checkpoint==1.0.7

langgraph-checkpoint 1.0.7

Summary of Changes

• Added support for parent checkpoint references in checkpoint metadata, replacing the previous score field
• Added handling of pending task sends across checkpoint loading and listing
• Improved serialization handling for various object types
• Enhanced checkpoint listing with better namespace handling
• Removed unnecessary ABC inheritance for BaseCheckpointSaver

Detailed Changes

langgraph.checkpoint.base.CheckpointMetadata

• Replaced score field with parents field, which maps checkpoint namespace to checkpoint ID
• This allows for more sophisticated relationship tracking between checkpoints

langgraph.checkpoint.base.BaseCheckpointSaver

• Removed inheritance from ABC (Abstract Base Class)
• Simplified the class definition while maintaining the same interface

langgraph.checkpoint.memory.InMemorySaver

• Added support for tracking and including pending sends in checkpoints
• Enhanced get_tuple method to include "pending_sends" from parent checkpoints
• Improved the list method to better handle checkpoint namespace filtering
• Fixed logic for querying checkpoints by ID and metadata

langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer

• Improved serialization of objects with model_dump and dict methods by specifying constructor methods
• Enhanced exception handling during deserialization
• Changed BaseException serialization to use string representation instead of constructor arguments
• Added better class checks during deserialization