Scripting
Apfs
APFS space efficiency techniques for macOS developers. Use when copying files, cloning card bundles, creating build sandboxes, or writing Rust code that copies directories on macOS. Trigger phrases: "copy-on-write", "clonefile", "cp -c", "COW clone", "APFS", "ditto vs cp", "sparse file", "bop new card bundle". Covers clonefile() syscall, cp -c, ditto, sparse files, disk images, and snapshots.