Iterator Pattern / Simplicity
Kind: tension
Record: tension:iterator-pattern-simplicity
Canonical: Schema
"iterator-pattern" (design-patterns-core layer) is traded against "Simplicity" (human-factors layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Simplicity" and choosing an explicit operating point.
Listed in Tensions, after Chain of Responsibility Pattern / Traceability and before Visitor Pattern / Element Stability.