Running lua commands on your combinator! Check out LuaCombinator3
Mods introducing new content into the game.
Entities which interact with the circuit network.
I've just installed this mod and it's a great implementation. However there is a documentation for the language used to program this combinator? :D
https://lua-api.factorio.com/latest/index.html https://www.lua.org/pil/contents.html#P1 store your data either in the var[] table (per combinator) or in the global[] table if you want to use events, use https://mods.factorio.com/mod/LuaCombinator3 instead.
Thanks :D