mermaid-correction

Validate, diagnose, and repair Mermaid code blocks with iterative corrections.

1|1|Updated Mar 3, 2026
One-click install
npx skills add https://github.com/SwimmingLiu/easy-skills --skill mermaid-correction
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mermaid-correction
Source: https://github.com/SwimmingLiu/easy-skills/tree/main/skills/diagram/mermaid-correction
Command: npx skills add https://github.com/SwimmingLiu/easy-skills --skill mermaid-correction

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires @mermaid-js/mermaid-cli, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill automatically validates, diagnoses, and corrects syntax errors in Mermaid diagrams, ensuring they render correctly.

Core Features & Use Cases

  • Syntax Validation: Uses the official Mermaid CLI to check diagram validity.
  • Error Diagnosis: Clearly explains parse errors, including line numbers and expected syntax.
  • Iterative Correction: Rewrites Mermaid code up to three times to fix errors.
  • Use Case: You have a complex flowchart in Mermaid syntax that won't render. Use this Skill to automatically identify the syntax error, explain it, and provide a corrected version.

Quick Start

Use the mermaid-correction skill to fix the following Mermaid code block:

Frequently Asked Questions about mermaid-correction

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

FAQPage Schema
How do I fix a broken Mermaid diagram that won't render?

To fix a broken Mermaid flowchart, you must validate its syntax and correct parse errors. This Skill diagnoses rendering failures, explains the syntax errors, and iteratively rewrites the Mermaid code up to three times to ensure it renders correctly.

Why does my Mermaid flowchart have a syntax error?

A Mermaid flowchart has a syntax error when its code violates parsing rules, such as invalid node shapes or missing links. This Skill validates the code block using the official Mermaid CLI and reports the exact line numbers and expected syntax.

Do I need Node.js to validate Mermaid syntax before commit?

Yes, you need Node.js to validate Mermaid syntax before commit. This Skill requires the Node.js environment to execute scripts and the `@mermaid-js/mermaid-cli` dependency to perform the syntax validation and iterative correction workflow.

What is the best way to debug a Mermaid sequence diagram?

The best way to debug a Mermaid sequence diagram is through an iterative check-correct-recheck workflow. This Skill uses the official Mermaid CLI to validate the diagram, explains the parse errors, and automatically rewrites the syntax up to three times.

Can I use this approach to fix a Mermaid ERD or state diagram?

Yes, you can use this approach to fix a Mermaid ERD or state diagram. This Skill supports validating, diagnosing, and repairing parse errors across various Mermaid formats, including ERDs, state diagrams, C4 diagrams, gantt charts, and git graphs.

What are the limitations of automated Mermaid code correction?

The limitation of automated Mermaid code correction is that it attempts to rewrite invalid syntax up to three times. If the parse errors in the Mermaid code block persist after three iterative corrections, the automated validation workflow will stop.