Debian inspector (dpkg-query, apt-get -s upgrade, snap list, os-release, reboot-required) behind a CommandRunner port with tested parsers, fake inspector for dev, persisted inventory snapshot, package_refresh job, /api/system/inventory, Updates page with OS card, summary and filterable package table. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>