[Release] langchain-ai/langchain langchain==1.3.0: langchain==1.3.0

LangChain version 1.3.0 introduces support for `version="v3"` in the `stream_events` and `astream_events` methods, enabling enhanced event streaming capabilities for LangChain agents. This update allows developers to access improved event streaming functionality with better control and visibility into agent execution. The release includes comprehensive documentation in the event streaming guide for implementation details.

Key Points

• •New `version="v3"` parameter added to `stream_events()` method for synchronous event streaming
• •New `version="v3"` parameter added to `astream_events()` method for asynchronous event streaming
• •Enhanced event streaming provides better visibility into LangChain agent execution
• •Backward compatibility maintained with existing stream_events implementations
• •Event streaming guide documentation available for integration guidance
• •Applicable to LangChain agents for real-time event monitoring and debugging

Workflow Diagram

Concepts