- unified-backup.zsh: dedup-aware machine MOVE phase + efficient 2TB COPY (rsync --ignore-existing, no full re-hash). Writes into canonical X10 tree. - backup3.conf: canonical X10 targets; USE_ONEDRIVE=no (launchd OneDrive deadlocks) - machines/*.conf: canonical mapping; 2TB phase on Studio only - launchd: point com.psingletary.backup3 at unified-backup.zsh --apply - docs: UNIFIED-BACKUP-MAPPING.md (design + resolved decisions) - fixed zsh 5.9 quirk: per-iteration 'local' printed assignments (hoisted to fn top)