Built a production-style AI customer support MVP for a fictional SaaS company. The platform ingests PDF, DOCX, TXT, and Markdown knowledge files, retrieves relevant content using PostgreSQL and pgvector, and generates grounded answers with verified citations. It also supports deterministic lead qualification, human handoff, appointment requests, and signed n8n automation events. Built with FastAPI, Next.js, PostgreSQL, Docker, Playwright, and CI. Core MVP completed.