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mermaid-diagram

Generate Mermaid diagrams from plain text for workflows and architectures.

Updated Aug 27, 2026
Search Tags:#mermaid#flowchart#visualization#sequence#diagrams#uml
One-click install
npx skills add https://github.com/younwony/younwony.github.io --skill mermaid-diagram-younwony
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: mermaid-diagram
Source: https://github.com/younwony/younwony.github.io/tree/main/.claude/skills/write/mermaid-diagram
Command: npx skills add https://github.com/younwony/younwony.github.io --skill mermaid-diagram-younwony

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Mermaid diagrams let you represent workflows, sequences, and architectures with lightweight, human-readable syntax, replacing verbose drawings.

Core Features & Use Cases

  • Flowcharts for business processes and decision trees
  • Sequence diagrams for API calls and system interactions
  • Class/ER diagrams for data modeling and relationships
  • State diagrams and other diagram types supported by Mermaid
  • Quick embedding in Markdown/docs and easy sharing of diagram visuals

Quick Start

  1. Create a Mermaid diagram in a text file with a .mmd extension or embed Mermaid code blocks in Markdown.
  2. Install Mermaid CLI if exporting graphics: npm install -g @mermaid-js/mermaid-cli
  3. Generate an SVG/PNG: mmdc -i my-diagram.mmd -o my-diagram.svg
  4. Include the generated image in your docs or view in a Mermaid-enabled viewer.

Frequently Asked Questions about mermaid-diagram

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

FAQPage Schema
How do I generate a sequence diagram from plain text for API calls?▼

To generate a sequence diagram from plain text, you write standard Mermaid syntax in a text file and the tool converts it into a visual diagram representing API calls and system interactions. This replaces verbose manual drawing with human-readable text.

What types of diagrams can I create using Mermaid syntax?▼

Mermaid syntax supports creating Flowcharts, Sequence Diagrams, Class Diagrams, State Diagrams, and ER Diagrams. These cover business processes, data models, decision trees, and system architectures for quick embedding in Markdown docs.

Do I need the Mermaid CLI to export diagrams to SVG or PNG?▼

You need the Mermaid CLI installed to export diagrams to SVG or PNG files. You can install it via npm and run the command to convert your text files into graphic images for inclusion in your documentation.

Can I embed Mermaid diagrams directly in Markdown documentation?▼

You can embed Mermaid diagrams directly in Markdown by including Mermaid code blocks within your documents. This allows for easy sharing and quick visualization of workflows and data models without generating separate image files.

What is the best way to visualize data models and relationships without drawing?▼

The best way to visualize data models without drawing is using Mermaid to generate Class and ER diagrams from plain text. This lightweight syntax represents architectures and relationships human-readably, replacing verbose manual illustrations.

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