Phabricator Help

Phabricator is the software we use for development. It can be found at This page explains a couple of common things you might want to do in Phabricator.

Creating an account

You can either create an account directly or log in with your GitHub account.

Creating an account directly

To create an account via Phabricator itself, visit this page. You should then get an email with which you can confirm your account.

Creating an account via GitHub

You can also log in via your GitHub account by clicking the GitHub logo on this page.


  • If you’re not getting the verification email, please ask on Discord!
  • Similarly, if you created an account with the wrong email address, we can’t correct the address, but we can delete the account so you can try again.

Receiving updates and notifications

Phabricator notifies you about relevant activity, including your own actions.

Phabricator offers several tools to receive the notifications you wish to receive.

  • If you are interested in a single object (a task, a revision…) just click Subscribe in its page. Adding a comment will subscribe you automatically.
  • If you are interested in all the activity within a project, you can click Watch Project on the project summary page.


If you receive unexpected mail notifications for a task:

  • You might be subscribed to the task.
  • You might be a member of a project or of a subproject associated to that task. A list of all projects that you are a member of is available.
  • You might watch a project associated to that task. A list of all projects that you watch is available.
  • In your email preferences under “Maniphest Tasks”, you might have enabled “One of a task’s subtasks changes status”.
  • You might have a personal Herald rule set up. Check the “X-Herald-Rules” message header field to see a list of all applied Herald rules.

Creating a Task

There are several ways to create a task, depending on the information you want to carry:

  • A new task: click the Bookmark button toward the right side of the top navigation bar. From the dropdown menu, choose Create Tometo Task. You will get a blank form.
  • A security problem: click the Bookmark button toward the right side of the top navigation bar. From the dropdown menu, choose Report Tometo Security Issue. You will get a form pre-tagged with Security, and with a link to special instructions for filing security bugs.
  • A subtask of an existing task: click Edit Related Tasks… > Create Subtask located in the right column of the current task. The dependency between both tasks will be set, and some values of the parent task will be carried by default (Assigned To, Subscribers, Priority, Projects). Subtasks will be listed in the parent task under “Task Graph”, sorted by most recently updated.

Fill the form, leaving the fields you are not sure about unchanged. Use the live preview at the end of the page to check whether your text looks as you expect.

Commenting and editing a task

To reply, you need an account as well.

Phabricator allows you to post and edit comments and descriptions using text formatting and inserting images or other files. To insert a file, just drag and drop, paste or select it from the File Upload button. You can use toolbar at the top of the input text area and you can use Phabricator’s own formatting.

To edit the description of a task, select “Edit Task” in the side bar.

To close a task as a duplicate of another task, select “Edit Related Tasks… > Close As Duplicate” in the side bar.

Project Management in Phabricator

More detailed information about this can be found in Phabricator/Projects.

Parent tasks and subtasks

Tasks can be a parent task or a subtask of any number of other tasks. If Task A is not solved until Task B is solved, then Task A is the parent task, and Task B is the subtask. Such relations can be set via “Edit Related Tasks…”. Parent tasks and subtasks are displayed under “Task Graph” in the task. This feature can be used to accomplish a few different things:

  • Blockers and Subtasks. A (parent) task might simply be blocked by another (sub)task, representing a dependency.
  • Tracking. A “workless” (parent) task blocked by several (sub)tasks might be tracking a collection of (subtasks within a release or other time period.)

More advanced features

Restricting access to tasks

Access to a specific task can be changed via “Edit Task” and then changing the “Visible To” field to something else than “Public”. This option is only available to some users.

Note that tasks filed as Security issues are not publicly visible.