{"record":{"id":"0d1d71df8e8a7380","repo":"rohitg00/ai-engineering-from-scratch","slug":"32022-0d1d71","errorCode":"-32022","errorMessage":"unsupported protocol version: {protocol_version}","messagePattern":"unsupported protocol version: (.+?)","errorType":"exception","errorClass":"ProtocolViolation","httpStatus":null,"severity":"error","filePath":"phases/13-tools-and-protocols/31-mcp-conformance-versioning-and-operations/code/main.py","lineNumber":223,"sourceCode":"\n    mirrored = {\n        \"mcp-protocol-version\": protocol_version,\n        \"mcp-method\": body[\"method\"],\n    }\n    name = routing_name(body)\n    if name is not None:\n        mirrored[\"mcp-name\"] = name\n    for header, body_value in mirrored.items():\n        header_value = wire_headers.get(header)\n        if header == \"mcp-name\" and header_value is not None:\n            header_value = decode_header_value(header_value)\n        if header_value != body_value:\n            raise ProtocolViolation(\n                f\"{header} does not match the JSON-RPC body\",\n                -32020,\n            )\n    if protocol_version != MODERN_VERSION:\n        raise ProtocolViolation(f\"unsupported protocol version: {protocol_version}\", -32022)\n\n\ndef allowed_result_types(capabilities: set[str]) -> set[str]:\n    allowed = set(CORE_RESULT_TYPES)\n    for capability in capabilities:\n        allowed.update(EXTENSION_RESULT_TYPES.get(capability, set()))\n    return allowed\n\n\ndef validate_result(\n    result: dict[str, Any],\n    era: str,\n    capabilities: set[str] | None = None,\n) -> dict[str, Any]:\n    if not isinstance(result, dict):\n        raise ProtocolViolation(\"result must be an object\")\n    preserved = dict(result)\n    result_type = result.get(\"resultType\")","sourceCodeStart":205,"sourceCodeEnd":241,"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#L205-L241","documentation":"Error \"unsupported protocol version: {protocol_version}\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at phases/13-tools-and-protocols/31-mcp-conformance-versioning-and-operations/code/main.py:223 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"}