packages/sync-omarchy-repo.sh diffs the upstream omarchy.db against the
registry's own db by filename, streams missing packages through (409 =
already present), and deletes entries upstream no longer lists. Only a
404 counts as first sync; any other mirror-db failure aborts rather
than faking an empty mirror.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019hLK3wsDuKVAC37GgDqg6H
