{
  "context": "This criteria evaluates how well the engineer uses the nodeenv package's advanced npm version management capabilities, specifically focusing on version-specific installation, legacy version handling, environment isolation, and cleanup operations.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Specific npm version installation",
      "description": "Uses nodeenv's --npm option or equivalent API to install a specific npm version (e.g., nodeenv's npm parameter in create_environment or install_packages functions)",
      "max_score": 20
    },
    {
      "name": "Latest version fetching",
      "description": "Implements logic to fetch the latest npm version, ideally using nodeenv's get_last_stable_node_version pattern or similar version discovery mechanism from nodeenv",
      "max_score": 15
    },
    {
      "name": "Legacy version detection",
      "description": "Uses nodeenv's version parsing utilities (parse_version) or similar functionality to differentiate between npm versions < 1.0.0 and >= 1.0.0",
      "max_score": 15
    },
    {
      "name": "Version-specific installation commands",
      "description": "Implements different installation logic for legacy (npm 0.x) versus modern npm versions, mirroring nodeenv's approach to handling npm version differences",
      "max_score": 15
    },
    {
      "name": "NPM_CONFIG_PREFIX setup",
      "description": "Sets the NPM_CONFIG_PREFIX environment variable to the installation directory, following nodeenv's environment isolation pattern",
      "max_score": 10
    },
    {
      "name": "npm_config_prefix lowercase",
      "description": "Also sets the lowercase npm_config_prefix variable for backward compatibility, as nodeenv does",
      "max_score": 10
    },
    {
      "name": "Legacy cleanup logic",
      "description": "Implements cleanup of npm 0.x artifacts when appropriate, using subprocess calls or file operations similar to nodeenv's cleanup approach",
      "max_score": 10
    },
    {
      "name": "Conditional cleanup",
      "description": "Makes cleanup operations conditional based on a flag (cleanup_legacy parameter), following nodeenv's --no-npm-clean pattern",
      "max_score": 5
    }
  ]
}