SCHEMA.

28 JSON payloads sampled into draft schemas. 6 schemas reveal optional fields the producer never declared. 2 schemas catch a field-type drift the consumer was silently coercing.

A schema you didn't write is a schema your consumer made up.

JS-018 · /v1/orders payload TYPE DRIFT

amount field: 84% number, 16% string. Spec says number.

Coerce server-side, fail closed on string, document fix.