Building a Multi-Agent RAG System for Enterprise Knowledge
A single LLM with retrieval augmented generation handles simple Q&A. Enterprise knowledge is messier — conflicting documents, versioned policies, domain-specific terminology. Multi-agent RAG solves this.
Retrieval Augmented Generation (RAG) connects a language model to a document store. The model doesn't need to memorize your company's policies — it retrieves the relevant document at query time and reasons over it. This works beautifully for simple, well-structured knowledge bases. Enterprise knowledge is rarely simple or well-structured.
The enterprise knowledge problem
Real enterprise knowledge is contradictory (last year's policy vs this year's update), domain-specific (jargon that general models don't understand), distributed (in PDFs, SharePoint, Confluence, email threads, Slack), and versioned (the 2023 rate schedule is wrong; the 2024 one applies except for contracts signed before March). A naive RAG pipeline will confidently give wrong answers.
Where multi-agent design helps
The solution is to decompose retrieval into specialized agents. A routing agent determines which knowledge domain a query belongs to. Domain-specific retrieval agents search within curated, versioned document sets. A synthesis agent reconciles potentially conflicting retrieved passages and surfaces uncertainty explicitly. A validation agent checks the answer against known facts before delivery.
Chunking strategy matters more than model choice
The most impactful variable in RAG quality isn't which embedding model you use — it's how you chunk documents. Semantic chunking (splitting by meaning rather than by token count) dramatically improves retrieval relevance. Parent-child chunking (storing full sections but indexing by sentence) lets you retrieve precise matches while maintaining context in the response.
Evaluation is non-negotiable
Production RAG systems need continuous evaluation pipelines. You need to track retrieval accuracy (did we get the right documents?), answer faithfulness (did the model stay grounded in the retrieved content?), and answer relevance (did we actually answer the question?). Without these metrics, you're flying blind, and hallucinations will eventually cause real problems.
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