diff --git a/run_agent.py b/run_agent.py
index 984c8e71d..1372def27 100644
--- a/run_agent.py
+++ b/run_agent.py
@@ -3304,10 +3304,15 @@ class AIAgent:
                 logger.warning("Background memory/skill review failed: %s", e)
                 self._emit_auxiliary_failure("background review", e)
             finally:
-                # Close all resources (httpx client, subprocesses, etc.) so
-                # GC doesn't try to clean them up on a dead asyncio event
-                # loop (which produces "Event loop is closed" errors).
+                # Background review agents can initialize memory providers
+                # (for example Hindsight) that own their own network clients.
+                # Explicitly stop those providers before closing the agent so
+                # their aiohttp sessions do not leak until GC/process exit.
                 if review_agent is not None:
+                    try:
+                        review_agent.shutdown_memory_provider()
+                    except Exception:
+                        pass
                     try:
                         review_agent.close()
                     except Exception:
diff --git a/tests/run_agent/test_background_review.py b/tests/run_agent/test_background_review.py
new file mode 100644
index 000000000..79ececb48
--- /dev/null
+++ b/tests/run_agent/test_background_review.py
@@ -0,0 +1,66 @@
+"""Regression tests for background review agent cleanup."""
+
+from __future__ import annotations
+
+import run_agent as run_agent_module
+from run_agent import AIAgent
+
+
+def _bare_agent() -> AIAgent:
+    agent = object.__new__(AIAgent)
+    agent.model = "fake-model"
+    agent.platform = "telegram"
+    agent.provider = "openai"
+    agent._memory_store = object()
+    agent._memory_enabled = True
+    agent._user_profile_enabled = False
+    agent._MEMORY_REVIEW_PROMPT = "review memory"
+    agent._SKILL_REVIEW_PROMPT = "review skills"
+    agent._COMBINED_REVIEW_PROMPT = "review both"
+    agent.background_review_callback = None
+    agent._safe_print = lambda *_args, **_kwargs: None
+    return agent
+
+
+class ImmediateThread:
+    def __init__(self, *, target, daemon=None, name=None):
+        self._target = target
+
+    def start(self):
+        self._target()
+
+
+def test_background_review_shuts_down_memory_provider_before_close(monkeypatch):
+    events = []
+
+    class FakeReviewAgent:
+        def __init__(self, **kwargs):
+            events.append(("init", kwargs))
+            self._session_messages = []
+
+        def run_conversation(self, **kwargs):
+            events.append(("run_conversation", kwargs))
+
+        def shutdown_memory_provider(self):
+            events.append(("shutdown_memory_provider", None))
+
+        def close(self):
+            events.append(("close", None))
+
+    monkeypatch.setattr(run_agent_module, "AIAgent", FakeReviewAgent)
+    monkeypatch.setattr(run_agent_module.threading, "Thread", ImmediateThread)
+
+    agent = _bare_agent()
+
+    AIAgent._spawn_background_review(
+        agent,
+        messages_snapshot=[{"role": "user", "content": "hello"}],
+        review_memory=True,
+    )
+
+    assert [name for name, _payload in events] == [
+        "init",
+        "run_conversation",
+        "shutdown_memory_provider",
+        "close",
+    ]