n8n Subworkflow Dependency Graph & Auto-Tagging

This workflow is tailored for:

• N8n Users: Individuals or teams using N8n for automation who need to manage complex workflows efficiently.
• Workflow Managers: Those responsible for overseeing multiple workflows and ensuring their optimal performance.
• Developers: Technical users looking to analyze and visualize workflow dependencies for better debugging and optimization.
• Data Analysts: Professionals who need to understand the relationships between workflows to enhance data processing and reporting.
• Project Managers: Individuals who want to maintain clear documentation of workflow dependencies for project tracking and management.

This workflow addresses the challenge of managing and visualizing workflow dependencies in N8n. It identifies which workflows call others and automatically tags sub-workflows with their calling workflows. This facilitates:

• Enhanced Visibility: Users can easily see the relationships between workflows, helping to prevent issues caused by changes in one workflow affecting others.
• Improved Organization: By tagging workflows, it becomes easier to categorize and manage them, leading to a more organized automation environment.
• Time Savings: Automating the tagging process reduces manual effort, allowing users to focus on other critical tasks.

1. Trigger: The workflow can be activated either by a schedule (every Sunday) or when the workflow is activated.
2. Retrieve Workflows: It fetches all workflows from the N8n instance to analyze their relationships.
3. Identify Callers: A script processes each workflow to list which workflows call others, building a dependency graph.
4. Filter Workflows: It excludes workflows that are not called by any other workflows, focusing only on relevant sub-workflows.
5. Count Callers: For each workflow, it counts how many workflows call it and identifies any new callers that need to be tagged.
6. Tag Management: It checks for existing tags and removes any that are already associated with new callers.
7. Create New Tags: If there are new callers, it creates new tags for them.
8. Update Tags: The workflow updates the tags of each workflow based on the identified callers.
9. Visualize: Finally, it generates a dependency graph using MermaidJS to visually represent the relationships between workflows.