Production RAG at Scale: HMAC Cookies, Workspace Isolation, Hybrid Retrieval, and Citation Validation

Production RAG at Scale: HMAC Guest Cookies, Workspace Isolation, Hybrid Retrieval, and Citation Validation Executive Summary I built a production RAG system that solves four hard problems: Zero-friction onboarding: Stateless HMAC-signed guest cookies (no database overhead, 1h TTL, timing-safe validation) Enterprise multi-tenancy: Layered...