frontend-dev

Lint and format frontend code with Biome 2.4. Covers type-aware linting, GritQL custom rules, domains, import organizer, and migration from ESLint/Prettier. Use when configuring linting rules, formatting code, writing custom lint rules, or setting up CI checks. Triggers on biome, biome config, biome lint, biome format, biome check, biome ci, gritql, migrate from eslint, migrate from prettier, import sorting, code formatting, lint rules, type-aware linting, noFloatingPromises.

Build React 19 applications with TypeScript. Covers Actions, Activity, use() hook, React Compiler, ref-as-prop, useEffectEvent, and strict TypeScript patterns. Use when creating components, managing state, typing props, handling events, using hooks, or working with React 19 features. Triggers on react, typescript, tsx, component types, hook types, react 19, react compiler, actions, use hook, useEffectEvent, activity, import defer.

Build UIs with Tailwind CSS v4 and shadcn/ui. Covers CSS variables with OKLCH colors, component variants with CVA, responsive design, dark mode, and Tailwind v4.2 features. Supports Radix UI and Base UI primitives, CLI 3.0, and visual styles. Use when building interfaces with Tailwind, styling shadcn/ui components, implementing themes, or working with utility-first CSS. Triggers on tailwind, shadcn, utility classes, CSS variables, OKLCH, component styling, theming, dark mode, radix ui.

Build type-safe React apps with TanStack Query (data fetching, caching, mutations), Router (file-based routing, search params, loaders), and Start (SSR, server functions, middleware). Use when working with react-query, data fetching, server state, routing, search params, loaders, SSR, server functions, or full-stack React. Triggers on tanstack, react query, query client, useQuery, useMutation, invalidateQueries, tanstack router, file-based routing, search params, route loader, tanstack start, createServerFn, server functions, SSR.

Configure and optimize Vite 7 for React projects. Covers build tooling, dev server, plugins, HMR, chunk splitting, Environment API, and Rolldown integration. Use when setting up Vite, configuring builds, optimizing bundles, managing plugins, or troubleshooting dev server. Triggers on vite, vite config, vite plugin, HMR, dev server, build optimization, chunk splitting, rolldown, vite proxy, environment api, rolldown-vite.