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

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

Setup steps

1. 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.
2. Set IDs:
   • Open the "Slack Approval" nodes and set your Channel ID.
   • Open the "Instagram" nodes and set your Instagram Business Account ID.
3. 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.