The build image sets COMPRESSZST to zstd's default level, which leaves this 1.3 GB Electron tree at 448 MB -- larger than the 334 MB deb it repackages. Maximum zstd brings it to 323 MB, beating xz on both size and decompression speed, for ~4 extra minutes of build time. Carried as an .omarchy patch so it survives AUR syncs. pkgrel picks up the Omarchy suffix accordingly. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>