{
  "nodes": [
    {"id": "event_in", "label": "Incoming Event", "type": "event", "metadata": {}},
    {"id": "handler", "label": "Handle Event / Transform", "type": "function", "metadata": {}},
    {"id": "log", "label": "Log to Ledger (conceptual)", "type": "function", "metadata": {}},
    {"id": "out", "label": "Emit Output", "type": "output", "metadata": {}}
  ],
  "edges": [
    {"source": "event_in", "target": "handler", "label": "", "metadata": {}},
    {"source": "handler", "target": "log", "label": "", "metadata": {}},
    {"source": "log", "target": "out", "label": "", "metadata": {}}
  ]
}