At the beginning of the call, add JSON parsing error detection and improvement suggestions

[ooopus]

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Discussion Topic

When generating a large amount of text, LLMs is likely to produce incorrect JSON, such as forgetting to convert one or two \ in dozens of \ to be converted into \\. It will be helpful to clearly indicate the location and reason for the error. Otherwise, only a type error will be returned, and LLMs will waste many tokens solving the error.