[feat] add to_runnable decorator & lcc tool message add name and tool_call_id

CHANGLOG.md

@@ -1,3 +1,9 @@
+## [0.1.25] - 2026-01-22
+### Added
+- add to_runnable decorator
+- lcc tool message add name and tool_call_id
+- support set finish time of span
+
 ## [0.1.24] - 2026-01-16
 ### Added
 - client init set default client if not exist

cozeloop/decorator/__init__.py

@@ -5,3 +5,4 @@
 
 coze_loop_decorator= CozeLoopDecorator()
 observe = coze_loop_decorator.observe
+to_runnable = coze_loop_decorator.to_runnable

cozeloop/decorator/decorator.py

@@ -4,6 +4,8 @@
 from typing import Optional, Callable, Any, overload, Dict, Generic, Iterator, TypeVar, List, cast, AsyncIterator
 from functools import wraps
 
+from langchain_core.runnables import RunnableLambda, RunnableConfig
+
 from cozeloop import Client, Span, start_span
 from cozeloop.decorator.utils import is_async_func, is_gen_func, is_async_gen_func, is_class_func
 
@@ -311,6 +313,182 @@ async def async_stream_wrapper(*args: Any, **kwargs: Any):
         else:
             return decorator(func)
 
+    def to_runnable(
+            self,
+            func: Callable = None,
+    ) -> Callable:
+        """
+        Decorator to be RunnableLambda.
+
+        :param func: The function to be decorated, Requirements are as follows：
+                     1. When the func is called, parameter config(RunnableConfig) is required, you must use the config containing cozeloop callback handler of 'current request', otherwise, the trace may be lost!
+
+        Examples:
+            @to_runnable
+            def runnable_func(my_input: dict) -> str:
+                return input
+
+            async def scorer_leader(state: MyState) -> dict | str:
+                await runnable_func({"a": "111", "b": 222, "c": "333"}, config=state.config) # config is required
+        """
+
+        def decorator(func: Callable):
+
+            @wraps(func)
+            def sync_wrapper(*args: Any, **kwargs: Any):
+                config = kwargs.pop("config", None)
+                config = _convert_config(config)
+                res = None
+                try:
+                    extra = {}
+                    if len(args) > 0 and is_class_func(func):
+                        extra = {"_inner_class_self": args[0]}
+                        args = args[1:]
+                    inp = {}
+                    if len(args) > 0:
+                        inp['args'] = args
+                    if len(kwargs) > 0:
+                        inp['kwargs'] = kwargs
+                    res = RunnableLambda(_param_wrapped_func).invoke(input=inp, config=config, **extra)
+                    if hasattr(res, "__iter__"):
+                        return res
+                except StopIteration:
+                    pass
+                except Exception as e:
+                    raise e
+                finally:
+                    if res is not None:
+                        return res
+
+            @wraps(func)
+            async def async_wrapper(*args: Any, **kwargs: Any):
+                config = kwargs.pop("config", None)
+                config = _convert_config(config)
+                res = None
+                try:
+                    extra = {}
+                    if len(args) > 0 and is_class_func(func):
+                        extra = {"_inner_class_self": args[0]}
+                        args = args[1:]
+                    inp = {}
+                    if len(args) > 0:
+                        inp['args'] = args
+                    if len(kwargs) > 0:
+                        inp['kwargs'] = kwargs
+                    res = await RunnableLambda(_param_wrapped_func_async).ainvoke(input=inp, config=config, **extra)
+                    if hasattr(res, "__aiter__"):
+                        return res
+                except StopIteration:
+                    pass
+                except StopAsyncIteration:
+                    pass
+                except Exception as e:
+                    if e.args and e.args[0] == 'coroutine raised StopIteration':  # coroutine StopIteration
+                        pass
+                    else:
+                        raise e
+                finally:
+                    if res is not None:
+                        return res
+
+            @wraps(func)
+            def gen_wrapper(*args: Any, **kwargs: Any):
+                config = kwargs.pop("config", None)
+                config = _convert_config(config)
+                try:
+                    extra = {}
+                    if len(args) > 0 and is_class_func(func):
+                        extra = {"_inner_class_self": args[0]}
+                        args = args[1:]
+                    inp = {}
+                    if len(args) > 0:
+                        inp['args'] = args
+                    if len(kwargs) > 0:
+                        inp['kwargs'] = kwargs
+                    gen = RunnableLambda(_param_wrapped_func).invoke(input=inp, config=config, *extra)
+                    try:
+                        for item in gen:
+                            yield item
+                    except StopIteration:
+                        pass
+                except Exception as e:
+                    raise e
+
+            @wraps(func)
+            async def async_gen_wrapper(*args: Any, **kwargs: Any):
+                config = kwargs.pop("config", None)
+                config = _convert_config(config)
+                try:
+                    extra = {}
+                    if len(args) > 0 and is_class_func(func):
+                        extra = {"_inner_class_self": args[0]}
+                        args = args[1:]
+                    inp = {}
+                    if len(args) > 0:
+                        inp['args'] = args
+                    if len(kwargs) > 0:
+                        inp['kwargs'] = kwargs
+                    gen = RunnableLambda(_param_wrapped_func_async).invoke(input=inp, config=config, **extra)
+                    items = []
+                    try:
+                        async for item in gen:
+                            items.append(item)
+                            yield item
+                    finally:
+                        pass
+                except StopIteration:
+                    pass
+                except StopAsyncIteration:
+                    pass
+                except Exception as e:
+                    if e.args and e.args[0] == 'coroutine raised StopIteration':
+                        pass
+                    else:
+                        raise e
+
+            # for convert parameter
+            def _param_wrapped_func(input_dict: dict, **kwargs) -> Any:
+                real_args = input_dict.get("args", ())
+                real_kwargs = input_dict.get("kwargs", {})
+
+                inner_class_self = kwargs.get("_inner_class_self", None)
+                if inner_class_self is not None:
+                    real_args = (inner_class_self, *real_args)
+
+                return func(*real_args, **real_kwargs)
+
+            async def _param_wrapped_func_async(input_dict: dict, **kwargs) -> Any:
+                real_args = input_dict.get("args", ())
+                real_kwargs = input_dict.get("kwargs", {})
+
+                inner_class_self = kwargs.get("_inner_class_self", None)
+                if inner_class_self is not None:
+                    real_args = (inner_class_self, *real_args)
+
+                return await func(*real_args, **real_kwargs)
+
+            def _convert_config(config: RunnableConfig = None) -> RunnableConfig | None:
+                if config is None:
+                    config = RunnableConfig(run_name=func.__name__)
+                    config['run_name'] = func.__name__
+                elif isinstance(config, dict):
+                    config['run_name'] = func.__name__
+                return config
+
+            if is_async_gen_func(func):
+                return async_gen_wrapper
+            if is_gen_func(func):
+                return gen_wrapper
+            elif is_async_func(func):
+                return async_wrapper
+            else:
+                return sync_wrapper
+
+        if func is None:
+            return decorator
+        else:
+            return decorator(func)
+
 
