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- web_test.go walks web.AdminPatterns() rather than naming routes by hand, so a new administrative route that forgets requireOwner fails the gate test instead of shipping open. - The harnesses take a LaneReporter; a fake one keeps the page's tests free of a poller and a Site. - backend/AGENTS.md records the adminRoutes/requireOwner rule and the nil-poller trap; design-system.md records --patina and the admin page's shape.