Every AI Agent Disaster This Year Was a Write Without a Checkpoint

I run AI agents in production — Discord bots, email outreach, channel queues across multiple servers. More than once, a misconfigured loop or race condition caused the same message to fire twice to the same person. Same email, same channel, same queue. Nobody died. No lawsuit. But every duplicate erodes a little trust. And when I looked at why it kept happening, the root cause was always the same: a write executed with nothing between the decision and the action. Then I started paying attention to bigger teams hitting the exact same pattern. It's happening everywhere Air Canada had a chatbot that fabricated a bereavement fare refund policy out of thin air. A customer relied on it, got denied, and sued. Air Canada argued the chatbot was "a separate legal entity responsible for its own actions." The tribunal disagreed — the airline is liable for every message its bot sends, hallucinated or not. Cursor's support bot "Sam" told users their subscriptions were limited to a single active sess