I noticed that most of weapons mods have

[stiff sinew]

About this, is there a way to add a mod as a dependency when you already started working on the mod?

[icy edge]

in the workbench go options and add the gui id there

[stiff sinew]

Sweet, thank you.

[grand plinth]

Updated to 0.0.2 - there was a silly issue with types not actually visible in attributes.
Thanks @stiff sinew for finding it.