If it's an interface to ffmpeg, then sure, the GUI could be extremely complicated code.

But that's not what we are talking about, is it? We are talking about an interface to a chatbot that can accept and return chats, accept and return files, and run a selection of internal commands (which include invoking itself recursively).

The interface to this chatbot that has a settings entry for "personality" is still only going to map that to one of a small number of chatbot inputs. Same with basically anything else (read the skills file, etc).

I dunno... maybe 500kSloC for a fancy IRC client is the going rate, but the last time I wrote an interface to a chat client, it was barely 10k lines, not counting the lib*.so that the the program called to interact with the chatbot, with said chatbot supporting file uploads and '/' commands.