Google Remy and Meta Hatch: The Technical Architecture Behind 24/7 Personal AI Agents Two big AI agent stories broke this week that every developer building on top of AI should study closely. Google is internally testing Remy , a 24/7 Gemini-powered personal agent that can make purchases, send emails, schedule meetings, and take proactive action across Gmail, Calendar, Docs, Drive, GitHub, WhatsApp, Spotify, and more. Meta has built Hatch , an agentic assistant living inside Instagram (2B+ users), currently running on Anthropic's Claude before switching to Meta's own Muse Spark model at launch. Both represent the same architectural bet: the perceive-plan-act loop replacing the prompt-response loop. Here is what that means technically.…