Level 2: Dynamic Routing with RunnableBranch

Instead of a single linear chain, a Multi-Chain setup uses a router to decide which sub-chain should handle a specific request.Key Topics for Your Level 2 Video:The Routing Mechanism: Using a prompt to categorize user intent (e.g., "Is this a math question or a coding question?").RunnableBranch Syntax: How to define conditions and their corresponding chains.Default Paths: Ensuring your chain has a "fallback" if the input doesn't match any specific branch.LCEL (LangChain Expression Language): Using the pipe | operator to connect these complex components seamlessly.Example Workflow:Input: User asks a question.Classifier: A small, fast LLM identifies the topic.RunnableBranch: * If Topic A $\rightarrow$ Go to Specialized Chain A.If Topic B $\rightarrow$ Go to Specialized Chain B.Else $\rightarrow$ Go to General Assistant Chain.