{
  "context": "This criteria evaluates how well the engineer uses mathjs's user-defined function capabilities to implement a custom function calculator. The focus is on proper use of the parser() function and its ability to define and evaluate custom functions within expressions.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Uses parser instance",
      "description": "Creates and uses a mathjs parser() instance to maintain persistent scope for function definitions",
      "max_score": 25
    },
    {
      "name": "Function definition via evaluate",
      "description": "Uses parser.evaluate() to define custom functions using the 'f(x) = ...' syntax rather than manually parsing or storing formulas",
      "max_score": 30
    },
    {
      "name": "Expression evaluation",
      "description": "Uses parser.evaluate() to evaluate expressions that contain calls to user-defined functions",
      "max_score": 25
    },
    {
      "name": "Handles multiple parameters",
      "description": "Correctly implements support for multi-parameter functions (e.g., 'f(x, y, z) = ...') using the parser's native capabilities",
      "max_score": 20
    }
  ]
}