api-contract-checker
Check API modifications against established contracts to prevent breaking changes.
Install
mkdir -p .claude/skills/api-contract-checker && curl -L -o skill.zip "https://agentskills.codes/api/skills/download/12649" && unzip -o skill.zip -d .claude/skills/api-contract-checker && rm skill.zipInstalls to .claude/skills/api-contract-checker
Activation
This is the description your AI agent reads to decide when to run this skill — the better it matches your request, the more reliably it fires.
Validate API changes against an expected contract. Use when a mid-level developer needs to detect breaking changes.Key capabilities
- →Validate API changes against an expected contract.
- →Compare API endpoints and fields.
- →Identify breaking changes.
- →Suggest versioning or migration notes.
- →Generate a breaking change report.
How it works
The skill compares old and new API specs, identifies breaking changes, and suggests versioning or migration notes to validate API changes against an expected contract.
Inputs & outputs
When to use api-contract-checker
- →Validating a breaking change in an API
- →Comparing new API specs against previous versions
- →Drafting migration notes for consumers
- →Checking compatibility of endpoint updates
About this skill
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
- 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.
When not to use it
- →When there are no API changes to validate.
- →When the user does not need to detect breaking changes.
Limitations
- →Requires old and new API specs or examples as input.
- →Requires versioning policy and client expectations.
- →Requires known consumers and usage patterns.
How it compares
This skill automates the comparison of API specs to detect breaking changes and suggest mitigation, unlike a manual review process.
Compared to similar skills
api-contract-checker side by side with the closest alternatives in the catalog.
| Skill | Installs | Updated | Safety | Difficulty |
|---|---|---|---|---|
| api-contract-checker (this skill) | 0 | 5mo | No flags | Intermediate |
| api-contract-sync-manager | 1 | 10mo | No flags | Intermediate |
| endpoint-validator | 1 | 9mo | Review | Intermediate |
| exa-upgrade-migration | 1 | 27d | Review | Intermediate |
Try saying
Example prompts that trigger this skill in your AI assistant.
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