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Last updated: April 29, 2026
Why this module. APIs evolve; consumers break. Contract testing catches it before production. From a security view, contract testing also catches “we accidentally exposed an internal field” and “auth was removed from this endpoint.”
Why this module. APIs evolve; consumers break. Contract testing catches it before production. From a security view, contract testing also catches “we accidentally exposed an internal field” and “auth was removed from this endpoint.”
Two patterns
- Schema-first — OpenAPI spec is the contract. Validate every request/response.
- Consumer-driven (Pact) — consumers declare expectations; provider validates them.
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