{
  "context": "This evaluation assesses how well the engineer uses the mixin-deep package to implement multi-level nested property merging for a configuration management system. The focus is on correctly utilizing mixin-deep's deep merging capabilities to combine multiple configuration layers while preserving nested structure.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Uses mixin-deep",
      "description": "The solution imports and uses the mixin-deep package (or its default export) to perform the configuration merging",
      "max_score": 20
    },
    {
      "name": "Deep merge implementation",
      "description": "Uses mixin-deep to merge nested objects correctly, preserving properties at multiple nesting levels rather than replacing entire nested objects",
      "max_score": 30
    },
    {
      "name": "Multiple source merging",
      "description": "Correctly passes all three configuration objects (baseConfig, envConfig, userConfig) to mixin-deep in the proper order so later configs override earlier ones",
      "max_score": 25
    },
    {
      "name": "Non-mutating merge",
      "description": "Implements the merge in a non-mutating way by passing an empty object as the first argument to mixin-deep, preserving the original input configs",
      "max_score": 15
    },
    {
      "name": "Correct precedence",
      "description": "Ensures the correct precedence order where userConfig overrides envConfig, which overrides baseConfig, by passing arguments in the correct sequence",
      "max_score": 10
    }
  ]
}