LLM Legal Document Assistance and Processing: Contracts, Litigation, Compliance, and More

This workflow automates comprehensive legal document analysis and research across multiple practice areas using OpenAI. It handles document uploads, queries, and legal questions, routing them to specialized analysis for contracts, litigation, corporate law, compliance, or research. Key nodes include Webhook for uploads, Condition for security and input validation, Set for content sanitization, Switch for request classification, Agent for AI analysis, and Webhook Response for structured outputs. To set up, download n8n from n8n.io for self-hosting or sign up at cloud.n8n.io. Obtain an OpenAI API key from platform.openai.com and add it under Credentials > Add Credential > OpenAI API. Import the workflow JSON via Workflows > Import. Configure the Webhook node with path /legal-document-upload, set to POST, and include CORS headers (Access-Control-Allow-Origin: *). Use ngrok for local webhook testing to expose the URL. Ensure the Chat Trigger node is set to /legal-chat for interactive queries. No additional database credentials are needed. Test by sending a POST request to the webhook with JSON containing document content or a query (e.g., 'Analyze this contract') and requestType (e.g., contract, litigation). Verify Condition nodes check API key presence and content size (<50MB). The Switch node routes to the appropriate Agent (e.g., Contract Legal Analyzer), and Webhook Response returns JSON with analysis, metadata, and action items. Check for errors like missing API keys (401 response) or invalid requestType (400 response with 'INVALID_LEGAL_INPUT'). Deploy by saving and enabling the workflow, ensuring webhooks are active. Validate outputs in the Comprehensive Legal Formatter for JSON with legalAnalysis, strategicRecommendations, and disclaimers. For errors, confirm the OpenAI API key in Credentials and ensure the content is non-empty with a valid requestType. Test the Chat Trigger for follow-up queries, verifying responses include citations, action items, and professional disclaimers.