I'm building an engine in Love2D and I need to build an editor who will create scenes with game objects I wrote in lua.

The thing is that there's this guy in my team who said : "Don't include the editor within the game, make it separate from it so you won't load the whole editor with the game itself"

So I'm asking how could I achieve this type of structure, because I want my libraries to be shared between the game and the editor.

    - MAIN FOLDER 
        | - core
        |   | core features of the engine
        | - editor
        |   | main.lua
        | main.lua

I can't see how I'll be able to require files with this structure, is there a specific way to do this kind of thing in lua ?