Public contributions for NMS Mod Builder:
https://github.com/cmkushnir/NMSModBuilder - latest releases, doc's, some code.
https://www.nexusmods.com/nomanssky/mods/2032 - Nexus approved release, may not be most recent.
See NMS Mod Builder GitHub page for documentation.
User contributed FAQ's are also available.
If you're looking for AMUMSS/lua scripts you're in the wrong spot:
AMUMSS - https://github.com/HolterPhylo/AMUMSS
LUA Scripts - https://github.com/MetaIdea/nms-amumss-lua-mod-script-collection