When to use

• At the top of every page inside the app shell.

Rules

• The breadcrumb shows where the page sits; the last item is the current page, not a link.
• One h1: the page's name. A status badge can sit beside it.
• One line of context under the title – counts, dates, owner.
• Actions on the right on wide screens, under the title on narrow ones. The primary action is last and the only default button.