A live text demo of a production agentic RAG assistant. Lena decides which
retrieval tool to call, searches a knowledge base built from ~40 curated AI & coding YouTube channels,
and answers grounded, with cited sources — refusing to invent when the corpus has nothing.
Built by Bastian Brand. The production version is a voice agent (VAPI); this is the same
brain exposed as text, with actions disabled and requests rate-limited. Ask about recent developments in AI
and coding — the answers come only from the knowledge base and name their sources.