mermaid-validate

Validate Mermaid diagram syntax in Markdown files using Node.js scripts.

56|5|Updated Feb 27, 2026
One-click install
npx skills add https://github.com/diegomarino/claude-toolshed --skill mermaid-validate
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mermaid-validate
Source: https://github.com/diegomarino/claude-toolshed/tree/main/plugins/mermaid/skills/mermaid-validate
Command: npx skills add https://github.com/diegomarino/claude-toolshed --skill mermaid-validate

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

Ensures that Mermaid diagrams embedded within Markdown files or directories adhere to correct syntax, preventing rendering errors and improving documentation quality.

Core Features & Use Cases

  • Syntax Validation: Checks Mermaid code blocks for syntax errors.
  • File/Directory Scanning: Can validate diagrams in a single Markdown file or across all Markdown files within a directory.
  • Use Case: Before merging documentation changes, run this skill to automatically verify that all newly added or modified Mermaid diagrams are syntactically correct.

Quick Start

Validate all mermaid diagrams in the file 'documentation.md'.

Frequently Asked Questions about mermaid-validate

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

FAQPage Schema
How do I check Mermaid diagram syntax in Markdown files?

To check Mermaid diagram syntax in Markdown files, use Node.js scripts to parse and validate code blocks. This process scans files or directories to detect syntax errors and prevent rendering issues in documentation.

Can I validate all Mermaid diagrams across a directory at once?

Yes, you can validate all Mermaid diagrams across a directory at once. The validation scripts support directory scanning to automatically verify diagram syntax across multiple Markdown files during documentation maintenance.

Do I need Node.js to validate Mermaid syntax in Markdown?

Yes, you need Node.js installed to validate Mermaid syntax in Markdown. The validation process relies on specific JavaScript scripts executed in the Node.js environment to parse and check diagram code blocks.

Why should I validate Mermaid diagrams before merging documentation changes?

Validating Mermaid diagrams before merging documentation changes ensures that newly added or modified diagrams adhere to correct syntax, preventing rendering errors and maintaining overall documentation quality in code review workflows.

What is the best way to prevent Mermaid rendering errors in Markdown?

The best way to prevent Mermaid rendering errors in Markdown is to run automated syntax validation scripts. These scripts check Mermaid code blocks for syntactic correctness before documentation changes are merged.

Does Mermaid syntax validation work with standard Markdown code blocks?

Yes, Mermaid syntax validation works with standard Markdown code blocks. The validation scripts specifically parse Markdown files to locate and verify the syntax of embedded Mermaid diagram code.