With Cypress, you can easily create tests for your modern web applications, debug them visually, and automatically run them in your continuous integration builds.

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how do we preserve login between each spec with cypress 10?

Do some reading here: https://docs.cypress.io/api/commands/session

Wondering why the change was implanted for it to be a new blank page every time now? Wouldn’t this be longer text runs

It's a broadly accepted concept in test automation planning that tests should run independently without side effects - and any individual test should be able to run on its own. Clearing to a blank page enforces this concept.