Conditional routing directs a request to the agents needed for its intent. Semantic analysis can identify multiple needs, letting a workflow invoke one agent or coordinate several rather than relying on brittle keyword matching. section 8.1.3
A request with two needs
A customer asks whether similar boots are available in waterproof material, then asks about the return policy. The workflow can route the product need to search and the policy question to Q&A. section 8.0
async def analyze_intent(query: str) -> dict:
"""AI-powered intent analysis using function calling for reliability"""
intent_llm = ChatOpenAI(model="gpt-5.4-mini”)
tools = [{ #1
"type": "function",
"function": {
"name": "analyze_intent",
"description": "Analyze customer intent",
"parameters": {
"type": "object",
"properties": {
"search_needed": {"type": "boolean"},
"qa_needed": {"type": "boolean"},
"reasoning": {"type": "string"}
},
"required": ["search_needed", "qa_needed", "reasoning"]
}
}
}]
messages = [{"role": "user", "content": f"Analyze this customer query:
{query}"}]
response = await intent_llm.ainvoke(messages, tools=tools,
tool_choice="required")
if hasattr(response, 'tool_calls') and response.tool_calls:
args = response.tool_calls[0]["args"]
return args
return {"search_needed": True, "qa_needed": False, "reasoning":
"Fallback"} #2
The intent-analysis function uses structured function calling to produce search-needed and Q&A-needed flags, plus reasoning. section 8.1.3
def route_based_on_intent(state: ConversationState) -> str:
"""Route to appropriate agents based on analyzed intent"""
analysis = state["intent_analysis"]
if analysis["search_needed"] and analysis["qa_needed"]:
return "both_needed" #1
elif analysis["search_needed"]: #1
return "search_agent" #1
elif analysis["qa_needed"]: #1
return "policy_agent" #1
else: #1
return "search_agent" #2
workflow.add_conditional_edges( #3
"analyze_intent", #3
route_based_on_intent, #3
{ #3
"both_needed": "search_agent", #3
"search_agent": "search_agent", #3
"policy_agent": "policy_agent" #3
} #3
) #3
A routing function maps those flags to a search agent, a policy agent, or a combined path, then connects the choices with LangGraph conditional edges. section 8.1.3
