INPUT
User Request
Chat API
Streaming
REST / WebSocket
↓
LAYER 1
Input Governance
Intent Classification
PII Masking
Injection Detection
↓
LAYER 2
Evidence Generation
Hybrid RAG
LLM Generation
Citation Linker
↓
LAYER 3
Output Verification
Guardrails
Numeric Validation
Uncertainty Score
↓
LAYER 4
Escalation
Audit Log
HITL Router
Alert System
↓
OUTPUT
Verified Response
Cited Answer
Confidence Score
Audit Trail