VelocityKit is a production-ready Next.js SaaS starter with AI-ready architecture built in. It includes complete auth flows (sign up, sign in, password reset), Stripe billing for one-time and subscription payments, structured AI context files, 20+ prepared prompts for common use cases, and optional AI-driven content generation during onboarding to help you get up and running fast. Built with Supabase, Stripe, PostHog, Resend, and a clean, mobile-first shadcn/ui + Tailwind UI template.