[kramdown][] is a [markdown][] parser by Thomas Leitner, which has a number of backends for generating HTML, LaTeX, and markdown again.
kramdown-respec is an additional backend to that: It allows the generation of W3C/ReSpec markup ([https://respec.org/docs/][]).
Who would care? Anybody who is writing Internet-Drafts and RFCs in the [IETF][] and prefers (or has co-authors who prefer) to do part of their work in markdown.
Start by installing the kramdown-respec gem (this automatically installs appropriate versions of referenced gems such as kramdown as well):
gem install kramdown-respec
(Add a sudo and a space in front of that command if you don't have
all the permissions needed.)