My understanding of the calibre project from watching it over the years, is that improvements are typically not welcome. Kovid Goyal already has what he wants,

My understanding of the calibre project from watching it over the years, is that improvements are typically not welcome. Kovid Goyal already has what he wants, and if you any everyone one else want something else, you’ll need to fork (and then maintain) He’s done amazing work, but he’s one of those very opinionated people that can quickly and arbitrarily become weirdly hostile to things, even when others offer to do the work.