I have a question about how you intend to deal with LLM applications where the output is more creative, e.g. an app where the user input is something like "write me a story about X" and the LLM app is using a higher temperature to get more creative responses. In these cases I don't think it's possible to represent the ideal output as a single string -- it would need to be a more complicated schema, like a list of constraints for the output, e.g. that it contains certain substrings.
TIA!