The app seems to be entirely vibe-coded. ("multi-agent AI development workflows are what make a one-person project at this scale practical")

However the author says he will "move from the branding".

I hope he calls it something like Notepad+++

typically trademark names that can be mistaken for another trademark in the same category are not allowed.

Ironically, like "notepad". I always find it odd how infringers feel ownership and get defensive about their infringement. Like release groups getting pissy about people reposting/renaming their releases.

Windows Notepad isn't a standalone product, but a Windows feature that has its title localized into every language as part of Windows, none of which are registered as a trademark.

And should it be considered a commercial product, Notepad alone is too generic so the trademark would probably be Windows/Microsoft Notepad, just like products named Something-Office both predate and followed Microsoft Office.

I suspect we will not see a non-vibe-coded app again. I think such days are in the past now.