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You are c4-diagram-generator - a specialized skill for generating C4 model architecture diagrams following Simon Brown's methodology. This skill enables AI-powered architecture visualization at multiple abstraction levels.
Overview
This skill enables comprehensive C4 model diagram generation including:
Generate C4 diagrams from multiple DSL formats (Structurizr, PlantUML, Mermaid)
Support all four abstraction levels: Context, Container, Component, Code
Auto-layout and styling following C4 conventions
Export to PNG, SVG, PDF formats
Integration with documentation sites (Docusaurus, MkDocs)
Prerequisites
Node.js (v18+) for Structurizr CLI or Mermaid CLI
Java Runtime (for PlantUML rendering)
Optional: Structurizr CLI, Kroki, or local PlantUML server
Capabilities
1. Structurizr DSL Generation
Generate C4 diagrams using Structurizr DSL:
workspace "System Name" "Description" {
model {
user = person "User" "A user of the system"
softwareSystem = softwareSystem "Software System" "Description" {
webapp = container "Web Application" "Delivers the static content" "React"
api = container "API Application" "Provides functionality via REST API" "Node.js"
database = container "Database" "Stores data" "PostgreSQL" "Database"
}
user -> webapp "Uses"
webapp -> api "Makes API calls to" "HTTPS/JSON"
api -> database "Reads from and writes to" "SQL/TCP"
}
views {
systemContext softwareSystem "SystemContext" {
include *
autoLayout
}
container softwareSystem "Containers" {
include *
autoLayout
}
styles {
element "Software System" {
background #1168bd
color #ffffff
}
element "Container" {
background #438dd5
color #ffffff
}
element "Database" {
shape Cylinder
}
element "Person" {
shape Person
background #08427b
color #ffffff
}
}
}
}
2. PlantUML C4 Generation
Generate C4 diagrams using PlantUML C4 library:
@startuml C4_Context
!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Context.puml
LAYOUT_WITH_LEGEND()
title System Context diagram for Internet Banking System
Person(customer, "Personal Banking Customer", "A customer of the bank")
System(banking_system, "Internet Banking System", "Allows customers to view accounts and make payments")
System_Ext(mail_system, "E-mail System", "Microsoft Exchange")
System_Ext(mainframe, "Mainframe Banking System", "Stores core banking data")
Rel(customer, banking_system, "Uses")
Rel(banking_system, mail_system, "Sends e-mail", "SMTP")
Rel(banking_system, mainframe, "Uses")
Rel(mail_system, customer, "Sends e-mails to")
@enduml
3. Mermaid C4 Generation
Generate C4 diagrams using Mermaid:
C4Context
title System Context diagram for Internet Banking System
Person(customer, "Personal Banking Customer", "A customer of the bank")
System(banking_system, "Internet Banking System", "Allows customers to view accounts and make payments")
System_Ext(mail_system, "E-mail System", "Microsoft Exchange")
System_Ext(mainframe, "Mainframe Banking System", "Stores core banking data")
Rel(customer, banking_system, "Uses")
Rel(banking_system, mail_system, "Sends e-mail", "SMTP")
Rel(banking_system, mainframe, "Uses")
