Mermaid Diagram

Generate valid Mermaid diagrams like flowcharts, sequence diagrams, mind maps, ER diagrams, or user journeys from text or product descriptions.

Security Scan

An instruction-only Mermaid diagram generator that requests no credentials, installs nothing, and whose instructions and reference templates are consistent with its stated purpose.

Purpose & Capability

Name and description match the SKILL.md and the included reference patterns; there are no unrelated environment variables, binaries, or config paths requested.

Instruction Scope

Runtime instructions are limited to producing Mermaid code blocks, choosing diagram types, formatting rules, and using the provided pattern file. They do not instruct reading system files, environment variables, or contacting external endpoints.

Install Mechanism

No install spec and no code files to write/execute. As an instruction-only skill, it has minimal footprint and does not download or run external code.

Credentials

The skill declares no required environment variables, credentials, or config paths. Nothing in SKILL.md accesses secrets or unrelated services.

Persistence & Privilege

always is false and the skill is user-invocable; it does not request persistent or elevated privileges nor modify other skills or system settings.

Assessment

This skill is low-risk: it only contains instructions and template examples for emitting Mermaid diagrams and asks for no credentials or installs. Before using, avoid pasting sensitive secrets or non-public architecture details into prompts (the skill will include any input text into the generated diagrams). Also note that the agent may invoke this skill autonomously if enabled by your agent settings (normal behavior), so control when and how the agent is allowed to produce or share diagrams that include private information.

Mermaid Diagram Generator

Generate valid Mermaid diagram code from text descriptions.

Diagram Type Selection

需求	推荐类型	Mermaid 关键字
业务流程 / 逻辑流程	Flowchart	flowchart TD
系统交互 / API 时序	Sequence	sequenceDiagram
产品架构 / 系统结构	Flowchart / C4	flowchart LR
状态机 / 用户状态	State	stateDiagram-v2
脑图 / 功能树	Mindmap	mindmap
数据库结构	ER	erDiagram
项目时间线	Timeline	timeline
用户旅程	Journey	journey

Output Rules

1. Always wrap output in ```mermaid code blocks
2. Use Chinese labels when the user writes in Chinese
3. Add comments (%%) for complex diagrams to explain sections
4. Keep node names short (≤10 chars) to avoid layout issues
5. Validate syntax mentally before outputting — common mistakes:
   • Missing quotes around labels with spaces/Chinese
   • Wrong arrow syntax (--> vs --- vs ->>)
   • Unclosed brackets

Quick Syntax Reference

flowchart TD
    A[开始] --> B{判断条件}
    B -- 是 --> C[执行操作]
    B -- 否 --> D[结束]
    C --> D

sequenceDiagram
    用户->>服务端: 发起请求
    服务端->>数据库: 查询数据
    数据库-->>服务端: 返回结果
    服务端-->>用户: 响应

mindmap
  root((产品名))
    功能A
      子功能1
      子功能2
    功能B

Reference Files

• references/diagram-patterns.md — 产品经理常用图模式（带完整示例代码）

Read when: user asks for a specific diagram type or needs a complex multi-node diagram.