Start With the Consumer's Use

Consumer-driven means the use case drives the guarantee. Providers See Shape; Consumers Feel Breakage A producer may see a nullable column, a rarely used enum, or a harmless rename. A consumer may see a broken fraud model, a compliance report, or an executive metric. Consumer-driven contracts close that perception gap by making the consumer's actual dependency visible. Narrow Is Strong A contract that guarantees everything becomes too expensive to evolve. A contract that guarantees only table existence is too weak to trust. The useful middle is the consumer-critical slice: stable fields, semantic definitions, quality thresholds, freshness, and change process for…

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