Can I use this skill to prevent breaking changes?

Absolutely. The skill is designed to identify backward compatibility violations that would break existing integrations before they reach production.

What is consumer-driven contract testing?

It is a methodology where consumers define their requirements for an API, and providers are tested against those 'contracts' to ensure they meet the specific needs of their users.

Does this skill support OpenAPI specifications?

Yes, it validates API responses and requests against OpenAPI specifications to ensure your documentation and implementation remain perfectly in sync.

What testing frameworks are supported?

The skill primarily leverages Pact for contract testing and standard OpenAPI validation protocols for specification compliance.

How do I trigger contract validation in Claude Code?

You can trigger the skill by asking Claude to 'validate the API contract', 'generate Pact tests', or 'check OpenAPI compliance'.

API Contract & Pact Testing

Name: API Contract & Pact Testing
Author: jeremylongshore

byjeremylongshore

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884

Security & Testing

Automates API contract validation and consumer-driven testing using Pact and OpenAPI to ensure backend compatibility.

About

This skill empowers developers to maintain robust API interfaces by automating the creation and validation of contracts between services. It utilizes Pact for consumer-driven contract testing to ensure providers meet consumer expectations, while simultaneously validating APIs against OpenAPI specifications to catch breaking changes early. It is particularly useful for teams working with microservices or distributed architectures where maintaining cross-service compatibility and backward compatibility is critical for stable, reliable deployments.

Key Features

Generates Pact consumer-driven contract tests automatically
884 GitHub stars
Validates API responses against OpenAPI specifications
Detects breaking changes and backward compatibility issues
Creates provider verification tests for contract fulfillment
Identifies discrepancies between documentation and actual API behavior

Use Cases

Ensuring microservice compatibility before deployment in a distributed system
Generating provider verification suites directly from OpenAPI definitions
Validating that a new API version remains backward compatible with existing consumers

About

Key Features

Generates Pact consumer-driven contract tests automatically
884 GitHub stars
Validates API responses against OpenAPI specifications
Detects breaking changes and backward compatibility issues
Creates provider verification tests for contract fulfillment
Identifies discrepancies between documentation and actual API behavior

Use Cases

Ensuring microservice compatibility before deployment in a distributed system
Generating provider verification suites directly from OpenAPI definitions
Validating that a new API version remains backward compatible with existing consumers