The mirror keeps where it fetched a file beside it, and reports that and the checksum after it restarts. A model whose files the mirror cannot trace is found on the registry: a repository holding a file of that name that has the commit the mirror's directory is named after, with every file at the same size, the most downloaded first. ctl model origin and the console set one by hand, checked the same way. Commits compare shortened. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>