Ask HN: Client took over development by vibe coding. What to do?

I’ve worked on a project for one year now, a marketplace web application for one of my clients. It involves a web shop frontend, integration with suppliers, payment platforms, product management, stock syncing, and much more. I built the project from scratch with open source components, guided other developers on the project, and was leading all the technical decisions. Last year I started using LLM’s for cumbersome tasks, and since the beginning of this year I started working with Claude Code to implement features. Still, I always need to think about the implementation, and actively direct and correct the bot. As many of you will know, it can speed up development, but I still need to use my more than ten years of experience as a developer. I thought the project for my client would be safe. This changed when they started developing some of their own, much smaller and simpler projects on an AI-powered no-code platform. They immediately concluded this also must be applied to the marketpl