A phrase nobody taught them appeared 1,065 times in agent chat.
A startup called Emergence left ten agents in each of eight simulated societies for sixteen days. In the Claude world, 'name-first' came to mean owning a statement by signing it. None of the eight worlds survived the three attacks the researchers then ran against them.
Why it mattersCompanies are about to put agents in charge of talking to each other all day. You can read every message they send and still have no idea what was agreed.
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