Add tts/text output schema

engine/tests/test_tool_call_flow.py

@@ -125,6 +125,36 @@ async def test_turn_without_tool_keeps_streaming(monkeypatch):
     assert "assistant.tool_call" not in event_types
 
 
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "metadata",
+    [
+        {"output": {"mode": "text"}},
+        {"services": {"tts": {"enabled": False}}},
+    ],
+)
+async def test_text_output_mode_skips_audio_events(monkeypatch, metadata):
+    pipeline, events = _build_pipeline(
+        monkeypatch,
+        [
+            [
+                LLMStreamEvent(type="text_delta", text="hello "),
+                LLMStreamEvent(type="text_delta", text="world."),
+                LLMStreamEvent(type="done"),
+            ]
+        ],
+    )
+    pipeline.apply_runtime_overrides(metadata)
+
+    await pipeline._handle_turn("hi")
+
+    event_types = [e.get("type") for e in events]
+    assert "assistant.response.delta" in event_types
+    assert "assistant.response.final" in event_types
+    assert "output.audio.start" not in event_types
+    assert "output.audio.end" not in event_types
+
+
 @pytest.mark.asyncio
 async def test_turn_with_tool_call_then_results(monkeypatch):
     pipeline, events = _build_pipeline(