Does this require an external Mermaid installation?

No, the validation logic is handled by the agent plugin within the Claude Code environment, requiring no additional local dependencies.

Does this skill work with all types of Mermaid diagrams?

Yes, it is designed to validate standard Mermaid syntax used in flowcharts, sequence diagrams, Gantt charts, class diagrams, and more.

Can it fix errors automatically?

Yes, by using the --fix flag, the skill will attempt to automatically resolve common syntax errors it identifies within your Markdown files.

Can I check only the files I have recently modified?

Absolutely. Running the check command without specific arguments defaults to scanning files that have been changed in your current git branch.

Mermaid Syntax Validator

Name: Mermaid Syntax Validator
Author: shdennlin

byshdennlin

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Learning & Documentation

Validates and repairs Mermaid diagram syntax within Markdown files to ensure visual documentation renders correctly.

The Mermaid Syntax Validator is a specialized skill for Claude Code designed to maintain the integrity of visual documentation. It scans Markdown files for Mermaid code blocks, identifies syntax errors that prevent diagrams from rendering, and provides automated fixes for common mistakes. Whether you are reviewing git-changed files or auditing an entire project's documentation, this skill ensures your flowcharts, sequence diagrams, and charts remain functional and professional across platforms like GitHub and GitLab.

Key Features

01Automated syntax validation for all Mermaid diagram types

02Seamless integration with existing Markdown documentation workflows

03Flexible scanning of git-changed files, specific paths, or entire projects

04Detailed reporting of validation findings and applied corrections

051 GitHub stars

06Intelligent auto-fixing of common formatting and syntax errors

Use Cases

01Auditing complex technical diagrams during design and architecture reviews

02Mass-fixing broken Mermaid blocks in legacy project documentation

03Verifying documentation diagrams before committing code changes

Key Features

01Automated syntax validation for all Mermaid diagram types

02Seamless integration with existing Markdown documentation workflows

03Flexible scanning of git-changed files, specific paths, or entire projects

04Detailed reporting of validation findings and applied corrections

051 GitHub stars

06Intelligent auto-fixing of common formatting and syntax errors

Use Cases

01Auditing complex technical diagrams during design and architecture reviews

02Mass-fixing broken Mermaid blocks in legacy project documentation

03Verifying documentation diagrams before committing code changes