Sovereign scope amendment (2026-07-19): staff conversations move from SMS to an IN-APP AI chat — each staff member gets their own AI-assistant section in the staff portal; conversations happen there. SMS/Twilio stays wired but reserved for future notifications. Ratified architecture otherwise unchanged (one engine, LLM proposes / code validates, availability confirm before solver, GM gates). Simplifies v1: drops SMS parse ambiguity, 10DLC exposure, per-message cost; staff identity = authenticated session instead of phone-number binding.