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zqxwceandClaude Fable 5
9f7e21402a
Export previously hardcoded xz -9 (the densest but slowest libarchive
compressor), forcing a multi-GB Disk.img through the most aggressive
setting on every export.
Add a `--compress {fast,balanced,max}` preset on `vphone vm export`,
default `balanced`:
fast zstd -3
balanced zstd -19 (new default)
max xz -9 (previous behavior)
All presets go through the same system /usr/bin/tar (libarchive) already
used for xz, so no new dependency and no raised platform floor. Import is
unchanged: it already auto-detects the compressor via `tar -tf`/`-xf`, so
zstd and xz archives both import.
Tests assert each preset's magic bytes (zstd vs xz), that fast/max
round-trip, and the default is zstd. README examples updated.
Co-Authored-By: Claude Fable 5 <[email protected]>
