checkpoint==2.0.24

langgraph-checkpoint 2.0.24

Summary of Changes

• Added support for None values in JsonPlusSerializer via new "null" type handling (#4103)
• Added documentation comments for backward compatibility elements (#4105, #4126)

Detailed Changes

langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer

• Enhanced serialization and deserialization capabilities by adding explicit support for None values (#4103)
  • Added a new "null" type designation for handling None values
  • Modified dumps_typed to return "null", EMPTY_BYTES when the input is None
  • Modified loads_typed to return None when the type is "null"

langgraph.checkpoint.base.PendingWrite

• Added documentation comment indicating LATEST_VERSION constant is maintained for backward compatibility (#4126)

langgraph.checkpoint.base.empty_checkpoint

• Added documentation comment indicating this function is maintained for backward compatibility with older versions of LangGraph (#4126)

langgraph.checkpoint.base.create_checkpoint

• Added documentation comment indicating this function is maintained for backward compatibility with older versions of LangGraph (#4105)