In his blog post, Gleb Bahmutov explores techniques for controlling an AngularJS application directly from end-to-end (E2E) tests using Cypress. The post explains how Cypress's close proximity to the application allows developers to manipulate application code directly, bypassing the Document Object Model (DOM). Bahmutov demonstrates how to modify an application's data model from the DevTools console and how to access AngularJS instances within the Cypress Test Runner. He provides examples of setting properties on an AngularJS scope object, triggering updates with the digest cycle, and using helper functions to interact with elements and their scopes. The post also discusses the complexity of directly manipulating application internals, such as localStorage, and the potential risks of tightly coupling tests to implementation details. Bahmutov concludes by advising developers to carefully consider the trade-offs of such direct access in E2E testing.