n8n-validation-expert

Interprets and fixes nginx validation errors in n8n workflows.

Updated Jan 27, 2026
One-click install
npx skills add https://github.com/Brmbobo/Lead-Gen --skill n8n-validation-expert-brmbobo
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: n8n-validation-expert
Source: https://github.com/Brmbobo/Lead-Gen/tree/main/.claude/skills/n8n-validation-expert
Command: npx skills add https://github.com/Brmbobo/Lead-Gen --skill n8n-validation-expert-brmbobo

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Validation errors in n8n workflows can stall development and confuse teams; this skill helps interpret and fix them quickly, reducing cycle time.

Core Features & Use Cases

  • Interpret and categorize errors and warnings (missing_required, invalid_value, type_mismatch, invalid_expression, invalid_reference).
  • Guide an iterative validation loop: configure → validate → fix → revalidate, with profiles like runtime, ai-friendly, minimal, and strict.
  • Provide recovery patterns and best practices, including auto-sanitization notes and handling false positives.

Quick Start

Ask this skill to explain a specific validation error and suggest concrete next steps, then apply those steps and revalidate the workflow.

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 during workflow development?

Fix n8n validation errors by categorizing the issue, applying targeted recovery patterns for the specific node, and revalidating the workflow within a configured validation profile.

What are false positives in n8n workflow validation and how do I handle them?

False positives in n8n validation are incorrect warnings flagged during workflow checks. Handle them by referencing validation guidance to apply auto-sanitization notes and specific recovery patterns.

How do I resolve missing_required and type_mismatch validation errors in n8n nodes?

Resolve missing_required and type_mismatch validation errors in n8n nodes by interpreting the specific error category, correcting the operator-structure, and validating the input values against node requirements.

What n8n validation profile should I use to debug Slack and HTTP node issues?

Use the strict, runtime, ai-friendly, or minimal validation profiles in n8n to debug Slack and HTTP node issues. These profiles guide the iterative configure, validate, fix, and revalidate loop.

Why does my n8n workflow show an invalid_expression validation error?

An invalid_expression validation error in an n8n workflow indicates a structural or reference issue within a node. Fix it by applying recovery patterns and verifying operator-structure against node requirements.

Can I use this skill to debug operator-structure issues across Slack and HTTP nodes in n8n?

Yes, you can debug operator-structure issues across Slack, HTTP, and other n8n nodes. The skill provides targeted recovery patterns and references specific error catalogs for guidance.