{
  "context": "This criteria evaluates how well the engineer uses SWC's environment-based preset and usage-based polyfilling features with core-js integration. The focus is on proper configuration of SWC's env options to automatically inject polyfills based on target browsers.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "SWC transform call",
      "description": "Uses @swc/core's transform() or transformSync() method to compile the JavaScript code",
      "max_score": 15
    },
    {
      "name": "Environment preset config",
      "description": "Configures the 'env' option in SWC's jsc.transform configuration with proper targets specification",
      "max_score": 20
    },
    {
      "name": "Targets specification",
      "description": "Properly sets 'targets' in the env configuration using browserlist-compatible format (e.g., 'ie 11', 'chrome >= 60', or array of targets)",
      "max_score": 15
    },
    {
      "name": "Usage-based polyfilling",
      "description": "Enables usage-based polyfilling by setting env.mode to 'usage' to inject only necessary polyfills based on code analysis",
      "max_score": 25
    },
    {
      "name": "Core-js integration",
      "description": "Specifies core-js version in env.coreJs option (value should be 2 or 3, typically '3' or 3)",
      "max_score": 20
    },
    {
      "name": "API compliance",
      "description": "Returns compiled code in the correct format as specified in the API (object with 'code' property)",
      "max_score": 5
    }
  ]
}