LLM Prompt Generation with Google Gemini

This workflow automates AI prompt creation, replacing manual trial-and-error crafting that takes 20-30 minutes per prompt for developers and marketers. The Prompt Request Form FormTrigger node collects descriptions and sections like system instructions or examples, the Validate Input If node checks for non-empty text, the Sanitize Input Set node cleans and prepares data, the Generate Prompt ChainLLM node uses Google's Gemini-2.5-flash to build structured prompts, the Validate Generation If node ensures output quality, the Format Success Response Set node adds metadata, and the Success Response Respond to Webhook node delivers JSON. Error paths (If/Respond to Webhook nodes) handle empty inputs or failures. It helps developers in small AI teams (5-20 staff) generating 50+ prompts weekly for testing models, ensuring consistent, optimized inputs without endless revisions, streamlining experimentation and deployment for chatbots or content tools.\n\nThis workflow saves 3-5 hours weekly on 50 prompts, boosting efficiency by 80%. Use cases include LLM fine-tuning for tech startups, content generation for marketing agencies. Suitable for small teams. Requires Google Gemini API (free tier with limits, $0.35/1M tokens); n8n (free self-hosted or $20/month cloud). Scalable to 200 prompts/day with paid tiers.\n\nInstall n8n via n8n.io or cloud.n8n.io. Get Gemini API key at aistudio.google.com (create project, enable API, generate key). Set GEMINI_API_KEY env var. Import JSON; webhook auto-generated at /webhook/prompt-maker. Configure Generate Prompt ChainLLM with 'gemini-2.5-flash' model and key. Update Sanitize Input Set for custom sections if needed.\n\nTest with form: Describe 'Chatbot for customer support' and select 'System Instructions'. Verify JSON prompt. Errors: Empty description (400), invalid key (500, regenerate). Activate workflow. Monitor dashboard weekly. Optimize temperature for creativity; refresh key quarterly.", "businessValue": "Saves 3-5 hours/week generating 50 AI prompts", "setupTime": "15-20 minutes", "difficulty": "Beginner", "requirements": ["Google Gemini API (free tier, $0.35/1M tokens)", "API key access", "n8n instance"], "useCase": "Automated structured prompt creation for LLMs"