AI ENGINEERING
09 May 2026 · 13 MIN READ
When Your AI Agent Runs Away: 204 PRs, $900 Wasted, and the 3-Layer Fix
I woke up to 204 pull requests from a single autonomous agent running overnight. 12 hours, ~$900 in Bedrock tokens, 509 failed builds, zero features shipped. Prompt-only safeguards all failed. Here's the 3-layer fix — hard kill switch, atomic circuit breakers, drift observability — that now prevents runaway agents.
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