Workshop Framework attempts to open up the settlement system in a way that many mod authors can contribute (and not just coders either! There are tons of things even the greenest mod author can take advantage of). It has immediate benefits to players outlined in the Player Focused Features list below.
This is a required mod for Sim Settlements 2.
Download: Workshop Framework
IMPORTANT NOTE: Any other mods that altered workshop scripts will break this and are likely incompatible. The exception is the Unofficial Patch which should be placed before this in your load order so that the additional script changes made by Workshop Framework will overwrite the UFO4P versions.
OPTIONAL FILE: Workshop Framework can now detect when Workshop Scripts have been overwritten by another mod. If that happens to you, download the optional file called Workshop Framework Script Override.
Put this optional file at the very bottom of your load order to ensure you have the correct Workshop Scripts!