[Release] langchain-ai/langchain langchain==1.2.18: langchain==1.2.18

LangChain version 1.2.18 was released with several key changes including a revert of the ls_agent_type tag feature on create_agent calls, deprecation of hub functionality with load/dump limitations, refactoring of deprecation targets toward create_agent, uncommenting of optional dependencies, and a concurrent Fireworks integration update to 1.2.1.

Key Points

• •Reverted ls_agent_type tag implementation on create_agent calls due to potential issues or design reconsideration
• •Deprecated hub functionality in langchain-classic with restrictions on loads/dumps operations
• •Refactored deprecation warnings to target create_agent function as the primary migration path
• •Re-enabled optional dependencies that were previously commented out for better flexibility
• •Released Fireworks integration version 1.2.1 alongside main LangChain update
• •Maintenance release focused on API cleanup and deprecation management rather than new features
• •Changes span both core langchain and langchain-classic packages

Workflow Diagram

Concepts