Idempotent Consumer / State Overhead
Kind: tension
Record: tension:idempotent-consumer-state-overhead
Canonical: Schema
"idempotent-consumer" (execution-core layer) is traded against "State Overhead" (execution-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "State Overhead" and choosing an explicit operating point.
Listed in Tensions, after Dead-Letter Queue / Operational Overhead and before Competing Consumers / Ordering.