checkpoint==1.0.11

langgraph-checkpoint 1.0.11

Summary of Changes

• Enhanced type annotations throughout the codebase, improving type safety and developer experience
• Added generic type parameter to BaseCheckpointSaver for better type checking of version identifiers #1814
• Improved version handling in checkpoint savers to support different types of version identifiers
• Added missing methods to SerializerCompat class
• Refined and simplified interface for channel protocols

Detailed Changes

langgraph.checkpoint.base.BaseCheckpointSaver

• Now a generic class with type parameter V for better type safety of version identifiers
• Changed parameter types from List to more generic Sequence for better flexibility
• Enhanced the get_next_version method to handle different types of version identifiers, including strings and numbers

langgraph.checkpoint.base.Checkpoint

• Improved documentation clarifying that channel_values contains deserialized values
• Enhanced documentation for channel_versions to explain that version strings are monotonically increasing
• Updated description of pending_sends to better reflect its purpose

langgraph.checkpoint.memory.MemorySaver

• Now properly extends the generic BaseCheckpointSaver[str]
• Updated type annotations for storage collections to be more precise
• Fixed return type annotations for methods like put_writes and aput_writes

langgraph.checkpoint.serde.base.SerializerCompat

• Added missing dumps and loads methods to complement the existing typed methods, making the class fully implement the serializer protocol

langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer

• Improved type annotations throughout the class for better type checking
• Enhanced error handling and type safety for msgpack serialization

langgraph.checkpoint.serde.types.ChannelProtocol

• Changed type parameters to be covariant/contravariant for better type safety
• Simplified the from_checkpoint method interface, removing unnecessary parameters