 class _CozeLoopTraceStream(Generic[S]):
     def __init__(

cozeloop/integration/langchain/trace_callback.py

@@ -14,7 +14,7 @@
 from langchain_core.outputs import LLMResult, ChatGeneration
 from langchain_core.agents import AgentFinish, AgentAction
 from langchain_core.prompt_values import PromptValue, ChatPromptValue
-from langchain_core.messages import BaseMessage, AIMessageChunk, AIMessage
+from langchain_core.messages import BaseMessage, AIMessageChunk, AIMessage, ToolMessage
 from langchain_core.prompts import AIMessagePromptTemplate, HumanMessagePromptTemplate, SystemMessagePromptTemplate
 from langchain_core.outputs import ChatGenerationChunk, GenerationChunk
 
@@ -581,6 +581,15 @@ def _convert_inputs(inputs: Any) -> Any:
         if inputs.content != '':
             format_inputs['content'] = inputs.content
         return format_inputs
+    if isinstance(inputs, ToolMessage):
+        """
+        Must be before BaseMessage.
+        """
+        content = {"content": inputs.content}
+        if inputs.artifact is not None:
+            content['artifact'] = _convert_inputs(inputs.artifact) # artifact is existed when response_format="content_and_artifact".
+        message = Message(role=inputs.type, content=content)
+        return message
     if isinstance(inputs, BaseMessage):
         message = Message(role=inputs.type, content=inputs.content,
                           tool_calls=inputs.additional_kwargs.get('tool_calls', []))

