# OpenAI Codex in your code editor Source: https://www.youtube.com/watch?v=sd21Igx4HtA Recap page: https://rapidrecap.app/video/sd21Igx4HtA Generated: 2025-10-17T14:31:33.154+00:00 --- ## Quick Overview OpenAI Codex can now be used directly within an IDE as an extension, allowing developers to ask it to perform complex coding tasks like adding hover states or running specific tasks in a secure sandbox environment, which drastically improves workflow efficiency by providing context-aware code generation and review directly within the editor. **Key Points:** - OpenAI released a Codex IDE extension enabling AI-powered coding assistance directly within the developer's environment. - The extension allows developers to ask Codex to implement tasks described in comments, such as adding hover state functionality to a button component. - Codex operates in a safe sandbox environment when running commands, preventing modification of files outside the project scope. - The tool successfully implemented a complex task (adding hover state) and allowed the user to review changes locally or apply them directly. - The extension also supports running tasks like generating multiple approaches to solve a problem (e.g., four different approaches to animating a submission) and running them locally or in the cloud. - The team found the cloud execution of tasks to be successful, handling local changes and running multiple versions concurrently. - Users can download the extension from the OpenAI website or the IDE's marketplace. ![Screenshot at 0:02: The initial demonstration of the Codex IDE extension in action, showing a developer viewing complex code in a dark-themed editor while the AI chat interface suggests implementing 'Codex IDE extension'.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-00-02.png) **Context:** The video features two individuals, Roman and Gabriel, discussing and demonstrating the new OpenAI Codex IDE extension. This extension integrates the powerful Codex large language model directly into the coding environment, aiming to make AI-assisted coding more capable and reliable by giving it context about the entire codebase. ## Detailed Analysis The video showcases the integration of OpenAI Codex as an IDE extension, announced by Roman and demonstrated by Gabriel. The core value proposition is making Codex a more capable and reliable coding collaborator by providing it with the context of the entire codebase. Gabriel demonstrates this by having Codex implement a feature described in a TODO comment: adding hover state functionality to a 'Button' component. Codex successfully generates the required code changes, which are presented for review. A key safety feature is that when Codex executes code or runs commands, it operates within a secure sandbox, ensuring it cannot modify files outside the current project. Gabriel further shows that Codex can handle multiple attempts to solve a problem; for instance, generating four different approaches to animate a submission, and these tasks can be executed locally or in the cloud. The cloud execution worked successfully, including incorporating local changes. When reviewing the changes in the IDE, the user can choose to apply them locally or reset them. Finally, Gabriel points out that the new hover state functionality now applies to other elements like the toggle switch and the top-right corner toggle, demonstrating the model's contextual understanding. The video concludes with instructions on how to download the extension from the OpenAI website or the marketplace. ### Introduction to Codex IDE Extension - Steadily improving Codex to feel like a more capable and reliable coding collaborator - Launching an IDE extension to bring Codex directly into the editor - Supported IDEs include VS Code, Cursor, and others. ### Feature Demonstration - Implementing a TODO comment to add hover state to the Button component - Codex successfully suggests and implements the necessary code changes in Button.tsx and Button.module.css. ### Safety and Execution Context - Codex runs commands in a safe sandbox environment, ensuring it only modifies files within the project - The user can choose to apply changes locally or reset them before applying. ### Advanced Task Handling - Codex can generate multiple approaches (e.g., four different approaches) for a single problem, like animating a submission - Tasks can be run locally or in the cloud, with the cloud execution successfully incorporating local context. ### Contextual Understanding - After implementation, Codex correctly updates related components, like adding hover states to other UI elements (e.g., the toggle switch) - The tool enhances workflow by providing immediate feedback on context-aware changes. ### Conclusion and Availability - The extension is included in the GPT-4 subscription - Users can download it from opena.ai/codex or the IDE marketplace. ![Screenshot at 0:00: A production assistant claps a slate to begin filming, setting the scene for a tech demonstration.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-00-00.png) ![Screenshot at 0:02: The initial screen showing the Codex IDE extension interface overlayed on a dark-themed code editor, with the prompt 'Implement with Codex' visible.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-00-02.png) ![Screenshot at 0:37: A close-up view of the code editor showing the 'useServiceWorker' function and the prompt area where Codex is working on the code.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-00-37.png) ![Screenshot at 0:53: The Codex interface showing the 'Auto context' button being selected, indicating the AI is about to analyze the surrounding code.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-00-53.png) ![Screenshot at 1:37: The IDE panel displaying the results of the first attempt, showing code changes related to the service worker registration logic.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-01-37.png) ![Screenshot at 2:31: The user switching to the browser view to demonstrate the visual outcome of the code changes in the OpenAim application interface.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-02-31.png) ![Screenshot at 3:35: The user changing the IDE setting to 'Run in the cloud' for executing a task remotely.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-03-35.png) ![Screenshot at 4:45: The user showing the successful outcome in the browser where the hover state animation is now working on the button component.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-04-45.png) ![Screenshot at 5:51: The browser view showing the OpenAim application with the 'Sage' voice selected and a new script loaded, demonstrating a different use case for voice selection.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-05-51.png) ![Screenshot at 6:16: The IDE panel after the second attempt, showing that Codex has modified additional files to implement the hover state across more components.](https://ss.rapidrecap.app/screens/sd21Igx4HtA/00-06-16.png)