{"record":{"id":"e86ba091678dda93","repo":"rohitg00/ai-engineering-from-scratch","slug":"benchmark-root-must-be-an-object","errorCode":null,"errorMessage":"benchmark root must be an object","messagePattern":"benchmark root must be an object","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"certifications/claude/lessons/02-model-selection-and-token-economics/code/main.py","lineNumber":313,"sourceCode":"\ndef _nonempty_strings(value: Any) -> bool:\n    return isinstance(value, list) and bool(value) and all(isinstance(item, str) and item.strip() for item in value)\n\n\ndef _iso_date(value: Any) -> bool:\n    if not isinstance(value, str):\n        return False\n    try:\n        date.fromisoformat(value)\n        return True\n    except ValueError:\n        return False\n\n\ndef load_benchmark(path: Path) -> dict[str, Any]:\n    value = json.loads(path.read_text(encoding=\"utf-8\"))\n    if not isinstance(value, dict):\n        raise ValueError(\"benchmark root must be an object\")\n    return value\n\n\ndef load_mode_trials(path: Path) -> dict[str, Any]:\n    value = json.loads(path.read_text(encoding=\"utf-8\"))\n    if not isinstance(value, dict):\n        raise ValueError(\"mode-trials root must be an object\")\n    return value\n\n\nif __name__ == \"__main__\":\n    outputs = Path(__file__).parents[1] / \"outputs\"\n    benchmark = load_benchmark(outputs / \"model-routing-benchmark.json\")\n    mode_trials = load_mode_trials(outputs / \"mode-trials.json\")\n    errors = validate_benchmark(benchmark) + validate_mode_trials(mode_trials)\n    print(\n        json.dumps(\n            {","sourceCodeStart":295,"sourceCodeEnd":331,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/certifications/claude/lessons/02-model-selection-and-token-economics/code/main.py#L295-L331","documentation":"Error \"benchmark root must be an object\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at certifications/claude/lessons/02-model-selection-and-token-economics/code/main.py:313 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"39ea8a1c6d0b61f071226eff7ede4d4105fed820","analyzedAt":"2026-08-26T03:13:46.626Z","schemaVersion":2},"datasetVersion":"2026-08-26T07:17:17.940Z"}