Object-oriented design doctrine associated with Scott Bellware and the Eventide project. Core rules: an instantiated object must never raise nil-reference errors from uninitialized dependencies (hence 'useful', not 'useless'); initializers are primitive, only accepting and recording primitives, with no logic, cherry-picking or dependency wiring; dependencies are separated from initialize and exposed as null-coalescing attributes defaulted to substitutable null implementations (via Mimic/Dependency), so tests don't need mocks, stubs or spies; convenience is provided through class-level factory/constructor methods (e.g. `build`) while the instance interface remains mechanically correct; no IoC container is required — a class configures its own operational dependencies. Ladd earlier credited the Test Bench V1 rewrite with making Useful Objects 'click': the economics of encapsulation change when you have to know a class is truly done before moving to the next. The full methodology is written up in a long-form article by Bellware.