The AgentHub unit makes /root inaccessible (InaccessiblePaths=), so root's
npm failed at mkdir /root/.npm with ENOENT (exit 254). A sudo run now passes
--cache /var/cache/agenthub-9router-npm; the sudoers rule names that argv.
Settings → AI Proxy gains an admin-only Update 9router button beside
Config 9router. One in-memory job (server/lib/nine-router-update.js) stops
9router (its user unit, else this account's own 9router processes), runs
npm install -g --prefix <its prefix> 9router@latest (sudo -n only when
sudoers already allows it, probed before anything stops), then relaunches
it hidden only if it was running. A failed update still relaunches the old
version. Nothing in the request names a command, path or package.
nntrivi2001