Detect Reddit problems & auto-comment solutions with Google Gemini & Sheets

| N8N Workflow | AI Reddit Problem Detection & Auto-Solution Commenter 🤖 This n8n workflow automates Reddit community engagement by detecting posts that discuss problems and automatically replying with AI-generated solutions — powered by Google Gemini. It’s designed for developers, automation creators, and brands who want to provide helpful, automated responses to Reddit users discussing issues in their niche. How It Works - The workflow starts with a Manual Trigger (When clicking ‘Execute workflow’). - Search for a Post: It scans the r/n8n subreddit (or any subreddit you set) for recent posts containing the keyword “Why I stopped using”. - Filter Posts (If Node): Filters posts that have 2 or more upvotes and non-empty text, ensuring only quality discussions are analyzed. - Edit Fields: Extracts post details such as title, body text, upvotes, creation time, and subreddit ID for AI processing. AI Agent + Google Gemini Chat Model: - The first AI node analyzes the post and decides whether it’s describing a problem or frustration related to AI automation. - Gemini responds with “Yes” or “No.” Conditional Branch (If1 Node): - If “Yes,” the post is confirmed as discussing a problem. - The workflow then triggers the second AI Agent. AI Agent 2 + Gemini: - The second AI node uses Gemini to generate a helpful and concise solution addressing the issue mentioned in the Reddit post (for example, offering a fix, suggestion, or new idea). Merge & Log Data: - The AI’s findings (post details + solution) are merged and saved into a connected Google Sheet for tracking community insights. Comment on Reddit: - The workflow automatically posts the AI-generated solution as a comment reply on the original Reddit thread, engaging users directly. How To Use - Import the provided JSON workflow into your n8n dashboard. - Set up the required credentials: - Reddit OAuth2 API – for searching and posting comments. - Google Gemini (PaLM) API – for AI text analysis and solution generation. - Google Sheets API – for logging post data and AI results. - Adjust the subreddit name, search keyword, or prompts to fit your niche. - Click Execute Workflow to run the automation. Requirements - Reddit Developer Account (OAuth2 credentials). - Google Gemini (PaLM) API account for AI processing. - Google Sheets account for saving analysis results. How To Customize - Change the search keyword (e.g., “help with automation,” “issue with API,” etc.). - Modify the AI prompts to tailor the solution style (technical, friendly, educational, etc.). - Edit the Google Sheet fields to capture more or fewer details. - Enable/disable the comment node if you want to manually approve replies before posting. - Adjust the Gemini model name (e.g., models/gemini-2.0-flash) or parameters for faster or more creative responses.