flowchart LR
  %% Left-to-right streaming pipeline (no Outer/Inner Loop)
  A[User Query] --> B[PlanAgent｜计划与拆解]
  B --> C[拆分子任务]
  C --> Q{{子任务队列}}
  Q --> E[执行每个子任务]
  E --> F[Agent｜调度与工具检索]
  F --> T[ToolAgent｜执行器]
  T --> R[Reflection｜反思]
  R --> FB[反馈与结果汇总]
  FB --> U[PlanAgent｜更新（可选：增/删/改）]
  U --> K[End Result]
