Architecture that stays readable, reviewable, and checked by code.

// 1. Define systems, apps, and dependencies once
system payment_hub "Payment Gateway" {
    description "Core authorization and settlement pipeline"
    tier "Tier-1"
    criticality "Mission-Critical"
    internet_facing true

    app payment_api "Payment API" {
        technology "ASP.NET Core"
        api_type "REST"
        
        relationships {
            this writes transaction_db "Records ledger entries"
            this flows_to payment_stream "Publishes payment events"
        }
    }
}

// 2. Declarative views compile automatically
view landscape payment_overview "Payment System Landscape" {
    include app where system == "payment_hub"
    include data_object
}