test: Add test to ensure responses API is used regardless of circuit breaker state

nanobot/providers/openai_compat_provider.py

@@ -740,7 +740,9 @@ class OpenAICompatProvider(LLMProvider):
         if self._spec and self._spec.name not in ("openai", "github_copilot"):
             return False
         if self._api_type == "responses":
-            return self._responses_circuit_allows_probe(model, reasoning_effort)
+            # Explicit configuration means Responses is mandatory; do not
+            # consult the circuit breaker or fall back to Chat Completions.
+            return True
         if self._spec is None or self._spec.name != "github_copilot":
             if not _is_direct_openai_base(self._effective_base):
                 return False

tests/providers/test_responses_circuit_breaker.py

@@ -39,6 +39,15 @@ def test_api_type_responses_forces_responses_for_openai(provider):
     assert provider._should_use_responses_api("gpt-4o", None) is True
 
 
+def test_api_type_responses_ignores_circuit_breaker(provider):
+    provider.default_model = "gpt-4o"
+    provider._api_type = "responses"
+    provider._responses_failures = {"gpt-4o|gpt-4o|": _RESPONSES_FAILURE_THRESHOLD}
+    provider._responses_tripped_at = {"gpt-4o|gpt-4o|": 0.0}
+
+    assert provider._should_use_responses_api("gpt-4o", None) is True
+
+
 def test_api_type_responses_does_not_force_non_openai(provider):
     provider._spec = type("Spec", (), {"name": "custom"})()
     provider._api_type = "responses"