cozeloop/integration/langchain/trace_model/llm_model.py

@@ -53,6 +53,8 @@ class Message:
     tool_calls: List[ToolCall] = None
     metadata: Optional[dict] = None
     reasoning_content: Optional[str] = None
+    name: Optional[str] = None
+    tool_call_id: Optional[str] = None
 
     def __post_init__(self):
         if self.role is not None and (self.role == 'AIMessageChunk' or self.role == 'ai'):
@@ -155,7 +157,7 @@ def __init__(self, messages: List[Union[BaseMessage, List[BaseMessage]]], invoca
                 if message.additional_kwargs is not None and message.additional_kwargs.get('name', ''):
                     name = message.additional_kwargs.get('name', '')
                 tool_call = ToolCall(id=message.tool_call_id, type=message.type, function=ToolFunction(name=name))
-                self._messages.append(Message(role=message.type, content=message.content, tool_calls=[tool_call]))
+                self._messages.append(Message(role=message.type, content=message.content, tool_calls=[tool_call], name=name, tool_call_id=message.tool_call_id))
             else:
                 self._messages.append(Message(role=message.type, content=message.content))
 

cozeloop/internal/trace/noop_span.py

@@ -125,6 +125,9 @@ def set_system_tags(self, system_tags: Dict[str, Any]) -> None:
     def set_deployment_env(self, deployment_env: str) -> None:
         pass
 
+    def set_finish_time(self, finish_time: datetime) -> None:
+        pass
+
     def __enter__(self):
         return self
 

cozeloop/internal/trace/span.py

@@ -78,6 +78,7 @@ def __init__(self, span_type: str = '', name: str = '', space_id: str = '', trac
         self.space_id = space_id
         self.parent_span_id = parent_span_id
         self.start_time = start_time if start_time else datetime.now()
+        self.finish_time: datetime = None
         self.duration = duration
         self.tag_map = tag_map if tag_map else {}
         self.system_tag_map = system_tag_map if system_tag_map else {}
@@ -396,6 +397,10 @@ def set_system_tags(self, system_tags: Dict[str, Any]) -> None:
     def set_deployment_env(self, deployment_env: str) -> None:
         self.set_tags({DEPLOYMENT_ENV: deployment_env})
 
+    def set_finish_time(self, finish_time: datetime) -> None:
+        self.finish_time = finish_time
+
+
     def get_rectified_map(self, input_map: Dict[str, Any]) -> (Dict[str, Any], List[str], int):
         validate_map = {}
         cut_off_keys = []
@@ -541,7 +546,10 @@ def set_stat_info(self):
         if input_tokens > 0 or output_tokens > 0:
             self.set_tags({TOKENS: int(input_tokens) + int(output_tokens)})
 
-        duration = int((datetime.now().timestamp() - self.start_time.timestamp()) * 1000000)
+        finish_time_stamp = datetime.now().timestamp()
+        if self.finish_time is not None:
+            finish_time_stamp = self.finish_time.timestamp()
+        duration = int((finish_time_stamp - self.start_time.timestamp()) * 1000000)
         with self.lock:
             self.duration = duration
 

cozeloop/span.py

@@ -186,11 +186,18 @@ def set_system_tags(self, system_tags: Dict[str, Any]) -> None:
         Set system tags. DO NOT use this method unless you know what you are doing.
         """
 
+    @abstractmethod
     def set_deployment_env(self, deployment_env: str) -> None:
         """
         Set the deployment environment of the span, identify custom environments.
         """
 
+    @abstractmethod
+    def set_finish_time(self, finish_time: datetime) -> None:
+        """
+        Set the finish time of the span.
+        """
+
 
 class Span(CommonSpanSetter, SpanContext):
     """

examples/trace/simple.py

@@ -4,6 +4,7 @@
 import logging
 import os
 import time
+from datetime import datetime, timedelta
 
 import cozeloop
 
@@ -100,6 +101,7 @@ def do_simple_demo():
         span.set_error(str(e))
 
     # 3. span finish
+    span.set_finish_time(datetime.now() + timedelta(seconds=3)) # set finish time as your need to change duration
     span.finish()
 
     # 4. (optional) flush or close

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cozeloop"
-version = "0.1.24"
+version = "0.1.25"
 description = "coze loop sdk"
 authors = ["JiangQi715 <jiangqi.rrt@bytedance.com>"]
 license = "MIT"