data-api-contract-changer

To evolve API contracts without breaking consumers, you must enforce Expand → Migrate → Contract sequencing and generate forward and rollback migration steps with explicit compatibility classification to ensure safe rollout and rollback.

EMC sequencing is an Expand → Migrate → Contract pattern required for breaking changes and staged rollouts. It ensures backward compatibility by expanding capabilities first, migrating data, then tightening the API contract.

Model validation errors using RFC 7807-style semantics to maintain machine-readable contract quality gates. This standard ensures clients can reliably parse and handle validation updates during schema evolution.

Design idempotent write endpoints by explicitly defining idempotency requirements within your contract change plan. This ensures retry-safe operations for clients during database schema and API request or response updates.

Yes, you can automate rollback safety by producing tested rollback migration steps alongside forward migrations. Compatibility classification and consumer readiness checks ensure rollback safety for request and response DTO changes.

The best way to plan deprecation is by applying explicit compatibility classification across releases. This enables structured error-code and versioning planning, protecting existing clients while you modify API contracts.