I made this to serve my own need (which it does), to allow my Synology NAS a clean shutdown in case of a power cut. My UPS is not recognized if plugged into the NAS via USB, so it is plugged into a different (SBC) computer instead, which runs this.
Speaking of prior art, I am only aware of this one: https://github.com/luizluca/nut-snmpagent
I am not a fan of Ruby and I only trust software I wrote (a.k.a.: I prefer my own bugs in critical pieces of my infra), so here it is.
Posting in case someone else finds it useful, but will answer more general questions (should they come up) as well.
