It looks like you thesaurused a less common word for a job done by more common ones.
Never heard of "capability fabric" but I do wonder if it pulled it straight from https://naftiko.io/glossary/capability-fabric/
I'm not saying you are wrong, just pointing out that we all have idiolects that make us make word choices others wouldn't. Also, I didn't think ChatGPT were doing text watermarking. Isn't it just Claude and Gemini so far?
That glossary also reads like this:
Why it matters Without a fabric, integration complexity grows quadratically with each new system. A capability fabric linearizes this growth by providing shared infrastructure for discovery, governance, and composition – turning integration from a liability into an organizational asset.
Anyways, I'm pretty sure the only reason you'd do this (watermarking) is to be able separate your own outputs from the internet. And if you can make it a law so all the other AI companies collude even better.