mermaid-architect
Generate beautiful, hand-drawn Mermaid diagrams with robust syntax (quoted labels, ELK layout). Use this skill when the user asks for "diagram", "flowchart", "sequence diagram", or "visualize this process".
About this skill
The mermaid-architect skill empowers an AI agent to create a variety of high-quality Mermaid diagrams, including flowcharts for process mapping, sequence diagrams for interactions, class diagrams for software structures, and state diagrams for lifecycle management. It is designed to produce diagrams with a distinct "hand-drawn" aesthetic while adhering to robust syntax, capable of handling complex labels using quoted strings and leveraging specific layout options like ELK for clarity. This skill is invaluable for developers, architects, product managers, and anyone needing to clearly visualize complex systems, workflows, or data structures. By providing explicit guidelines for syntax, node IDs, and layout, it ensures that the generated Mermaid code is syntactically correct and results in clean, professional-looking diagrams. This consistency and adherence to best practices reduce the need for manual corrections, significantly improving efficiency in documentation and communication. Users benefit from an AI agent that can act as a dedicated "Diagram Architect & Designer," translating natural language requests into precise, renderable Mermaid code. This capability streamlines the process of communicating complex ideas visually, making it easier to share and understand technical concepts across teams.
Best use case
The primary use case is for developers, architects, and product managers who need to quickly visualize complex systems, processes, or data structures. It simplifies the creation of clear and consistent technical diagrams, improving communication and documentation efficiency for software design, API flows, and workflow analysis.
Generate beautiful, hand-drawn Mermaid diagrams with robust syntax (quoted labels, ELK layout). Use this skill when the user asks for "diagram", "flowchart", "sequence diagram", or "visualize this process".
Users should expect a valid Mermaid code block, formatted according to best practices, which can be rendered into a clear and visually appealing diagram.
Practical example
Example input
Create a sequence diagram for a user login process: User enters credentials, Frontend sends POST request to Auth API, Auth API validates with Database, Auth API returns JWT to Frontend, Frontend stores JWT and redirects to Dashboard.
Example output
```mermaid
sequenceDiagram
participant User
participant Frontend
participant Auth_API as "Authentication API"
participant Database
User->>Frontend: "Enters Credentials"
Frontend->>Auth_API: "POST /login (credentials)"
Auth_API->>Database: "Query user (username, password)"
Database-->>Auth_API: "User data | Invalid"
alt "Valid Credentials"
Auth_API-->>Frontend: "200 OK (JWT)"
Frontend->>Frontend: "Store JWT"
Frontend->>User: "Redirect to Dashboard"
else "Invalid Credentials"
Auth_API-->>Frontend: "401 Unauthorized"
Frontend->>User: "Display error message"
end
```When to use this skill
- When you need to visualize a process, workflow, or system architecture.
- When documenting API interactions, user flows, or software components in a clear, consistent format.
- When a "hand-drawn" aesthetic for diagrams is preferred over purely mechanical visuals.
- When precise Mermaid syntax, including quoted labels and specific layouts (e.g., ELK), is required for complex diagrams.
When not to use this skill
- When a non-Mermaid diagram format (e.g., PlantUML, Graphviz DOT) is explicitly required.
- When interactive diagrams or advanced diagramming features beyond Mermaid's capabilities are needed.
- When a very rough, quick sketch without strict syntax adherence is sufficient, and renderable code is not the priority.
- When the desired output is a direct image file rather than Mermaid code.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/mermaid-architect/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How mermaid-architect Compares
| Feature / Agent | mermaid-architect | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | easy | N/A |
Frequently Asked Questions
What does this skill do?
Generate beautiful, hand-drawn Mermaid diagrams with robust syntax (quoted labels, ELK layout). Use this skill when the user asks for "diagram", "flowchart", "sequence diagram", or "visualize this process".
How difficult is it to install?
The installation complexity is rated as easy. You can find the installation instructions above.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
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SKILL.md Source
# Mermaid Architect ## Usage - **Role**: Diagram Architect & Designer. - **Trigger**: "Draw this", "Make a diagram", "Visualize". - **Output**: Mermaid code block (`mermaid`) + Explanation. ## Capabilities 1. **Flowcharts**: Process mapping, decision trees. 2. **Sequence Diagrams**: API calls, user interactions. 3. **Class Diagrams**: OOP structures, database schemas. 4. **State Diagrams**: Lifecycle management. ## Guidelines - Always use **quoted strings** for node labels when they contain parentheses, commas, or colons. - Use safe node IDs: no spaces; use camelCase, PascalCase, or underscores. Avoid reserved IDs: `end`, `subgraph`, `graph`, `flowchart`. - Prefer `TD` (Top-Down) for hierarchies, `LR` (Left-Right) for timelines. - Use `subgraph id [Label]` with an explicit ID and label (no spaces in ID). - See [references/syntax-guide.md](references/syntax-guide.md) for full safe-syntax rules. ## Reference Materials - [Syntax Guide](references/syntax-guide.md) - [Example: Microservices](assets/examples/microservice-arch.mmd) - [Example: Sequence API](assets/examples/sequence-api.mmd) - [Example: State Lifecycle](assets/examples/state-lifecycle.mmd) ## Validation Run the validator on one or more `.mmd` files: ```bash scripts/validate-mmd assets/examples/*.mmd ```
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