Add reminders for schedule tasks assigned to contacts

I want to be able to set reminders on schedule tasks that are assigned to contacts — so when a phase or task is coming up, I get notified (and ideally the assigned contact does too). Right now I can assign vendors and subs to schedule phases, but there’s no way to set a reminder to follow up or alert them automatically before the task starts. This would help me stay on top of scheduled work without having to manually track everything.