Evolve a JSON Contract Without Breaking Consumers
Apply backward-compatibility checks before changing a JSON response contract.
Schema change A new loyalty_tier field is useful for Friday's demo, but legacy clients still consume the customer response. The change is only safe if old expectations remain true. Compatibility path Add without changing old meaning The safest JSON evolution is additive, optional where old clients are involved, and verified against consumer contracts. Ship field Assume JSON parsers ignore it. New clients can adopt the field without breaking old clients. Compatibility is about old clients continuing to receive what they reasonably expected. 01 Classify 02 Protect 03 Verify New field Product asks for loyalty_tier in the customer response. No existing…
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