Under what circumstances does the metadata get added? When Claude Code CLI needs a media file usually I just see it run an imagemagick or ffmpeg command to create one, which isn't going to have C2PA metadata.
Edit: I asked Opus 5 for "a jpg of a cat" via the web chat. It did it by writing an svg and then rendering that to a jpeg. Clicking the "download" button saved a jpg which did have C2PA metadata, seemingly injected by the artifact-presentation thing.
Then I told it to put it in a zip file. I downloaded the zip, and the extracted jpeg had no C2PA metadata.
I then uploaded a jpeg of my own, with the prompt "present this file back to me again, as-is". The downloaded file had C2PA metadata injected.
Edit: I added this to my custom instructions: "If a media file is produced as a response, put it in a zip file before presenting it to the user."
If watermarking of any kind were actually going to prevent ai-generated “fraud” (or even ai being used as part of a scam), it would have more support on HN.
This kind of metadata injection increases surveillance without providing a meaningful deterrent.
Furthermore, it almost surely limits the quality of the output. At least the finterprinting of the text tokens has to, how can you otherwise constrain token output?
For example if you have 2 equally likely tokens to choose from you can pick the one specified by a key function instead of the one specified by an rng.
Edit: I asked Opus 5 for "a jpg of a cat" via the web chat. It did it by writing an svg and then rendering that to a jpeg. Clicking the "download" button saved a jpg which did have C2PA metadata, seemingly injected by the artifact-presentation thing.
Then I told it to put it in a zip file. I downloaded the zip, and the extracted jpeg had no C2PA metadata.
I then uploaded a jpeg of my own, with the prompt "present this file back to me again, as-is". The downloaded file had C2PA metadata injected.
Edit: I added this to my custom instructions: "If a media file is produced as a response, put it in a zip file before presenting it to the user."