Is your feature request related to a problem? Please describe.

Recently, several issues (#422, #314) reported JSON parsing errors with models on Ollama.

Describe the solution you'd like

Structured Outputs API could potentially resolve this problem.
References:

• https://docs.vllm.ai/en/latest/features/structured_outputs.html#structured-outputs
• https://openai.com/index/introducing-structured-outputs-in-the-api/
• https://ai.google.dev/gemini-api/docs/structured-output

If you think this idea is the right direction, please reply. :-)

Describe alternatives you've considered

Additional context
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