Apollo Server configuration, plugins, caching, federation, and performance optimization.

WAI-ARIA implementation, roles, states, and properties.

Bundle analysis, code splitting, tree shaking, and size optimization.

Cypress testing patterns, custom commands, component testing, and CI integration.

Design token management, generation, and multi-platform support.

Docker containerization for web apps, multi-stage builds, and optimization.

Drizzle ORM patterns, migrations, type-safe queries, and database schema design.

esbuild bundling, plugins, and build optimization.

ESLint configuration, custom rules, and plugin development.

Fastify plugins, hooks, validation, serialization, and performance optimization patterns.

GitHub Actions for web app CI/CD, testing, and deployment.

GraphQL schema design, resolvers, directives, subscriptions, and best practices for API development.

Image formats, responsive images, lazy loading, and CDN integration.

Jest configuration, mocking strategies, snapshot testing, and coverage.

JSON Schema validation and API contract design.

JWT implementation, token management, refresh patterns, and security.

Markdown documentation, MDX, and content formatting.

MongoDB schema design, aggregation pipelines, indexing strategies, and performance.

Mock Service Worker API mocking, request handlers, and integration testing.

Deep expertise in Next.js App Router patterns including route groups, parallel routes, intercepting routes, layouts, and loading states.

Next.js specific patterns including App Router, React Server Components, Server Actions, streaming, caching, and Vercel deployment.

OpenAPI/Swagger specification, code generation, documentation, and validation.

Playwright E2E testing, page objects, fixtures, visual regression, accessibility testing, and CI integration patterns.

pnpm workspace patterns and dependency management.

PostgreSQL query optimization, indexing, full-text search, JSONB, and advanced features.

Prettier configuration and integration.

Prisma ORM schema design, migrations, relations, query optimization, and database integration patterns.

Specialized skill for React component development, hooks patterns, state management, context API, performance optimization, and modern React best practices.

Deep expertise in React hooks patterns including custom hooks, composition, optimization, and testing strategies.

React Server Components patterns including streaming, data fetching, client/server component composition, and performance optimization.

React Testing Library patterns, queries, user events, and accessibility testing.

RxJS reactive programming patterns including operators, error handling, multicasting, and Angular integration.

Screen reader compatibility, testing, and optimization.

Technical SEO, structured data, sitemaps, and meta tags.

shadcn/ui component patterns, customization, theming, and integration.

Storybook configuration, stories, addons, interaction testing, and documentation.

JSON-LD schema markup and validation.

Turbopack configuration and Next.js integration.

Turborepo configuration, caching, and pipeline optimization.

Vercel deployment, edge functions, environment configuration, and preview deployments.

Vite configuration, plugins, optimization, HMR, and build customization.

Vitest configuration, mocking, coverage, snapshot testing, and performance.

WCAG 2.1/2.2 compliance, auditing, and remediation.

Core Web Vitals optimization, Lighthouse audits, and performance monitoring.

Webpack configuration, module federation, loaders, plugins, and optimization.

Zod schema validation and type inference.

Zustand state management patterns including store creation, middleware, persistence, slices, and DevTools integration.

Assimilate an external methodology, harness, or specification into babysitter process definitions with skills and agents.

Inspect or change Babysitter model-routing policy by phase.

Launch the babysitter observer dashboard. Installs and runs the real-time observer UI that watches babysitter runs, displaying task progress, journal events, and orchestration state in your browser.