{"record":{"id":"3c9fb51774aaebfd","repo":"langchain-ai/langgraph","slug":"missing-required-config-key-runtime-key-for","errorCode":null,"errorMessage":"Missing required config key '{runtime_key}' for '{self.name}'.","messagePattern":"Missing required config key '(.+?)' for '(.+?)'\\.","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"libs/langgraph/langgraph/_internal/_runnable.py","lineNumber":415,"sourceCode":"                continue\n\n            kw_value: Any = MISSING\n            if kw == \"config\":\n                kw_value = config\n            elif kw == \"error\":\n                kw_value = config.get(CONF, {}).get(CONFIG_KEY_NODE_ERROR, MISSING)\n            elif runtime:\n                if kw == \"runtime\":\n                    kw_value = runtime\n                else:\n                    try:\n                        kw_value = getattr(runtime, runtime_key)\n                    except AttributeError:\n                        pass\n\n            if kw_value is MISSING:\n                if default is inspect.Parameter.empty:\n                    raise ValueError(\n                        f\"Missing required config key '{runtime_key}' for '{self.name}'.\"\n                    )\n                kw_value = default\n            kwargs[kw] = kw_value\n\n        if self.trace:\n            callback_manager = get_callback_manager_for_config(config, self.tags)\n            run_manager = callback_manager.on_chain_start(\n                None,\n                input,\n                name=config.get(\"run_name\") or self.get_name(),\n                run_id=config.pop(\"run_id\", None),\n            )\n            try:\n                child_config = patch_config(config, callbacks=run_manager.get_child())\n                # get the run\n                for h in run_manager.handlers:\n                    if isinstance(h, LangChainTracer):","sourceCodeStart":397,"sourceCodeEnd":433,"githubUrl":"https://github.com/langchain-ai/langgraph/blob/38031739e551638e373fb553453256c23feeb41f/libs/langgraph/langgraph/_internal/_runnable.py#L397-L433","documentation":"Error \"Missing required config key '{runtime_key}' for '{self.name}'.\" thrown in langchain-ai/langgraph.","triggerScenarios":"Thrown at libs/langgraph/langgraph/_internal/_runnable.py:415 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":"38031739e551638e373fb553453256c23feeb41f","analyzedAt":"2026-08-26T18:02:49.312Z","schemaVersion":2},"datasetVersion":"2026-08-26T21:11:00.512Z"}