{
  "title": "phone_focus_mode: fix YouTube DNS blocking via netd cache restart",
  "objective": "Android 13's netd process caches /etc/hosts entirely in memory at startup and never re-reads from disk. The existing bind-mount approach changes the on-disk file but not the live resolver cache, so blocked domains continued to resolve. Fix: restart netd exactly once after applying the bind mount, using PID-stamp deduplication to prevent double-restarts that corrupt ConnectivityService's routing table.",
  "acceptance_criteria": [
    "www.youtube.com resolves to 0.0.0.0/127.0.0.1 (blocked) after deploy",
    "youtube.com resolves to 0.0.0.0/127.0.0.1 (blocked) after deploy",
    "google.com resolves to a real IP (network is up, not over-blocked)",
    "Blocking persists after a clean reboot (Magisk module path verified)",
    "deploy.sh completes without network disruption beyond the expected ~4s during single netd restart",
    "pre-commit passes on all changed files (shellcheck, codespell, all hooks)"
  ],
  "out_of_scope": [
    "Firefox UI verification",
    "googlevideo.com CDN blocking",
    "FOCUS_BOOT_AUTOSTART=1 boot path testing",
    "mid-session domain addition without reboot"
  ],
  "verifier": "ping tests via ADB after reboot and after fresh deploy; pre-commit run on changed shell files"
}