n8n Code JavaScript — Data skill for Claude Code

n8n-skills

**Expert Claude Code skills for building flawless n8n workflows using the n8n-mcp MCP server**

[](https://github.com/czlonkowski/n8n-skills) [](LICENSE) [](https://github.com/czlonkowski/n8n-mcp)

Watch the Introduction Video

[](https://youtu.be/e6VvRqmUY2Y?si=6Igply3cadjO6Xx0)

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🎯 What is this?

This repository contains **7 complementary Claude Code skills** that teach AI assistants how to build production-ready n8n workflows using the [n8n-mcp](https://github.com/czlonkowski/n8n-mcp) MCP server.

Why These Skills Exist

Building n8n workflows programmatically can be challenging. Common issues include:

• Using MCP tools incorrectly or inefficiently
• Getting stuck in validation error loops
• Not knowing which workflow patterns to use
• Misconfiguring nodes and their dependencies

These skills solve these problems by teaching Claude:

• ✅ Correct n8n expression syntax ({{}} patterns)
• ✅ How to use n8n-mcp tools effectively
• ✅ Proven workflow patterns from real-world usage
• ✅ Validation error interpretation and fixing
• ✅ Operation-aware node configuration

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📚 The 7 Skills

1. **n8n Expression Syntax**

Teaches correct n8n expression syntax and common patterns.

**Activates when**: Writing expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors.

**Key Features**:

• Core variables ($json, $node, $now, $env)
• Critical gotcha: Webhook data is under $json.body
• Common mistakes catalog with fixes
• When NOT to use expressions (Code nodes!)

2. **n8n MCP Tools Expert** (HIGHEST PRIORITY)

Expert guide for using n8n-mcp MCP tools effectively.

**Activates when**: Searching for nodes, validating configurations, accessing templates, managing workflows.

**Key Features**:

• Tool selection guide (which tool for which task)
• nodeType format differences (nodes-base.* vs n8n-nodes-base.*)
• Validation profiles (minimal/runtime/ai-friendly/strict)

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