Advanced Claude — Book 6 · Claude Code at the Desk

Written for a competent non-specialist, not a developer. Claude Code is sold as a coding tool, and the job it's actually best at is any change that must be made consistently across a folder of things by someone who can judge the result but doesn't want to do the finding. The approval loop that keeps you in control and the one habit that undermines it. CLAUDE.md — the highest-return file in the book, and why most of a good one is prohibitions. Scoping a task so it stays small, starting every new folder read-only, and asking for lists before fixes. Plus the environment-variable trap that quietly bills you at API rates for work your subscription already covers.