A JSON document may parse successfully while silently discarding an earlier duplicate key. Some parsers also accept NaN or Infinity even though those tokens are outside standard JSON.
The reveal supplies an original strict-loading gate for Python, nested duplicate-key fixtures, a size bound and clear limits. It is intended for configuration reviews and data handoffs where silently choosing the last repeated value would be a defect.
Tested with CPython 3.12 on 18 October 2026. This is a syntax/duplicate-key gate, not a JSON Schema validator or a guarantee against every resource-exhaustion input. #JSON #Configuration
The reveal supplies an original strict-loading gate for Python, nested duplicate-key fixtures, a size bound and clear limits. It is intended for configuration reviews and data handoffs where silently choosing the last repeated value would be a defect.
Tested with CPython 3.12 on 18 October 2026. This is a syntax/duplicate-key gate, not a JSON Schema validator or a guarantee against every resource-exhaustion input. #JSON #Configuration
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