fix(agent): scope Nous tags to Nous auxiliary calls

tests/agent/test_auxiliary_client.py

@@ -146,6 +146,47 @@ class TestBuildCallKwargsMaxTokens:
         assert "max_completion_tokens" not in kwargs
 
 
+class TestNousTagsScoping:
+    def test_tags_injected_when_provider_is_nous(self, monkeypatch):
+        import agent.auxiliary_client as aux
+
+        monkeypatch.setattr(aux, "auxiliary_is_nous", False)
+
+        kwargs = aux._build_call_kwargs(
+            provider="nous",
+            model="hermes-4",
+            messages=[{"role": "user", "content": "hi"}],
+        )
+
+        assert kwargs["extra_body"]["tags"] == aux._nous_portal_tags()
+
+    def test_tags_not_injected_for_gemini_when_main_is_nous(self, monkeypatch):
+        import agent.auxiliary_client as aux
+
+        monkeypatch.setattr(aux, "auxiliary_is_nous", True)
+
+        kwargs = aux._build_call_kwargs(
+            provider="gemini",
+            model="gemini-2.5-flash",
+            messages=[{"role": "user", "content": "hi"}],
+        )
+
+        assert "extra_body" not in kwargs
+
+    def test_tags_not_injected_for_openrouter_when_main_is_nous(self, monkeypatch):
+        import agent.auxiliary_client as aux
+
+        monkeypatch.setattr(aux, "auxiliary_is_nous", True)
+
+        kwargs = aux._build_call_kwargs(
+            provider="openrouter",
+            model="openai/gpt-5.4",
+            messages=[{"role": "user", "content": "hi"}],
+        )
+
+        assert "extra_body" not in kwargs
+
+
 class TestNormalizeAuxProvider:
     def test_maps_github_copilot_aliases(self):
         assert _normalize_aux_provider("github") == "copilot"