checkpointpostgres==1.0.1

langgraph-checkpoint-postgres 1.0.1

Summary of Changes

• Added database migrations support for PostgresSaver implementation (PR #1255)
• Enhanced metadata serialization through proper JSON+Plus serialization (PR #1255)
• Improved error handling for database operations (PR #1255)
• Optimized database pipeline synchronization to only run when needed (PR #1255)

Detailed Changes

langgraph.checkpoint.postgres.PostgresSaver

• Replaced static table creation with versioned database migrations (PR #1255)
• Removed the is_setup flag in favor of a more robust setup method (PR #1255)
• Added proper metadata serialization using _load_metadata and _dump_metadata methods (PR #1255)
• Optimized pipeline sync to only happen when necessary (PR #1255)

langgraph.checkpoint.postgres.aio.AsyncPostgresSaver

• Implemented versioned database migrations for asynchronous variant (PR #1255)
• Removed the is_setup flag in favor of a more robust setup method (PR #1255)
• Added proper metadata serialization using _load_metadata and _dump_metadata methods (PR #1255)
• Added handling for UndefinedTable exceptions (PR #1255)
• Optimized pipeline sync to only happen when necessary (PR #1255)

langgraph.checkpoint.postgres.base.BasePostgresSaver

• Introduced a versioned migration system with MIGRATIONS list (PR #1255)
• Added JsonPlusSerializer for proper metadata serialization (PR #1255)
• Implemented _load_metadata and _dump_metadata methods to ensure consistent metadata handling (PR #1255)
• Added type checks for metadata serialization (PR #1255)