This repo appears to duplicate (and maybe pre-date?) the official Click completion functionality.

Is this the predecessor to that/was that rolled into Click core at some point? If so, it might be good to:

• Indicate that this is deprecated/rolled into core at the top of the README.
• Contact the authors of open bugs and PRs on this repo and suggest that they move their issues to Click core if they're still applicable.
• Maybe archive this repository?

If this is not a dupe of the click core functionality, and is instead an alternative implementation (or internal implementation component of the Click core func), it would be good to indicate that prominently in the README.