I Let Claude Code Run Unattended for 108 Hours. Here's Every Accident That Happened.

I let Claude Code run while I slept. Checked once a day. Did this for two months. 108 hours of unattended AI operation. The result: 50x failures than I expected. The Full Accident List Accident 1: rm -rf src/ Claude Code said "cleaning up to a fresh state" and ran rm -rf./src/. First time, I recovered from a git backup. Second time, I lost 2 hours of work because the backup interval was too wide. Accident 2: API Cost Runaway A sub-agent entered a loop hitting an external API. $8 in one hour. I noticed the next morning. 4% of the monthly budget, gone in 60 minutes.