Generate business requirement documents with Multi-agent GPT & Google Workspace

by Trung Tran ✓ · 2,087 views · created 2025-08-17 · AI RAG, Multimodal AI

What this workflow does

This AI workflow has 28 nodes and runs when someone submits an n8n form (“Business Requirements Document Request Form”) (plus 1 other trigger). Along the way it connects OpenAI Chat Model, Google Sheets, Google Drive and SendGrid and 1 more. It also calls googleapis.com over HTTP.

How it runs

Trigger: When someone submits an n8n form (“Business Requirements Document Request Form”) (plus 1 other trigger).

1. Handle multiple files (Code): runs custom JavaScript code
2. Create BRD request record (Code): runs custom JavaScript code
3. Request completed? (Filter): keeps only the items that match a condition
4. Upload supporting (Google Drive): uses Google Drive
5. Extract from File: extracts data from a file (pdf)
6. Add BRD record to tracking (Google Sheets): append
7. General BRD Writer Agent (AI Agent): runs an AI agent, with model: OpenAI Chat Model; 1 tool (Query Data Tool)
8. Business Requirement Writer Agent (AI Agent): runs an AI agent, with model: OpenAI Chat Model; 1 tool (Query Data Tool)
9. Create supporting document record(s) (Code): runs custom JavaScript code
10. Insert Data to Store (Simple Vector Store): stores documents in the Simple vector store, with embeddings: Embeddings; document loader: Default Data Loader

…plus 10 more steps. See the full node list below.

Services it uses

OpenAI Chat ModelGoogle SheetsGoogle DriveSendGridEmbeddings OpenAI

HTTP calls to: googleapis.com

Before you upgrade to n8n 3.0

Nodes used (16)

• n8n Form Triggern8n-nodes-base.formTrigger
• Extract from Filen8n-nodes-base.extractFromFile
• Coden8n-nodes-base.code
• Simple Vector Store@n8n/n8n-nodes-langchain.vectorStoreInMemory
• Default Data Loader@n8n/n8n-nodes-langchain.documentDefaultDataLoader
• OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
• Google Sheetsn8n-nodes-base.googleSheets
• Filtern8n-nodes-base.filter
• Google Sheets Triggern8n-nodes-base.googleSheetsTrigger
• Google Driven8n-nodes-base.googleDrive
• SendGridn8n-nodes-base.sendGrid
• HTTP Requestn8n-nodes-base.httpRequest
• Edit Fields (Set)n8n-nodes-base.set
• Embeddings OpenAI@n8n/n8n-nodes-langchain.embeddingsOpenAi
• AI Agent@n8n/n8n-nodes-langchain.agent
• Mergen8n-nodes-base.merge

From the author

Multi-agent RAG system for smarter BRD (Business Requirement Document) writing Who’s it for This workflow is designed for Business Analysts, Project Managers, and Operations Teams who need to automate the creation, tracking, and delivery of Business…

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