diff --git a/packages/agent-framework-python/src/supermemory_agent_framework/tools.py b/packages/agent-framework-python/src/supermemory_agent_framework/tools.py
index 2b70bdd7..c97b0541 100644
--- a/packages/agent-framework-python/src/supermemory_agent_framework/tools.py
+++ b/packages/agent-framework-python/src/supermemory_agent_framework/tools.py
@@ -130,10 +130,12 @@ class SupermemoryTools:
     ) -> str:
         """Add (remember) memories/details/information about the user or other facts or entities. Run when explicitly asked or when the user mentions any information generalizable beyond the context of the current conversation."""
         try:
+            # No custom_id: each remembered fact is its own document. A shared id would
+            # make every call update one document, replacing the previous memory and
+            # colliding with the conversation transcript saved under connection.custom_id.
             response = await self._client.add(
                 content=memory,
                 container_tag=self._connection.container_tag,
-                custom_id=self._connection.custom_id,
             )
             result: MemoryAddResult = {
                 "success": True,
diff --git a/packages/agent-framework-python/tests/test_tools.py b/packages/agent-framework-python/tests/test_tools.py
index 00da0f7d..17fdb080 100644
--- a/packages/agent-framework-python/tests/test_tools.py
+++ b/packages/agent-framework-python/tests/test_tools.py
@@ -47,3 +47,31 @@ class TestSupermemoryTools:
         conn = _make_conn(conversation_id="conv-123")
         tools = SupermemoryTools(conn)
         assert tools._connection.custom_id == "conversation_conv-123"
+
+
+class _RecordingClient:
+    def __init__(self) -> None:
+        self.add_calls: list[dict] = []
+
+    async def add(self, **kwargs):
+        self.add_calls.append(kwargs)
+        return {"id": f"doc-{len(self.add_calls)}", "status": "queued"}
+
+
+class TestAddMemoryDocumentIdentity:
+    @pytest.mark.asyncio
+    async def test_add_memory_does_not_reuse_conversation_document_id(self) -> None:
+        conn = _make_conn(conversation_id="conv-123")
+        tools = SupermemoryTools(conn)
+        client = _RecordingClient()
+        tools._client = client
+
+        await tools.add_memory("The user likes green tea.")
+        await tools.add_memory("The user lives in Lisbon.")
+
+        assert len(client.add_calls) == 2
+        # A shared custom_id makes Supermemory treat every call as an update of one
+        # document, so the second memory replaces the first and both collide with the
+        # conversation transcript saved under the same id.
+        assert all(call.get("custom_id") != conn.custom_id for call in client.add_calls)
+        assert all(call["container_tag"] == "msft_agent_chat" for call in client.add_calls)