Cypress

Cypress is a browser testing CLI for running end-to-end and component tests against web apps. It can launch the interactive Cypress app for local debugging, run suites headlessly in CI, and expose a Node module API for programmatic test execution.

• Run end-to-end or component test suites in Electron or installed browsers, scoped by spec, project path, config overrides, and env variables.
• Open the interactive Cypress app to select projects, inspect failing tests, and debug browser-driven test runs locally.
• Record runs to Cypress Cloud and feed custom reporters or module API results into CI workflows, including screenshots and video metadata.

• Useful when an agent already has a Cypress project and needs a direct browser-verification step after changing a web app.
• The shell surface is scriptable for run, verify, cache, and info, with stable flags for specs, browsers, config, env, and reporters.
• Structured results are stronger through the Node module API than the CLI itself; shell output is mostly human-readable and the richest debugging workflow lives in cypress open.

• Setup is heavier than a single-binary CLI because the npm package installs and verifies a separate Cypress executable.
• A lot of the product's day-to-day value is still GUI-first, so unattended shell usage is best for executing existing tests rather than authoring or deep debugging.