🧠 n8n Blog Automation Workflow

End-to-end automation of SEO-optimized WordPress blog post creation using LLM agents, real-time search, intelligent content structuring, and optional image generation.

📌 Overview

This workflow accepts basic blog post parameters from a form, dynamically fetches WordPress categories, and generates a complete article through orchestrated AI agents. It includes:

• Real-time online data gathering
• Structured outline generation
• Section planning and writing
• SEO-enhanced editing
• Metadata and image prompt creation
• Category selection and post publishing
  

🔁 Trigger

• Form Trigger: Collects user inputs:
  • Keywords
  • Word count
  • Number of sections
  • Writing style
  • Website URL
  • Generate featured image? (yes/no)

🧠 Orchestration Agent

Central LangChain agent that manages the full multi-step pipeline. It calls these specialized agents:

1. GetOnlineInfo – Uses OpenRouter for current Q&A and search insights.
2. OutlinePlanner – Creates SEO-structured Table of Contents.
3. createSections – Breaks ToC into detailed sections with short descriptions.
4. SectionsWriter – Writes legally sound, citation-rich, expert content.
5. Editor – Refines, formats, and assembles all content into publish-ready HTML.
6. MetaInfo – Generates title, slug, and meta description, select the category.
7. ImagePrompt (optional) – Generates prompt and alt text for AI image generation.

Each agent is invoked only once, in strict sequence, using query-wrapped JSON input.

✍️ Writing Flow

1. GetOnlineInfo: Gathers Q&A data from web.
2. OutlinePlanner: Builds a logical, SEO-driven structure.
3. createSections: Converts ToC into section objects.
4. SectionsWriter: Writes expert content per section.
5. Editor: Compiles and refines the article.
6. MetaInfo: Produces metadata (title, slug, description, category id).
7. ImagePrompt: Creates an image prompt and alt text (if enabled).
8. Final Check: If content is marked ready, post proceeds to publication.

✅ Output Format

{
  "toc": "Table of Contents",
  "post_html": "<final HTML content>",
  "meta_data": {
    "title": "...",
    "slug": "...",
    "description": "..."
  },
  "image_data": {
    "image_prompt": "...",
    "alt_text": "..."
  },
  "ready": true
}

🌐 WordPress Integration

• Uses authenticated API to create and update:
  • Posts (/wp-json/wp/v2/posts)
  • Media (/wp-json/wp/v2/media)
• Automatically assigns selected category and random author.
• Posts are published in draft mode by default.
• Sets featured image metadata and linkage if image is generated.

🧩 Setup Instructions

1. Required Credentials

• WordPress API credentials
• OpenAI API key
• OpenRouter API key (optional)

2. Sub-Workflows Required

• OutlinePlanner
• createSections
• SectionsWriter
• Editor
• MetaInfo
• ImagePrompt (if enabled)

Each must support input via {"query": "<text>"}.

3. Dynamic Inputs

• Categories are fetched via WP REST API and shown in the form.
• Image creation can be toggled (true/false).

📸 Optional Image Pipeline

If enabled, this runs:

1. Generate image prompt and alt text
2. Create realistic cover image (1024x1024)
3. Resize and upload image to WordPress
4. Set image metadata and assign featured image

💡 Notes

• All data outputs (HTML, JSON) are structured and valid.
• Source links are embedded via HTML anchor tags.
• Modular design supports debugging each tool-agent.
• Styled for clarity, SEO, and legal accuracy.
• Responsive to live content needs via web search.