{
  "context": "This criteria evaluates how well the engineer uses Babel's AST pattern matching capabilities to analyze JavaScript code and identify unused functions. The focus is on proper usage of @babel/parser for parsing, @babel/traverse for AST traversal with visitor patterns, and @babel/types for node type checking and scope analysis.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Parse code to AST",
      "description": "Uses @babel/parser.parse() or @babel/parser.parseExpression() to convert the input code string into an Abstract Syntax Tree",
      "max_score": 15
    },
    {
      "name": "Traverse with visitors",
      "description": "Uses @babel/traverse with visitor pattern to walk the AST, defining handlers for specific node types (e.g., FunctionDeclaration, FunctionExpression, VariableDeclarator)",
      "max_score": 25
    },
    {
      "name": "Identify function patterns",
      "description": "Uses @babel/types type checking methods (e.g., t.isFunctionDeclaration, t.isFunctionExpression, t.isIdentifier) to identify function declarations and function expressions in the AST",
      "max_score": 20
    },
    {
      "name": "Track bindings",
      "description": "Uses the Path API's scope property or binding analysis to track where functions are declared and referenced (e.g., path.scope.getBinding(), binding.referenced, binding.referencePaths)",
      "max_score": 25
    },
    {
      "name": "Extract node metadata",
      "description": "Correctly extracts function names and line numbers from AST nodes using node properties (e.g., node.id.name for function names, node.loc.start.line for line numbers)",
      "max_score": 10
    },
    {
      "name": "Error handling",
      "description": "Handles parsing errors appropriately by catching exceptions from @babel/parser and throwing or returning appropriate error messages as specified in the API",
      "max_score": 5
    }
  ]
}