Adaptive Retrieval With Query Routing

via “semantic document retrieval with query routing”

AI PDF chatbot agent built with LangChain & LangGraph

Unique: Implements explicit query routing as a LangGraph node rather than always retrieving — this reduces unnecessary vector DB queries and latency for general-knowledge questions. Routes via LLM decision logic (not keyword heuristics), enabling nuanced routing for complex queries.

vs others: More efficient than always-retrieve RAG patterns because it skips vector search for non-document queries; more flexible than rule-based routing because LLM routing adapts to query semantics rather than fixed keywords.