Dota 2 Lua Plugins

Question

Lua

Who has experience writing plugins for the source engine? Features of Dota 2. As I understand the structure of Valve games
This is the folder with the game inside the mod folder, and then the folder with addons. (Dota 2 beta(game folder)/dota(mod folder)/addons(addons folder). So how do you write addons? and in what order dota loads them