langgraph 0.1.17

Summary of Changes

• Improved state management by allowing empty state updates in Pregel.update_state(), preserving configuration between updates
• Enhanced checkpoint handling to support maintaining state when no values are provided

Detailed Changes

langgraph.pregel.Pregel

• Modified the update_state() method to accept None as a valid value for the values parameter, enabling state updates that preserve configuration without changing values
• Improved step counting logic to ensure proper incrementation when updating state
• Enhanced configuration preservation between updates by properly merging configurable fields from previous checkpoints

Checkpoint Creation (Internal)

• Updated internal checkpoint creation logic to handle cases where channels are not provided, allowing for checkpoint preservation while updating configuration