fix(nemo-relay): align adaptive config with tool_parallelism mode

Signed-off-by: mnajafian-nv <mnajafian@nvidia.com>

tests/plugins/test_nemo_relay_plugin.py

@@ -457,8 +457,8 @@ version = 1
 kind = "adaptive"
 enabled = true
 
-[components.config]
-mode = "route"
+[components.config.tool_parallelism]
+mode = "observe_only"
 """,
         encoding="utf-8",
     )
@@ -506,7 +506,7 @@ mode = "route"
     assert response.choices == [raw_choice]
     assert seen_request["intercepted"] is True
     execute_start = next(event for event in fake.events if event[0] == "llm.execute.start")
-    assert execute_start[3]["data"]["mode"] == "route"
+    assert execute_start[3]["data"]["mode"] == "observe_only"
     execute_end = next(event for event in fake.events if event[0] == "llm.execute.end")
     assert execute_end[2] == {
         "model": "demo-model",
@@ -527,6 +527,84 @@ mode = "route"
     }
 
 
+def _adaptive_llm_execute_mode(tmp_path, monkeypatch, plugins_toml_text: str) -> str:
+    fake = _FakeNemoRelay()
+    plugin = _fresh_plugin(monkeypatch, fake)
+    plugins_toml = tmp_path / "plugins.toml"
+    plugins_toml.write_text(plugins_toml_text, encoding="utf-8")
+    monkeypatch.setenv("HERMES_NEMO_RELAY_PLUGINS_TOML", str(plugins_toml))
+
+    plugin.on_llm_execution_middleware(
+        session_id="s1",
+        provider="anthropic",
+        model="demo-model",
+        request={"messages": [{"role": "user", "content": "hi"}]},
+        next_call=lambda request: {"raw": request},
+    )
+
+    execute_start = next(event for event in fake.events if event[0] == "llm.execute.start")
+    return execute_start[3]["data"]["mode"]
+
+
+def test_nemo_relay_adaptive_llm_execution_middleware_defaults_to_observe_only_when_mode_is_unset(
+    tmp_path, monkeypatch
+):
+    mode = _adaptive_llm_execute_mode(
+        tmp_path,
+        monkeypatch,
+        """
+version = 1
+
+[[components]]
+kind = "adaptive"
+enabled = true
+
+[components.config]
+version = 1
+""",
+    )
+    assert mode == "observe_only"
+
+
+def test_nemo_relay_adaptive_llm_execution_middleware_accepts_legacy_top_level_mode(tmp_path, monkeypatch):
+    mode = _adaptive_llm_execute_mode(
+        tmp_path,
+        monkeypatch,
+        """
+version = 1
+
+[[components]]
+kind = "adaptive"
+enabled = true
+
+[components.config]
+mode = "route"
+""",
+    )
+    assert mode == "route"
+
+
+def test_nemo_relay_adaptive_llm_execution_middleware_prefers_tool_parallelism_mode(tmp_path, monkeypatch):
+    mode = _adaptive_llm_execute_mode(
+        tmp_path,
+        monkeypatch,
+        """
+version = 1
+
+[[components]]
+kind = "adaptive"
+enabled = true
+
+[components.config]
+mode = "route"
+
+[components.config.tool_parallelism]
+mode = "schedule"
+""",
+    )
+    assert mode == "schedule"
+
+
 def test_nemo_relay_llm_execution_middleware_calls_through_without_adaptive(monkeypatch):
     fake = _FakeNemoRelay()
     plugin = _fresh_plugin(monkeypatch, fake)
@@ -555,8 +633,8 @@ version = 1
 kind = "adaptive"
 enabled = true
 
-[components.config]
-mode = "route"
+[components.config.tool_parallelism]
+mode = "observe_only"
 """,
         encoding="utf-8",
     )
@@ -582,7 +660,7 @@ mode = "route"
     assert response == {"raw": True, "args": {"command": "pwd", "intercepted": True}}
     assert seen_args["intercepted"] is True
     execute_start = next(event for event in fake.events if event[0] == "tool.execute.start")
-    assert execute_start[3]["data"]["mode"] == "route"
+    assert execute_start[3]["data"]["mode"] == "observe_only"
     assert execute_start[3]["data"]["tool_call_id"] == "tool-1"
 
 
@@ -613,8 +691,8 @@ version = 1
 kind = "adaptive"
 enabled = true
 
-[components.config]
-mode = "route"
+[components.config.tool_parallelism]
+mode = "observe_only"
 """,
         encoding="utf-8",
     )