Tests that write and fix themselves
E2E tests are the right safety net. They're just expensive to keep green
AI code agents ship features fast. E2E tests are the right safety net, but they're expensive to build and even more expensive to keep green. UI changes break selectors. Flows shift. Tests go red for reasons that have nothing to do with your code. What started as a quality investment becomes a maintenance burden that grows faster than your team can manage.
The problem compounds over time. Engineers stop trusting the suite. Failures get ignored because half of them are noise. Coverage drifts because nobody has time to write new tests while the old ones are still broken. You end up shipping with less confidence than you had before you built the suite, which defeats the entire point of having one.
How End-to-end testing works
Maps your entire application
The agent builds a graph of every screen, interaction, and flow in your app. This deep understanding powers everything it does.
Detects what needs testing
Automatically identifies critical user journeys based on your app's structure and recent code changes. No more guessing what to test.
Builds production-ready tests
Creates actual Playwright code that integrates directly into your repository. Not vendor-locked scripts—real code you can run anywhere.
Heals broken tests automatically
When selectors change or flows shift, the agent fixes tests in the background. Your suite stays green without manual intervention.
Integrates with coding agents
Works directly with Cursor, Claude Code, and other AI tools via slash commands. Type /checksum to generate tests on the fly.
Two ways to work
Both approaches create the same output: production-ready Playwright tests that live in your repository.
Web interface
- Open chat, describe what you want tested
- Agent works in the background while you do other things
- Come back to fully generated tests ready for review
- Perfect for generating 10-100 tests overnight
Direct in your IDE
- Type
/checksum detect testsin Cursor or Claude Code - Generate tests without leaving your editor
- Tests appear as PRs for review
- Perfect for testing while you build
Frequently Asked Questions
Cursor generates tests when you ask. Checksum continuously detects what needs testing, generates it, and heals it when it breaks. It's the difference between on-demand and continuous.
Yes. These are standard Playwright tests that integrate into your existing suite.
All healing comes as PRs you review. You see exactly what changed and can reject or modify it.
Absolutely. They're your code. Edit them however you want.
No. It removes the low-leverage work (writing and maintaining tests) so QA can focus on exploratory testing, edge cases, and quality strategy.
The agent can work with your existing test data setup, or we can help configure dynamic test data generation.
The application graph captures auth flows, multi-step processes, and conditional logic. Tests are generated with proper setup and teardown.
Stop babysitting tests. Start shipping features.
Generate comprehensive E2E coverage in days, not months. Let auto-healing keep your suite green while you build.
