Production-ready Next.js 16 SaaS starter with auth, payments, and AI — ship this weekend. • Auth.js v5: email + Google/GitHub OAuth, roles & sessions included • Stripe: checkout, billing portal, webhooks syncing plan + AI credits • Streaming AI chat with per-user credit quotas • Prisma 7 + zero-config SQLite (Postgres in one line) • Tailwind v4 dark mode, landing/pricing/dashboard/admin pages • One-click Vercel deploy, MIT license Runs in demo mode with no API keys. $79 — half of ShipFast.