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ba-n8n-expression-syntax

Identify and fix common n8n expression syntax mistakes in workflows.

Updated Apr 12, 2026
Search Tags:#workflow#debugging#validation#n8n#webhook#expressions#node-references
One-click install
npx skills add https://github.com/Yukine5377/common --skill ba-n8n-expression-syntax
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ba-n8n-expression-syntax
Source: https://github.com/Yukine5377/common/tree/main/.cursor/skills/ba-n8n-expression-syntax
Command: npx skills add https://github.com/Yukine5377/common --skill ba-n8n-expression-syntax

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps Business Analysts and workflow builders write correct n8n expressions using the {{}} syntax, avoid common mistakes, and troubleshoot expression errors, with a focus on handling webhook data.

Core Features & Use Cases

  • Guided syntax for $json, $node, $now, and $env usage in real workflows
  • Common mistakes catalog with concrete fixes and best practices
  • Troubleshooting workflows guidance for mis-evaluated expressions in webhook-driven processes

Quick Start

Describe a typical n8n expression task in your workflow and ask for corrected expressions using the correct {{}} syntax with proper webhook data handling.

Frequently Asked Questions about ba-n8n-expression-syntax

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I fix n8n expression syntax errors with $json and $node references?▼

Fix n8n expression syntax errors by ensuring $node references use proper quoting and correct .json paths within the {{}} syntax. This validates $json and $node variables to guarantee expressions evaluate correctly in your workflows.

Why does my n8n webhook expression not evaluate correctly?▼

Your n8n webhook expression fails because webhook data must be accessed under the .body property. This Skill troubleshoots mis-evaluated expressions by enforcing proper webhook data handling under .body within the {{}} syntax.

How do I format dates and use environment variables in n8n expressions?▼

Format dates and use environment variables in n8n expressions by applying correct {{}} syntax for $now and $env variables. This Skill provides guided syntax and best practices to avoid common mistakes in real workflows.

What is the correct syntax for referencing arrays in n8n workflow expressions?▼

Referencing arrays in n8n workflow expressions requires proper {{}} syntax with accurate node references and .json paths. This Skill validates array handling and node references to prevent evaluation errors in webhook-driven processes.

Can I use this to troubleshoot mis-evaluated expressions in webhook-driven n8n processes?▼

Yes, you can troubleshoot mis-evaluated expressions in webhook-driven n8n processes using this Skill. It provides a common mistakes catalog with concrete fixes and troubleshooting workflows focused on correct webhook data handling.

When should I not use n8n expressions for node references and webhook data?▼

Avoid using n8n expressions without proper quoting and .json paths, as this causes evaluation failures in webhook data processing. This Skill identifies these limitations by enforcing correct .body references and validating node paths.

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