First-run output:
--------
Usage Exception: YOU NEED TO AUTHENTICATE TO CONTINUE

You are trying to connect to a server (phabricator.kde.org) that you do not have any credentials stored for.

To retrieve and store credentials for this server, run this command:

      $ arc install-certificate
--------

Create a new ticket (--create isn't required but probably wise):
> arc diff  --raw < stdin
>>
stderr: SKIP STAGING  Raw changes can not be pushed to a staging area.
Created a new Differential diff:
        Diff URI: https://phabricator.kde.org/differential/diff/xyz/

Included changes:
  M       foo
  M       bar
<<
> arc diff --create --raw-command "cat $patchfile" < template.file
>>
stderr: SKIP STAGING  Raw changes can not be pushed to a staging area.
Created a new Differential revision:
        Revision URI: https://phabricator.kde.org/Dxyz

Included changes:
  M       foo
  M       bar
<<

Updating a ticket (task):
> arc diff --update $revId
  --raw : reads from stdin
  --raw-command $command : read from the output of $command
Optionally interesting options:
  --message msg : When updating a revision, use the specified message instead of prompting.
  --reviewers unames : add reviewers

Getting the list of open things
> arc list
* Needs Review D1420: [OS X] build in a more "traditional" way (for distribution systems like MacPorts, Fink etc) (and a bit of code clean-up)
* Needs Review D1523: Project Manager View plugin has hardcoded/fixed shortcuts

Open a task:
> arc browse $id