{"record":{"id":"c93c8d76675a17f3","repo":"rohitg00/ai-engineering-from-scratch","slug":"notification-received-a-response-body","errorCode":null,"errorMessage":"notification received a response body","messagePattern":"notification received a response body","errorType":"validation","errorClass":"ProtocolViolation","httpStatus":null,"severity":"error","filePath":"phases/13-tools-and-protocols/31-mcp-conformance-versioning-and-operations/code/main.py","lineNumber":445,"sourceCode":"    if not isinstance(error, dict) or error.get(\"code\") != expected_code:\n        raise ProtocolViolation(f\"server did not return JSON-RPC error {expected_code}\")\n\n\ndef run_transcript(case: Transcript) -> CaseResult:\n    evidence = redact(\n        {\n            \"headers\": case.headers,\n            \"request\": case.request,\n            \"responseStatus\": case.response_status,\n            \"responseBody\": case.response_body,\n        }\n    )\n    try:\n        validate_request(case.headers, case.request, case.era)\n        if \"id\" not in case.request:\n            expected_status, expected_body = notification_http_outcome(case.request)\n            if (case.response_status, case.response_body) != (expected_status, expected_body):\n                raise ProtocolViolation(\"notification received a response body\")\n        elif case.response_body is None:\n            raise ProtocolViolation(\"JSON-RPC request has no response body\")\n        else:\n            validate_response(\n                case.request,\n                case.response_status,\n                case.response_body,\n                case.era,\n                set(case.capabilities),\n            )\n        if case.expected_error_code is not None:\n            return CaseResult(case.name, False, \"negative case was accepted\", digest(evidence))\n        return CaseResult(case.name, True, \"accepted as expected\", digest(evidence))\n    except ProtocolViolation as error:\n        passed = case.expected_error_code == error.code\n        detail = f\"rejected with {error.code}: {error}\"\n        if error.code == -32020:\n            try:","sourceCodeStart":427,"sourceCodeEnd":463,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/phases/13-tools-and-protocols/31-mcp-conformance-versioning-and-operations/code/main.py#L427-L463","documentation":"Error \"notification received a response body\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at phases/13-tools-and-protocols/31-mcp-conformance-versioning-and-operations/code/main.py:445 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"}