fix(memory): add write origin metadata

tests/run_agent/test_flush_memories_codex.py

@@ -233,6 +233,31 @@ class TestFlushMemoriesUsesAuxiliaryClient:
         assert call_kwargs.kwargs["target"] == "notes"
         assert "dark mode" in call_kwargs.kwargs["content"]
 
+    def test_flush_bridges_memory_write_metadata(self, monkeypatch):
+        """Flush memory writes notify external providers with flush provenance."""
+        agent = _make_agent(monkeypatch, api_mode="chat_completions", provider="openrouter")
+        agent._memory_manager = MagicMock()
+        agent.session_id = "sess-flush"
+        agent.platform = "cli"
+
+        mock_response = _chat_response_with_memory_call()
+
+        with patch("agent.auxiliary_client.call_llm", return_value=mock_response):
+            messages = [
+                {"role": "user", "content": "Hello"},
+                {"role": "assistant", "content": "Hi"},
+                {"role": "user", "content": "Note this"},
+            ]
+            with patch("tools.memory_tool.memory_tool", return_value="Saved."):
+                agent.flush_memories(messages)
+
+        agent._memory_manager.on_memory_write.assert_called_once()
+        call_kwargs = agent._memory_manager.on_memory_write.call_args
+        assert call_kwargs.args[:3] == ("add", "notes", "User prefers dark mode.")
+        assert call_kwargs.kwargs["metadata"]["write_origin"] == "memory_flush"
+        assert call_kwargs.kwargs["metadata"]["execution_context"] == "flush_memories"
+        assert call_kwargs.kwargs["metadata"]["session_id"] == "sess-flush"
+
     def test_flush_strips_artifacts_from_messages(self, monkeypatch):
         """After flush, the flush prompt and any response should be removed from messages."""
         agent = _make_agent(monkeypatch, api_mode="chat_completions", provider="openrouter")