Libretto

Libretto brings autonomous debugging to browser automation workflows. When Playwright tests fail in CI/CD or locally, the tool steps in to understand why—by examining the actual page state—and generates a pull request with proposed fixes rather than leaving developers to troubleshoot manually.

Highlights

• Integrates directly into error handling without modifying test code
• Opens GitHub pull requests with ready-to-review fix suggestions
• Works with any Playwright setup and browser provider (local, self-hosted, or cloud)
• Powered by LLMs (you supply your own API key)
• Open-source and free to deploy

Ideal for teams running Playwright tests at scale who want to reduce time spent debugging flaky or broken tests. Since the tool itself is free, costs are minimal—you only pay for LLM API calls and your browser provider as usual.