grade_evidence
{\"bad\": \"refuse\"}
decide_route
qa[qa_graph]
qa_graph的消息队列
retrieve[retrieve]
Start
decide_retrieve
{\"qa\": \"qa\"}
End
generate[generate_answer]
{\"retrieve\": \"retrieve\"}
refuse[refuse_or_clarify]
顶级路由的消息队列router_graph
{\"direct\": generate}
{\"good\": \"generate\"}
route[route_node]
decide_retrieve[decide_retrieve_node]
