n8n-validation-expert

Name: n8n-validation-expert
Availability: InStock
Author: JulioBorges

Interpret n8n validation errors and guide workflow fixes.

1|Updated Feb 3, 2026

Search Tags:#validation #n8n #errors #false-positives #validate_node #auto-sanitization

Ready to run

npx skills add https://github.com/JulioBorges/ag-n8n-skills --skill n8n-validation-expert-julioborges

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: n8n-validation-expert
Source: https://github.com/JulioBorges/ag-n8n-skills/tree/main/.agent/.skills/n8n-automation/n8n-validation-expert
Command: npx skills add https://github.com/JulioBorges/ag-n8n-skills --skill n8n-validation-expert-julioborges

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps developers and operators interpret complex validation feedback from n8n, guiding structured fixes to move workflows from invalid to valid.

Core Features & Use Cases

Interpret errors (missing_required, invalid_value, type_mismatch, invalid_expression, invalid_reference) and warnings (best_practice, deprecated, performance).
Guide through the validation loop: run validation, read errors, apply fixes, re-validate, repeat until valid.
Assist with false positives, validation profiles (minimal, runtime, ai-friendly, strict), and auto-sanitization guidance.
Use cases include debugging Slack, HTTP, and database integrations, pre-production validation, and AI-assisted workflow design.

Quick Start

To begin, provide a sample validation result and ask the skill to outline a step-by-step remediation plan.

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 in my workflows?▼

You can resolve n8n validation errors by following an iterative validation loop: read the specific error types like missing_required or type_mismatch, apply targeted node fixes, and re-validate until the workflow passes.

What is auto-sanitization in n8n workflow validation?▼

Auto-sanitization in n8n workflow validation is a guided process that helps automatically clean and correct invalid node configurations, ensuring workflows meet the required structural and runtime standards before execution.

How do I handle false positives when validating n8n nodes?▼

Handle n8n validation false positives by switching to a different validation profile, such as minimal or runtime, which adjusts validation strictness and filters non-critical warnings for accurate diagnostics.

What is the best way to debug Slack and HTTP integration errors in n8n?▼

The best way to debug Slack and HTTP integration errors in n8n is to use a structured validation loop, utilizing diagnostic tools to read invalid_expression or invalid_reference errors and guide iterative fixes across the integrations.

When should I use strict versus minimal validation profiles in n8n?▼

Use the strict validation profile for pre-production checks to catch all errors and performance warnings, while the minimal or ai-friendly profiles are better suited for active development and AI-assisted workflow design.

Why does my n8n workflow show invalid_reference errors after running validation?▼

Your n8n workflow shows invalid_reference errors because the validation process detected nodes referencing non-existent fields or variables, requiring you to correct the expressions mapping data between your HTTP and database nodes.