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My prompt-injection fix caught 0 of 20 attacks. The part I almost didn't build caught all of them.

This story is from 2026-09-27. It is preserved in the archive; the latest stories are on the live feed.

I built a checker for AI-drafted answers to retirement questions ( retirement-answer-check ). Before a customer sees a draft, it decides SEND or REVIEW. Plain code checks every number against an IRS-sourced facts table. Two model "judges" handle what code can't read: non-numeric wrong facts ("yes,…

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  1. 2026-09-27 02:45 · DEV Community — AI
    My prompt-injection fix caught 0 of 20 attacks. The part I almost didn't build caught all of them.

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