Transparent compression with Folder Actions in macOS

🫧 Open on Bubbles I just wired this up for my own build folder—where Xcode quietly piles up derived data and archives that eat gigabytes—and figured it was worth writing down. The same trick works on any big codebase, a pile of assets, or a crowded /Applications folder. It relies on transparent file system compression (sometimes called AFSC), which has been built into macOS for years. It’s nothing like a zip archive: files aren’t bundled up or locked away—they keep their names, stay right where they are, an