checkpoint==2.0.9

langgraph-checkpoint 2.0.9

Summary of Changes

• Added safety checks to prevent deadlocks when mixing async and sync store operations (#2673)
• Improved documentation for storage APIs, especially around vector search and embeddings (#2616, #2623, #2628, #2630)
• Enhanced Item class with better string representation for debugging (#2655)
• Fixed msgpack unpacking in serialization to handle non-string dict keys (#2744)
• Improved performance of async methods in InMemorySaver by removing unnecessary thread pool usage

Detailed Changes

langgraph.store.base.batch.AsyncBatchedBaseStore

• Added _check_loop decorator to detect and prevent deadlocks when synchronous methods are called from the event loop (#2673)
• Implemented proper synchronous methods that safely call their async counterparts using asyncio.run_coroutine_threadsafe (#2673)
• Fixed proper initialization with super().__init__() to ensure parent class initialization (#2673)

langgraph.store.base.Item

• Added helpful __repr__ method for better debugging and display of items (#2655)
• Standardized the output order of fields in the dict() method to be more consistent (#2655)

langgraph.store.base.IndexConfig

• Improved documentation for embedding dimensions, showing the correct model names (e.g., openai:text-embedding-3-small) (#2624)
• Enhanced documentation for the fields parameter to better explain JSON path syntax and usage patterns (#2628)
• Added extensive examples for embedding configuration, including OpenAI SDK direct usage (#2616)
• Added clarification about when indexing is ignored if vector search is not enabled (#2630)

langgraph.store.memory.InMemoryStore

• Enhanced documentation with clear examples of basic and vector search usage (#2616)
• Added note clarifying that semantic search requires explicit configuration (#2630)
• Updated example to use modern LangChain embedding initialization with init_embeddings() (#2616)

langgraph.checkpoint.memory.InMemorySaver

• Improved performance by removing unnecessary thread pool execution for in-memory operations

langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer

• Fixed message unpacking by adding strict_map_key=False to handle non-string dictionary keys in msgpack deserialization