{
  "name": "verify-form-trigger-shape",
  "nodes": [
    {"id": "n1", "name": "Form", "type": "form-trigger", "position": {"x": 0, "y": 0},
     "config": {"title": "Send an image",
                "fields": [{"name": "image", "label": "Image", "type": "file", "required": true}]}},
    {"id": "n2", "name": "Check", "type": "code", "position": {"x": 0, "y": 100},
     "config": {"code": "return { hasForm: typeof input.data.form === 'object' && input.data.form !== null, submitted: typeof input.data.submittedAt === 'number' };"}}
  ],
  "connections": [
    {"sourceNodeId": "n1", "sourceOutput": "main", "targetNodeId": "n2", "targetInput": "data"}
  ],
  "expect": {
    "n2": {"status": "completed", "output": {"result": {"hasForm": true, "submitted": true}}}
  }
}