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Architecture Diagram

Generate dark-themed SVG diagrams of software systems and cloud infrastructure as standalone HTML files with inline SVG graphics. Semantic component colors (cyan=frontend, emerald=backend, violet=database, amber=cloud/AWS, rose=security, orange=message bus), JetBrains Mono font, grid background. Best suited for software architecture, cloud/VPC topology, microservice maps, service-mesh diagrams, database + API layer diagrams, security groups, message buses — anything that fits a tech-infra deck with a dark aesthetic. If a more specialized diagramming skill exists for the subject (scientific, educational, hand-drawn, animated, etc.), prefer that — otherwise this skill can also serve as a general-purpose SVG diagram fallback. Based on Cocoon AI's architecture-diagram-generator (MIT).

Skill metadata​

SourceBundled (installed by default)
Pathskills/creative/architecture-diagram
Version1.0.0
AuthorCocoon AI (hello@cocoon-ai.com), ported by Hermes Agent
LicenseMIT
Tagsarchitecture, diagrams, SVG, HTML, visualization, infrastructure, cloud
Related skillsconcept-diagrams, excalidraw

Reference: full SKILL.md​

信息

The following is the complete skill definition that Hermes loads when this skill is triggered. This is what the agent sees as instructions when the skill is active.

Architecture Diagram Skill

Generate professional, dark-themed technical architecture diagrams as standalone HTML files with inline SVG graphics. No external tools, no API keys, no rendering libraries — just write the HTML file and open it in a browser.

Scope​

Best suited for:

  • Software system architecture (frontend / backend / database layers)
  • Cloud infrastructure (VPC, regions, subnets, managed services)
  • Microservice / service-mesh topology
  • Database + API map, deployment diagrams
  • Anything with a tech-infra subject that fits a dark, grid-backed aesthetic

Look elsewhere first for:

  • Physics, chemistry, math, biology, or other scientific subjects
  • Physical objects (vehicles, hardware, anatomy, cross-sections)
  • Floor plans, narrative journeys, educational / textbook-style visuals
  • Hand-drawn whiteboard sketches (consider excalidraw)
  • Animated explainers (consider an animation skill)

If a more specialized skill is available for the subject, prefer that. If none fits, this skill can also serve as a general SVG diagram fallback — the output will just carry the dark tech aesthetic described below.

Based on Cocoon AI's architecture-diagram-generator (MIT).

Workflow​

  1. User describes their system architecture (components, connections, technologies)
  2. Generate the HTML file following the design system below
  3. Save with write_file to a .html file (e.g. ~/architecture-diagram.html)
  4. User opens in any browser — works offline, no dependencies

Output Location​

Save diagrams to a user-specified path, or default to the current working directory:

./[project-name]-architecture.html

Preview​

After saving, suggest the user open it:

# macOS
open ./my-architecture.html
# Linux
xdg-open ./my-architecture.html

Design System & Visual Language​

Color Palette (Semantic Mapping)​

Use specific rgba fills and hex strokes to categorize components:

Component TypeFill (rgba)Stroke (Hex)
Frontendrgba(8, 51, 68, 0.4)#22d3ee (cyan-400)
Backendrgba(6, 78, 59, 0.4)#34d399 (emerald-400)
Databasergba(76, 29, 149, 0.4)#a78bfa (violet-400)
AWS/Cloudrgba(120, 53, 15, 0.3)#fbbf24 (amber-400)
Securityrgba(136, 19, 55, 0.4)#fb7185 (rose-400)
Message Busrgba(251, 146, 60, 0.3)#fb923c (orange-400)
Externalrgba(30, 41, 59, 0.5)#94a3b8 (slate-400)

Typography & Background​

  • Font: JetBrains Mono (Monospace), loaded from Google Fonts
  • Sizes: 12px (Names), 9px (Sublabels), 8px (Annotations), 7px (Tiny labels)
  • Background: Slate-950 (#020617) with a subtle 40px grid pattern
<!-- Background Grid Pattern -->
<pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse">
  <path d="M 40 0 L 0 0 0 40" fill="none" stroke="#1e293b" stroke-width="0.5"/>
</pattern>

Technical Implementation Details​

Component Rendering​

Components are rounded rectangles (rx="6") with 1.5px strokes. To prevent arrows from showing through semi-transparent fills, use a double-rect masking technique:

  1. Draw an opaque background rect (#0f172a)
  2. Draw the semi-transparent styled rect on top

Connection Rules​

  • Z-Order: Draw arrows early in the SVG (after the grid) so they render behind component boxes
  • Arrowheads: Defined via SVG markers
  • Security Flows: Use dashed lines in rose color (#fb7185)
  • Boundaries:
    • Security Groups: Dashed (4,4), rose color
    • Regions: Large dashed (8,4), amber color, rx="12"

Spacing & Layout Logic​

  • Standard Height: 60px (Services); 80-120px (Large components)
  • Vertical Gap: Minimum 40px between components
  • Message Buses: Must be placed in the gap between services, not overlapping them
  • Legend Placement: CRITICAL. Must be placed outside all boundary boxes. Calculate the lowest Y-coordinate of all boundaries and place the legend at least 20px below it.

Document Structure​

The generated HTML file follows a four-part layout:

  1. Header: Title with a pulsing dot indicator and subtitle
  2. Main SVG: The diagram contained within a rounded border card
  3. Summary Cards: A grid of three cards below the diagram for high-level details
  4. Footer: Minimal metadata

Info Card Pattern​

<div class="card">
  <div class="card-header">
    <div class="card-dot cyan"></div>
    <h3>Title</h3>
  </div>
  <ul>
    <li>• Item one</li>
    <li>• Item two</li>
  </ul>
</div>

Output Requirements​

  • Single File: One self-contained .html file
  • No External Dependencies: All CSS and SVG must be inline (except Google Fonts)
  • No JavaScript: Use pure CSS for any animations (like pulsing dots)
  • Compatibility: Must render correctly in any modern web browser

Template Reference​

Load the full HTML template for the exact structure, CSS, and SVG component examples:

skill_view(name="architecture-diagram", file_path="templates/template.html")

The template contains working examples of every component type (frontend, backend, database, cloud, security), arrow styles (standard, dashed, curved), security groups, region boundaries, and the legend — use it as your structural reference when generating diagrams.