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contract-testing

Automate consumer-driven contract testing for microservices using Pact and schema validation.

1|Updated Dec 29, 2025
Search Tags:#api#microservices#breaking changes#contract testing#pact#provider verification
One-click install
npx skills add https://github.com/aquariuscook/Agent_Modus_Map --skill contract-testing-aquariuscook
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: contract-testing
Source: https://github.com/aquariuscook/Agent_Modus_Map/tree/main/.claude/skills/contract-testing
Command: npx skills add https://github.com/aquariuscook/Agent_Modus_Map --skill contract-testing-aquariuscook

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill addresses the challenges of ensuring that microservices communicate reliably by verifying that API providers adhere to the contracts defined by their consumers, preventing integration issues and breaking changes.

Core Features & Use Cases

  • Consumer-Driven Contract Testing: Utilizes tools like Pact to define and verify API interactions from the consumer's perspective.
  • Provider Verification: Ensures that API providers fulfill all defined consumer contracts.
  • Breaking Change Detection: Identifies potential breaking changes in API evolution and recommends semantic versioning updates.
  • Use Case: In a microservices architecture, when the OrderService is updated, this Skill automatically verifies that the CheckoutUI and MobileApp can still interact with it as expected, preventing deployment rollbacks due to unexpected API changes.

Quick Start

Use the contract-testing skill to verify the provider 'OrderService' against all its consumer contracts.

Frequently Asked Questions about contract-testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I prevent breaking changes in microservices APIs?▼

Consumer-driven contract testing prevents breaking changes in microservices APIs by using Pact to verify that API providers fulfill the contracts defined by their consumers before deployment, ensuring reliable inter-service communication.

What is consumer-driven contract testing and how does it work?▼

Consumer-driven contract testing defines API interactions from the consumer's perspective using Pact. It verifies that API providers fulfill these defined contracts, preventing integration issues by checking backward compatibility before updates are deployed.

Do I need OpenAPI and JSON Schema for provider verification?▼

Yes, comprehensive provider verification requires OpenAPI/Swagger and JSON Schema alongside Pact. These formats enforce contracts by validating that API providers fulfill all defined consumer expectations during microservices communication.

How do I verify an API provider against consumer contracts?▼

You verify an API provider against consumer contracts by automating provider verification with Pact. This checks that the provider's API interactions match all defined consumer expectations, preventing deployment rollbacks due to unexpected API changes.

When do I need contract testing for API versioning?▼

You need contract testing for API versioning when evolving microservices to identify potential breaking changes. It recommends semantic versioning updates and verifies backward compatibility by checking updated services against existing consumer contracts.

Can I use this for backward compatibility testing in microservices?▼

Yes, this Skill facilitates backward compatibility testing in microservices by automating consumer-driven contract testing with Pact. It verifies updated services still interact correctly with consumers, preventing deployment rollbacks from unexpected API changes.

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