mermaid-chart

Generate Mermaid diagrams as .mmd files and render them to .png images.

1|Updated Sep 9, 2025
One-click install
npx skills add https://github.com/emaginebr/zTools --skill mermaid-chart-emaginebr
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mermaid-chart
Source: https://github.com/emaginebr/zTools/tree/main/.claude/skills/mermaid-chart
Command: npx skills add https://github.com/emaginebr/zTools --skill mermaid-chart-emaginebr

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 automates the creation of visual diagrams from text-based Mermaid syntax, making complex information easier to understand and share.

Core Features & Use Cases

  • Mermaid Diagram Generation: Creates .mmd files for various diagram types (flowcharts, sequence diagrams, ER diagrams, etc.).
  • PNG Image Rendering: Automatically converts .mmd files into .png images for easy embedding and sharing.
  • Use Case: You need to document a complex system architecture. Use this Skill to generate a C4 diagram from a textual description, producing both the source file and a visual PNG.

Quick Start

Create a flowchart named 'user-login-flow' that shows the steps for a user logging into a system.

Frequently Asked Questions about mermaid-chart

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

FAQPage Schema
How do I generate a flowchart and save it as a PNG from text?

To generate a flowchart and save it as a PNG, you provide text-based Mermaid syntax to create a `.mmd` file, which is then automatically rendered into a `.png` image using the Mermaid CLI for easy sharing.

Can I render sequence diagrams and ER diagrams as images using Mermaid syntax?

Yes, you can render sequence diagrams, ER diagrams, and all other Mermaid diagram types as `.png` images. The tool validates the syntax and converts the `.mmd` source files into visual graphics.

What is the best way to document system architecture with Mermaid diagrams?

The best way to document system architecture with Mermaid diagrams is to generate a C4 diagram from a textual description, producing both the `.mmd` source file and a visual `.png` image for embedding.

Does Mermaid CLI support automatic PNG conversion for Gantt charts?

Yes, Mermaid CLI supports automatic PNG conversion for Gantt charts. The process creates a `.mmd` file from your syntax and renders it directly into a `.png` image with robust error handling for failures.

Why does my Mermaid diagram fail to generate a PNG image?

Your Mermaid diagram fails to generate a PNG image when there are syntax validation errors. The generation process includes robust error handling that catches syntax issues before and during image rendering.

Can I specify the output directory for rendered Mermaid PNG files?

Yes, you can specify the output directory for rendered Mermaid PNG files. The process ensures that output files are correctly named and placed in the exact directory you define during generation.