Tech Stack: Next.js, React.js, Prisma ORM, PostgreSQL (Neon), Better Auth (GitHub OAuth), OpenRouter API, AI SDK, Tailwind CSS, shadcn/ui, Vercel Built a full-stack AI chat application with real-time streaming responses using Next.js and AI SDK. • Integrated 30+ AI models via OpenRouter with dynamic model selection • Implemented secure authentication using Better Auth (GitHub OAuth) • Designed scalable backend using Prisma ORM with PostgreSQL for persistent chat and message storage • Developed features like chat history, search functionality, and dynamic chat grouping • Built and deployed the application end-to-end, focusing on production debugging and performance optimization