Layering

Layering keeps your architecture modular. Higher layers depend on lower ones, not the other way around.

Allowed Direction

import { * } from 'sruja.ai/stdlib'


App = system "App" {
  WebApp = container "Web App"
  API = container "API"
  DB = database "Database"
}

App.WebApp -> App.API "Calls"
App.API -> App.DB "Reads/Writes"

view index {
include *
}

Violation Example

// EXPECTED_FAILURE: Layer violation
import { * } from 'sruja.ai/stdlib'


App = system "App" {
  WebApp = container "Web App"
  API = container "API Service"
}

App.API -> App.WebApp "Returns UI"

This causes a layer violation. Fix by:

• Inverting the dependency (WebApp depends on an interface exposed by API)
• Using events/messages instead of direct upward calls

See Also

• Scenario
• Validation