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Posts tagged Cost Control

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AI EngineeringMay 14, 2026

AWS Agent Toolkit GA: How I Gave an Agent 15,000 AWS APIs Without Losing Sleep

AWS released the Agent Toolkit for AWS on May 6, 2026 -- a managed MCP server exposing the full AWS API surface to autonomous agents. I shipped an infrastructure agent the same week. Here's the two-phase safety pattern that lets you hand an agent the keys to your account without waking up to a $10K bill.

9 min read
AI EngineeringMay 9, 2026

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.

13 min read
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