contract-tester

What it does

This skill enables AI agents to execute contract testing, verifying that API interactions align with predefined service level agreements. It ensures system reliability by validating that consumer expectations match provider implementations before deployment.

When to use it

• Pre-deployment validation: Run tests immediately before releasing new API versions to prevent breaking changes.
• Microservices integration: Verify communication standards between loosely coupled services in distributed architectures.
• Consumer-driven contracts: Validate that your service changes do not violate agreements made with dependent applications.
• CI/CD pipelines: Integrate automated checks into build processes to catch interface drift early.

Key capabilities

• Validates API endpoints against defined contract specifications
• Detects breaking changes in request/response schemas
• Ensures compatibility between service providers and consumers
• Supports automated verification of service level agreements

Example prompts

• "Run contract tests on the new user authentication endpoint to verify it matches our consumer expectations."
• "Check if the latest database migration breaks any existing API contracts for the payment service."
• "Validate that the updated notification service adheres to the agreed-upon response format for mobile clients."

Tips & gotchas

Ensure you have clear contract definitions (such as OpenAPI specs or Pact files) before running tests, as the skill relies on these predefined agreements. Limitations may exist if your team uses non-standard API documentation formats that aren't easily parseable by the testing framework.