[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [
        {
          "type": "list",
          "name": "M|PST",
          "expression": "isBlank(value)",
          "columnName": "M|PST",
          "invert": false,
          "omitBlank": false,
          "omitError": false,
          "selection": [
            {
              "v": {
                "v": false,
                "l": "false"
              }
            }
          ],
          "selectBlank": false,
          "selectError": false
        }
      ],
      "mode": "record-based"
    },
    "baseColumnName": "M|PST",
    "expression": "grel:if(value.contains('¬'),with(value.split('¬'), v, v[0].trim() + ' @' + v[1].trim()),value)",
    "onError": "set-to-blank",
    "newColumnName": "4002",
    "columnInsertIndex": 127,
    "description": "Create column 4002 at index 127 based on column M|PST using expression grel:if(value.contains('¬'),with(value.split('¬'), v, v[0].trim() + ' @' + v[1].trim()),value)"
  }
]