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n8n-validation-expert

Diagnose n8n validation errors and guide remediation fixes.

Updated Aug 23, 2026
Search Tags:#automation#debugging#validation#n8n#error-handling#false-positives#workflow-validation
One-click install
npx skills add https://github.com/mtdmarg/presalesViola --skill n8n-validation-expert-mtdmarg
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: n8n-validation-expert
Source: https://github.com/mtdmarg/presalesViola/tree/main/.agents/skills/n8n-validation-expert
Command: npx skills add https://github.com/mtdmarg/presalesViola --skill n8n-validation-expert-mtdmarg

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Interpret and guide remediation of n8n validation errors, warnings, and false positives to speed up reliable workflow development and deployment.

Core Features & Use Cases

  • Interpret error types (missing_required, invalid_value, type_mismatch, invalid_expression, invalid_reference) and provide concrete fixes and best-practice guidance.
  • Explain the validation loop, recommended profiles (minimal, runtime, ai-friendly, strict), and auto-sanitization behavior to reduce manual debugging time.
  • Guide decision-making for false positives, with documentation templates and recovery strategies for broken workflows.

Quick Start

Provide a sample workflow configuration and run validate_node to see errors, then iteratively fix them per guidance.

Frequently Asked Questions about n8n-validation-expert

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

FAQPage Schema
How do I fix n8n validation errors for missing required fields and type mismatches?▼

Fix n8n validation errors like missing_required or type_mismatch by applying targeted remediation steps and best-practice guidance to correct invalid values, references, and expressions within workflow nodes.

What is the n8n validation loop and which profile should I use?▼

The n8n validation loop iteratively checks nodes using profiles like minimal, runtime, ai-friendly, and strict to identify errors and apply auto-sanitization, reducing manual debugging time during workflow development and deployment.

How do I handle false positives in n8n workflow validation?▼

Handle n8n validation false positives by applying decision-making guidance, recovery strategies for broken workflows, and documentation templates to accurately interpret warnings without unnecessary code changes.

Can I validate Slack, HTTP request, and database query nodes in n8n?▼

Yes, you can validate Slack, HTTP request, and database query nodes in n8n by running validation checks to diagnose errors, interpret invalid references, and optimize configurations across these specific integration types.

What's the best way to debug broken n8n workflows during deployment?▼

The best way to debug broken n8n workflows is to run validate_node on your sample configuration, interpret the resulting error types, and iteratively apply suggested fixes and auto-sanitization recovery patterns.

Why does my n8n workflow throw an invalid_expression or invalid_reference error?▼

n8n workflows throw invalid_expression or invalid_reference errors when node configurations contain malformed expressions or point to non-existent data paths, requiring targeted remediation to restore proper workflow validation.

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