I would like to know how to trigger the creation of a repository in an organization. Specifically, I want to send a Slack message every time a new repository is created in my organization.
Some quick steps below that should allow you to do this.
Create an n8n worklfow with a Webhook node
Copy the Webhook URL
Go to your GitHub Organisations settings
Click on Webhooks > Add Webhook
Click Payload URL > Input your Webhook URL that you copied
Go to Let me select individual events. > Select Repositories
Click Add Webhook