GmailメールをGemini 2.5 Pro AIで分類して自動のにタグ付け

• •Googleアカウント + Gmail API認証情報

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      "name": "Gmail トリガー",
      "type": "n8n-nodes-base.gmailTrigger",
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      "parameters": {
        "filters": {
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          "mode": "list",
          "value": "models/gemini-2.5-pro",
          "cachedResultName": "models/gemini-2.5-pro"
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        "options": {
          "systemMessage": "=You are an email classifier assistant.\nOnly respond with the most suitable existing Gmail label for this email from the following list: {{ $json.labelList }}.\nNever invent a label—not in the list. Respond with multiple matching label names which are seperated with single comma's make sure every labels are seperated using a comma, and nothing else."
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        "messages": {
          "values": [
            {
              "content": "=Below is a new email.\nSubject: {{ $('Gmail Trigger').item.json.Subject }}\nBody: {{ $('Gmail Trigger').item.json.snippet }}\nWhich Gmail label does this email belong to?"
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        "messageId": "={{ $('Gmail Trigger').item.json.id }}",
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      "position": [
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      "webhookId": "4d911551-faee-4329-a67a-9a2ee147088a",
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        "assignments": {
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              "name": "labelList",
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              "value": "={{ $json.labels.map(item => item.name).join(', ') }}"
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        "aggregate": "aggregateAllItemData",
        "destinationFieldName": "labels"
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      "parameters": {
        "jsCode": "// Get all input items (your AI output should be in items[0], and label map in items[0].json.labels)\nconst items = $input.all();\n\n// 1. Parse comma-separated label names returned by the AI node\nlet resultLabels = items[0].json.content.parts[0].text\n  .split(\",\")\n  .map((label) => label.trim())\n  .filter((label) => label.length > 0);\n\n// 2. Get the label mapping array from aggregate node (should be in items[0].json.labels)\nconst labelObjects = $('Aggregate').first().json.labels || [];\nconsole.log(\"LABEL\", labelObjects);\n\n// 3. Map label names to IDs using the mapping array\nconst labelIds = resultLabels\n  .map((lName) => {\n    const match = labelObjects.find((obj) => obj.name === lName);\n    return match ? match.id : null;\n  })\n  .filter(Boolean); // remove nulls\n\n// 4. Output as n8n expects\nreturn [\n  {\n    json: {\n      labelIds,\n    },\n  },\n];\n"
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      "parameters": {
        "width": 496,
        "height": 480,
        "content": "## 📨 AI Gmail Auto-Labeler: How it Works\n\n#### Trigger:\nWatches for new unread emails.\n\n#### Label Sync:\nFetches all your current Gmail labels (label name + ID).\n\n#### AI Classification:\nSends each new email’s subject & body to Gemini AI,\nPrompt: “Which Gmail label(s) does this email belong to?”\nAI only uses labels from your real account list.\n\n#### Label Name → ID Mapping:\nMaps AI-predicted Gmail label names to their label IDs.\n\n#### Label Application:\nAutomatically assigns one or more valid labels to each new email."
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      "parameters": {
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        "height": 336,
        "content": "## 🛠️ How to Use\n- Connect your Gmail and Gemini API credentials.\n- Customize your allowed Gmail labels in your mailbox (no need to update nodes).\n- AI will NEVER suggest a label not present in your Gmail.\n- Works best if label names are clear and differ from system labels.\n- Monitors for unread emails only (edit trigger if you want all).\n- AI can assign multiple labels (comma-separated, mapped automatically).\n- Everything is dynamic and needs no manual updating of label lists for new labels.\n- You may add filters or extra conditions as desired before/after AI classification."
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