[DRAFT] feat(tool): Add N8n Tool node

[everettbu]

Mirror of n8n-io/n8n#20792
Original author: idirouhab

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Summary

This PR adds a new ToolN8n node to the LangChain package, allowing AI agents to execute n8n workflows as part of their tool-calling capabilities. This integration enables LangChain agents to leverage n8n's extensive
automation capabilities within their reasoning and action loops.

Key Features:

• Execute n8n workflows from LangChain agents
• Pass dynamic input data to workflows

Changes:

• Added ToolN8n.node.ts with workflow execution logic
• Added n8n.svg icon for the tool
• Updated package.json to register the new tool node

Testing:

1. Create a simple n8n workflow with a AI Agent node
2. Add the ToolN8n node to the AI Agent
3. Write a System prompt that that uses the n8n Tool attached
4. Verify the agent can successfully call the workflow and receive results

Related Linear tickets, Github issues, and Community forum posts

Docs: n8n-io/n8n-docs#3770

Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

[everettbu]

Upstream PR was closed or merged. Code is synced via branch mirror.