Use Build Web Apps to create frontend application surfaces with Codex-generated visual assets, verify them with the Browser plugin and built-in app browser, compose shadcn/ui, wire Stripe payments, and design or tune Supabase/Postgres data flows.
Skills 6 in the ChatGPT listing
Frontend App Builder Use for new frontend applications, dashboards, games, creative websites, hero sections, and visually driven UI from scratch, or when the user explicitly asks for a redesign/restyle/modernization. Frontend Testing Debugging Use when testing, debugging, or making targeted improvements to rendered frontend apps through the Build Web Apps or web dev plugin: local dev servers, UI regressions, interaction bugs, console errors, responsive layout, and visual QA. React Best Practices React and Next.js performance optimization guidelines from Vercel Engineering. shadcn/ui Manages shadcn components and projects — adding, searching, fixing, debugging, styling, and composing UI. Stripe Best Practices Guides Stripe integration decisions — API selection (Checkout Sessions vs PaymentIntents), Connect platform setup (Accounts v2, controller properties), billing/subscriptions, Treasury financial accounts, integration surfaces (Checkout, Payment Element), and migrating from deprecated Stripe APIs. Supabase Postgres Best Practices Postgres performance optimization and best practices from Supabase. 