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

Description

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.