GPT-4 と再利用可能な思考ツールで複数ステップの推論を行う AI エージェントを作成

• •OpenAI API Key

{
  "nodes": [
    {
      "id": "97a1c69c-d9b4-44a4-a533-25c1af48b38f",
      "name": "チャットメッセージ受信時",
      "type": "@n8n/n8n-nodes-langchain.chatTrigger",
      "position": [
        -32,
        -96
      ],
      "webhookId": "35e86578-a7fb-4973-9783-9963602c9bb6",
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.3
    },
    {
      "id": "3a6435c3-636b-4e88-b4be-3fdc7af4f587",
      "name": "AIエージェント",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        208,
        -128
      ],
      "parameters": {
        "options": {
          "systemMessage": "You are a very smart assistant.\n\nYou always start by calling the tool \"Initial thoughts\" to plan the way you'll proceed to use the tools X, Y, and Z.\n\nOnce you've executed your initial plan, call the tool \"Additional thoughts\" to check in with the results and decide if you need to further use tools X, Y, and Z or if you're ready to answer the user.\n"
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "1cdbe2f6-5b78-4c5c-8a76-2ddd2b126543",
      "name": "OpenAI チャットモデル",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        48,
        112
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4.1-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "dMiSy27YCK6c6rra",
          "name": "Duv's OpenAI"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "99fb74bf-dae8-4ae4-9f35-ad5c95d5a97d",
      "name": "シンプルメモリ",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        208,
        112
      ],
      "parameters": {},
      "typeVersion": 1.3
    },
    {
      "id": "74bd5f99-5e02-41b9-961e-7d4654df47a4",
      "name": "初期思考",
      "type": "@n8n/n8n-nodes-langchain.toolWorkflow",
      "position": [
        448,
        224
      ],
      "parameters": {
        "workflowId": {
          "__rl": true,
          "mode": "list",
          "value": "KNxyzmWuqSCK1GUR",
          "cachedResultName": "TEMPLATE - AI agent with multiple thinking tools"
        },
        "description": "Always start your process by calling this tool to write initial thoughts and plan the way you'll go about answering the user query.",
        "workflowInputs": {
          "value": {
            "Thoughts": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Thoughts', `Write initial thoughts very concisely (be token efficient, just list some thoughts) on the best ways to go about the user query.`, 'string') }}"
          },
          "schema": [
            {
              "id": "Thoughts",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Thoughts",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            }
          ],
          "mappingMode": "defineBelow",
          "matchingColumns": [
            "Thoughts"
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": false
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "81f7dad8-01d4-4f26-be4b-250835f97a6b",
      "name": "追加思考",
      "type": "@n8n/n8n-nodes-langchain.toolWorkflow",
      "position": [
        624,
        224
      ],
      "parameters": {
        "workflowId": {
          "__rl": true,
          "mode": "list",
          "value": "KNxyzmWuqSCK1GUR",
          "cachedResultName": "TEMPLATE - AI agent with multiple thinking tools"
        },
        "description": "Call this tool after having ... to check-in and decide if other steps would be needed before being able to finally answer the user query.",
        "workflowInputs": {
          "value": {
            "Thoughts": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Thoughts', `Write your thoughts very concisely (be token efficient, just list some thoughts) on the best ways to go about the user query.`, 'string') }}"
          },
          "schema": [
            {
              "id": "Thoughts",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Thoughts",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            }
          ],
          "mappingMode": "defineBelow",
          "matchingColumns": [
            "Thoughts"
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": false
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "6912f166-d7a7-441c-92e6-578f3f9a81e5",
      "name": "付箋",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -608,
        -96
      ],
      "parameters": {
        "width": 480,
        "height": 768,
        "content": "# Advanced Agent Reasoning Framework\n\nThis template demonstrates how to give an AI agent multiple, custom \"thinking\" steps to build more powerful and reliable automations. It bypasses the single **Think Tool** limit by using a reusable sub-workflow.\n\n## How it works\n\nA simple sub-workflow is used as a reusable \"scratchpad.\" We call it multiple times with the **Tool (Workflow)** node, giving each call a unique description to guide the agent's thinking process (e.g., plan first, then reflect later).\n\n## How to use this template\n\nThis template is a foundation. To make it your own:\n\n1.  **Add your action tools:** Connect your own tools (e.g., web search, API calls) to the **AI Agent**. It needs tasks to think about!\n2.  **Customize the thinking:** Edit the `description` of the `Initial thoughts` and `Additional thoughts` tools to make them relevant to your new action tools.\n3.  **Instruct the agent:** Update the **system prompt** of the main **AI Agent** to tell it how to use its new set of thinking and action tools to solve problems.\n4.  **Connect your AI provider** and activate the workflow."
      },
      "typeVersion": 1
    },
    {
      "id": "3dd09d82-c7d3-40e9-bad6-3b64729142e5",
      "name": "付箋1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        384,
        96
      ],
      "parameters": {
        "color": 7,
        "width": 400,
        "height": 240,
        "content": "## Your thinking tools\nFeel free to adjust their prompts, add more, and connect other necessary tools for your workflow."
      },
      "typeVersion": 1
    },
    {
      "id": "7fdd3183-a348-4c1b-b1ee-5ceef90bfc07",
      "name": "付箋2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -16,
        352
      ],
      "parameters": {
        "color": 7,
        "width": 304,
        "height": 320,
        "content": "## The subworkflow\nThis subworkflow imitates the thinking tool as it accepts a string called \"thought\" as an input."
      },
      "typeVersion": 1
    },
    {
      "id": "3eab469a-d1d3-4da2-be78-c938f85dc943",
      "name": "思考サブワークフロー",
      "type": "n8n-nodes-base.executeWorkflowTrigger",
      "position": [
        80,
        512
      ],
      "parameters": {
        "workflowInputs": {
          "values": [
            {
              "name": "Thoughts"
            }
          ]
        }
      },
      "typeVersion": 1.1
    },
    {
      "id": "96cb61dc-146f-4c34-bec5-6d150d2c2bd7",
      "name": "付箋3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        192,
        -240
      ],
      "parameters": {
        "color": 7,
        "width": 400,
        "height": 240,
        "content": "## The agent\nDon't forget to customise the system prompt to your use case!"
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "99fb74bf-dae8-4ae4-9f35-ad5c95d5a97d": {
      "ai_memory": [
        [
          {
            "node": "3a6435c3-636b-4e88-b4be-3fdc7af4f587",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    },
    "74bd5f99-5e02-41b9-961e-7d4654df47a4": {
      "ai_tool": [
        [
          {
            "node": "3a6435c3-636b-4e88-b4be-3fdc7af4f587",
            "type": "ai_tool",
            "index": 0
          }
        ]
      ]
    },
    "1cdbe2f6-5b78-4c5c-8a76-2ddd2b126543": {
      "ai_languageModel": [
        [
          {
            "node": "3a6435c3-636b-4e88-b4be-3fdc7af4f587",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "81f7dad8-01d4-4f26-be4b-250835f97a6b": {
      "ai_tool": [
        [
          {
            "node": "3a6435c3-636b-4e88-b4be-3fdc7af4f587",
            "type": "ai_tool",
            "index": 0
          }
        ]
      ]
    },
    "97a1c69c-d9b4-44a4-a533-25c1af48b38f": {
      "main": [
        [
          {
            "node": "3a6435c3-636b-4e88-b4be-3fdc7af4f587",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}