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---
name: api-contract-checker
description: Validate API changes against an expected contract. Use when a mid-level developer needs to detect breaking changes.
---
# 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.
