The keybase command line tool lacks Tab completion for zsh (see Issue #519 in the Keybase Bugtracker). So this'll provide auto-complete for keybase so you don't need to remember all those pesky arguments, designed to work with oh-my-zsh but should work with others zsh setups too.
To install put the keybase folder inside your ~/oh-my-zsh/custom/plugins/ directory and enable it within your .zshrc file.
Contributions welcome, open a PR. This is a pretty rough script, there are a few commands that could get some auto complete for sub-commands.
0.1
I've signed the whole directory (in the master branch), you can check that with keybase
keybase dir verify
MIT