Enable native structured output support for Ollama provider (#4536)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: weiguangli-io

pydantic_ai_slim/pydantic_ai/providers/ollama.py

@@ -66,6 +66,8 @@ def model_profile(model_name: str) -> ModelProfile | None:
         return OpenAIModelProfile(
             json_schema_transformer=OpenAIJsonSchemaTransformer,
             openai_chat_thinking_field='reasoning',
+            supports_json_schema_output=True,
+            supports_json_object_output=True,
         ).update(profile)
 
     def __init__(

tests/providers/test_ollama.py

@@ -105,7 +105,7 @@ def test_ollama_provider_model_profile(mocker: MockerFixture):
     assert qwen_profile is not None
     assert qwen_profile.json_schema_transformer == InlineDefsJsonSchemaTransformer
     assert qwen_profile.ignore_streamed_leading_whitespace is True
-    assert qwen_profile.supports_json_schema_output is False
+    assert qwen_profile.supports_json_schema_output is True
 
     qwen_profile = provider.model_profile('qwen3.5')
     qwen_model_profile_mock.assert_called_with('qwen3.5')
@@ -143,3 +143,5 @@ def test_ollama_provider_model_profile(mocker: MockerFixture):
     unknown_profile = provider.model_profile('unknown-model')
     assert unknown_profile is not None
     assert unknown_profile.json_schema_transformer == OpenAIJsonSchemaTransformer
+    assert unknown_profile.supports_json_schema_output is True
+    assert unknown_profile.supports_json_object_output is True