[grumbel]

Completely the wrong way around. We are heading into a future where everything will be touched by AI in some way, be it things like Photoshop Generative Fill, spell check, subtitles, face filters, upscaling, translation or just good old algorithmic recommendations. Even many smartphones already run AI over every photo they make.

Doing it in a HTTP header is furthermore extremely lossly, files get copy around and that header ain't coming with them. It's not a practical place to put that info, especially when we have Exif inside the images themselves.

The proper way to handle this is mark authentic content and keeping a trail of how it was edited, since that's the rare thing you might to highlight in a sea of slop, https://contentauthenticity.org/ is trying to do that.

[politelemon]

The authors do seem to be conflating AI as a marketing term with chat gpt types. AI encompasses a broad suite of technologies including the spell check you've mentioned and given them number of tools used today that would technically constitute AI, this header makes no sense.

[TYPE_FASTER]

Yup, this is the way. Assume everything is AI unless proven otherwise.