HomiAI is a modular home companion with swappable heads: Moli for pets, Gami for seniors, Peki for kids. Moli dispenses treats, plays, and monitors health. Gami tracks vitals, detects falls, and alerts caregivers. Peki tells stories, runs games, and chats. A mobile all-terrain base roams autonomously, follows users, and doubles as a smart vacuum. The app switches personas, shows activity, and schedules tasks. Unified memory learns routines. Upgradable modules cut costs ~30% and e-waste. Open APIs link vets, family video, and local services; adaptive AI and minimalist design fit any home.