Contract-First Design / Iteration Speed
Kind: tension
Record: tension:contract-first-design-iteration-speed
Canonical: Schema
"contract-first-design" (contracts-core layer) is traded against "Iteration Speed" (structural-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Iteration Speed" and choosing an explicit operating point.
Listed in Tensions, after Interface-Based Design / Interface Overuse and before API Contract / Evolution.