I made almost a similar thingy when I was working for a freelancing agency last summer. Its not packaged like yours, and was meant to be used internally. Since then i have put it on my github[0].

Only thing I am proud of in that project is the firebase support. Since I was managing my tasks on 2-3 computers, I had to build something that syncs itself. I am thinking of packaging this thing, so that other people can use it in thier command line.

[0]:https://github.com/FalloutX/cmd-todo