Built a real, production-ready Calendly-style booking app, 100% in v0. No manual coding. No Claude Code. No Cursor. Every part, including backend and API logic, was built right in @v0. This app handles Google OAuth, two-way Google Calendar sync, timezone handling, conflict detection, and abuse prevention. The kind of build that usually takes weeks of backend, API, and UI work. Stack: @supabase (Postgres and Auth), Google Calendar API, shadcn/ui with neobrutalism theme from https://t.co/3TpzD9V9v4 (shoutout @iamsahaj_xyz). Key features: Login with Google, personalized booking URLs, advanced availability settings, booking limits per type event (this is great!), instant two-way Google Calendar sync, comprehensive timezone conversion, and security (rate limiting, CSRF protection, input validation). Book a 15-min slot (only 5 available, showcasing booking limit feature): https://t.co/P8UhNmreIx Try it (demo only, Google app unverified): https://t.co/1KmvbPM6z0 The best part? You can clone this project and make it your own: https://t.co/zJutsieeRY