Agentic RAG Patterns

Build self-correcting retrieval systems with LLM-driven decision making.

LangGraph 1.0.6 (Jan 2026): langgraph-checkpoint 4.0.0, compile-time checkpointer validation, namespace sanitization.

Architecture Overview

Query → [Retrieve] → [Grade] → [Generate/Rewrite/Web Search] → Response
              ↓           ↓
         Documents    Quality Check
                          ↓
                   Route Decision:
                   - Good docs → Generate
                   - Poor docs → Rewrite query
                   - No docs → Web fallback