> browse/registry

> yup

Validate data with Yup schemas. Use when adding form validation, defining API request schemas, validating configuration, or building type-safe validation pipelines in JavaScript/TypeScript.

> crawlee

Build reliable web scrapers and crawlers with Crawlee — Apify's open-source framework for structured web scraping. Use when someone asks to "scrape a website", "build a crawler", "Crawlee", "web scraping at scale", "scrape JavaScript-rendered pages", "crawl with Playwright/Puppeteer", or "extract data from websites reliably". Covers HTTP crawling, browser crawling, request queues, proxy rotation, and data export.

> sequelize

You are an expert in Sequelize, the promise-based ORM for Node.js supporting PostgreSQL, MySQL, MariaDB, SQLite, and MS SQL. You help developers define models, build queries, manage migrations, handle associations, use transactions, and configure connection pooling — providing a mature, battle-tested data access layer for production Node.js applications.

> htmx

htmx gives you access to AJAX, CSS transitions, WebSockets, and Server-Sent Events directly in HTML using attributes. It enables dynamic web UIs without writing JavaScript by letting any element issue HTTP requests and swap content into the DOM.

> astro

Assists with building content-driven websites using Astro's island architecture. Use when creating static sites, blogs, documentation, or marketing pages that ship zero JavaScript by default. Trigger words: astro, static site, island architecture, content collections, SSG, hybrid rendering, astro components.

> arcjet

Expert guidance for Arcjet, the developer-first security platform that provides rate limiting, bot protection, email validation, and attack detection as a code-first SDK. Helps developers add security layers to Next.js, Node.js, and other JavaScript/TypeScript applications without managing infrastructure.

> conform

Build progressive forms with Conform. Use when creating forms that work without JavaScript, implementing server-validated forms in Remix/Next.js, or building accessible forms with progressive enhancement.

> web-vitals-analyzer

Analyze and optimize Core Web Vitals (LCP, CLS, INP) and frontend performance. Use when a user asks to improve page speed, fix layout shifts, reduce loading times, analyze Lighthouse reports, optimize bundle size, or improve Google PageSpeed scores. Covers image optimization, code splitting, font loading, render-blocking resources, and JavaScript execution costs.

> ionic

Expert guidance for Ionic, the open-source framework for building cross-platform mobile, desktop, and progressive web apps using web technologies (HTML, CSS, JavaScript/TypeScript). Helps developers build apps with Ionic's UI components, integrate with native device APIs via Capacitor, and deploy to iOS, Android, and web from a single codebase.

> nanostores

You are an expert in Nanostores, the tiny (< 1KB) state manager for framework-agnostic JavaScript. You help developers manage application state with atoms, maps, computed stores, and async data fetching — working identically across React, Vue, Svelte, Solid, Angular, and vanilla JS with lazy subscriptions that only activate when the store is actually used in a component.

> nestjs

NestJS is a progressive TypeScript framework for building scalable server-side applications on Node.js. It uses decorators, modules, dependency injection, and an opinionated architecture inspired by Angular.

> otel-js

Instrument Node.js apps with OpenTelemetry. Use when a user asks to add distributed tracing, collect metrics, instrument HTTP requests, trace database queries, or set up observability for microservices.

> oxlint

Lint JavaScript/TypeScript at blazing speed with oxlint — a Rust-based linter 50-100x faster than ESLint. Use when someone asks to "speed up linting", "oxlint", "fast JavaScript linter", "replace ESLint", "Rust linter for JS", or "lint in CI faster". Covers rule configuration, ESLint migration, framework plugins, and CI integration.

> plasmo

Expert guidance for Plasmo, the framework for building browser extensions with React, TypeScript, and modern tooling. Helps developers create Chrome and Firefox extensions with content scripts, background workers, popup UIs, and messaging — all with hot reload and zero webpack config.

> phoenix

Phoenix is an Elixir web framework built on the BEAM VM for fault-tolerant, real-time applications. It features LiveView for interactive UIs without JavaScript, channels for WebSockets, and Ecto for database access with compile-time query validation.

> pino

Log in Node.js with Pino. Use when a user asks to add structured logging, improve logging performance, configure log levels, format logs for production, or replace console.log with proper logging.

> qwik

Qwik is a resumable web framework that delivers instant-loading applications by eliminating hydration. It serializes application state on the server and lazily loads JavaScript on interaction, making it ideal for edge deployment.

> remix

Assists with building full-stack web applications using Remix. Use when creating apps with nested routing, loader/action patterns, progressive enhancement, or deploying to Node.js, Cloudflare Workers, or other adapters. Trigger words: remix, remix run, loader, action, useFetcher, nested routes, progressive enhancement.

> rolldown

Bundle JavaScript with Rolldown — Rust-based Rollup replacement, future Vite bundler. Use when someone asks to "Rolldown", "Rust Rollup", "fast Rollup alternative", "future Vite bundler", "Rolldown bundler", or "OXC bundler". Covers Rollup-compatible config, Vite integration roadmap, performance comparison, and migration from Rollup.

> marko

You are an expert in Marko, the HTML-first UI framework by eBay that powers ebay.com. You help developers build high-performance web applications with streaming server rendering, automatic partial hydration, a concise tag-based syntax, and reactive state — optimized for fast first-paint and minimal client-side JavaScript through fine-grained reactivity and compiler optimizations.