Duoduo Pipeline

Connect a zero-cost mechanical layer to a duoduo brain job so the LLM only runs when there is something worth acting on. During idle periods the brain job stays dormant — no polling, no token spend.

The three-layer model

Mechanical layer  (shell / Python script — zero LLM)
      │
      │  duoduo session notify  ← fires only when new data arrives
      ▼
Brain job  (keepalive — dormant by default)
      │
      │  Notify  ← fires only when signal meets your threshold
      ▼
Main session  (your foreground chat)