I recently vibe coded an e2e encrypted file vault for myself. I use it a lot. It also has built in offline music player and read-it-later.

I also have built a p2p based remote shell to manage my servers. Also works well.

Many programs today are part-written by AI. The only fully AI-written program I know of is Claude Code.

does a game count?

I use it everyday for actual business software, but I can't share that with you.