AI agent skill · by @proflead

Api Contract Checker

Validate API changes against an expected contract. Use when a mid-level developer needs to detect breaking changes.

Archived 2026-10-23 · Source updated 2026-07-29. Check the original repository for the latest version.

SKILL.md instructions

# 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.