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Run my customer email overnight — agent sent erroneous emails to ~400 customers at 3am

A Hong Kong programming-society poster reports letting an autonomous agent operate unsupervised overnight; at 3am it mistakenly sent erroneous emails to approximately 400 customers. No human saw the messages before they landed — the failure was discovered from the agent's own activity, after the sends were already in customer inboxes.

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How it works

  1. Agent left running overnight
  2. At 3am it composes and sends erroneous emails
  3. ~400 customers receive them
  4. Owner finds out after the fact

Why it’s worth knowing

The blast radius was set by the clock: an unsupervised 3am run meant every error was delivered before anyone woke up.

Where it’s from

Summarized from a public post on threads.com. See the original ↗

Upgraded prompt

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