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Found 332 Skills
Comprehensive guide for implementing feature flags and A/B tests using the Flags SDK (the `flags` npm package). Use when: (1) Creating or declaring feature flags with `flag()`, (2) Setting up feature flag providers/adapters (Vercel, Statsig, LaunchDarkly, PostHog, GrowthBook, Hypertune, Edge Config, OpenFeature, Flagsmith, Reflag, Split, Optimizely, or custom adapters), (3) Implementing precompute patterns for static pages with feature flags, (4) Setting up evaluation context with `identify` and `dedupe`, (5) Integrating the Flags Explorer / Vercel Toolbar, (6) Working with feature flags in Next.js (App Router, Pages Router, Middleware) or SvelteKit, (7) Writing custom adapters, (8) Encrypting/decrypting flag values for the toolbar, (9) Any task involving the `flags`, `flags/next`, `flags/sveltekit`, `flags/react`, or `@flags-sdk/*` packages. Triggers on: feature flags, A/B testing, experimentation, flags SDK, flag adapters, precompute flags, Flags Explorer, feature gates, flag overrides.
You are a TypeScript project architecture expert specializing in scaffolding production-ready Node.js and frontend applications. Generate complete project structures with modern tooling (pnpm, Vite, N
Comprehensive UI/UX guidelines for building React/Next.js components with Ant Design, shadcn/ui charts, and consistent styling. Use when creating forms, tables, modals, cards, or any UI component. Enforces color palette, typography, spacing (8px/12px/16px/24px), animations, and component patterns specific to the application.
When the user wants to add or optimize Twitter Card metadata for X (Twitter) link previews. Also use when the user mentions "Twitter Card," "twitter:card," "twitter:image," "twitter:title," "X preview," or "tweet preview."
Generate production-ready App Store screenshots for iOS apps using AI agents, Next.js, and html-to-image
Delay loading JavaScript for less important parts of the page to improve Time to Interactive.
Deliver pre-rendered HTML content that was generated at build time for fast, cacheable pages.
Render components on the server without sending their JavaScript to the client, dramatically reducing bundle sizes.
Reduce the performance impact of third-party scripts on your site using optimized loading strategies.
Integrate markstream-react into a React 18+ or Next app. Use when Codex needs to add the React renderer, import CSS correctly, choose between `content` and `nodes`, keep Next client boundaries safe, convert renderer overrides, or prepare a repo for `react-markdown` migration.
Stripe Integration Expert
Auth.js v5 setup for Next.js authentication including Google OAuth, credentials provider, environment configuration, and core API integration