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Render and preview Mermaid diagrams in browser with support for flowcharts, sequence diagrams, class diagrams, and more
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/veelenga/preview-skills --skill preview-mermaid命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
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正在显示 SKILL.md
| name | preview-mermaid |
| description | Render and preview Mermaid diagrams in browser with support for flowcharts, sequence diagrams, class diagrams, and more |
| user-invocable | true |
| commands | ["preview-mermaid"] |
Interactive Mermaid diagram viewer that renders flowcharts, sequence diagrams, class diagrams, ER diagrams, state diagrams, Gantt charts, pie charts, and more.
When the user asks to preview a Mermaid diagram, DO NOT build HTML manually. Use the Bash tool to execute this skill's run.sh script:
# Preview a file
./run.sh diagram.mmd
# Pipe content
echo "graph TD
A-->B" | ./run.sh
The script handles all HTML generation and automatically opens the result in the browser. Do NOT open the file manually to avoid duplicate tabs.
# Preview a Mermaid diagram file
/preview-mermaid diagram.mmd
# Pipe Mermaid content (preferred for temporary content)
cat flowchart.mermaid | /preview-mermaid
echo "graph TD\n A-->B" | /preview-mermaid
/preview-mermaid sequence.mmd --background
Best Practice: For temporary or generated content, prefer piping over creating temporary files. This avoids cluttering your filesystem and the content is automatically cleaned up.
The script works with sensible defaults but supports these flags for flexibility:
-o, --output PATH - Custom output path--no-browser - Skip browser, output file path onlyUse this skill when the user wants to:
Natural language requests:
.mmd, .mermaidgraph TD
A[Start] --> B{Decision}
B -->|Yes| C[Process]
B -->|No| D[End]
C --> D
sequenceDiagram
Alice->>John: Hello John!
John-->>Alice: Great to hear from you!
classDiagram
Animal <|-- Duck
Animal : +int age
Animal: +isMammal()
stateDiagram-v2
[*] --> Still
Still --> Moving
Moving --> Still
Moving --> Crash
Crash --> [*]
The skill generates a standalone HTML file at:
.preview-skills/mermaid/{filename}.html
The file is self-contained and can be:
This skill is standalone and includes all dependencies:
lib/templates/To modify the skill:
config.sh for configurationtemplates/scripts/mermaid-renderer.js for behaviortemplates/styles/diagram.css for stylingrun.sh to test changesFor Mermaid syntax and examples:
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