Service Locator Pattern / Testability
Kind: tension
Record: tension:service-locator-pattern-testability
Canonical: Schema
"service-locator-pattern" (extensibility-core layer) is traded against "Testability" (computation-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Testability" and choosing an explicit operating point.
Listed in Tensions, after Registry Pattern / Global State and before Service Locator Pattern / Dependency Inversion Principle (DIP).