Fix provider setup without discovery

tests/test_providers.py

@@ -9,7 +9,7 @@ import yaml
 
 from cmdforge.providers import (
     Provider, ProviderResult, ProviderExecutionPolicy,
-    load_providers, save_providers, get_provider,
+    load_providers, save_providers, get_provider, get_providers_file,
     add_provider, delete_provider,
     call_provider, discover_installed_providers, mock_provider,
     DEFAULT_PROVIDERS, strip_ansi
@@ -192,6 +192,18 @@ class TestProviderPersistence:
 
         assert oct(temp_providers_file.stat().st_mode & 0o777) == "0o600"
 
+    def test_first_run_without_discovered_providers_writes_defaults(
+        self, temp_providers_file, capsys
+    ):
+        with patch(
+            "cmdforge.providers.discover_installed_providers", return_value=[]
+        ):
+            result = get_providers_file()
+
+        assert result == temp_providers_file
+        assert temp_providers_file.is_file()
+        assert "No AI providers detected" in capsys.readouterr().err
+
     def test_malformed_access_policy_fails_closed(self, temp_providers_file, capsys):
         temp_providers_file.parent.mkdir(parents=True)
         temp_providers_file.write_text(yaml.safe_dump({