Why do AI-generated apps get harder to change over time?
Because a prompt is not a durable record of the system. Each new change makes the model re-read the codebase and infer intent that was never written down, so small misreadings accumulate. The code keeps compiling while it stops matching your mental model of it.
From AI app builders compared: v0, Bolt, Lovable, Replit, updated 9 August 2026. That article is where the reasoning behind this answer is set out, including what it does not cover.