Status: IN
Template Method's Hollywood principle serves dual architectural purposes in the event-driven subsystem: it enforces Observer's pre-notification consistency (guaranteeing self-consistent state before Notify) AND it enables Factory Method's creational inversion (making type selection a framework-controlled extension point), demonstrating that the Hollywood principle's inversion of control is the unifying mechanism for both correctness constraints and extensibility in the GoF system.
Two independently necessary uses of Hollywood inversion (safety and creation) converge through Template Method, revealing Hollywood as a deeper architectural primitive
Depends on (SL): observer-consistency-via-template-method, factory-method-inherits-hollywood-inversion