Detalle del Skill
diagram-generator
Generates architecture and system diagrams using Mermaid and HTML.
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SKILL.md
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---
name: diagram-generator
description: Generates architecture, database, and system diagrams using Mermaid syntax. Creates visual representations of system architecture, database schemas, component relationships, data flows, and standalone HTML exports.
version: 1.4.0
model: sonnet
invoked_by: both
user_invocable: true
tools: [Read, Write, Glob, Grep]
best_practices:
- Use Mermaid syntax for all diagrams
- Extract structure from code and documentation
- Keep diagrams under 200 nodes
- Generate both high-level and detailed views
error_handling: graceful
streaming: supported
templates: [architecture-diagram, database-diagram, component-diagram, sequence-diagram]
verified: true
lastVerifiedAt: 2026-03-15T00:00:00.000Z
source: builtin
trust_score: 100
provenance_sha: be44b78f364f1c89
---
<identity>
Diagram Generator — creates Mermaid diagrams and standalone HTML exports for architecture, schemas, flows, and all supported diagram types.
</identity>
## Diagram Types
| Type | Keyword | Best For |
| --------- | ----------------- | --------------------------- |
| Flowchart | `flowchart TB/LR` | Decision flows, processes |
| Sequence | `sequenceDiagram` | API interactions, protocols |
| Class | `classDiagram` | OOP structure, interfaces |
| State | `stateDiagram-v2` | Lifecycle, state machines |
| ER | `erDiagram` | Database schemas |
| Gantt | `gantt` | Project timelines |
| Pie | `pie` | Distribution, composition |
| Mindmap | `mindmap` | Hierarchical mind maps |
| Timeline | `timeline` | Chronological events |
| Git Graph | `gitGraph` | Branch visualization |
| Kanban | `kanban` | Task boards |
| Quadrant | `quadrantChart` | 2x2 matrix |
## Processing Limits
- **File chunk limit: 1000 files per diagram (HARD LIMIT)**
- Visual limit: ~200 nodes max per diagram
- Large codebases: split by subsystem/layer; generate overview first then details
## Standalone HTML Output Mode
**Trigger phrases:** "export as HTML", "standalone diagram", "interactive diagram"
Generate a self-contained HTML file with embedded Mermaid.js CDN, dark/light toggle button, and responsive CSS (max-width: 1200px):
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>TITLE</title>
<script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
<script>
mermaid.initialize({ startOnLoad: true, theme: 'dark' });
</script>
<style>
body {
font-family: system-ui;
max-width: 1200px;
margin: 2rem auto;
background: #1e1e2e;
color: #cdd6f4;
}
</style>
</head>
<body>
<h1>TITLE</h1>
<button
onclick="let d=!d;mermaid.initialize({startOnLoad:false,theme:d?'dark':'default'});document.querySelector('.mermaid').removeAttribute('data-processed');mermaid.run()"
>
Toggle Theme
</button>
<div class="mermaid">MERMAID_CONTENT</div>
</body>
</html>
```
**Default:** dark mode (`background: #1e1e2e`, `color: #cdd6f4`)
**Output:** `.claude/context/artifacts/diagrams/{subject}-{YYYY-MM-DD}.html`
## Output Location
- Mermaid files: `.claude/context/artifacts/diagrams/{subject}-{type}-{YYYY-MM-DD}.mmd`
- HTML files: `.claude/context/artifacts/diagrams/{subject}-{YYYY-MM-DD}.html`
## Iron Laws
1. Mermaid syntax only — no ASCII art or PlantUML.
2. Never exceed 200 nodes per diagram.
3. Never write diagrams outside `.claude/context/artifacts/diagrams/`.
4. Label all non-obvious connections.
5. Enforce 1000-file hard limit — chunk large codebases.
## Mermaid Plugin Generation Pattern
Generate diagrams from code analysis using the Claude Code plugin pattern (ref: agentic-coding-school/mermaid-diagram-plugin):
### Step 1: Analyze Codebase Structure
```bash
# Identify components to diagram
pnpm search:Leer la fuente completa en GitHub (abre una página externa)