Descriptions:
Riley Brown’s full-course tutorial covers every major feature of OpenAI’s Codex desktop app, positioning it as a unified AI agent platform that combines coding, browser automation, and computer use in a single interface. The course walks viewers through prompting fundamentals, model selection, effort settings, permissions, automations, custom skills and plugins, document and spreadsheet creation, and Codex’s computer use capability — which allows the agent to control the mouse and keyboard directly.
The second half of the video shifts into hands-on multitasking, where Brown simultaneously builds a mobile app design, an iOS Swift app (using Xcode and iOS Simulator), a full web app, an investor deck, and a launch video — all running as parallel Codex tasks. The tutorial explains why multitasking matters as AI agents take on longer and longer autonomous runs, sometimes lasting one to two hours per task.
Practical details include how to organize projects with specific working directories, how to create and share reusable mobile design skills, and how to connect Codex to Xcode for native iOS development. The video is aimed at anyone who wants to move beyond basic ChatGPT usage and adopt Codex as a general-purpose productivity and development agent across coding, design, and business workflows.
📺 Source: Riley Brown · Published April 20, 2026
🏷️ Format: Tutorial Demo
