Adapter Pattern / Mapping Overhead
Kind: tension
Record: tension:adapter-pattern-mapping-overhead
Canonical: Schema
"adapter-pattern" (design-patterns-core layer) is traded against "Mapping Overhead" (structural-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Mapping Overhead" and choosing an explicit operating point.
Listed in Tensions, after Singleton Pattern / Dependency Injection and before Facade Pattern / Over-Centralization.