and my current belief is that these are totally independent efforts. I
tend to want this more than many, but it would be nice if each README
mentioned the other and stated that it was or was not related to or
derived from that other.
https://github.com/weewx-mqtt/publish came to being because some MQTT client I was experimenting with had very specific data format requirements. I started with a pull request to https://github.com/matthewwall/weewx-mqtt, but it was evolving to something that as I as repo owner would not want to accept. So, I decided to write an extension from scratch that served my needs. Since it seemed to replicate an existing WeeWX extension, I decided not to add it to the wiki.