Web & Frontend

ultroncore Skill

Module Federation

ultroncore Bundle

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.

ultroncore Bundle

TanStack Query v5 for server state management: queries, mutations, invalidation, optimistic updates, and infinite queries. Triggers on: useQuery, useMutation, QueryClient, invalidateQueries, TanStack Query, React Query, @tanstack/react-query.

ultroncore Skill

Optimize Next.js applications for Core Web Vitals, bundle size, and runtime performance. Covers Image optimization, font loading, dynamic imports, Partial Prerendering, React Server Components, caching strategies, and measuring with Lighthouse and Vercel Analytics.

ultroncore Bundle

Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.

ultroncore Bundle

Shopify Storefront API, Admin API, and headless commerce with Next.js. Triggers on: Shopify, Storefront API, shopify_storefront, Admin API, Shopify SDK, storefront access token, graphql shopify.

ultroncore Bundle

Optimize Next.js Core Web Vitals (LCP, CLS, INP/FID) and Lighthouse scores. Triggers on: LCP, CLS, INP, Lighthouse score, Core Web Vitals, next/image, font optimization, layout shift, performance budget.

ultroncore Bundle

This skill should be used when generating React forms with React Hook Form, Zod validation, and shadcn/ui components. Applies when creating entity forms, character editors, location forms, data entry forms, or any form requiring client and server validation. Trigger terms include create form, generate form, build form, React Hook Form, RHF, Zod validation, form component, entity form, character form, data entry, form schema.

ultroncore Bundle

Create Tufte-inspired data reports and infographic dashboards as standalone HTML files. Uses EB Garamond for text, Monaspace Argon for numbers, Chart.js for interactive charts, and inline SVG sparklines. Produces publication-quality reports with 2-column narrative+data layouts, status dashboards, scroll animations, and responsive mobile support. Use this skill whenever the user wants to create a data report, activity dashboard, infographic, personal analytics page, health tracker visualization, or any document that combines narrative text with interactive charts and tables. Also triggers for "make a report like Tufte", "create an infographic", "build a dashboard", "visualize my data", or requests for beautiful data-driven documents.

ultroncore Skill

Implement streaming LLM responses with server-sent events (SSE), WebSockets, and proper backpressure handling. Covers Anthropic/OpenAI streaming APIs, Next.js streaming routes, React streaming UI with useChat, and production patterns for real-time token delivery.

ultroncore Bundle

Scaffolds comprehensive testing setup for Next.js applications including Vitest unit tests, React Testing Library component tests, Playwright E2E flows, accessibility testing via axe-core, and CI accessibility gates with PR reporting. Use when setting up test infrastructure, generating test files, adding accessibility checks, configuring A11y CI pipelines, or adding WCAG compliance gates to pull requests. Trigger terms include setup testing, scaffold tests, vitest, RTL, playwright, e2e tests, component tests, unit tests, accessibility testing, a11y tests, axe-core, a11y ci, wcag ci, accessibility pipeline, accessibility reports.

ultroncore Skill

Implement real-time GraphQL subscriptions using WebSockets, Server-Sent Events, and Pub/Sub backends. Covers Apollo Server, graphql-ws, Pothos schema builder, Redis Pub/Sub, and React client integration with live query invalidation patterns.

ultroncore Bundle

This skill should be used when the user requests to generate, create, or configure Content Security Policy (CSP) headers for Next.js applications to prevent XSS attacks and control resource loading. It analyzes the application to determine appropriate CSP directives and generates configuration via next.config or middleware. Trigger terms include CSP, Content Security Policy, security headers, XSS protection, generate CSP, configure CSP, strict CSP, nonce-based CSP, CSP directives.

ultroncore Bundle

Use when the task involves UI design, UX ideation, web visuals, app screens, mockups, wireframes, landing pages, design systems, component visuals, visual iteration, layout generation, redesigns, style directions, or handoff-ready design workflows. Activates automatically for any visual product work.

ultroncore Skill

Build real-time collaborative editing features using CRDTs (Yjs, Automerge), WebSocket broadcasting, and conflict-free merging. Covers document co-editing, cursor presence, offline sync, and integrations with Tiptap and the Hocuspocus server.

