AI System Design / Architecture Doc (PDF Only, No Code)

Create a clear AI/LLM system design PDF for a production-ready chat app with RAG, guardrails, and monitoring. This is documentation-only and must be practical enough for engineers to implement. Requirements to cover in the PDF: High-level architecture + data flows (ingestion → indexing → chat) Components (API, orchestration, vector DB, storage, cache, auth/RBAC) Cost controls (caching, model routing, token limits) Security/guardrails (prompt injection + PII handling) Deployment outline (AWS preferred) + key KPIs/monitoring Failure modes + mitigations To apply (answer in proposal): 5 key components you’d include 3 top security risks in LLM apps Confirm you can deliver a PDF within 48 hours