API Contract Checker

Purpose

Validate API changes against an expected contract.

Inputs to request

• Old and new API specs or examples.
• Versioning policy and client expectations.
• Known consumers and usage patterns.

Workflow

1. Compare endpoints, request/response fields, and status codes.
2. Identify breaking changes and backward-compatible adjustments.
3. Suggest versioning or migration notes.

Output

• Breaking change report with mitigation steps.

Quality bar

• Flag any removal or behavior change clearly.
• Recommend safe rollouts for clients.