AI wrote 80% of my plugin. Six months later I couldn't maintain it. (opens in new tab)

The first thing I noticed when I reopened that plugin after six months was that the same date-formatting logic lived in three places. One in a utility function, one in a class method, one inline in a template. All slightly different. The bug someone reported, a display that was occasionally off, came from the oldest of the three. Fixing it meant first figuring out which copy to touch, and whether the other two needed touching too. The bug wasn't hard. Reading the shape of my own code was. I'd...