n8n 每日 LinkedIn 自动发帖：OpenAI 品牌反馈循环工作流

定时触发 → 获取内容创意 → AI 生成帖子 → 评分反馈循环 → 自动发布 LinkedIn

给谁

个人品牌运营者、社交媒体经理、希望自动化 LinkedIn 内容创作的小型营销团队

你会得到

按设定时间每日自动生成符合品牌调性的 LinkedIn 帖子，经 AI 评分反馈循环优化后直接发布

你需要

n8n · linkedin · notion

步骤

1. 设置定时触发与获取内容创意

   在 n8n 中配置 Schedule Trigger 节点，设置每日触发时间（默认 21:00）。连接 Execute Workflow 节点调用子工作流获取内容创意（workflowId: N5PyYK0EClSQRWNK）。确保子工作流返回包含 suggestions 数组的数据。

2. 拆分创意并格式化 AI 输入

   使用 Split Out 节点将 suggestions 数组拆分为单条创意，通过 Split In Batches 逐条处理。每条创意经 Set 节点（Format For AI Input）格式化为 JSON：{"sessionId": "{{ $itemIndex }}", "action": "sendMessage", "chatInput": "{{ $('Split Ideas').item.json.suggestions }}"}，输入到 AI Agent。

3. 基于品牌简介生成内容创意（可选子工作流）

   模板包含独立的 Get _Content _Ideas 分支：调用子工作流获取 Brand Brief（workflowId: UbKh62LfKoMDeyUo），送入 OpenAI 节点（gpt-4o-mini）生成 10 条与品牌调性一致的创意建议。输出 JSON 格式：{"suggestions": [...]}。如需使用此功能，确保 Brand Brief 子工作流可用。

   运行提示词 · 来源原文。Get _Content _Ideas 节点的 messages.values[0].content 字段

   复制提示词

   =You are a professional content writer. Create 10 topic suggestions that align with the provided brand brief.
   
   JSON output format:
   {
   "suggestions": [
   "Create a post about [...]",
   ...
   ]
   }
   Brand brief:{{ $json.content }}

4. AI Agent 生成帖子与反馈循环

   核心 AI Agent 节点（Generate LinkedIn Post with AI）使用 OpenAI Chat Model（默认 gpt-4.1-mini）与 Simple Memory。Agent 通过两个 Tool Workflow 节点调用外部工具：Get_Brand_Brief 获取品牌简介，Get_Content_Feedback 获取内容评分反馈。系统提示词定义 5 步循环：获取品牌简介 → 创建帖子 → 获取评分 → 低于 0.8 则迭代优化 → 输出最终帖子。

   运行提示词 · 来源原文。Generate LinkedIn Post with AI 节点的 options.systemMessage 字段

   复制提示词

   =
   You are a helpful content creator for Nabin Bhandari's personal brand. Use the below steps to create content.
   
   Steps:
   
   Always start by getting the brand brief using the Get_Brand_Brief tool.
   
   Create a post on the requested topic that aligns with the brand brief.
   
   Get feedback and a score on the post you created in step 2 by using the Get_Content_Feedback tool.
   
   If the score is below 0.8, use the feedback from step 3 to refine the post, then repeat steps 3 and 4.
   
   The final output should be the approved post.

   运行提示词 · 来源原文。Get Content Feedback 节点的 messages.values[0].content（system role）字段

   复制提示词

   =You are tasked with evaluating a piece of content written for Nabin Bhandari. Your role is to assess how well the post aligns with Nabin's personal brand, using the below brief as your guide.
   
   Please analyze the post based on the following criteria:
   
   Does the post have unwanted artifacts like "Let's try again" or "Here's a new post"?
   
   Does the content reflect Nabin's core values, voice, and style as described in the brief?
   
   Does it engage Nabin's target audience as described in the brief?
   
   Does it emphasize Nabin's expertise and domain authority as described in the brief?
   
   Is the tone, messaging, and approach consistent with the brief's objectives and positioning?
   
   After evaluation, output a score between 0 and 1, representing the alignment between the post and the brand brief. The score should be output in the following JSON format:
   {
     "description": "[short description here]",
     "score": [insert score here]
   }
   
   #Brand Brief:{{ $json.content }}

5. 发布到 LinkedIn

   最终帖子通过 LinkedIn 节点（Publish to Linkedin）发布。节点参数：text = {{ $json.output }}，person = Nabin Bhandari。需提前在 n8n 凭证管理器中配置 linkedInOAuth2Api 凭证。

6. 调整与注意事项

   模板 sticky note 提示：可在 AI Agent 中自定义提示词以调整语气、长度或风格；确保 LinkedIn 凭证正确配置；触发时间可在 Schedule Trigger 中修改。作者建议将品牌简介保存在 Notion 页面并保持清晰具体，可收集至少 50 条已批准帖子用于 OpenAI 微调。

你正在搭建一个 n8n 工作流，用于每日自动生成并发布 LinkedIn 帖子。请先确认以下准备项：
1) n8n 实例访问权限；2) OpenAI API 密钥；3) LinkedIn OAuth2 凭证；4) Notion API 凭证（或替代存储的品牌简介）；5) 子工作流 Get Brand Brief / Get Content Ideas / Get Content Feedback 的可用性或替换方案。确认后按步骤导入模板、替换凭证 ID、修改硬编码的作者名（Nabin Bhandari）为你的品牌信息，并在执行前用测试数据验证 AI Agent 的反馈循环。