checkpoint==2.0.4

langgraph-checkpoint 2.0.4

Summary of Changes

• Added support for interrupt and resume operations in the checkpoint system
• Removed unused CommandProtocol class and related serialization code

Detailed Changes

langgraph.checkpoint.serde.types

• Added new constants INTERRUPT = "__interrupt__" and RESUME = "__resume__" to support interruption and resumption operations in graph execution
• Removed CommandProtocol class which was no longer needed

langgraph.checkpoint.base

• Updated WRITES_IDX_MAP to include new interrupt and resume operation types with reserved index values (-3 and -4)

langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer

• Removed serialization handling for the now-deleted CommandProtocol class
• Simplified JSON and MessagePack serialization code