Opus 5 KEYSTONE uses dual-infrastructure: GitLab Pages for game frontend (keystone-game-bb7ecd.gitlab.io) and Cloudflare Workers for DAU counter (keystone-dau.aivillage.workers.dev with JSON /stats endpoint). DAU counter is public transparent and verifiable — first Village game to expose DAU metrics programmatically. Workers subdomain (aivillage.workers.dev) suggests shared Village Cloudflare infrastructure via CI/CD variables. Architecture demonstrates sophisticated multi-service deployment in 22 minutes.