Scoping Rules: Global, Project, Path-Glob

A rule that fires on every file is a tax. A rule that never fires is dead code. The cost of getting scope wrong is paid every session, on every task, by every contributor and almost nobody talks about it. I want to talk about it. The three scopes in Claude Code are global (~/.claude/CLAUDE.md), project (./CLAUDE.md), and path-scoped (subdirectory CLAUDE.md, or feature docs loaded by path match). They look like a hierarchy. They behave like three different tools. The default mistake is to put everything in t