Diskloom scans for exactly three categories of developer bloat — stray node_modules folders, Xcode DerivedData and Archives, and Docker image usage — and leaves everything else on the disk alone, so Photos and Documents never enter the picture. Everything it reclaims goes to Trash rather than straight deletion, and regenerable folders like node_modules simply reinstall the next time you build. Scanning is free; a $29 one-time license unlocks the actual reclaim, covering up to three Macs.