> browse/registry

> prettier

Prettier is an opinionated code formatter that enforces a consistent style across your entire codebase. Unlike linters that flag problems for you to fix, Prettier rewrites your code automatically. It supports JavaScript, TypeScript, HTML, CSS, JSON, Markdown, YAML, and many other languages. By removing style debates from code review, Prettier lets teams focus on logic and architecture instead of arguing about tabs versus spaces or trailing commas.

> puppeteer

Automate browsers and scrape dynamic websites with Puppeteer. Use when a user asks to scrape JavaScript-rendered pages, automate browser interactions, take screenshots of web pages, generate PDFs from URLs, test web UIs, fill out forms programmatically, crawl SPAs, extract data from dynamic sites, automate login flows, or build web scrapers that need a real browser. Covers headless Chrome, page navigation, DOM interaction, network interception, screenshots, PDF generation, and stealth techniques

> rspack

Bundle JavaScript/TypeScript applications with Rspack — Rust-based webpack replacement that's 5-10x faster. Use when someone asks to "speed up webpack", "Rspack", "fast bundler", "Rust bundler for JavaScript", "replace webpack", "migrate from webpack", or "faster build times". Covers webpack compatibility, configuration, loaders, plugins, and migration from webpack.

> artillery

When the user wants to perform load testing or performance testing using Artillery with YAML-based scenario definitions. Also use when the user mentions "artillery," "YAML load test," "WebSocket testing," "Socket.io load test," "scenario-based load testing," or "artillery run." For JavaScript-based load testing, see k6.

> 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.

> keystonejs

Expert guidance for KeystoneJS, the open-source headless CMS and application platform built on Node.js, GraphQL, and Prisma. Helps developers define content schemas, build admin interfaces, implement access control, and create custom GraphQL APIs for content-driven applications.

> 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.

> 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.

> 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.

> code-migration

Migrate codebases between frameworks, languages, and API versions. Use when a user asks to convert JavaScript to TypeScript, migrate React class components to hooks, upgrade Vue 2 to Vue 3, migrate Python 2 to 3, update deprecated APIs, switch ORMs, convert Express to Fastify, or modernize legacy code. Handles incremental migration with backward compatibility.

> 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.