Cannot repair JSON with an extra closing brace before additional root properties
#159 aberto em 28 de mar. de 2026
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Description
jsonrepair appears unable to repair JSON where an extra closing brace closes the root object too early, followed by additional top-level properties.
Minimal repro:
import { jsonrepair } from 'jsonrepair'
const broken = '{"a":{"b":1}}},"c":2}'
console.log(jsonrepair(broken))
CLI repro:
printf '%s' '{"a":{"b":1}}},"c":2}' | jsonrepair
Actual result:
Error: Unexpected character "," at position 14
Expected result:
{"a":{"b":1},"c":2}
The library already documents repairs like adding missing closing brackets, repairing truncated JSON, stripping trailing commas, etc. This case seems like the inverse: there is one superfluous closing brace, and removing it would make the document valid again.
I ran into this with a larger LLM-generated JSON payload where a nested object had one extra } immediately before the next top-level key, which caused the root object to close early.
If this behavior is intentional and out of scope, a note in the README about not handling superfluous closing braces would also help.