AI Agents — Book 6 · The File Agent

The first project where a mistake changes something real. Claude Code pointed at a folder of four hundred inconsistently named files, under an approval loop you control. Read, propose, approve, act — and why that third step is architectural rather than a setting. CLAUDE.md, and why most of a good one is prohibitions. Starting read-only every single time. Asking for a reviewable list rather than a change, then applying only the rows you read. And a reversibility test that decides which operations you may ever automate — reads freely, deletes never.