Expected Behavior

Users should be able to use Spring AI's native structured output integration with Mistral AI:

ChatClient.create(mistralChatModel)
    .prompt("Generate a movie review")
    .advisors(AdvisorParams.ENABLE_NATIVE_STRUCTURED_OUTPUT)
    .call()
    .entity(MovieReview.class);

This requires MistralAiChatOptions to implement StructuredOutputChatOptions, similar to OpenAiChatOptions.

Current Behavior

MistralAiChatOptions only implements ToolCallingChatOptions:

public class MistralAiChatOptions implements ToolCallingChatOptions { }

This prevents native structured output integration. When using .entity(Class), the check in ChatModelCallAdvisor fails:

chatClientRequest.prompt().getOptions() instanceof StructuredOutputChatOptions
// → false for MistralAI, falls back to prompt-based instructions

Users must manually generate and inject the JSON schema as a workaround.

Context

• Mistral AI's API supports structured outputs with JSON schema