Apify + GPT-4o-mini を使ってタグ分析から Instagram キャプションを生成

• •ターゲットAPIの認証情報が必要な場合あり
• •OpenAI API Key

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        "content": "### 1️⃣ Manual Trigger\n\n#### 🧩 Node: `When clicking ‘Execute workflow’`\n- Manually starts the workflow for testing or single-run execution.\n\n---\n\n### 2️⃣ Define the Hashtag\n\n#### 🧩 Node: `Create Search Term`\n- Sets the value of the hashtag you'd like to scan.\n- Default is `n8n`, but you can modify it to anything.\n\n```json\n{\n  \"Search_Term\": \"yourCustomHashtag\"\n}\n```\n\n---\n\n### 3️⃣ Scrape Instagram Posts\n\n#### 🧩 Node: `Find Recent Posts`\n- **API**: [Apify Instagram Hashtag Scraper](https://console.apify.com/actors/apify/instagram-hashtag-scraper)\n- **Setup**:\n  - Visit [Apify Console](https://console.apify.com/)\n  - Create an API token\n  - In n8n, go to Credentials and add `HTTP Query Auth`\n  - Use `?token=yourTokenHere` as the query string\n\n**JSON Body:**\n```json\n{\n  \"hashtags\": [\"{{ $json.Search_Term }}\"],\n  \"resultsLimit\": 20,\n  \"resultsType\": \"posts\"\n}\n```\n\n---\n\n"
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        "content": "\n### 4️⃣ Extract Captions\n\n#### 🧩 Node: `Set bio and follower count`\n- Extracts just the `caption` from each post and stores it in a clean variable for the AI agent to use.\n\n---\n\n### 5️⃣ Aggregate Captions\n\n#### 🧩 Node: `Aggregate`\n- Gathers all captions into one list before processing.\n- Useful for passing a large text block into the AI.\n\n---\n\n### 6️⃣ Convert to Single Text Block\n\n#### 🧩 Node: `Convert table names and columns into single text for agent`\n- Uses a `Code` node to combine all captions into a single string for OpenAI to read:\n```javascript\nreturn [\n  {\n    json: {\n      text: items\n        .map(item => `- ${JSON.stringify(item.json)}`)\n        .join('\\n\\n'),\n    },\n  },\n];\n```\n\n---"
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        "content": "### 7️⃣ Generate Caption Ideas with AI\n\n#### 🧩 Node: `AI Agent`\n- Takes the combined post text and sends it to GPT-4o-mini.\n- Includes this system message:\n```text\nI'm looking for ideas for posts about {{ $('Create Search Term').item.json.Search_Term }}.\nHere’s the last 5 posts on Instagram about the topic. Use those to help me generate a list of relevant captions.\n\nDo not make up ideas that are not like the others in the list.\n\nOutput like this:\n{\n  \"Post Idea\": [\"Idea1\", \"Idea2\"],\n  \"Most Common Post\": [\"common post 1\", \"common post 2\"]\n}\n```\n\n---\n\n### 8️⃣ Choose Language Model\n\n#### 🧩 Node: `OpenAI Chat Model`\n- **Model**: `gpt-4o-mini`\n- **Credential**: Use your OpenAI API key.\n  - Get it from: [OpenAI API Keys](https://platform.openai.com/account/api-keys)\n  - Add it in n8n under OpenAI credentials.\n\n---\n\n### 9️⃣ Parse the AI Output\n\n#### 🧩 Node: `Structured Output Parser`\n- Parses the GPT response into structured JSON:\n```json\n{\n  \"Post Idea\": [\"Idea1\", \"Idea2\"],\n  \"Most Common Post\": [\"common post 1\", \"common post 2\"]\n}\n```\n\n---\n"
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        "content": "## 📬 Need More Help?\n\n**👤 Robert Breen**  \nAutomation Consultant | AI Workflow Designer | n8n Expert  \n📧 [robert@ynteractive.com](mailto:robert@ynteractive.com)  \n🔗 [LinkedIn](https://www.linkedin.com/in/robert-breen-29429625/)\n"
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        "content": "### 🔟 Split the Outputs\n\n#### 🧩 Nodes: `Split Out`, `Split Out1`\n- Separates the `Post Idea` list and `Most Common Post` list into individual items.\n\n---\n\n### 🔁 Merge for Final Output\n\n#### 🧩 Node: `Merge`\n- Combines the two split lists into one output stream.\n\n---"
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            "What are the top 3 automations you've implemented with n8n? Share your experiences!",
            "Ever wondered how n8n can streamline your daily tasks? Let’s discuss the best workflows!",
            "How can n8n transform your business processes? Share your thoughts!",
            "Join our n8n community and learn from others’ automation journeys! What tips do you have to share?",
            "Post about how you used n8n to solve a particular challenge—encourage followers to share their experiences!"
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            "Join our free webinar on using n8n for efficient workflow automation!",
            "Discover how n8n connects different tools to save you time!",
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