Exclude complex values from checkpoint metadata

libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/__init__.py

@@ -402,9 +402,13 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                 **{
                     k: v
                     for k, v in config["configurable"].items()
-                    if not k.startswith("__")
+                    if not k.startswith("__") and isinstance(v, (str, int, bool, float))
+                },
+                **{
+                    k: v
+                    for k, v in config.get("metadata", {}).items()
+                    if not k.startswith("__") and isinstance(v, (str, int, bool, float))
                 },
-                **config.get("metadata", {}),
                 **metadata,
             }
         )

libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/aio.py

@@ -468,9 +468,13 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                 **{
                     k: v
                     for k, v in config["configurable"].items()
-                    if not k.startswith("__")
+                    if not k.startswith("__") and isinstance(v, (str, int, bool, float))
+                },
+                **{
+                    k: v
+                    for k, v in config.get("metadata", {}).items()
+                    if not k.startswith("__") and isinstance(v, (str, int, bool, float))
                 },
-                **config.get("metadata", {}),
                 **metadata,
             }
         )

libs/checkpoint-sqlite/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "langgraph-checkpoint-sqlite"
-version = "2.0.4"
+version = "2.0.5"
 description = "Library with a SQLite implementation of LangGraph checkpoint saver."
 authors = []
 license = "MIT"