Web & Frontend

excatt Bundle

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

excatt Bundle

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.

excatt Skill

React composition patterns — refactor boolean-prop-heavy components into compound components, flexible APIs, and Context providers. Use for component architecture design and review.

excatt Skill

Vercel Engineering's React & Next.js performance optimization guide. Use when writing React components, implementing data fetching, reviewing code for performance, refactoring, or optimizing bundle size. Contains 40+ rules across 8 priority categories.

excatt Skill

UI code review against Vercel's Web Interface Guidelines (100+ accessibility/performance/UX rules). Use for UI, a11y, or UX reviews of frontend code — not for backend or API design.

artsmc Bundle

Use this agent when you need to design API contracts BEFORE implementation. This agent enforces contract-first API design, creates OpenAPI specifications, and defines three-tier architecture for Next.js backend APIs. Invoke in these scenarios:. Use when Codex needs this specialist perspective or review style.

artsmc Bundle

Handles the visual implementation of React components. This agent is responsible for writing TSX, applying styles (CSS/SCSS/Tailwind), ensuring responsive layouts, and implementing basic user interactions (e.g., dropdowns, modals). Use this agent for any task that directly involves creating or modifying what the user sees and interacts with in the browser.. Use when Codex needs this specialist perspective or review style.

sarfraznawaz2005 Bundle

Drive the user's real, logged-in Chrome / Edge / Brave browser via the Chrome DevTools Protocol — list open tabs, screenshot, read the accessibility tree, evaluate JavaScript, click, type, and navigate on live pages. Unlike headless/automation tools it uses a persistent real profile (logins survive) and sets NO automation flags (no "controlled by automated test software" banner, navigator.webdriver stays false), so sites treat it as an ordinary human browser. Use when the user asks to inspect, automate, scrape, fill, debug, or interact with a page in their browser — especially anything behind a login.

sarfraznawaz2005 Bundle

Lightweight cross-platform desktop application framework for JavaScript, HTML, and CSS. Provides native OS operations, window management, filesystem access, and extensibility via extensions. Alternative to Electron with minimal bundle size.

valec3 Skill

Standardized guidelines and patterns for Frontend React Components.

valec3 Skill

Standardized guidelines and patterns for Frontend Accessibility Aria.

valec3 Skill

Standardized guidelines for implementing Clean Architecture in frontend applications. Use when building maintainable, testable applications with clear separation of concerns and dependency rules.

valec3 Skill

Standardized guidelines and patterns for Frontend React Hooks Custom.

valec3 Skill

Standardized guidelines and patterns for Frontend Ui Feedback States.

valec3 Skill

Standardized guidelines and patterns for Frontend Data Error Handling.

valec3 Skill

Standardized guidelines and patterns for Frontend State React Context.

valec3 Skill

Standardized guidelines and patterns for Frontend Delivery Build Tools.

artsmc Bundle

Handles the application logic and data management for the frontend. This agent is responsible for state management (e.g., Redux, Zustand), data fetching from APIs, routing, and implementing the business logic that powers the UI components. Use this agent for tasks that are not directly about the visual presentation but about making the interface functional and efficient.. Use when Codex needs this specialist perspective or review style.

artsmc Bundle

Handles the application logic and data management for the frontend. This agent is responsible for state management (e.g., Redux, Zustand), data fetching from APIs, routing, and implementing the business logic that powers the UI components. Use this agent for tasks that are not directly about the visual presentation but about making the interface functional and efficient.. Use when Codex needs this specialist perspective or review style.

valec3 Skill

Standardized guidelines and patterns for Frontend Typescript Standards.

valec3 Skill

Standardized guidelines for Screaming Architecture where folder and file names immediately reveal the business domain. Use when you want the codebase to communicate its purpose at a glance.

valec3 Skill

Standardized guidelines and patterns for Frontend Data Fetching Strategy.

valec3 Skill

Standardized guidelines and patterns for Frontend Delivery Env Management.

valec3 Skill

Standardized guidelines and patterns for Frontend Quality Error Boundaries.

valec3 Skill

Standardized guidelines and patterns for Frontend State Server React Query.

valec3 Skill

Standardized guidelines and patterns for Frontend Typescript Anti Patterns.

valec3 Skill

Standardized guidelines and patterns for Frontend Typescript Types Advanced.

valec3 Skill

Standardized guidelines for organizing React applications using feature-based architecture. Use when structuring new projects, organizing large codebases, or implementing domain-driven folder structures.

valec3 Skill

Standardized guidelines and patterns for Frontend React Component Composition.

valec3 Skill

Standardized guidelines and patterns for Frontend Delivery Production Checklist.

artsmc Bundle

WCAG compliance, screen reader compatibility, keyboard navigation, and a11y testing. Use when Codex needs this specialist perspective or review style.

valec3 Skill

Standardized guidelines and patterns for Frontend React Performance Optimization.

valec3 Skill

Standardized guidelines for defining and enforcing boundaries between features to prevent tight coupling. Use when scaling applications, preventing circular dependencies, and maintaining module independence.

valec3 Skill

Standardized guidelines for separating smart (container) components from dumb (presentational) components. Use when building reusable, testable React components with clear separation of logic and UI.

nodejsmith Bundle

Use when the user says: "mockup this UI", "show me what it looks like", "HTML mockup", "UI preview", or "generate a mockup". Generate self-contained HTML mockup files. Reads design/context.md if present for consistent styling.

sendaifun Bundle

Build frontend Solana applications with Phantom Connect SDK and Helius infrastructure. Covers React, React Native, and browser SDK integration, transaction signing via Helius Sender, API key proxying, token gating, NFT minting, crypto payments, real-time updates, and secure frontend architecture.