ultroncore Skill

Build resilient React and Next.js UIs with error boundaries, suspense fallbacks, and structured error recovery flows. Covers class-based boundaries, react-error-boundary library, per-route boundaries, async error handling, and error reporting to Sentry.

ultroncore Skill

Native-thread animations for React Native — worklets, shared values, gestures

ultroncore Skill

Build with React Server Components (RSC) in Next.js App Router. Covers data fetching, streaming, server actions, client/server boundaries, caching strategies, and performance patterns.

ultroncore Bundle

This skill should be used when installing and configuring markdown editor functionality using @uiw/react-md-editor. Applies when adding rich text editing, markdown support, WYSIWYG editors, content editing with preview, or text formatting features. Trigger terms include markdown editor, rich text editor, text editor, add markdown, install markdown editor, markdown component, WYSIWYG, content editor, text formatting, editor preview.

ultroncore Bundle

Best practices for Remotion - Video creation in React

ultroncore Bundle

This skill should be used when adding error tracking and performance monitoring with Sentry and OpenTelemetry tracing to Next.js applications. Apply when setting up error monitoring, configuring tracing for Server Actions and routes, implementing logging wrappers, adding performance instrumentation, or establishing observability for debugging production issues.

ultroncore Skill

Optimize React Native apps for 60/120fps rendering, reduce JS bundle size, eliminate bridge bottlenecks with the new architecture (JSI/Fabric/TurboModules), profile with Flipper and Perf Monitor, and tune FlatList/FlashList for large datasets.

ultroncore Skill

Implement OAuth 2.0 and OpenID Connect flows for secure authentication and authorization. Covers authorization code + PKCE, client credentials, refresh token rotation, JWT validation, provider integration (Google, GitHub, Auth0), and FastAPI/Next.js examples.

ultroncore Bundle

This skill should be used when the user requests to scaffold, create, or initialize a full-stack Next.js application with a modern tech stack including Next.js 16, React 19, TypeScript, Tailwind CSS v4, shadcn/ui, Supabase auth, Prisma ORM, and comprehensive testing setup. Use it for creating production-ready starter templates with authentication, protected routes, forms, and example features. Trigger terms scaffold, create nextjs app, initialize fullstack, starter template, boilerplate, setup nextjs, production template, full-stack setup, nextjs supabase, nextjs prisma.

npbuilds Skill

Apply the structural science of food and wine pairing — the five component axes (acidity, tannin, sweetness, body, oak), decision framework, WineGraph elimination rules, and molecular flavor bridge methodology. Use when the user needs to understand why a pairing works, navigate difficult foods, or build pairing logic from first principles.

ffsshhttiikk Skill

Designing and building products that can be used by people with diverse abilities, including those with visual, auditory, motor, and cognitive impairments

nahisaho Bundle

Clinical reporting skill. Structured clinical study reports, CONSORT/STROBE compliance, patient demographics tables, efficacy/safety summaries, and regulatory submission formatting.

nahisaho Bundle

Epigenomics and chromatin skill. ChIP-seq/ATAC-seq analysis, histone modification mapping, chromatin accessibility, DNA methylation analysis, and epigenetic regulatory networks.

ffsshhttiikk Skill

Vue.js progressive JavaScript framework for building user interfaces

ffsshhttiikk Skill

HTML markup language for structuring web pages

ffsshhttiikk Skill

React development best practices and patterns

ffsshhttiikk Skill

Next.js full-stack React framework with SSR, API routes, and file-based routing

ffsshhttiikk Skill

Svelte reactive JavaScript framework with compile-time optimization

ffsshhttiikk Skill

Tailwind CSS utility-first CSS framework for rapid UI development

ffsshhttiikk Skill

Tailwind CSS utility-first CSS framework for rapid UI development

mittuled Bundle

This skill conducts full accessibility audits of shipped product experiences against WCAG and platform-specific standards. Use when asked to audit accessibility, evaluate inclusive design compliance, or assess assistive technology support. Also consider when a product launch has shipped without prior accessibility review. Suggest when post-launch analytics reveal user drop-off patterns consistent with accessibility barriers.