With the owner gate in place, a signed-in owner no longer needs another
launcher first (brief mc-download-1, Ludovic 2026-10-27).
- The Play page's Resources row offers an owner "Download and prepare"
and "From my install"; without an owner it asks to sign in first.
- `horizon-launcher prepare --download` does the same.
- Every file from Mojang must have the size and sha1 Mojang lists.
- The download shows its progress and has Cancel; files already whole
are kept, so the next try goes on where it stopped.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie
610c2f3c10