I usually see the word "metafiction" applied to works that draw attention to their own devices, their own artificiality, in order to mock novelistic convention and show the impossibility of capturing a reality external to the text or whatever.

Every relationship can feel saturated by market logic or at best purchased at the price of the immiseration of others.

Your interviews or blog posts or whatever are less supplements to your novel than part of it. I'm not private, but I believe in literary form - I'll use my life as material for art (I don't know how not to do this) and I'll use art as a way of exploring that passage of life into art and vice versa, but that's not the same thing as thinking that any of the details of my life are interesting or relevant on their own.

The scare quotes burn off like fog.

I've been building a fiction in part around the Marfa poem since my brief residency there, which has kept it from receding into the past.

Maybe that's the way I'm private - I respect the privacy of "my" characters? Anyway, we're getting close to the whole "relatability" and "likability" thing.

The story and the poem are obviously changed by being placed in the novel, so in a sense they're no longer the works that preceded the novel.