The article describes how to replicate Cursor's Agent mode capabilities using E2B Sandboxes and AgentKit. The goal is to create a Coding Agent that can perform tasks such as generating a complete working project from a given prompt, fixing bugs or performing refactoring on an existing codebase, and running terminal commands to assess the program's health. To achieve this, the authors use E2B Sandboxes to provide a quick and safe environment for the agent to interact with, and AgentKit's library to enable autonomy and react to its actions. The Coding Agent is designed using best practices such as tool design and context pulling, which allows it to interact with its environment and perform tasks autonomously.