Unexpected non-whitespace character after JSON at position X

[Adebesin-Cell]

Hi 👋,

I'm working on output parsers to extract content, but I'm running into an issue. Sometimes it works fine, but other times I get the error:

Unexpected non-whitespace character after JSON at position X

Is there something I'm doing wrong, or a way I can avoid this? Here’s my setup:

const parser = StructuredOutputParser.fromZodSchema(
  z.object({
    hook: z
      .string()
      .describe('The hook post that creates intrigue and mystery'),
    reveal: z
      .string()
      .describe('The reveal post that provides context and details'),
  }),
)

const promptTemplate = ChatPromptTemplate.fromTemplate(template)

const chain = RunnableSequence.from([
  promptTemplate,
  new OpenAI({
    modelName: config.modelName,
    temperature: 0.7,
  }),
  parser as any,
])

const response = await chain.invoke({
  title,
  content,
  sourceLink,
  customInstructions,
  today: new Date().toLocaleDateString(),
  format_instructions: parser.getFormatInstructions(),
})

Would appreciate any guidance! 😊