Give it a JSON schema, inject a '{', and sometimes do a bit of custom parsing on the response

I would hope that this is not what OpenAI/Anthropic do under the hood, because otherwise, what if one of the strings needs a lot of \escapes? Is it also supposed to newer write actual newlines in strings? It's awkward.

The ideal solution would be to have some special tokens like [object_start] [object_end] and [string_start] [string_end].