mermaid-diagramming

Generate syntactically valid Mermaid diagrams for architecture, flows, and technical documentation.

Updated Jun 28, 2026
One-click install
npx skills add https://github.com/JaviMontano/claude-plugins --skill mermaid-diagramming-javimontano
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: mermaid-diagramming
Source: https://github.com/JaviMontano/claude-plugins/tree/main/plugins/claude-native-toolkit/skills/mermaid-diagramming
Command: npx skills add https://github.com/JaviMontano/claude-plugins --skill mermaid-diagramming-javimontano

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) and assets (resource) components.

What problem does it solve? Writing architecture and process documentation often requires diagrams, but hand-crafting Mermaid syntax is error-prone and diagrams frequently fail to render or add no informational value. This Skill produces validated, semantically precise Mermaid diagrams that compress complex information into clear visuals. ## Core Features & Use Cases - Diagram Type Selection: Automatically maps content patterns to the right Mermaid type — C4 context/container, flowchart, sequence, ER, state, Gantt, mindmap, quadrant, class, gitgraph, and journey diagrams. - Composition & Validation Rules: Enforces syntax validity for Mermaid v10+, a 20-node limit, labeled edges, semantic styling, and accessibility text summaries for every figure. - Deliverable Integration: Embeds diagrams in Markdown or HTML deliverables with figure numbering and evidence tags, following a per-deliverable diagram catalog. - Use Case: Given a documented checkout architecture, produce a C4 container diagram plus a sequence diagram of the API authentication flow, ready to embed in a technical analysis document. ## Quick Start Ask the assistant to create a Mermaid sequence diagram of your API authentication flow using the mermaid-diagramming skill.

Frequently Asked Questions about mermaid-diagramming

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

FAQPage Schema
How do I create a Mermaid diagram for system architecture?▼

Provide the source material describing components and relationships, and the skill selects the appropriate type — typically a C4 Context or Container diagram for architecture. It outputs validated Mermaid code with labeled relationships and an accessibility summary.

What Mermaid diagram types are supported?▼

Supported types include C4Context, C4Container, flowchart, sequenceDiagram, erDiagram, stateDiagram-v2, gantt, mindmap, quadrantChart, classDiagram, gitGraph, and journey. The type is auto-selected from content patterns unless explicitly requested.

Can Mermaid diagrams be exported as PNG or SVG images?▼

No, the output is Mermaid code only and cannot generate raster images like PNG or SVG directly. C4 diagrams use Mermaid's C4 extension, which may not render in all contexts, so a compatibility caveat is disclosed.

Why should a large system be split into multiple Mermaid diagrams?▼

Diagrams are capped at 20 nodes to preserve readability and quick comprehension. Systems exceeding that limit are split into multiple cross-referenced diagrams rather than one overloaded view.

When should I use a table instead of a Mermaid diagram?▼

Use a table when presenting metrics, scores, or comparisons such as latency percentiles or cost figures. Diagrams are skipped when they would merely repeat what the text or table already communicates clearly.