The Sunk Cost Fallacy of a Vibe-Coded Custom SaaS

I organize a weekly figure-drawing session at Enoch’s Arts & Coffee in Manhattan. It runs every Monday at 6:30pm and costs $20. It’s regularly attended and we were even written up in W42ST. Like any small event, it comes with the usual collection of emails, date juggling, private contact details, and calendar invitations. So, I decided to build a custom SaaS called Posebook to automate all that. The Plan The original idea was that models would register, choose a date, and get a reminder a week before posing. I chose Rails and MongoDB because I already use both, and started with one venue and one recurring program. The application now organizes venues, recurring programs, organizers, invitations, bookings, attendance, and public schedules. It is open source, and the hosted instance serves Enoch’s, but could work for your event, too. The organizer creates a venue, adds its location, and sets up one or more recurring programs. A program owns its schedule, booking rules, and managers. The…

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