional calls, hooks in loops/callbacks/classes
Design and build reusable, composable UI components with single responsibility, clear interfaces, and proper encapsulation. Use this skill when creating or editing React components, Vue components, Svelte components, or any modular UI building blocks. When defining component props, state management, component composition, or component APIs. When working with component files (e.g., `.jsx`, `.tsx`, `.vue`, `.svelte`), component libraries, design systems, or shared UI elements. When refactoring components, extracting reusable logic, or building component hierarchies.
Implement responsive designs using mobile-first development, fluid layouts, standard breakpoints, and relative units to ensure optimal viewing across all device sizes. Use this skill when creating layouts, implementing breakpoints, styling for different screen sizes, or ensuring mobile compatibility. When working with responsive CSS, media queries, viewport configurations, or mobile-optimized components. When testing across device sizes, implementing touch-friendly interfaces, or optimizing for mobile performance. When working in any frontend file that affects layout, spacing, typography, or visual presentation across different screen sizes.
Implement localStorage persistence in Next.js 14 App Router with SSR-safe patterns. Use when storing data in localStorage, handling hydration errors, implementing state persistence, or creating type-safe storage utilities.
useSWR/useSWRMutationでサーバーデータを管理します。データ取得、変更、SWRキー管理を含む、カスタムフックパターンを実装します。
UI/UX patterns and conventions for this project. Use for any frontend work - components, layouts, styling, notifications, forms. Contains learned preferences for Quasar/Vue or Next.js/React patterns.
Subtle animation patterns for hero sections, card reveals, page transitions, and scroll-triggered effects using Framer Motion. Use when adding animations to components, implementing scroll effects, or creating page transitions.
TypeScript patterns: type definitions, interfaces, generics, type guards, and utility types. WHEN: Writing .ts/.tsx files, defining interfaces/types, using generics, implementing type guards, configuring tsconfig.json, Vue script lang="ts". WHEN NOT: Plain JavaScript (use js-dev), runtime code without types, Python/PHP backend code.
Use when animating buttons, CTAs, or clickable action elements to create satisfying, responsive interactions
Componentes de UI para relatórios seguindo o padrão de components do Easy Budget.
Enterprise-grade component design and architecture with React 19, Vue 3.5, Atomic Design patterns, accessibility standards (WCAG 2.1 AA), design systems, and production-ready component libraries. Use when building reusable component systems, designing component libraries, implementing Atomic Design, ensuring accessibility compliance, or creating scalable UI architectures.
Review and write React/Next.js components for Diamond Fysio project. Use when reviewing components, adding features, or checking code quality. Enforces project patterns like Tailwind CSS, accessibility, Contentful integration, and i18n.
Use when building deliberate motion between 800-1200ms - dramatic reveals, loading sequences, storytelling moments where users should pause and absorb
Tailwind CSS 4 patterns and best practices. Trigger: When styling with Tailwind - cn(), theme variables, no var() in className.
Angular 21 development patterns for this project. Use when writing or reviewing Angular components, services, templates, or tests.
Create custom utilities with @utility directive supporting static utilities, functional utilities with values, theme-based utilities, and multi-value utilities. Use when extending Tailwind with custom CSS properties or patterns.
Use TanStack Query with SSR/hydration in this repo. Use when creating queries/mutations, defining query keys, integrating loaders, or troubleshooting cache/hydration issues.
Use when building features with TCA (The Composable Architecture), structuring reducers, managing state, handling effects, navigation, or testing TCA features. Covers @Reducer, Store, Effect, TestStore, reducer composition, and TCA patterns.
Create reusable, modular UI components with HTML, CSS, and JavaScript. Build component libraries with consistent styling, variants, states, and documentation. Focuses on component architecture, reusability, and maintainability.
Load the minimal Cookmate frontend context fast. Use only for frontend tasks to avoid repeated discovery: Next.js app structure, shared layouts, modules, and UI patterns.
