> browse/registry

> 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.

> phaser

You are an expert in Phaser, the fast and feature-rich HTML5 game framework for making 2D games that run in web browsers and mobile devices. You help developers build arcade games, puzzle games, RPGs, platformers, and roguelikes using Phaser's scene system, physics engines (Arcade and Matter.js), sprite animations, tilemaps, tweens, particle effects, and input handling — with TypeScript support and Vite for modern development workflow.

> 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.

> 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.

> eslint

ESLint is the standard linting tool for JavaScript and TypeScript projects. It statically analyzes your code to find problems, enforce coding conventions, and catch bugs before they reach production. ESLint 9 introduced the flat config format, replacing the legacy `.eslintrc` system with a simpler, more composable `eslint.config.js` file. With a rich plugin ecosystem covering React, TypeScript, accessibility, and import ordering, ESLint is the backbone of code quality in modern web development.

> 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.

> 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.

> graphql-yoga

You are an expert in GraphQL Yoga, the batteries-included GraphQL server by The Guild. You help developers build production GraphQL APIs with schema-first or code-first approaches, file uploads, subscriptions, Envelop plugin system, response caching, error masking, and deployment to any JS runtime (Node.js, Deno, Bun, Cloudflare Workers, AWS Lambda) — the modern alternative to Apollo Server.

> 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.

> rsbuild

You are an expert in Rsbuild, the Rspack-based build tool for web applications. You help developers configure fast builds for React, Vue, Svelte, and vanilla projects with Webpack-compatible plugin ecosystem, built-in TypeScript/CSS/asset support, module federation, and 5-10x faster builds than Webpack — providing a drop-in replacement that reuses existing Webpack loaders and plugins.

> 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.

> strapi

You are an expert in Strapi, the leading open-source headless CMS built with Node.js. You help teams build content APIs using Strapi's admin panel for content modeling, role-based access control, media library, and plugin system — with auto-generated REST and GraphQL APIs that power websites, mobile apps, and any frontend through a clean content management interface that non-technical editors can use.

> 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.