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mermaid-syntax

Validate Mermaid diagram syntax in Markdown fenced blocks.

1|Updated Feb 15, 2026
Search Tags:#documentation#markdown#mermaid#validation#rendering#syntax#diagrams
One-click install
npx skills add https://github.com/p-iknow/fullstack-forge --skill mermaid-syntax
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: mermaid-syntax
Source: https://github.com/p-iknow/fullstack-forge/tree/main/.claude/skills/mermaid-syntax
Command: npx skills add https://github.com/p-iknow/fullstack-forge --skill mermaid-syntax

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill enforces correct Mermaid diagram syntax in Markdown documents to prevent rendering issues and syntax errors.

Core Features & Use Cases

  • Validates Mermaid fenced blocks in Markdown to catch common mistakes like improper line breaks, unsafe node labels, and edge syntax errors.
  • Provides quick examples of correct versus incorrect Mermaid syntax to improve authoring quality.
  • Use Case: In a documentation repo, ensure all Mermaid diagrams render properly across pages before publishing.

Quick Start

Create a Mermaid block that correctly renders a simple flow diagram in your Markdown document.

Frequently Asked Questions about mermaid-syntax

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

FAQPage Schema
Why does my Mermaid diagram not render in Markdown?▼

Mermaid diagrams fail to render in Markdown due to syntax errors like improper line breaks, unsafe node labels, or edge syntax mistakes. Validating the fenced Mermaid blocks catches these common issues before publishing documentation.

How do I fix line break and edge syntax errors in Mermaid blocks?▼

To fix Mermaid syntax errors, apply validation rules for line breaks, node label safety, and edge labeling within Mermaid blocks. Comparing your code against correct versus incorrect syntax examples helps identify and resolve mistakes.

What is the best way to validate Mermaid syntax before publishing documentation?▼

The best way to validate Mermaid syntax is to run a check during authoring or code review of Markdown documentation. This catches rendering issues early by enforcing correct syntax for line breaks, node labels, and edges.

Can I check Mermaid diagrams for node label safety during code review?▼

Yes, you can check Mermaid diagrams for node label safety during Markdown code review. The validation process specifically targets unsafe node labels alongside line break and edge syntax errors to ensure diagrams render correctly.

When do I need to validate Mermaid syntax in Markdown files?▼

You need to validate Mermaid syntax in Markdown files when authoring documentation or reviewing code before publishing. This ensures all Mermaid diagrams render properly across pages and prevents rendering failures.

Does incorrect line break formatting break Mermaid diagram rendering?▼

Incorrect line break formatting breaks Mermaid diagram rendering. Validating line breaks within Mermaid fenced blocks in Markdown prevents these common syntax mistakes and ensures diagrams display correctly.

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