{"record":{"id":"5e21a505ac3439fc","repo":"rohitg00/ai-engineering-from-scratch","slug":"runtime-discovery-failed","errorCode":null,"errorMessage":"runtime discovery failed","messagePattern":"runtime discovery failed","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"phases/19-capstone-projects/13-mcp-server-with-registry/code/main.py","lineNumber":431,"sourceCode":"        issues.append(\"runtime serverInfo.version does not match server.json version\")\n    return issues\n\n\n@dataclass\nclass Registry:\n    publisher_domain: str = PUBLISHER_DOMAIN\n    entries: dict[str, dict] = field(default_factory=dict)\n    runtime_discovery: dict[str, dict] = field(default_factory=dict)\n\n    def register(self, server: MCPServer) -> None:\n        document = server.registry_document()\n        issues = validate_registry_document(document)\n        issues.extend(validate_publisher_namespace(document, self.publisher_domain))\n        if issues:\n            raise ValueError(\"; \".join(issues))\n        discovery = server.discover(request_meta())\n        if \"error\" in discovery:\n            raise ValueError(\"runtime discovery failed\")\n        alignment_issues = validate_runtime_alignment(document, discovery)\n        if alignment_issues:\n            raise ValueError(\"; \".join(alignment_issues))\n        self.entries[server.name] = deepcopy(document)\n        self.runtime_discovery[server.name] = deepcopy(discovery)\n\n    def search(self, query: str) -> list[str]:\n        needle = query.casefold()\n        return sorted(\n            name\n            for name, entry in self.entries.items()\n            if needle in name.casefold()\n            or needle in entry[\"title\"].casefold()\n            or needle in entry[\"description\"].casefold()\n        )\n\n\ndef build_readonly_server() -> MCPServer:","sourceCodeStart":413,"sourceCodeEnd":449,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/phases/19-capstone-projects/13-mcp-server-with-registry/code/main.py#L413-L449","documentation":"Error \"runtime discovery failed\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at phases/19-capstone-projects/13-mcp-server-with-registry/code/main.py:431 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"}