Replicating Cursor’s Agent Mode with E2B and AgentKit

Cursor's Agent mode, introduced in November 2024, revolutionizes coding by enabling autonomous capabilities such as reading terminal outputs, fixing bugs, and refactoring code using the E2B Sandboxes and AgentKit. This implementation focuses on building a Coding Agent that replicates Cursor's functionalities, including generating projects, running tests, and creating or updating files in a sandbox environment. The Coding Agent relies on the ReAct and CoT prompt structures and uses tools like createOrUpdateFiles and readFiles to interact with the E2B Sandbox filesystem. By leveraging the AgentKit library, the agent operates within an "autonomous loop," allowing it to refine its actions based on tool outputs until a task is complete. This design, which emphasizes "LLM empathy," mirrors the capabilities of Cursor's Agent, and by integrating Model Context Protocol (MCP) servers, the agent can also browse the web autonomously. Consequently, the Coding Agent can perform complex tasks such as creating a Next.js TodoList with unit tests, showcasing its potential to simplify and enhance coding workflows.