Cypress v15.21.0

Deprecations:

• cy.exec() has been deprecated and will be removed in a future major release of Cypress. Use cy.task() instead, which runs in Node without depending on the operating system, shell, or terminal of the machine running Cypress. The execTimeout configuration option is deprecated alongside it, in favor of taskTimeout. Addresses #34639.

Features:

• Added the cypress tap command, which gives your AI agent direct access to your open-mode Cypress session. It lists the open-mode Cypress sessions running on the machine, starts and reruns a spec, reports a run's status and results, prints a failing test's error and Command Log, and inspects the DOM and accessibility tree of the application under test. Every subcommand prints readable output by default and machine-readable JSON with --json. Run cypress tap --help for the full list of subcommands. Addresses #34036.
• Added a CYPRESS_DISABLE_GUEST_TELEMETRY environment variable, which disables any reporting Cypress sends for non-logged sessions. This includes anonymous usage events within Cypress open-mode and the Cypress CLI. Addressed in #34540.

Bugfixes:

• Fixed an issue where WebKit runs could hang indefinitely when more parallel requests than the browser's per-host connection pool were intercepted by a cy.intercept() route with a request handler. Fixes #33926 and addresses #23807.
• Fixed an issue where overriding blockHosts with test configuration (for example describe('...', { blockHosts: [...] }, ...)) had no effect, so requests were still blocked or allowed according to the project-level value. Test-level blockHosts overrides now take effect at runtime and are restored between specs. Fixes #21151.
• Fixed an issue where cypress run printed the (Attempt N of M) line twice for the same attempt when a beforeEach and an afterEach hook both failed during that attempt. Fixes #26143.
• Fixed an issue where passing an object to the have.attr, have.css, or have.prop assertions, such as .should('have.css', { backgroundColor: 'rgb(128, 0, 0)' }), applied those styles, attributes, or properties to the element and passed instead of asserting on them. These assertions now fail with an error stating that the name must be a string. Fixes #26451.
• Fixed an issue where the console props output for a cy.env() command listed the requested environment variable names under numbered keys instead of a single Env vars label. Addressed in #34615.
• Fixed an issue on Windows where adding, renaming, moving or deleting a spec file while cypress open was running was not reflected in the specs list, leaving stale specs until Cypress was restarted. Clicking a spec that had been renamed or moved could then fail to run. Projects whose specPattern contains a directory, such as the End-to-End Testing default cypress/e2e/**/*.cy.{js,jsx,ts,tsx}, were affected. Fixes #22303.

Dependency Updates:

• Upgraded @sinonjs/fake-timers from 11.3.1 to 14.0.0. While cy.clock() is active, the faked performance object now implements performance.mark() and performance.measure() (previously no-ops that returned undefined) and reports a faked performance.timeOrigin. Addressed in #34377.