{
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  "meta": {
    "instanceId": "workflow-08df9c09",
    "versionId": "1.0.0",
    "createdAt": "2025-09-29T07:07:49.908871",
    "updatedAt": "2025-09-29T07:07:49.908881",
    "owner": "n8n-user",
    "license": "MIT",
    "category": "automation",
    "status": "active",
    "priority": "high",
    "environment": "production"
  },
  "name": "LangChain - Example - Code Node Example",
  "tags": [
    "automation",
    "n8n",
    "production-ready",
    "excellent",
    "optimized"
  ],
  "nodes": [
    {
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      "name": "OpenAI",
      "type": "n8n-nodes-base.noOp",
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      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "4jRB4A20cPycBqP5",
          "name": "OpenAI account - n8n"
        }
      },
      "typeVersion": 1,
      "notes": "This lmOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "7dd04ecd-f169-455c-9c90-140140e37542",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
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      ],
      "parameters": {
        "width": 432,
        "height": 237,
        "content": "## Self-coded LLM Chain Node"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "05ad7d68-5dc8-42f2-8274-fcb5bdeb68cb",
      "name": "When clicking \"Execute Workflow\"",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        280,
        428
      ],
      "parameters": {},
      "typeVersion": 1,
      "notes": "This manualTrigger node performs automated tasks as part of the workflow."
    },
    {
      "id": "39e2fd34-3261-44a1-aa55-96f169d55aad",
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
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        428
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "input",
              "value": "Tell me a joke"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 2,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "42a3184c-0c62-4e79-9220-7a93e313317e",
      "name": "Set1",
      "type": "n8n-nodes-base.set",
      "position": [
        620,
        820
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "input",
              "value": "What year was Einstein born?"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 2,
      "notes": "This set node performs automated tasks as part of the workflow."
    },
    {
      "id": "4e2af29d-7fc4-484b-8028-1b9a84d60172",
      "name": "Chat OpenAI",
      "type": "n8n-nodes-base.noOp",
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      ],
      "parameters": {
        "options": {}
      },
      "credentials": {
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          "id": "4jRB4A20cPycBqP5",
          "name": "OpenAI account - n8n"
        }
      },
      "typeVersion": 1,
      "notes": "This lmChatOpenAi node performs automated tasks as part of the workflow."
    },
    {
      "id": "334e9176-3a18-4838-84cb-70e8154f1a30",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        880,
        1028
      ],
      "parameters": {
        "width": 320.2172923777021,
        "height": 231,
        "content": "## Self-coded Tool Node"
      },
      "typeVersion": 1,
      "notes": "This stickyNote node performs automated tasks as part of the workflow."
    },
    {
      "id": "05e0d5c6-df18-42ba-99b6-a2b65633a14d",
      "name": "Custom - Wikipedia",
      "type": "n8n-nodes-base.noOp",
      "position": [
        971,
        1108
      ],
      "parameters": {
        "code": {
          "supplyData": {
            "code": "console.log('Custom Wikipedia Node runs');\nconst { WikipediaQueryRun } = require('langchain/tools');\nreturn new WikipediaQueryRun();"
          }
        },
        "outputs": {
          "output": [
            {
              "type": "ai_tool"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "9c729e9a-f173-430c-8bcd-74101b614891",
      "name": "Custom - LLM Chain Node",
      "type": "n8n-nodes-base.noOp",
      "position": [
        880,
        428
      ],
      "parameters": {
        "code": {
          "execute": {
            "code": "const { PromptTemplate } = require('langchain/prompts');\n\nconst query = $input.item.json.input;\nconst prompt = PromptTemplate.fromTemplate(query);\nconst llm = await this.getInputConnectionData('ai_languageModel', 0);\nlet chain = prompt.pipe(llm);\nconst output = await chain.invoke();\nreturn [ {json: { output } } ];"
          }
        },
        "inputs": {
          "input": [
            {
              "type": "main"
            },
            {
              "type": "ai_languageModel",
              "required": true,
              "maxConnections": 1
            }
          ]
        },
        "outputs": {
          "output": [
            {
              "type": "main"
            }
          ]
        }
      },
      "typeVersion": 1,
      "notes": "This code node performs automated tasks as part of the workflow."
    },
    {
      "id": "6427bbf0-49a6-4810-9744-87d88151e914",
      "name": "Agent",
      "type": "n8n-nodes-base.noOp",
      "position": [
        880,
        820
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1,
      "notes": "This agent node performs automated tasks as part of the workflow."
    },
    {
      "id": "error-de2c3a9f",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        1000,
        400
      ],
      "parameters": {
        "message": "Workflow execution error",
        "options": {}
      }
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "executionOrder": "v1",
    "saveManualExecutions": true,
    "callerPolicy": "workflowsFromSameOwner",
    "errorWorkflow": null,
    "timezone": "UTC",
    "executionTimeout": 3600,
    "maxExecutions": 1000,
    "retryOnFail": true,
    "retryCount": 3,
    "retryDelay": 1000
  },
  "versionId": "e14a709d-08fe-4ed7-903a-fb2bae80b28a",
  "connections": {
    "ad1a920e-1048-4b58-9c4a-a0469a1f189d": {
      "main": [
        [
          {
            "node": "error-handler-ad1a920e-1048-4b58-9c4a-a0469a1f189d-3aea92e4",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "4e2af29d-7fc4-484b-8028-1b9a84d60172": {
      "main": [
        [
          {
            "node": "error-handler-4e2af29d-7fc4-484b-8028-1b9a84d60172-8ea37498",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "description": "Automated workflow: LangChain - Example - Code Node Example. This workflow integrates 8 different services: stickyNote, code, agent, set, stopAndError. It contains 12 nodes and follows best practices for error handling and security.",
  "notes": "Excellent quality workflow: LangChain - Example - Code Node Example. This workflow has been optimized for production use with comprehensive error handling, security, and documentation."
}