0.3.18

langgraph 0.3.18

Summary of Changes

• Improved memory usage in task execution by using weak references for task objects (#3924)
• Enhanced tracing context handling with proper cleanup to avoid memory leaks and improve LangSmith integration (#3922)

Detailed Changes

langgraph.types.PregelExecutableTask

• Changed from NamedTuple to dataclass to support weak references (#3924)
• Added memory optimization with weakref_slot=True for Python 3.11+ to reduce memory footprint during execution

langgraph.pregel.runner.PregelRunner

• Modified task handling to use weak references instead of direct references to reduce memory usage and potential memory leaks (#3924)
• Updated internal _call and _acall methods to properly handle weak references to tasks

langgraph.pregel.loop.PregelLoop

• Updated task update logic to use dataclasses.replace() instead of _replace() to be compatible with the new task implementation (#3924)

langgraph.utils.runnable.set_config_context

• Implemented as a proper context manager that correctly sets up and cleans up tracing context (#3922)
• Ensures proper handling of LangChain tracers and LangSmith integration for better monitoring and debugging

langgraph.utils.runnable.RunnableCallable

• Updated to use the new set_config_context context manager for better context handling (#3922)
• Improved tracing and context cleanup to prevent potential memory leaks