Inside a git working directory with an origin that is hosted on GitHub, you can do this (note: with the -r option, commands can be invoked from anywhere):
(github-cli)[jsmits@imac:~]$ ghi --help
Usage: ghi command [args] [options]
Examples:
ghi list [-s open|closed|all] # show open, closed or all issues (default: open)
ghi [-s o|c|a] -v # same as above, but with issue details
ghi # same as: ghi list
ghi -v # same as: ghi list -v
ghi [-s o|c] -w # show issues' GitHub page in web browser (default: open)
ghi show <nr> # show issue <nr>
ghi <nr> # same as: ghi show <nr>
ghi <nr> -w # show issue <nr>'s GitHub page in web browser
ghi open (o) # create a new issue (with $EDITOR)
ghi close (c) <nr> # close issue <nr>
ghi open (o) <nr> # reopen issue <nr>
ghi edit (e) <nr> # edit issue <nr> (with $EDITOR)
ghi label add (al) <label> <nr> # add <label> to issue <nr>
ghi label remove (rl) <label> <nr> # remove <label> from issue <nr>
ghi search (s) <term> [-s open|closed] # search for <term> in open or closed issues (default: open)
ghi s <term> [-s o|c] -v # same as above, but with details
ghi comment (m) <nr> # create a comment for issue <nr> (with $EDITOR)
ghi -r <user>/<repo> # specify a repository (can be used for all commands)
ghi -r <repo> # specify a repository (gets user from global git config)
Description: command-line interface to GitHub's Issues API (v2)
Options:
-h, --help show this help message and exit
-v, --verbose show issue details (only for list and search commands)
[default: False]
-s STATE, --state=STATE
specify state (only for list and search (except `all`)
commands) choices are: open (o), closed (c), all (a)
[default: open]
-r REPO, --repo=REPO, --repository=REPO
specify a repository (format: `user/repo` or just
`repo` (latter will get the user from the global git
config))
-w, --web, --webbrowser
show issue(s) GitHub page in web browser (only for
list and show commands) [default: False]