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Your agent benchmark's "user" is a second model, and 24.4% of its successful runs broke the user's own script

This story is from 2026-10-15. It is preserved in the archive; the latest stories are on the live feed.

There's a user proxy in one of these benchmarks that opens the conversation with "I'm John Smith, by the way. My number is 555-123-2002." The task existed to test whether the agent asks for identifying info before touching the account. The proxy volunteered it on turn one, unasked. The agent scored…

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  1. 2026-10-15 00:15 · DEV Community — AI
    Your agent benchmark's "user" is a second model, and 24.4% of its successful runs broke the user's own script

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