The Codex app is a new desktop tool designed to enhance how developers work with AI agents. Launched in April 2025, Codex has evolved from merely generating code to managing complex tasks across multiple projects. Developers can now delegate work to various agents, running tasks in parallel and overseeing long-term projects. Traditional tools like IDEs and terminals aren't equipped for this type of collaborative work, which is where the Codex app comes in as a command center for managing these agents effectively. One of the standout features of the Codex app is its ability to use "skills," which extend its functionality beyond simple code writing. These skills allow Codex to handle tasks such as gathering information, problem-solving, and writing. Developers can create and manage these skills directly within the app, specifying which ones to use or allowing Codex to select them based on the context of the task. An example given is a racing game Codex created independently, integrating various skills to fulfill the project requirements, demonstrating its capacity for complex, multi-step tasks. The app also includes a library of pre-built skills tailored for popular tools and workflows used at OpenAI. For instance, it can fetch design assets from Figma and convert them into UI code while managing project tasks in Linear. This integration streamlines processes, allowing teams to delegate a range of responsibilities to Codex, from drafting documentation to handling training evaluations. By automating these tasks, developers can focus on higher-level strategies and creativity.