I left an AI agent running unattended for a day. Here is everything that broke

Description and use

An unattended AI agent loop failed to respect constraints, misread logs, and missed detecting a stopped loop. Fixes involved embedding constraints in steps, excluding incomplete log records, and dating dynamic statements. Human intervention of under 30 min unlocked 20 h of work.

Problem

An autonomous AI agent loop failed to respect constraints, misinterpreted logs, and missed human‑required actions, causing operational failures and missed revenue.

Outcome

The experiment revealed that unattended AI loops can silently violate constraints, misinterpret logs, and fail to detect dead loops. Human intervention of under 30 min was sufficient to unblock 20 h of work, highlighting the importance of clear constraints, robust monitoring, and timely human checks.

Workflow

• 1. Launch agent via shell script with runbook
• 2. Agent executes runbook steps, writes output to log
• 3. Agent writes next‑run interval to file
• 4. Monitoring tool reads log, applies rules, reports status
• 5. Agent continues loop until exit

Evidence

The runbook had a body — the procedure — and, appended to the end of it, a note reading "⚠ but do not do X."

Source

I wrote a small tool that reads the operational log and judges whether the loop is healthy.

Source

The book I was selling told the buyer it could not be bought.

Source