Multi-Retriever Workflows

You often have multiple knowledge bases (Technical Docs, Marketing Notion, Sales Salesforce).

The Router Approach

1. Start: User asks a question.
2. ClassifierNode: "Is this Technical or Sales?"
3. Route:
   • Sales -> SalesRetrieverNode
   • Tech -> TechRetrieverNode

The Ensemble Approach

1. Fan-Out: Query both retrievers in parallel.
2. Fan-In: The ReRankerNode takes all results, scores them, and keeps the top 5.
3. Generate.

The graph structure makes implementing these complex pipelines trivial.