Database.build runs Postgres directly in the browser using PGlite WASM with data persisted in IndexedDB. Each database instance is paired with a large language model that enables natural language interactions for importing CSVs, generating tables on the fly, producing reports and charts, and building database diagrams. The monorepo contains a Next.js web app, a WebSocket proxy for Postgres connections, and a deploy worker for pushing in-browser databases to platforms like Supabase.