Chapter III
Cohort Attrition
Nocturne Ledger
Patron study · twelve-month cohorts
Patrons leave by dimming first.
Activity index before cancellation
n=18,420 patrons
100
75
50
25
30 days: silence hardens
Open, visit, and reply signals fall below recovery range.
−90d
−75d
−60d
−45d
−30d
Cancel
Indexed engagement, last active cycle = 100
This is the
Rembrandt Baroque
design system, applied by
Curio Design
— a design-style library for AI agents. Full Rembrandt Baroque guide →
designbycurio.com/learn/rembrandt-baroque-1640