In context of e-commerce web extraction, invalid JSON can occur especially in edge cases, for example:

price: z.number().optional() -> price: “n/a”

url: z.string().url().nullable() -> url: “not found”

It can also be one invalid object (e.g. missing required field, truncated input) in an array causing the entire output to fail.

The unique contribution here is we can recover invalid nullable or optional field, and also remove invalid nested objects in an array.