Right now, we have the "Bug: T12345" keyword, which causes Gerrit Notification Bot:
- Comment on the Phab task that there's an associated commit
- Adds the "Patch-for-Review" project
- When it's merged, makes a comment to that effect
However, it doesn't mark the task as Status:Resolved when the commit is merged. I think this is because tagging it with a Bug number does not always mean the bug is always fixed.
If there were a Fixes-Task keyword, that would allow automatically marking the bug as fixed without ambiguity. Using this keyword would mean that the current patch set alone is sufficient to fix the bug (any prior steps are already merged).
"Bug: T12345" would remain available, for when the patch set was just one step towards fixing the bug.