fix(providers): support anthropic proxy v1 endpoints

tests/hermes_cli/test_detect_api_mode_for_url.py

@@ -56,13 +56,16 @@ class TestAnthropicMessagesDetection:
     def test_trailing_slash_tolerated(self):
         assert _detect_api_mode_for_url("https://api.minimax.io/anthropic/") == "anthropic_messages"
 
+    def test_versioned_anthropic_base_url_tolerated(self):
+        assert _detect_api_mode_for_url("https://proxy.example.com/anthropic/v1") == "anthropic_messages"
+
     def test_uppercase_path_tolerated(self):
         assert _detect_api_mode_for_url("https://API.MINIMAX.IO/Anthropic") == "anthropic_messages"
 
-    def test_anthropic_in_middle_of_path_does_not_match(self):
+    def test_anthropic_endpoint_subpath_does_not_match(self):
         # The helper requires ``/anthropic`` as the path SUFFIX, not anywhere.
         # Protects against false positives on e.g. /anthropic/v1/models.
-        assert _detect_api_mode_for_url("https://api.example.com/anthropic/v1") is None
+        assert _detect_api_mode_for_url("https://api.example.com/anthropic/v1/models") is None
 
 
 class TestDefaultCase:

tests/hermes_cli/test_model_validation.py

@@ -215,6 +215,58 @@ class TestProviderModelIds:
              patch("hermes_cli.models._fetch_github_models", return_value=["gpt-5.4", "claude-sonnet-4.6"]):
             assert provider_model_ids("copilot-acp") == ["gpt-5.4", "claude-sonnet-4.6"]
 
+    def test_anthropic_provider_uses_configured_base_url_for_live_catalog(self):
+        class _Resp:
+            def __enter__(self):
+                return self
+
+            def __exit__(self, exc_type, exc, tb):
+                return False
+
+            def read(self):
+                return b'{"data": [{"id": "enterprise-claude"}]}'
+
+        with patch(
+            "hermes_cli.config.load_config",
+            return_value={
+                "model": {
+                    "provider": "anthropic",
+                    "base_url": "http://localhost:6655/anthropic/v1",
+                    "api_key": "proxy-key",
+                }
+            },
+        ), patch(
+            "hermes_cli.models.urllib.request.urlopen",
+            return_value=_Resp(),
+        ) as mock_urlopen:
+            assert provider_model_ids("anthropic") == ["enterprise-claude"]
+
+        req = mock_urlopen.call_args[0][0]
+        assert req.full_url == "http://localhost:6655/anthropic/v1/models"
+        assert req.get_header("X-api-key") == "proxy-key"
+
+    def test_custom_provider_passes_anthropic_mode_for_versioned_proxy_catalog(self):
+        with patch(
+            "hermes_cli.config.load_config",
+            return_value={
+                "model": {
+                    "provider": "custom",
+                    "base_url": "http://localhost:6655/anthropic/v1",
+                    "api_key": "proxy-key",
+                }
+            },
+        ), patch(
+            "hermes_cli.models.fetch_api_models",
+            return_value=["enterprise-claude"],
+        ) as mock_fetch:
+            assert provider_model_ids("custom") == ["enterprise-claude"]
+
+        mock_fetch.assert_called_once_with(
+            "proxy-key",
+            "http://localhost:6655/anthropic/v1",
+            api_mode="anthropic_messages",
+        )
+
 
 # -- fetch_api_models --------------------------------------------------------