API Contract Checker
SkillDev toolsValidate API changes against an expected contract. Use when a mid-level developer needs to detect breaking changes.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the API Contract Checker skill
What this skill tells your AI
The instructions your AI receives, as published by proflead/codex-skills-library in skills/api/api-contract-checker/SKILL.md and read by ahel’s review.
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
- Compare endpoints, request/response fields, and status codes.
- Identify breaking changes and backward-compatible adjustments.
- 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.
Signals
- GitHub stars
- 144
- Forks
- 30
- Last commit
- Jul 2026
Advanced
- Catalog kind
- skill
- Gateway key
api-contract-checker- Source
- github.com/proflead/codex-skills-library