Mastering n8n: Sequential AI Agent Content Factory (Architect → Writer → Quiz Master)

Transform raw documents into full educational tutorials automatically! In this video, I show you how to build a Sequential AI Agent workflow in n8n using LangChain and OpenAI. What you’ll learn: We go deep into how to chain specialized agents together to perform complex tasks. Instead of one generic prompt, we use three distinct "personas" to ensure high-quality, structured output: Agent A (The Code Architect): Strips away the "noise" and extracts core technical concepts. Agent B (The Technical Writer): Converts architecture into a beginner-friendly, markdown-formatted tutorial. Agent C (The Quiz Master): Generates MCQs and advanced challenge questions to verify learning. Workflow Highlights: Connecting Google Drive for automatic file ingestion. Using the Extract from File node to process PDFs. Configuring LangChain Agents with specific System Prompts. Passing data sequentially using the $json.output expression. Timestamps: 0:00 - Introduction to Sequential Agents 0:45 - Workflow Overview & Architecture 2:15 - Setting up the Google Drive & PDF Extraction 4:30 - Configuring Agent A: Noise Removal 6:15 - Configuring Agent B: Markdown Technical Writing 8:45 - Configuring Agent C: Quiz Generation 11:00 - Testing the Workflow & Final Results