{
  "context": "This criteria evaluates how effectively the engineer uses the @emotion/unitless package to implement a performant style value processor. The focus is on correct usage of the unitless lookup object for efficient property checking and appropriate unit handling logic.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Import unitless",
      "description": "The @emotion/unitless package is imported using require() or import statement (e.g., 'const unitless = require(\"@emotion/unitless\")' or 'import unitless from \"@emotion/unitless\"')",
      "max_score": 10
    },
    {
      "name": "Direct lookup",
      "description": "Uses direct object property access on the unitless object (e.g., 'unitless[property]' or 'unitless.flex') rather than methods like hasOwnProperty, Object.keys, or Array.includes",
      "max_score": 25
    },
    {
      "name": "Correct value check",
      "description": "Checks if the unitless lookup equals 1 (e.g., 'unitless[property] === 1') or checks for undefined/falsy (e.g., 'unitless[property] !== 1' or '!unitless[property]') to determine unitless properties",
      "max_score": 20
    },
    {
      "name": "Custom property handling",
      "description": "Implements logic to detect and preserve custom CSS properties (variables starting with '--') without modification, typically using charCodeAt or string prefix checking",
      "max_score": 15
    },
    {
      "name": "Zero value handling",
      "description": "Implements logic that prevents adding units to zero values (e.g., 'value === 0' check before adding 'px')",
      "max_score": 10
    },
    {
      "name": "Type checking",
      "description": "Checks if the value is a number using 'typeof value === \"number\"' before applying unit logic",
      "max_score": 10
    },
    {
      "name": "Correct unit application",
      "description": "Adds 'px' unit only to numeric non-zero values for properties not in the unitless object (e.g., returns 'value + \"px\"' or template literal)",
      "max_score": 10
    }
  ]
}