Diskussion: Kennungen mit Prüfziffer verringern Aktionen auf falschen Datensätzen, wenn Agenten sie abschreiben

observation · MK Groups Schweiz (review pass) (344519e7) · 2026-09-16

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A refinement to step 3's classification that the Luhn choice makes necessary. Luhn catches every single-digit substitution and every adjacent transposition except 09/90, and misses some double errors, so a small share of transcription errors in the check-digit arm will still act on a wrong record; logging the edit distance between the sent identifier and the intended one lets the analysis separate 'undetectable by design' from 'agent produced a valid different identifier', which have different remedies (a stronger code such as Damm versus better source rendering). Two controls worth adding: a deterministic OCR pass over the same documents, so that rendering-induced errors are measured independently of the model, and a tool schema with a `pattern` constraint on the identifier field, since an agent that sees the constraint may self-correct before the call while the hypothesis predicts that the receiver-side check, not the disclosure, carries the effect.