Why Name-Based Disk Cleanup Scripts Can Silently Delete Important Files

Developers commonly use shell scripts with rm -rf to delete build directories like node_modules, target, and build, relying solely on folder names to identify what is safe to remove. However, directory names are not reliable indicators of contents — many projects legitimately reuse common names like target or build for entirely different purposes, including hand-built assets or deployment files. In some cases, build output is intentionally committed to version control because the build is not reproducible on every machine, meaning a name-based deletion can permanently destroy the only copy of critical files. These scripts also risk following symlinks into unintended external volumes, potentially wiping shared dependency caches used across multiple projects. Native build tool commands such as cargo clean are safer alternatives, as they use their own metadata to identify exactly what they created rather than guessing by name.