Summary
This episode of How I AI focuses on practical browser and computer use with OpenAI’s Codex (via the ChatGPT desktop app), walking through three distinct use cases that go beyond the standard demos. The presenter explains the setup: the ChatGPT or Claude desktop app plus a Chrome browser extension together give the AI the ability to control the mouse, keyboard, and browser — effectively a virtual coworker with hands on your computer.
The first use case is using Codex to validate UI changes made during coding sessions, invoking it with @browser, @chrome, or @computer flags to run smoke tests on a live onboarding flow. The second, more substantial use case shows Codex performing a comprehensive QA sweep across desktop and mobile viewpoints, then automatically generating a Google Sheet that logs 11 issues — including severity ratings, reproduction steps, screenshots, and remediation notes — which sub-agents can then use to prioritize fixes. The third use case, credited to her husband EJ Lawless, demonstrates having Codex impersonate three different user personas (a product manager, an engineer, a team leader) as it navigates Chat PRD, then synthesizing the experience into a research-style critique document covering friction points and improvements.
For developers and product teams evaluating agentic QA pipelines, the video provides concrete invocation patterns, realistic output examples, and a framework for persona-driven UX testing without recruiting actual users.
📺 Source: How I AI · Published July 22, 2026
🏷️ Format: Tutorial Demo
