How does it handle negative test cases?

Fixtures prefixed with 'invalid_' are treated as expected failures, allowing developers to verify that the schemas correctly reject malformed data.

Where are the schemas and fixtures stored?

The skill looks for JSON fixtures in 'skills/contract-checker/fixtures/' and command/decision schemas in 'contracts/schemas/'.

What does the Contract Schema Validator skill do?

It ensures that your JSON fixtures match your defined command and decision schemas, identifying breaking format changes instantly to prevent downstream errors.

Is this skill suitable for CI/CD pipelines?

Yes, it emits a non-zero exit status when expectations are not met, making it perfect for automated build and validation workflows.

Does it support complex data structures?

Yes, it validates any JSON structure defined by standard JSON Schemas, specifically optimized for command and decision patterns.

Contract Schema Validator

Name: Contract Schema Validator
Author: Nepopams

byNepopams

0•

Security & Testing

Validates JSON schemas and fixtures to ensure data integrity and prevent breaking format changes in contract-driven applications.

The Contract Schema Validator is a specialized tool for Claude Code designed to automate the verification of JSON schemas and data fixtures. It systematically validates command and decision schemas against provided JSON inputs, ensuring that all data structures adhere to defined standards. By implementing a 'fail-fast' mechanism and supporting negative testing via 'invalid' markers, this skill helps developers catch integration errors early in the development lifecycle, making it indispensable for projects relying on strict API contracts and data modeling.

Key Features

01Comprehensive fixture testing within specialized project directories

020 GitHub stars

03Automated validation of command and decision JSON schemas

04Support for negative testing with expected failure fixture handling

05Detailed validation reporting with standardized exit status codes

06Fail-fast logic for immediate identification of breaking format issues

Use Cases

01Automating schema validation within CI/CD testing pipelines

02Verifying API contract consistency during schema migrations

03Validating mock data fixtures against evolving backend requirements

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add nepopams/vr_ai_platform contract-checker

For use in Claude.ai and ChatGPT

Download Skill