CosmosDBSaverSync

Environment Variables:

COSMOSDB_ENDPOINT: CosmosDB endpoint URL (required). COSMOSDB_KEY: CosmosDB access key (optional, uses DefaultAzureCredential if not provided).

Example:

import os os.environ["COSMOSDB_ENDPOINT"] = ( ... "https://your-account.documents.azure.com:443/" ... ) os.environ["COSMOSDB_KEY"] = "your_key" # Optional

checkpointer = CosmosDBSaverSync( ... database_name="langgraph_db", ... container_name="checkpoints", ... )