{
  "name": "answer · 70 Lab 02 challenge (SMS uses the module)",
  "nodes": [
    {
      "name": "SMS webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        0,
        300
      ],
      "parameters": {
        "httpMethod": "POST",
        "path": "my-sms",
        "responseMode": "responseNode",
        "options": {}
      }
    },
    {
      "name": "Has facts?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
        200,
        300
      ],
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "c0",
              "leftValue": "={{ $json.body.facts }}",
              "rightValue": "",
              "operator": {
                "type": "string",
                "operation": "notEmpty",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "name": "Reject empty",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        420,
        520
      ],
      "parameters": {
        "respondWith": "json",
        "responseBody": "{ \"error\": \"facts are required\" }",
        "options": {
          "responseCode": 400
        }
      }
    },
    {
      "name": "SMS agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 3.1,
      "position": [
        420,
        300
      ],
      "parameters": {
        "promptType": "define",
        "text": "=사실:\n{{ $('SMS webhook').first().json.body.facts }}",
        "options": {
          "systemMessage": "You write one Korean SMS (text message) from the facts only: at most 80 characters, one or two sentences. Copy every date and time exactly. No phone numbers, e-mail addresses or links. Return only the SMS text.",
          "maxIterations": 2
        }
      }
    },
    {
      "name": "OpenAI chat model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "typeVersion": 1.2,
      "position": [
        380,
        520
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "id",
          "value": "gpt-4.1-mini"
        },
        "options": {
          "temperature": 0
        }
      },
      "credentials": {
        "openAiApi": {
          "id": "openAiCourse0001",
          "name": "OpenAI (.env)"
        }
      }
    },
    {
      "name": "Build draft",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        640,
        300
      ],
      "parameters": {
        "jsCode": "// The writer's text, without code fences.\nreturn [{ json: { draft: String($json.output ?? '').trim().replace(/^```\\w*\\s*|```$/g, '').trim() } }];"
      }
    },
    {
      "name": "Rule check module",
      "type": "n8n-nodes-base.executeWorkflow",
      "typeVersion": 1.2,
      "position": [
        860,
        300
      ],
      "parameters": {
        "workflowId": {
          "__rl": true,
          "mode": "id",
          "value": "modRuleCheck01"
        },
        "workflowInputs": {
          "mappingMode": "defineBelow",
          "value": {
            "facts": "={{ $('SMS webhook').first().json.body.facts }}",
            "draft": "={{ $json.draft }}",
            "max_length": 80,
            "required_phrases": "={{ [] }}"
          },
          "matchingColumns": [],
          "schema": [
            {
              "id": "facts",
              "displayName": "facts",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "canBeUsedToMatch": true,
              "type": "string",
              "removed": false
            },
            {
              "id": "draft",
              "displayName": "draft",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "canBeUsedToMatch": true,
              "type": "string",
              "removed": false
            },
            {
              "id": "max_length",
              "displayName": "max_length",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "canBeUsedToMatch": true,
              "type": "number",
              "removed": false
            },
            {
              "id": "required_phrases",
              "displayName": "required_phrases",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "canBeUsedToMatch": true,
              "type": "array",
              "removed": false
            }
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": true
        },
        "options": {}
      }
    },
    {
      "name": "Build result",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        1080,
        300
      ],
      "parameters": {
        "jsCode": "// The SMS contract: { sms, published, codes }.\nreturn [{ json: { sms: $('Build draft').first().json.draft, published: $json.passed === true, codes: $json.codes ?? [] } }];"
      }
    },
    {
      "name": "Send result",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        1300,
        300
      ],
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ $json }}",
        "options": {}
      }
    }
  ],
  "connections": {
    "SMS webhook": {
      "main": [
        [
          {
            "node": "Has facts?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Has facts?": {
      "main": [
        [
          {
            "node": "SMS agent",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Reject empty",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI chat model": {
      "ai_languageModel": [
        [
          {
            "node": "SMS agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "SMS agent": {
      "main": [
        [
          {
            "node": "Build draft",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Build draft": {
      "main": [
        [
          {
            "node": "Rule check module",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Rule check module": {
      "main": [
        [
          {
            "node": "Build result",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Build result": {
      "main": [
        [
          {
            "node": "Send result",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  }
}