It would be useful for Phabricator to exclude some tags, which it automatically copies over, when creating subtasks.

We create large tasks and tag them with Epic. Then we use the in-task subtasking feature "Create Subtask" to make children of the larger initial task. The subtasks are presumed by Phab to have the same tags, which is very handy except that in the case of Epic it's more of a nuisance. This is because an epic is usually not spawning more epics (though it may), so these have to be manually removed.

What this means is that the non-epics now have Epic on them, and when filtering out epics the subtasks are also filtered out (assuming the tag was not manually removed, which in my experience is common).

The same could be true of Spike . Someone makes a spike, creates acceptance criteria that says "make a subtask explaining what to do next" and then the subtask is autopopulated with Spike , but the followup task is not typically a spike, so the tag has to be manually removed.

Another potential example in T220568: A way to track when a ticket was created with a pre-filled template