From 9f5f3fb35eac99491391ed1fc337c0f7fe254352 Mon Sep 17 00:00:00 2001
From: William FH <13333726+hinthornw@users.noreply.github.com>
Date: Thu, 2 Apr 2026 11:05:17 -0700
Subject: [PATCH] Revert "chore: update configurable metadata" (#7393)

Reverts langchain-ai/langgraph#7367
---
 libs/langgraph/langgraph/_internal/_config.py | 20 ++++++++++++++++++-
 libs/langgraph/tests/test_utils.py            |  2 +-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/libs/langgraph/langgraph/_internal/_config.py b/libs/langgraph/langgraph/_internal/_config.py
index fe1aad509..4e9c5aa92 100644
--- a/libs/langgraph/langgraph/_internal/_config.py
+++ b/libs/langgraph/langgraph/_internal/_config.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from collections import ChainMap
-from collections.abc import Sequence
+from collections.abc import Mapping, Sequence
 from os import getenv
 from typing import Any, cast
 
@@ -308,4 +308,22 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
         for k, v in config.items():
             if _is_not_empty(v) and k not in CONFIG_KEYS:
                 empty[CONF][k] = v
+    _empty_metadata = empty["metadata"]
+    for key, value in empty[CONF].items():
+        if _exclude_as_metadata(key, value, _empty_metadata):
+            continue
+        _empty_metadata[key] = value
     return empty
+
+
+_OMIT = ("key", "token", "secret", "password", "auth")
+
+
+def _exclude_as_metadata(key: str, value: Any, metadata: Mapping[str, Any]) -> bool:
+    key_lower = key.casefold()
+    return (
+        key.startswith("__")
+        or not isinstance(value, (str, int, float, bool))
+        or key in metadata
+        or any(substr in key_lower for substr in _OMIT)
+    )
diff --git a/libs/langgraph/tests/test_utils.py b/libs/langgraph/tests/test_utils.py
index e841d7b0a..c8d2bbc71 100644
--- a/libs/langgraph/tests/test_utils.py
+++ b/libs/langgraph/tests/test_utils.py
@@ -312,7 +312,7 @@ def test_configurable_metadata():
         },
         "metadata": {"nooverride": 18},
     }
-    expected = {"nooverride"}
+    expected = {"includeme", "andme", "nooverride"}
     merged = ensure_config(config)
     metadata = merged["metadata"]
     assert metadata.keys() == expected