On first boot create the ai_settings row (provider anthropic, empty base URL, model and key, temperature 0.7, system prompt DefaultPersonaPrompt from CTXD PROMPTS.MD §4) and a notification_prefs row per event (push on for all five, chat on for plan_ready and list_ready only). Existing rows are never changed; a missing event row is seeded on its own. cmd/server seeds household settings, AI settings and notification preferences through seedDefaults; any failure stops the boot. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>