This is an old revision of the document!
Important! if you try to test your mission in editor and arma3 will give error that script not found, this is because devs in their wisdom added requirement for “-filePatching” startup parameter. If you are not using this parameter then you cannot use scripts in your mission directory (they still work in a PBO), add the parameter and then your mission dir scripts work fine again. Sigh. Tested on arma3 v1.66.139586