{
  "_comment": "Tunable estimate-phase assumptions for the heroku-to-aws skill (the heuristic knobs an org adjusts, independent of the cost algorithm and the AWS rate table). AWS rates live in references/vendored/pricing/aws-infra-pricing.json; cost FORMULAS and tier/heuristic logic stay in estimate.md prose. Complexity-tier bands are NOT here (thresholds live in references/vendored/estimate/complexity-tiers.json; timelines are inline in estimate-cost-engine.md).",
  "log_volume_gb_per_service": {
    "_comment": "Per-service monthly CloudWatch log-volume heuristic, counted PER DESIGNED SERVICE (MSK is per broker). Used by the observability cost step. Heuristic because Heroku's logging model differs, so source billing doesn't apply.",
    "fargate_task": 3,
    "eb_environment": 3,
    "rds_or_aurora_instance": 1,
    "alb": 2,
    "nat_gateway": 1,
    "elasticache_node": 0.5,
    "msk_broker": 2
  },
  "optimization_savings_ranges": {
    "_comment": "Estimated savings RANGES per post-migration optimization opportunity, shown beyond the Balanced on-demand baseline. Ranges only (the LLM emits the full optimization_opportunities[] entry, with descriptions/references, from estimate.md prose). target_services / timing gate which opportunities are relevant to the designed architecture and match the emitted entry field names.",
    "compute_savings_plans": {
      "savings_percent": "20-66%",
      "target_services": [
        "Fargate",
        "Elastic Beanstalk"
      ],
      "timing": "Post-migration (after 30-90 day baseline)"
    },
    "database_savings_plans": {
      "_comment": "target_services here is the FULL Database-SP-eligible list per references/vendored/estimate/ri-sp-eligibility.md. ElastiCache is included ONLY when the design's actual target engine is Valkey — Redis OSS/Memcached (heroku-to-aws's default Redis mapping) is Database-SP-ineligible and must fall through to elasticache_reserved_nodes below instead. DynamoDB provisioned is also RI-eligible (see dynamodb_reserved_capacity) and mutually exclusive with Database SP on the same capacity; DynamoDB on-demand is Database-SP-eligible only.",
      "savings_percent": "up to 35% (serverless) / ~20% (provisioned)",
      "target_services": [
        "Aurora",
        "RDS",
        "DynamoDB",
        "ElastiCache (Valkey only)"
      ],
      "timing": "Post-migration or after right-sizing"
    },
    "rds_reserved_instances": {
      "savings_percent": "up to 69%",
      "target_services": [
        "RDS",
        "Aurora (provisioned)"
      ],
      "timing": "Post-migration (after architecture stabilizes)"
    },
    "dynamodb_reserved_capacity": {
      "_comment": "DynamoDB reserved capacity is restricted to provisioned, Standard table class usage — explicitly NOT available for on-demand or Standard-IA tables (see ri-sp-eligibility.md). Mutually exclusive with Database Savings Plans on the same capacity.",
      "savings_percent": "up to 54% (1-year) / up to 77% (3-year)",
      "target_services": [
        "DynamoDB (provisioned, Standard table class only)"
      ],
      "timing": "Post-migration (after usage baseline)"
    },
    "elasticache_reserved_nodes": {
      "_comment": "The commitment lever for ElastiCache when the target engine is Redis OSS or Memcached, which Database Savings Plans do not cover (Valkey-only). heroku-to-aws's default Heroku Redis mapping targets Redis OSS, so this is the applicable entry unless Design selected Valkey.",
      "savings_percent": "30-55%",
      "target_services": [
        "ElastiCache (Redis OSS or Memcached)"
      ],
      "timing": "Post-migration (after usage baseline)"
    },
    "s3_intelligent_tiering": {
      "savings_percent": "38-50%",
      "target_services": [
        "S3 storage"
      ],
      "timing": "During migration"
    },
    "fargate_spot": {
      "savings_percent": "60-70%",
      "target_services": [
        "Non-critical/batch Fargate tasks"
      ],
      "timing": "If worker dynos exist"
    },
    "ec2_spot": {
      "savings_percent": "60-90%",
      "target_services": [
        "Elastic Beanstalk worker environments"
      ],
      "timing": "during migration for interruption-tolerant SingleInstance workers"
    }
  }
}