Will my worker know when I assign them a task?

Heirloom sends no message, and nobody needs one: each person opens their own week with a filter. In Tasks: Filters, then Assignee, then their own name, shown as Me. The List and the Week Board then show only their tasks.

The filter stays in place, so a worker who sets it once finds their week ready each time they open Heirloom.

The steps are in Assign tasks to your team.