I Built 12 Production React Templates with AI - Here Is What I Learned

Over the past 3 months, I built 12 production-ready fullstack templates — each with AI features, Docker deployment, and a real database. Not boilerplates with TODO comments. Actual apps with auth, payments, dashboards, and seed data. Here's what I learned, what worked, and what surprised me. The Stack (One Stack, Every Template) Every template runs the same stack: React 19 + Vite 7 + Mantine 8 (frontend) Fastify 5 + Prisma 7 + PostgreSQL (backend) Zustand + TanStack Query (state management) Zod (shared validation — one schema, zero type drift) Docker + Traefik (deployment with auto-SSL) Why the same stack everywhere? Because consistency compounds. Every template shares the same patterns, the same folder structure, the same auth flow. If you learn one, you can navigate all twelve. The 12 Templates Full-Stack Starter Kit — Auth, dashboard, AI chat, Stripe. The base everything else builds on. AgentForge — AI agent management dashboard. Agent registry, task queue, execution logs, CRON sche