{
  "name": "nested-loop-sees-outer-item",
  "description": "A node inside a nested loop must still be able to reference the OUTER loop's item. Reproduces the Email OCR failure of 2026-09-04: build_email sits in a loop over one email's attachments, nested in a loop over emails, and {{email.from}} resolved to empty - so the reply was addressed to nobody and the send failed with \"At least one recipient is required\". The inner loop deliberately uses a different item variable name, and the assertion checks both are visible at once.",
  "nodes": [
    {
      "id": "n1",
      "name": "Trigger",
      "type": "click-trigger",
      "position": {
        "x": 0,
        "y": 0
      },
      "config": {}
    },
    {
      "id": "seed",
      "name": "Seed",
      "type": "code",
      "position": {
        "x": 0,
        "y": 100
      },
      "config": {
        "code": "return { mails: [{ from: 'a@example.com', parts: ['p1', 'p2'] }] };"
      }
    },
    {
      "id": "outer",
      "name": "Outer",
      "type": "loop",
      "position": {
        "x": 0,
        "y": 200
      },
      "config": {
        "inputField": "result.mails",
        "itemVariableName": "email",
        "continueOnError": false
      }
    },
    {
      "id": "inner",
      "name": "Inner",
      "type": "loop",
      "position": {
        "x": 240,
        "y": 200
      },
      "config": {
        "inputField": "data.parts",
        "itemVariableName": "part",
        "continueOnError": false
      }
    },
    {
      "id": "build",
      "name": "Build",
      "type": "set-fields",
      "position": {
        "x": 480,
        "y": 200
      },
      "config": {
        "mode": "only-set",
        "fields": [
          {
            "name": "outerFrom",
            "value": "{{email.from}}"
          },
          {
            "name": "innerPart",
            "value": "{{part}}"
          }
        ]
      }
    },
    {
      "id": "after",
      "name": "After",
      "type": "set-fields",
      "position": {
        "x": 240,
        "y": 340
      },
      "config": {
        "mode": "only-set",
        "fields": [
          {
            "name": "done",
            "value": "yes"
          }
        ]
      }
    }
  ],
  "connections": [
    {
      "sourceNodeId": "n1",
      "sourceOutput": "main",
      "targetNodeId": "seed",
      "targetInput": "data"
    },
    {
      "sourceNodeId": "seed",
      "sourceOutput": "main",
      "targetNodeId": "outer",
      "targetInput": "data"
    },
    {
      "sourceNodeId": "outer",
      "sourceOutput": "loop",
      "targetNodeId": "inner",
      "targetInput": "data"
    },
    {
      "sourceNodeId": "inner",
      "sourceOutput": "loop",
      "targetNodeId": "build",
      "targetInput": "data"
    },
    {
      "sourceNodeId": "outer",
      "sourceOutput": "done",
      "targetNodeId": "after",
      "targetInput": "data"
    }
  ],
  "expect": {
    "build": {
      "status": "completed",
      "output": {
        "outerFrom": "a@example.com",
        "innerPart": "p2"
      }
    }
  }
}