Embeddable AI support widget - businesses add it with one script tag. Built a RAG pipeline with Gemini Embeddings + pgvector delivering source-cited answers across 100s of documents in under 2 seconds, achieving 90% query relevance accuracy. Multi-tenant architecture with workspace management and NextAuth. Stack: Next.js, TypeScript, PostgreSQL, Prisma, Gemini 2.5 Flash, Vercel.