Create & Publish Instagram Carousels with AI Research, Nano Banana Pro & Slack

This workflow allows you to complete the entire process of creating and publishing detailed Instagram Carousels—from research to posting—without ever leaving Slack. It leverages Nano Banana Pro, a state-of-the-art image generation model capable of rendering perfect text, to create professional "consultant-style" slides that AI previously struggled with.

How it works Start in Slack: You trigger the workflow by entering a topic ensuring the entire process starts in Slack. Research (AI Agent): An AI agent searches the web for deep insights on the topic. Drafting (AI Agent): Structures research into a carousel format designed for engagement. Review in Slack: The draft is sent to Slack as a formatted message. You approve it with a single click. Image Generation: Upon approval, Nano Banana Pro generates professional infographic-style images with legible, high-density text. Final Review in Slack: The created images and caption are sent back to Slack. Publish from Slack: One final approval in Slack automatically publishes the Carousel to Instagram.

Setup steps Configure Credentials: OpenAI API: Required for the Research and Drafting agents (GPT-4o/GPT-5 recommended). Slack API: Required for notifications and approval buttons. Kie.ai (Nano Banana Pro): Required for high-quality text-in-image generation. Facebook Graph API: Required for publishing to Instagram. Set IDs: Open the "Slack Approval" nodes and set your Channel ID. Open the "Instagram" nodes and set your Instagram Business Account ID. Customize Prompts (Optional): Adjust the system prompts in the AI nodes to match your brand's tone of voice.

Requirements n8n version**: 1.0+ (AI nodes required) Kie.ai Account**: For using the Nano Banana Pro model (excellent at rendering text). Slack Workspace**: For the Human-in-the-loop approval process.