Comment by CharlieDigital

It's funny, I've been literally trying to convey these exact sentiments to my team over the last few days down to the:

    > Need to build a whole new feature to test it? Have you tried putting a button in the existing UI and seeing if people click it?

Pretty much word for word.

It feels like engineers are collectively feeling the pain now that product has decided that engagement of mental faculties is no longer necessary on their behalf; just build it and figure out the user persona and utility later...if ever. What used to be a process of taking the time to understand the domain, the user, and how the product fits into some process has been tossed out the window; just ship whatever we think some imaginary user wants and experiment until we succeed.

It creates the exact problem that OP talks about: every random feature that gets vibe-coded becomes a source of instability and risk; something that can then only be maintained via more vibe coding because no one has a working mental model of the thing.