Contract-First Event-Driven Architecture on AWS

Short summary

Contract-first event-driven architecture treats schemas as product interfaces to prevent breaking changes across distributed teams. Enforce contracts through Git source-of-truth, producer-side validation before publishing, and consumer tolerance patterns that read only required fields. Use EventBridge Schemas and CI/CD checks for compatibility—enabling safe independent deployments at scale without runtime brittleness from undocumented changes.

• •Schema governance enforced at design-time via Git and CI, not discovered at runtime on the bus
• •Producers validate before PutEvents; consumers read only needed fields and ignore unknowns
• •EventBridge Schemas + Git contracts + CI compatibility checks + consumer tolerance = safe multi-team deployments

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