{"record":{"id":"a74bb67ffc23ee99","repo":"rohitg00/ai-engineering-from-scratch","slug":"packet-root-must-be-an-object","errorCode":null,"errorMessage":"packet root must be an object","messagePattern":"packet root must be an object","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"certifications/claude/lessons/03-prompting-and-task-decomposition/code/main.py","lineNumber":72,"sourceCode":"            errors.append(\"every evaluation case needs an expected behavior\")\n    return errors\n\n\ndef score_packet(packet: dict[str, Any]) -> dict[str, Any]:\n    errors = validate_packet(packet)\n    return {\n        \"passed\": not errors,\n        \"errors\": errors,\n        \"contractFields\": len(set(packet.get(\"contract\", {})) & CONTRACT_FIELDS) if isinstance(packet.get(\"contract\"), dict) else 0,\n        \"caseCoverage\": sorted({case.get(\"type\") for case in packet.get(\"evaluationCases\", []) if isinstance(case, dict)}),\n        \"stageCount\": len(packet.get(\"stages\", [])) if isinstance(packet.get(\"stages\"), list) else 0,\n    }\n\n\ndef load_packet(path: Path) -> dict[str, Any]:\n    value = json.loads(path.read_text(encoding=\"utf-8\"))\n    if not isinstance(value, dict):\n        raise ValueError(\"packet root must be an object\")\n    return value\n\n\nif __name__ == \"__main__\":\n    path = Path(__file__).parents[1] / \"outputs\" / \"prompt-contract-packet.json\"\n    print(json.dumps(score_packet(load_packet(path)), indent=2))\n","sourceCodeStart":54,"sourceCodeEnd":79,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/certifications/claude/lessons/03-prompting-and-task-decomposition/code/main.py#L54-L79","documentation":"Error \"packet root must be an object\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at certifications/claude/lessons/03-prompting-and-task-decomposition/code/main.py:72 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"}