{
  "nodes": [
    {
      "id": "webserver-1",
      "type": "webserver",
      "position": { "x": 100, "y": 200 },
      "props": {
        "label": "API Gateway",
        "rpsCapacity": 200
      }
    },
    {
      "id": "lb-1", 
      "type": "loadbalancer",
      "position": { "x": 300, "y": 200 },
      "props": {
        "label": "API Gateway",
        "algorithm": "round-robin"
      }
    },
    {
      "id": "microservice-1",
      "type": "microservice",
      "position": { "x": 500, "y": 150 },
      "props": {
        "label": "User Service",
        "instanceCount": 3,
        "cpu": 4,
        "ramGb": 8,
        "rpsCapacity": 100,
        "monthlyUsd": 150,
        "scalingStrategy": "auto",
        "apiVersion": "v2"
      }
    },
    {
      "id": "microservice-2", 
      "type": "microservice",
      "position": { "x": 500, "y": 250 },
      "props": {
        "label": "Order Service",
        "instanceCount": 2,
        "cpu": 2,
        "ramGb": 4,
        "rpsCapacity": 80,
        "monthlyUsd": 90,
        "scalingStrategy": "manual",
        "apiVersion": "v1"
      }
    },
    {
      "id": "db-1",
      "type": "database",
      "position": { "x": 700, "y": 200 },
      "props": {
        "label": "PostgreSQL",
        "replication": 2,
        "maxRPS": 500,
        "baseLatencyMs": 15
      }
    }
  ],
  "connections": [
    {
      "source": "webserver-1",
      "target": "lb-1",
      "label": "HTTPS Requests",
      "protocol": "https",
      "tls": true
    },
    {
      "source": "lb-1", 
      "target": "microservice-1",
      "label": "User API",
      "protocol": "http"
    },
    {
      "source": "lb-1",
      "target": "microservice-2", 
      "label": "Order API",
      "protocol": "http"
    },
    {
      "source": "microservice-1",
      "target": "db-1",
      "label": "User Queries",
      "protocol": "tcp"
    },
    {
      "source": "microservice-2",
      "target": "db-1",
      "label": "Order Queries", 
      "protocol": "tcp"
    }
  ]
}