A how-to for giving shared aspects per-host knobs. If you build configurations with Den (or any dendritic / aspect-oriented Nix setup), this guide shows how to let an aspect expose a few typed values — a disk device id, a kernel optimization target, a BGP AS number — that each host fills in, without forking the aspect.
It is written to be replicated in your own configuration, not just read as a description of one repo. It has two parts:
