This is Vercel's internal performance playbook turned into actionable code guidance. It runs 69 specific checks across React and Next.js codebases, catching things like barrel import performance hits, async waterfall patterns, and unnecessary re-renders. The rules are prioritized by actual impact, so it tackles bundle size killers and server-side bottlenecks before micro-optimizations. Each rule includes before/after code examples showing exactly what to fix. If you're shipping React apps at scale or just want to stop guessing about performance patterns, this codifies what the Vercel team actually follows internally.
When you need to build web interfaces that don't look like every other AI-generated site, this skill pushes Claude to make bold aesthetic choices and implement them with precision. It guides creation of production-ready HTML/CSS/JS or React components with distinctive typography, creative layouts, and thoughtful animations. Instead of defaulting to Inter fonts and purple gradients, it forces commitment to a specific design direction, whether that's brutalist minimalism or maximalist chaos. The code output includes working implementations with CSS variables, animation delays, and contextual visual effects that actually match the chosen aesthetic rather than falling back on generic patterns.
A solid UI audit tool that pulls the latest Web Interface Guidelines from Vercel's GitHub repo and checks your code against them. Point it at your HTML, CSS, or component files and it'll flag accessibility issues, design inconsistencies, and UX problems in a clean file:line format. The guidelines stay current since it fetches fresh rules on each run rather than using stale built-in checks. Handy for catching common web standards violations before they ship, especially if you're working fast and might miss obvious accessibility or usability issues.
This is a comprehensive reference for building videos programmatically with Remotion and React. It covers the practical stuff you'll actually need: project setup commands, audio visualization patterns, subtitle handling, FFmpeg integration for silence detection, and 3D animations with Three.js. The skill breaks down complex video workflows into specific rules files, from basic sequencing and transitions to advanced features like transparent video rendering and AI voiceover integration. It's particularly solid for developers who want to automate video creation or build data-driven animations without wrestling with Remotion's documentation every time.
A comprehensive browser automation CLI that handles the full spectrum of web interaction tasks through Chrome DevTools Protocol. What impressed me most is the thoughtful authentication handling with six different approaches, from importing existing browser sessions to encrypted credential vaults. The element reference system (@e1, @e2) makes DOM interaction reliable across page changes, and command chaining keeps workflows efficient. The network inspection and download management features push it beyond basic scraping into serious testing territory. If you're doing any programmatic web work beyond simple HTTP requests, this covers the gap between lightweight scraping libraries and heavyweight testing frameworks like Selenium.
Takes your Azure resource group and turns it into a proper Mermaid architecture diagram showing how everything connects. Crawls through all resources, maps their relationships (network flows, dependencies, identity connections), and generates a detailed markdown file with the visual diagram embedded. Handles the tedious work of analyzing SKUs, subnets, managed identities, and connection strings to show actual data flows between your app services, databases, storage accounts, and networking components. Good for documentation, onboarding new team members, or just understanding what you've actually built when your infrastructure has grown organically.
