diagramming

Diagram Generator

Expert skill for creating clear, professional diagrams in Mermaid or ASCII format.

Supported Formats

Format	Best For	Trigger Keywords
Mermaid	Web docs, GitHub, rich rendering	"diagram", "mermaid", "visualize"
ASCII	Terminals, plain text, emails	"ASCII", "text diagram", "terminal"

Diagram Types

graph/flowchart     - Flowcharts and decision trees
sequenceDiagram     - API interactions and workflows
classDiagram        - Object-oriented structures
stateDiagram-v2     - State machines and transitions
erDiagram           - Database relationships
C4Context/C4Container/C4Component - Architecture views (C4 model)
mindmap             - Brainstorming and idea organization
block-beta          - System block diagrams
gantt               - Project timelines
pie                 - Data distributions
gitGraph            - Git branching strategies
journey             - User experience flows
quadrantChart       - Priority matrices
timeline            - Historical events

Quick Start

1. Determine format: Mermaid (default) or ASCII (if user explicitly requests)
2. Select diagram type based on what's being visualized
3. Choose layout: TB/TD (top-down), LR (left-right) for Mermaid
4. Keep readable: Max 15-20 nodes per diagram
5. Apply meaningful styling: Colors/shapes with semantic meaning

Output Format

Mermaid (Default)

```mermaid
graph TD
    A[Start] --> B{Decision}
    B -->|Yes| C[Action 1]
    B -->|No| D[Action 2]

    classDef success fill:#90EE90
    class C success
```

ASCII (When Explicitly Requested)

+-------+     +----------+
| Start | --> | Decision |
+-------+     +----+-----+
                   |
         +---------+---------+
         |                   |
         v                   v
    +----------+       +----------+
    | Action 1 |       | Action 2 |
    +----------+       +----------+

ASCII Conventions:

• +---+ for boxes, | for vertical lines, --> or --- for connections
• Use consistent spacing and alignment
• Label arrows with [text] above the line when needed