mermaid-diagram

Generate compatibility-safe Mermaid diagrams with ASCII/Unicode sidecar text.

33|8|Updated Mar 6, 2026
One-click install
npx skills add https://github.com/Dach-Coin/claude_rules_1c --skill mermaid-diagram-dach-coin
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mermaid-diagram
Source: https://github.com/Dach-Coin/claude_rules_1c/tree/main/.claude/skills/mermaid-diagram
Command: npx skills add https://github.com/Dach-Coin/claude_rules_1c --skill mermaid-diagram-dach-coin

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill solves the problem of producing Mermaid diagrams that reliably render across common markdown viewers while still remaining understandable in plain text contexts.

Core Features & Use Cases

  • Browser/Platform-safe Mermaid output: Generates Mermaid using conservative syntax (e.g., graph LR/TB) to avoid renderer-specific breakage, with required quoting and line-break handling (<br/>).
  • Mandatory ASCII/Unicode sidecar: Outputs a synchronized text diagram immediately after the Mermaid block so agents and raw markdown users can interpret the structure.
  • Template-backed diagram creation: Provides ready-to-use patterns for flowchart, sequence, class, state, ER, journey, gantt, and safe fallbacks for quadrant/requirement/sankey/git graph.

Quick Start

Ask the AI to create a Mermaid sequenceDiagram for “User opens the WebApp, WebApp calls GET /status, and returns OK,” and also include the required text sidecar.

Frequently Asked Questions about mermaid-diagram

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

FAQPage Schema
How do I create Mermaid diagrams that render correctly across different markdown viewers?

To create Mermaid diagrams that render reliably, use conservative syntax like `graph LR/TB` and required quoting. This approach prevents renderer-specific breakage by handling line breaks via `<br/>` and sticking to supported diagram types.

What is the best way to generate a sequence diagram for technical documentation?

The best way to generate a sequence diagram for technical documentation is to pair the Mermaid code block with a synchronized ASCII/Unicode sidecar, ensuring diagram clarity and readability even in plain text contexts.

Can I use class diagrams and ER models in Mermaid without breaking the markdown spec visualization?

Yes, you can use class diagrams and ER models in Mermaid safely. By applying template-backed patterns for these supported diagram types, you ensure reliable spec visualization without triggering renderer-specific errors.

How do I add an ASCII sidecar to a Mermaid diagram?

To add an ASCII sidecar, output a synchronized text diagram immediately after the Mermaid code block. This allows agents and raw markdown users to interpret the structure even when the visual diagram fails to render.

What diagram types are supported for compatibility-safe Mermaid rendering?

Compatibility-safe Mermaid rendering supports flowcharts, sequence, class, state, ER, journey, and gantt diagrams. It also provides safe fallbacks for quadrant, requirement, sankey, and git graph diagrams to prevent rendering failures.