The latest TaskPaper beta is coming along nicely. The new date formatting for filters is a welcome addition. It's a nice combination of natural language and modifiers. To filter on tasks starting in the next 7 days
@done <=[d] next week +7d does the trick.
You can read more about it in the draft support documentation
There's also a new scripting guide available.
Unfortunately, saved searches are broken in this beta. That'a inevitable as major new features rollout for testing.