Yellow JacketCatch HTTP regressions before they sting.

Developer-first HTTP regression testing for routes and API workflows.

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HTTP regression testing

Store known-good responses and detect status, body and structural regressions.

Chained scenarios

Create, capture, reuse and delete resources through sequential HTTP workflows.

Route coverage

Compare your declared tests against OpenAPI and sitemap route inventories.

Git pre-push protection

Block pushes when HTTP behavior changes unexpectedly.

CI-friendly reports

Generate text, JSON, Markdown and standalone HTML reports.

Small dependency surface

Built mostly on Node.js native APIs with one focused YAML parser for OpenAPI discovery.

HTTP regression testing for developers

Yellow Jacket runs declared HTTP requests against your application and compares the results with a known-good baseline.

text

code change
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v
yellow-jacket run
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+-- expected behavior ----> push continues
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+-- regression detected --> push stops

It is designed to sit close to the development workflow rather than becoming another test server or hosted platform.

Built for local development and CI

Use Yellow Jacket locally through its Git pre-push hook, then reuse the same configuration in GitHub Actions, GitLab CI or another automation environment.

bash

yellow-jacket baseline
yellow-jacket run
yellow-jacket coverage

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