[
  {"op": "doc", "text": "splice the unnamed (graph) smoother TWICE, no instance names — should collide"},
  {"op": "source", "role": "price", "kind": "F64"},
  {"op": "use", "ref": {"name": "unnamedsm"}},
  {"op": "use", "ref": {"name": "unnamedsm"}},
  {"op": "feed", "role": "price", "into": ["graph.z"]},
  {"op": "expose", "from": "graph.smoothed", "as": "out"}
]