{
  "context": "This criteria evaluates how well the engineer uses react-addons-shallow-compare's Object.is()-based equality checking to implement a shallow props comparison function. The focus is on correctly utilizing the package's shallowEqual utility or understanding its underlying Object.is() semantics.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Package import",
      "description": "Correctly imports react-addons-shallow-compare or accesses its shallowEqual utility function",
      "max_score": 15
    },
    {
      "name": "NaN handling",
      "description": "Uses Object.is() or the package's shallowEqual function to correctly treat NaN as equal to NaN (returns true for NaN === NaN)",
      "max_score": 25
    },
    {
      "name": "Zero distinction",
      "description": "Uses Object.is() or the package's shallowEqual function to correctly distinguish between +0 and -0 (returns false for +0 === -0)",
      "max_score": 25
    },
    {
      "name": "Shallow comparison",
      "description": "Implements shallow comparison that compares only enumerable own properties using Object.keys() and hasOwnProperty, consistent with the package's approach",
      "max_score": 20
    },
    {
      "name": "Property count check",
      "description": "Verifies both objects have the same number of properties before comparing values, following the package's optimization pattern",
      "max_score": 15
    }
  ]
}