Auto-post generation for LinkedIn and Gmail

This automation flow is designed to generate professional, research-backed LinkedIn posts based on a user-submitted topic and audience, enhance it with a visually aligned image prompt, and then automatically send the post and image via Gmail and/or publish it to LinkedIn.

⚙️ How It Works (Step-by-Step):

1. 📝 Form Submission (Input Trigger)

  A user fills out a form with:

    Email

    Topic of the Post

    Target Audience

  This form submission acts as the entry point of the workflow (Form Trigger node).

2. 🤖 LinkedIn Post Generation Agent

  An AI agent is triggered that:

    Uses Tavily API to fetch real-time web search content related to the topic.

    Processes the topic and audience data using an Ollama Chat Model.

    Generates a well-structured LinkedIn post that includes:

      Hook

      Educational insight

      Professional tone

      Source citations

      Hashtags and call to action

3. 🎨 Image Prompt Agent

  The generated post is passed to a second agent that:

    Extracts the core message.

    Converts it into a graphic prompt using a different Ollama LLM.

    The prompt is written to be used by an image-generation model like DALL·E or Gemma/GPT-based image tools.

4. 🖼️ Image Generation

  The image prompt is passed to a local image generation endpoint (localhost:8098) or OpenAI (api.openai.com) to generate a visual asset.

  The base64 image is converted into a file.

5. 📩 Email Dispatch

  The post text and the generated image are then sent to the user’s email address via the Gmail node.

  The email includes:

    The full LinkedIn post

    The auto-generated image as an attachment

6. 🔗 LinkedIn Publishing (Optional)

  If OAuth is enabled, the post can also be published directly to LinkedIn using the LinkedIn node.

🛠️ Tools Used:

  n8n: Orchestration platform

  OpenRouter & Ollama: Local/hosted LLMs for post and prompt generation

  Tavily API: Real-time web search

  OpenAI or Local Endpoint: Image generation from text

  SMTP (Gmail): For sending emails

  LinkedIn API: For automated posting

📦 Key Features:

  End-to-end automation from form to email/post

  Uses real-time research for accuracy

  Creative visual generation with professional branding intent

  Works locally or with cloud APIs

  Modular: Can switch tools or endpoints (OpenAI ↔ Localhost, Ollama ↔ OpenRouter)

🚀 Ideal Use Cases:

  Marketing teams needing fast content turnaround

  Personal branding assistants

  Founders, freelancers, and executives sharing thought leadership

  University or organization-wide communication systems