== Current situation ==
We have numerous team backlog funneling Herald rules like this:
* When **all** of these conditions are met:
** Project tags include **any** of { `#some_code_project1` | `#some_code_project2` }
** Project tags include **none** of { `#team_parent_project` | `#team_sprint1_milestone` | `#team_sprint2_milestone` }
* Take these actions first|every time this rule matches:
** Add projects: { `#team_parent_project` }
Currently, after creating `#team_sprint3_milestone` (as a direct milestone of the `#team_parent_project`) and **not** manually adding `#team_sprint3_milestone` to the "none" Herald rule and creating a task tagged with both `#some_code_project1` && `#team_sprint3_milestone`, Herald will immediately remove `#team_sprint3_milestone` from the task and add `#team_parent_project`. Which is unwanted.
So in one sentence, we'd like to eliminate the need to define/edit `none: #team_sprintX_milestone`
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==== Original task title ====
"Develop a custom herald condition for maniphest tasks: "projects include any subprojects of ___ ""
==== Original task description ====
This would allow us to have herald rules that automatically add the parent project when any sub-project is added to a task.
The main benefit is that we wouldn't need to manually update herald every time a new subproject gets created.