AI Can Ship Your Prototype in a Weekend. It Still Won’t Tell You If You Built the Wrong Thing

Short summary

thoughtbot's field report argues AI has collapsed the cost of shipping prototypes but not the cost of deciding what to build. Founders separate 'AI helped me build' from 'AI helped me decide what to build'—product logic, user research, and roadmaps remain human work. Production systems require different objectives than prototypes: auth boundaries, observability, migration safety, and failure-mode reasoning that generative coding tools don't optimize for. 'Vibe coding' works inside a narrow disposable envelope and breaks when the app becomes a system of record.

• •AI accelerates prototype execution but doesn't own product strategy or roadmap decisions
• •Trust and auditability gaps push founders to use AI for low-stakes experiments and call engineers for production reliability
• •Vibe coding works for disposable prototypes but breaks when apps need auth, tenancy, observability, and data-retention architecture

Generated with AI, which can make mistakes.