{
  "_comment": "Heroku Kafka plan -> MSK sizing. DIRECT LOOKUP: read broker_instance_type / storage_per_broker_gb / max_topics / max_partitions. throughput/storage are PROVENANCE ONLY.",
  "_match": "exact, case-insensitive, on addon config.plan",
  "_on_not_found": "defer to specialist gate; append warning 'Unrecognized heroku-kafka plan tier: {plan}. Cannot determine MSK broker instance type. Deferring to specialist engagement.'; continue",
  "_broker_count_and_azs": {
    "basic": { "broker_count": 2, "availability_zones": 2 },
    "standard|extended|private": { "broker_count": 3, "availability_zones": 3 },
    "_floor": "never fewer than 2 brokers or 2 AZs"
  },
  "_topology_preservation": "max_topics from config.topics else row; max_partitions from config.partitions else row; replication_factor from config.replication_factor else default (3 for standard/extended/private, 2 for basic)",
  "rows": {
    "basic-0": {
      "tier": "basic",
      "max_topics": 20,
      "max_partitions": 40,
      "storage": "4 GB",
      "throughput": "5 MB/s",
      "broker_instance_type": "kafka.t3.small",
      "storage_per_broker_gb": 10,
      "default_replication_factor": 2
    },
    "standard-0": {
      "tier": "standard",
      "max_topics": 40,
      "max_partitions": 160,
      "storage": "50 GB",
      "throughput": "20 MB/s",
      "broker_instance_type": "kafka.m5.large",
      "storage_per_broker_gb": 100,
      "default_replication_factor": 3
    },
    "standard-1": {
      "tier": "standard",
      "max_topics": 100,
      "max_partitions": 400,
      "storage": "200 GB",
      "throughput": "50 MB/s",
      "broker_instance_type": "kafka.m5.xlarge",
      "storage_per_broker_gb": 250,
      "default_replication_factor": 3
    },
    "standard-2": {
      "tier": "standard",
      "max_topics": 200,
      "max_partitions": 1600,
      "storage": "1 TB",
      "throughput": "100 MB/s",
      "broker_instance_type": "kafka.m5.2xlarge",
      "storage_per_broker_gb": 500,
      "default_replication_factor": 3
    },
    "extended-0": {
      "tier": "extended",
      "max_topics": 200,
      "max_partitions": 2000,
      "storage": "2 TB",
      "throughput": "150 MB/s",
      "broker_instance_type": "kafka.m5.4xlarge",
      "storage_per_broker_gb": 1024,
      "default_replication_factor": 3
    },
    "extended-1": {
      "tier": "extended",
      "max_topics": 400,
      "max_partitions": 4000,
      "storage": "4 TB",
      "throughput": "200 MB/s",
      "broker_instance_type": "kafka.m5.8xlarge",
      "storage_per_broker_gb": 2048,
      "default_replication_factor": 3
    },
    "extended-2": {
      "tier": "extended",
      "max_topics": 600,
      "max_partitions": 8000,
      "storage": "8 TB",
      "throughput": "300 MB/s",
      "broker_instance_type": "kafka.m5.12xlarge",
      "storage_per_broker_gb": 4096,
      "default_replication_factor": 3
    },
    "private-extended-0": {
      "tier": "private",
      "max_topics": 200,
      "max_partitions": 2000,
      "storage": "2 TB",
      "throughput": "150 MB/s",
      "broker_instance_type": "kafka.m5.4xlarge",
      "storage_per_broker_gb": 1024,
      "default_replication_factor": 3
    },
    "private-extended-1": {
      "tier": "private",
      "max_topics": 400,
      "max_partitions": 4000,
      "storage": "4 TB",
      "throughput": "200 MB/s",
      "broker_instance_type": "kafka.m5.8xlarge",
      "storage_per_broker_gb": 2048,
      "default_replication_factor": 3
    },
    "private-extended-2": {
      "tier": "private",
      "max_topics": 600,
      "max_partitions": 8000,
      "storage": "8 TB",
      "throughput": "300 MB/s",
      "broker_instance_type": "kafka.m5.12xlarge",
      "storage_per_broker_gb": 4096,
      "default_replication_factor": 3
    }
  }
}