4 errors

Argument of type "BaseMessage" cannot be assigned to parameter "msg" of type "BaseMessage" in function "serialize_lc_message_to_ep"   "eval_protocol.pytest.default_langchain_rollout_processor.BaseMessage" is not assignable to "langchain_core.messages.base.BaseMessage" (reportArgumentType)

Type "type[langchain_core.messages.human.HumanMessage]" is not assignable to declared type "type[eval_protocol.pytest.default_langchain_rollout_processor.LangGraphRolloutProcessor.HumanMessage]"   "langchain_core.messages.human.HumanMessage" is not assignable to "eval_protocol.pytest.default_langchain_rollout_processor.LangGraphRolloutProcessor.HumanMessage"   Type "type[langchain_core.messages.human.HumanMessage]" is not assignable to type "type[eval_protocol.pytest.default_langchain_rollout_processor.LangGraphRolloutProcessor.HumanMessage]" (reportAssignmentType)

Type "type[langchain_core.messages.base.BaseMessage]" is not assignable to declared type "type[eval_protocol.pytest.default_langchain_rollout_processor.BaseMessage]"   "langchain_core.messages.base.BaseMessage" is not assignable to "eval_protocol.pytest.default_langchain_rollout_processor.BaseMessage"   Type "type[langchain_core.messages.base.BaseMessage]" is not assignable to type "type[eval_protocol.pytest.default_langchain_rollout_processor.BaseMessage]" (reportAssignmentType)

Except clause is unreachable because exception is already handled   "Exception" is a subclass of "Exception" (reportUnusedExcept)

Operation on "__all__" is not supported, so exported symbol list may be incorrect (reportUnsupportedDunderAll)