checkpoint==2.0.5

langgraph-checkpoint 2.0.5

Summary of Changes

• Added PersistentDict class to enable disk-persistent checkpoints #2439
• Enhanced MemorySaver with a configurable storage factory, allowing use of the new persistent storage #2439

Detailed Changes

langgraph.checkpoint.memory.MemorySaver

• Added ability to customize storage backend via a new factory parameter, which defaults to defaultdict #2439
• Modified context manager methods to properly handle custom storage backends using ExitStack #2439

langgraph.checkpoint.memory.PersistentDict

• New class providing dictionary-like storage with persistence to disk #2439
• Implements Python context manager interface for automatic saving on exit
• Uses atomic writes for data safety (writing to a temporary file first)
• Currently supports pickle serialization format
• Designed to be used with MemorySaver as a drop-in replacement for in-memory storage