Generate article-based posts for LinkedIn, Twitter (X), and Reddit with OpenAI

Description

Overview
AI-powered workflow that transforms any article URL into platform-optimized social media posts for LinkedIn, Twitter (X), and Reddit. Uses Mozilla Readability for content extraction, multi-agent AI with RAG from viral LinkedIn post database, and interactive review forms for content refinement before auto-publishing.

Key Capabilities:
Extracts article content: title, author, text, images, metadata
Generates LinkedIn posts using 3-agent system with viral pattern matching
Creates Twitter threads under 280 characters with article links
Auto-posts to Reddit with AI-selected flairs
Interactive review/regeneration workflow with feedback loops
Auto-publishes with images or links to all platforms

How It Works

Stage 1: Article Content Extraction
Form Submission: User enters article URL (with basic auth protection)
URL Validation: Checks if valid URL format
Article Scraping: HTTP request fetches HTML content
Readability Parsing: Mozilla Readability extracts:
Clean article text (removes ads, navigation, etc.)
Title, author, excerpt
Word count, site name
Featured image (from og:image, twitter:image, or first img tag)
Error Handling: Returns user-friendly error if scraping fails

Stage 2: LinkedIn Post Generation (3-Agent System)

Agent 1: LinkedIn Post Strategist
Input**: Extracted article content (title, text, author, excerpt)
RAG Process**: Queries Supabase vector database for similar viral LinkedIn posts
Analysis**: Identifies patterns, hooks, formatting, engagement triggers
Output**: Strategic insights and viral content patterns

Agent 2: LinkedIn Post Generator
Input**: Article content + strategist insights
Process**: Creates post using viral patterns from database
Rule**: Must include article URL in post
Output**: Draft LinkedIn post

Agent 3: LinkedIn Post Formatter
Input**: Generated post
Process**:
Removes extraneous content
Applies Sans Serif Bold Unicode for emphasis (𝗯𝗼𝗹𝗱 𝘁𝗲𝘅𝘁)
Removes markdown/em dashes
Ensures clean formatting
Output**: Polished, ready-to-post LinkedIn content

Review Loop:
User sees formatted post in web form
Options: "Regenerate" or "Continue"
If regenerate: Provide feedback → Agent creates new version
Second review form with same options
After 2 iterations or approval, proceeds to image selection

Stage 3: Image Handling for LinkedIn
Image Preview: Shows extracted article image
User Choice:
"Yes" → Downloads image, posts with text + image
"Continue without Image" → Posts with text + article link preview
Auto-Publish: Posts to LinkedIn with selected format

Stage 4: Twitter (X) Post Generation
Parallel process (runs alongside LinkedIn):
Twitter Agent:
Creates tweet under 280 characters (including spaces)
Must include article URL
Uses GPT-4.1 or GPT-5 models
Tweet Review Form: User reviews generated tweet
Regeneration Loop (if requested):
User provides feedback
Re-generate Tweet Agent creates new version
Second review form
Auto-Tweet: Posts with article image attachment

Stage 5: Reddit Post Automation
Parallel process (runs alongside LinkedIn/Twitter):
Subreddit Selection: User picks from dropdown (r/n8n, r/mcp, r/technews)
Flair Retrieval: Fetches available flairs for selected subreddit via Reddit API
AI Flair Selection:
GPT-4o-mini analyzes article title + available flairs
Selects most appropriate flair
Auto-Post: Submits link post to Reddit with title and selected flair

How To Use

Prerequisites

API Credentials Required
OpenAI API: GPT-4.1, GPT-5, GPT-5-mini, GPT-4o-mini access
Supabase: Vector database with linkedin_post table (from previous workflow)
LinkedIn OAuth2: Developer app with posting permissions
Twitter OAuth2: Developer account with tweet permissions
Reddit OAuth2: App credentials with submit permissions
Basic Auth: For form password protection

Setup Steps

1. Configure Form Access
Open "On Article Submission" node
Set up basic auth credentials for form protection
Get form URL from webhook settings

2. Link Vector Database
Ensure Supabase vector store has viral LinkedIn posts (use previous workflow to populate)
Verify "LinkedIn Post Vector Store" credentials
Check "Embedding" node has OpenAI API key

3. Set Up Social Media APIs

LinkedIn:
Configure "Text + Image" and "Text + Link" nodes
Update person parameter with your LinkedIn profile ID
Add OAuth2 credentials

Twitter:
Configure "Tweet" and "Re-generated Tweet" nodes
Add Twitter OAuth2 credentials

Reddit:
Update subreddit list in "Reddit Form" dropdown (customize to your subreddits)
Configure "Get Flair", "Reddit Post" nodes with OAuth2
Update subreddit name in "Reddit Post" query parameters

4. Configure AI Models
Verify all OpenAI credentials in language model nodes
Models used: GPT-4.1, GPT-5, GPT-5-mini (adjust based on your access)