I don't have much time these days for maintaining diagrams, and I've gotten a bit burnt out/discouraged at the tedium of bumping upper bounds and updating packages. But lots of people still actively use diagrams (including me!) and we need to make sure that keeps up with changes in GHC, that it stays in Stackage, etc. I'm wondering if anyone (or anytwo or anythree) would be willing to help / take over maintenance.
It's a bit tedious, but it could also benefit a lot from some automation if you're excited about setting up that kind of thing. Depending how active you want to be, this could be anything from some simple maintenance up through an overhaul of our CI. I've also considered moving a bunch of diagrams packages to a single monorepo, which might make maintenance easier, though it would also have some costs. If you're convinced that would be helpful and willing to do the work for the conversion that might be something worth looking into as well.
Anyway, I could also put out a more general call e.g. on my blog, but I thought I would ask on the mailing list first!