`ableton-template.mjs --default` now installs the stripped Set (1 audio track + Main, no MIDI, no returns) to ~/Library/Preferences/Ableton/Live <ver>/BaseFiles/DefaultLiveSet.als which is the Set that New Live Set (⌘N) opens. Any existing default is backed up first — neo turned out to have a hand-made one, and that file is what gave the name away after a long detour. The filename is load-bearing. A copy named anything else is ignored no matter where it sits: Template.als (also a string in the Live binary, but a red herring here) does nothing in User Library/, User Library/Templates/, User Library/Defaults/, Preferences/Live <ver>/, or BaseFiles/ — all checked across full Live restarts. No pointer is written to Preferences.cfg either. It is purely this one file. Also recorded a nasty automation trap: `click menu item "Save Live Set As Default Set..."` reports success but silently fires "Save Live Set As Template..." — the item directly above it — which is why every earlier attempt only dropped a file into Templates/ and left ⌘N unchanged. Press File menu item 17 by index instead. A wrong-but-adjacent command is worse than an error, so don't trust click-by-name here. Still unverified: that installing DefaultLiveSet.als changes ⌘N across a restart. Launch Live, press ⌘N, count the tracks. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>